Cell system and cell charging-discharging management method

The invention provides a cell system. The cell system comprises a battery unit and a control unit electrically connected with the battery unit; the battery unit comprises a battery composed of at least two tandem cells, a primary inductance coil and at least two secondary inductance coils which are close to the primary inductance coil, the primary inductance coil is in series connection with the battery, the control unit controls the access circuit of the primary inductance coil, each of the secondary inductance coils is in series connection with one cell, the control unit controls the access circuit of the secondary inductance coil, and when the voltage of a certain cell is higher than or lower than a preset threshold, the control unit controls the access circuit of the secondary inductance coil which is in series connection with the cell and controls access of the access circuit of the secondary inductance coil. The cell system provided in the invention enables all the cells to maintain balanced when a voltage is too low, which allows energy of the cell system to be fully utilized during the processes of charging and discharging, thereby obtaining high energy utilization efficiency. The invention also provides a cell charging-discharging management method.