A battery diagnostic apparatus according to the present invention comprises: a voltage sensor that generates a voltage signal indicating a battery voltage of a battery; a current sensor that generates a current signal indicative of a battery current flowing through the battery; and a control circuit. The control circuit determines a measured capacity profile over a predetermined set voltage range based on the voltage signal and the current signal collected per unit time over a constant current period over which the battery is charged or discharged at a predetermined current rate over the entire set voltage range. The control circuit determines a measured differential curve within the set voltage range based on the measured capacity curve. The control circuit compares the measured differential curve to a reference differential curve to determine whether the negative electrode curvature of the battery abnormally increases.
根据本发明的电池诊断设备包括:电压传感器,所述电压传感器生成指示电池的电池电压的电压信号;电流传感器,所述电流传感器生成指示流过电池的电池电流的电流信号;以及控制电路。控制电路基于在恒定电流时段内每个单位时间收集的电压信号和电流信号确定在预定的设定电压范围内的测量容量曲线,在所述恒定电流时段内,在整个设定电压范围内以预定的电流速率对电池进行充电或放电。控制电路基于测量容量曲线确定设定电压范围内的测量微分曲线。控制电路将测量微分曲线与参考微分曲线进行比较以确定电池的负极弯曲度是否异常增加。
Battery diagnostic device, battery diagnostic method, battery pack, and electric vehicle
电池诊断装置、电池诊断方法、电池组和电动车辆
2023-04-07
Patent
Electronic Resource
Chinese
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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