CN104849670B - The test method of lithium ion battery life prediction - Google Patents
The test method of lithium ion battery life prediction Download PDFInfo
- Publication number
- CN104849670B CN104849670B CN201510257773.2A CN201510257773A CN104849670B CN 104849670 B CN104849670 B CN 104849670B CN 201510257773 A CN201510257773 A CN 201510257773A CN 104849670 B CN104849670 B CN 104849670B
- Authority
- CN
- China
- Prior art keywords
- battery
- lithium ion
- temperature
- ion battery
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of test methods of lithium ion battery life prediction, first record the rated capacity Cap of battery, re-record current value Ilf, and it is good and bad finally to qualitatively judge the lithium ion battery service life according to the Ilf/Cap results of battery.The present invention realizes the fast prediction to battery life according to the life time decay mechanism of lithium ion battery by test acquisition and the relevant characterisitic parameter of battery life of short time, reduces the testing time and personnel use, accelerate research and development of products progress.
Description
Technical field
The present invention relates to a kind of test methods of lithium ion battery life prediction.
Background technology
Lithium ion battery is widely used mobile digital product, in recent years also by as energy-storage system for electric vehicle it
In.Service life is to weigh the important indicator of battery performance, wide during the research and development of lithium ion battery, inspection and type selecting at present
The general life testing method used is that loop test is carried out under certain operating mode, and the major defect of circulation test algorithm is test period
It is long, even in some accelerated test schemes (such as select quick charge and discharge operating mode and tested under high temperature environment), usually
Still needing to thousands of a hours just can complete to test, caused by the result is that a large amount of test resource is occupied, research and development of products progress is slow.Cause
This will greatly shorten development time of Related product as can obtaining the relevant information of battery life in a short time, and in lithium ion
Battery is developed and the fields such as type selecting have prodigious application value.
Simultaneously literature research show (A.J.Smith, J.C.Burns, D.Xiong and J.R.Dahn,
Interpreting High Precision Coulometry Results on Li-ion Cells,
J.Electrochem.Soc.158, A1136-A1142, (2011))：It is secondary anti-present in the service life of lithium ion battery and battery
Correlation is answered, the big battery life of side reaction is short, therefore can be by measuring the size of side reaction in battery come the service life to battery
Carry out fast prediction.
Invention content
Purpose of the present invention is to：A kind of test method of lithium ion battery life prediction is provided, to pass through dozens of hour
Test can provide and lithium ion battery service life relevant characterisitic parameter, fast prediction of the realization to battery life.
The technical scheme is that：A kind of test method of lithium ion battery life prediction comprising following steps：
1) rated capacity of battery is measured：Battery is placed on to the environment temperature of the constant value any one in 20-30 DEG C of temperature
It among case, and is kept for the time at least more than two hours, so that the temperature of battery body is reached consistent with set temperature, later
The capacity of battery is tested, the rated capacity Cap of battery is recorded；
2) battery is placed among the environment incubator of the constant value any one in 20-50 DEG C of temperature, and is kept for two hours
More than, so that the temperature of battery body is reached consistent with set temperature, battery is charged under established temperature reach later
The voltage of battery is maintained the voltage value after corresponding open-circuit voltage values by one SOC value with constant pressure source, later the charging electricity of battery
Stream will be gradually decrease to a steady state value, and it is current value Ilf to record the steady state value；
3) Ilf/Cap of the battery is calculated as a result, qualitatively judging lithium ion battery service life quality.
Based on the above technical solution, it further includes the following affiliated technical solutions：
Ilf/Cap results are approximate with the battery capacity rate of decay directly proportional in the step S3.
SOC value in the step S2 is more than 80%, and temperature is 30-40 DEG C.
SOC value in the step S2 is more than 90%, and temperature is 40 DEG C.
Temperature in the step S1 is 30-40 DEG C.
Temperature in the step S1 is 20-30 DEG C.
The method have the advantages that：
The present invention is related to battery life by the test acquisition of short time according to the life time decay mechanism of lithium ion battery
Characterisitic parameter, realize to the fast prediction of battery life, reduce the testing time and personnel use, accelerate research and development of products progress.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and embodiments：
Fig. 1 is the correspondence table of the SOC-OCV of certain model lithium manganate battery in the prior art.
Specific implementation mode
Embodiment：Document just as mentioned previously show lithium ion battery service life and battery present in side reaction
Correlation, the big battery life of side reaction is short, can be carried out to the service life of battery by measuring the size of side reaction in battery pre-
It surveys.Side reaction in battery need to consume the electricity of battery, cause the decline of cell voltage, if being intended to maintain cell voltage a certain
Definite value, external circuit need to use certain current versus cell to supplement electricity, and the size of required size of current and side reaction has one by one
Corresponding relationship proposes to realize that the service life to lithium ion battery carries out in advance by measuring the size of the current value in the present invention
It surveys.And the usually current value can change with the variation of SOC (the State of Charge charged states) values and temperature of battery.
The current value is big when SOC value is big, to reduce measurement error, preferably SOC value ＞ 80%, more preferably SOC value ＞ 90%.The electricity
Flow valuve becomes larger also as the raising of temperature, due to that may damage battery when temperature is excessively high, temperature is preferably 20~
50 DEG C, more preferably 30~40 DEG C.
Thus the present invention provides a kind of test methods of lithium ion battery life prediction, and include the following steps：
1) rated capacity of battery is measured：It is constant among 20-50 DEG C of environment incubator that battery is placed on temperature, and is protected
The time at least more than two hours is held, so that the temperature of battery body is reached consistent with set temperature, later to the appearance of battery
Amount is tested, as long as specifically being tested according to standard charge and discharge flow by battery charging and discharging equipment, records battery
Rated capacity Cap；
2) battery is placed among the environment incubator of the constant value any one in 20-50 DEG C of temperature, and is kept for two hours
More than, so that the temperature of battery body is reached consistent with set temperature, battery is charged under established temperature reach later
The voltage of battery maintains the voltage value after corresponding open-circuit voltage values (OCV) by one SOC value with constant pressure source, later battery
Charging current will be gradually decrease to a steady state value, and it is current value Ilf to record the steady state value, and the wherein SOC value of battery and OCV values is deposited
In corresponding relationship, and it is the SOC-OCV tables of certain model lithium manganate battery in the prior art to have relevant corresponding table, Fig. 1；
3) Ilf/Cap of the battery is calculated as a result, lithium ion battery service life quality is qualitatively judged, according to lithium-ion electric pool capacity
The amount rate of decay is approximate with Ilf/Cap values proportional, and it is the small batteries of the big battery ratio Ilf/Cap of Ilf/Cap that can get
Faster, service life is shorter for the rate of decay.
Thus applicant carries out verification test according to above method, is first placed in battery in 25 DEG C of environment incubator two hours
Normal process as defined in battery specification is pressed afterwards and carries out volume test, and the Cap-A for measuring A batteries is 10.2Ah, B battery Cap-B
For 11Ah.A batteries and B battery are placed in later in 40 DEG C of environment incubator and carry out charging to 4.150V after two hours and by voltage
The constant Ilf-A in 4.150V, measuring A batteries is 8.2mA, and the Ilf-B of B battery is 10.5mA.B battery Ilf/Cap values are about A
1.2 times of battery, the rate of decay ratio A batteries of qualitative forecasting B battery are fast accordingly, and the service life is shorter.Finally is carried out to A, B battery the longevity
Life actual measurement experiment, experimental result be 600 Capacity fadings 15.1% of A batteries, 600 capacity attenuations 18.7% of B battery,
That is the actual measurement rate of decay of B battery is about 1.24 times of A batteries, it is clear that and the present processes can realize quick life prediction,
Service life actual measurement experiment is needed not move through, lithium ion battery service life quality is qualitatively judged, the testing time is reduced and personnel uses, accelerate production
Product research and develop progress.
Certainly the above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow be familiar with technique
People can understand the content of the present invention and implement it accordingly, it is not intended to limit the scope of the present invention.It is all according to this hair
The equivalent transformation or modification that the Spirit Essence of bright main technical schemes is done, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of test method of lithium ion battery life prediction, it is characterised in that it includes the following steps：
S1 the rated capacity of battery) is measured：By battery be placed on the constant value any one in 20-50 DEG C of temperature environment incubator it
In, and kept for the time at least more than two hours, so that the temperature of battery body is reached consistent with set temperature, later to electricity
The capacity in pond is tested, and the rated capacity Cap of battery is recorded；
S2) battery is placed among the environment incubator of the constant value any one in 20-50 DEG C of temperature, and keep two hours with
On, so that the temperature of battery body is reached consistent with set temperature, battery is charged under established temperature reach one later
The voltage of battery is maintained the voltage value after corresponding open-circuit voltage values, later the charging current of battery by SOC value with constant pressure source
It will be gradually decrease to a steady state value, it is that current value Ilf, the current value Ilf and the pair in the battery are anti-to record the steady state value
The size answered has one-to-one relationship；
S3 the Ilf/Cap of the battery) is calculated as a result, qualitatively judging lithium ion battery service life quality.
2. a kind of test method of lithium ion battery life prediction as described in claim 1, it is characterised in that：The step S3
Middle Ilf/Cap results are approximate with the battery capacity rate of decay directly proportional.
3. a kind of test method of lithium ion battery life prediction as claimed in claim 2, it is characterised in that：The step S2
In SOC value be more than 80%, temperature be 30-40 DEG C.
4. a kind of test method of lithium ion battery life prediction as claimed in claim 3, it is characterised in that：The step S2
In SOC value be more than 90%, temperature be 40 DEG C.
5. a kind of test method of lithium ion battery life prediction as described in claim 1, it is characterised in that：The step S1
In temperature be 30-40 DEG C.
6. a kind of test method of lithium ion battery life prediction as described in claim 1, it is characterised in that：The step S1
In temperature be 20-30 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510257773.2A CN104849670B (en) | 2015-05-20 | 2015-05-20 | The test method of lithium ion battery life prediction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510257773.2A CN104849670B (en) | 2015-05-20 | 2015-05-20 | The test method of lithium ion battery life prediction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104849670A CN104849670A (en) | 2015-08-19 |
| CN104849670B true CN104849670B (en) | 2018-09-04 |
Family
ID=53849454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510257773.2A Expired - Fee Related CN104849670B (en) | 2015-05-20 | 2015-05-20 | The test method of lithium ion battery life prediction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104849670B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167739B (en) * | 2017-05-17 | 2019-11-05 | 力信（江苏）能源科技有限责任公司 | A kind of power battery life-span prediction method |
| CN108931726A (en) * | 2017-05-26 | 2018-12-04 | 神华集团有限责任公司 | SOC determines method and device, battery management system |
| CN111060835A (en) * | 2019-12-31 | 2020-04-24 | 湖州师范学院 | Method and system for predicting remaining life of lithium battery and readable storage medium |
| CN116754947A (en) * | 2023-08-21 | 2023-09-15 | 宁德时代新能源科技股份有限公司 | Battery stability evaluation method, device, equipment, storage medium and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1808165A (en) * | 2005-01-21 | 2006-07-26 | 三星Sdi株式会社 | Accelerated testing method of rapidly evaluating lifespan of fuel cell |
| CN101312259A (en) * | 2007-05-23 | 2008-11-26 | 仁宝电脑工业股份有限公司 | Charging method and system for regulating charging current |
| CN102353905A (en) * | 2011-07-01 | 2012-02-15 | 曙鹏科技（深圳）有限公司 | Prediction method for battery life and apparatus for detecting battery life |
| CN103163480A (en) * | 2013-03-29 | 2013-06-19 | 长城汽车股份有限公司 | Method for estimating health state of lithium battery |
| CN103698710A (en) * | 2013-12-12 | 2014-04-02 | 中南大学 | Prediction method for life cycle of battery |
| CN104502859A (en) * | 2014-12-31 | 2015-04-08 | 清华大学深圳研究生院 | Detection and diagnosis method for battery charge and battery health state |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4686140B2 (en) * | 2004-05-31 | 2011-05-18 | 株式会社Ｇｓユアサ | Battery charge state calculation device |
-
2015
- 2015-05-20 CN CN201510257773.2A patent/CN104849670B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1808165A (en) * | 2005-01-21 | 2006-07-26 | 三星Sdi株式会社 | Accelerated testing method of rapidly evaluating lifespan of fuel cell |
| CN101312259A (en) * | 2007-05-23 | 2008-11-26 | 仁宝电脑工业股份有限公司 | Charging method and system for regulating charging current |
| CN102353905A (en) * | 2011-07-01 | 2012-02-15 | 曙鹏科技（深圳）有限公司 | Prediction method for battery life and apparatus for detecting battery life |
| CN103163480A (en) * | 2013-03-29 | 2013-06-19 | 长城汽车股份有限公司 | Method for estimating health state of lithium battery |
| CN103698710A (en) * | 2013-12-12 | 2014-04-02 | 中南大学 | Prediction method for life cycle of battery |
| CN104502859A (en) * | 2014-12-31 | 2015-04-08 | 清华大学深圳研究生院 | Detection and diagnosis method for battery charge and battery health state |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104849670A (en) | 2015-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106680726B (en) | Method for testing cycle performance of lithium ion battery | |
| Baghdadi et al. | Lithium battery aging model based on Dakin’s degradation approach | |
| Ouyang et al. | A dynamic capacity degradation model and its applications considering varying load for a large format Li-ion battery | |
| CN107983667B (en) | Lithium ion battery matching method | |
| CN104062594B (en) | Lithium-ion-power cell method for group matching | |
| CN109856549B (en) | Evaluation method of electrode cycle attenuation mechanism of lithium ion battery | |
| CN105203965B (en) | A kind of energy storage battery test method | |
| CN105759213A (en) | Method for measuring storage battery residual capacity SOC | |
| CN104849670B (en) | The test method of lithium ion battery life prediction | |
| CN107219468A (en) | A kind of lithium ion battery self discharge screening technique and Li-ion batteries piles | |
| CN110244234A (en) | A kind of battery accelerating lifetime testing method | |
| CN107991627A (en) | A kind of lithium ion battery self discharge grade stage division | |
| CN102944849A (en) | Rapid battery capacity detecting method for lithium ion batteries | |
| CN107579298A (en) | Lithium ion battery grouping method | |
| JP2014222603A (en) | Inspection method for battery | |
| CN107607874A (en) | The bikini screening technique of quick charge/discharge lithium ion battery | |
| CN111438077A (en) | Method for rapidly screening and detecting echelon utilization performance of retired ternary soft package battery | |
| CN112858941B (en) | Acceleration test and service life evaluation method for lithium iron phosphate power battery | |
| CN109030567B (en) | Method for judging internal water content of lithium ion battery cell | |
| CN111426971A (en) | Method and device for measuring battery internal resistance component | |
| CN104979597A (en) | Lithium ion battery self-discharge method | |
| Hu et al. | Study on cycle-life prediction model of lithium-ion battery for electric vehicles | |
| CN112240986A (en) | Lithium precipitation and uniformity evaluation method for large-size soft package lithium ion battery | |
| CN108008313B (en) | Screening method for self-discharge of lithium ion battery | |
| CN103901353B (en) | Method for judging uniformity of all batteries of lithium ion battery pack and timing voltage measuring instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180904 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |