Battery pack and charging management method thereof

A battery pack, comprising a housing and a cell group and a control module that are disposed in the housing, wherein the cell group is configured to output a power signal and comprises a plurality of cells and the control module is configured to:

• acquire an internal resistance of each of the plurality of cells;
• acquire a terminal voltage of each of the plurality of cells in real time in a case where the plurality of cells are charged with a constant current;
• determine an electromotive force of each of the plurality of cells based on the internal resistance of each of the plurality of cells and a charging current and the terminal voltage in the case where the plurality of cells are charged with the constant current;
• determine a target cell from the plurality of cells based on the electromotive force of each of the plurality of cells;
• and
• perform charging balancing management on the target cell.