CN102914409A - Method for testing air tightness quality of flexibly packaged lithium ion battery - Google Patents
Method for testing air tightness quality of flexibly packaged lithium ion battery Download PDFInfo
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- CN102914409A CN102914409A CN2012102878204A CN201210287820A CN102914409A CN 102914409 A CN102914409 A CN 102914409A CN 2012102878204 A CN2012102878204 A CN 2012102878204A CN 201210287820 A CN201210287820 A CN 201210287820A CN 102914409 A CN102914409 A CN 102914409A
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Abstract
The invention relates to a method for testing the air tightness quality of a flexibly packaged lithium ion battery. The method for testing comprises the following steps of: (1) weighing and recording the initial mass of the tested sample; (2) putting the measured sample of the step (1) in a constant temperature and pressure oven to be subjected to heat treatment; and (3), weighing the mass of the tested sample which is subjected to the heat treatment in the step (2), and comparing with the initial mass of the step (1). The method can test the air tightness quality of the flexibly packaged lithium ion battery in a final state, and moreover, the impacts of gases and liquids to aluminium plastic film edge bandings can be simulated through heating and vacuumizing modes, so that an inspection result is scientific and reliable.
Description
Technical field
The present invention relates to a kind of check of sealing, relate in particular to a kind of check of battery sealing-performance.
Background technology
Aluminum plastic film is widely used in battery industry as the external packing of lithium ion battery.Impermeability quality after the aluminum plastic film heat-sealing is related to battery and whether can stands long-term use, if sealing is not good then can produce the risk of bulging even leakage, makes battery performance sharply deteriorated even affect personal safety.At present, the mode of general survey cell sealing quality is that two aluminum plastic films are enclosed in together by heating, takes puller system to peel off from 180 ° of T words between two aluminum plastic films after cutting certain width, judges the quality of quality by its peeling force size.The numerical value that this mode records is based on total peeling force of certain certain width finalization area, all is good seals and can't represent each tiny area, and specimen is not the battery of end-state.Electrolytic solution and aqueous vapor belong to liquids and gases, and any small slit all might be passed through, and particularly one place's edge sealing is arranged is with aluminum plastic film and lug heat-sealing to flexible packing lithium ion battery,
This shows, the impermeability quality restriction method of above-mentioned existing flexible packing lithium ion battery obviously still has inconvenience and defective, and demands urgently further being improved in the use.The problem that exists for the impermeability quality restriction method that solves flexible packing lithium ion battery, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but have no for a long time applicable design is finished by development always, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious wish of relevant dealer solves.
Because the defective that the impermeability quality restriction method of above-mentioned existing flexible packing lithium ion battery exists, the inventor is based on being engaged in for many years abundant practical experience and professional knowledge of this type of product design manufacturing, and the utilization of cooperation scientific principle, positive research and innovation in addition, to founding a kind of impermeability quality restriction method of novel flexible package lithium ion battery, make it have more practicality.Through constantly research, design, and after repeatedly studying sample and improvement, finally create the present invention who has practical value.
Summary of the invention
Fundamental purpose of the present invention is, overcome the defective of the impermeability quality restriction method existence of existing flexible packing lithium ion battery, and provide a kind of impermeability quality restriction method of novel flexible package lithium ion battery, technical matters to be solved is to make more science, reliable of its measurement result, thereby more be suitable for practicality, and have the value on the industry.
The object of the invention to solve the technical problems realizes by the following technical solutions.The impermeability quality restriction method of a kind of flexible packing lithium ion battery that proposes according to the present invention, this method of inspection comprises the steps:
(1) takes by weighing and records the initial mass of specimen;
(2) specimen in the step (1) is placed on heat treated in the baking oven of constant temperature and pressure;
(3) take by weighing specimen quality through step (2) heat treated, and with the initial mass contrast of step (1).
The temperature of constant temperature is 60 ℃ ~ 150 ℃ in the abovementioned steps (2).
The pressure of constant voltage is 0MPa ~ 0.1 MPa in the abovementioned steps (2).
By technique scheme, the impermeability quality restriction method of flexible packing lithium ion battery of the present invention has following advantages at least:
Can the testing flexible lithium ion battery sealing quality under final form, and by the impact to the aluminum plastic film edge sealing of heating and the mode analog gas that vacuumizes, liquid, science is reliable more to make result of determination.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, below is described in detail as follows with preferred embodiment of the present invention.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, its embodiment of detection method, feature and effect thereof to foundation the present invention proposes are described in detail as follows.
Embodiment 1
Aluminum plastic film rushes the hole by the standard cell dimensional requirement, generally comprises one or two symmetrical holes that rush that are used for the packed battery core, also includes simultaneously air chamber.With reel or lamination and the battery of soldering polar ear pack in the aluminum plastic film in punching hole, and with aluminum plastic film to amounting to button in order to encase battery.The closedtop limit of lug position and one of them banding seal first, reserve remaining place's banding open-ended.Inject the organic solvent of a certain amount of electrolytic solution or similar quality, with unsealed banding heat-sealing.Then final banding is finished in the sealing of will bleeding, and cuts out the airbag part of removing aluminum plastic film, finishes the making of specimen, and with the precise electronic balance record of weighing.Get one with heating, constant temperature, vacuumize the baking oven of function, 60 ℃ of Temperature Settings, until temperature reach target temperature and constant after, sample is positioned in the baking oven, setting is evacuated to atmospheric pressure value 0.1Mpa, battery is placed 30 minutes in baking oven after, and the venting vacuum, take out battery, and again weigh with the precise electronic balance.Evaluate the quality of flexible-packed battery sealing quality by weight difference before and after the test of battery.
Embodiment 2
Aluminum plastic film rushes the hole by the standard cell dimensional requirement, generally comprises one or two symmetrical holes that rush that are used for the packed battery core, also includes simultaneously air chamber.With reel or lamination and the battery of soldering polar ear pack in the aluminum plastic film in punching hole, and with aluminum plastic film to amounting to button in order to encase battery.The closedtop limit of lug position and one of them banding seal first, reserve remaining place's banding open-ended.Inject the organic solvent of a certain amount of electrolytic solution or similar quality, with unsealed banding heat-sealing.Then final banding is finished in the sealing of will bleeding, and cuts out the airbag part of removing aluminum plastic film, finishes the making of specimen, and with the precise electronic balance record of weighing.Get one with heating, constant temperature, vacuumize the baking oven of function, 150 ℃ of Temperature Settings, until temperature reach target temperature and constant after, sample is positioned in the baking oven, setting is evacuated to atmospheric pressure value 0Mpa, battery is placed 10 minutes in baking oven after, and the venting vacuum, take out battery, and again weigh with the precise electronic balance.Evaluate the quality of flexible-packed battery sealing quality by weight difference before and after the test of battery.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (3)
1. the impermeability quality restriction method of a flexible packing lithium ion battery, it is characterized in that: this method of inspection comprises the steps:
(1) takes by weighing and records the initial mass of specimen;
(2) specimen in the step (1) is placed on heat treated in the baking oven of constant temperature and pressure;
(3) take by weighing specimen quality through step (2) heat treated, and with the initial mass contrast of step (1).
2. the impermeability quality restriction method of a kind of flexible packing lithium ion battery according to claim 1 is characterized in that: the temperature of constant temperature is 60 ℃ ~ 150 ℃ in the described step (2).
3. the impermeability quality restriction method of a kind of flexible packing lithium ion battery according to claim 1 and 2 is characterized in that: the pressure of constant voltage is 0MPa ~ 0.1 MPa in the described step (2).
Priority Applications (1)
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| CN2012102878204A CN102914409A (en) | 2012-08-14 | 2012-08-14 | Method for testing air tightness quality of flexibly packaged lithium ion battery |
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| CN2012102878204A CN102914409A (en) | 2012-08-14 | 2012-08-14 | Method for testing air tightness quality of flexibly packaged lithium ion battery |
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Cited By (11)
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| CN104568324A (en) * | 2014-12-20 | 2015-04-29 | 山东神工海特电子科技有限公司 | Detecting method for flexible package battery packaging effect |
| CN104729798A (en) * | 2015-04-02 | 2015-06-24 | 天津力神电池股份有限公司 | Battery sealing performance testing method |
| CN105092170A (en) * | 2014-05-08 | 2015-11-25 | 有量科技股份有限公司 | Sealing test method for electricity storage device |
| 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 |
| 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 |
| CN107664559A (en) * | 2017-08-01 | 2018-02-06 | 南通江海储能技术有限公司 | A kind of ultracapacitor leak hunting method |
| CN108123176A (en) * | 2016-11-27 | 2018-06-05 | 深圳格林德能源有限公司 | A kind of method for verifying polymer Li-ion battery package quality |
| 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 |
| CN109360933A (en) * | 2018-11-14 | 2019-02-19 | 桑顿新能源科技有限公司 | A kind of soft bag lithium ionic cell and preparation method thereof, application |
| CN110108412A (en) * | 2019-05-08 | 2019-08-09 | 天津市捷威动力工业有限公司 | A kind of battery pack air-tightness detection device and method |
| CN111579158A (en) * | 2020-05-19 | 2020-08-25 | 苏州清陶新能源科技有限公司 | Method for testing air tightness of soft package battery |
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Cited By (13)
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| CN105092170B (en) * | 2014-05-08 | 2019-03-15 | 有量科技股份有限公司 | The hermetization testing method of electric storage device |
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| CN104568324A (en) * | 2014-12-20 | 2015-04-29 | 山东神工海特电子科技有限公司 | Detecting method for flexible package battery packaging effect |
| CN104729798A (en) * | 2015-04-02 | 2015-06-24 | 天津力神电池股份有限公司 | Battery sealing performance testing 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 |
| 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 |
| CN108123176A (en) * | 2016-11-27 | 2018-06-05 | 深圳格林德能源有限公司 | A kind of method for verifying polymer Li-ion battery package quality |
| CN107664559A (en) * | 2017-08-01 | 2018-02-06 | 南通江海储能技术有限公司 | A kind of ultracapacitor leak hunting method |
| 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 |
| CN109360933A (en) * | 2018-11-14 | 2019-02-19 | 桑顿新能源科技有限公司 | A kind of soft bag lithium ionic cell and preparation method thereof, application |
| CN110108412A (en) * | 2019-05-08 | 2019-08-09 | 天津市捷威动力工业有限公司 | A kind of battery pack air-tightness detection device and method |
| CN111579158A (en) * | 2020-05-19 | 2020-08-25 | 苏州清陶新能源科技有限公司 | Method for testing air tightness of soft package battery |
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Application publication date: 20130206 |