CN108202642A - Electric vehicle integrated driving system based on two-way inversion charge and discharge - Google Patents
Electric vehicle integrated driving system based on two-way inversion charge and discharge Download PDFInfo
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- CN108202642A CN108202642A CN201810240865.3A CN201810240865A CN108202642A CN 108202642 A CN108202642 A CN 108202642A CN 201810240865 A CN201810240865 A CN 201810240865A CN 108202642 A CN108202642 A CN 108202642A
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- 238000007599 discharging Methods 0.000 claims abstract description 10
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- 230000005611 electricity Effects 0.000 claims description 19
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000006837 decompression Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 9
- 238000011161 development Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
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- 239000000203 mixture Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
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- 230000010354 integration Effects 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of electric vehicle integrated driving system based on two-way inversion charge and discharge, including：The power assembly being made of motor, electric machine controller and retarder, electric machine controller is connect respectively with the battery of electric vehicle, the motor, retarder, the electric machine controller includes three-phase inversion major loop, whole system is made to be integrated with bidirectional charger by forming Bidirectional charging-discharging conversion circuit in a manner of repeated use of device in the three-phase inversion major loop topology of the electric machine controller（OBC）Function.The present invention is multiplexed the device of inversion major loop, can realize two-way V G, V L, V V, L V Bidirectional charging-discharging functions in the case where not increasing compared with multicomponent.Both can high power AC charging directly be carried out to electric vehicle by AC network, can also automotive discharge be connected to the grid weaken power grid pressure, it can also discharge and power to AC load, so as to effectively mitigate the pressure of power grid and realize abundant, the effective use of energy, vehicle is allowed no longer to be vehicle, becomes mobile energy-accumulating power station.
Description
Technical field
The present invention relates to New-energy electric vehicle technical fields more particularly to a kind of based on the electronic of two-way inversion charge and discharge
Automobile integrated driving system specifically includes electric powered motor Integrated Solution and electric machine controller Integrated Solution.
Background technology
At present, as energy shortage and the increasingly exacerbation of problem of environmental pollution and the continuous of International Petroleum Price are risen,
A branch of the pure electric automobile as New Green Energy source technology, with zero-emission, noise is low, structure is relatively easy, Ke Yishi
The advantages that existing transportation and energy's weighting prediction, as the developing direction of future automobile technology, is gradually favored, market part by people
Volume is also increasing year by year, and the demand of user is also more and more, and the product development function of promoting electric vehicle parts manufacturer is richer
It is rich.
But the course continuation mileage of electric vehicle, which is also user's emphasis, to be considered the problems of, pays close attention to, also therefore many vehicle enterprises
Receive puzzlement.Second trolley of the electric vehicle as family, but it is tired so that the development of electric vehicle receives by course continuation mileage
Puzzlement, the course continuation mileage problem and battery of vehicle have inseparable relationship, if it is desired to starting with from battery increases course continuation mileage
The volume of increase battery is just needed, so that the charging time is elongated, the arrangement space of vehicle becomes smaller, and overall weight also increases.
Charging problems annoying the popularization of electric vehicle always at present, and DC charging power is big, but can only go to charge to charging station, so
And the limited amount of charging station；AC charging is everywhere, and family also has, but charge efficiency is low, therefore family is rarely employed
Alternating current charging.
Charging equipment is completely universal not yet at present, the charging equipment that part of the manufacturer releases, structure type also disunity and
It is expensive.The serious development for restricting new energy industry of development of electric vehicle auxiliary facility, so that how to innovate carries
Going out a kind of safely and effectively charging system for electric automobile or device is just particularly important, also as the class of entire new energy industry
Topic.
Invention content
The present invention provides a kind of achievable high-power charging of alternating current, and charging is more convenient, quick, mitigates the pressure of power grid
The electric vehicle integrated driving system based on two-way inversion charge and discharge.
To achieve the above object, the present invention provides a kind of electric vehicle integrated driving system based on two-way inversion charge and discharge
System, including：The power assembly being made of motor, electric machine controller and retarder, the electric machine controller respectively with electric vehicle
Battery, the motor, retarder connection, the electric machine controller include three-phase inversion major loop, the electric machine controller
Whole system is integrated in three-phase inversion major loop topology by forming Bidirectional charging-discharging conversion circuit in a manner of repeated use of device
Bidirectional charger function.
Optionally, the electric vehicle integrated driving system further includes：The two-way charging battery port in periphery, the periphery charge and discharge
Electric port is connect with the three-phase inversion major loop.
Optionally, it is distinguished during reverse charging or when forward direction is discharged with operating mode, the three-phase inversion major loop includes：
Buck reduction voltage circuits and single-phase inversion/PWM rectification circuits, one end of the single-phase inversion/PWM rectification circuits connect the electricity
Machine, the other end connect one end of the Buck reduction voltage circuits, and the other end of the Buck reduction voltage circuits connects the battery.
Optionally, the electric vehicle integrated driving system further includes：Support Capacitor and passive discharge resistance, the support
Capacitance and passive discharge resistance are connected between the Buck reduction voltage circuits and the battery.
Optionally, the electric vehicle integrated driving system further includes：It is connected to the peripheral charge and discharge port and motor
Between EMI circuits, inductance and buffer circuit, the EMI circuits, inductance and buffer circuit are sequentially connected.
Optionally, the electric machine controller supports V-V, V-G, V-L, L-V operating mode.
The beneficial effects of the invention are as follows：It is integrated by electric powered motor and is integrated with electric machine controller, in electric machine controller
Three-phase inversion major loop topology on by forming Bidirectional charging-discharging conversion circuit in a manner of repeated use of device integrate whole system
There is bidirectional charger function, it can be achieved that the high-power charging of alternating current, charging are more convenient, quick.It can be subtracted using electric vehicle
The pressure of light power grid, at electricity consumption the lowest point, electric vehicle charges again, so as to effectively mitigate the pressure of power grid and realize
Abundant, the effective use of energy allow vehicle to be no longer vehicle, become mobile energy-accumulating power station.This programme is not increasing compared with multicomponent
In the case of, the device of inversion major loop is multiplexed, can realize Bidirectional charging-discharging function.It both can be by AC network directly to electronic
Automobile carry out high power AC charging, can also automotive discharge be connected to the grid weaken power grid pressure；Civilian alternating current can pass through
Special connecting line directly charges the battery, and can also discharge and power to AC load.Do not increasing compared with multicomponent and component
In the case of enrich function, the charging of quickness and high efficiency discharges into power grid when idle or gives AC load power supply, promotion user's body
It tests, realizes V-G, V-L, V-V, L-V function.
Compared with prior art, the invention has the advantages that：
1st, it saves independent charger (OBC) unit and Corresponding matching harness, system altitude integrates, preferably played and subtracted
Light weight and the advantage for reducing volume save the arrangement space of vehicle；
2nd, on the basis of multiplexing inversion major loop device improves practicality, more multi-functional, promotion user experience is integrated；
3rd, in the case where polarity of voltage is constant, two-way, the high efficiency of transmission of energy are realized；Utilize two-way inversion charge and discharge skill
Art realizes two-way V-V, V-L, V-G, L-V function.
4th, it is usually normally opened relay, is customized to normally closed relay here, prevents charge-discharge system failure from influencing vehicle
Normal driving.
5th, the present invention, which can be realized, carries out electric vehicle using AC network, electric vehicle, alternating current etc. multiple types
High power AC charge, allow user whenever and wherever possible, high efficiency charging.
Cost greatly reduces in the considerations of more than and function and system all realize it is highly integrated.
Description of the drawings
Fig. 1 is that the integrated framework of the electric vehicle integrated driving system proposed by the present invention based on two-way inversion charge and discharge shows
It is intended to；
Fig. 2 is the major loop topology of the electric vehicle integrated driving system proposed by the present invention based on two-way inversion charge and discharge
Structure diagram；
Fig. 3 is that the AC charging of the electric vehicle integrated driving system proposed by the present invention based on two-way inversion charge and discharge is former
Manage schematic diagram；
Fig. 4 is that the forward direction of the electric vehicle integrated driving system proposed by the present invention based on two-way inversion charge and discharge is single-phase complete
Bridge inversion (H bridges) direction PWM rectification schematic diagrames；
Fig. 5 is the reversed Buck drops of the electric vehicle integrated driving system proposed by the present invention based on two-way inversion charge and discharge
Volt circuit structure diagram.
Specific embodiment
The present invention considers：Vehicle-mounted charge machine equipment by the electric energy of power grid by converting direct current again to electricity under normal conditions
Pond is charged, and battery is providing power for entire electric vehicle, to meet the course continuation mileage of electric vehicle.But vehicle spare time
Between, the energy of battery can provide electric energy by conversion for AC load, DC load and power grid, and these all do not have
To good utilization and development.And with the increase of electric vehicle quantity, in peak of power consumption, majority vehicle charges pair together
The pressure of power grid is huge, but there is also idle for energy in stock idle, if it is possible to mitigate electricity using electric vehicle
The pressure of net, at electricity consumption the lowest point, electric vehicle carries out charging the effective pressure for mitigating power grid again and realizes filling for energy
Divide, effective use, vehicle is allowed to be not vehicle, becomes mobile energy-accumulating power station.
Many people are not only to pay close attention to new energy, clean energy resource at present, now slowly begin to focus on energy storing technology,
Particularly battery energy storage system.The energy that part alternating current can be stored when not working can be put when needed in battery
Electricity realizes two-way V-V, V-L, V-G, L-V function to AC load, power grid, other vehicles.
A kind of technical solution for the present invention below, on the basis of matured product controller, motor, retarder, multiplexing
The major loop main components of controller realize the two-way flow of energy, and it is empty to save arrangement while realizing Highgrade integration
Between, collection driving motor while reduce cost, vehicle-mounted charge, DC charging station function, realize the work(of V-G, V-L, V-V, L-V
Can, vehicle is allowed no longer to be vehicle but the energy-accumulating power station of movement.Specific scheme is implemented as follows：
Specifically, it is the electric vehicle collection proposed by the present invention based on two-way inversion charge and discharge to please refer to Fig. 1-Fig. 5, Fig. 1
Into the integrated framework schematic diagram of drive system；Fig. 2 is that the electric vehicle proposed by the present invention based on two-way inversion charge and discharge integrates
The major loop topological structure schematic diagram of drive system；Fig. 3 is the electric vehicle proposed by the present invention based on two-way inversion charge and discharge
The AC charging principle schematic of integrated driving system；Fig. 4 is the electronic vapour proposed by the present invention based on two-way inversion charge and discharge
Positive single-phase full bridge inversion (H bridges) direction PWM rectification schematic diagrames of vehicle integrated driving system；Fig. 5 is proposed by the present invention is based on
The reversed Buck reduction voltage circuits structure diagram of the electric vehicle integrated driving system of two-way inversion charge and discharge.
As shown in Figure 1, a kind of electric vehicle integrated driving system based on two-way inversion charge and discharge proposed by the present invention, packet
It includes：The power assembly being made of motor, electric machine controller and retarder, the electric machine controller respectively with the electricity of electric vehicle
Pond, the motor, retarder connection, the electric machine controller include three-phase inversion major loop, the three-phase of the electric machine controller
By forming Bidirectional charging-discharging conversion circuit in a manner of repeated use of device, to be integrated with whole system two-way in inversion major loop topology
Charger function.
Wherein, the electric vehicle integrated driving system further includes：Peripheral charge and discharge port, the periphery charge and discharge port
It is connect with the three-phase inversion major loop.
Optionally, it is distinguished during three-phase inversion major loop charging or when putting with operating mode, the three-phase inversion
Major loop includes：Buck reduction voltage circuits and single-phase inversion/PWM rectification circuits, one end of the single-phase inversion/PWM rectification circuits
The motor is connected, the other end connects one end of the Buck reduction voltage circuits, the other end connection institute of the Buck reduction voltage circuits
State battery.
The electric vehicle integrated driving system further includes：Support Capacitor and passive discharge resistance, the Support Capacitor and
Passive discharge resistance is connected between the Buck reduction voltage circuits and the battery.
The electric vehicle integrated driving system further includes：It is connected between the peripheral charge and discharge port and motor
EMI circuits, inductance and buffer circuit, the EMI circuits, inductance and buffer circuit are sequentially connected.
The electric machine controller of the present embodiment supports V-V, V-G, V-L, L-V operating mode, realizes V-G, V-L, V-V, L-V work(
Energy.Specifically, the present invention can realize that industrial electrical network or civilian exchange supply electricity to the state L-V, G-V of electric vehicle charging；It is electronic
The bi-directional conversion that automobile discharges to AC load or power grid V-L, V-G, energy in bidirectional flow, effective use function.
Compared with prior art, the present invention relates to electric powered motor Integrated Solution and electric machine controller Integrated Solution, schemes
In the case where not increasing compared with multicomponent, the device of inversion major loop is multiplexed, can realize Bidirectional charging-discharging function.It both can be by
AC network directly to electric vehicle carry out high power AC charging, can also automotive discharge be connected to the grid weaken power grid pressure
Power；Civilian alternating current can directly be charged the battery by special connecting line, can also be discharged and be powered to AC load.As hand over
Galvanic electricity is converted into direct current directly to charging batteries of electric automobile by controller inversion major loop.
The present invention program is described in detail below：
As shown in Fig. 2, all relays being connected with motor is controlled to connect by MCU during normal driving in scheme, three contraries
Become major loop work and drive motor rotation；During charging and discharging, MCU control relays are not attached to motor, contactor is closed, complete
Into the rectification of charging and the single-phase inversion of electric discharge, charge the battery or the power grid that discharges, AC load, electric vehicle.Battery arrives
BUCK reduction voltage circuits are separated by contactor, but do not interfere with the function of three-phase inversion；Controller is separated with motor by relay；
There is buffer circuit to separate to alternating current/grid parts in scheme, all relays and contactless contactor are controlled entirely by controller MCU is unified
System.
When driving motor rotates, battery provides electric energy, and MCU control reduction voltage circuit switches, which disconnect, not to work, and connects motor side
Relay switch connection, controller response VCU given torque, rotary speed instruction, make motor rotate provided to electric vehicle it is dynamic
Energy.
During electric discharge, the switch being connected with motor does not reconnect, open-minded to output alternating current partial circuit.The direct current of battery
By the partial circuit single-phase inversion in former three-phase inversion circuit for after alternating current, via inductance, EMI (Electromagnetic
Interference, electromagnetic interference) filtering removal stray inductance after can be fed to power grid, when making up power grid peak of power consumption pressure or
Give AC load function of supplying power, vehicle not be vehicle but the energy-accumulating power station of movement, on the basis of ensureing use, promote user's body
It tests.
During charging, power grid exchanges the three-phase inversion major loop of stake, household electric and commercial power through original motor controller
PWM is rectified into the battery charging that direct current supplies electricity to vehicle, and alternating current large-power charging, charging is more convenient, quick, and electrically-charging equipment zero is thrown
Money, it is consistent with global rechargeable standard, so that electric vehicle is no longer only vehicle and can be a household electrical appliance.
The present invention can realize the function of two-way V-G, V-L, V-V, L-V charge and discharge, repeated use of device rate higher, and height collects
Into reducing cost to a certain extent, save arrangement space.
As shown in Fig. 2, major loop topological structure is by controller major loop, peripheral charge and discharge port, battery, motor form
Main topology.
The contactor of trickle charge control is controlled by electric machine controller MCU to be disconnected, the normal mode of operation of electric machine controller：MCU
The instruction of entire car controller VCU is received, provide power by battery unit rotates through inversion major loop inversion driving motor.
Wherein, circuit diagram is described as follows：
1st, forward and reverse driving：1) when relay is normally opened：MCU control relays KM3, KM1, KM2, which are connected, to be closed, and battery carries
DC inversion to major loop, then by S3-S8 inversions major loop is three-phase alternating current by the power supply for enough voltage class, and is responded
VCU gives corresponding rotating speed and torque command, driving motor normal rotation.
1) when relay is normally closed：Relay KM3, KM1, KM2 closed state, battery provide the power supply of enough voltage class
By DC inversion it is three-phase alternating current, and respond VCU to corresponding rotating speed and torque to major loop, then by S3-S8 inversions major loop
Instruction, driving motor normal rotation.
2nd, braking/feedback：Corresponding voltage charges the battery, so as to fulfill energy recovery function.
3rd, two-way trickle charge pattern：
1) electric discharge in the case of relay normally open：In vehicle spare time or power grid peak of power consumption, need urgent offer friendship
During galvanic electricity；Relay KM3, KM1 and KM2 off-state, contactor PLY4 are closed.S5-S8 combines to form unidirectional full-bridge inverting electricity
Road, the direct current of battery are applied to inversion circuit power supply, are reverse into exchange and supply electricity to subsequent communication load or feed back to power grid.
2) electric discharge in the case of relay is normally closed：In vehicle spare time or power grid peak of power consumption, need urgent offer friendship
During galvanic electricity；MCU control relays KM3, KM1 and KM2 are disconnected, and contactor PLY4 is closed.S5-S8 combines to form unidirectional full-bridge inverting
Circuit, the direct current of battery are applied to inversion circuit power supply, are reverse into exchange and supply electricity to subsequent communication load or feed back to power grid.
As shown in figure 3, the parsing of AC charging principle is as follows：
1) charging in the case of relay normally open：Relay KM3, KM1, KM2 off-state, the alternating current of rear end is by master
After the PWM rectifier circuit rectifies of circuit S5-S8 compositions, then the decompression of Buck circuits is formed by L1, RLY4, S3, S4 and is charged the battery.
2) charging in the case of relay is normally closed：MCU control relays KM3, KM1, KM2 are disconnected, the alternating current warp of rear end
After crossing the PWM rectifier circuit rectifies of major loop S5-S8 compositions, then Buck circuits are formed by L1, RLY4, S3, S4 and are depressured to battery
Charging.
As shown in figure 4, reversely PWM rectification principles are as follows for positive single-phase full bridge inversion (H bridges)：
During forward direction electric discharge, battery DC electricity becomes alternating current after unidirectional full-bridge inverting (H bridges)；
During reverse charging, external alternating current becomes direct current after PWM rectifications and supplies electricity to charging on-vehicle battery.
As shown in figure 5, in reversed Buck reduction voltage circuits, present invention multiplexing major loop leaves unused element, driving or charging
When among switch RLY4 disconnect, circuit do not work, the bridge arm of power tube S3, S4 as three-phase inversion；RLY4 is closed during charging,
S3 charges the battery as diode decompression, is used as BUCK reduction voltage circuits as switching tube, S4.
V-G operating modes：With reference to the behaviour in service of power grid, during low power consumption, power grid charges to electric vehicle reserve power
In case follow-up use；During peak of power consumption, electric vehicle is to the grid-connected electric discharge of power grid, by the limitation energy back of deposit to power grid.
Alleviate the pressure of power grid to a certain extent, then electric vehicle just be not only the vehicles, an even more mobile storage
It can power station.
V-L operating modes：Vehicle battery voltage is given by that can be applied to the both ends of AC load after single-phase full bridge inversion
It is powered, similar to a mobile power.Such as have a power failure that can play to family powered lighting or go out can be to electric oven
Or school, the emergency service etc. of hospital, the situation of the puzzlement and emergency service having a power failure is solved well, improves the base of practicability
On plinth, user experience is promoted.
L-V operating modes：It is external either commercial power or civilian mains AC are high-power can be whole via PWM
Current circuit rectification, BUCK circuits, which are depressured, gives battery high-power charging.
Compared with prior art, the advantage of this programme is：
1st, in the case where polarity of voltage remains unchanged, energy two-way transmission is conveniently realized, entire scheme has
Efficient, small, repeated use of device rate height.
2nd, optimize electric vehicle overall performance and efficiency, increase the mileage travelled of electric vehicle and better conform to city work
Condition preferably adapts to Brake energy recovery and converter output terminal is avoided situations such as surge voltage occur.
3rd, function is highly integrated, facilitates realize Bidirectional charging-discharging function with this solution, be greatly saved arrangement space
And integral vehicle cost, facilitate arrangement and loss of weight.
4th, the function of two-way V-L, V-G, V-V charge and discharge is realized on the basis of independent trickle charge unit (OBC) is not increased, is propped up
The powering modes such as V → G, V → L, V → V, L-V are held, the increasingly sophisticated application operating mode of China's electric vehicle is adapted to, is greatly promoted
The practicability of electric vehicle and bring the good experience of user.
5th, independent OBC units and Corresponding matching harness are saved, is substituted with peripheral function；
Cost and highly integrated greatly reduces in the considerations of more than.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every utilization
Equivalent structure or the flow transformation that description of the invention and accompanying drawing content are made, are directly or indirectly used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (7)
1. a kind of electric vehicle integrated driving system based on two-way inversion charge and discharge, which is characterized in that including：It is mechanical, electrical by electricity
The power assembly that machine controller and retarder are formed, the electric machine controller respectively with the battery of electric vehicle, the motor, subtract
Fast device connection, the electric machine controller include three-phase inversion major loop, the three-phase inversion major loop topology of the electric machine controller
On whole system is made to be integrated with bidirectional charger function by forming Bidirectional charging-discharging conversion circuit in a manner of repeated use of device.
2. the electric vehicle integrated driving system according to claim 1 based on two-way inversion charge and discharge, which is characterized in that
The electric vehicle integrated driving system further includes：Peripheral charge and discharge port, the periphery charge and discharge port and three contrary
Become major loop connection.
3. the electric vehicle integrated driving system according to claim 2 based on two-way inversion charge and discharge, which is characterized in that
The three-phase inversion major loop includes：Buck reduction voltage circuits and single-phase inversion/PWM rectification circuits, the single-phase inversion/PWM are whole
One end of current circuit connects the motor, and the other end connects one end of the Buck reduction voltage circuits, the Buck reduction voltage circuits
The other end connects the battery.Wherein three-phase inversion major loop is in detail：During reverse charging：Charge and discharge port approach PWM is whole
Stream and Buck decompressions charge the battery；During forward direction electric discharge：Battery is after Buck decompressions and the unidirectional inversion of H bridges to peripheral charge-discharge end
Mouthful, as three-phase inversion major loop forward direction is refined as：The unidirectional inversion of Buck decompression-H bridges；Reversely it is refined as：PWM rectifications-Buck
Decompression.
4. the electric vehicle integrated driving system according to claim 3 based on two-way inversion charge and discharge, which is characterized in that
The electric vehicle integrated driving system further includes：Support Capacitor and passive discharge resistance, the Support Capacitor and passive electric discharge
Resistance is connected between the Buck reduction voltage circuits and the battery.
5. the electric vehicle integrated driving system according to claim 3 based on two-way inversion charge and discharge, which is characterized in that
The electric vehicle integrated driving system further includes：EMI circuits, the electricity being connected between the peripheral charge and discharge port and motor
Sense and buffer circuit, the EMI circuits, inductance and buffer circuit are sequentially connected.
6. the electric vehicle integrated driving system according to any one of claims 1-5 based on two-way inversion charge and discharge,
It is characterized in that, the electric machine controller supports V-V, V-G, V-L, L-V operating mode.
7. the electric vehicle integrated driving system according to claim 1 based on two-way inversion charge and discharge, which is characterized in that
It is connected between the major loop and motor by the MCU relays controlled, the relay can be normally closed or normally opened.
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| CN201810240865.3A CN108202642A (en) | 2018-03-22 | 2018-03-22 | Electric vehicle integrated driving system based on two-way inversion charge and discharge |
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