State-of-Health Map of Lithium-ion Batteries Established by ICE Map Approach  

作　　者：Lin He Mingwei Wang Yujiang Wei Pengcheng Rui Shengjie Yu Qin Shi 

机构地区：[1]Laboratory of Automotive Electrification and Intelligent Connection,Hefei University of Technology,Hefei 230009,China [2]School of Automotive and Traffic Engineering,Hefei University of Technology,Hefei 230009,China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2022年第3期57-66,共10页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Key Research and Development Program of China(Grant No.2017YFB0103104);the Science and Technology Special Project of Anhui Province(Grant No.18030901063)。

摘　　要：State-of-health(SOH) is one of the main factors for lithium-ion batteries that indicate their life information. Thus it is essential to estimate SOH accurately during the operation of lithium-ion batteries. In this paper, an SOH map is proposed to illustrate the SOH of lithium-ion batteries by an internal combustion engine(ICE) map approach. Both direct current internal resistance(DCR) and open circuit voltage(OCV) are key parameters of lithium-ion batteries, which are obtained through metering and computing. Due to serious affection by environmental temperature, temperature translation is proposed to translate DCR/OCV of different temperature into a nominal value at 25 ℃. Compared with ICE map, SOH map is illustrated by the nominal DCR and OCV, which can be looked up to get a nominal SOH. In the SOH map, a pair of the DCR and the OCV can only map out a unique SOH, which is beneficial for application in engineering practice in most cases.

关 键 词：lithium-ion batteries STATE-OF-HEALTH ICE map nominal SOH SOH map 

分 类 号：TM912[电气工程—电力电子与电力传动]