CN108508367A - The detection method of flexible-packed battery pole group short circuit - Google Patents
The detection method of flexible-packed battery pole group short circuit Download PDFInfo
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- CN108508367A CN108508367A CN201810181150.5A CN201810181150A CN108508367A CN 108508367 A CN108508367 A CN 108508367A CN 201810181150 A CN201810181150 A CN 201810181150A CN 108508367 A CN108508367 A CN 108508367A
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- battery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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Abstract
The present invention relates to a kind of detection methods of flexible-packed battery pole group short circuit, it is characterized in that：Pressure is applied to the battery under internal vacuum negative pressure condition by outside atmospheric pressure, ensure that the positive plate, diaphragm and negative plate of inside battery are in close contact, under the detection voltage effect of detection device, cause point discharge effect caused by inside battery impurity and defect stronger, and carries out pole group short-circuit detecting at this pressure.Advantageous effect：The present invention applies pressure by the atmospheric pressure in nature to the battery of internal negative pressure of vacuum, and it is carried out at the same time pole group short-circuit detecting at this pressure, to which underproof battery can more be effectively detected out, therefore solve the problems, such as that existing pole group method for detecting short circuit omission factor height, self-discharge battery can not be found and feed back in time.
Description
Technical field
The invention belongs to electrochemical field more particularly to a kind of detection methods of flexible-packed battery pole group short circuit.
Background technology
As what is required battery energy density is gradually increased, using flexible packing materials such as aluminum plastic films due to light-weight, add
Work is simple for process and ripe, is gradually applied in various field of batteries as the shell of battery.Battery capacity is higher and higher, electricity
Pool size is increasing, and manufacture craft also becomes increasingly complex.For the short-circuit detectings of larger capacity batteries, but there is much ask
Topic is badly in need of solving.
Currently, the pole group short circuit test method of generally use is just to complete test before unencapsulated, at battery pole group
Under the free state of no pressing force, the group short-circuit detection of the poles such as megger test or ac leakage is carried out, at this time in battery
The defects of contact between positive and negative plate and diaphragm is not tight, burr inside battery pole group cannot be completed to embody, in detection voltage
The point discharge effect unobvious of the generations such as internal flaw and impurity under signal function, unless using the very high detector of precision
Device, many internal flaws can not detected, therefore the recall rate of pole group short circuit is low, greatly, especially to capacity height, pole-piece area
Laminated batteries more than pole piece trimming side, there will be prodigious security risks.In addition, also it is proposed that a kind of new short-circuit detecting
Method (《Short-circuit test device after being assembled for lithium ion and test method》, Patent document number：102636720 A of CN are
Battery, short-circuit tester after assembly is all placed in vacuum glove box and carries out short-circuit detecting, i.e., entire battery is all in one
In fixed vacuum environment.If the battery in the patent seals after being equipped with without sealing, inside battery and outside are all located
Under identical subnormal ambient, this with to be in simultaneously under atmospheric pressure environment be the same, the pole group of inside battery can not be applied
Pressure can not be such that the building blocks such as positive plate, diaphragm, the negative plate in battery are in close contact.If assembly battery carries out
Sealing sealing is in then for metal shell battery (inside is generally normal pressure) due to being positioned over outside batteries in vacuum tank
Subnormal ambient, cell internal pressure are more than external pressure, and the power that shell is subject to is rather than ecto-entad, institute from inside to outside
With battery can outside bulging, be not achieved compress test purpose；For flexible-packed battery (its internal be generally higher negative pressure),
Even if reaching very little if absolute vacuum is extraneous to be applied to the pressure of inside battery in glove box.Therefore, the method root of the patent
Originally rational pressing force cannot be provided to inside battery pole group.
Currently, there are also new methods to carry out pole group short-circuit test, such as apply certain pressure in the group of pole, that is, compresses electricity
Short-circuit detecting is carried out while the group of pond pole, this method can improve short circuit battery recall rate to a certain extent, but the method changes
It into still there is limitation, i.e., can only reinforce in one direction, comprehensive guarantee can not be provided, can not realize complete pressure
Tight and contact, and special compression apparatus is needed, method is also more complicated.
Invention content
It is an object of the invention to overcome the shortcomings of above-mentioned technology, and provide a kind of detection of flexible-packed battery pole group short circuit
Method, it is intended to which the conventional detection pole group short-circuiting method omission factor that solution never applies pressure is high, applies the routine of pressing force to pole group
Method can only reinforce in one direction, and the problem that method is complicated, not easy to operate.
The present invention to achieve the above object, using following technical scheme：A kind of detection side of flexible-packed battery pole group short circuit
Method, it is characterized in that：Pressure is applied to the battery under internal vacuum negative pressure condition by outside atmospheric pressure, ensures inside battery
Positive plate, diaphragm and negative plate are in close contact, and under the detection voltage effect of detection device, lead to inside battery impurity and defect
Caused point discharge effect is stronger, and carries out pole group short-circuit detecting at this pressure, is as follows：
1) the battery pole group made is subjected to top margin by cell making process and side encapsulates；
2) battery vacuum-pumping by step 1) encapsulation seals, and inside battery is made to keep the vacuum degree under vacuum negative pressure condition；
3) pole group short-circuit detecting is carried out in atmospheric pressure to the battery that inside vacuumizes using short circuit tester, chooses and does not conform to
The battery of lattice.
The edge sealing position of the battery vacuum-pumping sealing of the step 2) is in the airbag side far from battery pole group ontology.
The negative pressure parameter area that the step 2) vacuumizes is -100kpa~-70kPa, and the internal negative pressure of the battery is protected
It is 1-20 seconds to hold the time.
The short circuit tester includes Insulation Resistance Tester or ac leakage instrument.
Advantageous effect：Compared with prior art, the present invention by the atmospheric pressure in nature to the electricity of internal negative pressure of vacuum
Pond applies pressure, and is carried out at the same time pole group short-circuit detecting at this pressure, at this time the positive plate of inside battery, diaphragm, negative plate
Equal building blocks are in close contact, and under the detection voltage effect of detection device, tip is put caused by inside battery impurity and defect
Electrical effect is stronger, to which underproof battery can more be effectively detected out, therefore solves existing pole group method for detecting short circuit leakage
The problem of inspection rate is high, self-discharge battery can not be found and feed back in time.
Description of the drawings
Fig. 1 is the flow chart of flexible-packed battery pole group method for detecting short circuit provided in an embodiment of the present invention；
Fig. 2 is the outline structural diagram of battery after vacuum-pumping and sealing described in test case of the present invention；
In figure：1, battery aluminum-plastic packaging film outer packing, 2, the aluminium pole ears containing hot melt adhesive, 3, the nickel lug containing hot melt adhesive, 4,
Closedtop side, 5, side sealing, 6, vacuumize rear edge sealing, 7, short circuit tester positive terminal, 8, short circuit tester negative pole end.
Specific implementation mode
With reference to the preferred embodiment specific implementation mode that the present invention will be described in detail.
The detection method for present embodiments providing a kind of group short circuit of flexible-packed battery pole, by outside atmospheric pressure to inside
Battery under vacuum negative pressure condition applies pressure, ensures that the positive plate, diaphragm and negative plate of inside battery are in close contact, is detecting
Under the detection voltage effect of device, cause point discharge effect caused by inside battery impurity and defect stronger, and in the pressure
Lower progress pole group short-circuit detecting, is as follows：
1) the battery pole group made is subjected to top margin by cell making process and side encapsulates；
2) battery vacuum-pumping by step 1) encapsulation seals, and inside battery is made to keep the vacuum degree under vacuum negative pressure condition；
3) pole group short-circuit detecting is carried out in atmospheric pressure to the battery that inside vacuumizes using short circuit tester, chooses and does not conform to
The battery of lattice.
The edge sealing position of the battery vacuum-pumping sealing of the step 2) is in the airbag side far from battery pole group ontology.Far
Purpose from battery pole group ontology is easy for the qualified battery of detection carrying out clip and then carries out fluid injection.
The negative pressure parameter area that the step 2) vacuumizes is -100kpa~-70kPa, and the internal negative pressure of the battery is protected
It is 1-20 seconds to hold the time, it is therefore an objective to make to ensure that inside battery reaches expected vacuum degree.
The short circuit tester includes Insulation Resistance Tester or ac leakage instrument.
The present invention detect battery electrochemical system include lithium rechargeable battery, lithium primary battery and lead-acid battery,
Ni-MH battery etc.；The shape of battery includes that square, round, Banana Type etc. are abnormally-structured；The pole group structure mode of battery includes volume
It is wound or stacked.
Operation principle
Flexible-packed battery pole group method for detecting short circuit of the present invention is using the atmospheric pressure in nature to internal negative pressure of vacuum
Battery apply pressure, ensure inside battery positive plate, diaphragm and negative plate be in close contact, in the detection voltage of detection device
Under effect, cause point discharge effect caused by inside battery impurity and defect stronger, while at this pressure to battery pole group
Positive and negative extreme carry out short-circuit detecting.
Embodiment 1
Attached drawing 1 is referred to, a kind of detection method of flexible-packed battery pole group short circuit includes the following steps：
S101：The battery pole group made is subjected to top margin by cell making process and side encapsulates；
S102：Vacuum-pumping and sealing makes the inside battery that completion previous step encapsulates reach negative pressure of vacuum；
It in the step, is carried out using negative pressure vaccum-pumping equipment, when detection, it is true that the battery encapsulated in step S101 is put into pumping
Then the negative pressure cavity of null device starts negative pressure vaccum-pumping equipment and is vacuumized, inside battery generation is made to reach certain vacuum degree；
S103：Pole group short-circuit detecting is carried out to the battery of the inner vacuum negative pressure using short circuit tester, is chosen unqualified
Battery.
After group short-circuit detecting chooses unqualified battery by above-mentioned steps pole, unqualified battery is subjected to individually placed, mark
Know and analyze, detection spec battery normal stream is reached into down one of fluid injection process.
In the embodiment of the present invention, the short circuit tester includes Insulation Resistance Tester or ac leakage instrument, is being carried out
When detection, short circuit tester adjusts test voltage ranging from 100V~250V, is sentenced by detecting insulating resistance value or leakage current value
Whether disconnected pole group is short-circuit.
When selecting Insulation Resistance Tester, test voltage can be set to 250V, insulating resistance value is more than the electricity of 2G Ω
Pond is judged as that spec battery, battery of the insulating resistance value less than 2G Ω are judged as the unqualified battery of pole group short circuit.
When stream leakage current detector is chosen friends in choosing, test voltage can be set to 200V, leakage current is more than to the battery of 50mA
It is judged as the battery (unqualified battery) of pole group short circuit, the battery less than or equal to 50mA is judged as spec battery.
Testing example of the present invention compares
Test case
Refer to attached battery structure shown in Fig. 2, to a capacity be about 2Ah polyalcohol flexible packing lamination lithium from
Sub- battery carries out pole group short-circuit test.Battery body size is 5mm thickness × 50mm wide × 95mm long, using 110um thickness × 120mm
The aluminum-plastic packaging film of width × 190mm long as battery outer packing shell, the battery pole group matrix size made be 0.1mm it is thick ×
5mm wide, aluminium pole ears and nickel lug containing hot melt adhesive are the anode ear and negative electrode lug respectively as battery.
The hot melt gel of above-mentioned battery pole group and aluminum-plastic packaging film are first subjected to top heat-seal, then carry out side
Encapsulation；By it is above-mentioned pushed up, the battery of side packing is put into the locating slot of negative pressure vacuum pumping sealing port machine, adjust the end socket of sealing machine with
The distance of battery body is 45mm or so, and it is -90kPa that parameter, which is set as negative pressure value, and the pumpdown time is 3 seconds, sealing time 3
Second.
The battery of vacuum-pumping and sealing is taken out, short-circuit detecting is carried out using Insulation Resistance Tester, tester parameter is set
It is set to 250V, the testing time is 2 seconds, and criterion is：Resistance value be more than 2G Ω be spec battery, be less than 2G Ω be short circuit (no
It is qualified).
Comparative example test case
To the battery of 400 laminations (encapsulated but non-intercell) by 1#, 2#...400# and so on mode into
Then row number carries out pole group short-circuit detecting, is first tested by common short circuit test method, according still further to side described in test case
Method carries out short-circuit repetition measurement.
Common short circuit test method is：Directly the pole group of lamination soldering polar ear is carried out using Insulation Resistance Tester
The detection parameters setting of short-circuit test, Insulation Resistance Tester is identical with criterion and test case.
Above two test method contrast test result see the table below, which lists the short circuit detected under two kinds of test methods
The model and quantity of battery.
It can be seen that from upper table, it is extremely low by the False Rate after the method detection of test case, and substantially increase battery short circuit
The recall rate of pole group.
To sum up, detection method is greatly improved the recall rate of short-circuit pole group, and can guarantee battery charge ability and
Consistency effectively avoids battery because of the even security risk of self discharge caused by missing inspection, therefore can greatly enhance battery use
The product use feeling at family and the safety of battery, this detection method is simple, easy to operate, and without increasing extras, very
Suitable for large-scale production application, it is of great practical significance.
The above-mentioned detailed description carried out to a kind of detection method of flexible-packed battery pole group short circuit with reference to embodiment, is to say
Bright property without being restrictive, several embodiments can be enumerated according to limited range, therefore of the invention total not departing from
Change and modification under body design, should belong within protection scope of the present invention.
Claims (4)
1. a kind of detection method of flexible-packed battery pole group short circuit, it is characterized in that：It is negative to inner vacuum by outside atmospheric pressure
Battery under pressure condition applies pressure, ensures that the positive plate, diaphragm and negative plate of inside battery are in close contact, in detection device
It detects under voltage effect, causes point discharge effect caused by inside battery impurity and defect stronger, and carry out at this pressure
Pole group short-circuit detecting, is as follows：
1) the battery pole group made is subjected to top margin by cell making process and side encapsulates；
2) battery vacuum-pumping by step 1) encapsulation seals, and inside battery is made to keep the vacuum degree under vacuum negative pressure condition；
3) pole group short-circuit detecting is carried out in atmospheric pressure to the battery that inside vacuumizes using short circuit tester, chosen underproof
Battery.
2. the detection method of flexible-packed battery pole according to claim 1 group short circuit, it is characterized in that：The electricity of the step 2)
The edge sealing position of pond vacuum-pumping and sealing is in the airbag side far from battery pole group ontology.
3. the detection method of flexible-packed battery pole according to claim 1 or 2 group short circuit, it is characterized in that：The step 2)
The negative pressure parameter area vacuumized is-100kpa~-70kPa, and the internal negative pressure retention time of the battery is 1-20 seconds.
4. the detection method of flexible-packed battery pole according to claim 1 group short circuit, it is characterized in that：The short circuit tester
Including Insulation Resistance Tester or ac leakage instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810181150.5A CN108508367A (en) | 2018-03-06 | 2018-03-06 | The detection method of flexible-packed battery pole group short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810181150.5A CN108508367A (en) | 2018-03-06 | 2018-03-06 | The detection method of flexible-packed battery pole group short circuit |
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| Publication Number | Publication Date |
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| CN108508367A true CN108508367A (en) | 2018-09-07 |
Family
ID=63377197
Family Applications (1)
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| CN201810181150.5A Pending CN108508367A (en) | 2018-03-06 | 2018-03-06 | The detection method of flexible-packed battery pole group short circuit |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490792A (en) * | 2018-10-19 | 2019-03-19 | 合肥国轩高科动力能源有限公司 | Method for selecting fault battery in self-discharge large module of lithium ion battery |
| CN109581230A (en) * | 2018-11-27 | 2019-04-05 | 上海理工大学 | Soft-package battery outer surface constant pressure that compressed gas is adjustable pre-tightens test device and method |
| CN110426647A (en) * | 2019-07-03 | 2019-11-08 | 江西恒动新能源有限公司 | A kind of power lithium-ion battery negative pressure survey short-circuiting method |
| CN111077451A (en) * | 2019-11-27 | 2020-04-28 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Lithium ion battery voltage withstanding test method |
| CN111090052A (en) * | 2019-11-27 | 2020-05-01 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Method for detecting burrs of pole group of reserve lithium battery |
| CN111722129A (en) * | 2020-06-01 | 2020-09-29 | 国联汽车动力电池研究院有限责任公司 | Battery micro short circuit detection method and system |
| CN112014744A (en) * | 2019-05-30 | 2020-12-01 | 万向一二三股份公司 | Method for evaluating influence of pole piece surface defects on performance of lithium ion battery |
| CN112068007A (en) * | 2020-07-31 | 2020-12-11 | 天津力神电池股份有限公司 | Method for detecting consistency of battery pole group |
| CN112462277A (en) * | 2020-11-13 | 2021-03-09 | 珠海冠宇电池股份有限公司 | Method for detecting self-discharge performance of lithium ion battery |
| CN112763919A (en) * | 2021-02-02 | 2021-05-07 | 江苏塔菲尔新能源科技股份有限公司 | Method and system for detecting internal short circuit abnormality of power battery |
| CN113711071A (en) * | 2019-09-18 | 2021-11-26 | 株式会社Lg新能源 | Pressurized short circuit inspection apparatus for detecting low-voltage defective pouch type secondary battery cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490792A (en) * | 2018-10-19 | 2019-03-19 | 合肥国轩高科动力能源有限公司 | Method for selecting fault battery in self-discharge large module of lithium ion battery |
| CN109581230A (en) * | 2018-11-27 | 2019-04-05 | 上海理工大学 | Soft-package battery outer surface constant pressure that compressed gas is adjustable pre-tightens test device and method |
| CN112014744B (en) * | 2019-05-30 | 2023-07-07 | 万向一二三股份公司 | Evaluation method for influence of pole piece surface defects on performance of lithium ion battery |
| CN112014744A (en) * | 2019-05-30 | 2020-12-01 | 万向一二三股份公司 | Method for evaluating influence of pole piece surface defects on performance of lithium ion battery |
| CN110426647A (en) * | 2019-07-03 | 2019-11-08 | 江西恒动新能源有限公司 | A kind of power lithium-ion battery negative pressure survey short-circuiting method |
| CN113711071A (en) * | 2019-09-18 | 2021-11-26 | 株式会社Lg新能源 | Pressurized short circuit inspection apparatus for detecting low-voltage defective pouch type secondary battery cell |
| CN113711071B (en) * | 2019-09-18 | 2023-09-01 | 株式会社Lg新能源 | Pressurized short circuit inspection apparatus for detecting low-voltage defect pouch type secondary battery cell |
| CN111090052A (en) * | 2019-11-27 | 2020-05-01 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Method for detecting burrs of pole group of reserve lithium battery |
| CN111077451B (en) * | 2019-11-27 | 2022-05-13 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Lithium ion battery voltage withstanding test method |
| CN111077451A (en) * | 2019-11-27 | 2020-04-28 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Lithium ion battery voltage withstanding test method |
| CN111722129A (en) * | 2020-06-01 | 2020-09-29 | 国联汽车动力电池研究院有限责任公司 | Battery micro short circuit detection method and system |
| CN111722129B (en) * | 2020-06-01 | 2023-08-15 | 国联汽车动力电池研究院有限责任公司 | Battery micro-short circuit detection method and system |
| CN112068007A (en) * | 2020-07-31 | 2020-12-11 | 天津力神电池股份有限公司 | Method for detecting consistency of battery pole group |
| CN112068007B (en) * | 2020-07-31 | 2023-08-04 | 力神（青岛）新能源有限公司 | Method for detecting consistency of battery pole group |
| CN112462277A (en) * | 2020-11-13 | 2021-03-09 | 珠海冠宇电池股份有限公司 | Method for detecting self-discharge performance of lithium ion battery |
| CN112763919A (en) * | 2021-02-02 | 2021-05-07 | 江苏塔菲尔新能源科技股份有限公司 | Method and system for detecting internal short circuit abnormality of power battery |
| CN112763919B (en) * | 2021-02-02 | 2024-01-09 | 江苏正力新能电池技术有限公司 | Method and system for detecting short circuit abnormality in power battery |
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