Method and system for determining discharging process of battery

A system for determining a discharging process of a battery, comprising:

• a battery set, comprising a battery;
• a data acquisition module, configured to measure charging/discharging information of the battery;
• a characteristic calculating module, configured to calculate a charging/discharging characteristic of the battery according to the charging/discharging information, align the charging/discharging characteristic of the battery according to a comparison characteristic point of a comparison characteristic to obtain an aligned charging/discharging characteristic, and determine whether the battery is normal according to the aligned charging/discharging characteristic or a coulombic efficiency of the battery;
• and
• a safety probability calculating module, configured to calculate a safety probability of the battery according to the aligned charging/discharging characteristic and resistance of an internal short circuit of the battery, and determine the discharging process of the battery according to the safety probability.

A method for determining a discharging process of a battery, comprising:

• determining that the battery is abnormal;
• determining a safety determination range according to a battery capacity versus resistance relationship or a differential capacity versus resistance relationship, and calculating a safety probability of the battery according to danger levels and a quantity of events in the safety determination range;
• and
• determining the discharging process of the battery according to the safety probability of the battery.