Battery parameter calculation method, device and system

The invention discloses a battery parameter calculation method, device and system. The method comprises the following steps: acquiring a current measurement value of a current battery; acquiring a current voltage measurement value of the battery; calculating a model-based open circuit voltage based on the current measurement, the voltage measurement, and a battery model including a battery resistance component and a battery voltage component for characterizing a relationship between the current measurement, the voltage measurement, and the model-based open circuit voltage; calculating the current charge state based on the voltage; receiving a previous charge state; calculating the current charge state based on coulomb counting; and calculating the current state of charge. 一种电池参数计算方法、装置以及系统，所述方法包括：获取当前的电池的电流测量值；获取当前的电池的电压测量值；基于电流测量值、电压测量值和电池模型计算基于模型的开路电压，其中，电池模型包括电池电阻分量和电池电压分量，用于表征电流测量值、电压测量值与基于模型的开路电压之间的关系；计算当前的基于电压的荷电状态；接收前一次的荷电状态；计算当前的基于库伦计数的荷电状态；以及计算当前的荷电状态。