CN114006548A - Bidirectional energy storage converter - Google Patents

Bidirectional energy storage converter Download PDF

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Publication number
CN114006548A
CN114006548A CN202111375171.9A CN202111375171A CN114006548A CN 114006548 A CN114006548 A CN 114006548A CN 202111375171 A CN202111375171 A CN 202111375171A CN 114006548 A CN114006548 A CN 114006548A
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CN
China
Prior art keywords
switch
module
assembly
switching tube
switch assembly
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Pending
Application number
CN202111375171.9A
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Chinese (zh)
Inventor
官二勇
季瑞秋
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Jingqing Digital Beijing Technology Co ltd
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Jingqing Digital Beijing Technology Co ltd
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Application filed by Jingqing Digital Beijing Technology Co ltd filed Critical Jingqing Digital Beijing Technology Co ltd
Priority to CN202111375171.9A priority Critical patent/CN114006548A/en
Publication of CN114006548A publication Critical patent/CN114006548A/en
Priority to PCT/CN2022/083045 priority patent/WO2023087595A1/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/70—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

Abstract

The invention provides a bidirectional energy storage converter, comprising: at least one leg, each leg comprising: the first end of the first switch component is connected with the positive electrode of the direct-current bus bar; the first end of the second switch component is connected with the second end of the first switch component; the first end of the third switch component is connected with the second end of the second switch component; the first end of the fourth switch component is connected with the second end of the third switch component, and the second end of the fourth switch component is connected with the negative electrode of the direct-current busbar; the first end of the fifth switch component is connected with the first end of the second switch component; the first end of the sixth switch component is connected with the second end of the fifth switch component, and the second end of the sixth switch component is connected with the first end of the fourth switch component; the first end of the resistance assembly is connected with the fifth switch assembly, the second end of the resistance assembly is connected with the sixth switch assembly, the third end of the resistance assembly is connected with the first switch assembly, and the fourth end of the resistance assembly is connected with the fourth switch assembly.

Description

Bidirectional energy storage converter
Technical Field
The invention relates to the technical field of energy storage, in particular to a bidirectional energy storage converter.
Background
In the related art, during the operation of the bidirectional energy storage converter under a low modulation ratio, namely, during high-voltage charging or discharging, the junction temperature of the diodes in the bidirectional energy storage converter is particularly high, and the temperature of the semiconductors is unbalanced, so that the converter needs to be subjected to capacity reduction.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, the invention provides a bidirectional energy storage converter.
In view of the above, the present invention provides a bidirectional energy storage converter, including: at least one leg, each leg comprising: the first end of the first switch component is connected with the positive electrode of the direct-current bus bar; the first end of the second switch component is connected with the second end of the first switch component; the first end of the third switch component is connected with the second end of the second switch component, and the first end of the third switch component is connected with the alternating current busbar; a first end of the fourth switch component is connected with a second end of the third switch component, and a second end of the fourth switch component is connected with a negative electrode of the direct-current busbar; a first end of the fifth switch component is connected with a first end of the second switch component, and a second end of the fifth switch component is connected with the 0 pole of the direct-current bus bar; a first end of the sixth switch component is connected with a second end of the fifth switch component, and a second end of the sixth switch component is connected with a first end of the fourth switch component; the first end of the resistor assembly is connected with the first end of the fifth switch assembly, the second end of the resistor assembly is connected with the second end of the sixth switch assembly, the third end of the resistor assembly is connected with the first end of the first switch assembly, and the fourth end of the resistor assembly is connected with the fourth switch assembly; the first switch assembly, the second switch assembly, the third switch assembly, the fourth switch assembly, the fifth switch assembly and the sixth switch assembly respectively comprise a switch tube and a diode.
The application defines a bidirectional energy storage converter, bidirectional energy storage converter includes at least one bridge arm, includes six switch module in every bridge arm, wherein, all include a switch tube and a diode in every switch module, and the switch tube in every switch module is parallelly connected with the diode. The first end of the first switch component and the second end of the fourth switch component are respectively connected to the positive electrode of the direct-current busbar and the negative electrode of the direct-current busbar, and the second switch component and the third switch component are connected between the first switch component and the fourth switch component. The first end of the second switch component is connected with the second end of the first switch component, the first end of the third switch component is connected with the second end of the second switch component, the second end of the third switch component is connected with the first end of the fourth switch component, and the common ends of the second switch component and the third switch component are connected with the alternating current busbar. The common end of the first switch component and the second switch component is connected with the first end of the fifth switch component, the common end of the third switch component and the fourth switch component is connected with the second end of the sixth switch component, the second end of the fifth switch component is connected with the first end of the sixth switch component, and the common ends of the fifth switch component and the sixth switch component are connected with the 0 pole of the direct-current busbar.
It is worth to be noted that, when the bidirectional energy storage converter includes a plurality of bridge arms, the common ends of the fifth switch assembly and the sixth switch assembly in each of the plurality of bridge arms are connected to the 0 pole of the dc bus bar, the first switch assembly and the fourth switch assembly are respectively connected to the positive pole and the negative pole of the dc bus bar, and the common ends of the second switch assembly and the third switch assembly are connected to the ac bus bar as the ac connection ends.
In some embodiments, the bidirectional energy storage converter comprises three bridge arms, and alternating current connection ends of the three bridge arms are respectively connected with the phase a, the phase B and the phase C of the alternating current busbar.
In the prior art, when the bidirectional energy storage converter operates under a working condition with a low modulation ratio, junction temperature of the two clamping diodes is particularly high, so that temperature imbalance of semiconductors in the bidirectional energy storage converter is caused. And if the bidirectional energy storage converter needs to continuously operate under the working condition of low modulation ratio, the bidirectional energy storage converter needs to be subjected to capacity reduction.
In the invention, two clamping diodes in the bidirectional energy storage converter are replaced by the fifth switch component and the sixth switch component, and because the fifth switch component and the sixth switch component both comprise the diodes and the switch tubes which are connected in parallel, the effect of shunting the current flowing through the fifth switch component and the sixth switch component is realized, so that the current value flowing through the fifth switch component and the sixth switch component is lower, and the problem of high junction temperature of the clamping diodes in the related technology is avoided.
And each bridge arm in the bidirectional energy storage converter is provided with a resistance assembly, each resistance assembly comprises four connecting ends, and the first end, the second end, the third end and the fourth end are respectively connected with the fifth switch assembly, the sixth switch assembly, the first switch assembly and the fourth switch assembly. The resistance assembly can carry out voltage balance to the fifth switch assembly and the sixth switch assembly of clamp, makes the voltage of the fifth switch assembly and the sixth switch assembly of clamp more balanced, and can also carry out voltage balance to first switch assembly, second switch assembly, third switch assembly and fourth switch assembly in the major loop of two-way energy storage converter, makes the voltage between the switch assembly on the major loop of two-way energy storage converter more balanced.
In some embodiments, the switching tube is a controllable switching device, and the switching tube is controlled to be periodically switched on and off under the condition that the bidirectional energy storage converter is subjected to high-voltage charging or high-voltage discharging.
In the embodiments, when the bidirectional energy storage converter is charged at high voltage or discharged at high voltage, the switching tube and the diode in the switching assembly are connected in parallel, so that the switching tube is controlled to be turned on, and the current flowing through the diode in the switching assembly is shunted, thereby reducing the current flowing through the resistor. The current flowing through the diode can be periodically shunted by controlling the periodic on-off of the switch tube, so that the diode has enough time to dissipate heat, and the problem of rapid temperature rise of the diode in the switch assembly is avoided.
In other embodiments, the switch tube is a controllable switch device, and the switch tube is controlled to continuously maintain a pass state under the condition that the bidirectional energy storage converter is charged at a high voltage or discharged at a high voltage.
In the embodiments, when the bidirectional energy storage converter is charged at high voltage or discharged at high voltage, the switching tube and the diode in the switching assembly are connected in parallel, so that the switching tube is controlled to be turned on, and the current flowing through the diode in the switching assembly is shunted, thereby reducing the current flowing through the resistor. The switch tube is controlled to continuously keep the access, so that the current flowing through the diode can be continuously shunted, and the problem of rapid temperature rise of the diode in the switch assembly is avoided.
It can be understood that the first switch component, the second switch component, the third switch component, the fourth switch component, the fifth switch component and the sixth switch component can be set to be the same hardware structure, the structure of the bidirectional energy storage converter is simplified, and the production cost of the bidirectional energy storage converter is reduced.
In addition, the bidirectional energy storage converter provided by the invention can also have the following additional technical characteristics:
in the above technical solution, the first switch assembly includes: the first end of the first switch tube is connected with the positive electrode of the direct-current bus bar; the anode of the first diode is connected with the second end of the first switch tube, and the cathode of the first diode is connected with the first end of the first switch tube; the second switch assembly includes: the first end of the second switching tube is connected with the second end of the first switching tube; the anode of the second diode is connected with the second end of the second switching tube, and the cathode of the second diode is connected with the first end of the second switching tube; the third switch assembly includes: the first end of the third switching tube is connected with the second end of the second switching tube, and the first end of the third switching tube is connected with the alternating current busbar; the anode of the third diode is connected with the second end of the third switching tube, and the cathode of the third diode is connected with the first end of the third switching tube; the fourth switch assembly includes: a first end of the fourth switching tube is connected with a second end of the third switching tube, and a second end of the fourth switching tube is connected with a negative electrode of the direct-current bus bar; the anode of the fourth diode is connected with the second end of the fourth switching tube, and the cathode of the fourth diode is connected with the first end of the fourth switching tube; the fifth switch assembly includes: a first end of the fifth switching tube is connected with a first end of the second switching tube, and a second end of the fifth switching tube is connected with the 0 pole of the direct-current bus bar; the anode of the fifth diode is connected with the second end of the fifth switching tube, and the cathode of the fifth diode is connected with the first end of the fifth switching tube; the sixth switching assembly includes: a first end of the sixth switching tube is connected with a second end of the fifth switching tube, and a second end of the sixth switching tube is connected with a first end of the fourth switching tube; and the anode of the sixth diode is connected with the second end of the sixth switching tube, and the cathode of the sixth diode is connected with the first end of the sixth switching tube.
In the technical scheme, diodes and switching tubes are arranged in the first switch assembly, the second switch assembly, the third switch assembly, the fourth switch assembly, the fifth switch assembly and the sixth switch assembly. The first switch tube, the second switch tube, the third switch tube and the fourth switch tube are connected end to end, the first end of the first switch tube is connected with the positive electrode of the direct-current busbar, and the second end of the fourth switch tube is connected with the negative electrode of the direct-current busbar. The first end of the fifth switch tube is connected to the common end of the first switch tube and the second switch tube, the second end of the sixth switch tube is connected to the common end of the third switch tube and the fourth switch tube, the common end of the fifth switch tube and the sixth switch tube is connected with the 0 pole of the direct current bus bar, and the common end of the second switch tube and the third switch tube is connected with the alternating current bus bar. And a first diode, a second diode, a third diode, a fourth diode, a fifth diode and a sixth diode are respectively connected in parallel on the first switching tube, the second switching tube, the third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching tube.
The fifth diode and the sixth diode are clamping diodes of the bidirectional energy storage converter, and the fifth switching tube and the sixth switching tube are connected in parallel to avoid the problem that the fifth diode and the sixth diode generate heat rapidly under the condition of high-voltage charging or high-voltage discharging of the bidirectional energy storage converter.
It is worth to be noted that the dc bus bar adopts a compact laminated bus bar technology with ultra-low stray inductance. The distributed inductance can be effectively reduced.
The resistance component comprises: and the first end of the first resistor is connected with the first end of the fifth switch component, and the second end of the first resistor is connected with the second end of the sixth switch component.
In this solution, the resistive component includes a first resistor.
Two ends of the first resistor are respectively connected with the first end of the fifth switch component and the second end of the sixth switch component, namely two ends of the first resistor are respectively connected with the two clamped switch components. The two clamping switch assemblies are connected with the first resistor, so that the voltages of the two clamping switch assemblies are more balanced in the operation process of the bidirectional energy storage converter.
The resistance component comprises: the first end of the second resistor is connected with the first end of the first switch component; and the first end of the third resistor is connected with the second end of the second resistor, and the second end of the third resistor is connected with the second end of the fourth switch component.
In this technical solution, the resistance component includes a second resistance and a third resistance.
The second resistor is connected with the third resistor in series, the second resistor is also connected with the first end of the first switch component, and the third resistor is also connected with the fourth switch component. Through setting up the second resistance and the third resistance that establish ties on the major loop of two-way energy storage converter, realized carrying out balanced voltage's effect through second resistance and third resistance to first switch module, second switch module, third switch module and fourth switch module on the major loop, can guarantee that two-way energy storage converter operation in-process, four switch assembly's on the major loop voltage is more balanced.
In any of the above technical solutions, each bridge arm further includes: the first end of the first capacitor is connected with the positive electrode of the direct-current bus bar; and the first end of the second capacitor is connected with the second end of the first capacitor and the 0 pole of the direct-current busbar, and the second end of the second capacitor is used for being connected with the negative pole of the direct-current busbar.
In the technical scheme, a first capacitor is arranged between the positive pole and the 0 pole of the direct-current busbar, and a second capacitor is arranged between the negative pole and the 0 pole of the direct-current busbar. The capacitors are arranged among the positive pole, the 0 pole and the negative pole of the direct-current busbar, so that the stability of direct-current voltage can be ensured.
In any of the above technical solutions, the bidirectional energy storage converter further includes: and the heat dissipation piece is arranged corresponding to at least one bridge arm.
In the technical scheme, a heat dissipation piece is further arranged in the bidirectional energy storage converter. The heat dissipation piece is arranged inside the bidirectional energy storage converter and corresponds to a bridge arm in the bidirectional energy storage converter. The electronic elements in the bridge arm of the bidirectional energy storage converter can be radiated through the radiating piece.
In some embodiments, the bridge arm is attached to the heat sink.
In the embodiments, the heat dissipation member and the bridge arm are arranged in a contact manner, so that the contact area between the electronic component on the bridge arm and the heat dissipation member can be increased, and the heat dissipation effect of the heat dissipation member on the electronic component on the bridge arm can be improved.
In other embodiments, the bridge arms are disposed on the heat sink.
In these embodiments, the circuit structure on the bridge arm of the bidirectional energy storage converter is directly connected to the heat sink, specifically, the circuit board of the circuit structure is connected to the heat sink. On the premise of improving the heat dissipation effect of the heat dissipation piece on the circuit structure, the stability of the contact between the heat dissipation piece and the bridge arm can be ensured.
It is worth mentioning that the heat dissipation member may be one or a combination of a plate heat exchanger and a heat dissipation fin. The heat dissipation member can also be selected from air-cooled or water-cooled heat dissipation components.
In any of the above technical solutions, the first switch component and the fifth switch component are first modules, the fourth switch component and the sixth switch component are second modules, and the second switch component and the third switch component are third modules; the first module, the second module and the third module are modules of the same type.
In the technical scheme, the first switch component and the fifth switch component are integrated to form a first module, the fourth switch component and the sixth switch component are integrated to form a second module, and the second switch component and the third switch component are integrated to form a third module. The two switch assemblies are integrated to be one module, so that controls occupied by a circuit structure in the bidirectional energy storage converter can be reduced. Because all be provided with two switch assembly in first module, the second module and the third module, consequently can select first module, the second module and the module of third module for the module of same model, realized reducing the purchasing cost of module to the manufacturing cost of two-way energy storage converter has been reduced.
It is worth to say that first switch module, fifth switch module, sixth switch module and fourth switch module all are connected with the direct current bus, so with first switch module and the integration of fifth switch module that are close to set up as first module to the fourth switch module and the integration of sixth switch module that are close to set up as the second module, thereby can reduce the current path between direct current bus and first module and the second module. The common end of the second switch assembly and the third switch assembly is connected with the alternating current bus, so that the second switch assembly and the third switch assembly which are close to each other are integrated to be a third module, and the current path between the alternating current bus and the second module can be reduced. According to the bidirectional energy storage converter, the first switch assembly, the second switch assembly, the third switch assembly, the fourth switch assembly, the fifth switch assembly and the sixth switch assembly are integrated in pairs, so that the production cost of the bidirectional energy storage converter is reduced, the minimum current conversion path of the bidirectional energy storage converter can be reduced, and the problem of overhigh temperature of electronic devices in the bidirectional energy storage converter is further reduced.
In any of the above technical solutions, the first module and the second module are sequentially distributed along the first direction, and the first module and the third module are sequentially distributed along the second direction.
In the technical scheme, the first module and the second module are arranged to be distributed on the radiating piece side by side, and are connected with the direct-current busbar, so that the first module and the second module are distributed on the radiating piece side by side, the distance between the first module and the direct-current busbar and the distance between the second module and the direct-current busbar are short, the third module is arranged to be distributed in a staggered mode with the first module and the second module, the situation that a circuit between the first module and the third module cannot be crossed with a circuit between the first module and the second module can be avoided, and the radiating effect of the circuit between the first module, the second module and the third module and the radiating effect of the circuit between the modules are improved on the premise that the current path between the first module and the second module and the third module is small is guaranteed.
It is worth explaining that gaps are arranged among the first module, the second module and the third module, and the heat dissipation effect among the first module, the second module and the third module is further improved.
In any of the above technical solutions, the first switch component and the second switch component are first modules, the third switch component and the fourth switch component are second modules, and the fifth switch component and the sixth switch component are third modules; the first module, the second module and the third module are modules of the same type.
In the technical scheme, a first switch component and a second switch component are integrated to form a first module, a third switch component and a fourth switch component are integrated to form a second module, and a fifth switch component and a sixth switch component are integrated to form a third module. The two switch assemblies are integrated to be one module, so that controls occupied by a circuit structure in the bidirectional energy storage converter can be reduced. Because all be provided with two switch assembly in first module, the second module and the third module, consequently can select first module, the second module and the module of third module for the module of same model, realized reducing the purchasing cost of module to the manufacturing cost of two-way energy storage converter has been reduced.
It is worth to be noted that the fifth switch component and the sixth switch component are both clamping switch components in the bidirectional energy storage converter, and the common ends of the fifth switch component and the sixth switch component are connected with the 0 pole of the direct-current busbar, so that the fifth switch component and the sixth switch component are integrated into a third module. The first switch assembly and the second switch assembly are connected with the positive pole of the direct-current busbar, and the first switch assembly and the second switch assembly are integrated into a first module. The third switch component and the fourth switch component are connected with the negative electrode of the direct-current busbar. According to the mode, the switch assemblies are integrated, the first module, the second module and the third module are connected with the direct-current busbar, so that the distance among the three modules is smaller on the basis of ensuring that lines among the three modules are not overlapped, and the occupied space of electronic elements on a bridge arm in the bidirectional energy storage converter is reduced.
In any of the above technical solutions, the first module, the second module, and the third module are sequentially distributed along the extending direction of the heat sink.
In the technical scheme, the first module, the second module and the third module are connected with the direct-current busbar, and the second module and the third module are connected with the alternating-current busbar, so that the first module, the second module and the third module can be arranged side by side. Because the radiating piece is used for radiating the first module, the second module and the third module, the size of the radiating piece is matched with the sizes of the first module, the second module and the third module, so that the occupied space of the electronic element can be reduced, and the occupied space of the radiating piece corresponding to the electronic element can also be reduced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows one of the schematic structural diagrams of the bridge arms in a bidirectional energy storage converter according to an embodiment of the invention;
fig. 2 shows a second schematic diagram of a bridge arm of a bidirectional energy storage converter according to an embodiment of the invention;
fig. 3 shows one of the schematic structural diagrams of a bidirectional energy storage converter according to an embodiment of the invention;
fig. 4 shows a third schematic diagram of a bridge arm of a bidirectional energy storage converter according to an embodiment of the invention;
fig. 5 shows a second schematic structural diagram of a bidirectional energy storage converter according to an embodiment of the invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 5 is:
the heat sink includes a 100 bridge arm, a 110 first switch component, a 112 first switch, a 114 first diode, a 120 second switch component, a 122 second switch, a 124 second diode, a 130 third switch, a 132 third switch, a 134 third diode, a 140 fourth switch component, a 142 fourth switch, a 144 fourth diode, a 150 fifth switch, a 152 fifth switch, a 154 fifth diode, a 160 sixth switch, a 162 sixth switch, a 164 sixth diode, a 170 resistor component, a 172 first resistor, a 174 second resistor, a 176 third resistor, a 182 first capacitor, a 184 second capacitor, a 192 first module, a 194 second module, a 196 third module, and a 200 heat sink.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A bidirectional energy storage converter according to some embodiments of the present invention is described below with reference to fig. 1 to 5.
As shown in fig. 1, in a first aspect of the present embodiment, a bidirectional energy storage converter is provided, which includes: at least one leg 100, wherein each leg 100 comprises: a first switching component 110, a second switching component 120, a third switching component 130, a fourth switching component 140, a fifth switching component 150, a sixth switching component 160, and a resistive component 170.
A first end of the first switch component 110 is connected with the positive electrode of the dc bus bar;
a first terminal of the second switching component 120 is connected to a second terminal of the first switching component 110;
a first end of the third switching component 130 is connected with a second end of the second switching component 120, and a first end of the third switching component 130 is connected with the alternating current bus bar;
a first end of the fourth switch component 140 is connected with a second end of the third switch component 130, and a second end of the fourth switch component 140 is connected with a negative electrode of the dc bus bar;
a first end of the fifth switch component 150 is connected with a first end of the second switch component 120, and a second end of the fifth switch component 150 is connected with the 0 pole of the dc bus bar;
a first terminal of the sixth switching element 160 is connected to a second terminal of the fifth switching element 150, and a second terminal of the sixth switching element 160 is connected to a first terminal of the fourth switching element 140;
a first terminal of the resistor assembly 170 is connected to the first terminal of the fifth switch assembly 150, a second terminal of the resistor assembly 170 is connected to the second terminal of the sixth switch assembly 160, a third terminal of the resistor assembly 170 is connected to the first terminal of the first switch assembly 110, and a fourth terminal of the resistor assembly 170 is connected to the second terminal of the fourth switch assembly 140. The first switching assembly 110, the second switching assembly 120, the third switching assembly 130, the fourth switching assembly 140, the fifth switching assembly 150 and the sixth switching assembly 160 each include a switching tube and a diode.
The application defines a bidirectional energy storage converter, which comprises at least one bridge arm 100, wherein each bridge arm 100 comprises six switch assemblies, each switch assembly comprises a switch tube and a diode, and the switch tube in each switch assembly is connected with the diode in parallel. A first end of the first switch assembly 110 and a second end of the fourth switch assembly 140 are respectively connected to a positive electrode of the dc bus bar and a negative electrode of the dc bus bar, and the second switch assembly 120 and the third switch assembly 130 are connected between the first switch assembly 110 and the fourth switch assembly 140. A first end of the second switch component 120 is connected to a second end of the first switch component 110, a first end of the third switch component 130 is connected to a second end of the second switch component 120, a second end of the third switch component 130 is connected to a first end of the fourth switch component 140, and a common end of the second switch component 120 and the third switch component 130 is connected to the ac busbar. The common terminal of the first switch element 110 and the second switch element 120 is connected to the first terminal of the fifth switch element 150, the common terminal of the third switch element 130 and the fourth switch element 140 is connected to the second terminal of the sixth switch element 160, the second terminal of the fifth switch element 150 is connected to the first terminal of the sixth switch element 160, and the common terminal of the fifth switch element 150 and the sixth switch element 160 is connected to the 0 pole of the dc bus.
It should be noted that, when the bidirectional energy storage converter includes a plurality of bridge arms 100, the common ends of the fifth switch assembly 150 and the sixth switch assembly 160 in each of the bridge arms 100 in the plurality of bridge arms 100 are connected to the 0 pole of the dc bus, the first switch assembly 110 and the fourth switch assembly 140 are respectively connected to the positive pole and the negative pole of the dc bus, and the common ends of the second switch assembly 120 and the third switch assembly 130 are both connected to the ac bus as ac connection ends.
In some embodiments, the bidirectional energy storage converter includes three bridge arms 100, and ac connection ends of the three bridge arms 100 are respectively connected to the a phase, the B phase and the C phase of the ac busbar.
In the prior art, when the bidirectional energy storage converter operates under a working condition with a low modulation ratio, junction temperature of the two clamping diodes is particularly high, so that temperature imbalance of semiconductors in the bidirectional energy storage converter is caused. And if the bidirectional energy storage converter needs to continuously operate under the working condition of low modulation ratio, the bidirectional energy storage converter needs to be subjected to capacity reduction.
In this embodiment, the diodes of the two clamps in the bidirectional energy storage converter are replaced by the fifth switching component 150 and the sixth switching component 160, and since the fifth switching component 150 and the sixth switching component 160 both include the diodes and the switching tubes connected in parallel, the effect of shunting the current flowing through the fifth switching component 150 and the sixth switching component 160 is achieved, so that the current value flowing through the fifth switching component 150 and the sixth switching component 160 is low, and the problem of high junction temperature of the clamped diodes in the related art is avoided.
Each bridge arm 100 in the bidirectional energy storage converter is provided with a resistor assembly 170, the resistor assembly 170 includes four connection ends, wherein a first end, a second end, a third end and a fourth end are respectively connected with the fifth switch assembly 150, the sixth switch assembly 160, the first switch assembly 110 and the fourth switch assembly 140. The resistor component 170 can perform voltage balancing on the clamped fifth switch component 150 and the clamped sixth switch component 160, so that the voltages of the clamped fifth switch component 150 and the clamped sixth switch component 160 are more balanced, and can also perform voltage balancing on the first switch component 110, the second switch component 120, the third switch component 130 and the fourth switch component 140 in the main loop of the bidirectional energy storage converter, so that the voltages among the switch components on the main loop of the bidirectional energy storage converter are more balanced.
In some embodiments, the switching tube is a controllable switching device, and the switching tube is controlled to be periodically switched on and off under the condition that the bidirectional energy storage converter is subjected to high-voltage charging or high-voltage discharging.
In the embodiments, when the bidirectional energy storage converter is charged at high voltage or discharged at high voltage, the switching tube and the diode in the switching assembly are connected in parallel, so that the switching tube is controlled to be turned on, and the current flowing through the diode in the switching assembly is shunted, thereby reducing the current flowing through the resistor. The current flowing through the diode can be periodically shunted by controlling the periodic on-off of the switch tube, so that the diode has enough time to dissipate heat, and the problem of rapid temperature rise of the diode in the switch assembly is avoided.
In other embodiments, the switch tube is a controllable switch device, and the switch tube is controlled to continuously maintain a pass state under the condition that the bidirectional energy storage converter is charged at a high voltage or discharged at a high voltage.
In the embodiments, when the bidirectional energy storage converter is charged at high voltage or discharged at high voltage, the switching tube and the diode in the switching assembly are connected in parallel, so that the switching tube is controlled to be turned on, and the current flowing through the diode in the switching assembly is shunted, thereby reducing the current flowing through the resistor. The switch tube is controlled to continuously keep the access, so that the current flowing through the diode can be continuously shunted, and the problem of rapid temperature rise of the diode in the switch assembly is avoided.
It can be understood that the first switch component 110, the second switch component 120, the third switch component 130, the fourth switch component 140, the fifth switch component 150 and the sixth switch component 160 may be configured as the same hardware structure, which simplifies the structure of the bidirectional energy storage converter and reduces the production cost of the bidirectional energy storage converter.
The bidirectional energy storage converter can control the charging and discharging processes of the battery, performs alternating current-direct current conversion, and can directly supply power for alternating current loads under the condition of no power grid.
As shown in fig. 1, in the above embodiment, the first switch assembly 110 includes: a first switch tube 112 and a first diode 114.
A first end of the first switch tube 112 is connected with the positive electrode of the direct current bus bar;
the anode of the first diode 114 is connected to the second end of the first switch tube 112, and the cathode of the first diode 114 is connected to the first end of the first switch tube 112;
the second switching assembly 120 includes: a second switching tube 122 and a second diode 124.
A first end of the second switch tube 122 is connected to a second end of the first switch tube 112;
the anode of the second diode 124 is connected to the second end of the second switch tube 122, and the cathode of the second diode 124 is connected to the first end of the second switch tube 122;
the third switching assembly 130 includes: a third switching tube 132 and a third diode 134.
A first end of the third switch tube 132 is connected with a second end of the second switch tube 122, and a first end of the third switch tube 132 is connected with the alternating current busbar;
the anode of the third diode 134 is connected to the second end of the third switching tube 132, and the cathode of the third diode 134 is connected to the first end of the third switching tube 132;
the fourth switching assembly 140 includes: a fourth switching tube 142 and a fourth diode 144.
A first end of the fourth switching tube 142 is connected with a second end of the third switching tube 132, and a second end of the fourth switching tube 142 is connected with a negative electrode of the dc bus bar;
the anode of the fourth diode 144 is connected to the second end of the fourth switching tube 142, and the cathode of the fourth diode 144 is connected to the first end of the fourth switching tube 142;
the fifth switching assembly 150 includes: a fifth switching tube 152 and a fifth diode 154.
A first end of the fifth switching tube 152 is connected with a first end of the second switching tube 122, and a second end of the fifth switching tube 152 is connected with the 0 pole of the dc bus bar;
the anode of the fifth diode 154 is connected to the second end of the fifth switching tube 152, and the cathode of the fifth diode 154 is connected to the first end of the fifth switching tube 152;
the sixth switching assembly 160 includes: a sixth switching tube 162 and a sixth diode 164.
A first end of the sixth switching tube 162 is connected to the second end of the fifth switching tube 152, and a second end of the sixth switching tube 162 is connected to the first end of the fourth switching tube 142;
an anode of the sixth diode 164 is connected to the second end of the sixth switching tube 162, and a cathode of the sixth diode 164 is connected to the first end of the sixth switching tube 162.
In this embodiment, diodes and switching tubes are disposed in each of the first, second, third, fourth, fifth and sixth switching assemblies 110, 120, 130, 140, 150 and 160. The first switch tube 112, the second switch tube 122, the third switch tube 132 and the fourth switch tube 142 are connected end to end, the first end of the first switch tube 112 is connected with the positive electrode of the dc bus bar, and the second end of the fourth switch tube 142 is connected with the negative electrode of the dc bus bar. A first end of the fifth switching tube 152 is connected to the common end of the first switching tube 112 and the second switching tube 122, a second end of the sixth switching tube 162 is connected to the common ends of the third switching tube 132 and the fourth switching tube 142, the common ends of the fifth switching tube 152 and the sixth switching tube 162 are connected to the 0 pole of the dc bus bar, and the common ends of the second switching tube 122 and the third switching tube 132 are connected to the ac bus bar. The first diode 114, the second diode 124, the third diode 134, the fourth diode 144, the fifth diode 154 and the sixth diode 164 are respectively connected in parallel to the first switch tube 112, the second switch tube 122, the third switch tube 132, the fourth switch tube 142, the fifth switch tube 152 and the sixth switch tube 162.
The fifth diode 154 and the sixth diode 164 are clamping diodes of the bidirectional energy storage converter, and the fifth switching tube 152 and the sixth switching tube 162 are connected in parallel to the fifth diode 154 and the sixth diode 164, so that the problem of rapid heating of the fifth diode 154 and the sixth diode 164 in the case of high-voltage charging or high-voltage discharging of the bidirectional energy storage converter is avoided.
It is worth to be noted that the dc bus bar adopts a compact laminated bus bar technology with ultra-low stray inductance. The distributed inductance can be effectively reduced.
As shown in fig. 1, in any of the above embodiments, the resistor assembly 170 further includes: a first resistor 172, a second resistor 174, and a third resistor 176.
A first end of the first resistor 172 is connected to a first end of the fifth switching element 150, and a second end of the first resistor 172 is connected to a second end of the sixth switching element 160; a first terminal of the second resistor 174 is connected to a first terminal of the first switch assembly 110; a first terminal of the third resistor 176 is connected to the second terminal of the second resistor 174, and a second terminal of the third resistor 176 is connected to the second terminal of the fourth switch assembly 140.
In this embodiment, the resistive component 170 includes a first resistor 172, a second resistor 174, and a third resistor 176.
Two ends of the first resistor 172 are respectively connected to the first end of the fifth switching element 150 and the second end of the sixth switching element 160, that is, two ends of the first resistor 172 are respectively connected to the two clamped switching elements. By connecting the two clamped switch assemblies with the first resistor 172, the voltages of the two clamped switch assemblies can be ensured to be more balanced in the operation process of the bidirectional energy storage converter.
The second resistor 174 is connected in series with a third resistor 176, the second resistor 174 is further connected to the first terminal of the first switch assembly 110, and the third resistor 176 is further connected to the fourth switch assembly 140. The second resistor 174 and the third resistor 176 which are connected in series are arranged on the main loop of the bidirectional energy storage converter, so that the effect of balancing the voltage of the first switch component 110, the second switch component 120, the third switch component 130 and the fourth switch component 140 on the main loop through the second resistor 174 and the third resistor 176 is realized, and the voltages of the four switch components on the main loop can be ensured to be more balanced in the operation process of the bidirectional energy storage converter.
As shown in fig. 1, in any of the above embodiments, each bridge leg 100 further includes: a first capacitor 182, a second capacitor 184 and a third capacitor.
The first end of the first capacitor 182 is connected to the positive electrode of the dc bus bar, the first end of the second capacitor 184 is connected to the second end of the first capacitor 182 and the 0 pole of the dc bus bar, and the second end of the second capacitor 184 is used for being connected to the negative electrode of the dc bus bar.
In this embodiment, a first capacitor 182 is disposed between the positive electrode and the 0 electrode of the dc bus bar, and a second capacitor 184 is disposed between the negative electrode and the 0 electrode of the dc bus bar. The capacitors are arranged among the positive pole, the 0 pole and the negative pole of the direct-current busbar, so that the stability of direct-current voltage can be ensured.
As shown in fig. 1, 3 and 5, in any of the above embodiments, the bidirectional energy storage converter further comprises a heat sink 200. The heat sink 200 is disposed corresponding to at least one of the bridge arms 100.
In this embodiment, a heat sink 200 is also provided in the bidirectional energy storage converter. The heat sink 200 is disposed inside the bidirectional energy storage converter, and the heat sink 200 is disposed corresponding to the bridge arm 100 in the bidirectional energy storage converter. The electronic components in the bridge arm 100 of the bidirectional energy storage converter can be radiated by the heat radiator 200.
In some embodiments, bridge arm 100 is positioned flush against heat sink 200.
In these embodiments, by providing heat sink 200 and bridge arm 100 in a contact manner, the contact area between the electronic component on bridge arm 100 and heat sink 200 can be increased, thereby increasing the heat dissipation effect of heat sink 200 on the electronic component on bridge arm 100.
In other embodiments, bridge arm 100 is disposed on heat sink 200.
In these embodiments, the circuit structure on the arm 100 of the bidirectional energy storage converter is directly connected to the heat sink 200, and specifically, the circuit board of the circuit structure is connected to the heat sink 200. On the premise of improving the heat dissipation effect of the heat dissipation member 200 on the circuit structure, the stability of the contact between the heat dissipation member 200 and the bridge arm 100 can be ensured.
It is worth mentioning that the heat sink 200 may be one or a combination of a plate heat exchanger and a heat dissipating fin. The heat sink 200 can also be selected from air-cooled or water-cooled heat sink assemblies.
As shown in fig. 1, 2, 3, 4, and 5, in any of the above embodiments, the first switch assembly 110 and the fifth switch assembly 150 are the first module 192, the fourth switch assembly 140 and the sixth switch assembly 160 are the second module 194, and the second switch assembly 120 and the third switch assembly 130 are the third module 196; the first module 192, the second module 194, and the third module 196 are of the same type.
In this embodiment, the first switching assembly 110 and the fifth switching assembly 150 are integrated as a first module 192, the fourth switching assembly 140 and the sixth switching assembly 160 are integrated as a second module 194, and the second switching assembly 120 and the third switching assembly 130 are integrated as a third module 196. The two switch assemblies are integrated to be one module, so that controls occupied by a circuit structure in the bidirectional energy storage converter can be reduced. Because two switch assemblies are arranged in the first module 192, the second module 194 and the third module 196, the first module 192, the second module 194 and the third module 196 can be selected as modules of the same model, the procurement cost of the modules is reduced, and the production cost of the bidirectional energy storage converter is reduced.
It should be noted that the first switch assembly 110, the fifth switch assembly 150, the sixth switch assembly 160 and the fourth switch assembly 140 are all connected to the dc bus, so that the first switch assembly 110 and the fifth switch assembly 150 which are close to each other are integrally provided as the first module 192, and the fourth switch assembly 140 and the sixth switch assembly 160 which are close to each other are integrally provided as the second module 194, so that the current path between the dc bus and the first module 192 and the second module 194 can be reduced. The common terminal of the second switch assembly 120 and the third switch assembly 130 is connected to the ac bus, so that the adjacent second switch assembly 120 and the third switch assembly 130 are integrally provided as the third module 196, thereby enabling a reduction in the current path between the ac bus and the second module 194. In the embodiment, the first switch component 110, the second switch component 120, the third switch component 130, the fourth switch component 140, the fifth switch component 150 and the sixth switch component 160 are integrated in pairs, so that the production cost of the bidirectional energy storage converter is reduced, the minimum commutation path of the bidirectional energy storage converter can be reduced, and the problem of overhigh temperature of electronic devices in the bidirectional energy storage converter is further reduced.
As shown in fig. 1, 2, 3, 4, and 5, in any of the above embodiments, the first module 192 and the second module 194 are sequentially distributed along a first direction, and the first module 192 and the third module 196 are sequentially distributed along a second direction.
In this embodiment, the first module 192 and the second module 194 are arranged to be distributed side by side on the heat sink 200, and because the first module 192 and the second module 194 are both connected to the dc bus bar, the first module 192 and the second module 194 are distributed side by side on the heat sink 200, so that the distance between the first module 192 and the dc bus bar and the distance between the second module 194 and the dc bus bar are relatively short, and the third module 196 is arranged to be distributed in a staggered manner with respect to the first module 192 and the second module 194, so that a circuit between the first module 192 and the second module 194 and the third module 196 is prevented from being crossed with a circuit between the first module 192 and the second module 194, and a heat dissipation effect on the first module 192, the second module 194 and the third module 196 and a circuit between the modules is improved on the premise that a current path between the first module 192, the second module 194 and the third module 196 is relatively small.
It should be noted that, gaps are provided among the first module 192, the second module 194, and the third module 196, so that the heat dissipation effect among the first module 192, the second module 194, and the third module 196 is further improved.
As shown in fig. 1, 2, 3, 4, and 5, in any of the above embodiments, the first switch assembly 110 and the second switch assembly 120 are the first module 192, the third switch assembly 130 and the fourth switch assembly 140 are the second module 194, and the fifth switch assembly 150 and the sixth switch assembly 160 are the third module 196; the first module 192, the second module 194, and the third module 196 are of the same type.
In this embodiment, the first switching assembly 110 and the second switching assembly 120 are integrated as a first module 192, the third switching assembly 130 and the fourth switching assembly 140 are integrated as a second module 194, and the fifth switching assembly 150 and the sixth switching assembly 160 are integrated as a third module 196. The two switch assemblies are integrated to be one module, so that controls occupied by a circuit structure in the bidirectional energy storage converter can be reduced. Because two switch assemblies are arranged in the first module 192, the second module 194 and the third module 196, the first module 192, the second module 194 and the third module 196 can be selected as modules of the same model, the procurement cost of the modules is reduced, and the production cost of the bidirectional energy storage converter is reduced.
It should be noted that the fifth switch component 150 and the sixth switch component 160 are both clamping switch components in the bidirectional energy storage converter, and a common terminal of the fifth switch component 150 and the sixth switch component 160 is connected to the 0 pole of the dc bus bar, so that the fifth switch component 150 and the sixth switch component 160 are integrated into the third module 196. The first switch assembly 110 and the second switch assembly 120 are connected to the positive electrode of the dc bus bar, and the first switch assembly 110 and the second switch assembly 120 are integrated into a first module 192. The third switching assembly 130 and the fourth switching assembly 140 are connected to the negative electrode of the dc bus bar. The switch assemblies are integrated according to the above manner, so that the first module 192, the second module 194 and the third module 196 are all connected with the dc bus bar, and therefore, on the basis of ensuring that lines among the three modules are not overlapped, the distance among the three modules is set to be smaller, and therefore, the occupied space of electronic elements on the bridge arm 100 in the bidirectional energy storage converter is reduced.
As shown in fig. 1, 2, 3, 4, and 5, in any of the above embodiments, the first module 192, the second module 194, and the third module 196 are sequentially distributed along the extending direction of the heat sink 200.
In this embodiment, since the first module 192, the second module 194 and the third module 196 are connected to the dc bus bar and the second module 194 and the third module 196 are connected to the ac bus bar, the first module 192, the second module 194 and the third module 196 can be arranged side by side. Since the heat sink 200 is used to dissipate heat of the first module 192, the second module 194, and the third module 196, the size of the heat sink 200 is adapted to the size of the first module 192, the second module 194, and the third module 196, and therefore, not only the occupied space of the electronic component but also the occupied space of the heat sink 200 corresponding to the electronic component can be reduced.
In the description of the present embodiment, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience of describing the present embodiment and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, cannot be construed as limiting the present embodiment; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A bi-directional energy storage converter, comprising:
at least one leg, each said leg comprising:
the first end of the first switch component is connected with the positive electrode of the direct-current busbar;
a second switch assembly, a first end of the second switch assembly being connected to a second end of the first switch assembly;
a first end of the third switch component is connected with a second end of the second switch component, and a first end of the third switch component is connected with the alternating current busbar;
a first end of the fourth switch assembly is connected with a second end of the third switch assembly, and a second end of the fourth switch assembly is connected with a negative electrode of the direct-current busbar;
a first end of the fifth switch component is connected with a first end of the second switch component, and a second end of the fifth switch component is connected with the 0 pole of the direct-current bus bar;
a first end of the sixth switch component is connected with a second end of the fifth switch component, and a second end of the sixth switch component is connected with a first end of the fourth switch component;
a first end of the resistor assembly is connected with a first end of the fifth switch assembly, a second end of the resistor assembly is connected with a second end of the sixth switch assembly, a third end of the resistor assembly is connected with the first end of the first switch assembly, and a fourth end of the resistor assembly is connected with the fourth switch assembly;
the first switch assembly, the second switch assembly, the third switch assembly, the fourth switch assembly, the fifth switch assembly and the sixth switch assembly respectively comprise a switch tube and a diode.
2. The bidirectional energy storage converter of claim 1,
the first switch assembly includes:
the first end of the first switch tube is connected with the positive electrode of the direct-current bus bar;
the anode of the first diode is connected with the second end of the first switch tube, and the cathode of the first diode is connected with the first end of the first switch tube;
the second switch assembly includes:
a second switching tube, wherein a first end of the second switching tube is connected with a second end of the first switching tube;
the anode of the second diode is connected with the second end of the second switching tube, and the cathode of the second diode is connected with the first end of the second switching tube;
the third switch assembly includes:
a first end of the third switching tube is connected with a second end of the second switching tube, and a first end of the third switching tube is connected with the alternating current busbar;
the anode of the third diode is connected with the second end of the third switching tube, and the cathode of the third diode is connected with the first end of the third switching tube;
the fourth switch assembly includes:
a first end of the fourth switching tube is connected with a second end of the third switching tube, and a second end of the fourth switching tube is connected with a negative electrode of the direct-current busbar;
the anode of the fourth diode is connected with the second end of the fourth switching tube, and the cathode of the fourth diode is connected with the first end of the fourth switching tube;
the fifth switch assembly includes:
a first end of the fifth switching tube is connected with a first end of the second switching tube, and a second end of the fifth switching tube is connected with the 0 pole of the direct-current bus bar;
a positive electrode of the fifth diode is connected with the second end of the fifth switching tube, and a negative electrode of the fifth diode is connected with the first end of the fifth switching tube;
the sixth switching assembly includes:
a first end of the sixth switching tube is connected with a second end of the fifth switching tube, and a second end of the sixth switching tube is connected with a first end of the fourth switching tube;
and the anode of the sixth diode is connected with the second end of the sixth switching tube, and the cathode of the sixth diode is connected with the first end of the sixth switching tube.
3. The bidirectional energy storage converter of claim 1, wherein said resistive assembly comprises:
and a first end of the first resistor is connected with a first end of the fifth switch component, and a second end of the first resistor is connected with a second end of the sixth switch component.
4. The bidirectional energy storage converter of claim 1, wherein said resistive assembly comprises:
a second resistor, a first end of the second resistor being connected to a first end of the first switch component;
and a first end of the third resistor is connected with a second end of the second resistor, and a second end of the third resistor is connected with a second end of the fourth switch component.
5. The bidirectional energy storage converter of claim 1, wherein each of said legs further comprises:
a first end of the first capacitor is connected with the positive electrode of the direct current bus bar;
and the first end of the second capacitor is connected with the second end of the first capacitor and the 0 pole of the direct-current busbar, and the second end of the second capacitor is used for being connected with the negative pole of the direct-current busbar.
6. The bidirectional energy storage converter according to any of claims 1 to 5, further comprising:
and the heat dissipation piece is arranged corresponding to the at least one bridge arm.
7. The bidirectional energy storage converter of claim 6,
the first switch assembly and the fifth switch assembly are first modules, the fourth switch assembly and the sixth switch assembly are second modules, and the second switch assembly and the third switch assembly are third modules;
the first module, the second module and the third module are modules of the same type.
8. The bidirectional energy storage converter of claim 7,
the first module and the second module are distributed in sequence along a first direction, and the first module and the third module are distributed in sequence along a second direction.
9. The bidirectional energy storage converter of claim 6,
the first switch assembly and the second switch assembly are first modules, the third switch assembly and the fourth switch assembly are second modules, and the fifth switch assembly and the sixth switch assembly are third modules;
the first module, the second module and the third module are modules of the same type.
10. The bidirectional energy storage converter of claim 9,
the first module, the second module and the third module are distributed in sequence along the extending direction of the heat dissipation piece.
CN202111375171.9A 2021-11-19 2021-11-19 Bidirectional energy storage converter Pending CN114006548A (en)

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CN202111375171.9A CN114006548A (en) 2021-11-19 2021-11-19 Bidirectional energy storage converter
PCT/CN2022/083045 WO2023087595A1 (en) 2021-11-19 2022-03-25 Bidirectional energy storage converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111375171.9A CN114006548A (en) 2021-11-19 2021-11-19 Bidirectional energy storage converter

Publications (1)

Publication Number Publication Date
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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023087595A1 (en) * 2021-11-19 2023-05-25 京清数电(北京)技术有限公司 Bidirectional energy storage converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023087595A1 (en) * 2021-11-19 2023-05-25 京清数电(北京)技术有限公司 Bidirectional energy storage converter

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