CN109701909A - A method of screening rectangular lithium ion battery leakage - Google Patents
A method of screening rectangular lithium ion battery leakage Download PDFInfo
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- CN109701909A CN109701909A CN201811545652.8A CN201811545652A CN109701909A CN 109701909 A CN109701909 A CN 109701909A CN 201811545652 A CN201811545652 A CN 201811545652A CN 109701909 A CN109701909 A CN 109701909A
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- lithium ion
- ion battery
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Abstract
The invention discloses a kind of methods for screening rectangular lithium ion battery leakage, and rectangular lithium ion battery is placed in high humidity environment and is shelved a period of time, then by manually visualizing full inspection weld appearance, pick out the rectangular lithium ion battery of weld seam leakage.Screening technique provided by the invention is easy to operate, low in cost, and effect is obvious.
Description
Technical field
The present invention relates to battery manufacturing fields, and in particular to a method of screening rectangular lithium ion battery leakage.
Background technique
Rectangular lithium ion battery with aluminum shell production technology is generally to enter high temperature ageing process, the method for screening leakage after cleaning
Also traditional artificial visual full inspection appearance is mostly used.Under normal circumstances, leakage is bad at steel ball sealing liquid injection hole, aluminum hull and Aluminum cover
At the laser weld of interference fit, by manually visualizing full inspection, it is very easy to filter out leakage battery.But it is very subtle
Weld seam trachoma is then difficult full inspection by visual observation and filters out, especially the material or surface because of aluminum hull and Aluminum cover interference fit
There are impurity or dirty, or the interference fit factors such as defect or laser power deficiency, and seriously affect laser welding melting effect,
But just not by the select lithium ion battery of leak detecting device, can not be filtered out at all by manually visualizing full inspection weld seam.
There are the battery of weld seam trachoma leakage defect, outside moisture can be reacted with these electrolyte leaked out, and generation can accelerate trachoma
The HF acid that leakage pitting corrosion becomes larger, while inside battery is entered by liquid-leaking nozzle, lithium ion battery super thick, low appearance are eventually led to,
Even occur exploding.
Summary of the invention
The technical problem to be solved in the present invention is to overcome disadvantages described above, a kind of screening rectangular lithium ion battery leakage is provided
Method, principle is: as long as being exposed in high humidity environment a period of time, rectangular lithium ion battery with aluminum shell can be because by high humidity environment
Influence, and there is obviously weld seam trachoma.The battery of weld seam trachoma leakage defect is filtered out using high humidity environment.
Technical problem of the invention is achieved by the following technical programs.
The method of this rectangular lithium ion battery with aluminum shell leakage of screening: rectangular lithium ion battery with aluminum shell is placed on high humidity environment
In shelve a period of time, then the battery of leakage is picked out by artificial visual full inspection.
The temperature of the high humidity environment is preferably 35~45 DEG C.
The relative humidity of the high humidity environment is preferably 85~95RH%.
Described shelves a period of time preferably 2~5 days.
The beneficial effects of the present invention are: first, solve those batteries for there was only very subtle weld seam trachoma leakage traces,
In full inspection appearance, it is not easy to the problem of identifying, easily failing to judge；The second, solving those, there are potential weld seam trachoma leakage defects
Battery, at all can not be by manually visualizing the problem of full inspection weld seam filters out.Compared with traditional screening leakage method, it can make
The battery of those very subtle weld seam trachoma leakage traces, and there are the batteries of potential weld seam trachoma leakage defect, short
Obviously weld seam trachoma leakage trace is exposed in time, when making to manually visualize full inspection weld appearance, is very easy to identification
And it filters out.There is super thick, low appearance, even explosion equiprobability with great practice significance in end user location to battery is reduced.
Specific embodiment
Below in conjunction with specific embodiment, the invention will be further described.
The present invention relates to battery manufacturing fields, and in particular to a method of screen rectangular lithium ion battery with aluminum shell leakage.
A certain number of rectangular lithium ion battery with aluminum shell are placed in a period of time, embodiment envionmental humidity in 35~45 DEG C of environment
For 85~95RH%, reference examples envionmental humidity is 5~75RH%, and the leakage that Statistics Implementation example and reference examples are picked out respectively is not
Good number of batteries.
Embodiment 1
Take model 993448AR with the ring that battery 1000pcs is placed in 35~45 DEG C, relative humidity is 85~95RH% after batch cleaning
In border, successively in the 1st, 2,3,4,5,10,20,30 day full inspection battery appearance, picks out the bad battery number of weld seam leakage and be followed successively by
18pcs、1pcs、0、0、0、0、0、0。
Reference examples 1
Take model 993448AR with the ring that battery 1000pcs is placed in 35~45 DEG C, relative humidity is 5~75RH% after batch cleaning
In border, successively in the 1st, 2,3,4,5,10,20,30 day full inspection battery appearance, picks out the bad battery number of weld seam leakage and be followed successively by
0、0、1pcs、0、0、7pcs、0、1pcs。
Embodiment 2
Take model 883038AR with the ring that battery 1000pcs is placed in 35~45 DEG C, relative humidity is 85~95RH% after batch cleaning
In border, successively in the 1st, 2,3,4,5,10,20,30 day full inspection battery appearance, picks out the bad battery number of weld seam leakage and be followed successively by
23pcs、1pcs、1pcs、0、0、0、0、0。
Reference examples 2
Take model 883038AR with the ring that battery 1000pcs is placed in 35~45 DEG C, relative humidity is 5~75RH% after batch cleaning
In border, successively in the 1st, 2,3,4,5,10,20,30 day full inspection battery appearance, picks out the bad battery number of weld seam leakage and be followed successively by
0、1pcs、0、0、0、10pcs、0、0。
Embodiment 3
Take model 603450AR with the ring that battery 1000pcs is placed in 35~45 DEG C, relative humidity is 85~95RH% after batch cleaning
In border, successively in the 1st, 2,3,4,5,10,20,30 day full inspection battery appearance, picks out the bad battery number of weld seam leakage and be followed successively by
12pcs、0、0、0、0、0、0、0。
Reference examples 3
Take model 603450AR with the ring that battery 1000pcs is placed in 35~45 DEG C, relative humidity is 5~75RH% after batch cleaning
In border, successively in the 1st, 2,3,4,5,10,20,30 day full inspection battery appearance, picks out the bad battery number of weld seam leakage and be followed successively by
0、0、0、0、0、4pcs、0、0。
Embodiment 4
Take model 563855AR with the ring that battery 1000pcs is placed in 35~45 DEG C, relative humidity is 85~95RH% after batch cleaning
In border, successively in the 1st, 2,3,4,5,10,20,30 day full inspection battery appearance, picks out the bad battery number of weld seam leakage and be followed successively by
13pcs、2pcs、0、0、0、0、0、0。
Reference examples 4
Take model 563855AR with the ring that battery 1000pcs is placed in 35~45 DEG C, relative humidity is 5~75RH% after batch cleaning
In border, successively in the 1st, 2,3,4,5,10,20,30 day full inspection battery appearance, picks out the bad battery number of weld seam leakage and be followed successively by
0、0、0、0、1pcs、3pcs、0、0。
Embodiment 5
Take model 423450AR with the ring that battery 1000pcs is placed in 35~45 DEG C, relative humidity is 85~95RH% after batch cleaning
In border, successively in the 1st, 2,3,4,5,10,20,30 day full inspection battery appearance, picks out the bad battery number of weld seam leakage and be followed successively by
8pcs、0、0、0、0、0、0、0。
Reference examples 5
Take model 423450AR with the ring that battery 1000pcs is placed in 35~45 DEG C, relative humidity is 5~75RH% after batch cleaning
In border, successively in the 1st, 2,3,4,5,10,20,30 day full inspection battery appearance, picks out the bad battery number of weld seam leakage and be followed successively by
0、0、0、0、0、2pcs、0、0。
It can be seen that the method phase with the screening battery weld seam leakage of traditional high temperature ageing process from the statistical data of table 1
Than after the method for the present invention, each bad number of batteries of model leakage that full inspection appearance process is sifted out is dramatically increased, and main
Concentration occurs on day 1, and in subsequent 29 days, only has pole Individual cells at the 2nd~3 day and weld seam trachoma leakage occur.
Illustrate those subtle weld seam leakages or there are the batteries of potential weld seam leakage defect, can be mentioned because of the influence that high humidity environment corrodes
It is preceding to expose obviously weld seam leakage trace in full inspection appearance process and filtered out by identification easily.Also reflecting indirectly makes
Leakage battery failing to judge there are certain ratio is screened with conventional high-temperature aging method.
Be content above it is that a further detailed description of the present invention in conjunction with specific preferred embodiments, cannot recognizes
Fixed specific implementation of the invention is only limited to these explanations.Person of an ordinary skill in the technical field of the invention is come
It says, without departing from the inventive concept of the premise, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to this hair
Bright protection scope.
Claims (4)
1. a kind of method for screening rectangular lithium ion battery leakage, which is characterized in that rectangular lithium ion battery is placed on high humidity ring
A period of time is shelved in border, by manually visualizing full inspection weld appearance, filters out leakage rectangular lithium ion battery.
2. the method for screening rectangular lithium ion battery leakage according to claim 1, which is characterized in that high humidity environment temperature
Preferably 35~45 DEG C.
3. the method for screening rectangular lithium ion battery leakage according to claim 1, which is characterized in that high humidity environment is opposite
Humidity is preferably 85~95 RH%.
4. the method for screening rectangular lithium ion battery leakage according to claim 1, which is characterized in that described to shelve one section
Time is preferably 2~5 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811545652.8A CN109701909A (en) | 2018-12-18 | 2018-12-18 | A method of screening rectangular lithium ion battery leakage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811545652.8A CN109701909A (en) | 2018-12-18 | 2018-12-18 | A method of screening rectangular lithium ion battery leakage |
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| CN109701909A true CN109701909A (en) | 2019-05-03 |
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| CN201811545652.8A Pending CN109701909A (en) | 2018-12-18 | 2018-12-18 | A method of screening rectangular lithium ion battery leakage |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369674A (en) * | 2007-08-13 | 2009-02-18 | 黄穗阳 | Safe high-energy folding case lithium ion battery and its production technology |
| CN101398083A (en) * | 2007-09-25 | 2009-04-01 | 深圳市比克电池有限公司 | Container and lithium ion battery sealing method |
| CN105259506A (en) * | 2015-09-07 | 2016-01-20 | 杭州金色能源科技有限公司 | Examination method of forming die of plastic-aluminum composite membrane of polymer lithium-ion battery |
| CN107870069A (en) * | 2017-09-21 | 2018-04-03 | 湖南立方新能源科技有限责任公司 | A kind of secondary cell method for conducting leak test |
-
2018
- 2018-12-18 CN CN201811545652.8A patent/CN109701909A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369674A (en) * | 2007-08-13 | 2009-02-18 | 黄穗阳 | Safe high-energy folding case lithium ion battery and its production technology |
| CN101398083A (en) * | 2007-09-25 | 2009-04-01 | 深圳市比克电池有限公司 | Container and lithium ion battery sealing method |
| CN105259506A (en) * | 2015-09-07 | 2016-01-20 | 杭州金色能源科技有限公司 | Examination method of forming die of plastic-aluminum composite membrane of polymer lithium-ion battery |
| CN107870069A (en) * | 2017-09-21 | 2018-04-03 | 湖南立方新能源科技有限责任公司 | A kind of secondary cell method for conducting leak test |
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Application publication date: 20190503 |