CN107631844A - A kind of method for conducting leak test of soft package lithium battery - Google Patents
A kind of method for conducting leak test of soft package lithium battery Download PDFInfo
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- CN107631844A CN107631844A CN201610564127.5A CN201610564127A CN107631844A CN 107631844 A CN107631844 A CN 107631844A CN 201610564127 A CN201610564127 A CN 201610564127A CN 107631844 A CN107631844 A CN 107631844A
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- battery
- helium
- vacuum storehouse
- leak test
- soft package
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Abstract
The present invention relates to lithium ion battery preparation field, discloses a kind of method for conducting leak test of soft package lithium battery, comprises the following steps：（1）Battery liquid-filling：Electrolyte is irrigated into battery battery core；（2）Evacuate：Battery is vacuumized in vacuum storehouse after fluid injection；（3）Note helium：The helium injection gas into vacuum storehouse, make to be filled with helium in battery battery core, then battery core is sealed；（4）Evacuate helium inspection:By in battery transfer to another vacuum storehouse, and the battery core for clamping with fixture battery is pressurizeed, and then starts to vacuumize, helium content in detection vacuum storehouse.The soft package lithium battery method for conducting leak test of the present invention will not damage to battery, can realize 100% full inspection, and detection accuracy is high, and cost is relatively low.
Description
Technical field
The present invention relates to lithium ion battery preparation field, more particularly to a kind of method for conducting leak test of soft package lithium battery.
Background technology
Soft package lithium battery sealing, it is one of important indicator for weighing battery performance.Good sealing ensure that battery
In use, air tight, leakage, flatulence.
In the prior art, typically resisted in process of production by the heat-sealing thickness and aluminum plastic film that detect lithium ion battery
Tensile strength, to detect battery hermetization.But during actually detected, real air leakage point is difficult by sealing thickness
Detected and judged with tensile strength.There is planing surface detection in addition, still, the detection of in general planing surface belongs to destructive inspection
Survey, sampling observation can only be used as, product full inspection can not be carried out.
Therefore, after summary, there is following lack in the method for conducting leak test of the soft bag lithium ionic cell of prior art
Point：
1st, seal thickness and tensile strength can not reaction heat completely be sealed sealing property.
2nd, because there is a tab, thickness fluctuation is big for lug position, it is impossible to passes through actual heat-sealing Thickness sensitivity sealing.
3rd, heat-sealing Thickness sensitivity can not realize 100% full inspection.
4th, seal planing surface detection and belong to destructive detection, full inspection can not be carried out.
5th, a large amount of manpower and materials are expended, serious deformation can occur for soft-package battery.
The content of the invention
In order to solve the above-mentioned technical problem, the invention provides a kind of method for conducting leak test of soft package lithium battery.This hair
Bright soft package lithium battery method for conducting leak test will not damage to battery, can realize 100% full inspection, and detection accuracy
Height, cost are relatively low.
The present invention concrete technical scheme be：A kind of method for conducting leak test of soft package lithium battery, comprises the following steps：
（1）Battery liquid-filling：Electrolyte is irrigated into battery battery core.
（2）Evacuate：Battery is vacuumized in vacuum storehouse after fluid injection.
（3）Note helium：The helium injection gas into vacuum storehouse, make to be filled with helium in battery battery core, then battery core is sealed.
（4）Evacuate helium inspection:By in battery transfer to another vacuum storehouse, and the battery core for clamping with fixture battery is pressurizeed,
Then start to vacuumize, helium content in detection vacuum storehouse.
In the inventive solutions, evacuated after battery liquid-filling, be then charged with inert gas helium, helium will not
Battery is impacted.It is transferred to after sealing by manipulator crawl in the vacuum storehouse of detection process, battery side puts two sides clamping plate
Pressurization, according to battery core thickness control clamping plate gap, prevent that battery because bulging occurs for pressure difference, causes battery when vacuum storehouse from evacuating
Deformation, finally start to evacuate detection, judge whether battery leaks by detecting helium content in vacuum storehouse.It is filled with inside battery
Helium can be discharged in follow-up battery evacuation process, will not be impacted.
The detection method of the present invention is easy and effective, battery will not be destroyed, can carry out 100% full inspection, and can
Full-automatic detection, efficiency high are realized using automation equipment line.
Preferably, step（2）In, the vacuum degree control in the vacuum storehouse is in -50Mpa to -75Mpa after evacuation.Taking out
Space-time is, it is necessary to strictly control vacuum, if vacuum is too high, electrolyte can be also extracted, and be caused damage.
Preferably, step（3）In, it is filled with after helium makes in vacuum storehouse vacuum reach -20Mpa to -50Mpa, to electricity
Core is sealed.
Preferably, step（4）In, fixture is 1Mpa to 4Mpa to the pressure of battery core.Due under vacuum conditions, battery core
Helium is inside filled with, battery core can expand, it is therefore desirable to battery core is pressurizeed, battery deformation otherwise can be caused, influence performance.Folder
Have needs tightened up control to the pressure of battery core, and pressure is too high to clip broken battery core packaging bag, and pressure is too low, uncontrollable battery
Shape.
Preferably, step（4）After middle vacuum storehouse vacuumizes, vacuum degree control is in -75Mpa to -90Mpa.Above-mentioned true
Under reciprocal of duty cycle can effective detection battery sealing-performance, rupture cell expansion due to preventing pressure difference excessive.
It is compared with the prior art, the beneficial effects of the invention are as follows：The soft package lithium battery method for conducting leak test of the present invention is not
Battery can be damaged, 100% full inspection can be realized, and detection accuracy is high, cost is relatively low.
Embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
A kind of method for conducting leak test of soft package lithium battery, comprises the following steps：
（1）Battery liquid-filling：Electrolyte is irrigated into battery battery core.
（2）Evacuate：Battery is vacuumized in vacuum storehouse after fluid injection.After evacuation the vacuum degree control in the vacuum storehouse-
65Mpa。
（3）Note helium：The helium injection gas into vacuum storehouse, makes to be filled with helium in battery battery core, make in vacuum storehouse vacuum reach-
After 35Mpa, battery core is sealed.
（4）Evacuate helium inspection:By in battery transfer to another vacuum storehouse, and the battery core for clamping with fixture battery is pressurizeed,
Fixture is 2.5Mpa to the pressure of battery core.Then start to vacuumize, vacuum degree control helium in -80Mpa, detection vacuum storehouse contains
Amount.
Embodiment 2
A kind of method for conducting leak test of soft package lithium battery, comprises the following steps：
（1）Battery liquid-filling：Electrolyte is irrigated into battery battery core.
（2）Evacuate：Battery is vacuumized in vacuum storehouse after fluid injection.After evacuation the vacuum degree control in the vacuum storehouse-
50Mpa。
（3）Note helium：The helium injection gas into vacuum storehouse, makes to be filled with helium in battery battery core, make in vacuum storehouse vacuum reach-
After 20Mpa, battery core is sealed.
（4）Evacuate helium inspection:By in battery transfer to another vacuum storehouse, and the battery core for clamping with fixture battery is pressurizeed,
Fixture is 1Mpa to the pressure of battery core.Then start to vacuumize, vacuum degree control helium in -75Mpa, detection vacuum storehouse contains
Amount.
Embodiment 3
A kind of method for conducting leak test of soft package lithium battery, comprises the following steps：
（1）Battery liquid-filling：Electrolyte is irrigated into battery battery core.
（2）Evacuate：Battery is vacuumized in vacuum storehouse after fluid injection.After evacuation the vacuum degree control in the vacuum storehouse-
75Mpa。
（3）Note helium：The helium injection gas into vacuum storehouse, makes to be filled with helium in battery battery core, make in vacuum storehouse vacuum reach-
After 50Mpa, battery core is sealed.
（4）Evacuate helium inspection:By in battery transfer to another vacuum storehouse, and the battery core for clamping with fixture battery is pressurizeed,
Fixture is 4Mpa to the pressure of battery core.Then start to vacuumize, vacuum degree control is in -75Mpa to -90Mpa, detection vacuum storehouse
Helium content.
Raw materials used in the present invention, equipment, it is the conventional raw material, equipment of this area unless otherwise noted；In the present invention
Method therefor, it is the conventional method of this area unless otherwise noted.
It is described above, only it is presently preferred embodiments of the present invention, not the present invention is imposed any restrictions, it is every according to the present invention
Any simple modification, change and the equivalent transformation that technical spirit is made to above example, still fall within the technology of the present invention side
The protection domain of case.
Claims (5)
- A kind of 1. method for conducting leak test of soft package lithium battery, it is characterised in that：Comprise the following steps：（1）Battery liquid-filling：Electrolyte is irrigated into battery battery core；（2）Evacuate：Battery is vacuumized in vacuum storehouse after fluid injection；（3）Note helium：The helium injection gas into vacuum storehouse, make to be filled with helium in battery battery core, then battery core is sealed；（4）Evacuate helium inspection:By in battery transfer to another vacuum storehouse, and the battery core for clamping with fixture battery is pressurizeed, then Start to vacuumize, helium content in detection vacuum storehouse.
- A kind of 2. method for conducting leak test of soft package lithium battery as claimed in claim 1, it is characterised in that step（2）In, take out The vacuum degree control in the vacuum storehouse is in -50Mpa to -75Mpa after sky.
- A kind of 3. method for conducting leak test of soft package lithium battery as claimed in claim 1 or 2, it is characterised in that step（3） In, it is filled with after helium makes in vacuum storehouse vacuum reach -20Mpa to -50Mpa, battery core is sealed.
- A kind of 4. method for conducting leak test of soft package lithium battery as claimed in claim 1, it is characterised in that step（4）In, folder It is 1Mpa to 4Mpa to have to the pressure of battery core.
- A kind of 5. method for conducting leak test of soft package lithium battery as described in claim 1 or 4, it is characterised in that step（4）In After vacuum storehouse vacuumizes, vacuum degree control is in -75Mpa to -90Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610564127.5A CN107631844A (en) | 2016-07-18 | 2016-07-18 | A kind of method for conducting leak test of soft package lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610564127.5A CN107631844A (en) | 2016-07-18 | 2016-07-18 | A kind of method for conducting leak test of soft package lithium battery |
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| CN107631844A true CN107631844A (en) | 2018-01-26 |
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| CN201610564127.5A Pending CN107631844A (en) | 2016-07-18 | 2016-07-18 | A kind of method for conducting leak test of soft package lithium battery |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414156A (en) * | 2018-02-11 | 2018-08-17 | 安徽问天量子科技股份有限公司 | Sealing leak detection system based on avalanche photodide and its operating method |
| CN108692888A (en) * | 2018-06-05 | 2018-10-23 | 广舜检测技术（上海）有限公司 | A kind of method for conducting leak test of battery liquid-filling mouth enclosuring structure |
| CN109212132A (en) * | 2018-08-22 | 2019-01-15 | 湖南立方新能源科技有限责任公司 | A kind of soft-package battery encapsulation failure detection method |
| CN110057506A (en) * | 2019-04-30 | 2019-07-26 | 蜂巢能源科技有限公司 | Test the method for battery sealing-performance and the method for test battery quality |
| CN110608860A (en) * | 2019-09-05 | 2019-12-24 | 无锡格林司通科技有限公司 | Method for detecting air tightness of soft package battery |
| CN111413037A (en) * | 2020-04-28 | 2020-07-14 | 博众精工科技股份有限公司 | Sealing performance detection device and sealing performance detection method |
| CN111504561A (en) * | 2020-03-26 | 2020-08-07 | 合肥国轩高科动力能源有限公司 | Method for detecting air tightness of lithium ion battery |
| WO2021057781A1 (en) * | 2019-09-23 | 2021-04-01 | 湖南弘毅科技有限公司 | Soft pack lithium battery and airtightness testing method therefor |
| CN113092268A (en) * | 2021-04-01 | 2021-07-09 | 合肥国轩高科动力能源有限公司 | Soft package battery cell voltage withstand test method |
| US12034171B2 (en) | 2020-11-09 | 2024-07-09 | Medtronic, Inc. | Energy storage device assemblies |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414156A (en) * | 2018-02-11 | 2018-08-17 | 安徽问天量子科技股份有限公司 | Sealing leak detection system based on avalanche photodide and its operating method |
| CN108692888A (en) * | 2018-06-05 | 2018-10-23 | 广舜检测技术（上海）有限公司 | A kind of method for conducting leak test of battery liquid-filling mouth enclosuring structure |
| CN109212132A (en) * | 2018-08-22 | 2019-01-15 | 湖南立方新能源科技有限责任公司 | A kind of soft-package battery encapsulation failure detection method |
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| WO2021057781A1 (en) * | 2019-09-23 | 2021-04-01 | 湖南弘毅科技有限公司 | Soft pack lithium battery and airtightness testing method therefor |
| CN111504561A (en) * | 2020-03-26 | 2020-08-07 | 合肥国轩高科动力能源有限公司 | Method for detecting air tightness of lithium ion battery |
| CN111413037A (en) * | 2020-04-28 | 2020-07-14 | 博众精工科技股份有限公司 | Sealing performance detection device and sealing performance detection method |
| CN111413037B (en) * | 2020-04-28 | 2022-09-02 | 博众精工科技股份有限公司 | Sealing performance detection device and sealing performance detection method |
| US12034171B2 (en) | 2020-11-09 | 2024-07-09 | Medtronic, Inc. | Energy storage device assemblies |
| CN113092268A (en) * | 2021-04-01 | 2021-07-09 | 合肥国轩高科动力能源有限公司 | Soft package battery cell voltage withstand test method |
| CN113092268B (en) * | 2021-04-01 | 2022-11-04 | 合肥国轩高科动力能源有限公司 | Soft package battery cell voltage withstand test method |
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Application publication date: 20180126 |
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