CN104198948A - Method for measuring self discharge of lithium battery - Google Patents
Method for measuring self discharge of lithium battery Download PDFInfo
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- CN104198948A CN104198948A CN201410453795.1A CN201410453795A CN104198948A CN 104198948 A CN104198948 A CN 104198948A CN 201410453795 A CN201410453795 A CN 201410453795A CN 104198948 A CN104198948 A CN 104198948A
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Abstract
The invention relates to a method for measuring self discharge of a lithium battery. The method includes: step 1, fully charging the lithium battery to be measured, and allowing the lithium battery to stand for a first preset time; step2, measuring a first open-circuit voltage of the lithium battery to be measured after passing the first preset time; step2, placing the lithium battery to be measured under the environmental condition of a preset temperature, and allowing the lithium battery to stand for a second preset time; step4, measuring a second open-circuit voltage of the lithium battery to be measured after passing the second preset time; and step5, calculating self discharge rate of the lithium battery to be measured according to the first open-circuit, the second preset time and the second open-circuit voltage. By the aid of the method, self discharge of the lithium battery is measured under conditions of full charge capacity and high temperature, and therefore, standing time is not only saved, but also potential problems of the lithium battery can be effectively exposed. The method is simple and quick to operate, small in time consumption, high in calculation accuracy, and is favorable for industrial popularization and application.
Description
Technical field
The present invention relates to lithium battery detection technique field, particularly a kind of measuring method of lithium battery self discharge.
Background technology
Lithium ion battery because its energy density is high, have extended cycle life, the advantage such as security is good, environmentally safe, be widely used in the numerous areas such as electric automobile, energy storage, electric tool, portable electronic.The self-discharge rate of battery claims again retention of charge, refers to that battery is under open-circuit condition, the stored electric weight of battery hold facility under certain condition.Generally speaking, self-discharge of battery performance is subject to the performance impact of electrode material, barrier film, electrolytic solution, also closely related with battery manufacturing process, production environment.After battery is made, self-discharge rate is also relevant with environment temperature, state-of-charge, cycle index, so self-discharge of battery rate influence factor is more, is the important parameter of weighing battery performance.Measure the self-discharge rate of battery, can choose bad battery is on the one hand the battery that self discharge is larger, can provide foundation for battery combo on the other hand.
The measuring method of self-discharge rate is divided into volumetric method and voltage method at present, volumetric method is to shelve by being full of electric battery the discharge capacity of measuring remaining battery after certain hour, what the method need to be grown shelves the time (being generally 1 month) and needs charging/discharging apparatus to measure the residual capacity of battery, voltage method measures the voltage difference that battery is shelved a period of time front and back, by voltage difference, carry out the self-discharge performance of characterizing battery, the method is simple, but the method also needs long shelving the time, because shorter words change in voltage of the time of shelving is not obvious, error is larger, shelve for a long time and be unfavorable for commercial production and production life cycle, also be difficult to determine the corresponding relation of voltage difference and self discharge simultaneously, therefore need a kind of measuring method of self discharge of efficiently and accurately.
Summary of the invention
Technical matters to be solved by this invention be to provide a kind of can be simply, fast, the measuring method of the lithium battery self discharge of Measurement accuracy lithium ion battery self discharge.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of measuring method of lithium battery self discharge, comprises the following steps:
Step 1: lithium battery to be measured is full of to electricity, standing first schedule time;
Step 2: after first schedule time, measure the first open-circuit voltage of lithium battery to be measured;
Step 3: lithium battery to be measured is placed under the environmental baseline of predetermined temperature to standing second schedule time;
Step 4: after second schedule time, measure the second open-circuit voltage of mesuring battary;
Step 5: according to the first open-circuit voltage, second schedule time and the second open-circuit voltage, calculate the self-discharge rate of mesuring battary.
The invention has the beneficial effects as follows: the present invention proposes passes through the self discharge of measuring battery under full electric state and high temperature, and the method has not only been saved the time of shelving, and can effectively reflect the problem that battery is potential.The method is simple and quick, elapsed time is short, accuracy in computation is high, favourablely with industry, applies.
On the basis of technique scheme, the present invention can also do following improvement.
Further, in described step 5, adopt following formula to calculate the self-discharge rate of lithium battery:
k＝(V1-V2)/t2；
Wherein, the self-discharge rate that k is lithium battery, V1 is the first open-circuit voltage, and V2 is the second open-circuit voltage, and t2 was second schedule time.
Further, described first schedule time is 1 hour to 2 hours.
Further, described predetermined temperature is 40 ℃ to 60 ℃.
Further, 24 hours to 120 hours described second schedule time.
Accompanying drawing explanation
Fig. 1 is the inventive method flow chart of steps.
Embodiment
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, be the inventive method flow chart of steps.
Embodiment 1
A measuring method for lithium battery self discharge, comprises the following steps:
Step 1: lithium battery to be measured is full of to electricity, standing first schedule time;
Step 2: after first schedule time, measure the first open-circuit voltage of lithium battery to be measured;
Step 3: lithium battery to be measured is placed under the environmental baseline of predetermined temperature to standing second schedule time;
Step 4: after second schedule time, measure the second open-circuit voltage of mesuring battary;
Step 5: according to the first open-circuit voltage, second schedule time and the second open-circuit voltage, calculate the self-discharge rate of mesuring battary.
In described step 5, adopt following formula to calculate the self-discharge rate of lithium battery:
k＝(V1-V2)/t2；
Wherein, the self-discharge rate that k is lithium battery, V1 is the first open-circuit voltage, and V2 is the second open-circuit voltage, and t2 was second schedule time.
Described first schedule time is 1 hour to 2 hours.
Described predetermined temperature is 40 ℃ to 60 ℃.
24 hours to 120 hours described second schedule time.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a measuring method for lithium battery self discharge, is characterized in that, comprises the following steps:
Step 1: lithium battery to be measured is full of to electricity, standing first schedule time;
Step 2: after first schedule time, measure the first open-circuit voltage of lithium battery to be measured;
Step 3: lithium battery to be measured is placed under the environmental baseline of predetermined temperature to standing second schedule time;
Step 4: after second schedule time, measure the second open-circuit voltage of mesuring battary;
Step 5: according to the first open-circuit voltage, second schedule time and the second open-circuit voltage, calculate the self-discharge rate of mesuring battary.
2. the measuring method of lithium battery self discharge according to claim 1, is characterized in that: the self-discharge rate that adopts following formula calculating lithium battery in described step 5:
k＝(V1-V2)/t2；
Wherein, the self-discharge rate that k is lithium battery, V1 is the first open-circuit voltage, and V2 is the second open-circuit voltage, and t2 was second schedule time.
3. the measuring method of lithium battery self discharge according to claim 1, is characterized in that: described first schedule time is 1 hour to 2 hours.
4. the measuring method of lithium battery self discharge according to claim 1, is characterized in that: described predetermined temperature is 40 ℃ to 60 ℃.
5. the measuring method of lithium battery self discharge according to claim 1, is characterized in that: 24 hours to 120 hours described second schedule time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410453795.1A CN104198948A (en) | 2014-09-09 | 2014-09-09 | Method for measuring self discharge of lithium battery |
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| CN201410453795.1A CN104198948A (en) | 2014-09-09 | 2014-09-09 | Method for measuring self discharge of lithium battery |
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| CN104198948A true CN104198948A (en) | 2014-12-10 |
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| CN201410453795.1A Pending CN104198948A (en) | 2014-09-09 | 2014-09-09 | Method for measuring self discharge of lithium battery |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105598044A (en) * | 2015-12-02 | 2016-05-25 | 杭州伯坦科技工程有限公司 | Method for effectively screening self-discharging batteries |
| CN105633472A (en) * | 2015-12-30 | 2016-06-01 | 山东精工电子科技有限公司 | Self-discharge rate consistency matching and screening method for lithium-ion battery |
| CN107430172A (en) * | 2015-03-30 | 2017-12-01 | 伊顿公司 | The battery detection apparatus and method measured using discharge pulse |
| CN108061860A (en) * | 2017-11-24 | 2018-05-22 | 上海华普汽车有限公司 | A kind of self-discharge of battery detection method and lithium battery method for sorting |
| CN108160531A (en) * | 2018-03-15 | 2018-06-15 | 惠州亿纬锂能股份有限公司 | A kind of self-discharge of battery method for separating |
| CN108287314A (en) * | 2017-12-30 | 2018-07-17 | 惠州亿纬锂能股份有限公司 | A kind of evaluation method of lithium ion battery self discharge |
| CN108562859A (en) * | 2018-06-14 | 2018-09-21 | 东莞市振华新能源科技有限公司 | The test method that lithium ion is spread in a kind of assessment lithium ion battery |
| CN108663627A (en) * | 2018-03-28 | 2018-10-16 | 维沃移动通信有限公司 | A kind of self-discharge of battery detection method and self-discharge of battery detection device |
| CN110501656A (en) * | 2018-05-18 | 2019-11-26 | 中天储能科技有限公司 | Test the method and its battery grouping method of self-discharge of battery |
| CN110542863A (en) * | 2019-08-23 | 2019-12-06 | 江西优特汽车技术有限公司 | Power battery self-discharge rate detection method |
| CN110542864A (en) * | 2019-08-23 | 2019-12-06 | 江西优特汽车技术有限公司 | Thermodynamic detection method for self-discharge rate of lithium ion battery |
| CN110707387A (en) * | 2019-09-12 | 2020-01-17 | 东莞力朗电池科技有限公司 | Self-discharge screening method for lithium iron phosphate core |
| CN112698227A (en) * | 2020-11-24 | 2021-04-23 | 合肥国轩高科动力能源有限公司 | Lithium ion battery self-discharge abnormity screening method |
| CN113064086A (en) * | 2021-03-31 | 2021-07-02 | 湖北亿纬动力有限公司 | Method, device and system for testing self-discharge rate of lithium ion battery |
| CN113296000A (en) * | 2021-03-23 | 2021-08-24 | 上海工程技术大学 | Disassembly-free lithium battery rapid detection, diagnosis and analysis system and method |
| CN113884934A (en) * | 2021-11-01 | 2022-01-04 | 湖北亿纬动力有限公司 | Lithium battery self-discharge screening method and device, electronic equipment and storage medium |
| CN116774064A (en) * | 2023-08-22 | 2023-09-19 | 宁德时代新能源科技股份有限公司 | Battery self-discharge detection method, device, equipment and storage medium |
-
2014
- 2014-09-09 CN CN201410453795.1A patent/CN104198948A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107430172A (en) * | 2015-03-30 | 2017-12-01 | 伊顿公司 | The battery detection apparatus and method measured using discharge pulse |
| CN107430172B (en) * | 2015-03-30 | 2022-03-04 | 伊顿智能动力有限公司 | Battery monitoring apparatus and method using discharge pulse measurements |
| CN105598044A (en) * | 2015-12-02 | 2016-05-25 | 杭州伯坦科技工程有限公司 | Method for effectively screening self-discharging batteries |
| CN105598044B (en) * | 2015-12-02 | 2018-05-11 | 杭州伯坦科技工程有限公司 | A kind of method of Effective selection self-discharge battery |
| CN105633472A (en) * | 2015-12-30 | 2016-06-01 | 山东精工电子科技有限公司 | Self-discharge rate consistency matching and screening method for lithium-ion battery |
| CN105633472B (en) * | 2015-12-30 | 2018-01-02 | 山东精工电子科技有限公司 | A kind of lithium ion battery self discharge rate uniformity group gas-mixing screening method |
| CN108061860A (en) * | 2017-11-24 | 2018-05-22 | 上海华普汽车有限公司 | A kind of self-discharge of battery detection method and lithium battery method for sorting |
| CN108287314A (en) * | 2017-12-30 | 2018-07-17 | 惠州亿纬锂能股份有限公司 | A kind of evaluation method of lithium ion battery self discharge |
| CN108160531B (en) * | 2018-03-15 | 2021-04-09 | 惠州亿纬锂能股份有限公司 | Battery self-discharge sorting method |
| CN108160531A (en) * | 2018-03-15 | 2018-06-15 | 惠州亿纬锂能股份有限公司 | A kind of self-discharge of battery method for separating |
| CN108663627B (en) * | 2018-03-28 | 2020-03-24 | 维沃移动通信有限公司 | Battery self-discharge detection method and battery self-discharge detection device |
| CN108663627A (en) * | 2018-03-28 | 2018-10-16 | 维沃移动通信有限公司 | A kind of self-discharge of battery detection method and self-discharge of battery detection device |
| CN110501656A (en) * | 2018-05-18 | 2019-11-26 | 中天储能科技有限公司 | Test the method and its battery grouping method of self-discharge of battery |
| CN108562859A (en) * | 2018-06-14 | 2018-09-21 | 东莞市振华新能源科技有限公司 | The test method that lithium ion is spread in a kind of assessment lithium ion battery |
| CN110542864A (en) * | 2019-08-23 | 2019-12-06 | 江西优特汽车技术有限公司 | Thermodynamic detection method for self-discharge rate of lithium ion battery |
| CN110542863A (en) * | 2019-08-23 | 2019-12-06 | 江西优特汽车技术有限公司 | Power battery self-discharge rate detection method |
| CN110707387A (en) * | 2019-09-12 | 2020-01-17 | 东莞力朗电池科技有限公司 | Self-discharge screening method for lithium iron phosphate core |
| CN112698227A (en) * | 2020-11-24 | 2021-04-23 | 合肥国轩高科动力能源有限公司 | Lithium ion battery self-discharge abnormity screening method |
| CN113296000A (en) * | 2021-03-23 | 2021-08-24 | 上海工程技术大学 | Disassembly-free lithium battery rapid detection, diagnosis and analysis system and method |
| CN113064086A (en) * | 2021-03-31 | 2021-07-02 | 湖北亿纬动力有限公司 | Method, device and system for testing self-discharge rate of lithium ion battery |
| CN113884934A (en) * | 2021-11-01 | 2022-01-04 | 湖北亿纬动力有限公司 | Lithium battery self-discharge screening method and device, electronic equipment and storage medium |
| CN116774064A (en) * | 2023-08-22 | 2023-09-19 | 宁德时代新能源科技股份有限公司 | Battery self-discharge detection method, device, equipment and storage medium |
| CN116774064B (en) * | 2023-08-22 | 2024-01-16 | 宁德时代新能源科技股份有限公司 | Battery self-discharge detection method, device, equipment and storage medium |
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Address after: 312300. B36 building, B03 building, Shishi Plaza Business Garden, Xiao Yue town, Shangyu District, Zhejiang, Shaoxing, China Applicant after: SHAOXING ANKA AUTO PARTS CO., LTD. Applicant after: Lin Daosong Address before: 312300. B36 building, B03 building, Shishi Plaza Business Garden, Xiao Yue town, Shangyu District, Zhejiang, Shaoxing, China Applicant before: Shangyu peace card trailer accessory company limited Applicant before: Lin Daosong |
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