CN110194078A - Electric car, battery pack charge-discharge circuit and charge/discharge control method - Google Patents
Electric car, battery pack charge-discharge circuit and charge/discharge control method Download PDFInfo
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- CN110194078A CN110194078A CN201910535975.7A CN201910535975A CN110194078A CN 110194078 A CN110194078 A CN 110194078A CN 201910535975 A CN201910535975 A CN 201910535975A CN 110194078 A CN110194078 A CN 110194078A
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- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims abstract description 52
- 230000005611 electricity Effects 0.000 claims description 24
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
-
- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
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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
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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
- 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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to electric automobiles, provide a kind of electric car, battery pack charge-discharge circuit and charge/discharge control method.Battery pack charge-discharge circuit includes: main battery packet, is connected to load node through the first branch；First external connection battery packet can be connected in parallel to the first branch by first node through the second branch where first switch part and DCDC；Or load node is connected to through third branch；Vehicular charger is connected to third branch through second node；First charging end, is connected to Vehicular charger, can successively be connected to the first external connection battery packet with second node through Vehicular charger, and is successively connected to main battery packet through Vehicular charger, second node and first node；Second charging end can be connected to main battery packet, and successively be connected to the first external connection battery packet with second node through first node.Main battery packet and external connection battery packet of the invention can independently drive or parallel drive load, and main battery packet and external connection battery Bao Jun are able to achieve fast charge and trickle charge, and battery pack switching flexibly, is applicable in several scenes.
Description
Technical field
The present invention relates to electric automobiles, specifically, being related to a kind of battery pack charge-discharge circuit, are configured with the battery pack
The charge/discharge control method of the electric car of charge-discharge circuit and the battery pack charge-discharge circuit.
Background technique
Battery technology is one of core technology of electric car, and battery technology has been largely fixed the continuous of electric car
Navigate mileage, also just determines the make purchases worth more of electric car.
For the course continuation mileage for increasing electric car, need to increase battery capacity.But battery capacity raising will certainly be brought into
This raising, and battery configuration can not be also continuously increased in the limited space of electric car.Based on this, master is developed in the prior art
The scheme that packet and secondary packet are applied in combination, battery pack of the main packet as electric car factory assembly, pair packet are mentioned in electric car needs
It is used instead when high course continuation mileage.The deployment cost of electric car had not only been reduced in this way, but also has been able to achieve the raising of course continuation mileage, had been taken into account
The economy and dynamic property of electric car.
But the scheme that existing main packet and secondary packet are applied in combination, generallys use main packet and secondary packet is directly in parallel, flexibility and
Use demand is not achieved in reliability.
It should be noted that the information in above-mentioned background technology part application is only used for reinforcing the reason to background of the invention
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
In view of this, the present invention provides a kind of battery pack charge-discharge circuit, the electricity configured with the battery pack charge-discharge circuit
The charge/discharge control method of electrical automobile and the battery pack charge-discharge circuit, to improve the flexibility and reliability of battery pack.
According to an aspect of the present invention, a kind of battery pack charge-discharge circuit is provided, electric car, the battery are configured at
Packet charge-discharge circuit includes: main battery packet, is connected to load node through the first branch；First external connection battery packet can be opened through one first
Second branch where closing part and a DCDC module is connected in parallel to the first branch, and the second branch and the first branch are simultaneously
It is coupled to first node；Alternatively, the first external connection battery Bao Nengjing third branch is connected to the load node；Vehicular charger,
The third branch is connected to through second node；First charging end is connected to the Vehicular charger, and first charging end can be successively
The first external connection battery packet is connected to the second node through the Vehicular charger, and successively through the Vehicular charger,
The second node is connected to the main battery packet with the first node；Second charging end, can be connected to the main battery packet, and according to
It is secondary that the first external connection battery packet is connected to the second node through the first node.
Preferably, in above-mentioned battery pack charge-discharge circuit, the DCDC module is integrated in the Vehicular charger, institute
Second node is stated to be connected between the DCDC module and the first node；The second branch is from the first external connection battery packet
It rises, successively after the first switch part, the DCDC module of the Vehicular charger, the second node, by described
First node is connected in parallel to the first branch.
Preferably, in above-mentioned battery pack charge-discharge circuit, the Vehicular charger includes front stage circuits and late-class circuit,
The DCDC module is the late-class circuit, and the first switch part is connected between the front stage circuits and the late-class circuit.
Preferably, in above-mentioned battery pack charge-discharge circuit, the first switch part is integrated in the Vehicular charger；
Alternatively, the first switch part is integrated in the PDU module of the electric car.
Preferably, in above-mentioned battery pack charge-discharge circuit, further include a second switch part, be connected to the described first external electricity
Between Chi Bao and the second node.
Preferably, in above-mentioned battery pack charge-discharge circuit, the second switch part is integrated in the Vehicular charger；
Alternatively, the second switch part is integrated in the PDU module of the electric car.
Preferably, further include a current sensor in above-mentioned battery pack charge-discharge circuit, be connected to the first node and
Between the load node.
It preferably, further include one or more second external connection battery packets, Mei Gesuo in above-mentioned battery pack charge-discharge circuit
It states the second external connection battery Bao Nengjing third node and is connected to the third branch, the third node is located at first external connection battery
Between packet and the second node；Alternatively, each second external connection battery packet is connected to the load node through separate branches.
Preferably, in above-mentioned battery pack charge-discharge circuit, the main battery packet, the first external connection battery packet and described
Second external connection battery packet is respectively connected to the switch member that can control its on-off.
According to another aspect of the present invention, a kind of electric car is provided, the electric car is configured with above-mentioned battery
Packet charge-discharge circuit.
According to another aspect of the present invention, a kind of discharge control method is provided, for controlling above-mentioned battery pack charge and discharge
The electric discharge of circuit, the discharge control method include: to connect the first branch according to main battery Packet driven signal, make institute
It states main battery packet and drives load through the load node；According to the first external connection battery Packet driven signal, the third branch is connected,
The first external connection battery packet is driven through the load node to load；According to parallel drive signal, described first is first connected
Road, after at least through the first switch part connect the second branch, make the first external connection battery packet through the DCDC mould
Block and the main battery packet parallel drive load.
According to another aspect of the present invention, a kind of charge control method is provided, for controlling above-mentioned battery pack charge and discharge
The charging of circuit, the charge control method include: to connect second charging end according to the second charging signals of main battery packet
With the access between the main battery packet, second charging end is driven to power to the main battery packet；According to main battery packet
One charging signals connect the access between first charging end and the main battery packet, drive first charging end through institute
Vehicular charger is stated to power to the main battery packet；According to first the second charging signals of external connection battery packet, connects described second and fill
Access between electric end and the first external connection battery packet drives second charging end to supply to the first external connection battery packet
Electricity；According to first the first charging signals of external connection battery packet, connect between first charging end and the first external connection battery packet
Access, drive first charging end to power through the Vehicular charger to the first external connection battery packet；According in parallel the
Two charging signals, successively connect access between second charging end and the main battery packet and with first external connection battery
Access between packet；And according to first charging signals in parallel, successively connect first charging end and the main battery packet it
Between access and the access between the first external connection battery packet.
The beneficial effect of the present invention compared with prior art is:
Load can be operated alone in main battery packet by the first branch；It can be with when needing to improve the course continuation mileage of electric car
So that the first external connection battery packet is connected in parallel to the first branch by second branch, realizes that main battery packet and the first external connection battery packet joint drive
Dynamic load；Or first external connection battery packet load can be operated alone by third branch；Third branch or independent branch can also be passed through
One or more second external connection battery packets are accessed on road, realize further increasing for course continuation mileage, and battery pack switching flexibly, is applicable in more
Kind scene.
Main battery packet and the first external connection battery packet/second external connection battery Bao Junneng are connected to the first charging end and Vehicular charger
Realize it is low power charge at a slow speed, or powerful quick charge is realized in the second charging end of connection, is independent of each other, high reliablity.
In addition, DCDC module can integrate in Vehicular charger, DCDC cost is on the one hand saved, is on the other hand realized
The multiplexing of DCDC module；When the first external connection battery packet parallel connection accesses main battery packet, DCDC module adjusts the first external connection battery packet
Output, stablize shunt voltage, when main battery packet and the first external connection battery packet/second external connection battery packet trickle charge, DCDC module tune
Charging voltage is saved, circuit structure is simple, and flexibility ratio is high.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.It should be evident that the accompanying drawings in the following description is only the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
The schematic diagram of battery pack charge-discharge circuit in each embodiment of the present invention is shown respectively in FIG. 1 to FIG. 4；
Fig. 5 shows the schematic diagram of charge control method in the embodiment of the present invention；
Fig. 6 shows the schematic diagram of discharge control method in the embodiment of the present invention.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein.On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.It is identical attached in figure
Icon note indicates same or similar structure, thus will omit repetition thereof.
Battery pack charge-discharge circuit of the invention is configured in electric car.FIG. 1 to FIG. 4 is shown respectively several battery packs and fills
The structure of discharge circuit, Fig. 1 are basic embodiments of the invention, hereafter by Fig. 1 structure and principle be described in detail.?
When illustrating Fig. 2~Fig. 4, structure identical with Fig. 1 and principle will not be repeated again, and mainly illustrate the difference with Fig. 1.Certainly, one
A little structures and principle not shows in detail in the accompanying drawings, with explanatory note.
It please refers to shown in Fig. 1, battery pack charge-discharge circuit includes: in the present embodiment
Main battery packet 11 is connected to load node N0 through first branch P1.
First external connection battery packet 12, can be in parallel through the second branch P2 where a first switch part S1 and a DCDC module 32
First node N1 is parallel to first branch P1, second branch P2 and first branch P1.Alternatively, the first external connection battery packet 12
Load node N0 can be connected to through third branch P3.
Vehicular charger 3 is connected to third branch P3 through second node N2.
First charging end 4, is connected to Vehicular charger 3, and the first charging end 4 can be successively through Vehicular charger 3 and second node
N2 is connected to the first external connection battery packet 12, and is successively connected to main battery packet with first node N1 through Vehicular charger 3, second node N2
11。
Second charging end 5, can be connected to main battery packet 11, and successively be connected to outside first through first node N1 with second node N2
Connect battery pack 12.
Wherein, main battery packet 11 is fixedly mounted on electric car, and the first external connection battery packet 12 is removably installed in electricity
Electrical automobile.When main battery 11 not enough power supply of packet as original-pack energy source, the first external connection battery packet 12 can be accessed into electricity
Pond packet charge-discharge circuit, to increase the course continuation mileage of electric car.The electricity of monitoring main battery packet 11, and access first are external
The electric quantity monitoring and load balancing of main battery packet 11 and the first external connection battery packet 12 distribution etc. is by electric car after battery pack 12
Battery management system (BMS) realizes that the present invention is without limitation.
The first branch is connected to load node N0 by main battery packet 11 referring to shown in shown by arrow P1.Only schematically show in figure
Several main branch roads in example battery pack charge-discharge circuit, do not show detailed circuit structure, can also wrap in each branch
Other electronic components and branch structure not shown in the figure are included, are not limited with diagram.Load node N0 is born for connecting load 2
Carry 2 be electric car high voltage electric device, such as PEU module 21 shown in Fig. 3, PTC module 22, air compressor machine 23 etc..PEU mould
Block 21 is the motor inverter of electric car, and PTC module 22 is the air-conditioning heater of electric car, and air compressor machine 23 is electric car
Air compressor.It can connect switch member between load node N0 and load 2, pass through the on-off of switch member control load 2.
Second branch is referring to shown in shown by arrow P2, by the first external connection battery packet 12 through first switch part S1 and DCDC module
32 are connected in parallel to first branch P1.First switch part S1 may include one or more switch elements, and switch element can be relay
Device, contactor, electronic switch, air switch or other any type of switch elements.DCDC(Direct Current-
Direct Current, DC-DC) module 32 is a dc voltage changer, it connects in parallel in the first external connection battery packet 12
To the second branch P2 of main battery packet 11, play when the first external connection battery packet 12 is with 11 parallel drive of main battery packet load 2,
The output of the first external connection battery packet 12 is adjusted, the effect of shunt voltage is stablized.In a preferred embodiment, above-mentioned battery pack is filled
Discharge circuit further includes a current sensor MT, is connected between first node N1 and load node N0.Current sensor MT can be with
When the first external connection battery packet 12 is with 11 parallel drive of main battery packet, total load current is acquired, to adjust outside first accordingly
Connect the bearing power of battery pack 12 and main battery packet 11.
When the first external connection battery packet 12 is with 11 parallel drive of main battery packet, first branch P1 is connected, and first switch part
S1 closure, second branch P2 are connected, and second branch P2 is in parallel by first node N1 realization with first branch P1, make main battery packet
11 and first external connection battery packet 12 combine to load node N0 provide voltage, driving load 2 running.In the process, pass through electricity
Flow sensor MT carries out the current monitoring of parallel branch, and Real-time Feedback adjusts the first external connection battery packet 12 to DCDC module 32
Output, so that load 2 is obtained stable shunt voltage.Wherein, the voltage of DCDC module 32 adjust, the electric current of current sensor MT
Monitoring and load balancing distribution etc. realize that the present invention is without limitation by the battery management system (BMS) of electric car.
Third branch is connected to load node N0 by the first external connection battery packet 12 referring to shown in shown by arrow P3.Pass through third
Branch P3, the first external connection battery packet 12 can substitute main battery packet 11, independent driving load 2.
Vehicular charger (On-Board Charger, hereinafter referred OBC module) 3 is fixedly mounted on electric car, energy
Direct current, dynamic regulation charging voltage and charging current are converted alternating current to, realizes the safety automation charging of battery pack.OBC
Module 3 is connected to third branch P3 by second node N2, plays and adjusts and provide when battery pack is charged by the first charging end 4
The effect of charging voltage.When battery pack is charged by the first charging end 4, OBC module 3 is by the first charging end 4 (such as on vehicle
Power supply plug-in unit) connection vehicle outside exchange (AC) power supply 40, AC power supplies 40 by OBC module 3 to battery pack carry out power it is smaller
Charging at a slow speed, battery pack is hereafter referred to as trickle charge by the charging process of the first charging end 4.Specifically, main battery packet 11
When trickle charge, AC power supplies 40 is by the first charging end 4, successively through OBC module 3, second node N2 and first node N1 to main battery
11 power supply of packet；When the first external connection battery 12 trickle charge of packet, AC power supplies 40 is by the first charging end 4, successively through OBC module 3 and second
Node N2 powers to the first external connection battery packet 12.The specific charging process of OBC module 3 by electric car battery management system
(BMS) it realizes, the present invention is without limitation.
In addition to through 4 trickle charge of the first charging end, battery pack charge-discharge circuit is also able to achieve battery pack and passes through the second charging end 5
Charging, to meet the charge requirement of different scenes.When battery pack is charged by the second charging end 5, the second charging end 5 (such as vehicle
On power supply plug-in unit) with the quick charge stake outside vehicle, such as DC charging pile 50 connects, and DC charging pile 50 can provide high-power straight
Galvanic electricity carries out fast-speed direct current charging to battery pack, hereafter that battery pack is referred to as fast by the charging process of the second charging end 5
It fills.Specifically, when 11 fast charge of main battery packet, DC charging pile 50 is powered by the second charging end 5 to main battery packet 11；First is external
When 12 fast charge of battery pack, DC charging pile 50 is by the second charging end 5, successively through first node N1 and second node N2 to outside first
Connect the power supply of battery pack 12.Battery management system (BMS) realization of the current/voltage management by electric car during fast charge, sheet
It invents without limitation.
Further, in some embodiments, above-mentioned battery pack charge-discharge circuit can also include one or more the
Two external connection battery packets 13 show a second external connection battery packet 13 in figure, and but not limited to this.Second external connection battery packet 13 can be with
When main battery packet 11 (and/or first external connection battery packet 12) not enough power supply directly drives load 2.For example, in some usage scenarios
In, for trailer, the first external connection battery packet 12 can be placed on car and be convenient for changing after the second external connection battery packet 13 can be hung on vehicle,
It is also convenient for realizing the decoupling of battery pack and vehicle.
Second external connection battery packet 13 can be connected to third branch P3, as depicted in figs. 1 and 2, the third section through third node N3
Point N3 is between the first external connection battery packet 12 and second node N2.To when the second external connection battery packet 13 is indirectly with load 2
When logical, the second external connection battery packet 13 can substitute main battery packet 11, successively through third node N3, second node N2 and load node
N0 independently drives load 2；When the second external connection battery 13 trickle charge of packet, AC power supplies 40 is by the first charging end 4, successively through OBC mould
Block 3, second node N2 and third node N3 power to the second external connection battery packet 13；When the second external connection battery 13 fast charge of packet, DC
Charging pile 50 is by the second charging end 5, successively through first node N1, second node N2 and third node N3 to the second external connection battery
13 power supply of packet.
Second external connection battery packet 13 also can be connected to load node N0 by separate branches P4, referring for example to Fig. 3 and Fig. 4 institute
Show.When separate branches P4 is connected, the second external connection battery packet 13 can directly drive load 2 by load node N0；When second
When external connection battery 13 trickle charge of packet, AC power supplies 40 is by the first charging end 4, successively through OBC module 3, second node N2, first node
N1 powers to the second external connection battery packet 13；When the second external connection battery 13 fast charge of packet, DC charging pile 50 passes through the second charging end 5,
Successively power through first node N1 and load node N0 to the second external connection battery packet 13.
In the battery pack charge-discharge circuit of any embodiment of that present invention, each electronic component can configure that can control it logical
Disconnected switch member.Specifically, main battery packet 11 is connected to switch member S3, and the first external connection battery packet 12 is connected to switch member S4, and second
External connection battery packet 13 is connected to switch member S5, and the second charging end 5 is connected to switch member S6.In addition, the 2, first charging end 4 of load can also be with
Switch member is configured, is not shown specifically in figure.These switch members may each comprise one or more switch elements, and switch element can be with
It is relay, contactor, electronic switch, air switch or other any type of switch elements.(electronic vapour in the initial state
Vehicle does not travel uncharged yet), default all switch members (S1~S6) and is in an off state.
The discharge control method of battery pack charge-discharge circuit is referring to Figure 5, comprising: S502, according to main battery Packet driven
Signal connects first branch P1, makes main battery packet 11 through load node N0 driving load 2；S504, according to the first external connection battery packet
Driving signal connects third branch P3, makes the first external connection battery packet 12 through load node N0 driving load 2；S506, according to parallel connection
Driving signal, first connect first branch P1, after at least through first switch part S1 connect second branch P2, make the first external connection battery
Packet 12 is through DCDC module 32 and 11 parallel drive of main battery packet load 2.And optionally, believed according to the second external connection battery Packet driven
Number, make the second external connection battery packet 13 at least through load node N0 driving load 2.Wherein, each step is not patrolling for sequence execution
The relationship of collecting, but driving signal selection executes based on the received, the main battery Packet driven signal, the first external connection battery packet drive
Dynamic signal, parallel drive signal, second external connection battery Packet driven signal etc. are sent out by the battery management system (BMS) of electric car
Out, the present invention is without limitation.
The charge control method of battery pack charge-discharge circuit is referring to shown in Fig. 6, comprising: S601, according to main battery packet second
Charging signals, connect the access between the second charging end 5 and main battery packet 11, and the second charging end 5 of driving is supplied to main battery packet 11
Electricity；S602, according to the first charging signals of main battery packet, connect the access between the first charging end 4 and main battery packet 11, driving the
One charging end 4 powers through OBC module 3 to main battery packet 11；S603, according to first the second charging signals of external connection battery packet, connect
Access between second charging end 5 and the first external connection battery packet 12, the second charging end 5 of driving are supplied to the first external connection battery packet 12
Electricity；S604, according to first the first charging signals of external connection battery packet, connect between the first charging end 4 and the first external connection battery packet 12
Access, driving the first charging end 4 power through OBC module 3 to the first external connection battery packet 12；S605, it is charged according to parallel connection second
Signal successively connects the access between the second charging end 5 and main battery packet 11 and the access between the first external connection battery packet 12；
S606, according to first charging signals in parallel, successively connect the access between the first charging end 4 and main battery packet 11 and with first outside
Connect the access between battery pack 12.And optionally, according to second the second charging signals of external connection battery packet, the second charging end is connected
5 and the second access between external connection battery packet 13, the second charging end 5 of driving power to the second external connection battery packet 13；According to second
The first charging signals of external connection battery packet, connect the access between the first charging end 4 and the second external connection battery packet 13, and driving first is filled
Electric end 4 powers through OBC module 3 to the second external connection battery packet 13.Wherein, each step is not the logical relation that sequence executes, and
Be based on the received charging signals selection execute, second charging signals of main battery packet, the first charging signals of main battery packet,
First the second charging signals of external connection battery packet, first the first charging signals of external connection battery packet, second charging signals in parallel, in parallel the
One charging signals, second the second charging signals of external connection battery packet, second first charging signals of external connection battery packet etc. are by electric car
Battery management system (BMS) issue, the present invention it is without limitation.
Specifically, as shown in connection with fig. 1, when being independently accessed main battery packet 11: switch member S3 closure (wraps electricity by monocell
Process powers on, and for specific method using existing method, the present invention is without limitation), main battery packet 11 accesses.In discharge mode
Under, first branch P1 is connected according to main battery Packet driven signal, main battery packet 11 is powered through load node N0 to load 2；It is filling
Under power mode, main battery packet 11 can realize fast charge and trickle charge by the OBC module 3 of power supply and car outside vehicle.According to main electricity
It wraps the second charging signals and is connected through switch member S6 with the charging path of S3, DC charging pile 50 passes through from the second charging end 5 in pond
The charging path is powered to main battery packet 11；According to the first charging signals of main battery packet, from the first charging end 4, through OBC module
3 connect with the charging path of switch member S3, and AC power supplies 40 is powered by the charging path to main battery packet 11.Main battery packet 11 exists
It also needs to carry out the miscellaneous functions such as heat management when charging, specifically be realized by the battery management system of electric car (BMS), the present invention couple
This is with no restrictions.
When being independently accessed the first external connection battery packet 12: wrapping electric current journey closure switch part S4, the first external electricity by monocell
12 access of pond packet.In discharge mode, third branch P3, the first external connection battery are connected according to the first external connection battery Packet driven signal
Packet 12 is powered through load node N0 to load 2；In charging mode, the first external connection battery packet 12 can also pass through the power supply outside vehicle
Fast charge and trickle charge are realized with interior OBC module 3.According to first the second charging signals of external connection battery packet, from the second charging end 5
It rises, is connected through switch member S6 with the charging path where S4, DC charging pile 50 passes through the charging path to the first external connection battery packet
12 power supplies, first switch part S1 must be disconnected when fast charge, remaining is not in the switch member on current charging path certainly
Keep initial off-state；According to first the first charging signals of external connection battery packet, from the first charging end 4, through OBC module 3
It is connected with the charging path where switch member S4, AC power supplies 40 is powered by the charging path to the first external connection battery packet 12.The
One external connection battery packet 12 also needs to carry out heat management in charging, is specifically realized by the battery management system of electric car (BMS).
When main battery packet 11 and the first external connection battery packet 12 in parallel: according to parallel drive signal, first closure switch part S3 is main
Battery pack 11 is wrapped by monocell and is electrically accessed in electric current journey；Then it is closed first switch part S1, then wraps electric current journey by monocell
Closure switch part S4 completes the first external connection battery packet 12 and accesses through DCDC module 32, realized by first node N1 and main battery
Packet 11 is in parallel.In discharge mode, main battery packet 11 and the first external connection battery packet 12 are coupled to load node N0, joint driving
Load 2.In charging mode, according to the second charging signals/the first charging signals of parallel connection in parallel, the fast of main battery packet 11 is first realized
It fills, trickle charge and heat management etc., then realizes fast charge, trickle charge and the heat management etc. of the first external connection battery packet 12.Main battery packet 11 and
The fast charge of one external connection battery packet 12 and trickle charge be not repeated to illustrate, first switch part S1 is disconnected when the first external connection battery 12 trickle charge of packet
It opens.
When being independently accessed the second external connection battery packet 13: switch member S5 wraps electric current journey by monocell and is closed, the second external electricity
13 access of pond packet.In discharge mode, third branch P3, the second external connection battery are connected according to the second external connection battery Packet driven signal
Packet 13 is powered through third node N3 and load node N0 to load 2；In charging mode, it is filled according to the second external connection battery packet second
Electric signal is connected through switch member S6 with the charging path where S5 from the second charging end 5, and DC charging pile 50 passes through the charging
Access is powered to the second external connection battery packet 13；According to second the first charging signals of external connection battery packet, from the first charging end 4, warp
OBC module 3 is connected with the charging path of switch member S5, and AC power supplies 40 is supplied by the charging path to the second external connection battery packet 13
Electricity.Second external connection battery packet 13 also needs to carry out the miscellaneous functions such as heat management in charging.
In the present embodiment battery pack charge-discharge circuit, main battery packet 11 can be independent by first branch P1 in discharge mode
Driving load 2；The first external connection battery packet 12 can be made to pass through second branch P2 when needing to improve the course continuation mileage of electric car
It is connected in parallel to first branch P1, realizes main battery packet 11 and the first external connection battery packet 12 joint driving load 2；Or the first external electricity
Load 2 can be operated alone by third branch P3 in pond packet 12；The second external connection battery packet 13 can be also accessed by third branch P3, it is real
Existing course continuation mileage further increases, and battery pack switching flexibly, is applicable in several scenes.Main battery packet 11 and in charging mode
One external connection battery packet, 12/ second external connection battery packet 13 is able to achieve fast charge and trickle charge, is independent of each other, high reliablity.
Fig. 2 shows the schematic diagrames of battery pack charge-discharge circuit in another embodiment of the present invention, referring to shown in Fig. 2, this implementation
Battery pack charge-discharge circuit includes: in example
Main battery packet 11 is connected to load node N0 through first branch P1.
First external connection battery packet 12 can be connected in parallel to the through the second branch P2 where first switch part S1 and DCDC module 32
One branch P1, second branch P2 and first branch P1 are parallel to first node N1.Alternatively, the first external connection battery packet 12 can be through third
Branch P3 is connected to load node N0.
OBC module 3 is connected to third branch P3 through second node N2.
First charging end 4, is connected to OBC module 3, and the first charging end 4 can be successively connected to through OBC module 3 with second node N2
First external connection battery packet 12, and is successively connected to main battery packet 11 with first node N1 through OBC module 3, second node N2.
Second charging end 5, can be connected to main battery packet 11, and successively be connected to outside first through first node N1 with second node N2
Connect battery pack 12.
The difference of the present embodiment and embodiment illustrated in fig. 1 is that battery pack charge-discharge circuit further includes a second switch part
S2 is connected between the first external connection battery packet 12 and second node N2；First external connection battery packet 12 can connect through the second switch part S2
Load node N0 is passed to, makes second switch part S2 that the first external connection battery packet 12 be supported to supply to load 21~23 in discharge mode
Electricity；Alternatively, the first external connection battery packet 12 can connect its fast charge access or trickle charge access through second switch part S2, make second switch
Part S2 supports 4/ second charging end 5 of the first charging end to charge the first external connection battery packet 12 in charging mode.Specifically, first
When external connection battery 12 fast charge of packet, switch member S6, second switch part S2 and switch member S4 closure, the voltage of DC charging pile 50 is from second
Charging end 5 is risen, successively through the charging path where switch member S6, first node N1, second node N2 and second switch part S2, to
The power supply of first external connection battery packet 12；When the first external connection battery 12 trickle charge of packet, second switch part S2 and switch member S4 closure, AC power supplies
40 voltage is successively logical through the charging where OBC module 3, second node N2 and second switch part S2 from the first charging end 4
Road powers to the first external connection battery packet 12.
Fig. 3 shows the schematic diagram of battery pack charge-discharge circuit in another embodiment of the present invention, referring to shown in Fig. 3, this implementation
Battery pack charge-discharge circuit includes: in example
Main battery packet 11 is connected to load node N0 through first branch P1.
First external connection battery packet 12 can be connected in parallel to the through the second branch P2 where first switch part S1 and DCDC module 32
One branch P1, second branch P2 and first branch P1 are parallel to first node N1.Alternatively, the first external connection battery packet 12 can be through third
Branch P3 is connected to load node N0.
OBC module 3 is connected to third branch P3 through second node N2.
First charging end 4, is connected to OBC module 3, and the first charging end 4 can be successively connected to through OBC module 3 with second node N2
First external connection battery packet 12, and is successively connected to main battery packet 11 with first node N1 through OBC module 3, second node N2.
Second charging end 5, can be connected to main battery packet 11, and successively be connected to outside first through first node N1 with second node N2
Connect battery pack 12.
And it is optional, the second external connection battery packet 13 is connected to load node N0 through separate branches P4.
The main distinction of the present embodiment and embodiment illustrated in fig. 1 is that DCDC module 32 is integrated in OBC mould in the present embodiment
In block (the black wire frame of overstriking in figure) 3, second node N2 is connected between DCDC module 32 and first node N1；Then second branch P2
From the first external connection battery packet 12, successively after the DCDC module 21 of first switch part S1, OBC module 3, second node N2, lead to
It crosses first node N1 and is connected in parallel to first branch P1.DCDC module 32 is integrated in OBC module 3, on the one hand can reduce circuit body
Product saves DCDC cost, the multiplexing of DCDC module 32 on the other hand may be implemented.First external connection battery packet under parallel discharge mode
12 realize, the output of DCDC module 32 adjusting first external connection battery packet 12 in parallel with main battery packet 11 by DCDC module 32, surely
Determine shunt voltage；DCDC module 32 can be respectively used to the trickle charge of each battery pack under charge mode, adjust charging voltage.To,
Do not change as far as possible and realizes that main battery packet 11 and the first external connection battery packet 12 divide on the basis of original topological structure of main battery packet 11
Not Qu Dong or joint driving make that battery pack solution is more flexible and convenient, cost performance and by the multiplexing of DCDC module 32
It is high.
Fig. 3 can be advanced optimizing based on embodiment illustrated in fig. 1, be also possible to based on embodiment illustrated in fig. 2 into
One-step optimization.By taking advanced optimizing based on embodiment illustrated in fig. 2 as an example, in a specific embodiment, OBC module 3 is adopted
With two-stage type circuit, including front stage circuits 31 and late-class circuit, the late-class circuit i.e. DCDC module 32.First switch part S1 then connects
Between front stage circuits 31 and late-class circuit 32.First switch part S1 can integrate in OBC module 3, to reduce circuit volume.
Second switch part S2 can also be integrated in OBC module 3 in the present embodiment, further reduce circuit volume.Certainly, first switch part
S1/ second switch part S2 can be placed in outside OBC module 3, be not limited with diagram.
In the present embodiment shown in control of discharge principle combination Fig. 5 and Fig. 3 of battery pack charge-discharge circuit, battery pack charge and discharge
Shown in charge control principle combination Fig. 6 and Fig. 3 of circuit.Default all switch members under original state to be in an off state.Main electricity
When pond packet 11 is independently accessed: wrapping electric current journey closure switch part S3 by monocell, main battery packet 11 accesses；It is driven according to main battery packet
Dynamic signal, connects first branch P1, makes main battery packet 11 through first branch P1 driving load 2；It is charged according to main battery packet second
Signal, connects switch member S6, and the second charging end 5 of driving powers to main battery packet 11；According to the first charging signals of main battery packet, connect
Logical first charging end 4 drives the first charging end 4 successively through the front stage circuits 31 and rear class of OBC module 3 to the access of switch member S3
Circuit 32, second node N2 and first node N1, main battery packet 11 are powered.
When being independently accessed the first external connection battery packet 12: according to the first external connection battery Packet driven signal, being first closed second switch
Part S2, then electric current journey closure switch part S4, the access of the first external connection battery packet 12 are wrapped by monocell.In discharge mode, first
External connection battery packet 12 is through the branch where second switch part S2, second node N2, first node N1 and load node N0, to load
2 power supplies；In charging mode, according to first the second charging signals of external connection battery packet, switch member S6 and second switch part S2 is connected
The access at place drives the second charging end 5 successively through switch member S6, first node N1, second node N2 and second switch part S2
It powers to the first external connection battery packet 12；According to first the first charging signals of external connection battery packet, connect outside the first charging end 4 and first
Connect the access between battery pack 12, the first charging end 4 of the driving successively front stage circuits 31 through OBC module 3 and late-class circuit 32, the
Two node N2 and second switch part S2 power to the first external connection battery packet 12.
When parallel connection access main battery packet 11 and the first external connection battery packet 12: according to parallel drive signal, first accessing main battery
Packet 11, switch member S3 wraps electric current journey by monocell and powers on, and completes main battery packet 11 and accesses；The first external connection battery packet is accessed again
12, it is first closed first switch part S1, then wrap electric current journey closure switch part S4 by monocell, it is logical to complete the first external connection battery packet 12
The DCDC module 32 for crossing OBC module 3 accesses, with 11 parallel drive of main battery packet load 2.According to the second charging signals in parallel, first
The access between the second charging end 5 and main battery packet 11 and the access between the first external connection battery packet 12 are connected afterwards, are first realized
The fast charge of main battery packet 11, then realize the fast charge of the first external connection battery packet 12.According to first charging signals in parallel, the is successively connected
Access between one charging end 4 and main battery packet 11 and the access between the first external connection battery packet 12 first realize main battery packet
11 trickle charge, then realize the trickle charge of the first external connection battery packet 12, first switch part S1 is disconnected when trickle charge.
When being independently accessed the second external connection battery packet 13: according to the second external connection battery Packet driven signal, switch member S5 is by single electricity
Electric current journey closure is wrapped in pond, and the second external connection battery packet 13 completes access；In discharge mode, the second external connection battery packet 13 is through independence
Branch P4 directly powers to load node N0；In charging mode, it according to second the second charging signals of external connection battery packet, turns on
Part S6 is closed to the access between switch member S5, the second charging end 5 successively through switch member S6, first node N1 and separate branches P4 to
The power supply of second external connection battery packet 13；According to second the first charging signals of external connection battery packet, the first charging end 4 is connected to switch member S5
Between access, the first charging end 4 successively front stage circuits 31 through OBC module 3 and late-class circuit 32, second node N2, first
Node N1 and separate branches P4 powers to the second external connection battery packet 13.
In the present embodiment battery pack charge-discharge circuit, main battery packet 11 can be independent by first branch P1 in discharge mode
Driving load 2；The first external connection battery packet 12 can be made to pass through second branch P2 when needing to improve the course continuation mileage of electric car,
DCDC module 32 through OBC module 3 is connected in parallel to first branch P1, realizes that main battery packet 11 and the first external connection battery packet 12 joint drive
Dynamic load 2；Or first external connection battery packet 12 load 2 can be operated alone by third branch P3；Separate branches P4 can also be passed through
The second external connection battery packet 13 is accessed, realizes further increasing for course continuation mileage, battery pack switching flexibly, is applicable in several scenes.?
Main battery packet 11 and 12/ second external connection battery packet 13 of the first external connection battery packet are able to achieve fast charge under charge mode, and through OBC mould
The front stage circuits 31 and rear circuit 32 of block 3 realize trickle charge, are independent of each other, high reliablity.
Also, DCDC module 32 is multiplexed the late-class circuit 32 of OBC module 3, the first external connection battery packet under parallel discharge mode
12 realize, the output of DCDC module 32 adjusting first external connection battery packet 12 in parallel with main battery packet 11 by DCDC module 32, surely
Determine shunt voltage；DCDC module 32 is respectively used to the trickle charge of each battery pack under charge mode, adjusts charging voltage.Do not changing as far as possible
Become on the basis of original topological structure of main battery packet 11 realize main battery packet 11 and the first external connection battery packet 12 respectively drive or
Joint driving, and the multiplexing of DCDC module 32 makes more flexible and convenient battery pack solution, reduction circuit volume, saving circuit
Cost, cost performance are high.
Fig. 4 shows the schematic diagram of battery pack charge-discharge circuit in another embodiment of the present invention, and Fig. 4 can be based on above-mentioned
Meaning embodiment advanced optimizes, by taking advanced optimizing based on embodiment illustrated in fig. 3 as an example, battery pack charge and discharge in the present embodiment
Circuit includes:
Main battery packet 11 is connected to load node N0 through first branch P1.
First external connection battery packet 12 can be connected in parallel to the through the second branch P2 where first switch part S1 and DCDC module 32
One branch P1, second branch P2 and first branch P1 are parallel to first node N1.Alternatively, the first external connection battery packet 12 can be through second
Third branch P3 where switch member S2 is connected to load node N0.
OBC module 3 is connected to third branch P3 through second node N2.
First charging end 4, is connected to OBC module 3, and the first charging end 4 can be successively through the front stage circuits 31 of OBC module 3 with after
Grade circuit 32, second node N2 are connected to the first external connection battery packet 12 with second switch part S2, and the prime successively through OBC module 3
Circuit 31 is connected to main battery packet 11 with late-class circuit 32, second node N2 with first node N1.
Second charging end 5, can be connected to main battery packet 11, and successively through first node N1, second node N2 and second switch
Part S2 is connected to the first external connection battery packet 12.
And optional second external connection battery packet 13, load node N0 can be connected to through separate branches P4.
The difference of the present embodiment and above-described embodiment is that first switch part S1 and/or second switch part S2 are integrated in electricity
In the PDU module of electrical automobile.PDU (Power Distribution Unit, power distribution unit) can be first switch part S1
It is encapsulated with second switch part S2, guarantees circuit safety.In Fig. 3 and embodiment shown in Fig. 4, current sensor MT can be with
It is connected with the DCDC module 32 or battery management system (BMS is not shown in the figure) of OBC module 3, carries out acquisition and the prison of electric current
It surveys.
The control of discharge principle and charge control principle and embodiment illustrated in fig. 3 of battery pack charge-discharge circuit in the present embodiment
Similarly.Load 2 can be operated alone in main battery packet 11 by first branch P1 in discharge mode；When needing to improve electric car
The first external connection battery packet 12 can be made by second branch P2 when course continuation mileage, the DCDC module 32 through OBC module 3 is connected in parallel to the
One branch P1 realizes main battery packet 11 and the first external connection battery packet 12 joint driving load 2；Or 12 energy of the first external connection battery packet
Load 2 is operated alone by third branch P3；Also the second external connection battery packet 13 can be accessed by separate branches P4, realized in continuation of the journey
Journey further increases, and battery pack switching flexibly, is applicable in several scenes.Main battery packet 11 and the first external electricity in charging mode
Pond wraps 12/ second external connection battery packet 13 and is able to achieve fast charge, and circuit 32 is realized slowly with after through the front stage circuits of OBC module 3 31
It fills, is independent of each other, high reliablity.DCDC module 32 is multiplexed the late-class circuit 32 of OBC module 3, first under parallel discharge mode outside
It is in parallel with main battery packet 11 by the realization of DCDC module 32 to connect battery pack 12, DCDC module 32 adjusts the first external connection battery packet 12
Shunt voltage is stablized in output；DCDC module 32 is respectively used to the trickle charge of each battery pack under charge mode, adjusts charging voltage.?
Do not change as far as possible and realizes that main battery packet 11 and the first external connection battery packet 12 divide on the basis of original topological structure of main battery packet 11
It Qu Dong or not combine driving, make more flexible and convenient battery pack solution, reduction circuit volume, saving circuit cost, sexual valence
Than high.First switch part S1 and second switch part S2 is packaged in PDU module simultaneously, and circuit safety grade is high.
The embodiment of the present invention also provides a kind of electric car, can configure battery pack described in above-mentioned any embodiment
Charge-discharge circuit, specific structure and charge and discharge control principle please refer to above-described embodiment, are not repeated to illustrate herein.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (12)
1. a kind of battery pack charge-discharge circuit, is configured at electric car, which is characterized in that the battery pack charge-discharge circuit packet
It includes:
Main battery packet is connected to load node through the first branch；
First external connection battery packet can be connected in parallel to described first through the second branch where a first switch part and a DCDC module
Road, the second branch and the first branch are parallel to first node；Alternatively, the first external connection battery Bao Nengjing third branch
Road is connected to the load node；
Vehicular charger is connected to the third branch through second node；
First charging end, is connected to the Vehicular charger, and first charging end can be successively through the Vehicular charger and described
Second node is connected to the first external connection battery packet, and successively through the Vehicular charger, the second node and described first
Node is connected to the main battery packet；
Second charging end can be connected to the main battery packet, described in being successively connected to through the first node with the second node
First external connection battery packet.
2. battery pack charge-discharge circuit as described in claim 1, which is characterized in that the DCDC module is integrated in described vehicle-mounted
In charger, the second node is connected between the DCDC module and the first node；
The second branch is packaged from first external connection battery, successively through the first switch part, the Vehicular charger
After the DCDC module, the second node, the first branch is connected in parallel to by the first node.
3. battery pack charge-discharge circuit as claimed in claim 2, which is characterized in that the Vehicular charger includes front stage circuits
And late-class circuit, the DCDC module are the late-class circuits, the first switch part be connected to the front stage circuits and it is described after
Between grade circuit.
4. battery pack charge-discharge circuit as claimed in claim 3, which is characterized in that the first switch part is integrated in the vehicle
It carries in charger；Alternatively, the first switch part is integrated in the PDU module of the electric car.
5. battery pack charge-discharge circuit as described in claim 1, which is characterized in that further include a second switch part, be connected to institute
It states between the first external connection battery packet and the second node.
6. battery pack charge-discharge circuit as claimed in claim 5, which is characterized in that the second switch part is integrated in the vehicle
It carries in charger；Alternatively, the second switch part is integrated in the PDU module of the electric car.
7. battery pack charge-discharge circuit as described in claim 1, which is characterized in that further include a current sensor, be connected to institute
It states between first node and the load node.
8. battery pack charge-discharge circuit as described in claim 1, which is characterized in that further include:
One or more second external connection battery packets, each second external connection battery Bao Nengjing third node are connected to the third branch
Road, the third node is between the first external connection battery packet and the second node；Alternatively, each described second is external
Battery pack is connected to the load node through separate branches.
9. battery pack charge-discharge circuit as claimed in claim 8, which is characterized in that the main battery packet, described first external
Battery pack and the second external connection battery packet are respectively connected to the switch member that can control its on-off.
10. a kind of electric car, which is characterized in that the electric car configuration is just like the described in any item electricity of claim 1-9
Pond packet charge-discharge circuit.
11. a kind of discharge control method, for controlling putting such as the described in any item battery pack charge-discharge circuits of claim 1-9
Electricity, which is characterized in that the discharge control method includes:
According to main battery Packet driven signal, the first branch is connected, drives the main battery packet through the load node negative
It carries；
According to the first external connection battery Packet driven signal, the third branch is connected, makes the first external connection battery packet through described negative
Carry node driving load；
According to parallel drive signal, first connect the first branch, after at least through the first switch part connect described second
Branch loads the first external connection battery packet through the DCDC module and the main battery packet parallel drive.
12. a kind of charge control method, for controlling filling such as the described in any item battery pack charge-discharge circuits of claim 1-9
Electricity, which is characterized in that the charge control method includes:
According to the second charging signals of main battery packet, the access between second charging end and the main battery packet, driving are connected
Second charging end powers to the main battery packet；
According to the first charging signals of main battery packet, the access between first charging end and the main battery packet, driving are connected
First charging end powers through the Vehicular charger to the main battery packet；
According to first the second charging signals of external connection battery packet, connect between second charging end and the first external connection battery packet
Access, drive second charging end to power to the first external connection battery packet；
According to first the first charging signals of external connection battery packet, connect between first charging end and the first external connection battery packet
Access, drive first charging end to power through the Vehicular charger to the first external connection battery packet；
According to second charging signals in parallel, successively connect access between second charging end and the main battery packet and with institute
State the access between the first external connection battery packet；And
According to first charging signals in parallel, successively connect access between first charging end and the main battery packet and with institute
State the access between the first external connection battery packet.
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| CN201910535975.7A CN110194078A (en) | 2019-06-20 | 2019-06-20 | Electric car, battery pack charge-discharge circuit and charge/discharge control method |
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Application publication date: 20190903 |