CN203406389U - Battery pack parallel-connection control box of electric automobile - Google Patents

Battery pack parallel-connection control box of electric automobile Download PDF

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Publication number
CN203406389U
CN203406389U CN201320442876.2U CN201320442876U CN203406389U CN 203406389 U CN203406389 U CN 203406389U CN 201320442876 U CN201320442876 U CN 201320442876U CN 203406389 U CN203406389 U CN 203406389U
Authority
CN
China
Prior art keywords
battery
battery pack
management unit
electric automobile
contactor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201320442876.2U
Other languages
Chinese (zh)
Inventor
王霞
楼佳烽
林程峰
王炜
盛海华
赵伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wanxiang 123 Co Ltd
Original Assignee
ZHEJIANG WANXIANG YINENG POWER BATTERY Co Ltd
Wanxiang Group Corp
Wanxiang Electric Vehicle Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZHEJIANG WANXIANG YINENG POWER BATTERY Co Ltd, Wanxiang Group Corp, Wanxiang Electric Vehicle Co Ltd filed Critical ZHEJIANG WANXIANG YINENG POWER BATTERY Co Ltd
Priority to CN201320442876.2U priority Critical patent/CN203406389U/en
Application granted granted Critical
Publication of CN203406389U publication Critical patent/CN203406389U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model discloses a battery pack parallel-connection control box of an electric automobile. On the basis of increasing the driving range as much as possible, the damage caused by ring current between battery packs to batteries can be reduced, flexible control on the battery packs is realized, and the service lives of the batteries are prolonged. The battery pack parallel-connection control box comprises a battery management unit, current sensors, voltage sensors and contactors, wherein the number of the current sensors is the same as that of the battery packs, the number of the voltage sensors is the same as that of the battery packs, and the number of the contactors is the same as that of the battery packs; a positive electrode lug of each battery pack is provided with one current sensor and one voltage sensor, and the detected signal output ends of the battery packs are connected with the battery management unit; the battery packs are connected in parallel with one another after the output end of each battery pack is connected in series with an often open contact of one contactor; an input loop of each contactor is connected to an overall automobile controller of the electric automobile through a middle relay and an output relay; the battery management unit is in communication connection with the overall automobile controller.

Description

A kind of batteries of electric automobile group Parallel Control box
Technical field
The utility model relates to electrokinetic cell and connects control device, relates in particular to a kind of battery pack for electric automobile and connects control device.
Background technology
Batteries of electric automobile capacity and its continual mileage are closely related.For improving electric automobile continual mileage, meet car operation condition, general employing changes lithium battery single loop series system into multiloop parallel way, to increase electric automobile course continuation mileage.But, battery pack is in parallel use a period of time after, battery cell internal resistance changes, and battery cell itself also there are differences, thus battery cell internal resistance along with the growth of service time, its internal resistance value occurs compared with big difference, there is immediately difference in electromotive force.Therefore, cause the electromotive force between battery pack to differ larger, the more othernesses of battery pack number are larger.The battery pack that electromotive force is high can be low to electromotive force battery power discharge, so form circulation between battery pack in parallel.Equally, due to the difference of Nei Zu ﹑ electromotive force, when carrying out charge or discharge, cell group electromotive force pace of change is different, circulation between group is existed always, thereby cause battery-heating serious, accelerates cell degradation.
Within open day, be that the patent documentation that on 08 01st, 2012, publication number are CN102623661A discloses such technical scheme, a kind of connection in series-parallel power battery structure, it comprises connection supporting bracket, lower connection supporting bracket, one deck intermediate support plate at least, between upper connection supporting bracket and intermediate support plate, be provided with the first battery pack being formed by monomer battery core, intermediate support plate is provided with lower connection the second battery pack being comprised of monomer battery core between supporting bracket, upper connection supporting bracket is provided with positive plate, and positive plate is in parallel with the anodal plug-in type of monomer battery core in the first battery pack; In lower connection supporting bracket, establish negative plate, negative plate is in parallel with the negative pole plug-in type of monomer battery core in the second battery pack; Between monomer battery core in the second battery pack and monomer battery core in the first battery pack, plug-in type is connected.This technical scheme syndeton good reliability, stability is high, but its weak point is, some batteries are adopted to inserting mode parallel connection on connecting plate, because the circulation that the internal resistance of cell, electromotive force difference cause is uncontrollable, can cause battery-heating, accelerated cell degradation.
Summary of the invention
The utility model main purpose is to provide a kind of batteries of electric automobile group Parallel Control box, by pressure reduction between each parallel branch of real-time detection, and in conjunction with car load operating mode, low potential battery pack is extractd from parallel branch, to contain the serious circulation between battery pack.
The utility model is mainly solved by following technical proposals for prior art problem, a kind of batteries of electric automobile group Parallel Control box, for carrying out battery pack Parallel Control to thering is the electric automobile of a plurality of battery pack, comprise a battery management unit, the current sensor identical with battery pack quantity, the voltage sensor identical with battery pack quantity and the contactor identical with battery pack quantity, at the anode ear of each battery pack, a current sensor is installed with a voltage sensor and detection signal output is connected to battery management unit, the output of each battery pack makes connection parallel with one another between battery pack after being connected in series the normal opened contact of a contactor, the input circuit of each contactor is connected to the entire car controller of electric automobile by auxiliary relay and output relay, battery management unit communication connection entire car controller.
The technical program, in the anodal loop of each battery pack branch road, introduces contactor and controls its break-make.Battery management unit (BMU) is by detecting in real time pressure reduction, each branch current between each battery pack, and analyze relatively, result is sent to entire car controller (VCU unit), VCU controls the action of each branch road contactor on the basis that increases as far as possible continual mileage according to car load operating mode, when battery pack occurs that low pressure and pressure reduction exceed prescribed limit, this battery pack is extractd, thereby reduce the injury that circulation phenomenon causes battery.In follow-up battery maintenance, again the battery in this loop is carried out to effectively balanced maintenance.
As preferably, the sucking coil of contactor is connected to set contactor power supply by the normal opened contact of auxiliary relay, positive pole, the other end that the normal opened contact of control coil one end of auxiliary relay by output relay is connected to set auxiliary relay power supply are connected to battery management unit, and the control coil of output relay connects entire car controller.The actuating of relay of entire car controller driver output and then the action of driving auxiliary relay, auxiliary relay drives contactor action, complete the large electric current of battery pack and switch on or off operation, because battery pack is the high voltage output of several hectovolts, can not be directly as the control power supply of contactor, auxiliary relay, therefore, be provided for the contactor power supply of contactor driving and the relay power driving for relay.Control coil one end of auxiliary relay connects battery management unit, to strengthen the further protection to battery pack.
As preferably, battery management unit also connects cell Management Controller, and each battery module in battery pack connects a cell Management Controller, each cell Management Controller communication connection battery management unit.Battery pack is to be all in series according to the required voltage of vehicle and capacity by battery module; and battery module is to consist of several cells; cell management control module (LECU) carries out voltage, temperature detection and testing result is sent to battery management unit cell; battery management unit carries out electric weight estimation to each battery module and battery system, and realizes the second protection to car load battery pack.
As preferably, each cell Management Controller adopts CAN bus to be connected with battery management unit.To simplify syndeton, strengthen the reliability of transfer of data.
The beneficial effect that the utility model brings is, increasing as far as possible on the basis of continual mileage, reducing the injury that between battery pack, circulation causes battery, realizing the flexible control of battery pack, increase battery, and be conducive to battery system facilitation control and management.
Accompanying drawing explanation
Fig. 1 is a kind of theory diagram of the present utility model.
In figure: the 1st, battery pack Parallel Control box, the 2nd, battery management unit, the 3rd, current sensor, the 4th, voltage sensor, the 5th, contactor, the 6th, auxiliary relay, the 7th, output relay, the 8th, entire car controller, the 9th, battery pack, the 10th, battery module, the 11st, cell Management Controller.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is further described in detail.
Embodiment: as shown in Figure 1, the utility model is a kind of batteries of electric automobile group Parallel Control box, for carrying out battery pack Parallel Control to having the electric automobile of a plurality of battery pack.The quantity of the battery pack 9 in the present embodiment is 3, and the nominal voltage of each battery pack is 600V, and capacity is 100Ah.Anode ear in each battery pack 9 is installed a current sensor 3 and a voltage sensor 4, the output of the output of each current sensor 3 and each voltage sensor 4 is connected respectively to battery management unit 2, the output of each battery pack 9 makes the connection parallel with one another of each battery pack 9 after being connected in series contactor 5 normal opened contacts, after the normal opened contact of the sucking coil serial connection auxiliary relay 6 of each contactor 9, connects contactor power supply A+ and power supply ground; After the normal opened contact of the control coil of auxiliary relay 6 by output relay 7, connect relay power B+ and battery management unit 2, by battery management unit 2 control connection power supply ground, and the connection that keeps power supply ground under battery pack noncritical failure state, and when catastrophe failure appears in battery pack, disconnect and being connected of power supply ground, make the contactor 5 can not closure; The control coil of output relay 7 connects entire car controller 8 and power supply ground; Between battery management unit 2 and entire car controller 8, adopt port to be connected; The voltage sensor of each cell Management Controller 11 and temperature sensor correspondence are arranged on a battery module 10, detect voltage, the temperature parameter of cell in battery module, each cell Management Controller 11 adopts CAN bus to communicate and be connected with battery management unit 2.
Battery management unit 2 detects the voltage and current of each battery pack 9 in real time, relatively, after judgement, result is sent to entire car controller 8, entire car controller 8 is controlled the action of each contactor 5 on the basis that increases as far as possible continual mileage according to car load operating mode, when finding that certain battery pack occurs that voltage and pressure reduction exceed prescribed limit, this battery pack is extractd, and use other battery pack to continue operation.In follow-up battery maintenance, again the battery pack picked-offing is carried out to effectively balanced maintenance.

Claims (4)

1. a batteries of electric automobile group Parallel Control box, for carrying out battery pack Parallel Control to thering is the electric automobile of a plurality of battery pack, it is characterized in that: comprise battery management unit, the current sensor identical with battery pack quantity, the voltage sensor identical with battery pack quantity and the contactor identical with battery pack quantity, the anode ear end of the battery pack described in each is installed a current sensor with a voltage sensor and detection signal output is connected to described battery management unit, the output of each battery pack makes connection parallel with one another between battery pack after being connected in series the normal opened contact of a contactor, the coil input circuit of each contactor is connected to the entire car controller of electric automobile by auxiliary relay and output relay, described battery management unit communicates to connect described entire car controller.
2. a kind of batteries of electric automobile group Parallel Control box according to claim 1, it is characterized in that: the sucking coil of described contactor is connected to set contactor power supply by the normal opened contact of described auxiliary relay, positive pole, the other end that the normal opened contact of control coil one end of described auxiliary relay by described output relay is connected to set auxiliary relay power supply are connected to battery management unit, and the control coil of described output relay connects described entire car controller.
3. according to a kind of batteries of electric automobile group Parallel Control box described in claim 1 or 2, it is characterized in that: described battery management unit also connects cell Management Controller, each battery module in battery pack connects a described cell Management Controller, and each cell Management Controller communicates to connect described battery management unit.
4. a kind of batteries of electric automobile group Parallel Control box according to claim 3, is characterized in that: described in each, cell Management Controller adopts CAN bus to be connected with described battery management unit.
CN201320442876.2U 2013-07-24 2013-07-24 Battery pack parallel-connection control box of electric automobile Expired - Fee Related CN203406389U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320442876.2U CN203406389U (en) 2013-07-24 2013-07-24 Battery pack parallel-connection control box of electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320442876.2U CN203406389U (en) 2013-07-24 2013-07-24 Battery pack parallel-connection control box of electric automobile

Publications (1)

Publication Number Publication Date
CN203406389U true CN203406389U (en) 2014-01-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105515087A (en) * 2015-11-20 2016-04-20 浙江超威创元实业有限公司 Modularized lithium battery pack and electric car
CN108376806A (en) * 2018-02-05 2018-08-07 孙庆 A kind of low cost solves the protection system of current-carrying hidden danger on cell parallel circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105515087A (en) * 2015-11-20 2016-04-20 浙江超威创元实业有限公司 Modularized lithium battery pack and electric car
CN108376806A (en) * 2018-02-05 2018-08-07 孙庆 A kind of low cost solves the protection system of current-carrying hidden danger on cell parallel circuit

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: WANXIANG A123 SYSTEMS CO., LTD.

Free format text: FORMER NAME: ZHEJIANG WANXIANG YINENG POWER BATTERY CO., LTD.

CP01 Change in the name or title of a patent holder

Address after: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No.

Patentee after: Universal A 1 System Co., Ltd

Patentee after: Wanxiang Electric Vehicle Co., Ltd.

Patentee after: Wanxiang Group Corporation

Address before: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No.

Patentee before: ZHEJIANG WANXIANG YINENG POWER BATTERY CO., LTD.

Patentee before: Wanxiang Electric Vehicle Co., Ltd.

Patentee before: Wanxiang Group Corporation

Address after: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No.

Patentee after: Universal A 1 System Co., Ltd

Patentee after: Wanxiang Electric Vehicle Co., Ltd.

Patentee after: Wanxiang Group Corporation

Address before: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No.

Patentee before: ZHEJIANG WANXIANG YINENG POWER BATTERY CO., LTD.

Patentee before: Wanxiang Electric Vehicle Co., Ltd.

Patentee before: Wanxiang Group Corporation

C56 Change in the name or address of the patentee
CP03 Change of name, title or address

Address after: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang District, No. two road, building No. 855, No.

Patentee after: Wanxiang 123 Co Ltd

Patentee after: Wanxiang Electric Vehicle Co., Ltd.

Patentee after: Wanxiang Group Corporation

Address before: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No.

Patentee before: Universal A 1 System Co., Ltd

Patentee before: Wanxiang Electric Vehicle Co., Ltd.

Patentee before: Wanxiang Group Corporation

Address after: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang District, No. two road, building No. 855, No.

Patentee after: Wanxiang 123 Co Ltd

Patentee after: Wanxiang Electric Vehicle Co., Ltd.

Patentee after: Wanxiang Group Corporation

Address before: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No.

Patentee before: Universal A 1 System Co., Ltd

Patentee before: Wanxiang Electric Vehicle Co., Ltd.

Patentee before: Wanxiang Group Corporation

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140122

Termination date: 20190724