CN101227014B - Method for detecting lithium ion battery airtightness - Google Patents
Method for detecting lithium ion battery airtightness Download PDFInfo
- Publication number
- CN101227014B CN101227014B CN2007100728818A CN200710072881A CN101227014B CN 101227014 B CN101227014 B CN 101227014B CN 2007100728818 A CN2007100728818 A CN 2007100728818A CN 200710072881 A CN200710072881 A CN 200710072881A CN 101227014 B CN101227014 B CN 101227014B
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- Prior art keywords
- battery
- lithium ion
- ion battery
- detecting lithium
- gas leakage
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- 238000000034 method Methods 0.000 title claims abstract description 22
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 17
- 230000002950 deficient Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- Y02P70/54—
Landscapes
- Secondary Cells (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The invention relates to a method for detecting gas tightness of lithium ion battery and the method detects the gas tightness of the battery through a standard which is preset by experiment under certain air pressure. The detection method is fit for the gas tightness detection working procedure in the battery preparation process and can detect the battery precisely, which doesn't mistake detecting the battery to generate waste and prevents the disqualified battery from entering into the next process and market simultaneously.
Description
Technical field
The present invention relates to method for detecting lithium ion battery airtightness, be specifically related to adopt negative pressure that lithium ion battery is carried out the method that air-tightness detects.
Background technology
In the lithium ion battery production process, had pair battery to carry out the step that air-tightness detects before battery injects electrolyte, this step purpose is to detect battery weld seam sealing, eliminates the defective battery of air-tightness.Usually, adopt negative pressure that battery is bled, and make gas stream through having the detection bottle of liquid, by observe detect bubble in the bottle speed judge that whether battery leaks gas.This detection method just manually judges according to the speed of bubble whether it leaks gas intuitively, and does not have quantitative criterion; This no same standard is carried out the method that sealing detects to battery can cause two kinds of adverse consequencess: 1, the little gas leakage of battery but do not influence normal use of battery and be diagnosed as bad battery; 2, the firm gas leakage battery that surpasses the gas leakage boundary line is mistaken for air tight battery, makes to exist the battery of mass defect to come into the market.
Summary of the invention
The purpose of this invention is to provide a kind of method for detecting lithium ion battery airtightness, this method can judge quantitatively that whether battery leaks gas.
Technical scheme of the present invention: method for detecting lithium ion battery airtightness comprises the steps:
A, with subatmospheric air pressure m a plurality of not sealed batteries are carried out air-tightness and detect, and write down the gas leakage speed of each battery correspondence;
B, battery is toasted;
C, inject the electrolyte into battery;
D, envelope battery liquid-filling hole;
E, battery is immersed in the water;
F, taking-up battery;
G, measure each cell thickness, and judge whether its varied in thickness scope is qualified;
H, the battery qualified according to varied in thickness are determined detected corresponding with it gas leakage velocity interval n when air-tightness detects;
I, with air pressure m down gas leakage velocity interval n be set at the air-tightness examination criteria;
J, with air pressure m down gas leakage velocity interval n battery carried out sealing detect, defective battery is eliminated, select qualified battery.
Further, described air pressure m is lower than atmospheric pressure.
Further, step b time remaining 2～30 hours, more preferably 8～20 hours; The temperature of step b is set at 50～85 ℃.
Further, between steps d and e, also have battery ageing placement, precharge step;
Further, the d step duration is not less than 3 minutes.
Further, before the g step battery was left standstill 30～60 minutes.
Beneficial effect of the present invention: battery air tightness method of testing provided by the present invention has the step of the testing standard of preestablishing, therefore can check accurately battery, promptly the qualified battery of flase drop does not cause waste, also can not cause defective battery to flow into subsequent processing even comes into the market.
Embodiment
Embodiment 1
Method for detecting lithium ion battery airtightness comprises the steps:
With the air pressure of 0.093MPa to 30 models be aluminum hull 423450 types not sealed battery carry out air-tightness and detect, and write down the gas leakage speed of each battery correspondence;
B, with 65 ℃ of temperature baking batteries 16 hours;
C, inject the electrolyte into battery;
D, envelope battery liquid-filling hole;
E, battery was immersed in the water 3 minutes;
F, take out battery, and battery was left standstill 30 minutes;
G, measure each cell thickness, and judge whether its varied in thickness scope is qualified, sees Table (1);
H, the battery qualified according to varied in thickness determine that detected corresponding with it gas leakage velocity interval was that the time difference is not less than 3.5 seconds to bubble at interval when air-tightness detected;
I, at interval to be not less than 3.5 seconds as air pressure be that 0.93MPa detects the bubble-tight standard of this size battery down the time difference with bubble.
J, with above-mentioned standard battery is carried out sealing and detect, defective battery is eliminated, select qualified battery.
Experimental data is as follows:
| ? | ? | ? | Clock) | ? |
| 1? | 0.85? | 4.49? | 4.87? | Not |
| 2? | 2.93? | 4.22? | 5.24? | Not |
| 3? | 1? | 4.33? | 4.24? | Be |
| 4? | 3.15? | 4.4? | 4.83? | Not |
| 5? | 1.2? | 4.26? | 5.04? | Not |
| 6? | 1.23? | 4.29? | 4.31? | Be |
| 7? | 1.26? | 4.62? | 4.73? | Not |
| 8? | 1.3? | 4.24? | 4.17? | Be |
| 9? | 1.5? | 4.46? | 4.47? | Be |
| 10? | 1.55? | 4.3? | 4.35? | Be |
| 11? | 1.6? | 4.3? | 4.72? | Not |
| 12? | 1.8? | 4.29? | 4.3? | Be |
| 13? | 1.85? | 4.28? | 4.24? | Be |
| 14? | 2.1? | 4.26? | 4.9? | Not |
| 15? | 2.3? | 4.5? | 4.56? | Not |
| 16? | 2.38? | 4.28? | 4.36? | Be |
| 17? | 2.54? | 4.24? | 4.29? | Be |
| 18? | 2.56? | 4.47? | 4.53? | Not |
| 19? | 2.9? | 4.23? | 4.24? | Be |
| 20? | 3.12? | 4.3? | 4.44? | Be |
| 21? | 3.5? | 4.33? | 4.35? | Be |
| 22? | 3.6? | 4.32? | 4.36? | Be |
| 23? | 3.8? | 4.27? | 4.29? | Be |
| 24? | 4.21? | 4.27? | 4.26? | Be |
| 25? | 5.1? | 4.3? | 4.34? | Be |
| 26? | 2.7? | 4.22? | 4.29? | Be |
| 27? | 3? | 4.2? | 4.25? | Be |
| 28? | 3.3? | 4.28? | 4.33? | Be |
| 29? | 3.6? | 4.28? | 4.26? | Be |
| 30? | 3.96? | 4.27? | 4.3? | Be |
Table (1)
Embodiment 2
Method for detecting lithium ion battery airtightness comprises the steps:
A, with the air pressure of 0.093MPa to 30 models be aluminum hull 423450 types not sealed battery carry out air-tightness and detect, and write down the gas leakage speed of each battery correspondence;
B, to 70 ℃ of temperature baking batteries 10 hours;
C, inject the electrolyte into battery, again with battery ageing placement, precharge
D, envelope battery liquid-filling hole;
E, battery was immersed in the water 10 minutes;
F, take out battery, and battery was left standstill 4 hours;
G, measure each cell thickness, and judge whether its varied in thickness scope is qualified, sees Table (2);
H, the battery qualified according to varied in thickness determine when air-tightness detects that the time difference is not less than 3.5 seconds to detected corresponding with it gas leakage velocity interval bubble at interval;
I, at interval to be not less than 3.5 seconds as air pressure be that 0.93MPa detects the bubble-tight standard of this size battery down the time difference with bubble.
J, with above-mentioned standard battery is carried out sealing and detect, defective battery is eliminated, select qualified battery.
Experimental data is as follows:
Table (2)
Concrete technological parameter such as detected air pressure, stoving time and temperature etc. are all identical or approximate with the technology elaboration in the battery production process among the present invention, be not limited to embodiment pressure in one's power as detected air pressure, as long as consistent with detected air pressure in the normal testing process.
Claims (7)
1. method for detecting lithium ion battery airtightness comprises the steps:
A, with subatmospheric air pressure m a plurality of not sealed batteries are carried out air-tightness and detect, and write down the gas leakage speed of each battery correspondence;
B, battery is toasted;
C, inject the electrolyte into battery;
D, envelope battery liquid-filling hole;
E, battery is immersed in the water;
F, taking-up battery;
G, measure each cell thickness, and judge whether its varied in thickness scope is qualified;
H, the battery qualified according to varied in thickness are determined detected corresponding with it gas leakage velocity interval n when air-tightness detects;
I, with air pressure m down gas leakage velocity interval n be set at the air-tightness examination criteria;
J, with air pressure m down gas leakage velocity interval n battery carried out sealing detect, defective battery is eliminated, select qualified battery.
2. method for detecting lithium ion battery airtightness according to claim 1 is characterized in that: step b time remaining 2～30 hours.
3. method for detecting lithium ion battery airtightness according to claim 2 is characterized in that: step b time remaining 8～20 hours.
4. method for detecting lithium ion battery airtightness according to claim 1, the temperature of step b are set at 50～85 ℃.
5. method for detecting lithium ion battery airtightness according to claim 1 is characterized in that: also have between steps d and e battery ageing placement, precharge step.
6. method for detecting lithium ion battery airtightness according to claim 1 is characterized in that: the e step duration is not less than 3 minutes.
7. method for detecting lithium ion battery airtightness according to claim 1 is characterized in that: before the g step battery was left standstill 30～60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100728818A CN101227014B (en) | 2007-01-19 | 2007-01-19 | Method for detecting lithium ion battery airtightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100728818A CN101227014B (en) | 2007-01-19 | 2007-01-19 | Method for detecting lithium ion battery airtightness |
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| Publication Number | Publication Date |
|---|---|
| CN101227014A CN101227014A (en) | 2008-07-23 |
| CN101227014B true CN101227014B (en) | 2011-02-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556496A (en) * | 2016-10-09 | 2017-04-05 | 深圳拓邦新能源技术有限公司 | Battery negative pressure air-tightness detection method |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914409A (en) * | 2012-08-14 | 2013-02-06 | 昆山兴能能源科技有限公司 | Method for testing air tightness quality of flexibly packaged lithium ion battery |
| CN103148990A (en) * | 2013-02-04 | 2013-06-12 | 百顺松涛（天津）动力电池科技发展有限公司 | Lithium ion battery gas tightness detecting method |
| CN105591160A (en) * | 2016-01-20 | 2016-05-18 | 山东精工电子科技有限公司 | Method for verifying package reliability of soft-package battery |
| CN106067562A (en) * | 2016-08-01 | 2016-11-02 | 东莞市安德丰电池有限公司 | The detecting system of a kind of lithium ion battery cell welding quality and detection method thereof |
| CN110427305B (en) * | 2019-08-06 | 2023-04-11 | Oppo广东移动通信有限公司 | Battery leakage processing method and device, electronic equipment and readable storage medium |
| CN110702342B (en) * | 2019-09-25 | 2021-10-01 | 广州市广珠电池有限公司 | Method for detecting low-temperature sealing performance of lithium ion battery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5287729A (en) * | 1990-06-01 | 1994-02-22 | Martin Lehmann | Method of and apparatus for a leakage testing |
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- 2007-01-19 CN CN2007100728818A patent/CN101227014B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5287729A (en) * | 1990-06-01 | 1994-02-22 | Martin Lehmann | Method of and apparatus for a leakage testing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556496A (en) * | 2016-10-09 | 2017-04-05 | 深圳拓邦新能源技术有限公司 | Battery negative pressure air-tightness detection method |
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| CN101227014A (en) | 2008-07-23 |
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Effective date of registration: 20160830 Address after: Kwai Chung street Beek Industrial Park in Longgang District of Shenzhen City, Guangdong Province, No. 6 building 518000 Patentee after: SHENZHEN BAK POWER BATTERY Co.,Ltd. Address before: Kwai Chung street Beek Industrial Park in Longgang District of Shenzhen City, Guangdong province 518119 Patentee before: SHENZHEN BAK BATTERY Co.,Ltd. |
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