Method, apparatus, device and medium for equalization control of battery packs

An apparatus for equalization control of a battery pack, wherein the apparatus comprises:

• a voltage acquiring module, configured to acquire a voltage of each of a plurality of cells of the battery pack;
• a target curve selecting module, configured to on the condition that one or more of the voltages of the plurality of cells are within a preset voltage interval, select a target State of Charge (SOC)-Open Circuit Voltage (OCV) curve from a charging SOC-OCV curve and a discharging SOC-OCV curve stored for the battery pack based on the one or more voltages within the preset voltage interval;
• a SOC acquiring module, configured to acquire a target SOC of each cell based on the target SOC-OCV curve and the voltage of each cell;
• a SOC difference calculating module, configured to calculate, for each cell, a SOC difference between the target SOC of the cell and a reference SOC;
• an equalizing time calculating module, configured to calculate an equalizing time for each cell based on the SOC difference of each cell;
• and
• an equalization control module, configured to control equalization of each cell according to the equalizing time calculated for each cell;
• wherein the preset voltage interval is determined based on a hysteresis interval, and the hysteresis interval is an OCV interval corresponding to a section wherein the charging SOC-OCV curve is not overlapping with the discharging SOC-OCV curve.