CN108428956A - A kind of battery core partial volume method of lithium ion battery - Google Patents
A kind of battery core partial volume method of lithium ion battery Download PDFInfo
- Publication number
- CN108428956A CN108428956A CN201810070977.9A CN201810070977A CN108428956A CN 108428956 A CN108428956 A CN 108428956A CN 201810070977 A CN201810070977 A CN 201810070977A CN 108428956 A CN108428956 A CN 108428956A
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- CN
- China
- Prior art keywords
- battery core
- partial volume
- discharge
- battery
- lithium ion
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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
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- H01M10/4285—Testing apparatus
-
- 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
- H01M10/44—Methods for charging or discharging
- H01M10/448—End of discharge regulating measures
-
- 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
Abstract
The present invention provides a kind of battery core partial volume methods of lithium ion battery comprising：1) battery core is fully charged；2) on the open circuit voltage curve corresponding to the SOC of battery core, the maximum position of the slope of curve is found；3) discharge current and discharge time are obtained by position；4) it is discharged battery core according to discharge current and discharge time；5) voltage of battery core is surveyed.The present invention shortens partial volume discharge flow path compared to the prior art, and partial volume method is simple, can save about 40% partial volume electric energy, while partial volume flow time is greatly shortened, and can effectively improve production capacity.
Description
Technical field
The present invention relates to a kind of battery core partial volume methods, in particular to a kind of battery core partial volume method of lithium ion battery.
Background technology
In the production process of current lithium ion battery, usually it is required for carrying out partial volume to battery core, the partial volume of battery core is in fact
The process exactly screened to the actual capacity of battery, and charging are different, have the process of electric discharge that could weigh battery
Actual capacity.For example, the discharge time of 1C5 (5 be subscript) the A discharge performances required in the standard of GB/T18287-2000 is not
Less than 51 minutes, and industry was usually with 60 minutes for minimum requirements.
The partial volume of battery core is realized by grading system, and partial volume can efficiently differentiate the quality of lithium ion battery.
In current partial volume technology, the partial volume method of " surveying voltage after full charge → full electric discharge → shipment charging → stabilization " is generally used
Realize partial volume.Current this partial volume technology is disadvantageous in that the partial volume flow required time is longer, influences production effect
Rate, and power consumption is higher during partial volume, more wastes electric energy.
Invention content
In consideration of it, the present invention provides it is a kind of can effectively shorten partial volume flow time, reduce partial volume energy consumption lithium from
The battery core partial volume method of sub- battery.
The present invention provides a kind of battery core partial volume methods of lithium ion battery comprising：
1) battery core is fully charged；
2) on the open circuit voltage curve corresponding to the SOC of battery core, the maximum position of the slope of curve is found；
3) discharge current and discharge time are obtained by position；
4) it is discharged battery core according to discharge current and discharge time；
5) voltage of battery core is surveyed.
Further, above-mentioned discharge time (t) is obtained by following formula：
Discharge time (t)=(SOC of the positions 1- (A))/discharge current (I).
Further, above-mentioned discharge current (I) is the electric discharge C rates of position (A).
A kind of battery core partial volume method of lithium ion battery provided by the present invention has following excellent compared to the prior art
Point：To battery core carry out partial volume when, by battery core it is fully charged after, open circuit voltage curve is corresponded to according to battery core SOC, it is oblique to find out this curve
The larger position of rate, by this kind of battery core according to certain size of current, certain time unified electric discharge, according to the voltage after stabilization to electricity
Core carries out partial volume；Shipment charging flow thus is eliminated, while shortening partial volume discharge flow path, partial volume method is simple, can save
About 40% partial volume electric energy, while partial volume flow time is greatly shortened, production capacity can be effectively improved.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit are common for this field
Technical staff will become clear.Attached drawing only for the purpose of illustrating preferred embodiments, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 is in a kind of battery core partial volume method of lithium ion battery provided in an embodiment of the present invention corresponding to battery core SOC
Open circuit voltage curve schematic diagram；
Fig. 2 is that battery core partial volume divides with normal in a kind of battery core partial volume method of lithium ion battery provided in an embodiment of the present invention
The data degree of fitting schematic diagram of appearance.
Specific implementation mode
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
Referring to Fig. 1, a kind of battery core partial volume method of lithium ion battery provided in an embodiment of the present invention is shown in figure, is wrapped
Include following steps：
1) battery core is fully charged；
2) on the open circuit voltage curve corresponding to the SOC of battery core, the maximum position A of the slope of curve is found in SOC 30%
Near, and meet shipment requirement, therefore choose this position A as partial volume point,
3) obtain discharge current I=0.5C by position A (can choose suitable C rates, C rate values are at this as the case may be
Within the scope of the C rates of battery core design)；
Discharge time t=(1- selectes SOC)/selected electric discharge C rates, i.e. t=(1-30%)/0.5=1.4h=84mi n；
Thus discharge current and 84 minute discharge time of the partial volume discharge step using 0.5C；
4) it is discharged battery core according to discharge current I and discharge time t；
5) voltage of battery core is surveyed.
It is shown in Figure 2, after carrying out partial volume to test battery core according to above-mentioned flow, then normal partial volume is carried out, twice data
Degree of fitting is good, show that voltage range is (3821~3834.8), specifically divides several grades can be according to tool in this voltage range
Body situation carries out.
The comparison of the partial volume experimental data of the battery core of test battery core and the prior art that the present embodiment is provided is as follows：
Thus, after the partial volume method described in the present embodiment, partial volume energy consumption is reduced, and the partial volume time is contracted
It is short.
To sum up, the battery core partial volume method for a kind of lithium ion battery that the embodiment of the present invention is provided, compared to existing skill
Art has the following advantages：To battery core carry out partial volume when, by battery core it is fully charged after, open circuit voltage curve is corresponded to according to battery core SOC,
The larger position of this slope of curve is found out, by this kind of battery core according to certain size of current, certain time unified electric discharge, according to stabilization
Voltage afterwards carries out partial volume to battery core；Shipment charging flow thus is eliminated, while shortening partial volume discharge flow path, partial volume method
Simply, about 40% partial volume electric energy can be saved, while partial volume flow time is greatly shortened, production capacity can be effectively improved.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (3)
1. a kind of battery core partial volume method of lithium ion battery, which is characterized in that including：
1) battery core is fully charged；
2) on the open circuit voltage curve corresponding to the SOC of the battery core, the maximum position of the slope of curve (A) is found；
3) discharge current (I) and discharge time (t) are obtained by the position (A)；
4) it is discharged the battery core according to the discharge current (I) and the discharge time (t)；
5) voltage of the battery core is surveyed.
2. a kind of battery core partial volume method of lithium ion battery according to claim 1, which is characterized in that the discharge time
(t) it is obtained by following formula：
Discharge time (t)=(SOC of the positions 1- (A))/discharge current (I).
3. a kind of battery core partial volume method of lithium ion battery according to claim 1 or 2, which is characterized in that the electric discharge
Electric current (I) is the electric discharge C rates of the position (A).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810070977.9A CN108428956B (en) | 2018-01-25 | 2018-01-25 | Cell capacity grading method of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810070977.9A CN108428956B (en) | 2018-01-25 | 2018-01-25 | Cell capacity grading method of lithium ion battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108428956A true CN108428956A (en) | 2018-08-21 |
| CN108428956B CN108428956B (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810070977.9A Active CN108428956B (en) | 2018-01-25 | 2018-01-25 | Cell capacity grading method of lithium ion battery |
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| Country | Link |
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| CN (1) | CN108428956B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112421139A (en) * | 2020-11-27 | 2021-02-26 | 惠州亿纬锂能股份有限公司 | Production process of lithium ion battery |
| CN113176516A (en) * | 2021-03-05 | 2021-07-27 | 欣旺达电动汽车电池有限公司 | Capacity prediction method, capacity prediction device, electronic device, and storage medium |
| CN113517481A (en) * | 2021-04-08 | 2021-10-19 | 浙江超威创元实业有限公司 | Lithium battery capacity grading method |
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| CN102265171A (en) * | 2011-05-31 | 2011-11-30 | 华为技术有限公司 | Method and device for detecting configuration error of rated capacity of battery |
| CN102944849A (en) * | 2012-11-27 | 2013-02-27 | 天津力神电池股份有限公司 | Rapid battery capacity detecting method for lithium ion batteries |
| JP2014132243A (en) * | 2013-01-07 | 2014-07-17 | Toshiba Corp | Secondary battery device, residual capacity measuring method of secondary battery device, and program |
| CN104485474A (en) * | 2014-12-04 | 2015-04-01 | 上海交通大学 | Electric vehicle battery pack matching method based on coincidence indicator |
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2018
- 2018-01-25 CN CN201810070977.9A patent/CN108428956B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102265171A (en) * | 2011-05-31 | 2011-11-30 | 华为技术有限公司 | Method and device for detecting configuration error of rated capacity of battery |
| CN102944849A (en) * | 2012-11-27 | 2013-02-27 | 天津力神电池股份有限公司 | Rapid battery capacity detecting method for lithium ion batteries |
| JP2014132243A (en) * | 2013-01-07 | 2014-07-17 | Toshiba Corp | Secondary battery device, residual capacity measuring method of secondary battery device, and program |
| CN104485474A (en) * | 2014-12-04 | 2015-04-01 | 上海交通大学 | Electric vehicle battery pack matching method based on coincidence indicator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112421139A (en) * | 2020-11-27 | 2021-02-26 | 惠州亿纬锂能股份有限公司 | Production process of lithium ion battery |
| CN112421139B (en) * | 2020-11-27 | 2022-03-11 | 惠州亿纬锂能股份有限公司 | Production process of lithium ion battery |
| CN113176516A (en) * | 2021-03-05 | 2021-07-27 | 欣旺达电动汽车电池有限公司 | Capacity prediction method, capacity prediction device, electronic device, and storage medium |
| CN113517481A (en) * | 2021-04-08 | 2021-10-19 | 浙江超威创元实业有限公司 | Lithium battery capacity grading method |
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| Publication number | Publication date |
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| CN108428956B (en) | 2020-09-01 |
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