CN108008313A - The screening technique of lithium ion battery self discharge - Google Patents
The screening technique of lithium ion battery self discharge Download PDFInfo
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- CN108008313A CN108008313A CN201711227514.0A CN201711227514A CN108008313A CN 108008313 A CN108008313 A CN 108008313A CN 201711227514 A CN201711227514 A CN 201711227514A CN 108008313 A CN108008313 A CN 108008313A
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- lithium ion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/3865—Arrangements for measuring battery or accumulator variables related to manufacture, e.g. testing after manufacture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
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- Engineering & Computer Science (AREA)
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Abstract
The invention belongs to technical field of lithium ion, and in particular to a kind of screening technique of lithium ion battery self discharge, includes the following steps：Lithium ion battery sample to be measured is provided；The lithium ion battery sample to be measured is subjected to the first constant-current constant-voltage charging work step and charges to blanking voltage U, then carries out ripening；Wherein, the blanking voltage U=3.8 4.0V；Lithium ion battery sample after the ripening is subjected to the second constant-current constant-voltage charging work step and charges to the blanking voltage U, and records charging capacity CSample；By the charging capacity CSampleWith normal capacity CMarkContrasted, determine whether the lithium ion battery sample self discharge is qualified：Work as CSample＞ CMarkWhen, the lithium ion battery sample self discharge is unqualified, works as CSample≤CMarkWhen, the lithium ion battery sample self discharge is qualified.Screening technique whole process provided by the invention is easy to operate, and screening effect is excellent, is conducive to improve the production efficiency of battery.
Description
Technical field
The invention belongs to technical field of lithium ion, and in particular to a kind of screening technique of lithium ion battery self discharge.
Background technology
If battery leave unused always without using, also can loss of electricity, this phenomenon is known as the self-discharge phenomenon of battery.From putting
Electric rate is also known as retention of charge, it refers under open-circuit condition, the holding of the electricity of battery storage under the conditions of certain environment
Ability.In general, self discharge is mainly influenced by manufacturing process, material, condition of storage, self-discharge rate is to weigh battery performance
One of major parameter.
At present, the self discharge defective products screening technique of lithium ion battery can be divided into pressure decline method and volumetric method, wherein, capacity
The testing procedure of method generally comprises the steps：(1) by the capacity of charge-discharge test battery, and battery is marked；(2)
Battery high-temperature is aged a period of time；(3) by the residual capacity of charge-discharge test battery, according to the size of loss capacity or
The ratio of residual capacity filters out the larger battery of self discharge.The shortcomings that this method, is：Needed before ageing by discharge and recharge pair
The total capacity of battery is tested and recorded, therefore, low production efficiency；Moreover, during high temperature is aged and during volume test
The volume test twice of single battery must correspond to, and otherwise can not just calculate the capacity difference of the battery, while need according to general
Capacity difference carries out corresponding with battery, is then screened again, therefore, screening process is extremely cumbersome.
The content of the invention
It is an object of the invention to overcome the above-mentioned deficiency of the prior art, there is provided a kind of screening of lithium ion battery self discharge
Method, it is intended to which it is extremely cumbersome to solve existing lithium ion battery self discharge defective products screening process, to cause the skill of low production efficiency
Art problem.
For achieving the above object, the technical solution adopted by the present invention is as follows：
The present invention provides a kind of screening technique of lithium ion battery self discharge, includes the following steps：
Lithium ion battery sample to be measured is provided；
The lithium ion battery sample to be measured is subjected to the first constant-current constant-voltage charging work step and charges to blanking voltage U, so
After carry out ripening；Wherein, the blanking voltage U=3.8-4.0V；
Lithium ion battery sample after the ripening is subjected to the second constant-current constant-voltage charging work step and charges to described cut
Only voltage U, and record charging capacity CSample；
By the charging capacity CSampleWith normal capacity CMarkContrasted, whether determine the lithium ion battery sample self discharge
It is qualified：
Work as CSample＞ CMarkWhen, the lithium ion battery sample self discharge is unqualified,
Work as CSample≤CMarkWhen, the lithium ion battery sample self discharge is qualified.
The screening technique of lithium ion battery self discharge provided by the invention, (is ended by choosing suitable voltage range
Voltage U=3.8-4.0V), the difference of different lithium ion battery sample rooms is reduced by the way of constant-current constant-voltage charging, make lithium from
The initial state of sub- battery sample reaches consistent as far as possible, and lithium ion battery sample is during ripening due to self discharge meeting
Capacitance loss is produced, the more big then capacitance loss of self discharge is bigger, therefore after ripening, will by way of constant-current constant-voltage charging
Lithium ion battery sample charges to the state before ageing, the charging capacity C of gainedSampleThat is the capacity of self-discharge of battery loss, by it
With normal capacity CMarkContrasted, it is possible to which whether the self discharge for filtering out lithium ion battery sample is qualified.Therefore, phase of the present invention
The prior art is had the following advantages that：(1) total capacity of charge-discharge test battery need not be passed through before ripening, it is only necessary to will
Battery charges to specific voltage i.e. blanking voltage U, and directly according to the charging capacity C after ageingSampleScreened, be not required to count
The capacity difference of battery is calculated, therefore the step of whole process is very simple.(2) it is not required each battery all to carry out in screening process
Distinguish, facilitate the storage and management of battery.(3) whole screening process is easy to operate, and screening effect is excellent, is conducive to improve battery
Production efficiency.
Brief description of the drawings
Fig. 1 is the selection result schematic diagram of lithium ion battery self discharge in the embodiment of the present invention 1.
Embodiment
In order to which technical problems, technical solutions and advantageous effects to be solved by the present invention are more clearly understood, below in conjunction with
Embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only explaining
The present invention, is not intended to limit the present invention.
An embodiment of the present invention provides a kind of screening technique of lithium ion battery self discharge, which includes following step
Suddenly：
S01：Lithium ion battery sample to be measured is provided；
S02：Above-mentioned lithium ion battery sample to be measured is subjected to the first constant-current constant-voltage charging work step and charges to blanking voltage
U, then carries out ripening；Wherein, the blanking voltage U=3.8-4.0V；
S03：Lithium ion battery sample after above-mentioned ripening is subjected to the second constant-current constant-voltage charging work step and charges to institute
Blanking voltage U is stated, and records charging capacity CSample；
S04：By above-mentioned charging capacity CSampleWith normal capacity CMarkContrasted, determine the lithium ion battery sample self discharge
It is whether qualified：
Work as CSample＞ CMarkWhen, the lithium ion battery sample self discharge is unqualified,
Work as CSample≤CMarkWhen, the lithium ion battery sample self discharge is qualified.
The screening technique of lithium ion battery self discharge provided in an embodiment of the present invention, by choosing suitable voltage range
(i.e. blanking voltage U=3.8-4.0V), reduces the difference of different lithium ion battery sample rooms by the way of constant-current constant-voltage charging,
The initial state of lithium ion battery sample is set as to reach consistent as possible, lithium ion battery sample is during ripening due to certainly
Electric discharge can produce capacitance loss, and the more big then capacitance loss of self discharge is bigger, therefore after ripening, passes through constant-current constant-voltage charging
Lithium ion battery sample is charged to the state before ageing, the charging capacity C of gained by modeSampleThat is the appearance of self-discharge of battery loss
Amount, by itself and normal capacity CMarkContrasted, it is possible to whether qualified filter out the self discharge of lithium ion battery sample：Work as CSample＞ CMark
When, the unqualified lithium ion battery sample self discharge is self discharge defective products, works as CSample≤CMarkWhen, the lithium ion battery sample is certainly
Qualified electric discharge is self discharge non-defective unit.
In the whole screening process of the screening technique of lithium ion battery self discharge provided in an embodiment of the present invention, ripening
It is preceding to pass through the total capacity of charge-discharge test battery, it is only necessary to battery is charged into specific voltage i.e. blanking voltage U, and
And directly according to the charging capacity C after ageingSampleScreened, be not required to calculate the capacity difference of battery；Need not be every in screening process
One battery all distinguishes, and facilitates the storage and management of battery, whole process is easy to operate, and screening effect is excellent, is conducive to
Improve the production efficiency of battery.
Specifically, in above-mentioned steps S01, lithium ion battery sample to be measured refers in lithium ion battery production process,
Preparation carries out the lithium ion battery sample that provides during self discharge screening, is not melted into such as or lithium ion battery sample of the rigidifying after.
Specifically, in above-mentioned steps S02, blanking voltage U is the specific voltage that the present invention designs, and is battery charging
The voltage to be reached afterwards, only in the voltage range, could carry out Effective selection to lithium ion battery self discharge.In this hair
In a bright preferred embodiment, blanking voltage U takes 4.0V, in the range of the value, makes lithium ion battery by constant-current constant-voltage charging
The initial state of sample is most consistent, and lithium ion battery self discharge screening effect is best.Further, in step S02, first
The step of constant-current constant-voltage charging work step, is as follows：For first 0.2C constant-current constant-voltage chargings to 4.0V, cut-off current 0.02C, shelves 10min；
For 0.2C constant-current constant-voltage chargings to 4.0V, cut-off current 0.02C, shelves 10min again.First-class constant-voltage charge work step mainly reduces
The difference of different lithium ion battery sample rooms, makes the initial state of lithium ion battery sample as reach consistent as possible, and the present invention is real
Apply in example, first-class constant-voltage charge work step has carried out constant-current constant-voltage charging process twice, that is, is repeated twice that " 0.2C constant current constant voltages fill
Electricity, even if the difference for shelving 10min " lithium ion battery sample rooms is minimum, is further added by number just to 4.0V, cut-off current 0.02C
Need not.
Specifically, it is repeated twice that " 0.2C constant-current constant-voltage chargings to 4.0V, cut-off current 0.02C, shelves the first of 10min "
Constant-voltage charge work step is flowed, then carries out ripening, hereafter in step S03, the lithium ion battery sample after ripening is again
Once " 0.2C constant-current constant-voltage chargings to 4.0V, cut-off current 0.02C, shelve the second constant-current constant-voltage charging work of 10min " for progress
Step, the state for being charged to lithium ion battery sample before ageing by the second constant-current constant-voltage charging work step must charging capacity CSampleI.e.
The capacity of self-discharge of battery loss, by itself and normal capacity CMarkContrasted, determine the self discharge of the lithium ion battery sample
It is whether qualified.Normal capacity CMarkIt can be differed according to the material system and Aging Temperature, the digestion time difference that prepare battery
Sample, and in the embodiment of the present invention, specific normal capacity CMark=60mAh, by the second constant-current constant-voltage charging work step by lithium ion
The state that battery sample charges to before ageing must charging capacity CSample：Work as CSampleDuring ＞ 60mAh, the self discharge of lithium ion battery sample is not
Qualification is self discharge defective products, works as CSampleDuring≤60mAh, the qualified lithium ion battery sample self discharge is that self discharge is good
Product, concrete outcome are as shown in Figure 1.
Further, in the screening technique of the lithium ion battery self discharge of the embodiment of the present invention, the condition of ripening
For：Temperature be 30-60 DEG C, the time for 3-7d (my god).Ripening makes self-discharge of battery produce capacitance loss, is conducive to subsequently fill
Capacitance CSampleWith normal capacity CMarkContrast.In a preferred embodiment, the condition of ripening is：Temperature is 35 DEG C,
Time is 5d.Under the Aging Temperature and digestion time, it can accurately determine that battery capacity is lost, so that and normal capacity
CMarkIt is more accurate when being contrasted.
Further, in the screening technique of the lithium ion battery self discharge of the embodiment of the present invention, the lithium ion that is screened
Battery sample can be the lithium ion battery of various models, be preferably 18650 lithium ion batteries in embodiments of the present invention.
It is of the invention successively to carry out test of many times, it is further detailed to invention progress as reference now to lift A partial experiment result
Thin description, is described in detail with reference to specific embodiment.
Embodiment 1
A kind of screening technique of lithium ion battery self discharge, includes the following steps：
(1) the lithium ion battery sample after chemical conversion is charged into 4.0V by following constant-current constant-voltage charging work step：
A, 0.2C constant-current constant-voltage chargings are to 4.0V, cut-off current 0.02C；
B, 10min is shelved；
C, 0.2C constant-current constant-voltage chargings 4.0V, cut-off current 0.02C；
D, 10min is shelved.
(2) ripening：35 DEG C of high temperature are aged 5d.
(3) lithium ion battery after ripening is charged by following work step：
A, 0.2C constant-current constant-voltage chargings record charging capacity C to 4.0V, cut-off current 0.02CSample。
(4) according to CSampleSize screened, normal capacity CMarkFor 60mAh, if CSample＞ 60mAh, the then lithium ion battery
It should screen as self discharge defective products (unqualified), if CSample≤ 60mAh, then the lithium ion battery should screen as self discharge non-defective unit
(qualification).
A collection of lithium ion battery (totally 350 samples) is screened with the screening technique, the result finally obtained such as Fig. 1
It is shown, 42 underproof samples of self discharge are filtered out by the screening technique.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of screening technique of lithium ion battery self discharge, it is characterised in that include the following steps：
Lithium ion battery sample to be measured is provided；
The lithium ion battery sample to be measured is subjected to the first constant-current constant-voltage charging work step and charges to blanking voltage U, Ran Houjin
Row ripening；Wherein, the blanking voltage U=3.8-4.0V；
Lithium ion battery sample after the ripening is subjected to the second constant-current constant-voltage charging work step and charges to the cut-off electricity
U is pressed, and records charging capacity CSample；
By the charging capacity CSampleWith normal capacity CMarkContrasted, determine whether the lithium ion battery sample self discharge closes
Lattice：
Work as CSample＞ CMarkWhen, the lithium ion battery sample self discharge is unqualified,
Work as CSample≤CMarkWhen, the lithium ion battery sample self discharge is qualified.
2. the screening technique of lithium ion battery self discharge as claimed in claim 1, it is characterised in that the blanking voltage U=
4.0V。
3. the screening technique of lithium ion battery self discharge as claimed in claim 1, it is characterised in that first constant current constant voltage
The step of charging work step, is as follows：
For first 0.2C constant-current constant-voltage chargings to 4.0V, cut-off current 0.02C, shelves 10min；
For 0.2C constant-current constant-voltage chargings to 4.0V, cut-off current 0.02C, shelves 10min again.
4. the screening technique of lithium ion battery self discharge as claimed in claim 3, it is characterised in that second constant current constant voltage
The process of charging work step is as follows：
For 0.2C constant-current constant-voltage chargings to 4.0V, cut-off current 0.02C, shelves 10min.
5. the screening technique of lithium ion battery self discharge as claimed in claim 3, it is characterised in that the normal capacity CMark=
60mAh。
6. such as the screening technique of claim 1-5 any one of them lithium ion battery self discharges, it is characterised in that the ageing
The condition of processing is：Temperature is 30-60 DEG C, time 3-7d.
7. the screening technique of lithium ion battery self discharge as claimed in claim 6, it is characterised in that the bar of the ripening
Part is：Temperature is 35 DEG C, time 5d.
8. as claim 1-5 any one of them lithium ion battery self discharges screening technique, it is characterised in that the lithium from
Sub- battery sample is 18650 lithium ion batteries.
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| CN201711227514.0A CN108008313B (en) | 2017-11-29 | 2017-11-29 | Screening method for self-discharge of lithium ion battery |
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| CN201711227514.0A CN108008313B (en) | 2017-11-29 | 2017-11-29 | Screening method for self-discharge of lithium ion battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254249A (en) * | 2018-08-21 | 2019-01-22 | 天津力神电池股份有限公司 | A kind of screening technique of Li-ion batteries piles consistency |
| CN111136033A (en) * | 2020-01-08 | 2020-05-12 | 山东精工电源科技有限公司 | Screening method for consistency of lithium ion batteries |
| CN111697271A (en) * | 2020-03-06 | 2020-09-22 | 万向一二三股份公司 | Lithium ion battery formation and capacity-dividing method |
| CN115201706A (en) * | 2022-09-14 | 2022-10-18 | 苏州时代华景新能源有限公司 | Intelligent screening method and system for lithium battery |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10164764A (en) * | 1996-11-25 | 1998-06-19 | Yamaha Motor Co Ltd | Battery capacity monitoring method |
| TW434966B (en) * | 1998-06-22 | 2001-05-16 | Nat Semiconductor Corp | Method and apparatus for monitoring the self discharge of a secondary battery upon completion of a charge cycle |
| CN102109580A (en) * | 2011-01-30 | 2011-06-29 | 白科 | Process for detecting self discharge of lithium iron phosphate battery |
| JP2012141166A (en) * | 2010-12-28 | 2012-07-26 | Yokogawa Electric Corp | Self discharge defect detection device and self discharge defect detection method |
| CN103149488A (en) * | 2011-12-06 | 2013-06-12 | 哈尔滨智木科技有限公司 | Battery defect test method and battery defect test device |
| CN103235267A (en) * | 2013-04-02 | 2013-08-07 | 江苏华富储能新技术股份有限公司 | Method for quickly and effectively comparing self-discharge rates of batteries |
| CN103364729A (en) * | 2012-03-30 | 2013-10-23 | 北汽福田汽车股份有限公司 | Detection method of battery |
| CN104090239A (en) * | 2014-06-26 | 2014-10-08 | 武汉中原长江科技发展有限公司 | Series connection lithium ion battery screening method |
| CN104090241A (en) * | 2014-07-22 | 2014-10-08 | 合肥国轩高科动力能源股份公司 | Lithium battery self-discharge screening method |
| CN105070963A (en) * | 2015-08-22 | 2015-11-18 | 河南省东雷锂电有限公司 | Method for optimizing high-magnification power lithium ion battery SEI film |
| CN105629172A (en) * | 2014-10-27 | 2016-06-01 | 中国移动通信集团甘肃有限公司 | Fault detection method and fault detection device for hybrid battery |
| CN106654420A (en) * | 2015-10-28 | 2017-05-10 | 郑州比克电池有限公司 | A lithium ion battery capacity sorting method |
-
2017
- 2017-11-29 CN CN201711227514.0A patent/CN108008313B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10164764A (en) * | 1996-11-25 | 1998-06-19 | Yamaha Motor Co Ltd | Battery capacity monitoring method |
| TW434966B (en) * | 1998-06-22 | 2001-05-16 | Nat Semiconductor Corp | Method and apparatus for monitoring the self discharge of a secondary battery upon completion of a charge cycle |
| JP2012141166A (en) * | 2010-12-28 | 2012-07-26 | Yokogawa Electric Corp | Self discharge defect detection device and self discharge defect detection method |
| CN102109580A (en) * | 2011-01-30 | 2011-06-29 | 白科 | Process for detecting self discharge of lithium iron phosphate battery |
| CN103149488A (en) * | 2011-12-06 | 2013-06-12 | 哈尔滨智木科技有限公司 | Battery defect test method and battery defect test device |
| CN103364729A (en) * | 2012-03-30 | 2013-10-23 | 北汽福田汽车股份有限公司 | Detection method of battery |
| CN103235267A (en) * | 2013-04-02 | 2013-08-07 | 江苏华富储能新技术股份有限公司 | Method for quickly and effectively comparing self-discharge rates of batteries |
| CN104090239A (en) * | 2014-06-26 | 2014-10-08 | 武汉中原长江科技发展有限公司 | Series connection lithium ion battery screening method |
| CN104090241A (en) * | 2014-07-22 | 2014-10-08 | 合肥国轩高科动力能源股份公司 | Lithium battery self-discharge screening method |
| CN105629172A (en) * | 2014-10-27 | 2016-06-01 | 中国移动通信集团甘肃有限公司 | Fault detection method and fault detection device for hybrid battery |
| CN105070963A (en) * | 2015-08-22 | 2015-11-18 | 河南省东雷锂电有限公司 | Method for optimizing high-magnification power lithium ion battery SEI film |
| CN106654420A (en) * | 2015-10-28 | 2017-05-10 | 郑州比克电池有限公司 | A lithium ion battery capacity sorting method |
Non-Patent Citations (1)
| Title |
|---|
| 刘双全: "锂电池自放电检测技术的研究与应用", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254249A (en) * | 2018-08-21 | 2019-01-22 | 天津力神电池股份有限公司 | A kind of screening technique of Li-ion batteries piles consistency |
| CN111136033A (en) * | 2020-01-08 | 2020-05-12 | 山东精工电源科技有限公司 | Screening method for consistency of lithium ion batteries |
| CN111697271A (en) * | 2020-03-06 | 2020-09-22 | 万向一二三股份公司 | Lithium ion battery formation and capacity-dividing method |
| CN115201706A (en) * | 2022-09-14 | 2022-10-18 | 苏州时代华景新能源有限公司 | Intelligent screening method and system for lithium battery |
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