A battery power system includes a battery, a sensor kit, and a controller. The sensor suite comprises a current sensor, a voltage sensor and a temperature sensor. The controller is operable to determine estimated open circuit voltages of the battery at different points in time using the current signal from the current sensor and the voltage signal from the voltage sensor, and an equivalent circuit model (ECM). The controller determines a state of charge (SOC) at the ECM of the battery at different points in time via a calibrated SOC map using the open circuit voltage and temperature, and calculates a sensor gain value using the ECM-based SOC and coulomb count-based SOC (both at different points in time). When the sensor gain value exceeds a predetermined fault threshold, a control action with respect to the battery is performed, including generating a fault notification signal indicative of a fault of the current sensor.
一种电池电力系统包括电池、传感器套件和控制器。传感器套件包括电流传感器、电压传感器和温度传感器。控制器可操作以用于使用来自电流传感器的电流信号和来自电压传感器的电压信号、以及等效电路模型(ECM)来确定电池在不同时间点的估计的开路电压。控制器使用开路电压和温度经由校准的SOC映射来确定电池在不同时间点的于ECM的充电状态(SOC),并且使用基于ECM的SOC和基于库仑计数的SOC(两者都是在不同时间点)来计算传感器增益值。当传感器增益值超过预定的故障阈值时,执行关于所述电池的控制动作,包括生成指示电流传感器的故障的故障通知信号。
Current sensor fault diagnosis
电流传感器故障诊断
23.06.2023
Patent
Elektronische Ressource
Chinesisch
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