DISCHARGING CONTROL METHOD AND CHARGING CONTROL METHOD FOR RECHARGEABLE BATTERY, AND RECHARGEABLE BATTERY

A discharging control method and a charging control method for a rechargeable battery (100), and the rechargeable battery (100). An electric system of the rechargeable battery (100) comprises a lithium ion cell (200) and a discharging control circuit (312), and may also comprise a charging control circuit (311); a positive electrode (210) of the lithium ion cell (200) is electrically connected to a common ground end (GND) of the charging and/or discharging control circuit (311, 312), so that the common ground end (GND) serves as a positive electrode (P) of the charging input and/or discharging output of the rechargeable battery (100); a negative electrode (220) of the lithium ion cell (200) is electrically connected to an output end of the charging control circuit (311) and an input end of the discharging control circuit (312); and the input end of the charging control circuit (311) and the output end of the discharging control circuit (312) are electrically connected to a negative electrode (N) of the rechargeable battery (100). The rechargeable battery (100) discharges externally by controlling the voltage of the negative electrode (220) of the lithium ion cell (200), and charges the lithium ion cell (200) by controlling the voltage and/or current of the negative electrode (N) of the rechargeable battery (100), so that the structure of the rechargeable battery (100) is simplified, more space is left for the lithium ion cell (200), and the volumetric specific energy of the lithium ion cell (200) is improved.