CN104729798A - Battery sealing performance testing method - Google Patents

Battery sealing performance testing method Download PDF

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Publication number
CN104729798A
CN104729798A CN201510152175.9A CN201510152175A CN104729798A CN 104729798 A CN104729798 A CN 104729798A CN 201510152175 A CN201510152175 A CN 201510152175A CN 104729798 A CN104729798 A CN 104729798A
Authority
CN
China
Prior art keywords
battery
negative pressure
vacuum
box
sealing
Prior art date
Application number
CN201510152175.9A
Other languages
Chinese (zh)
Inventor
张火成
张娜
李杨
王永武
郭玉彬
Original Assignee
天津力神电池股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 天津力神电池股份有限公司 filed Critical 天津力神电池股份有限公司
Priority to CN201510152175.9A priority Critical patent/CN104729798A/en
Publication of CN104729798A publication Critical patent/CN104729798A/en

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Abstract

The invention relates to a battery sealing performance testing method. The method comprises the steps of placing a sealed battery into a battery containing box inversely, wherein liquid absorption paper is placed on the bottom of the containing box; placing the battery containing box into a cavity of a vacuum box together with the battery and starting a vacuum pump for vacummizing; stopping vacuumizing when the vacuum degree in the cavity of the vacuum box reaches a preset value, and conducting negative pressure maintenance; opening the vacuum box after negative pressure maintenance is conducted for a period of time, and judging whether leakage occurs with the weight loss method and/or by detecting the state of the liquid absorption paper. The method can effectively detect batteries with poor sealing performance or leakage, operation is easy and stable, working efficiency is improved greatly, and requirements for large-scale industrial production are met.

Description

A kind of battery seal method for conducting leak test
Technical field
The invention belongs to lithium-ion-power cell detection technique field, be specifically related to a kind of lithium-ion-power cell sealing leak detection method.
Background technology
Along with the development of modern society and the enhancing of people's environmental consciousness, increasing equipment choice is using chargeable secondary cell as power supply, as mobile phone, notebook computer, electric tool and electric automobile etc., this is that the application & development of chargeable secondary cell provides wide space.
Electrolytic solution is the important ingredient of battery, carries the effect being transmitted ion by inside battery between positive and negative electrode, and it has important impact to the capacity of battery, operating temperature range, cycle performance and security performance etc.
At present, the sealing mode of square aluminum hull electrokinetic cell mainly contains pounds ball sealing and Laser Welding (LBW) P I N two kinds, but all there is respective shortcoming in these two kinds of sealing modes, as pounded ball sealing mouth due to the sealing poor fit of blocking and battery cover board with pound ball pressure and cause cell sealing bad not, Laser Welding (LBW) PI N easily causes failure welding by battery surface impurity.How can efficiently, after batch detection sealing the sealing property of battery becomes the problem that numerous producer is devoted to solve.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above and a kind of battery seal method for conducting leak test that can detect the rear battery hermetization of sealing fast, is in a large number provided.
For achieving the above object, the present invention is by the following technical solutions:
A kind of battery seal method for conducting leak test, first the battery after sealing is inverted in battery accommodation box, waterleaf paper is placed with bottom described accommodation box, then described battery accommodation box and battery are together put into vacuum tank cavity, start vacuum pump to vacuumize, stop vacuumizing after the vacuum tightness in described vacuum tank cavity reaches setting value, carry out guarantor's Negative pressure, after guarantor's negative pressure a period of time, open vacuum tank, judge whether battery exists sealing leakage by weight-loss method and/or detection waterleaf paper state.
Described guarantor's negative pressure time of carrying out protecting Negative pressure is 10-30 minute.
The setting value of described vacuum tightness is-0.085MPa to-0.095MPa.
Described waterleaf paper is cotton pulp, wood pulp paper or variable color paper.
The grid separated by multiple battery is provided with in described battery accommodation box.
The present invention vacuumizes reduced pressure treatment by being inverted in vacuum tank the battery after sealing, electrolytic solution can be made from the micropore of bad battery, finedraw place flows out, bottom battery accommodation box, lay waterleaf paper simultaneously, adsorb after electrolytic solution spills, avoid after opening vacuum chamber, again the electrolytic solution spilt is sucked when battery becomes atmospheric pressure state from negative pressure state, finally by detecting waterleaf paper and/or weighing the battery that battery weightlessness determines poor sealing, efficiently can check out the battery of poor sealing or leakage, and process stabilization simple to operate, work efficiency improves greatly, the needs being applicable to large-scale industrial production are of great practical significance.
Accompanying drawing explanation
Figure 1 shows that the detection schematic diagram of the battery seal sealing propertytest that the embodiment of the present invention provides;
Figure 2 shows that the schematic diagram of the battery of laser seal;
Figure 3 shows that the schematic diagram of the sealing side of the battery pounding ball sealing mouth.
Embodiment
Below, in conjunction with example, substantive distinguishing features of the present invention and advantage are further described, but the present invention is not limited to listed embodiment.
Refer to Fig. 1, a kind of battery seal method for conducting leak test, first the battery 4 after sealing is inverted in battery accommodation box 1, waterleaf paper (not shown) is placed with bottom described accommodation box, then described battery accommodation box 1 is together put into vacuum tank cavity with battery, start vacuum pump to vacuumize, stop vacuumizing after the vacuum tightness in described vacuum tank cavity reaches setting value, carry out guarantor's Negative pressure, after guarantor's negative pressure a period of time, open vacuum tank, judge whether battery exists sealing leakage by weight-loss method and/or detection waterleaf paper state.
It should be noted that, to be describedly inverted in battery accommodation box by battery after sealing, under the sealing end referring to battery or sealing side direction, and be vertically placed on described waterleaf paper, described waterleaf paper is pointed in sealing end or sealing side.Like this, when battery has the phenomenon of leakage to occur, the leakage at Self-enclosing place can flow on described waterleaf paper and be absorbed by waterleaf paper, like this, the convenient state detecting waterleaf paper by range estimation judges battery whether leakage, maybe when estimating bad judgements, also can by weighing this by the weight of battery of taking out in vacuum tank, by the comparison of front and back weight, judge that battery is whether weightless to realize judging battery whether leakage or seal bad.
In the embodiment of the present invention, battery for detecting can be the battery adopting laser seal, the battery 5 with laser seal 6 as shown in Figure 2, also can be to adopt the mode of pounding ball to carry out the battery sealed, as shown in Figure 3, the sealing side of this battery has and pounds ball sealing mouth 7.
Preferably, in the embodiment of the present invention, described in carry out protecting guarantor's negative pressure time of Negative pressure be 10-30 minute.
Preferably, in the embodiment of the present invention, the setting value of described vacuum tightness is-0.085MPa to-0.095MPa.
In specific implementation, in the embodiment of the present invention, described waterleaf paper is cotton pulp, wood pulp paper or variable color paper.
In specific implementation, in the embodiment of the present invention, in described battery accommodation box 1, be provided with the grid 2 separated by multiple battery 4.Like this, form multiple cell partition district 3 in battery accommodation box 1, detected battery is positioned in this cell partition district, and described in each, the bottom in cell partition district is placed with described waterleaf paper.Like this, can be implemented in and place multiple battery in a battery accommodation box simultaneously and detect, be about to the battery accommodation box accommodating multiple battery and the battery be placed in one, put into vacuum tank and carry out vacuumizing process, the detection of batch can be realized like this, substantially increase the efficiency of detection.
From above technical scheme, can find out, the present invention vacuumizes reduced pressure treatment by being inverted in vacuum tank the battery after sealing, electrolytic solution can be made to flow out from the micropore of bad battery or finedraw, bottom battery accommodation box, lay waterleaf paper simultaneously, leakage absorption is carried out after electrolytic solution spills, after avoiding the vacuum chamber opening vacuum chamber, again the electrolytic solution spilt is sucked when battery becomes atmospheric pressure state from negative pressure state, finally by detecting waterleaf paper and/or weighing the battery that battery weightlessness determines poor sealing, efficiently can check out the battery of poor sealing or leakage, and method provided by the invention process stabilization simple to operate, work efficiency improves greatly, be applicable to the needs of large-scale industrial production, be of great practical significance.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (5)

1. a battery seal method for conducting leak test, it is characterized in that, first the battery after sealing is inverted in battery accommodation box, waterleaf paper is placed with bottom described accommodation box, then described battery accommodation box and battery are together put into vacuum tank cavity, start vacuum pump to vacuumize, stop vacuumizing after the vacuum tightness in described vacuum tank cavity reaches setting value, carry out guarantor's Negative pressure, after guarantor's negative pressure a period of time, open vacuum tank, judge whether battery exists sealing leakage by weight-loss method and/or detection waterleaf paper state.
2. battery seal method for conducting leak test according to claim 1, is characterized in that, described in carry out protecting Negative pressure guarantor's negative pressure time be 10-30 minute.
3. battery seal method for conducting leak test according to claim 2, is characterized in that, the setting value of described vacuum tightness is-0.085MPa to-0.095MPa.
4. battery seal method for conducting leak test according to claim 3, it is characterized in that, described waterleaf paper is cotton pulp, wood pulp paper or variable color paper.
5. battery seal method for conducting leak test according to any one of Claims 1 to 4, is characterized in that, is provided with the grid separated by multiple battery in described battery accommodation box.
CN201510152175.9A 2015-04-02 2015-04-02 Battery sealing performance testing method CN104729798A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510152175.9A CN104729798A (en) 2015-04-02 2015-04-02 Battery sealing performance testing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510152175.9A CN104729798A (en) 2015-04-02 2015-04-02 Battery sealing performance testing method

Publications (1)

Publication Number Publication Date
CN104729798A true CN104729798A (en) 2015-06-24

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105466641A (en) * 2015-10-15 2016-04-06 杭州伯坦科技工程有限公司 Battery leakage rapid detection device and detection method thereof
CN105572036A (en) * 2015-12-17 2016-05-11 新源动力股份有限公司 Method for testing sealing ability of fuel battery glue line
CN106733717A (en) * 2016-12-27 2017-05-31 浙江超威创元实业有限公司 A kind of method for detecting that soft package lithium battery is damaged
CN108241127A (en) * 2017-12-29 2018-07-03 江西省汇亿新能源有限公司 A kind of safety detecting method of lithium battery

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1130668A1 (en) * 2000-02-22 2001-09-05 Matsushita Electric Industrial Co., Ltd. Battery sealing inspection method
CN1350336A (en) * 2000-10-25 2002-05-22 Nec移动能源株式会社 Closed cell and method for manufacturing the same
JP2011179975A (en) * 2010-03-01 2011-09-15 Ts:Kk Device and method for inspecting leakage
CN202255772U (en) * 2011-10-11 2012-05-30 中华人民共和国常州出入境检验检疫局 Negative pressure heating tester for storage battery
CN102494856A (en) * 2011-11-14 2012-06-13 天津力神电池股份有限公司 Automatic detecting equipment of polymer lithium ion battery leaked liquid
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1130668A1 (en) * 2000-02-22 2001-09-05 Matsushita Electric Industrial Co., Ltd. Battery sealing inspection method
CN1350336A (en) * 2000-10-25 2002-05-22 Nec移动能源株式会社 Closed cell and method for manufacturing the same
JP2011179975A (en) * 2010-03-01 2011-09-15 Ts:Kk Device and method for inspecting leakage
CN202255772U (en) * 2011-10-11 2012-05-30 中华人民共和国常州出入境检验检疫局 Negative pressure heating tester for storage battery
CN102494856A (en) * 2011-11-14 2012-06-13 天津力神电池股份有限公司 Automatic detecting equipment of polymer lithium ion battery leaked liquid
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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105466641A (en) * 2015-10-15 2016-04-06 杭州伯坦科技工程有限公司 Battery leakage rapid detection device and detection method thereof
CN105572036A (en) * 2015-12-17 2016-05-11 新源动力股份有限公司 Method for testing sealing ability of fuel battery glue line
CN105572036B (en) * 2015-12-17 2018-06-19 新源动力股份有限公司 A kind of fuel cell tree lace sealability test method
CN106733717A (en) * 2016-12-27 2017-05-31 浙江超威创元实业有限公司 A kind of method for detecting that soft package lithium battery is damaged
CN106733717B (en) * 2016-12-27 2019-01-25 浙江超威创元实业有限公司 A method of detection soft package lithium battery is damaged
CN108241127A (en) * 2017-12-29 2018-07-03 江西省汇亿新能源有限公司 A kind of safety detecting method of lithium battery

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Application publication date: 20150624