The invention provides a battery current sampling safety diagnosis method and device, the method is applied to a battery management system, and the battery management system comprises a current sampling circuit and a processing module. The current sampling circuit comprises a voltage main sampling channel and a voltage auxiliary sampling channel of the shunt resistor, a first temperature signal sampling channel and a second temperature signal sampling channel, and is used for acquiring voltage sampling result values of the voltage main sampling channel and the voltage auxiliary sampling channel and carrying out first validity judgment; acquiring temperature signal sampling result values of the first temperature signal sampling channel and the second temperature signal sampling channel, performing second validity judgment, and outputting a shunt resistance voltage value and a shunt resistance temperature value; and determining the battery current value of the current diagnosis period and performing rationality judgment, and outputting the battery current value based on a rationality judgment result to perform battery algorithm application and/or battery fault judgment application, thereby improving the battery current sampling diagnosis coverage rate and the diagnosis safety level.
本申请提供了一种电池电流采样安全诊断方法及装置,所述方法应用于电池管理系统,所述电池管理系统包括电流采样电路和处理模块,电流采样电路包括分流电阻的电压主采样通道和电压辅采样通道、第一温度信号采样通道和第二温度信号采样通道,获取电压主采样通道、电压辅采样通道的电压采样结果值并进行第一有效性判断,获取第一温度信号采样通道、第二温度信号采样通道的温度信号采样结果值并进行第二有效性判断,输出分流电阻电压值、分流电阻温度值;确定本次诊断周期的电池电流值并进行合理性判断,基于合理性判断结果输出电池电流值进行电池算法应用和/或电池故障判断应用,从而提高电池电流采样诊断覆盖率和诊断安全等级。
Battery current sampling safety diagnosis method and device
一种电池电流采样安全诊断方法及装置
2024-12-27
Patent
Electronic Resource
Chinese
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