CN203135492U - Battery-module equalization apparatus and battery pack - Google Patents

Battery-module equalization apparatus and battery pack Download PDF

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Publication number
CN203135492U
CN203135492U CN201320068719XU CN201320068719U CN203135492U CN 203135492 U CN203135492 U CN 203135492U CN 201320068719X U CN201320068719X U CN 201320068719XU CN 201320068719 U CN201320068719 U CN 201320068719U CN 203135492 U CN203135492 U CN 203135492U
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Prior art keywords
battery
signal transmission
control chip
battery module
main control
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CN201320068719XU
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Chinese (zh)
Inventor
赵彪
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Microvast Power Systems Co Ltd
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Microvast Power Systems Co Ltd
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    • 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 provides a battery-module equalization apparatus and a battery pack. The battery-module equalization apparatus comprises a master control chip, a first signal transmission channel, a second signal transmission channel, a plurality of battery-information sampling apparatuses and a plurality of battery equalization apparatuses. Every battery module is electrically connected with one battery-information sampling apparatus and one battery equalization apparatus respectively. The plurality of battery-information sampling apparatuses are communicated with the master control chip by the first signal transmission channel. The plurality of battery equalization apparatuses are communicated with the master control chip by the second signal transmission channel.

Description

Battery module balancer and power brick
[technical field]
The utility model relates to a kind of battery module balancer, and a kind of power brick that adopts this balancer.
[background technology]
Along with petroleum resources reduce day by day and the pollution of environment day by day serious, the protection environment, energy-saving and emission-reduction have become present trend and trend in the world.Under this background, the research about new forms of energy in recent years day by day comes into one's own.In the research of new energy field, energy storage technology occupies core status, no matter be the motor vehicle of development reduction of discharging or zero discharge, still develop green energy resources such as solar energy, wind energy, its sixty-four dollar question is exactly how energy to be stored, at present, aspect electric automobile, mainly rely on battery as energy-storage travelling wave tube, aspect the electrical network energy storage, also day by day increase for the research of carrying out being undertaken by battery the peak load shifting energy storage.
At present, the main selection of electric automobile power battery is lithium ion battery, and traditional lithium ion battery comprises 18650 types and 26650 type cylindrical batteries.And because the power brick energy storage of electric automobile is huge, often need into hundred in addition thousands of battery cells constitute.So the constituted mode of batteries of electric automobile bag adopts often with battery module of dozens of~tens battery cell formation in parallel, a plurality of battery modules are combined constitutes a power brick again.
Adopt the power brick of this set to have a problem demanding prompt solution: i.e. the equalization problem of a plurality of battery modules in the power brick, because in actual applications, has fine difference (voltage owing to have some parameter between the battery cell, internal resistance, SOC etc.), make and be actually not identical between the battery module in the power brick, when using beginning, just has some small parameter difference (voltage between these battery modules, electric current, internal resistance, SOC etc.), and along with the increase of service time, under the situation of the non-uniform temperature of power brick internal environment, the difference between battery cell and the battery module can be increasing.If let go unchecked for these difference, then can cause serious consequence, even cause accidents such as on fire, blast.So, in this power brick that is constituted by a plurality of battery modules, generally all be provided with the battery module balancer, traditional battery module balancer and the BMS sampling module of battery pack share same road CAN bus and obtain the cell data that the BMS sampling module uploads to be arranged on the CAN bus and judge and need balanced module carry out equilibrium.
In above-mentioned this traditional battery module balancer, all BMS sampling modules and balance module are all on same bus, particularly in high-tension battery system, the CAN number of nodes much causes the CAN communication to crowd and makes communication failure increase greatly.Influence the operation of whole system even can't move.
In addition, in above-mentioned this traditional battery module balancer, a signalling channel (a CAN bus) only is set, all battery module parameters are all transmitted by this bars passage; When the battery module number is more, produce easily problems such as mistake or data obstruction owing to data are more, and and then have influence on the portfolio effect of battery module, influence the reliability of power brick; On the other hand, because a control chip all is set in each battery module, the structure of entire cell balancer and even entire cell bag is comparatively complicated, and cost is also higher.
[utility model content]
The technical problem that this practicality will solve is: provide a kind of collective analysis to calculate and control, cooperate the distributed execution battery module equalizing system of distributed capture BMS system.
Another technical problem that this practical information will solve is: provide a kind of full-automatic balanced manpower-free to safeguard the service-strong power brick.
In order to address the above problem, the utility model at first provides a kind of battery module balancer, and its technical scheme that adopts is:
A kind of battery module balancer, be used for having in the power brick of a plurality of battery modules, the battery module balancer comprises: main control chip, first signal transmission passage, secondary signal transmission channel, a plurality of battery information sampling apparatus, a plurality of battery balanced device; Described each battery module is electrically connected with a battery information sampling apparatus and a battery balanced device respectively, described a plurality of battery information sampling apparatus all communicates by first signal transmission passage and main control chip, and described a plurality of battery balanced devices all communicate by secondary signal transmission channel and main control chip.
As optimized technical scheme, described battery information sampling apparatus is cell Management Controller (LECU).
As optimized technical scheme, described first signal transmission passage and secondary signal transmission channel are the CAN bus structures.
In the utility model, the battery module parameter information that the battery information sampling apparatus is measured gained transfers to main control chip by first signal transmission passage, send the gained result to each battery balanced device by the secondary signal transmission channel after the main control chip unified calculation, described each battery balanced device is carried out balanced to each battery module according to the result of calculation of main control chip, simultaneously owing to adopt make that the data of sampling are more accurate separating of function and equalization function.At last, owing to adopt the processing of data and the calculating of equilibrium condition all to finish by main control unit is concentrated, the complexity of the balancer of the single main control chip of this employing obviously will be lower than the complexity of the balancer in the conventional art.
The utility model also provides a kind of power brick, and its technical scheme that adopts is:
A kind of power brick, it comprises a plurality of battery modules; It also comprises as any described battery module balancer in the above-mentioned technical scheme.
As optimized technical scheme, in described power brick, also be provided be used to the resistance wire that releases energy.
Owing to adopted battery balanced module of the present utility model, so power brick of the present utility model has non-maintaining function, greatly reduced the on-site maintenance labour cost; Owing to adopted distributed sampling and balance module, the maintenance efficiency of system is greatly improved.
[description of drawings]
Fig. 1 is the schematic diagram with power brick one embodiment of this balance module;
Wherein: 1. power brick; 2. main control chip; 3. battery module; 4. battery information sampling apparatus; 5. battery balanced device,
6. first signal transmission passage; 7. secondary signal transmission channel.
[embodiment]
Power brick balancer embodiment:
A kind of battery module balancer, be used for having in the power brick of a plurality of battery modules 3, described balancer comprises: main control chip 2, first signal transmission passage 6, secondary signal transmission channel 7, a plurality of battery information sampling apparatuses 4 and a plurality of battery balanced device 5.
Described each battery module 3 all is electrically connected with a battery information sampling apparatus 4 and a battery balanced device 5.
Described each battery information sampling apparatus 4 all communicates with main control chip 2 by first signal transmission passage 6; Described each battery balanced device 5 all communicates by secondary signal transmission channel 7 and main control chip 2.
In the present embodiment, described main control chip 2 is BMU(Battery Management Unit), described first signal transmission passage 6 and secondary signal transmission channel 7 are the CAN bus structures, described battery information sampling apparatus 4 is cell Management Controller (LECU,<Battery management controller 〉).
Power brick embodiment with this balancer
As schematically shown in Figure 1: a kind of battery module balancer, be used for having in the power brick of a plurality of battery modules 3, described balancer comprises: main control chip 2, first signal transmission passage 6, secondary signal transmission channel 7, a plurality of battery information sampling apparatuses 4 and a plurality of battery balanced device 5.
Described each battery module 3 all is electrically connected with a battery information sampling apparatus 4 and a battery balanced device 5.
Described each battery information sampling apparatus 4 all communicates with main control chip 2 by first signal transmission passage 6; Described each battery balanced device 5 all communicates by secondary signal transmission channel 7 and main control chip 2.
In the present embodiment, described main control chip 2 is BMU(Battery Management Unit), described first signal transmission passage 6 and secondary signal transmission channel 7 are the CAN bus structures, described battery information sampling apparatus 4 is cell Management Controller (LECU,<Battery management controller 〉).
In use, each LECU reads the various parameter (voltages in the battery module 3, SOC, internal resistance etc.) and with these parameters be transferred in the main control chip 2 by CAN passage 6, main control chip 2 is judged the state of each battery module 3 according to the reduced parameter that pre-sets, and make judged result (for example this battery module need charge or discharge), judged result information transfers to each battery balanced device 5 by CAN passage 7, the object information that provides according to main control chip of each battery balanced device 5 charges or discharge operation to the battery module 3 of appointment then, thereby makes battery module 3 reach equilibrium state.
Protection range of the present utility model is not limited in above-described embodiment, and all variations of doing under the utility model spirit and change all should drop within the utility model protection range.

Claims (4)

1. battery module balancer, be used for having in the power brick of a plurality of battery modules, it is characterized in that: the battery module balancer comprises: main control chip, first signal transmission passage, secondary signal transmission channel, a plurality of battery information sampling apparatus, a plurality of battery balanced device; Described each battery module is electrically connected with a battery information sampling apparatus and a battery balanced device respectively, described a plurality of battery information sampling apparatus all communicates by first signal transmission passage and main control chip, and described a plurality of battery balanced devices all communicate by secondary signal transmission channel and main control chip.
2. battery module balancer as claimed in claim 1, it is characterized in that: described battery information sampling apparatus is cell Management Controller (LECU).
3. battery module balancer as claimed in claim 1 or 2, it is characterized in that: described first signal transmission passage and secondary signal transmission channel are the CAN bus structures.
4. power brick, it comprises a plurality of battery modules; It is characterized in that: it also comprises as any described battery module balancer in the claim 1~3.
CN201320068719XU 2013-02-02 2013-02-02 Battery-module equalization apparatus and battery pack Active CN203135492U (en)

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Application Number Priority Date Filing Date Title
CN201320068719XU CN203135492U (en) 2013-02-02 2013-02-02 Battery-module equalization apparatus and battery pack

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Application Number Priority Date Filing Date Title
CN201320068719XU CN203135492U (en) 2013-02-02 2013-02-02 Battery-module equalization apparatus and battery pack

Publications (1)

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CN203135492U true CN203135492U (en) 2013-08-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104600377A (en) * 2013-10-24 2015-05-06 罗伯特·博世有限公司 Electrochemical energy storage device and method for controlling a cell module in an electrochemical energy storage device
CN109435759A (en) * 2017-08-31 2019-03-08 比亚迪股份有限公司 Battery information collector, battery equalization system, vehicle, method and storage medium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104600377A (en) * 2013-10-24 2015-05-06 罗伯特·博世有限公司 Electrochemical energy storage device and method for controlling a cell module in an electrochemical energy storage device
CN104600377B (en) * 2013-10-24 2019-11-22 罗伯特·博世有限公司 The method of electrochemical energy accumulator and the battery module in manipulation electrochemical energy accumulator
CN109435759A (en) * 2017-08-31 2019-03-08 比亚迪股份有限公司 Battery information collector, battery equalization system, vehicle, method and storage medium

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GR01 Patent grant
C56 Change in the name or address of the patentee
CP02 Change in the address of a patent holder

Address after: 313000 Huzhou economic and Technological Development Zone, Zhejiang, Hung Fung Road, No. 2198

Patentee after: Microvast Power System (Huzhou) Co., Ltd.

Address before: 313000 Zhejiang Province, Huzhou City Road No. 1555 sunny Industrial Science and Technology Park 1

Patentee before: Microvast Power System (Huzhou) Co., Ltd.