CN109061485A - A kind of SOC-OCV test method in lithium ion battery discharge process - Google Patents

A kind of SOC-OCV test method in lithium ion battery discharge process Download PDF

Info

Publication number
CN109061485A
CN109061485A CN201810703052.3A CN201810703052A CN109061485A CN 109061485 A CN109061485 A CN 109061485A CN 201810703052 A CN201810703052 A CN 201810703052A CN 109061485 A CN109061485 A CN 109061485A
Authority
CN
China
Prior art keywords
battery
discharge
temperature
soc
constant
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.)
Pending
Application number
CN201810703052.3A
Other languages
Chinese (zh)
Inventor
王利
厉运杰
姚丹
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.)
Hefei Guoxuan High Tech Power Energy 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 CN201810703052.3A priority Critical patent/CN109061485A/en
Publication of CN109061485A publication Critical patent/CN109061485A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644Constructional arrangements

Abstract

The present invention relates to the SOC-OCV test methods in a kind of lithium ion battery discharge process, comprising: after being full of battery with particular power at room temperature, and several hours is shelved at temperature to be measured;By selected multiplying power at temperature to be measured to battery carry out constant volume, by battery constant-current discharge several times afterwards by tension discharge to battery final voltage, take several times the sum of constant-current discharge capacity as final constant volume capacity;Battery is shelved at room temperature several hours until battery temperature restore to room temperature, it is fully charged with particular power constant current constant voltage;Battery is shelved into several hours at temperature to be measured, until battery temperature reaches to testing temperature;Battery is discharged by particular power, after the specific percentage of constant volume capacity electric discharge, battery standing 30min or more, record stands the voltage value of end.The capacity tested out by this method more meets capacity when SOC-OCV test, so that surveyed SOC and scheduled SOC are more close.

Description

A kind of SOC-OCV test method in lithium ion battery discharge process
Technical field
The present invention relates to lithium ion the field of test technology, and in particular to the SOC- in a kind of lithium ion battery discharge process OCV test method.
Background technique
SOC-OCV test method in common lithium ion battery discharge process are as follows: by battery at room temperature with specific times After rate is full of, and several hours are shelved at temperature to be measured, until battery temperature reaches to testing temperature;By selected multiplying power to Constant volume is carried out to battery under testing temperature, constant-current discharge is primary, takes constant-current discharge capacity as final constant volume capacity;Battery exists Shelve at room temperature several hours until battery temperature restore to room temperature, it is fully charged with particular power constant current constant voltage;Battery is to be measured At a temperature of shelve several hours, until battery temperature reaches to testing temperature;Battery discharges by particular power, holds by constant volume Amount is discharged after specific percentage, battery standing 30min or more, and record stands the voltage value of end, repeat the above steps until Battery capacity emptying;
Above-mentioned test method, has a problem that: carrying out constant volume to battery at temperature to be measured, constant-current discharge is primary, will It is set to constant volume capacity, but discharges when progress SOC-OCV test for multistep, and the capacity of battery multistep electric discharge, which is higher than, once to be put The capacity of electricity, so that surveyed SOC is not inconsistent with scheduled SOC.
Summary of the invention
The purpose of the present invention is to provide the SOC-OCV test method in a kind of lithium ion battery discharge process, this method The capacity tested out more meets capacity when SOC-OCV test, so that surveyed SOC and scheduled SOC are more close.
To achieve the above object, the invention adopts the following technical scheme:
A kind of SOC-OCV test method in lithium ion battery discharge process, comprises the following sequential steps:
(1) after being full of battery with particular power at room temperature, and several hours are shelved at temperature to be measured, until electricity Pond temperature reaches to testing temperature;
(2) constant volume is carried out to battery at temperature to be measured by selected multiplying power, then several times by battery constant-current discharge, only When last time is discharged by tension discharge to battery final voltage, take the sum of constant-current discharge capacity several times as finally Constant volume capacity;
(3) battery is shelved to several hours at room temperature until battery temperature restores to room temperature, with particular power constant current perseverance It presses fully charged;
(4) battery is shelved into several hours at temperature to be measured, until battery temperature reaches to testing temperature;
(5) battery is discharged by particular power, after the specific percentage of constant volume capacity electric discharge, battery standing 30min or more, record stand the voltage value of end, repeat the above steps until battery capacity is vented.
It further, further include electric discharge when its discharge time and SOC-OCV are tested during discharge in step (2) Number is consistent, and every time after electric discharge, battery needs to stand, twice two in the time of repose and SOC-OCV test process between electric discharge Time of repose between secondary SOC electric discharge is identical.
As shown from the above technical solution, the test side SOC-OCV in lithium ion battery discharge process of the present invention Method carries out constant volume to battery at temperature to be measured, and several times, electric discharge when discharge time and SOC-OCV are tested is secondary for constant-current discharge Number is consistent, takes several times that the sum of constant-current discharge capacity is as final constant volume capacity, the constant volume appearance measured through the above steps Amount, the constant volume capacity obtained compared to traditional test methods: the capacity for only taking constant-current discharge primary is constant volume capacity, and this method is surveyed The capacity tried out more meets capacity when SOC-OCV test;So that surveyed SOC and scheduled SOC are more close.
Specific embodiment
Embodiment 1
A kind of SOC-OCV test method in lithium ion battery discharge process, includes the following steps:
(1) it after being full of battery with 1C constant current constant voltage at room temperature, and is shelved under 0 degree 20 hours;
(2) constant volume is carried out to battery under 0 degree by 0.5C, constant-current discharge 20 times, only voltage is put when last time is discharged To battery final voltage as defined in enterprise: 2V stands 1h after electric discharge every time, takes the sum of 20 constant-current discharge capacity as final Constant volume capacity, be denoted as constant volume capacity 1;
(3) battery shelve at room temperature 10 hours until battery temperature restore to room temperature, it is fully charged with 1C constant current constant voltage;
(4) battery is shelved 20 hours under 0 degree;
(5) battery discharges by 0.5C, and after constant volume capacity electric discharge 5%, battery standing 1h, record stands end Voltage value, repeating the above steps, (voltage is put to battery final voltage as defined in enterprise: 2V), being obtained until battery capacity is vented First group of SOC-OCV test data, and total discharge capacity of entire SOC-OCV test process, are denoted as actual capacity 1.
Comparative example 1
SOC-OCV test is carried out, steps are as follows with traditional SOC-OCV test method to identical battery:
(1) it after being full of battery with 1C constant current constant voltage at room temperature, and is shelved under 0 degree 20 hours;
(2) constant volume is carried out to battery under 0 degree by 0.5C, constant-current discharge 1 time, takes the conduct of the sum of 1 constant-current discharge capacity Final constant volume capacity, is denoted as constant volume capacity 2;
(3) battery shelve at room temperature 10 hours until battery temperature restore to room temperature, it is fully charged with 1C constant current constant voltage;
(4) battery is shelved 20 hours under 0 degree;
(5) battery discharges by 0.5C, and after constant volume capacity electric discharge 5%, battery standing 1h, record stands end Voltage value, repeating the above steps, (voltage is put to battery final voltage as defined in enterprise: 2V), being obtained until battery capacity is vented Second group of SOC-OCV test data, and total discharge capacity of entire SOC-OCV test process, are denoted as actual capacity 2.
Shown in the table 1 that show that test result is as follows after testing by the above method, table 2:
Table 1
Table 2
By above-mentioned two groups of data as it can be seen that embodiment 1 tests the reality of obtained constant volume capacity and SOC-OCV test process Capacity is closer;1 data of embodiment actual measurement SOC closer to presumptive test SOC value, 1 data of comparative example actual measurement SOC it is bright The aobvious SOC value for deviateing presumptive test.As it can be seen that more close by the surveyed SOC of this method and scheduled SOC.
Embodiment described above only describe the preferred embodiments of the invention, not to of the invention Range is defined, and without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technology of the invention The various changes and improvements that scheme is made should all be fallen into the protection scope that claims of the present invention determines.

Claims (2)

1. the SOC-OCV test method in a kind of lithium ion battery discharge process, which is characterized in that comprise the following sequential steps:
(1) after being full of battery with particular power at room temperature, and several hours are shelved at temperature to be measured, until battery temperature Reach to testing temperature;
(2) constant volume is carried out to battery at temperature to be measured by selected multiplying power, then several times by battery constant-current discharge, only last By tension discharge to battery final voltage when primary electric discharge, take several times the sum of constant-current discharge capacity as final constant volume appearance Amount;
(3) battery is shelved at room temperature several hours until battery temperature restore to room temperature, filled with particular power constant current constant voltage Full electricity;
(4) battery is shelved into several hours at temperature to be measured, until battery temperature reaches to testing temperature;
(5) battery is discharged by particular power, is discharged after specific percentage by constant volume capacity, battery standing 30min with On, record stands the voltage value of end, repeats the above steps until battery capacity is vented.
2. the SOC-OCV test method in lithium ion battery discharge process according to claim 1, it is characterised in that: step Suddenly in (2), further include that discharge time when its discharge time and SOC-OCV are tested during discharge is consistent, discharge it every time Afterwards, battery needs to stand, twice the standing in the time of repose and SOC-OCV test process between electric discharge between SOC electric discharge twice Time is identical.
CN201810703052.3A 2018-06-30 2018-06-30 A kind of SOC-OCV test method in lithium ion battery discharge process Pending CN109061485A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810703052.3A CN109061485A (en) 2018-06-30 2018-06-30 A kind of SOC-OCV test method in lithium ion battery discharge process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810703052.3A CN109061485A (en) 2018-06-30 2018-06-30 A kind of SOC-OCV test method in lithium ion battery discharge process

Publications (1)

Publication Number Publication Date
CN109061485A true CN109061485A (en) 2018-12-21

Family

ID=64818086

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810703052.3A Pending CN109061485A (en) 2018-06-30 2018-06-30 A kind of SOC-OCV test method in lithium ion battery discharge process

Country Status (1)

Country Link
CN (1) CN109061485A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109782191A (en) * 2019-01-14 2019-05-21 湖南科霸汽车动力电池有限责任公司 OCV test method under nickel-metal hydride battery difference carried charge
CN110297189A (en) * 2019-07-08 2019-10-01 浙江艾罗网络能源技术有限公司 The method for assessing consistency of single string of batteries in a kind of battery modules

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102645635A (en) * 2012-03-31 2012-08-22 惠州市亿能电子有限公司 Device and method for testing corresponding relation between open circuit voltage (OCV) and system on chip (SOC)
CN103760495A (en) * 2014-01-24 2014-04-30 哈尔滨工业大学 Method for generating SOC source in BMS detection and method for testing SOC estimated accuracy
CN104297690A (en) * 2014-09-22 2015-01-21 北汽福田汽车股份有限公司 Lithium battery SOC-OCV curve determination method
CN106249171A (en) * 2016-09-18 2016-12-21 北京理工大学 A kind of electrokinetic cell system identification for the wide sampling interval and method for estimating state
CN106526486A (en) * 2016-08-30 2017-03-22 郑州轻工业学院 Construction method for lithium battery health life model
CN107785624A (en) * 2016-08-30 2018-03-09 郑州思辩科技有限公司 A kind of method for assessing lithium battery performance
CN107884721A (en) * 2017-11-16 2018-04-06 山西长征动力科技有限公司 A kind of accurate measurement method of vehicle-mounted lithium ion battery SOC OCV curves
CN108107366A (en) * 2017-11-10 2018-06-01 天津力神电池股份有限公司 The pre-judging method in inside lithium ion cell micro cell response voltage section
CN108226795A (en) * 2017-12-18 2018-06-29 合肥国轩高科动力能源有限公司 A kind of experimental method for promoting battery and using cycle life

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102645635A (en) * 2012-03-31 2012-08-22 惠州市亿能电子有限公司 Device and method for testing corresponding relation between open circuit voltage (OCV) and system on chip (SOC)
CN103760495A (en) * 2014-01-24 2014-04-30 哈尔滨工业大学 Method for generating SOC source in BMS detection and method for testing SOC estimated accuracy
CN104297690A (en) * 2014-09-22 2015-01-21 北汽福田汽车股份有限公司 Lithium battery SOC-OCV curve determination method
CN106526486A (en) * 2016-08-30 2017-03-22 郑州轻工业学院 Construction method for lithium battery health life model
CN107785624A (en) * 2016-08-30 2018-03-09 郑州思辩科技有限公司 A kind of method for assessing lithium battery performance
CN106249171A (en) * 2016-09-18 2016-12-21 北京理工大学 A kind of electrokinetic cell system identification for the wide sampling interval and method for estimating state
CN108107366A (en) * 2017-11-10 2018-06-01 天津力神电池股份有限公司 The pre-judging method in inside lithium ion cell micro cell response voltage section
CN107884721A (en) * 2017-11-16 2018-04-06 山西长征动力科技有限公司 A kind of accurate measurement method of vehicle-mounted lithium ion battery SOC OCV curves
CN108226795A (en) * 2017-12-18 2018-06-29 合肥国轩高科动力能源有限公司 A kind of experimental method for promoting battery and using cycle life

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
李求忠 等: "镍氢与镍镉电池的性能及其影响因素", 《宁德师专学报(自然科学版)》 *
蒋波: "带有模型参数提取的电池管理系统监控平台的设计", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 *
赵雪娟: "VRLA蓄电池SOC估算策略的研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109782191A (en) * 2019-01-14 2019-05-21 湖南科霸汽车动力电池有限责任公司 OCV test method under nickel-metal hydride battery difference carried charge
CN110297189A (en) * 2019-07-08 2019-10-01 浙江艾罗网络能源技术有限公司 The method for assessing consistency of single string of batteries in a kind of battery modules

Similar Documents

Publication Publication Date Title
CN104502859B (en) The detection of battery charge amount and cell health state, diagnostic method
CN105903692B (en) Lithium ion battery conformity classification method
CN104607395B (en) Lithium ion battery method for separating
CN102861726B (en) Lithium secondary battery consistency screening method
CN101907688B (en) Method for detecting electrical property consistency of lithium ion battery
CN103178306B (en) Equilibrium assembling method and equilibrium assembling system for lithium secondary battery
CN104111377B (en) Method for measuring DC (Direct Current) internal resistance of secondary battery in different charge states
CN104062594A (en) Lithium-ion power battery matching method
CN107511340B (en) A kind of lithium-ion-power cell sorting method for group matching
CN102944849A (en) Rapid battery capacity detecting method for lithium ion batteries
CN106654420B (en) Capacity of lithium ion battery method for separating
CN106093781A (en) A kind of power lithium-ion battery calendar life method of testing
CN106093794B (en) The high temperature service life accelerated test method of ferric phosphate lithium cell
CN107799843B (en) A kind of unbalanced method for charging battery pack considering temperature
CN107579298A (en) Lithium ion battery grouping method
CN109596987A (en) Lithium ion battery calendar life test method
CN108923080A (en) A kind of lithium ion battery grouping method
CN104617339A (en) Lithium ion battery group matching method
CN103675708A (en) Energy-efficient battery capacity sorting method
CN107703449A (en) The quick determination method of service life of lead accumulator
CN105728352A (en) Battery sorting method
CN102914744A (en) Mobile terminal, battery power display system of mobile terminal, and method for acquiring battery power
CN101614793A (en) A kind of method of evaluating consistency of batteries
CN109459703A (en) A kind of self discharge of lithium iron phosphate battery conformity classification method
WO2018209784A1 (en) Lithium precipitation detection method for battery, battery management system, and battery system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20181221