BATTERY STATE OF HEALTH DETECTION DEVICE AND METHOD

摘要

Provided is a battery state of health detection method. In the method, current and voltage are measured twice for a time interval, a corresponding model algorithm is selected according to measured current values, corresponding battery open circuit voltage values and battery state of charge values are respectively obtained at a start time and an end time of the time interval on the basis of the model algorithm, a battery capacity difference value indicating a current battery holding capacity and a battery capacity difference value indicating a future battery holding capacity are calculated and obtained, the effect of a measured battery temperature value is taken into account, and a battery state of health value is calculated and obtained. Also provided is a battery state of health detection device. The present invention implements battery state of health detection in an online state, monitors battery ageing in a timely and accurate manner, ensures that a device supplies a load with power in a normal manner, and prevents a service from being affected.