CN109193918A - Backup battery, drive control device and electric car - Google Patents
Backup battery, drive control device and electric car Download PDFInfo
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- CN109193918A CN109193918A CN201811063716.0A CN201811063716A CN109193918A CN 109193918 A CN109193918 A CN 109193918A CN 201811063716 A CN201811063716 A CN 201811063716A CN 109193918 A CN109193918 A CN 109193918A
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- backup battery
- input terminal
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Classifications
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- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The present invention provides a kind of backup battery, drive control device and electric car, the backup battery includes positive input terminal, negative input terminal, positive output terminal, negative output terminal, first switch tube, afterflow branch, driving unit and filter circuit；Wherein: the positive input terminal is connected to the anode of filter circuit via the first switch tube, and the negative input terminal is connected to the negative terminal of the filter circuit；The output end of the driving unit is connected to the control terminal of the first switch tube, and the driving unit is according to the positive output terminal voltage, the first drive voltage signal is exported to the control terminal of the first switch tube, maintains the voltage of the positive output terminal within a preset range.By driving unit according to the bearing power situation of backup battery, the working condition of automatic adjusument backup battery is under Status of Backups, does not consume power substantially the present invention, is conducive to circuit thermal design.
Description
Technical field
The present invention relates to Motor Control Fields, more specifically to a kind of backup battery, drive control device and electronic vapour
Vehicle.
Background technique
With the development of electric vehicle engineering, electric car is received by more and more people, correspondingly, to electric car
Safety requirements it is also higher and higher.As shown in Figure 1, high-voltage end 10 provides electric energy for motor operation in existing electric car,
Specifically, the high voltage direct current that high-voltage end 10 provides is converted to low-voltage DC and is low pressure by high power DC translation circuit 11
Battery 12 charges, and electric machine controller 15, lower bridge arm driving power 13, upper bridge arm driving power 14 are powered by A-battery 12, electricity
The feedback voltage and feedback current that machine controller 15 is obtained according to motor feedback circuit 18 from inverter 17 generate drive control letter
Number, driving circuit 16 is exported according to above-mentioned driving control signal and lower bridge arm driving power 13, upper bridge arm driving power 14
Driving voltage generates driving pulse, controls inverter 17 for the high voltage direct current that high-voltage end 10 exports and is converted to alternating current, to drive
Dynamic motor 2 is run.
It breaks down in electric car, when A-battery power supply power down, to guarantee safety, it is still desirable to guarantee
Actively short circuit is carried out with quick shutdown for the low-voltage power supply of motor control, and to motor 2, improves vehicle safety and protection vapour
Vehicle controller.For realize fault condition under quick shutdown, at present mainly by provide all the way backup battery 19 come provide actively
The energy of short-circuit protection, as shown in Figure 1.Above-mentioned backup battery 19 directly exports high level and arrives when electric car breaks down
The switching tube of the control terminal of switching tube in inverter 17, the upper bridge or lower bridge that make inverter 17 is placed in normally opened state；In addition,
The output of backup battery 19 can also be supplied to driving circuit 16, make the upper bridge of inverter 17 or opening for lower bridge by driving circuit 16
It closes pipe and is in normally opened state.
As shown in Fig. 2, above-mentioned backup battery 19 takes electricity from the high-tension battery 101 of high-voltage end 10, realize high pressure to low pressure
Electric energy conversion.Currently, above-mentioned electric energy conversion is mainly realized with isolated power supply and linear voltage-stabilizing circuit.Backup battery 19 is using isolation
Flyback sourse realizes the conversion between high pressure and low pressure by transformer voltage ratio.However, the input due to the backup battery 19 is high
Press higher, generally have 500V or more, may bring two more obvious problems, 1) switching tube required for flyback sourse
Q10 stress is high, loss is big, automotive grade parts selection is difficult, 2) transformer turn is more, and it is big to occupy volume, at high cost.Such as Fig. 3 institute
Show, when backup battery 19 is using linear voltage-stabilizing circuit, it is poor that input and output voltage is undertaken by resistance R pressure drop, although the electricity
Line structure is simple, but big (its loss is directly proportional to output power) is lost.Due to the building ring of electric automobile driving controller
Border temperature is especially high, and the heat resisting temperature of device is limited, therefore the loss that device allows is restricted, that is to say, that linear voltage stabilization
The output power of circuit is limited.Moreover, switching tube Q20 (or triode) stress in linear voltage-stabilizing circuit is also required to be greater than
The maximum voltage of high-tension battery 101.With the development of electric car, the voltage of high-tension battery 101 is at the trend constantly risen, greatly
Bar vehicle high-tension battery has reached 800V or more, and the automotive grade switching tube stress of business application is limited at present, at present highest
Optional ability 1000V.Therefore, above-mentioned existing scheme is all unable to satisfy the demand of higher voltage application.
Summary of the invention
The technical problem to be solved in the present invention is that it is at high cost for above-mentioned backup battery, volume is big, circuit is complicated, choosing
Type is difficult and is unable to satisfy the problem of higher voltage application requires, and provides the new backup battery of one kind, drive control device
And electric car.
The technical solution that the present invention solves above-mentioned technical problem is to provide a kind of backup battery, and the backup battery includes
Positive input terminal, negative input terminal, positive output terminal, negative output terminal, first switch tube, afterflow branch, driving unit and
Filter circuit, in which: the positive input terminal is connected to the anode of filter circuit, the negative input via the first switch tube
Terminal is connected to the negative terminal of the filter circuit；The first end of the afterflow branch is connected with the filter circuit negative terminal, described
The second end of afterflow branch is connected with the anode of the filter circuit；The positive output terminal is being connected to the filter circuit just
End, the negative output terminal are connected to the negative terminal of the filter circuit；The output end of the driving unit is connected to described first
The control terminal of switching tube, and the driving unit is according to the positive output terminal voltage, to the control terminal of the first switch tube
The first drive voltage signal is exported, maintains the voltage of the positive output terminal within a preset range.
Preferably, the backup battery includes passive potential-divider network and current source, the positive input terminal with it is described passive
The connection of potential-divider network anode, the negative input terminal are connect with the passive potential-divider network negative terminal, the passive potential-divider network
Output end connects the input terminal of the first switch tube；The current source is connected to the passive potential-divider network and to described passive
Potential-divider network carries out energy allotment.
Preferably, the current source includes resistance；The current source is connected to the positive input terminal and passive point described
Between the output end of pressure network network or the current source is connected to the output end and the negative output terminal of the passive potential-divider network
Between son.
Preferably, the passive potential-divider network includes multiple is connected between the positive input terminal and negative input terminal
Multiple first sub- capacitors, the output plus terminal structure of a first sub- capacitor in the multiple first sub- capacitor middle position
At the output end of the passive potential-divider network；Or the passive potential-divider network includes being connected to positive input terminal and negative input end
The bus capacitor of high-voltage end between son, the bus capacitor are composed in series by the multiple second sub- capacitors, in the multiple the
The output plus terminal of one of two sub- capacitor middle positions, the second sub- capacitor constitutes the output end of the passive potential-divider network.
Preferably, the driving unit includes level-one control circuit and Two-stage control circuit；Wherein: the level-one control electricity
The output end on road is connected to the first input end of the Two-stage control circuit and to the Two-stage control circuit output frequency and accounting for
Sky is than constant square-wave signal；Second input terminal of the Two-stage control circuit is connected to the positive output terminal, and according to institute
The voltage of positive output terminal and the square-wave signal of the first input end are stated to described in the output of the control terminal of the first switch tube
First drive voltage signal.
Preferably, described when the voltage of the second input terminal of the Two-stage control circuit is increased to the first predeterminated voltage
First drive voltage signal of Two-stage control circuit output is the level for disconnecting the first switch tube；In the second level
When the voltage drop of second input terminal of control circuit is as low as the second predeterminated voltage, the first driving of the Two-stage control circuit output
The waveform of voltage signal is identical as the waveform of the square-wave signal of the first input end, and second predeterminated voltage is less than described
First predeterminated voltage.
Preferably, the difference of first predeterminated voltage and the second predeterminated voltage is less than 2V, and first predeterminated voltage
Less than lower bridge arm driving power voltage.
Preferably, the afterflow branch includes diode, and the anode of the diode is connected to the filter circuit
Negative terminal, the diode cathode be connected to the anode of the filter circuit；Alternatively, the afterflow branch includes second switch
Pipe, and the control terminal of the second switch is connected to the driving unit, the driving unit is according to the positive output terminal
Voltage exports the second drive voltage signal to the control terminal of the second switch, and increases in the voltage of the positive output terminal
When to the first predeterminated voltage, the waveform of second drive voltage signal is identical as the waveform of first drive voltage signal,
When the voltage drop of the positive output terminal is as low as the second predeterminated voltage, the phase of second drive voltage signal and described the
The opposite in phase of one drive voltage signal.
The present invention also provides a kind of drive control devices, including backup battery as described above.
The present invention also provides a kind of electric cars, including drive control device as described above.
Backup battery, drive control device and electric car of the invention has following technical effect: passing through driving unit,
One switching tube and continuous current circuit, can according to the bearing power situation of backup battery, the working condition of automatic adjusument backup battery,
It is under Status of Backups, does not consume power substantially, be conducive to circuit thermal design.Also, the present invention passes through current source and drive
Moving cell makes the output plus terminal voltage of passive potential-divider network be consistently higher than the positive output terminal voltage of backup battery, and makes first
The voltage stress of switching tube maintains a lesser value, is conducive to the answering suitable for higher voltage under same switch pipe type selecting
Use occasion.
The configuration of the present invention is simple can omit the isolating transformer in existing Switching Power Supply scheme, reduce costs, simplify
Circuit, and can have higher output power ability compared to linear power supply.Moreover, the first switch tube in the present invention is answered
Power can choose more inexpensive device in identical high pressure occasion far below switching device in existing scheme, identical resistance to selecting
It may adapt to the application of higher voltage when voltage device, conducive to type selecting, reduce cost and solve the problems, such as that circuit overheats.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of drive control device in existing electric car；
Fig. 2 is the schematic diagram of existing backup battery；
Fig. 3 is the schematic diagram of another existing backup battery；
Fig. 4 is the schematic diagram of backup battery first embodiment of the present invention；
Fig. 5 is the schematic diagram of backup battery second embodiment of the present invention；
Fig. 6 is the schematic diagram of passive potential-divider network and current source embodiment in backup battery of the present invention；
Fig. 7 is the schematic diagram of another embodiment of passive potential-divider network and current source in backup battery of the present invention；
Fig. 8 be square-wave signal in backup battery of the present invention, the first drive voltage signal and positive output terminal voltage wave
Shape figure；
Fig. 9 is the schematic diagram of backup battery 3rd embodiment of the present invention；
Figure 10 is square-wave signal in backup battery of the present invention, the first drive voltage signal, the second drive voltage signal and just
The waveform diagram of the voltage of output terminal.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in figure 4, being the schematic diagram of backup battery embodiment of the present invention, which can be applied to drive control
Device, and at drive control device failure (such as A-battery failure), the semiconductor switch pipe to driving circuit or inverter is defeated
Driving voltage out simultaneously turns on the lower bridge arm switching tube of inverter, to carry out actively short circuit to motor, realizes quick shutdown.
The backup battery of the present embodiment includes positive input terminal 41, negative input terminal 42, positive output terminal 43, negative output terminal 44,
One switching tube 45, afterflow branch 48, filter circuit 47 and driving unit 46, above-mentioned positive input terminal 41 is via first switch tube
45 are connected to the anode of filter circuit 47, and negative input terminal 42 is connected to the negative terminal of filter circuit 47；The first of afterflow branch 48
End is connected with 47 negative terminal of filter circuit, and the second end of the afterflow branch 48 is connected with the anode of filter circuit 47；Positive output end
Son 43 is connected to the anode of filter circuit 47, negative output terminal 44 is connected to the negative terminal of filter circuit 47；Driving unit 46 it is defeated
Outlet is connected to the control terminal of first switch tube 45, and driving unit 46 according to the voltage of positive output terminal 43 to first switch tube
45 control terminal exports the first drive voltage signal, makes first switch tube 45 with corresponded manner on-off, with to positive input terminal 41,
The DC voltage decompression processing that negative input terminal 42 inputs, so that the voltage of positive output terminal 43 be made to maintain within a preset range
(preset range is less than the voltage of driving power, and is greater than the conducting voltage of semiconductor switch pipe in inverter).
Above-mentioned filter circuit 47 is used for filtering clutter, improves the quality of voltage of backup battery output end.Specifically, the filtering
LC filtering can be used in circuit 47, i.e. the filter circuit 47 includes being connected to positive output terminal, the capacitor of negative output terminal and company
Connect the inductance between first switch tube S1 and positive output terminal.Afterflow branch 48 then can make the output voltage of backup battery steady
Variation.
Above-mentioned backup battery from high-tension battery take electricity (i.e. above-mentioned positive input terminal 41 and negative input terminal 42 may be connected to height
The both ends of piezoelectric battery), the energy of semiconductor switch pipe in conduction inverter is provided, realizes that low-pressure system power down or driving power are fallen
Under the fault conditions such as electricity, the automatic function of realizing actively short circuit.In the case where drive control device operates normally, half in inverter
The energy of conductor switching tube work is provided by driving power, and backup battery will not influence inversion for the loss work of very little
The normal work of device；Work as failure, when driving power cisco unity malfunction, backup battery will replace driving power, provide and lead
The energy of semiconductor switch pipe in logical inverter, protection drive control device safety.
As shown in figure 5, being the schematic diagram of backup battery second embodiment of the present invention.The backup battery 4 of the present embodiment in addition to
Including positive input terminal, negative input terminal, positive output terminal, negative output terminal, first switch tube S1, driving unit 46, afterflow
It further include passive potential-divider network 491, current source 492 outside branch and filter circuit 47.Above-mentioned passive potential-divider network 491 connects
Between positive input terminal, negative input terminal, the input terminal of first switch tube S1 is connected to the output of passive potential-divider network 491
End.
The high voltage direct current that high-tension battery inputs can be done decompression processing by above-mentioned passive potential-divider network 491, thus reduction pair
Other devices answer force request in backup battery 4, and above-mentioned current source 492 is then for carrying out energy to passive potential-divider network 491
Allotment, guarantees that the output voltage of passive potential-divider network 491 is consistently higher than the output voltage of backup battery.
Specifically, as shown in fig. 6, above-mentioned passive potential-divider network 491 may include it is multiple be connected in series in positive input terminal and
Multiple first sub- capacitor C1, C2 ... Cn (n is positive integer) between negative input terminal, and it is in the multiple first sub- capacitor interpositions
The output plus terminal for the first sub- capacitor set constitutes the output end of passive potential-divider network 491.Since late-class circuit is parallel to son
The output end of capacitor, when backup battery work (there is output electric current), the electricity of the sub- capacitor of first in parallel with late-class circuit
Pressure meeting dramatic decrease, or even become zero.To avoid this situation, parallel-current source 492 is needed, passive potential-divider network 491 is carried out
Energy allotment.The above-mentioned most simple realization of current source 492 form, that is, resistance, and the current source 492 be attached to positive input terminal and
Between the output end of passive potential-divider network 491 or the current source 492 be also attached to passive 491 output end of potential-divider network and
Between negative output terminal.Above-mentioned current source 492 can also be made of multiple resistance R1, R2 ... Rn (n is positive integer), multiple resistance
R1, R2 ... Rn are connected in the both ends of each first sub- capacitor in parallel respectively, can limit current source 492 by the resistance value selection of resistance
Size of current.
In addition, to simplify circuit, as shown in fig. 7, above-mentioned passive potential-divider network 491 can also borrow the bus at high-tension battery end
Capacitor improves pressure voltage, has the second sub- capacitor of multiple series connections inside bus capacitor at this time, can select as needed
The anode of wherein the second sub- capacitor in the multiple second sub- capacitor middle position (non-the top) is selected as passive partial pressure net
The output plus terminal of network 491.
Particularly, to make the output voltage of backup battery 4 not influence the normal operation of drive control device, the backup battery 4
Output voltage (i.e. the voltage Vo of positive output terminal) be less than drive control device in lower bridge arm driving power voltage (work as backup battery
When 5 output end is connected to the lower bridge arm power supply terminal of driving circuit or is connected to the lower bridge arm semiconductor switch pipe of inverter),
And the output voltage of backup battery 4 is greater than the conducting voltage that semiconductor switch pipe is corresponded in inverter.Specifically, backup battery 4
Output voltage and drive control device in driving power voltage difference preferably between 1~2V.
In above-mentioned backup battery, driving unit 46 specifically may include level-one control circuit 461 and Two-stage control circuit
462.Wherein the output end of level-one control circuit 461 is connected to the first input end of Two-stage control circuit 462 and to Two-stage control
462 output frequency of circuit and the constant square-wave signal V of duty ratiodr1(frequency and duty ratio of the square-wave signal can mention as needed
Preceding setting).Second input terminal of Two-stage control circuit 462 is connected to positive output terminal, to obtain the voltage of the positive output terminal
Vo.The Two-stage control circuit 462 generates the first driving electricity according to the voltage of the second input terminal and the square-wave signal of first input end
Press signal Vdr2, and by first drive voltage signal Vdr2It is output to the control terminal of first switch tube S1.
Specifically, in conjunction with Fig. 8, the second input terminal voltage drop as low as the second predeterminated voltage Vset2When, Two-stage control electricity
The first drive voltage signal V that road 462 exportsdr2Waveform and first input end square-wave signal Vdr1Waveform identical (i.e.
The square-wave signal V of two input terminalsdr2With the first drive voltage signal Vdr1Frequency and duty ratio difference it is identical)；In the second input
The voltage at end is increased to the first predeterminated voltage Vset1(the first predeterminated voltage Vset1Greater than the second predeterminated voltage Vset2) when, second level control
The first drive voltage signal V that circuit 462 processed exportsdr2Level to disconnect first switch tube S1 (such as works as first switch tube
When S1 high level is connected, the first drive voltage signal V at this timedr2For low level).In this way, when drive control device plays machine, it is standby
Part power output end voltage Vo is zero, the first drive voltage signal V that Two-stage control circuit 462 exports at this timedr2It is controlled with level-one
The square-wave signal V that circuit 461 exportsdr1Synchronous, backup battery output end voltage Vo rises；As backup battery output end voltage Vo
When rising reaches the first predeterminated voltage Vset1, the first drive voltage signal V of the output of Two-stage control circuit 462dr2Perseverance is low electricity
It is flat, so that backup battery output end voltage Vo declines；When backup battery output end voltage Vo decline reaches the second predeterminated voltage
Vset2When, the first drive voltage signal V of the output of Two-stage control circuit 462dr2The side exported again with level-one control circuit 461
Wave signal Vdr1Synchronous, backup battery output end voltage Vo rises again.Backup battery output end voltage Vo is controlled in as a result,
Target voltage [Vset2,Vset1] in range.
Also, in order to enable backup battery 4 quickly to provide energy into safe condition for electric machine controller, above-mentioned
One predeterminated voltage Vset1With the second predeterminated voltage Vset1Difference be less than 2V, such as can be 0.5~1V.
Diode D1 specifically can be used in above-mentioned afterflow branch, and the cathode of diode D1 is being connected to filter circuit 47 just
End, and the anode of diode D1 is connected to the negative terminal of filter circuit 47.The afterflow branch structure is simple, and is not necessarily to control logic
Control afterflow process.
As shown in figure 9, in another embodiment of the invention, second switch S2 can also be used instead of above-mentioned in afterflow branch
Diode D1, and the control terminal of second switch S2 is connected to driving unit, such as Two-stage control circuit 462.When second
When switching tube S2 uses the switching device with first switch tube S1 same type, Two-stage control circuit 462 is to second switch S2's
Control terminal exports the second drive voltage signal Vdr3, and in the first drive voltage signal Vdr2When for low level, the second driving voltage
Signal Vdr3For high level), the first predeterminated voltage V is increased in the voltage Vo of positive output terminalset1When, the second driving voltage letter
Number Vdr3Waveform and the first drive voltage signal Vdr2Waveform it is identical (such as permanent be low level)；In the voltage of positive output terminal
Vo is reduced to the second predeterminated voltage Vset2When, the second drive voltage signal Vdr3Phase and the first drive voltage signal Vdr2Phase
Position is opposite (i.e. in the first drive voltage signal Vdr2When for high level, the second drive voltage signal Vdr3For low level；It is driven first
Dynamic voltage signal Vdr2When for low level, the second drive voltage signal Vdr3For high level), above-mentioned second predeterminated voltage Vset2It is less than
First predeterminated voltage Vset2.By this way, the input current of filter circuit 47 can be made continuous always, and be advantageously implemented
The Sofe Switch of first switch tube S1 and second switch S2 reduce switching loss, are conducive to circuit thermal design.
The present invention also provides a kind of drive control device, which can be applied to electric car, realize electric device vehicle
Middle drive and control of electric machine, the drive control device of the present embodiment include backup battery as described above, and are existed by the backup battery
When driving power or low-pressure system failure, driving voltage is provided for the semiconductor switch pipe in inverter.
The present invention also provides a kind of electric cars, including drive control device as described above.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (10)
1. a kind of backup battery, which is characterized in that the backup battery includes positive input terminal, negative input terminal, positive output end
Son, negative output terminal, first switch tube, afterflow branch, driving unit and filter circuit, in which: the positive input terminal warp
The anode of filter circuit is connected to by the first switch tube, the negative input terminal is connected to the negative terminal of the filter circuit；
The first end of the afterflow branch is connected with the filter circuit negative terminal, the second end of the afterflow branch and the filter circuit
Anode be connected；The positive output terminal is connected to the anode of the filter circuit, the negative output terminal is connected to the filter
The negative terminal of wave circuit；The output end of the driving unit is connected to the control terminal of the first switch tube, and the driving unit
According to the positive output terminal voltage, export the first drive voltage signal to the control terminal of the first switch tube, make it is described just
The voltage of output terminal maintains within a preset range.
2. backup battery according to claim 1, which is characterized in that the backup battery includes passive potential-divider network and electricity
Stream source, the positive input terminal are connect with the passive potential-divider network anode, the negative input terminal and the passive partial pressure net
The connection of network negative terminal, the output end of the passive potential-divider network connect the input terminal of the first switch tube；The current source connection
Energy allotment is carried out to the passive potential-divider network and to the passive potential-divider network.
3. the backup battery according to claim 2, which is characterized in that the current source includes resistance；The current source
It is connected between the positive input terminal and the output end of the passive potential-divider network or the current source is connected to the nothing
Between the output end of source potential-divider network and the negative output terminal.
4. backup battery according to claim 2, which is characterized in that the passive potential-divider network includes multiple being connected on institute
The multiple first sub- capacitors between positive input terminal and negative input terminal are stated, in the multiple first sub- capacitor middle position
The output plus terminal of one first sub- capacitor constitutes the output end of the passive potential-divider network；Or the passive potential-divider network
Bus capacitor including the high-voltage end being connected between positive input terminal and negative input terminal, the bus capacitor is by multiple second
Sub- capacitor is composed in series, the output plus terminal structure of one in the multiple second sub- capacitor middle position, the second sub- capacitor
At the output end of the passive potential-divider network.
5. backup battery according to claim 1, which is characterized in that the driving unit includes level-one control circuit and two
Grade control circuit；Wherein: the output end of the level-one control circuit is connected to the first input end of the Two-stage control circuit simultaneously
The square-wave signal constant to the Two-stage control circuit output frequency and duty ratio；Second input terminal of the Two-stage control circuit
It is connected to the positive output terminal, and according to the square-wave signal of the voltage of the positive output terminal and the first input end to institute
The control terminal for stating first switch tube exports first drive voltage signal.
6. backup battery according to claim 5, which is characterized in that in the second input terminal of the Two-stage control circuit
When voltage is increased to the first predeterminated voltage, first drive voltage signal of the Two-stage control circuit output is to make described the
The level that one switching tube disconnects；The Two-stage control circuit the second input terminal voltage drop as low as the second predeterminated voltage when,
The waveform of the square-wave signal of the waveform and first input end of first drive voltage signal of the Two-stage control circuit output
It is identical, and second predeterminated voltage is less than first predeterminated voltage.
7. backup battery according to claim 6, which is characterized in that first predeterminated voltage and the second predeterminated voltage
Difference is less than 2V, and first predeterminated voltage is less than lower bridge arm driving power voltage.
8. backup battery according to claim 1, which is characterized in that the afterflow branch includes diode, and described two
The anode of pole pipe is connected to the negative terminal of the filter circuit, the cathode of the diode is connected to the anode of the filter circuit；
Alternatively, the afterflow branch includes second switch, and the control terminal of the second switch is connected to the driving list
Member, the driving unit export the second driving voltage to the control terminal of the second switch according to the positive output terminal voltage
Signal, and when the voltage of the positive output terminal is increased to the first predeterminated voltage, the waveform of second drive voltage signal
It is identical as the waveform of first drive voltage signal, when the voltage drop of the positive output terminal is as low as the second predeterminated voltage,
The opposite in phase of the phase of second drive voltage signal and first drive voltage signal.
9. a kind of drive control device, which is characterized in that including backup battery such as of any of claims 1-8.
10. a kind of electric car, which is characterized in that including drive control device as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811063716.0A CN109193918B (en) | 2018-09-12 | 2018-09-12 | Backup power supply, driving controller and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811063716.0A CN109193918B (en) | 2018-09-12 | 2018-09-12 | Backup power supply, driving controller and electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109193918A true CN109193918A (en) | 2019-01-11 |
| CN109193918B CN109193918B (en) | 2022-07-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811063716.0A Active CN109193918B (en) | 2018-09-12 | 2018-09-12 | Backup power supply, driving controller and electric automobile |
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| CN113381633A (en) * | 2020-02-24 | 2021-09-10 | 株洲中车时代电气股份有限公司 | High-voltage electricity taking device for motor controller of electric automobile and motor controller |
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| Publication number | Publication date |
|---|---|
| CN109193918B (en) | 2022-07-26 |
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Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan United Power System Co.,Ltd. Address before: 215000 52 tianedang Road, Yuexi Town, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. |
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