CN106556496A - Battery negative pressure air-tightness detection method - Google Patents
Battery negative pressure air-tightness detection method Download PDFInfo
- Publication number
- CN106556496A CN106556496A CN201610881910.4A CN201610881910A CN106556496A CN 106556496 A CN106556496 A CN 106556496A CN 201610881910 A CN201610881910 A CN 201610881910A CN 106556496 A CN106556496 A CN 106556496A
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- CN
- China
- Prior art keywords
- battery
- negative pressure
- pressure air
- detection method
- tightness detection
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of battery negative pressure air-tightness detection method, comprises the following steps：S1, battery is toasted；S2, by baking after the battery stand at normal temperatures so as to be cooled to 45 55 DEG C；S3, connection negative pressure air-leakage detector, carry out negative pressure air-leakage test to the battery.The battery negative pressure air-tightness detection method of the present invention, before negative pressure air-leakage test is carried out, toasts to battery so as to certain temperature, can reduce the follow-up negative pressure air-leakage test time, improves efficiency.
Description
Technical field
The present invention relates to battery detecting technical field, more particularly to a kind of battery negative pressure air-tightness detection method.
Background technology
At present, it is required for carrying out which airtight detection of negative pressure after battery completes, to detect the whether gas leakage of internal battery core.
Existing is all to carry out at normal temperatures to battery negative pressure air-leakage test, long the time required to reading inside battery gas pressure change,
Detection efficiency is low.
The content of the invention
The technical problem to be solved in the present invention is, there is provided one kind carries efficient battery negative pressure air-tightness detection method.
The technical solution adopted for the present invention to solve the technical problems is：A kind of battery negative pressure air-leakage test side is provided
Method, comprises the following steps：
S1, battery is toasted；
S2, by baking after the battery stand at normal temperatures so as to be cooled to 45-55 DEG C；
S3, connection negative pressure air-leakage detector, carry out negative pressure air-leakage test to the battery.
Preferably, in step S1, battery is toasted at 85-110 DEG C.
Preferably, in step S2, the battery stands 20-60 minutes at normal temperatures.
Preferably, step S3 includes：
S3.1, evacuation is carried out to the inside battery；
S3.2, pressurize；
S3.3, the gas pressure numerical value for reading the inside battery.
Preferably, in step S3.1, it is the 10-30 seconds to the time of the inside battery evacuation.
Preferably, in step S3.2, the dwell time is the 20-40 seconds.
Beneficial effects of the present invention：Before negative pressure air-leakage test is carried out, battery is toasted so as to certain
Temperature, can reduce the follow-up negative pressure air-leakage test time, improve efficiency.
Description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the flow chart of the battery negative pressure air-tightness detection method of one embodiment of the invention.
Specific embodiment
In order to be more clearly understood to the technical characteristic of the present invention, purpose and effect, now compare accompanying drawing and describe in detail
The specific embodiment of the present invention.
As shown in figure 1, the battery negative pressure air-tightness detection method of one embodiment of the invention, at least comprises the following steps：
S1, battery is toasted.
S2, the battery after baking is stood at normal temperatures so as to be cooled to 45-55 DEG C.
S3, connection negative pressure air-leakage detector, carry out negative pressure air-leakage test to battery.
In step S1, battery is toasted at 85-110 DEG C；The baking procedure can remove the moisture of battery core in battery,
And battery can be heated up, be carried out at a temperature of higher than room temperature beneficial to subsequent step.
Baking can be carried out in an oven, and baking time is not limited, and be set according to practical situation.
In step S2, the battery after baking stands 20-60 minutes at normal temperatures, to be cooled to 45-55 DEG C (50 ± 5 DEG C),
Temperature after the cooling is mainly defined by battery core internal temperature.At this temperature, can reach negative pressure air-leakage test efficiency with it is steady
Qualitatively balance.
In step S3, battery carries out negative pressure to battery by negative pressure air-leakage detector airtight in the case of 45-55 DEG C
Property detection, detection operation can be realized using prior art.The detection parameter of negative pressure air-leakage detector (includes time, vacuum
Etc.) set according to the battery core of different model.
Specifically, step S3 may include：
S3.1, evacuation is carried out to inside battery so that battery core internal pressure reaches certain pressure value, for example,-
95kPa or more.
Evacuation process is carried out to inside battery, the gas being primarily directed in the both positive and negative polarity pole piece and barrier film space of battery core
Body carries out evacuation, according to The Ideal-Gas Equation：PV=nRT (P gas pressure intensities, V gas volumes, the amount of n gaseous matters, R
Gas constant, T aerothermodynami temperature), it is known that, the temperature (T) of gas is improved, internal gas is more beneficial for and is extracted, so as to
The pumpdown time can be reduced.Therefore, before the step, by toasting to battery and cooling down so as to which internal air temperature is 45-
55 DEG C, more preferably it is extracted compared with the gas temperature of room temperature, reduces the time of evacuation, improves efficiency.
In step S3.1, it can be the 10-30 seconds to the time of inside battery evacuation.
S3.2, pressurize.
After the completion of evacuation, after stopping evacuation, pressurize is carried out；Dwell time is the 20-40 seconds.
The pressurize is processed, and the both positive and negative polarity pole piece and the gas inside barrier film for being mainly used for battery core continues release, Zhi Dao electricity
Core inner pressure does not continue to change or change unobvious；Pressure changing can be read on negative pressure air-leakage detector.
According to gas motion speed formula c=1.6 [(R × T) ÷ μ] ^ (0.5), wherein R is gas constant, and T is definitely warm
Degree, μ is molecular weight.Understand, improve temperature can effective lift gas movement velocity, so as to reduce the dwell time.Therefore, the step
Before rapid, by toasting to battery and cooling down so as to which internal air temperature is 45-55 DEG C, compared with the gas of room temperature, gas motion
Speed is higher, and the required dwell time is short.
S3.3, the gas pressure numerical value for reading inside battery.
The step mainly reads the gas pressure change situation of inside battery, by gas pressure change situation detection electricity
Core inner whether gas leakage, to detect the negative pressure air-tightness of battery.
Due to, before step S3, toasting to battery, after battery core internal temperature raises (45-55 DEG C), correspondence battery core
Internal gas density declines, and can produce convection current with the gas in air, with atmosphere exchange rate in air inside increase battery core, increase
Plus-pressure pace of change, so as to obtain inside battery gas pressure change situation the time required to it is short, so as to improve the negative of battery
Pressure air-tightness detection efficiency.
Embodiments of the invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (6)
1. a kind of battery negative pressure air-tightness detection method, it is characterised in that comprise the following steps：
S1, battery is toasted；
S2, by baking after the battery stand at normal temperatures so as to be cooled to 45-55 DEG C；
S3, connection negative pressure air-leakage detector, carry out negative pressure air-leakage test to the battery.
2. battery negative pressure air-tightness detection method according to claim 1, it is characterised in that in step S1, battery is existed
Toasted at 85-110 DEG C.
3. battery negative pressure air-tightness detection method according to claim 1, it is characterised in that in step S2, the battery
Stand 20-60 minutes at normal temperatures.
4. battery negative pressure air-tightness detection method according to claim 1, it is characterised in that step S3 includes：
S3.1, evacuation is carried out to the inside battery；
S3.2, pressurize；
S3.3, the gas pressure numerical value for reading the inside battery.
5. battery negative pressure air-tightness detection method according to claim 4, it is characterised in that in step S3.1, to described
The time of inside battery evacuation is the 10-30 seconds.
6. battery negative pressure air-tightness detection method according to claim 4, it is characterised in that in step S3.2, during pressurize
Between be the 20-40 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610881910.4A CN106556496A (en) | 2016-10-09 | 2016-10-09 | Battery negative pressure air-tightness detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610881910.4A CN106556496A (en) | 2016-10-09 | 2016-10-09 | Battery negative pressure air-tightness detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106556496A true CN106556496A (en) | 2017-04-05 |
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ID=58418459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610881910.4A Pending CN106556496A (en) | 2016-10-09 | 2016-10-09 | Battery negative pressure air-tightness detection method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010016278A1 (en) * | 2000-02-22 | 2001-08-23 | Matsushita Electric Industrial Co.,Ltd. | Battery sealing inspection method |
| CN101034032A (en) * | 2007-04-27 | 2007-09-12 | 天津力神电池股份有限公司 | Accurate detecting method for cavity leakage of lithium-ion battery and device thereof |
| CN101227014A (en) * | 2007-01-19 | 2008-07-23 | 深圳市比克电池有限公司 | Method for detecting lithium ion battery airtightness |
| 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 |
-
2016
- 2016-10-09 CN CN201610881910.4A patent/CN106556496A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010016278A1 (en) * | 2000-02-22 | 2001-08-23 | Matsushita Electric Industrial Co.,Ltd. | Battery sealing inspection method |
| CN101227014A (en) * | 2007-01-19 | 2008-07-23 | 深圳市比克电池有限公司 | Method for detecting lithium ion battery airtightness |
| CN101227014B (en) * | 2007-01-19 | 2011-02-02 | 深圳市比克电池有限公司 | Method for detecting lithium ion battery airtightness |
| CN101034032A (en) * | 2007-04-27 | 2007-09-12 | 天津力神电池股份有限公司 | Accurate detecting method for cavity leakage of lithium-ion battery and device thereof |
| 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 |
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Application publication date: 20170405 |