CN106910950A - A kind of battery group system and method - Google Patents
A kind of battery group system and method Download PDFInfo
- Publication number
- CN106910950A CN106910950A CN201710206057.0A CN201710206057A CN106910950A CN 106910950 A CN106910950 A CN 106910950A CN 201710206057 A CN201710206057 A CN 201710206057A CN 106910950 A CN106910950 A CN 106910950A
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- Prior art keywords
- battery pack
- cell
- battery
- electric current
- bmu
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of battery group system, including battery pack, current equalizer, balanced device, BMU and BCU；The battery pack includes multiple cells；The current equalizer is connected with the battery pack, to gather the electric current and temperature of the cell of the battery pack, and realizes that the electric current of the cell of the battery pack is consistent；The balanced device is connected with the battery pack and the BMU, and equilibrium is carried out to the battery pack with the instruction for receiving the BMU；The BMU is connected with the current equalizer, to read the electric current of the current equalizer, and sends the instruction control current equalizer and realizes that the electric current of the cell of the battery pack is consistent；The BMU is connected with the battery pack, to gather the voltage of the cell of the battery pack；The BMU is connected with the BCU, sends the total voltage of the battery pack to the BCU and receives the average voltage that the BCU sends, and then capacity to the battery pack carries out equilibrium.
Description
【Technical field】
The present invention relates to cell art, more particularly to a kind of battery group system and method.
【Background technology】
Battery in process of production due to the fluctuation of raw material and production technology, its capacity, internal resistance, voltage and self-discharge rate
Certain deviation is had, while in use also can be with the time of the increase of charge and discharge cycles number of times and storage, temperature
The influence such as degree, battery capacity also occurs different degrees of decay, so as to cause the cell in same battery pack to occur not
Unanimously.The inconsistent uneven stream for directly resulting in each cell in battery pack of the cell of battery pack, and cell
Inequality stream then can further cause the inconsistent and cell aging of monomer battery voltage, the property of final influence battery pack
Can, reduce the life-span of battery pack.
【The content of the invention】
It is an object of the invention to provide a kind of battery group system and method for slowing down cell degradation, improving battery life.
To achieve these goals, the present invention provides a kind of battery group system, including battery pack, current equalizer, balanced device,
BMU and BCU；The battery pack includes multiple cells；The current equalizer is connected with the battery pack, to gather the battery
The electric current and temperature of the cell of group, and realize that the electric current of the cell of the battery pack is consistent；The balanced device and institute
Battery pack and BMU connections are stated, equilibrium is carried out to the battery pack with the instruction for receiving the BMU；The BMU is equal with described
Stream device connection, to read the electric current of the current equalizer, and sends the monomer that the instruction control current equalizer realizes the battery pack
The electric current of battery is consistent；The BMU is connected with the battery pack, to gather the voltage of the cell of the battery pack；It is described
BMU is connected with the BCU, sends the total voltage of the battery pack to the BCU and receives the average electricity that the BCU sends
Pressure, and then capacity to the battery pack carries out equilibrium.
A kind of battery grouping method, the battery grouping method is applied to the battery group system, and the battery is in groups
Method includes：
Multiple parameters constitute a battery pack to be adjusted in the cell of preset range；
The battery pack to be adjusted is charged and discharged；
Control the current equalizer to close flow equalizing function, gather the electric current of the cell of the battery pack to be adjusted；
Send the electric current of the cell to the BMU；
Judge the electric current of the cell whether in preset range；
If the electric current of the cell is in preset range, the current equalizer is controlled to open flow equalizing function.
The battery grouping method also includes：
If not in preset range, multiple parameters constitute one to the electric current of the cell in the cell of preset range
Battery pack to be adjusted；
The battery pack to be adjusted is charged and discharged；
Control the current equalizer to close flow equalizing function, gather the electric current of the cell of the battery pack to be adjusted；
Send the electric current of the cell to the BMU；
Judge the electric current of the cell whether in preset range；
The battery grouping method also includes：
Receive the information of the battery pack；
The capacity of cell according to the information battery pack of the battery pack for receiving is with average size
It is no consistent；
If the capacity of the cell is inconsistent with average size, monomer of the control balanced device to the battery pack
The capacity of battery carries out equilibrium.
The battery grouping method also includes：
If the capacity of the cell is consistent with average size, the information of the battery pack is received；
The capacity of cell according to the information battery pack of the battery pack for receiving is with average size
It is no consistent.
The battery grouping method also includes：
Gather the total voltage of the battery pack and send to the BCU；
Send average voltage to the BMU；
Whether the total voltage for comparing the battery pack is consistent with the average voltage；
If the total voltage of the battery pack is inconsistent with the average voltage, the balanced device is controlled to the battery pack
Capacity carries out equilibrium.
The battery grouping method also includes：
If the total voltage of the battery pack is consistent with the average voltage, gathers the total voltage of the battery pack and send
To the BCU；
Send average voltage to the BMU；
Whether the total voltage for comparing the battery pack is consistent with the average voltage.
In a preferred embodiment, the parameter includes self-discharge rate, internal resistance, capacity, the carried charge of cell
And voltage.
In a preferred embodiment, described information includes voltage, electric current and the temperature of the cell of battery pack.
In a preferred embodiment, the BMU forms the battery pack according to the information of the battery pack for receiving
Cell capacity distribution table, and according to the capacity distribution table battery pack each cell in charging end
Capacity and electric discharge end capacity it is whether consistent with average size.
Battery group system provided by the present invention using reverse method cell is carried out in groups, by uniformity compared with
Good cell constitutes battery pack to be adjusted, by setting the electricity that current equalizer gathers cell in battery group system
Stream, the inconsistent cell of replacing electric current, and then the battery pack of uniformity is constituted, during battery set charge/discharge, utilize
Current equalizer is flowed to battery pack, and BMU receives the information of battery pack, when battery pack occurs inconsistent, by balanced device pair
Battery pack carries out equilibrium.
【Brief description of the drawings】
The theory diagram of the battery group system that Fig. 1 is provided for embodiment of the present invention.
The flow chart of the battery grouping method that Fig. 2 is provided for embodiment of the present invention.
【Specific embodiment】
In order that the purpose of the present invention, technical scheme and Advantageous Effects become apparent from understanding, below in conjunction with this hair
Accompanying drawing in bright implementation method, is clearly and completely described, it is clear that retouched to the technical scheme in embodiment of the present invention
The implementation method stated is only a part of implementation method of the invention, rather than whole implementation methods.Based on the reality in the present invention
Apply mode, the every other implementation method that those of ordinary skill in the art are obtained under the premise of creative work is not made,
Belong to the scope of protection of the invention.
Fig. 1 is referred to, Fig. 1 is the theory diagram of battery group system 100 provided in an embodiment of the present invention.The battery into
System system 100 includes battery pack 10, current equalizer 20, balanced device 30, BMU (Battery ManageUnit, battery management unit)
40 and BCU (Battery Control Unit, battery control unit) 50.
The battery pack 10 includes multiple cells, and the current equalizer 20 is connected with the battery pack 10, to gather
The electric current and temperature of the cell of battery pack 10 are stated, and realizes that the electric current of the cell of the battery pack 10 is consistent.It is described
Balanced device 30 is connected with the battery pack 10 and the BMU40, and the battery pack 10 is carried out with the instruction for receiving the BMU40
It is balanced.The BMU40 is connected with the current equalizer 20, and to read the electric current of the current equalizer 20, and it is described to send instruction control
Current equalizer 20 realizes that the electric current of the cell of the battery pack 10 is consistent.The BMU40 is connected with the battery pack 10, to adopt
Collect the voltage of the cell of the battery pack 10.The BMU40 is connected with the BCU50, by the total of the battery pack 10
Voltage sends the BCU50 to and receives the average voltage that the BCU50 sends, and then capacity to the battery pack 10 is carried out
It is balanced.
In the present embodiment, the current equalizer 20 and the balanced device 30 are Switching Power Supply.
Refer to Fig. 2, the flow chart of the method for the battery group system that Fig. 2 is provided for embodiments of the invention.To be said
Bright, the method for the present invention is not limited to the order of following step, and in other embodiment, the method for the present invention can be only
A portion including step as described below, or part steps therein can be deleted.
Step S01, the cell by multiple parameters in preset range constitutes a battery pack to be adjusted.Wherein, it is described
Parameter includes self-discharge rate, internal resistance, capacity, carried charge and the voltage of cell.The parameter of the multiple cell
Difference is smaller, and the uniformity of the battery pack to be adjusted is higher.
Step S02, is charged and discharged with the electric current of different multiplying to the battery pack to be adjusted.
Step S03, the BMU40 control the current equalizer 20 to close flow equalizing function, and the current equalizer 20 gathers described treating
Adjust the electric current of the cell of battery pack.The flow equalizing function of the current equalizer 20 is that the current equalizer 20 can make the battery pack
The electric current of 10 cell is consistent.
Step S04, the current equalizer 20 sends the electric current of the cell to the BMU40.
Whether step S05, the BMU40 judge the electric current of the cell in preset range.If the cell
Electric current in preset range, then the Current compliance of the cell is good, into step S06；If the electricity of the cell
Stream then needs to change cell, into step S01 not in preset range.
Step S06, the BMU40 controls the current equalizer 20 to open flow equalizing function, and then causes the battery pack 10
The electric current of cell is consistent.
Step S07, the BMU40 receive the information of the battery pack 10.Specifically, described information includes battery pack 10
The voltage of cell, electric current and temperature.The battery pack 10 is divided into the string consistent with the collection IC port numbers of the BMU40
Number, the voltage of the cell of the battery pack 10, electric current and temperature are transmitted in units of going here and there.The list of the battery pack 10
The electric current and temperature of body battery are gathered by the current equalizer 20, and the current equalizer 20 is again by the cell of the battery pack 10
Electric current and temperature information are sent to the BMU40.The voltage of the cell of the battery pack 10 is directly adopted by the BMU40
Collection.In the present embodiment, the collection IC port numbers of the BMU40 are 16.
Step S08, the BMU40 are electric according to the monomer of the information battery pack 10 of the battery pack 10 for receiving
Whether the capacity in pond is consistent with average size.Specifically, the BMU40 forms institute according to the information of the battery pack 10 for receiving
The capacity distribution table of the cell of battery pack 10 is stated, and according to each monomer electricity of the capacity distribution table battery pack 10
Pond charging end capacity and electric discharge end capacity it is whether consistent with average size, if the capacity of the cell with put down
Equal capacity is consistent, then into step S07；If the capacity of the cell is inconsistent with average size, into step S09.
Step S09, described 30 pairs of capacity of the cell of the battery pack 10 of balanced device of the BMU40 controls are carried out
Weighing apparatus.Specifically, if the capacity of the cell is less than average size, 30 pairs of cells of the balanced device fill
Electrical equalization；If the capacity of the cell is higher than average size, 30 pairs of cells of the balanced device discharge
It is balanced.In the present embodiment, the balanced device 30 can realize charge balancing or equalization discharge by the switching of a passage.
Step S10, the total voltage of the BMU40 collections battery pack 10 is simultaneously sent to the BCU50.
Step S11, the BCU50 send average voltage to the BMU40.Specifically, the BCU50 is according to multiple batteries
The total voltage of group 10 calculates the average voltage of multiple battery packs 10 and sends to the BMU40.
Whether step S12, the total voltage of the BMU40 battery packs 10 is consistent with the average voltage.If institute
The total voltage for stating battery pack 10 is consistent with the average voltage, then into step S10；If the total voltage of the battery pack 10 and institute
State average voltage inconsistent, then into step S13.
Step S13, described 30 pairs of capacity of the battery pack 10 of balanced device of the BMU40 controls carry out equilibrium.Specifically,
The BMU40 according to the total voltage of corresponding battery pack 10 and the mathematic interpolation capacity difference of the average voltage, and then to institute
The capacity for stating battery pack 10 carries out equilibrium.
Battery group system 100 provided by the present invention is carried out in groups using reverse method to cell, will be consistent
Property preferable cell constitute battery pack to be adjusted, gather monomer by setting current equalizer 20 in battery group system 100
The electric current of battery, the inconsistent cell of replacing electric current, and then the battery pack 10 of uniformity is constituted, in the discharge and recharge of battery pack 10
During, battery pack 10 is flowed using current equalizer 20, BMU40 receives the information of battery pack 10, when battery pack 10 occurs
When inconsistent, equilibrium is carried out to battery pack 10 by balanced device 30.
The present invention is not restricted to described in specification and implementation method, therefore for the personnel of familiar field
Additional advantage and modification are easily achieved, therefore in the essence of the universal limited without departing substantially from claim and equivalency range
In the case of god and scope, the present invention is not limited to specific details, representational equipment and shown here as the diagram with description
Example.
Claims (10)
1. a kind of battery group system, it is characterised in that：Including battery pack, current equalizer, balanced device, BMU and BCU；The battery
Group includes multiple cells；The current equalizer is connected with the battery pack, to gather the electricity of the cell of the battery pack
Stream and temperature, and realize that the electric current of the cell of the battery pack is consistent；The balanced device and the battery pack and the BMU
Connection, equilibrium is carried out with the instruction for receiving the BMU to the battery pack；The BMU is connected with the current equalizer, to read
The electric current of current equalizer is stated, and sends the instruction control current equalizer and realize that the electric current of the cell of the battery pack is consistent；Institute
State BMU to be connected with the battery pack, to gather the voltage of the cell of the battery pack；The BMU is connected with the BCU,
To send the total voltage of the battery pack to the BCU and receive the average voltage that the BCU sends, and then to the battery
The capacity of group carries out equilibrium.
2. a kind of battery grouping method, it is characterised in that：The battery grouping method is applied to electricity as described in claim 1
Pond group system, the battery grouping method includes：
Multiple parameters constitute a battery pack to be adjusted in the cell of preset range；
The battery pack to be adjusted is charged and discharged；
Control the current equalizer to close flow equalizing function, gather the electric current of the cell of the battery pack to be adjusted；
Send the electric current of the cell to the BMU；
Judge the electric current of the cell whether in preset range；
If the electric current of the cell is in preset range, the current equalizer is controlled to open flow equalizing function.
3. battery grouping method as claimed in claim 2, it is characterised in that：The battery grouping method also includes：
If not in preset range, multiple parameters constitute one and wait to adjust the electric current of the cell in the cell of preset range
Whole battery pack；
The battery pack to be adjusted is charged and discharged；
Control the current equalizer to close flow equalizing function, gather the electric current of the cell of the battery pack to be adjusted；
Send the electric current of the cell to the BMU；
Judge the electric current of the cell whether in preset range.
4. battery grouping method as claimed in claim 3, it is characterised in that：The battery grouping method also includes：
Receive the information of the battery pack；
According to the information battery pack of the battery pack for receiving cell capacity and average size whether one
Cause；
If the capacity of the cell is inconsistent with average size, cell of the control balanced device to the battery pack
Capacity carry out equilibrium.
5. battery grouping method as claimed in claim 4, it is characterised in that：The battery grouping method also includes：
If the capacity of the cell is consistent with average size, the information of the battery pack is received；
According to the information battery pack of the battery pack for receiving cell capacity and average size whether one
Cause.
6. battery grouping method as claimed in claim 5, it is characterised in that：The battery grouping method also includes：
Gather the total voltage of the battery pack and send to the BCU；
Send average voltage to the BMU；
Whether the total voltage for comparing the battery pack is consistent with the average voltage；
If the total voltage of the battery pack is inconsistent with the average voltage, capacity of the control balanced device to the battery pack
Carry out equilibrium.
7. battery grouping method as claimed in claim 6, it is characterised in that：The battery grouping method also includes：
If the total voltage of the battery pack is consistent with the average voltage, gathers the total voltage of the battery pack and send to institute
State BCU；
Send average voltage to the BMU；
Whether the total voltage for comparing the battery pack is consistent with the average voltage.
8. battery grouping method as claimed in claim 7, it is characterised in that：The parameter includes the self discharge of cell
Rate, internal resistance, capacity, carried charge and voltage.
9. battery grouping method as claimed in claim 7, it is characterised in that：Described information includes the cell of battery pack
Voltage, electric current and temperature.
10. battery grouping method as claimed in claim 7, it is characterised in that：The BMU is according to the battery pack for receiving
Information forms the capacity distribution table of the cell of the battery pack, and according to the capacity distribution table battery pack each
Whether cell is consistent with average size in the capacity of charging end and the capacity of electric discharge end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710206057.0A CN106910950B (en) | 2017-03-31 | 2017-03-31 | Battery grouping system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710206057.0A CN106910950B (en) | 2017-03-31 | 2017-03-31 | Battery grouping system and method |
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| Publication Number | Publication Date |
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| CN106910950A true CN106910950A (en) | 2017-06-30 |
| CN106910950B CN106910950B (en) | 2021-08-31 |
Family
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| CN201710206057.0A Active CN106910950B (en) | 2017-03-31 | 2017-03-31 | Battery grouping system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110015129A (en) * | 2017-08-31 | 2019-07-16 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic equipment |
| CN111933848A (en) * | 2020-07-30 | 2020-11-13 | 国网甘肃省电力公司电力科学研究院 | Battery grouping system based on energy storage technology |
| CN112653209A (en) * | 2020-12-10 | 2021-04-13 | 珠海格力电器股份有限公司 | Battery equalization method and device |
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| CN104993538A (en) * | 2015-07-06 | 2015-10-21 | 苏州海格新能源汽车电控系统科技有限公司 | Balancing application device and method for chargeable battery pack |
| CN105356560A (en) * | 2015-12-11 | 2016-02-24 | 上海中兴派能能源科技有限公司 | Two-stage distributed battery pack active equalization control system and method thereof |
| CN106183872A (en) * | 2016-08-15 | 2016-12-07 | 陕西赛雷博瑞新能源科技有限公司 | Homogeneity between groups control system and control method thereof in a kind of set of cells |
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| JP2014029273A (en) * | 2012-07-31 | 2014-02-13 | Mitsubishi Motors Corp | Battery pack inspection method and apparatus |
| CN104993538A (en) * | 2015-07-06 | 2015-10-21 | 苏州海格新能源汽车电控系统科技有限公司 | Balancing application device and method for chargeable battery pack |
| CN105356560A (en) * | 2015-12-11 | 2016-02-24 | 上海中兴派能能源科技有限公司 | Two-stage distributed battery pack active equalization control system and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110015129A (en) * | 2017-08-31 | 2019-07-16 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic equipment |
| CN111933848A (en) * | 2020-07-30 | 2020-11-13 | 国网甘肃省电力公司电力科学研究院 | Battery grouping system based on energy storage technology |
| CN112653209A (en) * | 2020-12-10 | 2021-04-13 | 珠海格力电器股份有限公司 | Battery equalization method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106910950B (en) | 2021-08-31 |
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Address after: 518000 3C, building 5, qiaochengfang, 4080 Qiaoxiang Road, Gaofa community, Shahe street, Nanshan District, Shenzhen, Guangdong Patentee after: Baolixin (Shenzhen) new energy technology development Co.,Ltd. Address before: 518000 workshop 101, No. 3, Shenyu science and Technology Park, No. 68, Lanjing North Road, Laokeng community, Longtian street, Pingshan District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Anding New Energy Technology Development Co.,Ltd. |
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Effective date of registration: 20220209 Address after: 214100 No. 578-4, Yanxin Road, Huishan Economic Development Zone, Wuxi City, Jiangsu Province Patentee after: Baolixin (Wuxi) Power System Co.,Ltd. Address before: 518000 3C, building 5, qiaochengfang, 4080 Qiaoxiang Road, Gaofa community, Shahe street, Nanshan District, Shenzhen, Guangdong Patentee before: Baolixin (Shenzhen) new energy technology development Co.,Ltd. |
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