Electric quantity balancing method, battery system and storage medium

The invention discloses an electric quantity balancing method, a battery system and a nonvolatile computer readable storage medium. The electric quantity balancing method comprises the following steps: acquiring open-circuit voltage and measurement electric quantity of a plurality of battery cells of a battery system, wherein the battery cells comprise lithium iron phosphate battery cells; under the condition that the open-circuit voltage of at least one battery cell is located at the discharging tail end or the charging tail end of the open-circuit voltage-electric quantity characteristic of the battery cell, the measured electric quantity is calibrated to be the calibrated electric quantity; and balancing the battery system according to the calibration electric quantity. According to the electric quantity balancing method, under the condition that the open-circuit voltage of at least one battery cell of the battery system is located at the discharging tail end or the charging tail end, electric quantity cal