CN109274286A - Applied to the vehicle-mounted two-way inversion system on pure electric automobile - Google Patents
Applied to the vehicle-mounted two-way inversion system on pure electric automobile Download PDFInfo
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- CN109274286A CN109274286A CN201811161533.2A CN201811161533A CN109274286A CN 109274286 A CN109274286 A CN 109274286A CN 201811161533 A CN201811161533 A CN 201811161533A CN 109274286 A CN109274286 A CN 109274286A
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- 230000009286 beneficial effect Effects 0.000 description 2
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Classifications
-
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
Abstract
The present invention discloses a kind of vehicle-mounted two-way inversion system applied on pure electric automobile, including charging unit, two-way inverter, battery management module and power battery pack, the output end of the charging unit is electrically connected with the first end of the first end of the two-way inverter and the battery management module respectively, the first end of the power battery pack is electrically connected with the second end of the battery management module, and the second end of the two-way inverter is electrically connected with the third end of the battery management module.The present invention can become one vehicle-mounted DC/AC and AC/DC structure, reduce the assembly and cost of component, the integration degree for improving electric car optimizes the installation space of electric car and conveniently installs to electric car, reduces the installation procedure of electric car.
Description
Technical field
The present invention relates to electric car fields, more particularly to a kind of applied to vehicle-mounted two-way inverse on pure electric automobile
Change system.
Background technique
However, on existing pure electric automobile, in general, when needing electric vehicle to be powered, in pure electric vehicle vehicle
One DC/AC inverter of upper installation, externally load provides exchange 220AC or 380AC power supply；When needs charge the battery
When, in the separately installed AC/DC Vehicular charger of pure electric vehicle, the structure for the electric vehicle for being then in this way is increasingly complex, first device
Part is more, and integration degree is low, increases the installation space on electric vehicle and increases the difficulty of installation.
Summary of the invention
The purpose of the present invention is overcoming shortcoming in the prior art, provide a kind of applied on pure electric automobile
Vehicle-mounted two-way inversion system, can become one vehicle-mounted DC/AC and AC/DC structure, reduce component assembly and
Cost improves the integration degree of electric car, optimizes the installation space of electric car and conveniently carries out to electric car
Installation, reduces the installation procedure of electric car.
The purpose of the present invention is achieved through the following technical solutions:
A kind of vehicle-mounted two-way inversion system applied on pure electric automobile, comprising: charging unit, two-way inverter,
Battery management module and power battery pack,
The output end of the charging unit respectively with the first end and the battery management module of the two-way inverter
First end electrical connection, the first end of the power battery pack is electrically connected with the second end of the battery management module, described pair
The third end of second end and the battery management module to inverter is electrically connected；
The input terminal of the charging unit is also used to be electrically connected with external electrical network, the third end of the two-way inverter
It is also used to be electrically connected with external loading；
The charging unit includes AC charger and DC charger；The input terminal of the AC charger with it is described
External electrical network electrical connection, the output end of the AC charger are electrically connected with the first end of the two-way inverter, described straight
The input terminal of current charge device is electrically connected with the external electrical network, the output end of the DC charger and the battery management mould
The first end of block is electrically connected.
The AC charger is alternating-current charging pile in one of the embodiments,.
The DC charger is direct-current charging post in one of the embodiments,.
The power battery pack includes multiple lists connected in series and/or parallel in one of the embodiments,
Body battery.
The two-way inverter includes AC/DC module and DC/AC module, the AC/ in one of the embodiments,
DC module and DC/AC module electrical connection, also, the AC/DC module is also electrically connected with the battery management module, institute
DC/AC module is stated also to be electrically connected with the external loading.
The DC charger includes filter unit and rectification unit, the filter unit in one of the embodiments,
Input terminal be electrically connected with the external electrical network, the output end of the filter unit and the input terminal of the rectification unit are electrically connected
It connects, the output end of the rectification unit is electrically connected with the input terminal of the battery management module.
The filter unit includes fuse F1, thermistor NTC1 and capacitor C1, institute in one of the embodiments,
The first end for stating fuse F1 is electrically connected with the external electrical network, and the second end of the fuse F1 is electric with the temperature-sensitive respectively
Hinder one end of NTC1 and one end electrical connection of the capacitor C1, the other end ground connection of the capacitor C1, the thermistor NTC1
The other end be electrically connected with the rectification unit.
The rectification unit includes the rectification that the diode D being connected in series by 4 is formed in one of the embodiments,
Bridge, wherein one end of the rectifier bridge is electrically connected with the filter unit, the other end of the rectifier bridge and the cell tube
Manage module electrical connection.
The AC charger includes electromagnetism interference unit in one of the embodiments, the electromagnetism interference list
One end of member is electrically connected with the external electrical network, the other end of the electromagnetism interference unit and the two-way inverter
Input terminal electrical connection.
The electromagnetism interference unit includes fuse F2, resistance R1, resistance R2 and electricity in one of the embodiments,
Feel L1, one end of the fuse F2 is electrically connected with the first end of the first end of the resistance R1 and the inductance L1 respectively, institute
The second end for stating resistance R1 is grounded after the resistance R2, and the second end of the inductance L1 is defeated with the two-way inverter
Enter end electrical connection.
The present invention compared with the prior art the advantages of and have the beneficial effect that:
The present invention is a kind of vehicle-mounted two-way inversion system applied on pure electric automobile, is filled by the way that two-way inversion is arranged
It sets, battery management module and power battery pack, can become one vehicle-mounted DC/AC and AC/DC structure, reduce member
The assembly and cost of device, improve the integration degree of electric car, optimize the installation space and convenience pair of electric car
Electric car is installed, and the installation procedure of electric car is reduced.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is that the structure of the vehicle-mounted two-way inversion system being applied on pure electric automobile of an embodiment of the present invention is shown
It is intended to；
Fig. 2 is the circuit diagram of DC charger shown in FIG. 1；
Fig. 3 is the circuit diagram of AC charger shown in FIG. 1；
Fig. 4 is the circuit diagram of power conversion circuit shown in FIG. 1；
Fig. 5 is the circuit diagram of overvoltage crowbar shown in FIG. 1；
Fig. 6 is the circuit diagram of over-current detection circuit shown in FIG. 1；
Fig. 7 is the circuit diagram of DC/DC converter circuit shown in FIG. 1.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to this
Embodiment described in text.On the contrary, the purpose of providing these embodiments is that making to the disclosure understanding
It is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff it is identical.Term as used herein in the specification of the present invention is intended merely to retouch
State the purpose of specific embodiment, it is not intended that in the limitation present invention.Term " and or " used herein includes one
Or any and all combinations of multiple relevant listed items.
Referring to Fig. 1, a kind of vehicle-mounted two-way inversion system applied on pure electric automobile, comprising: charging unit 100,
Two-way inverter 200, battery management module 300 and power battery pack 400, it should be noted that the charging unit 100
For charging for power battery pack；The two-way inverter 200 is power electric for converting alternating current to direct current
The charging of pond group, also or by the converting direct-current power into alternating-current power of power battery pack, is powered for external loading；The battery
Management module 300 is that external loading is supplied for connecting power battery pack and two-way inverter, the power battery pack
Electricity.
Referring to Fig. 1, the output end of the charging unit 100 respectively with the first end of the two-way inverter 200 and
The first end of the battery management module 300 is electrically connected, the first end of the power battery pack 400 and the battery management mould
The second end of block 300 is electrically connected, the second end of the two-way inverter 200 and the third end of the battery management module 300
Electrical connection；The input terminal of the charging unit 100 is also used to be electrically connected with external electrical network, and the of the two-way inverter 200
Three ends are also used to be electrically connected with external loading.
Referring to Fig. 1, the charging unit 100 includes AC charger 110 and DC charger 120；The exchange is filled
The input terminal of electric appliance 110 is electrically connected with the external electrical network, the output end of the AC charger 110 and the two-way inversion
The first end of device 200 is electrically connected, and the input terminal of the DC charger 120 is electrically connected with the external electrical network, the direct current
The output end of charger 120 is electrically connected with the first end of the battery management module 300.
When work: electric car is charged using electric main, is converted alternating current to directly by two-way inverter
Then galvanic electricity is controlled by battery management module and high voltage power distribution, is charged to the power battery pack on vehicle；Electric car
On power battery pack need to pass through externally when be powered high voltage power distribution and battery management module control provide it is double
To inverter direct-current power supply, then 220VAC or 380VAC is exported, external loading is powered to realize.In this way,
Can become one vehicle-mounted DC/AC and AC/DC structure, reduce the assembly and cost of component, improve electronic vapour
The integration degree of vehicle optimizes the installation space of electric car and conveniently installs to electric car, reduces electronic vapour
The installation procedure of vehicle.
It should be noted that the AC charger is alternating-current charging pile.The DC charger is direct-current charging post.
The power battery pack includes multiple single batteries connected in series and/or parallel.So as to improve the steady of system
Qualitative and reliability.
It should be noted that the two-way inverter includes AC/DC module and DC/AC module, the AC/DC module
It is electrically connected with the DC/AC module, also, the AC/DC module is also electrically connected with the battery management module, the DC/AC
Module is also electrically connected with the external loading.The AC/DC module is used to the alternating current of power grid being converted into direct current, and gives
Power battery pack charges；The DC/AC module is used for converting direct-current power into alternating-current power, then, is carried out for external loading
Power supply.
It should be noted that the DC charger includes filter unit and rectification unit, the input of the filter unit
End is electrically connected with the external electrical network, and the output end of the filter unit is electrically connected with the input terminal of the rectification unit, described
The output end of rectification unit is electrically connected with the input terminal of the battery management module.The filter unit is for filtering out in electric current
Ripple, the rectification unit is converted into direct current for will exchange, provides direct current for power battery pack and battery management module
Source.
Specifically, described referring to Fig. 2, the filter unit includes fuse F1, thermistor NTC1 and capacitor C1
The first end of fuse F1 is electrically connected with the external electrical network, the second end of the fuse F1 respectively with the thermistor
One end of NTC1 and the electrical connection of one end of the capacitor C1, the other end ground connection of the capacitor C1, the thermistor NTC1's
The other end is electrically connected with the rectification unit.The fuse F1 is for preventing electric current excessive and burning out battery management module；Institute
Thermistor NTC1 is stated using negative temperature coefficient, its resistance value is to reduce with the raising of temperature, it has suppression circuit
Surge current ability；The capacitor C1 realizes filter function for filtering out ripple.
Specifically, referring to Fig. 2, the rectification unit include by 4 be connected in series diode D form it is whole
Flow bridge, wherein one end of the rectifier bridge is electrically connected with the filter unit, the other end of the rectifier bridge and the battery
Management module electrical connection.
It should be noted that the AC charger includes electromagnetism interference unit, the one of the electromagnetism interference unit
End is electrically connected with the external electrical network, the input terminal of the other end of the electromagnetism interference unit and the two-way inverter
Electrical connection.
Specifically, referring to Fig. 3, the electromagnetism interference unit includes fuse F2, resistance R1, resistance R2 and inductance
L1, one end of the fuse F2 is electrically connected with the first end of the first end of the resistance R1 and the inductance L1 respectively, described
The second end of resistance R1 is grounded after the resistance R2, the input of the second end of the inductance L1 and the two-way inverter
End electrical connection.The fuse F2 is self-recovery fuse, for protecting circuit；The resistance R1, resistance R2 and inductance L1 group
At anti-electromagnetic interference circuit, the electromagnetic noise and noise signal of input AC electricity are inhibited, prevented to power supply disturbance, together
When be also prevented from high frequency spurs that power supply itself generates power grid interfered.
It is appreciated that need to realize battery management system protection work when electric car is in carrying out charging process,
So that electric car can normally charge, to improve stability and reliability to electric car；Therefore, in order to guarantee
Electric car can normally charge, and improve stability and reliability to electric car；For example, in one embodiment, institute
Stating vehicle-mounted two-way inversion system further includes charge protection device, and the charge protection device includes power conversion circuit, over-voltage guarantor
Protection circuit, over-current detection circuit and DC/DC converter circuit, the input terminal of the power conversion circuit are used for and external charger
Electrical connection, the output end of the power conversion circuit and the overvoltage crowbar, the over-current detection circuit and the DCDC
Conversion circuit electrical connection, the output end of the overvoltage crowbar, the over-current detection circuit and the DC/DC converter circuit
It is electrically connected with the battery management system；The power conversion circuit includes resistance R3, resistance R4, resistance R5, resistance R6, electricity
Hinder R7, resistance R8, resistance R9, resistance R10, capacitor C2, capacitor C3, capacitor C4, capacitor C5, diode D1, diode D2, steady
Diode ZD1, metal-oxide-semiconductor Q1, inductance L2 and control chip IC 1 are pressed, the first end of the resistance R3 is used to connect external charging
The second end of machine, the resistance R3 is grounded after the resistance R4, the diode D2, the capacitor C3, the resistance R5,
Both ends of the both ends of the capacitor C2 respectively with the resistance R3 are connected in parallel, the both ends of the diode D1 and the resistance
The both ends of R4 are connected in parallel, the both ends of the inductance L2 sun with the first end of the resistance R3 and the diode D2 respectively
Pole electrical connection；The pole D of the metal-oxide-semiconductor Q1 is electrically connected with the anode of the diode D2, and the pole S of the metal-oxide-semiconductor Q1 is through the electricity
Resistance R8 after be grounded, the pole G of the MOS pipe Q1 respectively with the resistance R6, capacitor C4, zener diode ZD1, resistance R7 one
End electrical connection, the other end of the resistance R6 are electrically connected with a pin of the control chip IC 1, and the capacitor C4's is another
End, the other end of the zener diode ZD1, the resistance R7 the other end be grounded；The first end of the resistance R9 and institute
The pin electrical connection of control chip IC 1 is stated, the second end of the resistance R9 is electrically connected with the pole S of the metal-oxide-semiconductor Q1, described
One end of capacitor C5 is electrically connected with the first end of the resistance R9, the other end ground connection of the capacitor C5, the resistance R10's
One end is electrically connected with the first end of the resistance R9, the other end ground connection of the resistance R10；The overvoltage crowbar includes
Resistance R21, resistance R11, resistance R12, resistance R13, resistance R14, capacitor C6, zener diode ZD2, photoelectrical coupler OT1
And triode Q2, the first end of the resistance R21 are electrically connected with the base stage of the triode Q2, the second end of the resistance R21
It is electrically connected with the emitter of the photoelectrical coupler OT1, the emitter ground connection of the triode Q2, the collection of the triode Q2
Electrode is electrically connected with the control chip IC 1, and one end of the capacitor C6 is electrically connected with the first end of the resistance R21, described
The other end of capacitor C6 is grounded, and one end of the resistance R11 is electrically connected with the emitter of the photoelectrical coupler OT1, the electricity
The other end ground connection of R11 is hindered, one end of the resistance R12 is electrically connected with the collector of the photoelectrical coupler OT1, the electricity
The other end for hindering R12 is used for external reference voltage VREF, and the cathode of the zener diode ZD2 is used to connect external charging
The anode of machine, the zener diode ZD2 is grounded after the resistance R13, the resistance R14, the photoelectrical coupler OT1
Both ends of the both ends respectively with the resistance R13 of light emitting diode be connected in parallel；The over-current detection circuit includes diode
D3, diode D4, transformer T1, inductance L3, zener diode ZD3, resistance R15, resistance R16, resistance R17, capacitor C7, electricity
Hold C8 and triode Q3, the anode of the diode D3 and the charging mechatronics, the cathode of the diode D3 and institute
State one end electrical connection of transformer T1 primary coil, the other end of the transformer T1 output voltage, institute after the inductance L3
The first end for stating resistance R15 is electrically connected with one end of the transformer T1 secondary coil, the second end of the resistance R15 and institute
The other end electrical connection of transformer T1 secondary coil is stated, the second end of the resistance R15 is through the diode D4, two pole
It is electrically connected after pipe ZD3 with the base stage of the triode Q3, one end of the resistance R16 and the cathode of the diode D4 are electrically connected
It connects, the other end ground connection of the resistance R16, one end of the capacitor C7 is electrically connected with the cathode of the diode D4, the electricity
Hold the other end ground connection of C7, one end of the resistance R17 is electrically connected with the anode of the diode ZD3, the capacitor C7's
Other end ground connection, one end of the capacitor C8 are electrically connected with the output end of the inductance L3, and the emitter of the triode Q3 connects
The collector on ground, the triode Q3 is electrically connected with the battery management system；The DC/DC converter circuit include capacitor C9,
Capacitor C10, capacitor C11, capacitor C12, inductance L4, resistance R18, resistance R19, resistance R20, triode Q4, diode D5 and control
One end of coremaking piece IC2, the capacitor C9 are electrically connected after the resistance R18 with a pin of the control chip IC 2, institute
State the other end ground connection of capacitor C9, one end of the inductance L4 and the charging mechatronics, the other end of the inductance L4 with
The control chip IC 2 is electrically connected, and one end of the capacitor C10 is electrically connected with a pin of the control chip IC 2, described
The other end of capacitor C10 is grounded, and the 5th pin of the control chip IC 2 is electric with the resistance R19, the resistance R20 respectively
Connection, the resistance R20 the other end ground connection, the other end of the resistance R19 respectively with the collector of the triode Q4 and
One end of the capacitor C11 is electrically connected, the other end ground connection of the capacitor C11, the anode of the diode D5 and the control
1st pin of chip IC 2 is electrically connected, the cathode of the diode D5 and it is described respectively with the emitter of the triode Q4 and
One end of the capacitor C12 is electrically connected, the other end ground connection of the capacitor C12, the base stage of the triode Q4 and the battery
Management system electrical connection.So, it is ensured that electric car can normally charge, improve to the stability of electric car and
Reliability.
In order to further explain charge protection device, more to understand the technology of charge protection device.For example, institute
Stating charge protection device includes power conversion circuit, overvoltage crowbar, over-current detection circuit and DCDC conversion circuit, described
The input terminal of power conversion circuit be used for external charging mechatronics, the output end of the power conversion circuit with it is described
Overvoltage crowbar, the over-current detection circuit and DC/DC converter circuit electrical connection, it is the overvoltage crowbar, described
Over-current detection circuit and the output end of the DC/DC converter circuit are electrically connected with the battery management system.It should be noted that
The size of the voltage of the power conversion circuit transformation output, the overvoltage crowbar is for preventing high voltage from damaging battery
Management system, the over-current detection circuit are used for the electric current of detection output, if it is excessive electric current occur, starting protection program,
And alarm signal is issued, the DC/DC converter circuit is for providing stable voltage for battery management system.
Specifically, referring to Fig. 4, the power conversion circuit includes resistance R3, resistance R4, resistance R5, resistance R6, electricity
Hinder R7, resistance R8, resistance R9, resistance R10, capacitor C2, capacitor C3, capacitor C4, capacitor C5, diode D1, diode D2, steady
Diode ZD1, metal-oxide-semiconductor Q1, inductance L2 and control chip IC 1 are pressed, the first end of the resistance R3 is used to connect external charging
The second end of machine, the resistance R3 is grounded after the resistance R4, the diode D2, the capacitor C3, the resistance R5,
Both ends of the both ends of the capacitor C2 respectively with the resistance R3 are connected in parallel, the both ends of the diode D1 and the resistance
The both ends of R4 are connected in parallel, the both ends of the inductance L2 sun with the first end of the resistance R3 and the diode D2 respectively
Pole electrical connection；The pole D of the metal-oxide-semiconductor Q1 is electrically connected with the anode of the diode D2, and the pole S of the metal-oxide-semiconductor Q1 is through the electricity
Resistance R8 after be grounded, the pole G of the MOS pipe Q1 respectively with the resistance R6, capacitor C4, zener diode ZD1, resistance R7 one
End electrical connection, the other end of the resistance R6 are electrically connected with a pin of the control chip IC 1, and the capacitor C4's is another
End, the other end of the zener diode ZD1, the resistance R7 the other end be grounded；The first end of the resistance R9 and institute
The pin electrical connection of control chip IC 1 is stated, the second end of the resistance R9 is electrically connected with the pole S of the metal-oxide-semiconductor Q1, described
One end of capacitor C5 is electrically connected with the first end of the resistance R9, the other end ground connection of the capacitor C5, the resistance R10's
One end is electrically connected with the first end of the resistance R9, the other end ground connection of the resistance R10.
Working principle: resistance R9, capacitor C2, resistance R10, resistance R5, capacitor C3, diode D1, diode D2 composition are slow
Device is rushed, and switchs metal-oxide-semiconductor Q1 and connects, makes to switch the reduction of metal-oxide-semiconductor Q1 voltage stress, EMI is reduced, and second breakdown does not occur.From electricity
The current peak signal that resistance R8 is measured participates in the duty ratio control of work at present cycle, therefore is the electric current of work at present cycle
Limitation.When the voltage on resistance R10 reaches 1V, UC3842 stops working, and switch metal-oxide-semiconductor Q1 is immediately turned off, and resistance R6 and opens
Junction capacity CGS, CGD closed in metal-oxide-semiconductor Q1 forms RC network together, and the charge and discharge of capacitor directly affect the switch of switching tube
Speed.Resistance R6 is too small, easily causes to vibrate, and electromagnetic interference also can be very big；Resistance R6 is excessive, can reduce the switch speed of switching tube
Degree.The GS voltage for switching metal-oxide-semiconductor Q1 is usually limited in 18V hereinafter, to protect switch metal-oxide-semiconductor by zener diode ZD1
Q1.The grid controlled voltage for switching metal-oxide-semiconductor Q1 is saw-shaped wave, and when its duty ratio is bigger, switch metal-oxide-semiconductor Q1 turn-on time is got over
Long, the energy stored by transformer is also more；When switching metal-oxide-semiconductor Q1 cut-off, transformer passes through diode D1, diode
D2, resistance R10, resistance R9, capacitor C2 release energy, while also having achieved the purpose that magnetic field resets, next time for transformer
Storage, transmitting energy are got ready.IC adjusts the big of 6. foot saw-shaped wave duty ratio according to output voltage and electric current moment
It is small, to stabilize the output electric current and voltage of complete machine.Capacitor C3 and resistance R5 is peak voltage absorption circuit.In this way, can be with
Realize the transformation of voltage.
Specifically, referring to Fig. 5, the overvoltage crowbar includes resistance R21, resistance R11, resistance R12, resistance
R13, resistance R14, capacitor C6, zener diode ZD2, photoelectrical coupler OT1 and triode Q2, the first end of the resistance R21
It is electrically connected with the base stage of the triode Q2, the emitter electricity of the second end of the resistance R21 and the photoelectrical coupler OT1
Connection, the emitter ground connection of the triode Q2, the collector of the triode Q2 are electrically connected with the control chip IC 1, institute
The one end for stating capacitor C6 is electrically connected with the first end of the resistance R21, the other end ground connection of the capacitor C6, the resistance R11
One end be electrically connected with the emitter of the photoelectrical coupler OT1, the other end of resistance R11 ground connection, the resistance R12
One end be electrically connected with the collector of the photoelectrical coupler OT1, the other end of the resistance R12 is used for external reference voltage
The cathode of VREF, the zener diode ZD2 are used to connect external charger, and the anode of the zener diode ZD2 is through institute
Be grounded after stating resistance R13, the resistance R14, the both ends of the light emitting diode of the photoelectrical coupler OT1 respectively with the electricity
The both ends of resistance R13 are connected in parallel.
Working principle: when Uo has over-voltage phenomenon, voltage-stabiliser tube breakdown conducting is generated through optocoupler (OT1), resistance R14 to ground
Electric current flows through, the lumination of light emitting diode of photoelectrical coupler, so that the phototriode of photoelectrical coupler be made to be connected.Triode
The base stage of Q2 must conduct, and 3 foot electricity of control chip IC 1 reduce, and close IC1, stop the work of entire power supply, Uo zero,
In cycles.
Specifically, referring to Fig. 6, the over-current detection circuit includes diode D3, diode D4, transformer T1, inductance
L3, zener diode ZD3, resistance R15, resistance R16, resistance R17, capacitor C7, capacitor C8 and triode Q3, the diode
One end electricity of the anode of D3 and the charging mechatronics, the cathode of the diode D3 and the transformer T1 primary coil
Connection, the other end of transformer T1 output voltage after the inductance L3, the first end and the change of the resistance R15
One end of depressor T1 secondary coil is electrically connected, the other end of the second end of the resistance R15 and the transformer T1 secondary coil
Electrical connection, base of the second end of the resistance R15 after the diode D4, the diode ZD3 with the triode Q3
Pole electrical connection, one end of the resistance R16 are electrically connected with the cathode of the diode D4, another termination of the resistance R16
Ground, one end of the capacitor C7 are electrically connected with the cathode of the diode D4, the other end ground connection of the capacitor C7, the electricity
One end of resistance R17 is electrically connected with the anode of the diode ZD3, the other end ground connection of the capacitor C7, and the one of the capacitor C8
End be electrically connected with the output end of the inductance L3, and the emitter of the triode Q3 is grounded, the collector of the triode Q3 and
The battery management system electrical connection.
Working principle: transformer T1 is used to detect load current IL, therefore resistance R15 has proportional voltage and generates.
Diode D4 be rectifier diode, resistance R17 and capacitor C7 rectification after filter circuit, if current overload occur, capacitor C7
On voltage will increase the conducting voltage of zener diode ZD3, at this point, triode Q3 can be connected, therefore triode Q3 current collection
Signal on extremely can close the driving signal of voltage-stablizer.
It is to be noted that the design of transformer T1, the annular core of selection make pottery ferromagnetic and MPP of material, but iron
Core cannot work in saturation state.Enclose the design of number: primary circle number generally selects a circle, the electricity of the right secondary of selection of number of secondary turns
It presses and is determined, NP/NS=IS/IP.Due to IR=VS/R1, in maximum given load electric current IC, number of secondary turns
It must be able to generate desired voltage value on the capacitor cl, so NS=NP*IRR1/ (Vs+Vd3).So far my door
One accurate transformer of coiling, and must slightly adjust on circle number on actual circuit test, it is best to accomplish
Performance.
Specifically, referring to Fig. 7, the DC/DC converter circuit include capacitor C9, capacitor C10, capacitor C11, capacitor C12,
Inductance L4, resistance R18, resistance R19, resistance R20, triode Q4, diode D5 and control chip IC 2, the one of the capacitor C9
It holds and is electrically connected after the resistance R18 with a pin of the control chip IC 2, the other end ground connection of the capacitor C9 is described
One end of inductance L4 and the charging mechatronics, the other end of the inductance L4 are electrically connected with the control chip IC 2, institute
The one end for stating capacitor C10 is electrically connected with a pin of the control chip IC 2, and the other end ground connection of the capacitor C10 is described
5th pin of control chip IC 2 is electrically connected with the resistance R19, the resistance R20 respectively, the other end of the resistance R20
Ground connection, the other end of the resistance R19 are electrically connected with one end of the collector of the triode Q4 and the capacitor C11 respectively,
The other end of the capacitor C11 is grounded, and the anode of the diode D5 is electrically connected with the 1st pin of the control chip IC 2,
The cathode of the diode D5 is electrically connected with one end of the emitter of the triode Q4 and the capacitor C12 respectively with described,
The other end of the capacitor C12 is grounded, and the base stage of the triode Q4 is electrically connected with the battery management system.
Working principle: when non-loaded, 6 feet of control chip IC 2 stop working without electricity, input terminal 3.65V work electricity
Stream only has 18uA.(triode Q4 has Ieb electric current) when loaded, the pole the EC conducting of triode Q4, control chip IC 2 obtains electric
Work.Whether it is by having load to determine that whether control chip IC 2 works, and just a suitable battery, makes of control chip IC 2
Voltage conversion efficiency is high, and output is stablized.So, it is ensured that electric car can normally charge, and improve to electric car
Stability and reliability.
The present invention compared with the prior art the advantages of and have the beneficial effect that:
The present invention is a kind of vehicle-mounted two-way inversion system applied on pure electric automobile, is filled by the way that two-way inversion is arranged
It sets, battery management module and power battery pack, can become one vehicle-mounted DC/AC and AC/DC structure, reduce member
The assembly and cost of device, improve the integration degree of electric car, optimize the installation space and convenience pair of electric car
Electric car is installed, and the installation procedure of electric car is reduced.
Only several embodiments of the present invention are expressed for embodiment described above, and the description thereof is more specific and detailed, but
It cannot be construed as a limitation to the scope of the present invention.It should be pointed out that for the ordinary skill people of this field
For member, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the present invention
Protection scope.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of vehicle-mounted two-way inversion system applied on pure electric automobile characterized by comprising charging unit, two-way
Inverter, battery management module and power battery pack,
The output end of the charging unit respectively with the first end of the two-way inverter and the battery management module
One end electrical connection, the first end of the power battery pack is electrically connected with the second end of the battery management module, described two-way inverse
The second end for becoming device is electrically connected with the third end of the battery management module；
The input terminal of the charging unit is also used to be electrically connected with external electrical network, and the third end of the two-way inverter is also used to
It is electrically connected with external loading；
The charging unit includes AC charger and DC charger；The input terminal of the AC charger and the external electrical
Net electrical connection, the output end of the AC charger are electrically connected with the first end of the two-way inverter, the DC charging
The input terminal of device is electrically connected with the external electrical network, and the first of the output end of the DC charger and the battery management module
End electrical connection.
2. the vehicle-mounted two-way inversion system according to claim 1 applied on pure electric automobile, which is characterized in that described
AC charger is alternating-current charging pile.
3. the vehicle-mounted two-way inversion system according to claim 1 applied on pure electric automobile, which is characterized in that described
DC charger is direct-current charging post.
4. the vehicle-mounted two-way inversion system according to claim 1 applied on pure electric automobile, which is characterized in that described
Power battery pack includes multiple single batteries connected in series and/or parallel.
5. the vehicle-mounted two-way inversion system according to claim 1 applied on pure electric automobile, which is characterized in that described
Two-way inverter includes AC/DC module and DC/AC module, and the AC/DC module and the DC/AC module are electrically connected, also,
The AC/DC module is also electrically connected with the battery management module, and the DC/AC module is also electrically connected with the external loading.
6. the vehicle-mounted two-way inversion system according to claim 1 applied on pure electric automobile, which is characterized in that described
DC charger includes filter unit and rectification unit, and the input terminal of the filter unit is electrically connected with the external electrical network, institute
The output end for stating filter unit is electrically connected with the input terminal of the rectification unit, the output end of the rectification unit and the battery
The input terminal of management module is electrically connected.
7. the vehicle-mounted two-way inversion system according to claim 6 applied on pure electric automobile, which is characterized in that described
Filter unit includes the first end and the external electrical network of fuse F1, thermistor NTC1 and capacitor C1, the fuse F1
Electrical connection, the one end of the second end of the fuse F1 respectively with one end of the thermistor NTC1 and the capacitor C1 is electrically connected
It connects, the other end ground connection of the capacitor C1, the other end of the thermistor NTC1 is electrically connected with the rectification unit.
8. the vehicle-mounted two-way inversion system according to claim 6 applied on pure electric automobile, which is characterized in that described
Rectification unit includes the rectifier bridge that the diode D being connected in series by 4 is formed, wherein one end of the rectifier bridge and the filter
The electrical connection of wave unit, the other end of the rectifier bridge are electrically connected with the battery management module.
9. the vehicle-mounted two-way inversion system according to claim 1 applied on pure electric automobile, which is characterized in that described
AC charger includes electromagnetism interference unit, and one end of the electromagnetism interference unit is electrically connected with the external electrical network, institute
The other end for stating electromagnetism interference unit is electrically connected with the input terminal of the two-way inverter.
10. the vehicle-mounted two-way inversion system according to claim 9 applied on pure electric automobile, which is characterized in that institute
Stating electromagnetism interference unit includes fuse F2, resistance R1, resistance R2 and inductance L1, one end of the fuse F2 respectively with institute
The first end of resistance R1 and the first end electrical connection of the inductance L1 are stated, the second end of the resistance R1 is followed by through the resistance R2
Ground, the second end of the inductance L1 are electrically connected with the input terminal of the two-way inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811161533.2A CN109274286A (en) | 2018-09-30 | 2018-09-30 | Applied to the vehicle-mounted two-way inversion system on pure electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811161533.2A CN109274286A (en) | 2018-09-30 | 2018-09-30 | Applied to the vehicle-mounted two-way inversion system on pure electric automobile |
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| CN208986845U (en) * | 2018-09-30 | 2019-06-14 | 广东亿鼎新能源汽车有限公司 | Applied to the vehicle-mounted two-way inversion system on pure electric automobile |
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| US20110204851A1 (en) * | 2010-02-25 | 2011-08-25 | Panasonic Automative Systems Company of America, Division of Panasonic Corporation of North America | Vehicle bi-directional power inverter system and method |
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