混合动力电动车电池荷电状态描述方法

提出一种新的描述电池荷电状态的定义方法,主要针对MH/Ni动力电池,该电池通常意义下的额定容量为8?A·h,并应用在一种混合动力电动车中.混合动力电动车中动力电池的运行环境非常严酷,充放电倍率高,动态转换频繁.通常的电池荷电状态定义方法适合于稳定负载的情况下,在动态负载的情况下就会出现不适应性.原因是不能同时描述电池的静态和动态荷电状态.新定义方法提出静态荷电状态SSOC(Static State of Charge)和动态荷电状态DSOC(Dynamic State of Charge)的概念.静态荷电状态SSOC描述电池内部稳态的荷电量; 动态荷电状态DSOC描述电池充电或放电时,电池内部电荷的饱和程度.对上述定义的电化学原理进行了分析,并提出了初步的计算方法.

New definition method of state of charge for batteries in HEV

A new definition method to describe the state of the batteries in a hybrid-electric-vehicle (HEV) was proposed. The batteries in the question are MH/Ni batteries which have a normal capacity of about 8?A·h, and were used in a kind of HEV. The HEV application is a very harsh environment with high charge or discharge rates and very dynamic rate profiles. The normal definition method state of charge (SOC) that worked well in benign portable electronic applications may not work well in the HEV application. The normal definition of SOC cannot contain both the static and the dynamic message of the batteries in the only word. In the new definition method, the static state of charge (SSOC) and the dynamic state of charge (DSOC) were proposed. The SSOC indicates the static capacity message of the batteries; the DSOC indicates the dynamic state of charge while charging or discharging. The methods of how to calculate the SSOC and the DSOC were discussed.