车用锂离子电池的SOC估算方法研究现状

SOC(State of charge),即电池的荷电状态,它描述的是电池的剩余容量,其数值上表示为电池剩余的荷电量占电池总电量的比值,常用百分数表示。它是电池状态的一个关键指标,SOC的准确估算可以有效的提高电池使用效率,延长电池的使用寿命。荷电状态不能通过直接测量获得,而是需要其它方式来估算。本文对车用锂离子电池SOC估算方法进行了简单的描述,分析了不同方法的优缺点,最后进行了总结。

Current Status of Research on SOC Estimation Methods of Li-ion Battery for Vehicle

SOC(State of charge),that is,the state of charge of the battery,describes the remaining capacity of the battery,and its value is expressed as the ratio of the remaining charge of the battery to the total capacity of the battery,usually expressed as a percentage.It is a key indicator of battery status,and accurate estimation of SOC can eff ectively improve battery effi ciency and extend battery life.The state of charge cannot be obtained by direct measurement,but needs to be estimated in other ways.This article briefl y describes the SOC estimation methods for automotive lithium-ion batteries,analyzes the advantages and disadvantages of diff erent methods,and fi nally summarizes them.