摘要
通过改进单粒子模型(SP+模型)对电池基本参数进行预测及限制负极电位来获得充电安全边界是快充策略应用的有效评估方法。SP+模型需建立在三电极电池的基础上,在各种特性上与真实电池有一定的区别,这导致利用负极电位评估方法在预测精度上存在一定的差异。针对上述问题建立电池基本反应模型,将修正因子导入到涉及SOC、正负极电位、正负极嵌锂浓度的电池平衡电动势表达式中,设置相应的测试计划对修正因子进行标定,实现在25℃和特定SOC情况下对三元锂离子电池平衡电动势及正负极电势预测精度的提升,为后续安全边界评估开路正负极电位预测值提供参考。
The improved single particle model(SP+model)can be used to predict the basic parameters of the battery,and the charging safety boundary can be obtained by limiting the anode potential.The method is effective for the application of fast charging strategy.SP+model is built on the basis of the ternary lithium ion,there are differences in many characteristics against the real battery.This results in some differences in prediction accuracy of negative potential evaluation methods.The basic reflection model of battery is studied,and the correction factors are introduced into the expression,which is referred to the SOC,the cathode and anode potentials,and the lithium insertion concentration.The correction factors are calculated by carrying out the charging and discharging test.The equilibrium potential of battery and the cathode and anode potentials can be counted on in the case of 25℃and specific SOC.The effectiveness of this method is verified through comparative experiments,which can provide reference for the prediction values of the cathode and anode open circuit potentials.
作者
徐伟
周显松
许铀
周开晴
姚锦祥
郑振兴
Xu Wei;Zhou Xiansong;Xu You;Zhou Kaiqing;Yao Jingxiang;Zheng Zhenxing(Guangdong Polytechnic Normal University,Guangzhou 510635,China)
出处
《黑龙江科学》
2024年第4期94-98,共5页
Heilongjiang Science
基金
广州市重点研发计划专项(SL2022B03J00238)
广东技术师范大学博士点建设单位科研能力提升项目(22GPN UZDJS43)
广东省省级科技计划项目(2022A0505050017)
广东省高校教师特色创新研究项目(2021XJZZ01)。
