The invention provides a health degree assessment method for a power battery of an electric vehicle, and the method comprises the steps: calculating a health degree coefficient of the battery according to the operation data of the battery, the health degree coefficient comprises a first coefficient, a second coefficient and a third coefficient, the first coefficient is a battery capacity fading degree coefficient, the second coefficient is a battery temperature consistency coefficient, and the third coefficient is a battery temperature consistency coefficient; the third coefficient comprises one or more of a battery monomer voltage consistency coefficient, a monomer voltage overvoltage coefficient, a monomer voltage undervoltage coefficient, an SOC jump coefficient, a battery monomer temperature rise abnormal coefficient, a cycle index coefficient, a battery service time coefficient and a charge-discharge intensity coefficient; and determining a weight coefficient of the health degree coefficient according to the importance degree corresponding to the health degree coefficient, and performing weighted summation based on the health degree coefficient and the weight coefficient to obtain a value indicating the health degree of the battery.
本发明提供了一种用于电动车辆动力电池的健康度评估方法,包括步骤:根据电池的运行数据,计算电池的健康度系数,健康度系数包括第一系数、第二系数和第三系数,其中,第一系数为电池容量衰减度系数,第二系数为电池温度一致性系数,第三系数包括电池单体电压一致性系数、单体电压过压系数、单体电压欠压系数、SOC跳变系数、电池单体升温异常系数、循环次数系数、电池使用时间系数和充放电强度系数中的一者或多者;以及根据健康度系数对应的重要程度确定健康度系数的权重系数,基于健康度系数和权重系数加权求和,以获得指示电池的健康度的值。
Method and system for evaluating health degree of power battery of electric vehicle
一种用于电动车辆动力电池的健康度评估方法、系统
2024-07-19
Patent
Electronic Resource
Chinese
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