电动汽车蓄电池组工作状态检测方法

电动汽车蓄电池组的工作状态主要指各电池在工作时的端电压、工作电流和温度3个参数的变化情况。对电池工作状态的检测通常有集中式检测法和分布式检测法，而集中／分布式检测法采用“部分”集中、“整体”分布的思路，取两者之长，具有简单、可靠、性价比高的特点。同时，采用“桥电容”技术解决了蓄电池组单体端电压检测中存在的电压参考点选择和被测电池与检测设备隔离的问题，并给出了一个实用的检测方案。

Study on Operating Status Measurement of Batteries in an EV

The voltage, current and temperature of each one in a set of batteries are meaned by the operating status of batteries in an EV. There are centralized and distributed measurement ways to get them. A new way called centralized/distributed measurement is put forward in the paper, which has some advantages such as simplicity, reliableness, higher rate of performance/price and advantages of two preceding methods. And meantime, problems of reference voltage selection and isolation between a measured cell and the testing set can be solved by a bridge-capacity technology and a practical measuring plan is given.