| Related citation: | Lin He,Mingwei Wang,Yujiang Wei,Pengcheng Rui,Shengjie Yu,Qin Shi.State-of-Health Map of Lithium-ion Batteries Established by ICE Map Approach[J].Journal of Harbin Institute Of Technology(New Series),2022,29(3):57-66.DOI:10.11916/j.issn.1005-9113.20085. |
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| Author Name | Affiliation | | Lin He | Laboratory of Automotive Electrification and Intelligent Connection, Hefei University of Technology, Hefei 230009, China | | Mingwei Wang | Laboratory of Automotive Electrification and Intelligent Connection, Hefei University of Technology, Hefei 230009, China | | Yujiang Wei | School of Automotive and Traffic Engineering, Hefei University of Technology, Hefei 230009, China | | Pengcheng Rui | Laboratory of Automotive Electrification and Intelligent Connection, Hefei University of Technology, Hefei 230009, China | | Shengjie Yu | Laboratory of Automotive Electrification and Intelligent Connection, Hefei University of Technology, Hefei 230009, China | | Qin Shi | School of Automotive and Traffic Engineering, Hefei University of Technology, Hefei 230009, China |
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| Abstract: |
| 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. |
| Key words: lithium-ion batteries state-of-health ICE map nominal SOH SOH map |
| DOI：10.11916/j.issn.1005-9113.20085 |
| Clc Number:TM912 |
| Fund: |
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| Descriptions in Chinese: |
| 通过内燃机外特性曲线图的方法建立锂离子电池健康状况图 贺林1，王铭伟1，魏宇江2，芮鹏程1，俞圣杰1，石琴2* （1. 合肥工业大学 汽车智能与电动实验室，合肥 230009； 2 合肥工业大学 汽车与交通工程学院，合肥 230009） 摘要：锂离子电池的电池健康状态（SOH）反映了锂离子电池的寿命信息。因此，准确估计锂离子电池运行过程中的SOH是非常必要的。本文提出一个SOH图来描述锂离子电池的健康状况。直流内阻（DCR）和开路电压（OCV）是锂离子电池的两个关键参数，可以通过测量和计算得到。由于环境温度的严重影响，提出了温度换算法，将不同温度下的DCR/OCV换算成25℃时的标称值，并与内燃机外特性曲线图（ICE Map）进行比较，用标称DCR和OCV来表示SOH，可以查到标称SOH值。在SOH图中，一对DCR和OCV只能映射出一个唯一的SOH，有利于工程应用。 关键词：锂离子电池，健康状态，内燃机外特性曲线图，标称SOH，SOH图 |
