锂离子电池SOC估算技术进展综述  

Review on SOC Estimation Techniques for Lithium-ion Battery

作　　者：刘志聪 张彦会[1] 王君琦 LIU Zhicong;ZHANG Yanhui;WANG Junqi(School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou Guangxi 545616,China)

机构地区：[1]广西科技大学机械与汽车工程学院,广西柳州545616

出　　处：《汽车零部件》2022年第12期91-95,共5页Automobile Parts

基　　金：柳州市科技计划项目(2019DH10603)。

摘　　要：锂离子电池凭借其高能量密度、较长的循环寿命以及低自放率等优点被广泛应用于汽车领域。电池的荷电状态(state of charge,SOC)作为电池的一个重要参数对电池性能的影响至关重要,对电池荷电状态进行实时精确的估算能够延长电池的使用寿命,方便驾驶员准确了解电池状态合理安排出行方案,确保行驶安全。然而由于锂离子电池在工作时是一个高度复杂且时变的非线性系统,其各项参数受到工作时温度及环境变换的影响较大。目前比较主流的荷电状态估算方法有安时积分法、开路电压法、基于模型和数据驱动等,本文主要介绍了4种方法的估算原理以及研究成果,并总结了各估算方法的优势与不足,最后对未来电池荷电状态估算方法进行了展望。Lithium-ion batteries have been widely used in the automotive field due to their advantages of high energy density,long cycle life and low self-discharge rate.As an important parameter of the battery,the state of charge(SOC)of the battery plays a crucial role in the performance of the battery.Real-time and accurate estimation of the state of charge of the battery can prolong the service life of the battery,facilitate the driver to accurately understand the state of the battery and make reasonable travel plans to ensure the safety of driving.However,Lithium-ion battery is a highly complex and time-varying nonlinear system in operation,and its parameters are greatly affected by temperature and environment change.At present,the mainstream state of charge estimation methods include ampere hour integration method,open circuit voltage method,model-based and data-driven method,etc.The estimation principles and research results of the four methods were mainly introduced,the advantages and disadvantages of each estimation method were summarized,and finally the future battery state of charge estimation methods was prospected.

关 键 词：电动汽车 锂离子电池 荷电状态 

分 类 号：TM912.6[电气工程—电力电子与电力传动]