CN102608540B - Coulomb efficiency measuring method used for SOC (system-on-chip) evaluation of power battery - Google Patents
Coulomb efficiency measuring method used for SOC (system-on-chip) evaluation of power battery Download PDFInfo
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Abstract
一种用于动力电池SOC估计的库伦效率测定方法,涉及动力电池或动力电池组管理技术领域。发明目的在于为了解决现有技术计算库伦效率时没有考虑电池在实际使用时的容量范围,电池在充放电过程中自身的温度变化影响等原因导致库伦效率的不准确的问题。本方法具体步骤为将待检测电池进行HPPC测试,记录HPPC测试中的电压时间曲线和电流时间曲线;根据获得的电压时间曲线和电流时间曲线,计算脉冲功率能力与充电电量的关系曲线,并根据该曲线计算出最小放电深度和最大放电深度;计算出中间放电深度库伦效率;将电池充电到中间放电深度,做n次充电保持工况,将电池放光,计算出待测电池库伦效率。本方法用于电动汽车、可再生能源以及大规模储能领域电池库伦效率的测定。
A coulombic efficiency measurement method for estimating the SOC of a power battery relates to the technical field of power battery or power battery group management. The purpose of the invention is to solve the problem of inaccurate coulombic efficiency caused by the existing technology that does not consider the capacity range of the battery in actual use when calculating the coulombic efficiency, and the influence of the temperature change of the battery itself during the charging and discharging process. The specific steps of the method are to carry out the HPPC test on the battery to be tested, and record the voltage-time curve and current-time curve in the HPPC test; according to the obtained voltage-time curve and current-time curve, calculate the relationship curve between the pulse power capability and the charging capacity, and according to The curve calculates the minimum depth of discharge and the maximum depth of discharge; calculates the coulombic efficiency of the intermediate discharge depth; charges the battery to the intermediate discharge depth, performs n times of charging and holding conditions, discharges the battery, and calculates the coulombic efficiency of the battery to be tested. This method is used for the determination of battery Coulombic efficiency in the fields of electric vehicles, renewable energy and large-scale energy storage.
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Families Citing this family (19)
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CN102854470A (en) * | 2012-08-31 | 2013-01-02 | 哈尔滨工业大学 | Measurement method for estimating actual available capacity by SOC (state of charge) of power battery set |
CN103884989B (en) * | 2012-12-20 | 2016-12-28 | 北汽福田汽车股份有限公司 | A kind of coulombic efficiency detection method for electrokinetic cell SOC estimation |
CN104714178B (en) * | 2013-12-13 | 2017-10-10 | 北汽福田汽车股份有限公司 | The method of testing of battery charging and discharging boundary condition |
CN103884991A (en) * | 2013-12-17 | 2014-06-25 | 惠州市亿能电子有限公司 | Test method for single body cell DC internal resistance |
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CN104635166A (en) * | 2015-02-06 | 2015-05-20 | 芜湖大学科技园发展有限公司 | Evaluation method for health status of lithium batteries based on battery management system |
CN105116350B (en) * | 2015-09-30 | 2018-07-03 | 南京林业大学 | SOC variable quantities and discharge electricity amount conversion factor measuring method when power battery discharges |
CN105353316B (en) * | 2015-09-30 | 2018-07-03 | 南京林业大学 | Measurement method of SOC variation and charging power conversion coefficient during power battery charging |
CN105676138B (en) * | 2016-01-22 | 2018-09-14 | 广东志成冠军集团有限公司 | Method and system for predicting remaining capacity of battery |
CN105738821B (en) * | 2016-02-05 | 2018-12-25 | 惠州市蓝微新源技术有限公司 | The accurate method for calculating battery coulombic efficiency under different temperatures |
CN106042977A (en) * | 2016-06-29 | 2016-10-26 | 重庆小康工业集团股份有限公司 | Electromobile power reduction control method and system based on battery cell open-circuit voltage |
CN107356880B (en) * | 2017-07-13 | 2020-05-22 | 歌尔股份有限公司 | Battery electric quantity detection method |
CN108279385A (en) * | 2018-01-26 | 2018-07-13 | 深圳市道通智能航空技术有限公司 | State of charge evaluation method, device and the electronic equipment of battery |
CN110333447A (en) * | 2018-03-30 | 2019-10-15 | 比亚迪股份有限公司 | Battery power status SOP calculation method, device and the electric car of power battery pack |
CN109278588B (en) * | 2018-10-24 | 2020-06-12 | 重庆长安汽车股份有限公司 | A method of controlling the temperature of a lithium battery |
CN109490790B (en) * | 2019-01-23 | 2021-05-07 | 哈尔滨理工大学 | Lithium power battery power characteristic testing method and device using compensation pulse method |
CN110632520A (en) * | 2019-10-17 | 2019-12-31 | 西安工业大学 | A device for estimating power battery SOC and its estimating method |
CN112819196B (en) * | 2020-12-28 | 2023-10-10 | 国联汽车动力电池研究院有限责任公司 | Equivalent coulombic efficiency measuring method and power battery cycle life prediction method |
CN117113026A (en) * | 2023-08-18 | 2023-11-24 | 温州锌时代能源有限公司 | A SOC assessment method for zinc-bromine flow batteries based on linear regression prediction |
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WO2011133863A2 (en) * | 2010-04-22 | 2011-10-27 | Enerdel, Inc. | Monitoring of battery state of charge |
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