A method for equalization control of a battery pack, comprising: acquiring a voltage of each of a plurality of cells of the battery pack; on the condition that one or more of the voltages of the plurality of cells are within a preset voltage interval, selecting 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 voltages within the preset voltage interval; acquiring a target SOC of each cell based on the target SOC-OCV curve and the voltage of each cell; calculating, for each cell, a SOC difference between the target SOC of the cell and a reference SOC; calculating an equalizing time for each cell based on the SOC difference of 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; wherein the preset voltage interval comprises a first voltage subinterval and a second voltage subinterval, wherein voltage values within the first voltage subinterval are greater than or equal to an upper limit value of the hysteresis interval, and voltage values within the second voltage subinterval are less than or equal to a lower limit value of the hysteresis interval; the method being characterized in that: selecting the target State of Charge -Open Circuit Voltage curve from the charging SOC-OCV curve and the discharging SOC-OCV curve stored for the battery pack based on the voltages within the preset voltage interval comprises: on the condition that at least one of the voltages within the preset voltage interval is within the first voltage subinterval, selecting the charging SOC-OCV curve as the target SOC-OCV curve; on the condition that all of the voltages within the preset voltage interval are within the second voltage subinterval, selecting the discharging SOC-OCV curve as the target SOC-OCV curve. acquiring a voltage of each of a plurality of cells of the battery pack; on the condition that one or more of the voltages of the plurality of cells are within a preset voltage interval, selecting 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 voltages within the preset voltage interval; acquiring a target SOC of each cell based on the target SOC-OCV curve and the voltage of each cell; calculating, for each cell, a SOC difference between the target SOC of the cell and a reference SOC; calculating an equalizing time for each cell based on the SOC difference of 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; wherein the preset voltage interval comprises a first voltage subinterval and a second voltage subinterval, wherein voltage values within the first voltage subinterval are greater than or equal to an upper limit value of the hysteresis interval, and voltage values within the second voltage subinterval are less than or equal to a lower limit value of the hysteresis interval; the method being characterized in that: selecting the target State of Charge -Open Circuit Voltage curve from the charging SOC-OCV curve and the discharging SOC-OCV curve stored for the battery pack based on the voltages within the preset voltage interval comprises: on the condition that at least one of the voltages within the preset voltage interval is within the first voltage subinterval, selecting the charging SOC-OCV curve as the target SOC-OCV curve; on the condition that all of the voltages within the preset voltage interval are within the second voltage subinterval, selecting the discharging SOC-OCV curve as the target SOC-OCV curve. on the condition that at least one of the voltages within the preset voltage interval is within the first voltage subinterval, selecting the charging SOC-OCV curve as the target SOC-OCV curve; on the condition that all of the voltages within the preset voltage interval are within the second voltage subinterval, selecting the discharging SOC-OCV curve as the target SOC-OCV curve.