CN106168652A - The detection method of performance of lithium ion battery - Google Patents
The detection method of performance of lithium ion battery Download PDFInfo
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- CN106168652A CN106168652A CN201610664840.7A CN201610664840A CN106168652A CN 106168652 A CN106168652 A CN 106168652A CN 201610664840 A CN201610664840 A CN 201610664840A CN 106168652 A CN106168652 A CN 106168652A
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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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The detection method of performance of lithium ion battery.The present invention is by different temperatures, use different charge-discharge magnification that lithium ion battery is carried out discharge and recharge process, after circulating 3～20 times, detect by battery being carried out analysis lithium, whether lithium can be analysed by inside battery negative terminal surface, assessment prediction battery, and the charging security under different temperatures, and the size of internal battery impedance is judged by the degree of analysis lithium, rapid evaluation risk in advance, shorten the time to battery synthetic performance evaluation, improve assessment efficiency, reduce the cost of cell performance evaluation, improve identification and the prevention ability of battery security risk, and test quantity has only to 10 20pcs.
Description
Technical field
The present invention relates to technical field of lithium ion, particularly relate to the detection method of a kind of performance of lithium ion battery.
Background technology
Lithium ion battery, as power supply portable, portable, has been applied to the every aspect of the modern life, has become the mankind
The indispensable necessarys such as life, commercial production.
But since lithium ion battery large-scale commercial is promoted, relative security incident is just almost without stopping
Stopped.The safety of lithium ion battery has become as key factor of its further development of restriction, therefore the making of lithium ion battery
Detect particularly important by life-span and security performance.
The test of existing cell performance evaluation typically to carry out omnibearing test by the number of batteries of 100-500pcs
Assessment, test number of batteries is huge, and especially for the test in service life, prior art is to be examined by cycle performance
Surveying, test period reaches more than 3 months, finds property abnormality, generally require and carry out repetition measurement or again open after once having tested
Sending out battery product, the project development cycle can be the most delayed.And some industry universal marks that polymer Li-ion battery is using
In standard, such as product specification book, national standard, UL1642, IEEE62133 etc., there is presently no for internal battery impedance is detailed
Examining survey and judge method and standard, risk identification is unsound, easily ignores some serious potential safety hazards, cause user frequency
The existing security incident that occurs frequently and can not find basic reason.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide the detection method of a kind of performance of lithium ion battery,
Can detect especially with the life-span quickly to lithium ion battery combination property.
The invention provides the detection method of a kind of performance of lithium ion battery, including:
At different temperatures, use different charge-discharge magnification that lithium ion battery carries out discharge and recharge process, circulate 3～20
Secondary, then carry out battery analysing lithium detection.
Preferably, described different temperatures is 0～25 DEG C.
Preferably, described different temperatures is 0 DEG C, 5 DEG C, 15 DEG C and 25 DEG C.
Preferably, described discharge and recharge process particularly as follows:
0.2C～2.0C is charged, and 0.5C discharges.
Preferably, described discharge and recharge process particularly as follows:
0.2C, 0.3C, 1.0C or 1.5C are charged, and 0.5C discharges；
Or 0.5C, 1.0C, 1.5C or 2.0C are charged, 0.5C discharges.
Preferably, described battery is carried out analyse lithium detection carry out in dry environments.
Present invention also offers the detection method of a kind of high energy density polymer performance of lithium ion battery, including:
A) carrying out 0.2C charging at 0 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
B) carrying out 0.3C charging at 5 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
C) carrying out 1.0C charging at 15 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
D) carrying out 1.5C charging at 25 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
Described step A), B), C), D) not order limit.
Present invention also offers the detection method of a kind of quick charge polymer Li-ion battery performance, including:
A) carrying out 0.5C charging at 0 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
B) carrying out 1.0C charging at 5 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
C) carrying out 1.5C charging at 15 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
D) carrying out 2.0C charging at 25 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
Described step A), B), C), D) not order limit.
Preferably, described step A), B), C), D) in either step, analysis lithium phenomenon occurs, i.e. stops detection.
Preferably, the detection method of described performance of lithium ion battery is the detection method in lithium ion battery service life.
The present invention, by different temperatures, uses different charge-discharge magnification that lithium ion battery is carried out discharge and recharge process,
After circulating 3～20 times, detecting by battery carries out analysis lithium, whether can analyse lithium by inside battery negative terminal surface, assessment is pre-
Survey the charging security under battery, and different temperatures, and judge internal battery impedance by the degree of analysis lithium
Size, in advance rapid evaluation risk, shorten the time to battery synthetic performance evaluation, improves assessment efficiency, reduces electricity
The cost of pond Performance Evaluation, improves identification and the prevention ability of battery security risk, and test quantity has only to 10-
20pcs。
Accompanying drawing explanation
Fig. 1 is the battery surface analysis lithium figure of embodiment 1；
Fig. 2 is the battery surface analysis lithium figure of embodiment 2；
Fig. 3 is the battery surface analysis lithium figure of embodiment 3；
Fig. 4 is the cycle performance figure of comparative example 1；
Fig. 5 is the battery surface analysis lithium figure of embodiment 4；
Fig. 6 is the battery surface analysis lithium figure of embodiment 5；
Fig. 7 is the battery surface analysis lithium figure of embodiment 6；
Fig. 8 is the cycle performance figure of comparative example 2.
Detailed description of the invention
The invention provides the detection method of a kind of performance of lithium ion battery, including:
At different temperatures, use different charge-discharge magnification that lithium ion battery carries out discharge and recharge process, circulate 3～20
Secondary, then carry out battery analysing lithium detection.
The present invention, by different temperatures, uses different charge-discharge magnification that lithium ion battery is carried out discharge and recharge process,
After circulating 3～20 times, detecting by battery carries out analysis lithium, whether can analyse lithium by inside battery negative terminal surface, assessment is pre-
Survey the charging security under battery, and different temperatures, and judge internal battery impedance by the degree of analysis lithium
Size, in advance rapid evaluation risk, shorten the time to battery synthetic performance evaluation, improves assessment efficiency, reduces electricity
The cost of pond Performance Evaluation, improves identification and the prevention ability of battery security risk, and test quantity has only to 10-
20pcs.Leak that the detection means of perfect existing routine exists and potential safety hazard, it is possible to avoid significant security risk to occur,
Solve the basic reason of most of security incident.
The lithium ion battery that the present invention is detected is preferably polymer Li-ion battery.
The temperature carrying out discharge and recharge process is preferably 0～25 DEG C, more preferably enters under the conditions of 0 DEG C, 5 DEG C, 15 DEG C and 25 DEG C
Row discharge and recharge processes.
Described discharge and recharge process particularly as follows:
0.2C～2.0C is charged, and 0.5C discharges.
Preferably, described discharge and recharge process particularly as follows:
0.2C, 0.3C, 1.0C or 1.5C are charged, and 0.5C discharges；
Or 0.5C, 1.0C, 1.5C or 2.0C are charged, 0.5C discharges.
The present invention, in charge and discharge process, keeps voltage consistent.That is use different charge-discharge magnification to lithium ion
Battery carries out discharge and recharge process, is equivalent to use different electric current that lithium ion battery is carried out discharge and recharge process.
Above-mentioned discharge and recharge processing cycle 3～can stop for 20 times, it is furthermore preferred that circulation 3～10 times, the present invention's
In some specific embodiment, cycle-index is 3 times, 10 times or 15 times.
Then the battery to test carries out analysing lithium detection.Concrete, first battery is dissected, obtain battery cathode material
Whether material, detecting its surface has whether analysis lithium phenomenon, i.e. negative material surface have lithium metal to separate out.
If there being analysis lithium phenomenon to occur, then show that this test internal battery impedance is excessive, do not meet performance requirement, there is peace
Full hidden danger, it is impossible to use for a long time.At the same time it can also be according to the amount of precipitation of negative terminal surface lithium metal, it is judged that internal battery impedance
Size.Amount of precipitation is the most, then explanation internal battery impedance is the biggest.
If after test terminates, negative terminal surface is not analysed lithium phenomenon and is occurred, then show that this battery conforms to quality requirements, it is possible to
Safe handling.
Described detection is carried out the most in dry environments, more preferably carries out under conditions of relative humidity is less than 1%.
Present invention also offers the detection method of a kind of high energy density polymer performance of lithium ion battery, including:
A) carrying out 0.2C charging at 0 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
B) carrying out 0.3C charging at 5 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
C) carrying out 1.0C charging at 15 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
D) carrying out 1.5C charging at 25 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
Described step A), B), C), D) not order limit.
Above-mentioned detection method is for high energy density polymer lithium ion battery, described high energy density polymer lithium from
Sub-battery is the polymer Li-ion battery that energy density is more than 680Wh/L.
Currently preferred, first detect at 0 DEG C, at a temperature of being somebody's turn to do, the undesirable battery of performance is easiest to appearance
Analysis lithium phenomenon, first carries out the detection of 0 DEG C, contributes to the saving time.
In above-mentioned charge and discharge process, keep voltage consistent, be i.e. equivalent to use different current versus cell to carry out at discharge and recharge
Reason.
Above-mentioned discharge and recharge processing cycle 3～can stop for 20 times, it is furthermore preferred that circulation 3～10 times, the present invention's
In some specific embodiment, cycle-index is 3 times.
Then the battery to test carries out analysing lithium detection.Concrete, first battery is dissected, obtain battery cathode material
Material, detects whether its surface has analysis lithium phenomenon.
Above-mentioned steps A), B), C), D) in either step, occur analysis lithium phenomenon, i.e. show this test internal battery impedance
Excessive, performance is undesirable, has potential safety hazard, it is impossible to use for a long time, now can stop detection, does not carry out remaining temperature
Detection under Du.Same, can be according to the amount of precipitation of negative terminal surface lithium metal, it is judged that the size of internal battery impedance.Separate out
Measure the most, then explanation internal battery impedance is the biggest.
Contrary, if each step does not all occur analysing lithium phenomenon, then show this test battery conformance with standard, can make safely
With.
Described detection is carried out the most in dry environments, more preferably carries out under conditions of relative humidity is less than 1%.
Present invention also offers the detection method of a kind of quick charge polymer Li-ion battery performance, including:
A) carrying out 0.5C charging at 0 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
B) carrying out 1.0C charging at 5 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
C) carrying out 1.5C charging at 15 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
D) carrying out 2.0C charging at 25 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
Described step A), B), C), D) not order limit.
Above-mentioned detection method is for quick charge polymer Li-ion battery, described quick charge polymer Li-ion electricity
Pond is can the polymer Li-ion battery of 1.5C quick charge.
Currently preferred, first detect at 0 DEG C, test result indicate that, at 0 DEG C, the undesirable electricity of performance
Pond is easiest to analysis lithium phenomenon occur, first carries out the detection of 0 DEG C, contributes to the saving time.
Above-mentioned steps A), B), C), D) in either step, occur analysis lithium phenomenon, i.e. show this test internal battery impedance
Excessive, performance is undesirable, has potential safety hazard, it is impossible to use for a long time, now can stop detection, does not carry out remaining temperature
Detection under Du.Same, can be according to the amount of precipitation of negative terminal surface lithium metal, it is judged that the size of internal battery impedance.Separate out
Measure the most, then explanation internal battery impedance is the biggest.
Contrary, if each step does not all occur analysing lithium phenomenon, then show this test battery conformance with standard, can make safely
With.
The detection of the voltage conditions of above-mentioned charge and discharge process, cycle-index, analysis lithium and condition thereof are gathered with above-mentioned high-energy-density
The detection method of compound performance of lithium ion battery, does not repeats them here.
The detection method of above-mentioned performance of lithium ion battery of present invention offer, high energy density polymer lithium ion battery
The detection method of energy, the detection method of quick charge polymer Li-ion battery performance, be primarily directed to lithium ion battery and use
Life-span and the detection method of internal battery impedance size.
The above-mentioned detection method that the present invention provides, test quantity only needs 10～20pcs, it is possible to obtains and detects accurately
Result.
The present invention uses above-mentioned fixing testing conditions, circulates less number of times, and uses less number of batteries,
Rapid evaluation prediction battery.Meanwhile, can be according to the analysis lithium situation on cell negative electrode material surface, it is judged that inside battery
Impedance conditions, confirms its application risk, shortens the time to the assessment of battery performance comprehensive detection, improves the safety of battery
Risk identification and prevention ability.Further, its testing result has passed through cycle performance detection checking, has higher accuracy.
In order to further illustrate the present invention, below in conjunction with the embodiment detection to the performance of lithium ion battery that the present invention provides
Method is described in detail.
Embodiment 1
High energy density polymer lithium ion battery is carried out following detection:
Carrying out 0.2C charging at 0 DEG C, 0.5C discharges, and circulates 3 times, dissects and detects analysis lithium situation, and result shows,
There is serious analysis lithium situation in its negative terminal surface, shows that internal battery impedance is excessive, and service life is the best, has security risk.
Its battery surface analysis lithium figure is shown in Fig. 1, and the most left figure is the analysis lithium figure of battery cathode front face surface, and right figure is that battery is born
The analysis lithium figure of pole backside surface.
Embodiment 2
High energy density polymer lithium ion battery is carried out following detection:
Carrying out 0.2C charging at 0 DEG C, 0.5C discharges, and circulates 20 times, dissects and detects analysis lithium situation, result table
Bright, there is more analysis lithium situation in its negative terminal surface, shows that internal battery impedance is relatively big, and service life is the best, has safety wind
Danger.
Its battery surface analysis lithium figure is shown in Fig. 2, and the most left figure is the analysis lithium figure of battery cathode front face surface, and right figure is that battery is born
The analysis lithium figure of pole backside surface.
Embodiment 3
For high energy density polymer lithium ion battery product, it is used for quickly detecting in the following ways:
Carrying out 0.2C charging at 0 DEG C, 0.5C discharges, and circulates 15 times, solves and dissects lithium analysis；Negative terminal surface is without analysis lithium phenomenon；
Carrying out 0.3C charging at 5 DEG C, 0.5C discharges, and circulates 15 times, solves and dissects lithium analysis；Negative terminal surface is without analysis lithium phenomenon；
Carrying out 1.0C charging at 15 DEG C, 0.5C discharges, and circulates 15 times, solves and dissects lithium analysis；Negative terminal surface is without analysis lithium phenomenon；
Carrying out 1.5C charging at 25 DEG C, 0.5C discharges, and circulates 15 times, solves and dissects lithium analysis；Negative terminal surface is without analysis lithium phenomenon；
Its battery surface analysis lithium figure is shown in Fig. 3, and the most left figure is the analysis lithium figure of battery cathode front face surface, and right figure is that battery is born
The analysis lithium figure of pole backside surface.As seen from Figure 3, after test terminates, negative terminal surface, entirely without analysis lithium phenomenon, shows battery
Internal driving is normal, has good service life and security performance.
Comparative example 1
Respectively the battery that embodiment 1 (being designated as 1#), embodiment 2 (being designated as 2#), embodiment 3 (being designated as 3#) are tested is followed
Ring performance detects, test condition: 25 DEG C, and 0.7C charges, and 1.0C discharges, and circulates 400 times, and test result is shown in that Fig. 4, Fig. 4 are for comparing
The cycle performance figure of example 1, wherein curve 1 is cycle performance curve corresponding for 1#, and curve 2 is that cycle performance corresponding for 2# is bent
Line, curve 3 is cycle performance curve corresponding for 3#.
As seen from Figure 4,1# occurs the phenomenon of capacity sharp-decay after 300 circulations；2# 400 times circulation time also
Occur that capacity accelerates decay；And stability during 3# loop test is the most normal.
Visible, that the present invention provides detection method, result is consistent with the test of the cycle performance of comparative example 1, has higher
Accuracy.
Embodiment 4
Quick charge polymer Li-ion battery is carried out following detection:
Carrying out 0.5C charging at 0 DEG C, 0.5C discharges, and circulates 3 times, dissects and detects analysis lithium situation, and result shows,
There is serious analysis lithium situation in its negative terminal surface, shows that internal battery impedance is excessive, and service life is the best, has security risk.
Its battery surface analysis lithium figure is shown in Fig. 5, and the most left figure is the analysis lithium figure of battery cathode front face surface, and right figure is that battery is born
The analysis lithium figure of pole backside surface.
Embodiment 5
Quick charge polymer Li-ion battery is carried out following detection:
Carrying out 0.5C charging at 0 DEG C, 0.5C discharges, and circulates 20 times, dissects and detects analysis lithium situation, result table
Bright, there is more analysis lithium situation in its negative terminal surface, shows that internal battery impedance is relatively big, and service life is the best, has safety wind
Danger.
Its battery surface analysis lithium figure is shown in Fig. 6, and the most left figure is the analysis lithium figure of battery cathode front face surface, and right figure is that battery is born
The analysis lithium figure of pole backside surface.
Embodiment 6
For quick charge polymer Li-ion battery product, it is used for quickly detecting in the following ways:
A) carrying out 0.5C charging at 0 DEG C, 0.5C discharges, circulate 15 times, battery carries out analyse lithium and detects；
B) carrying out 1.0C charging at 5 DEG C, 0.5C discharges, circulate 15 times, battery carries out analyse lithium and detects；
C) carrying out 1.5C charging at 15 DEG C, 0.5C discharges, circulate 15 times, battery carries out analyse lithium and detects；
D) carrying out 2.0C charging at 25 DEG C, 0.5C discharges, circulate 15 times, battery carries out analyse lithium and detects；
Its battery surface analysis lithium figure is shown in Fig. 7, and the most left figure is the analysis lithium figure of battery cathode front face surface, and right figure is that battery is born
The analysis lithium figure of pole backside surface.As seen from Figure 7, after test terminates, negative terminal surface, entirely without analysis lithium phenomenon, shows battery
Internal driving is normal, has good service life and security performance.
Comparative example 2
Respectively the battery that embodiment 4 (being designated as 4#), embodiment 5 (being designated as 5#), embodiment 6 (being designated as 6#) are tested is followed
Ring performance detects, test condition: 25 DEG C, and 1.5C charges, and 1.0C discharges, and circulates 400 times, and test result is shown in that Fig. 8, Fig. 8 are for comparing
The cycle performance figure of example 2, wherein curve 4 is cycle performance curve corresponding for 4#, and curve 5 is that cycle performance corresponding for 5# is bent
Line, curve 6 is cycle performance curve corresponding for 6#.
As seen from Figure 8,4# occurs the phenomenon of capacity sharp-decay after 300 circulations；5# is close to 400 circulations
Time also occur capacity accelerate decay；And stability during 6# loop test is the most normal.
Visible, that the present invention provides detection method, result is consistent with the test of the cycle performance of comparative example 2, has higher
Accuracy.
From above-described embodiment and comparative example, the method for testing of the rapid evaluation that the present invention provides, can be effective
Assessment in advance confirms to exist the polymer Li-ion battery product of risk, shortens the time to battery synthetic performance evaluation, carries
The identification of high battery security risk and prevention ability.
The explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.It is right to it should be pointed out that,
For those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out
Some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Claims (10)
1. the detection method of a performance of lithium ion battery, it is characterised in that including:
At different temperatures, use different charge-discharge magnification that lithium ion battery carries out discharge and recharge process, circulate 3～20 times, so
Carry out battery afterwards analysing lithium detection.
Detection method the most according to claim 1, it is characterised in that described different temperatures is 0～25 DEG C.
Detection method the most according to claim 2, it is characterised in that described different temperatures is 0 DEG C, 5 DEG C, 15 DEG C and 25
℃。
Detection method the most according to claim 1, it is characterised in that described discharge and recharge process particularly as follows:
0.2C～2.0C is charged, and 0.5C discharges.
Detection method the most according to claim 4, it is characterised in that described discharge and recharge process particularly as follows:
0.2C, 0.3C, 1.0C or 1.5C are charged, and 0.5C discharges；
Or 0.5C, 1.0C, 1.5C or 2.0C are charged, 0.5C discharges.
Detection method the most according to claim 1, it is characterised in that described carry out battery analyses lithium detection at dry environment
Under carry out.
7. the detection method of a high energy density polymer performance of lithium ion battery, it is characterised in that including:
A) carrying out 0.2C charging at 0 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
B) carrying out 0.3C charging at 5 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
C) carrying out 1.0C charging at 15 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
D) carrying out 1.5C charging at 25 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
Described step A), B), C), D) not order limit.
8. the detection method of a quick charge polymer Li-ion battery performance, it is characterised in that including:
A) carrying out 0.5C charging at 0 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
B) carrying out 1.0C charging at 5 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
C) carrying out 1.5C charging at 15 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
D) carrying out 2.0C charging at 25 DEG C, 0.5C discharges, circulate 3～20 times, battery carries out analyse lithium and detects；
Described step A), B), C), D) not order limit.
9. according to the detection method described in any one of claim 7 or 8, it is characterised in that described step A), B), C), D) in
, there is analysis lithium phenomenon, i.e. stops detection in either step.
10. according to the detection method described in any one of claim 1～8, it is characterised in that the inspection of described performance of lithium ion battery
Survey method is the detection method in lithium ion battery service life.
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| CN112436202A (en) * | 2020-10-22 | 2021-03-02 | 中车长春轨道客车股份有限公司 | Stepped current charging method for preventing lithium precipitation of lithium ion battery cathode |
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| CN112710957A (en) * | 2020-12-26 | 2021-04-27 | 清华大学 | Method and device for detecting lithium precipitation during battery charging and computer equipment |
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| CN113253122A (en) * | 2021-04-15 | 2021-08-13 | 同济大学 | Rapid lithium analysis detection method for lithium ion battery |
| CN113359047A (en) * | 2021-04-22 | 2021-09-07 | 万向一二三股份公司 | Method for evaluating influence of internal short circuit measurement on performance of lithium ion battery |
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