镍氢动力电池SOC估算方法

SOC（State of Charge，电池充电状态）估算是电动汽车电池管理系统的重要功能，准确有效的SOC估算对推动电动汽车核心技术的发展具有重要意义。文章介绍了镍氢电池工作的基本原理及电池管理系统的基本结构等方面技术，阐述了在对电动汽车SOC进行估算的8种方法，并比较各方法在应用中存在的优缺点，指出Ah计量法是目前最常用的方法，且常与其他方法组合使用。

State of Charge Estimation Method of Nickel-Hydrogen Battery

SOC estimation was an important function of the electric vehicle battery management system. The accurate and effective SOC estimation has great significance in promoting the development of electric vehicles＇ core technology. The basic principle of the nickel-hydrogen battery, the basic structure of battery management system is introduced in this paper. Eight estimation methods of SOC are described. The advantages and disadvantages of these methods during applications were compared. It is indicated that Ah metering method is the most commonly used, and it is often used with other methods.