Charging and discharging protection circuit, battery system and robot

The utility model discloses a charge-discharge protection circuit, a battery system and a robot, the charge-discharge protection circuit comprises an MOS tube and a control circuit, the drain electrode and the source electrode of the MOS tube are respectively connected with a power adapter and a battery, the control circuit is connected with the grid electrode of the MOS tube and the power adapter, and the power adapter is connected with the battery. And the control circuit controls the MOS tube to be conducted under the control of a control signal generated by the power adapter. According to the charging and discharging protection circuit, the battery system and the robot provided by the utility model, damage to equipment such as a circuit board and a battery caused by reverse connection of a power supply can be prevented through the charging and discharging protection circuit; the problems that the voltage of the power adapter is inconsistent with the voltage of the battery, the battery cannot be fully char