Method and system for detecting resistance of internal short circuit of battery

A system for detecting resistance of an internal short circuit of a battery, comprising:

• a battery set, comprising a battery;
• a data acquisition module, configured to measure charging/discharging information of the battery, wherein the charging/discharging information comprises voltage information, current information, time information or battery temperature information;
• a characteristic calculating module, configured to calculate a charging/discharging characteristic of the battery according to the charging/discharging information, align the calculating a 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, wherein the charging/discharging characteristic comprises a relationship between battery capacity information of the battery and the voltage information of the battery;
• and
• an internal short-circuit resistance calculating module, configured to calculate aligned charging/discharging information according to the aligned charging/discharging characteristic and calculate the resistance of the internal short circuit of the battery according to the aligned charging/discharging information when the battery is determined as abnormal, wherein the aligned charging/discharging information comprises aligned voltage information, aligned current information, aligned battery capacity information or aligned time information.