电动汽车动力电池SOC估算方法综述

Summary of methods for state of charge estimation of EV power batteries

电池SOC估算是电动汽车电池管理系统中重要的一部分,由于电池SOC的估算受很多因素综合影响(如充放电倍率、环境温度、循环寿命、自放电等),所以很难保证SOC在实际应用中的估算精度。通过对SOC估算方法的综述,分析了各种方法的实现原理、优缺点以及目前应用情况等。研究表明,在实际的应用中,应依靠实验数据、提高硬件技术保证数据测量精度、引入电池模型、综合各种算法,扬长补短,从而提高SOC估算的精度。

Battery SOC estimation is an important part of the battery management system in electric vehicles. Since battery SOC estimation is affected by the combined effects of many factors, it is difficult to ensure the SOC estimation accuracy in practical application. Based on the synthesis of the SOC estimation method, the principle of various methods of realization, advantages and disadvantages, and the current application so on were analyzed. Through a comprehensive study of various methods, it shows that in practical applications, the estimate accuracy o! SOC can be improved by analyzing experimental data, improving the data accuracy of hardware technology, combining with battery model, and integrating various algorithms to take its advantage and removing its shortcomings.