CN103840225A - Screening method for lithium ion battery - Google Patents

Screening method for lithium ion battery Download PDF

Info

Publication number
CN103840225A
CN103840225A CN201410118975.4A CN201410118975A CN103840225A CN 103840225 A CN103840225 A CN 103840225A CN 201410118975 A CN201410118975 A CN 201410118975A CN 103840225 A CN103840225 A CN 103840225A
Authority
CN
China
Prior art keywords
battery
dcr
internal resistance
constant
lithium ion
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.)
Granted
Application number
CN201410118975.4A
Other languages
Chinese (zh)
Other versions
CN103840225B (en
Inventor
刘炎金
张佳瑢
王晨旭
魏引利
李新静
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing fromage frais Oil Technology Co Ltd
Original Assignee
Hefei Guoxuan High Tech Power Energy Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hefei Guoxuan High Tech Power Energy Co Ltd filed Critical Hefei Guoxuan High Tech Power Energy Co Ltd
Priority to CN201410118975.4A priority Critical patent/CN103840225B/en
Publication of CN103840225A publication Critical patent/CN103840225A/en
Application granted granted Critical
Publication of CN103840225B publication Critical patent/CN103840225B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34Sorting according to other particular properties
    • B07C5/344Sorting according to other particular properties according to electric or electromagnetic properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C2301/00Sorting according to destination
    • B07C2301/0008Electronic Devices, e.g. keyboard, displays

Abstract

The invention discloses a screening method for a lithium ion battery. The screening method comprises the following steps: testing the capacity of a battery to be screened and fully charging; placing for 15-24 hours and calculating a difference value deltaDCR full between a discharging direct-current inner resistance and a charging direct-current inner resistance of each battery under a full-charge state; after testing the capacity of the battery to be screened, charging to 50% SOC; placing for 15-24 hours and calculating a difference value deltaDCR half between the discharging direct-current inner resistance and the charging direct-current inner resistance of each battery under a half-charge state; after testing the capacity of the battery to be screened, discharging; after placing for 15-24 hours, calculating a difference value deltaDCR empty between the discharging direct-current inner resistance and the charging direct-current inner resistance of each battery under an empty state; and screening the battery with the stable electric performance according to the deltaDCR full, the deltaDCR half and the deltaDCR empty of the grouped battery. According to the screening method for the lithium ion battery, the ratio of screening the batteries with the consistent performance can be greatly improved; the electric performance stability and the safety performance in the process of using the batteries in groups are improved and the service life of a battery pack is easy to prolong.

Description

A kind of screening technique of lithium ion battery
Technical field
The invention belongs to technical field of lithium ion, relate in particular to a kind of screening technique of lithium ion battery.
Background technology
Along with the exhaustion day by day of petroleum resources and the continuous deterioration of environment for human survival, the friendly type new forms of energy of development environment are extremely urgent, and especially developing using electricity work is inexorable trend as the electric motor car of power source.Lithium ion battery, because it has the high and low self-discharge rate of energy density, has extended cycle life and the advantage such as memoryless benefit, has been widely used in the special electric power systems such as mobile phone, notebook and electric motor car.Meanwhile, people are more and more higher to the requirement of electrical property in use of lithium battery and security performance.
In actual application, need multiple cells to be combined into battery pack by series-parallel mode, and the consistency of cell directly determines the performance of battery pack.Lithium battery performance index have voltage, capacity, power, cycle life and internal resistance etc., and for lithium battery, its internal resistance is one of of paramount importance characterisitic parameter of battery.At present, lithium battery is mainly self-discharge rate and the AC internal Resistance screening by test unit battery.But battery DC internal resistance in practical work process reflects time of day, filter out the battery that has hidden danger by the judgement of DC internal resistance, thereby avoid its life-span that affects whole battery pack and safety, greatly improve the performance of battery pack.Therefore increase having very important meaning for screening the method for battery in the research of lithium battery DC internal resistance.
Summary of the invention
The object of the present invention is to provide a kind of screening technique of lithium ion battery, it is according to being: Charging state is the abnormal conditions of battery charging and discharging polarization with the reflection of electric discharge state DC internal resistance difference, be beneficial to and filter out the battery that discharges and recharges high conformity, the combo consistency that improves battery pack, improves its stability in use.
Object of the present invention can be achieved through the following technical solutions:
A screening technique for lithium ion battery, the method specifically comprises the following steps:
(1) battery to be screened is unified to be full of electricity after the volume test under multiplying power in constant-temperature house, and in constant-temperature house, shelve after 15-24h, in constant-temperature house, battery is carried out to DC internal resistance test, calculating every battery discharge DC internal resistance under full electric state expires with the difference △ DCR of charging DC internal resistance;
(2) battery to be screened is unified to charge to 50%SOC after the volume test under multiplying power in constant-temperature house, and in constant-temperature house, shelve after 15-24h, in constant-temperature house, battery is carried out to DC internal resistance test, calculate under half electric state the difference △ DCR half of every battery discharge DC internal resistance and charging DC internal resistance;
(3) battery to be screened is unified in constant-temperature house to emptying electricity after the volume test under multiplying power, and in constant-temperature house, shelve after 15-24h, in constant-temperature house, battery is carried out to DC internal resistance test, the difference △ DCR sky of every battery discharge DC internal resistance and the DC internal resistance of charging under calculating clearancen electricity state;
(4), △ DCR half full according to the △ DCR of battery after grouping, △ DCR null value, filters out the battery of electric performance stablity.
The all battery DC internal resistances of the present invention test environment temperature is constant, error is no more than ± and 3 DEG C;
The △ DCR of battery of the present invention is full, △ DCR half, △ DCR null value are qualified battery in preset range, the preferred 0-10% △ of preset range DCR null value.
The present invention is full as the △ DCR of battery screening parameter, △ DCR half, △ DCR null value can be three and use, and can be also one of them or two.
Described preset range is not limited to described battery full electric state, empty electric state and half electric state, can be the arbitrary value in all state-of-charges of battery (SOC).
In described step (1), step (2), the method for testing of DC internal resistance comprises the following steps:
A, shelve 10s;
B, large electric current I 1pulsed discharge 10s;
C, shelve 40s;
D, 0.75I 1pulse current charge 10s;
E, end.
In described step (3), the method for testing of DC internal resistance comprises the following steps:
A, shelve 10s;
B, 0.75I 1pulse current charge 10s;
C, shelve 40s;
D, large electric current I 1pulsed discharge 5s;
E, end.
The DC internal resistance computing formula of step of the present invention (1), step (2), step (3) is as follows:
Put=(b work step pulsed discharge cut-ff voltage V1-a work step is shelved cut-ff voltage V0) ÷ I of DCR 1
Fill=(d work step pulsed discharge cut-ff voltage V1-c work step is shelved cut-ff voltage V0) ÷ (0.75I of DCR 1).
Beneficial effect of the present invention: the present invention can greatly improve the conforming battery ratio of screenability, improves electric performance stablity and the security performance of battery while using in groups, is conducive to extend battery pack useful life.
Brief description of the drawings
Fig. 1 DC internal resistance measuring current multiplying power-time diagram.
Fig. 2 is without DC internal resistance data screening battery power discharge cut-off Pressure difference distribution figure.
Fig. 3 is battery power discharge cut-off Pressure difference distribution figure after DC internal resistance data screening.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail.
Embodiment 1
1,30 IFP1865140-13AH rectangular cells are full of to electricity, in 25 DEG C of constant-temperature house, shelve 24h after with below work step test DC internal resistance: 1. shelve 10s 2. 5C constant-current discharge 10s 3. shelve 40s 4. 3.75C constant current charge 10s after 5. shelving 10s, finish.Measuring current-time relationship is as Fig. 1, and test result is as table 1.
Table 1
Battery is numbered 5,11,20,24 △ DCR as can be seen from Table 1 fullnot in preset range, can sentence it as abnormal battery.
2,30 IFP1865140-13AH rectangular cells are discharged to half electric state, after battery is shelved 24h in 25 DEG C of constant-temperature house, test, test DC internal resistance work step is identical with full electric state, and measuring current-time relationship is as Fig. 1, and test result is in table 2.
Table 2
According to preset range data from table can judge under half electric state, be numbered 35,43 and 51 be abnormal battery.
3,30 IFP1865140-13AH rectangular cells are discharged to 2.0V, in 25 DEG C of constant-temperature house, shelve 24h after with below work step test DC internal resistance: 1. shelve 10s 2. 3.75C constant current charge 10s 3. shelve 40s 4. 5C constant-current discharge 5s after 5. shelving 10s, finish; Measuring current-time relationship is as Fig. 1, and test result is in table 3.
Table 3
From the data of table 3, can obtain under clearancen electricity state, be numbered 66,73 and 88 be abnormal battery.
4, the battery combo with after this screening technique screening and the battery pack of not passing through this screening technique are carried out to the discharge test of normal temperature, voltage monitoring during to its electric discharge cut-off, as Fig. 2 and Fig. 3, can obviously be found out through battery voltage consistency after this screening technique screening better from Fig. 2, Fig. 3.
In sum, a kind of lithium battery screening technique provided by the invention, can the electric discharge DC internal resistance under different state-of-charges filter out with charging DC internal resistance the abnormal battery that has hidden danger by test battery, improve battery performance in use, reduce maintenance frequency, saved after cost.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection range of the present invention.

Claims (7)

1. a screening technique for lithium ion battery, is characterized in that, the method specifically comprises the following steps:
(1) battery to be screened is unified to be full of electricity after the volume test under multiplying power in constant-temperature house, and in constant-temperature house, shelve after 15-24h, in constant-temperature house, battery is carried out to DC internal resistance test, calculating every battery discharge DC internal resistance under full electric state expires with the difference △ DCR of charging DC internal resistance;
(2) battery to be screened is unified to charge to 50%SOC after the volume test under multiplying power in constant-temperature house, and in constant-temperature house, shelve after 15-24h, in constant-temperature house, battery is carried out to DC internal resistance test, calculate under half electric state the difference △ DCR half of every battery discharge DC internal resistance and charging DC internal resistance;
(3) battery to be screened is unified in constant-temperature house to emptying electricity after the volume test under multiplying power, and in constant-temperature house, shelve after 15-24h, in constant-temperature house, battery is carried out to DC internal resistance test, the difference △ DCR sky of every battery discharge DC internal resistance and the DC internal resistance of charging under calculating clearancen electricity state;
(4), △ DCR half full according to the △ DCR of battery after grouping, △ DCR null value, filters out the battery of electric performance stablity.
2. the screening technique of a kind of lithium ion battery according to claim 1, is characterized in that, all battery DC internal resistance test environment temperature are constant, error is no more than ± and 3 DEG C.
3. the screening technique of a kind of lithium ion battery according to claim 1, is characterized in that, the △ DCR of battery is full, △ DCR half, △ DCR null value are qualified battery in preset range, the preferred 0-10% △ of preset range DCR null value.
4. the screening technique of a kind of lithium ion battery according to claim 1, is characterized in that,, △ DCR half full as the △ DCR of battery screening parameter, △ DCR null value can be three and all use, and can be also one of them or two.
5. the screening technique of a kind of lithium ion battery according to claim 3, is characterized in that, described preset range is not limited to described battery full electric state, empty electric state and half electric state, can be the arbitrary value in all state-of-charges of battery (SOC).
6. the screening technique of a kind of lithium ion battery according to claim 1, is characterized in that, in described step (1), step (2), the method for testing of DC internal resistance comprises the following steps:
A, shelve 10s;
B, large electric current I 1pulsed discharge 10s;
C, shelve 40s;
D, 0.75I 1pulse current charge 10s;
E, end.
7. the screening technique of a kind of lithium ion battery according to claim 1, is characterized in that, in described step (3), the method for testing of DC internal resistance comprises the following steps:
A, shelve 10s;
B, 0.75I 1pulse current charge 10s;
C, shelve 40s;
D, large electric current I 1pulsed discharge 5s;
E, end.
?
CN201410118975.4A 2014-03-27 2014-03-27 A kind of screening technique of lithium ion battery Expired - Fee Related CN103840225B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410118975.4A CN103840225B (en) 2014-03-27 2014-03-27 A kind of screening technique of lithium ion battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410118975.4A CN103840225B (en) 2014-03-27 2014-03-27 A kind of screening technique of lithium ion battery

Publications (2)

Publication Number Publication Date
CN103840225A true CN103840225A (en) 2014-06-04
CN103840225B CN103840225B (en) 2016-09-14

Family

ID=50803500

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410118975.4A Expired - Fee Related CN103840225B (en) 2014-03-27 2014-03-27 A kind of screening technique of lithium ion battery

Country Status (1)

Country Link
CN (1) CN103840225B (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104103857A (en) * 2014-06-26 2014-10-15 天能电池集团有限公司 Group matching method of lead-acid storage batteries
CN105006597A (en) * 2015-05-18 2015-10-28 北京波士顿动力电池有限公司 Method for fast evaluating conformity of lithium ion battery electrode production with symmetric electrodes
CN105044616A (en) * 2015-08-09 2015-11-11 安徽普为智能科技有限责任公司 Lithium battery detection method
CN105510847A (en) * 2016-01-20 2016-04-20 四川长虹电器股份有限公司 Method for screening consistency of lithium ion batteries
CN105742729A (en) * 2014-12-12 2016-07-06 国家电网公司 Online safety pre-warning method for lithium-ion battery
CN104111377B (en) * 2014-08-06 2017-02-15 先进储能材料国家工程研究中心有限责任公司 Method for measuring DC (Direct Current) internal resistance of secondary battery in different charge states
WO2017161882A1 (en) * 2016-03-25 2017-09-28 北京新能源汽车股份有限公司 Power cell selection method
CN107422265A (en) * 2016-12-29 2017-12-01 深圳市科陆电子科技股份有限公司 A kind of detection method of cell uniformity
CN108878999A (en) * 2018-06-22 2018-11-23 中航锂电(江苏)有限公司 A kind of technique that ternary lithium ion single battery carries out PACK by polarization performance screening
CN108919127A (en) * 2018-05-17 2018-11-30 合肥国轩高科动力能源有限公司 A kind of method of DC internal resistance under express statistic secondary cell different temperatures and SOC
CN109557478A (en) * 2018-11-07 2019-04-02 上海恩捷新材料科技有限公司 A kind of lithium ion battery safety performance appraisal procedure
CN110280500A (en) * 2019-06-21 2019-09-27 深圳博磊达新能源科技有限公司 A kind of screening technique of lithium ion battery

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101907688A (en) * 2010-08-02 2010-12-08 天津力神电池股份有限公司 Method for detecting electrical property consistency of lithium ion battery
CN103018566A (en) * 2012-11-26 2013-04-03 力神迈尔斯动力电池系统有限公司 Lithium ion battery direct current internal resistance testing method and battery screening method
CN103302040A (en) * 2013-06-13 2013-09-18 高平唐一新能源科技有限公司 Screening method for lithium-ion battery consistency
CN103464388A (en) * 2013-09-26 2013-12-25 上海动力储能电池系统工程技术有限公司 Lithium ion battery screening method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101907688A (en) * 2010-08-02 2010-12-08 天津力神电池股份有限公司 Method for detecting electrical property consistency of lithium ion battery
CN103018566A (en) * 2012-11-26 2013-04-03 力神迈尔斯动力电池系统有限公司 Lithium ion battery direct current internal resistance testing method and battery screening method
CN103302040A (en) * 2013-06-13 2013-09-18 高平唐一新能源科技有限公司 Screening method for lithium-ion battery consistency
CN103464388A (en) * 2013-09-26 2013-12-25 上海动力储能电池系统工程技术有限公司 Lithium ion battery screening method

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104103857A (en) * 2014-06-26 2014-10-15 天能电池集团有限公司 Group matching method of lead-acid storage batteries
CN104111377B (en) * 2014-08-06 2017-02-15 先进储能材料国家工程研究中心有限责任公司 Method for measuring DC (Direct Current) internal resistance of secondary battery in different charge states
CN105742729B (en) * 2014-12-12 2019-03-08 国家电网公司 A kind of lithium ion battery safety on line method for early warning
CN105742729A (en) * 2014-12-12 2016-07-06 国家电网公司 Online safety pre-warning method for lithium-ion battery
CN105006597A (en) * 2015-05-18 2015-10-28 北京波士顿动力电池有限公司 Method for fast evaluating conformity of lithium ion battery electrode production with symmetric electrodes
CN105006597B (en) * 2015-05-18 2017-06-27 北京波士顿动力电池有限公司 With the method for symmetry electrode Fast Evaluation lithium ion cell electrode conformity of production
CN105044616A (en) * 2015-08-09 2015-11-11 安徽普为智能科技有限责任公司 Lithium battery detection method
CN105510847A (en) * 2016-01-20 2016-04-20 四川长虹电器股份有限公司 Method for screening consistency of lithium ion batteries
CN105510847B (en) * 2016-01-20 2018-10-19 四川长虹电器股份有限公司 The screening technique of lithium ion battery consistency
WO2017161882A1 (en) * 2016-03-25 2017-09-28 北京新能源汽车股份有限公司 Power cell selection method
CN107422265A (en) * 2016-12-29 2017-12-01 深圳市科陆电子科技股份有限公司 A kind of detection method of cell uniformity
CN108919127A (en) * 2018-05-17 2018-11-30 合肥国轩高科动力能源有限公司 A kind of method of DC internal resistance under express statistic secondary cell different temperatures and SOC
CN108919127B (en) * 2018-05-17 2020-12-04 合肥国轩高科动力能源有限公司 Method for rapidly counting direct current internal resistance of secondary battery under different temperatures and SOC (State of Charge)
CN108878999A (en) * 2018-06-22 2018-11-23 中航锂电(江苏)有限公司 A kind of technique that ternary lithium ion single battery carries out PACK by polarization performance screening
CN109557478A (en) * 2018-11-07 2019-04-02 上海恩捷新材料科技有限公司 A kind of lithium ion battery safety performance appraisal procedure
CN109557478B (en) * 2018-11-07 2020-12-15 上海恩捷新材料科技有限公司 Lithium ion battery safety performance evaluation method
CN110280500A (en) * 2019-06-21 2019-09-27 深圳博磊达新能源科技有限公司 A kind of screening technique of lithium ion battery

Also Published As

Publication number Publication date
CN103840225B (en) 2016-09-14

Similar Documents

Publication Publication Date Title
CN103840225A (en) Screening method for lithium ion battery
CN104935045B (en) Battery pack equalization method for energy storage system adopting nickel-series storage batteries
CN102760914B (en) Matching method for lithium ion power batteries
CN106824831A (en) A kind of manufacture method of the motive-power battery for improving lithium ion battery uniformity
CN205039569U (en) Lithium ion battery organizes balanced management system
CN102343334B (en) Dynamic sorting method and system for power batteries
CN102944849A (en) Rapid battery capacity detecting method for lithium ion batteries
CN103018566A (en) Lithium ion battery direct current internal resistance testing method and battery screening method
CN103008261A (en) Method for sorting degrees of self-discharging of lithium ion batteries
CN104269574A (en) Battery pack sorting method
CN103606715B (en) In conjunction with the constant amplitude pulse current charges method of positive negative pulse stuffing
CN102122832A (en) Lithium ion battery management system
CN103048623A (en) Method for quickly detecting self discharge rate of lithium iron phosphate lithium-ion battery
CN107294163B (en) Storage battery state inspection method and device with storage battery monomer balancing function
CN105244535B (en) A kind of method for separating of lithium rechargeable battery
CN105785270B (en) A kind of battery pack string energy state traffic coverage measurement method
CN202019034U (en) Lithium ion battery management system
CN102621498A (en) Online monitoring system for variable-pitch battery pack of wind-driven generator
CN204303945U (en) Equipment for generating lithium ion battery
Chen et al. Performance of inconsistency in lithium-ion battery packs for battery energy storage systems
CN103516027B (en) A kind of method and system suppressing DC power system resonance
CN106711525B (en) Extensive storage battery group management system and its method
CN203326628U (en) Intelligent management system of cell
CN104617342A (en) Lithium iron phosphate power battery grouping method
CN105574304A (en) Method for estimating SOC (State Of Charge) of lithium iron phosphate power battery packs

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
COR Change of bibliographic data
CB02 Change of applicant information

Address after: 230000 Yaohai Industrial Zone, Hefei New District, Anhui, No. D weft Road, No. 7

Applicant after: Hefei Guoxuan High-Tech Power Energy Co., Ltd.

Address before: 230000 Yaohai Industrial Park, Anhui, Hefei No. D weft Road, No. 7

Applicant before: Hefei Guoxuan High-Tech Power Energy Co., Ltd.

C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20190416

Address after: Room 389, No. 3 Binhan Road, Mentougou District, 102308 Beijing

Patentee after: Beijing fromage frais Oil Technology Co Ltd

Address before: 230000 WeiD Road, Yaohai Industrial Park, Xinzhan District, Hefei City, Anhui Province

Patentee before: Hefei Guoxuan High-Tech Power Energy Co., Ltd.

Effective date of registration: 20190416

Address after: Room 389, No. 3 Binhan Road, Mentougou District, 102308 Beijing

Patentee after: Beijing fromage frais Oil Technology Co Ltd

Address before: 230000 WeiD Road, Yaohai Industrial Park, Xinzhan District, Hefei City, Anhui Province

Patentee before: Hefei Guoxuan High-Tech Power Energy Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160914

Termination date: 20200327