CN109490792A - A kind of fail battery selection method in the big mould group of lithium ion battery self discharge - Google Patents
A kind of fail battery selection method in the big mould group of lithium ion battery self discharge Download PDFInfo
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- CN109490792A CN109490792A CN201811222667.0A CN201811222667A CN109490792A CN 109490792 A CN109490792 A CN 109490792A CN 201811222667 A CN201811222667 A CN 201811222667A CN 109490792 A CN109490792 A CN 109490792A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
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Abstract
A kind of fail battery selection method in the big mould group of lithium ion battery self discharge can solve battery in the prior art and without modular cartridge pressure be difficult the technical issues of accurately finding fail battery.Include: S100, by pressure test device, measures pressure value of the modular battery to be measured in modular cartridge；S200, then modular battery to be measured resolved into each single battery and numbered be placed in fixture, the pressure in setting clamp, the pressure for keeping modular battery to be measured suffered in fixture in modular cartridge suffered by pressure it is consistent；S300, each single battery in the fixture adjusted to identical SOC again, stands several days, test each single battery pressure difference, the biggish single battery of pressure difference is to cause the big fail battery of mould group self discharge.The present invention simulates the pressure of battery module case by setting fixture, so that the abnormal battery of normal self discharge is exposed under no modular cartridge pressure condition, to efficiently find out the fail battery in the big mould group of lithium ion battery self discharge.
Description
Technical field
The present invention relates to technical field of lithium batteries, and in particular to the failure electricity in a kind of big mould group of lithium ion battery self discharge
Pond selection method.
Background technique
Because fossil energy is difficult to regenerate, increasingly in short supply, green novel energy source automobile obtains the extensive attention of countries in the world, more next
More new-energy automobiles appear on world market, are current new energy vapour by the electric car of power source of lithium ion battery
The main force of vehicle, has a vast market.Self-discharge of battery greatly and battery leakage be lithium ion battery mould group failure two it is big mainly
Type.For the stable structure of battery pack, usual battery is put in modular cartridge, and to fix battery location, modular cartridge is to electricity
There is certain pressure in pond.The mould group big for self discharge, it is generally the case that be that the battery in mould group is resolved into independent list
Body tests the self discharge of each monomer, and the big battery of self discharge is found out from multiple batteries.The above method, mould group are disassembled into monomer
Afterwards, each battery is that its self discharge is tested in the case where absolutely not extraneous constraint pressure, when no pressure, originally in mould group
Self discharge big battery show as the self discharge of normal battery since internal short-circuit of battery point may not contact directly, cause
This method can not find fail battery.
Summary of the invention
Fail battery selection method in the big mould group of a kind of lithium ion battery self discharge proposed by the present invention, can solve existing
By the dismantling of mould group at fail battery is selected after monomer in technology, since battery is difficult accurately to find failure electricity without modular cartridge pressure
The technical issues of pond.
To achieve the above object, the invention adopts the following technical scheme:
A, pass through pressure test device, when measuring battery in modular cartridge, pressure of the modular cartridge to battery；
B, modular battery is resolved into each single battery and numbered, each single battery is placed in fixture, in setting clamp
Pressure so that battery pressure suffered in fixture in module suffered by pressure it is consistent；
C, the battery in fixture is adjusted to same SOC, stands several days, test its pressure difference, the biggish battery of pressure difference is
Cause the big fail battery of mould group self discharge.
As shown from the above technical solution, the fail battery side of selecting in the big mould group of lithium ion battery self discharge of the invention
Method is all to carry out self discharge test, electricity in the case where there is fixture constraint after resolving into each single battery due to modular battery
Pond pressure suffered in fixture is consistent with pressure suffered in modular cartridge, so that under no modular cartridge pressure condition, normally
The abnormal battery of self discharge is exposed.The big mould group of lithium ion battery self discharge can efficiently be found out by this method
In fail battery.
Detailed description of the invention
Fig. 1 is flow diagram of the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
As shown in Figure 1, the fail battery selection method in the big mould group of lithium ion battery self discharge described in the present embodiment, packet
Include following steps:
S100, pass through pressure test device, when measuring modular battery to be measured in modular cartridge, pressure value of the modular cartridge to battery；
S200, then modular battery to be measured is resolved into each single battery and is numbered, each single battery is placed in fixture,
Pressure in setting clamp, so that pressure and pressure one suffered in modular cartridge that modular battery to be measured is suffered in fixture
It causes；
S300, each single battery in the fixture adjusted to identical SOC again, stands several days, tests each list
Body battery pressure difference, the biggish single battery of pressure difference are to cause the big fail battery of mould group self discharge.
Specific application example of the present invention:
A kind of fail battery selection method in the big mould group of lithium ion battery self discharge, includes the following steps:
A, by device for pressure measurement, voltage of the measurement battery in failure mould group (4 and 1 string) modular cartridge obtains module to electricity
The pressure in pond is 1000N；
B, mould group is dismantled, resolves into independent 4 battery cells and number 1#, 2#, 3#, 4#, each single battery is placed in
In fixture, pressure in setting clamp, so that battery pressure suffered in fixture is 1000N；
C, the battery by all in fixture is adjusted to 15%SOC, stands 2 days, is recorded and calculated each single battery and is stood 2 days
Voltage difference, the voltage difference of 1#, 2#, 3#, 4# battery is respectively 20mV, 10mV, 10mV, 10mV；Wherein 1# battery pressure difference is larger,
It is to cause the big fail battery of mould group self discharge;After the dismantling of 1# battery, it is found that it is damaged its diaphragm exists, battery is caused to be put certainly
Electricity is bigger than normal；
Comparative example 1
To identical battery, with traditional fail battery selection method, steps are as follows:
A, failure mould group (4 and 1 string) is dismantled, resolves into independent 4 battery cells and number 1#, 2#, 3#, 4#；
C, each battery is adjusted to 15%SOC, stands 2 days in the case where battery is without any constraint, records and calculates each list
2 days voltage differences of body battery standing, the voltage difference of 1#, 2#, 3#, 4# battery are respectively 10mV, 10mV, 10mV, 10mV；It is each
The pressure difference of battery is consistent, i.e., by conventional method, fails to find and cause the big fail battery of mould group self discharge.
Note: the test for the comparative example 1 that above-mentioned battery first carries out, the rear test for carrying out embodiment 1.
The big mould group of lithium ion battery self discharge is efficiently found from above-mentioned application example it is found that can be convenient by this method
In fail battery.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (2)
1. the fail battery selection method in a kind of big mould group of lithium ion battery self discharge, it is characterised in that: the following steps are included:
S100, pass through pressure test device, when measuring modular battery to be measured in modular cartridge, pressure value of the modular cartridge to battery；
S200, then modular battery to be measured is resolved into each single battery and is numbered, each single battery is placed in fixture,
Pressure in setting clamp, so that pressure and pressure one suffered in modular cartridge that modular battery to be measured is suffered in fixture
It causes；
S300, each single battery in the fixture adjusted to identical SOC again, stands several days, tests each list
Body battery pressure difference, the biggish single battery of pressure difference are to cause the big fail battery of mould group self discharge.
2. the fail battery selection method in the big mould group of lithium ion battery self discharge according to claim 1, feature exist
In: each single battery in the fixture is adjusted to identical SOC again in the step S300, stands 2 days, test is each
A single battery pressure difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811222667.0A CN109490792A (en) | 2018-10-19 | 2018-10-19 | A kind of fail battery selection method in the big mould group of lithium ion battery self discharge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811222667.0A CN109490792A (en) | 2018-10-19 | 2018-10-19 | A kind of fail battery selection method in the big mould group of lithium ion battery self discharge |
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| CN109490792A true CN109490792A (en) | 2019-03-19 |
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| CN201811222667.0A Pending CN109490792A (en) | 2018-10-19 | 2018-10-19 | A kind of fail battery selection method in the big mould group of lithium ion battery self discharge |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123117A (en) * | 2019-11-29 | 2020-05-08 | 合肥国轩高科动力能源有限公司 | Screening process for self-discharge of ternary lithium ion battery |
| CN111215355A (en) * | 2019-11-22 | 2020-06-02 | 昆山聚创新能源科技有限公司 | Method for screening lithium batteries for discharge |
| CN112379283A (en) * | 2020-10-22 | 2021-02-19 | 合肥国轩高科动力能源有限公司 | Self-discharge screening method for power battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111215355A (en) * | 2019-11-22 | 2020-06-02 | 昆山聚创新能源科技有限公司 | Method for screening lithium batteries for discharge |
| CN111123117A (en) * | 2019-11-29 | 2020-05-08 | 合肥国轩高科动力能源有限公司 | Screening process for self-discharge of ternary lithium ion battery |
| CN112379283A (en) * | 2020-10-22 | 2021-02-19 | 合肥国轩高科动力能源有限公司 | Self-discharge screening method for power battery |
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Application publication date: 20190319 |
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