Liquid cooling system, battery cell charging and discharging protection method and health state monitoring method

The invention relates to the technical field of power batteries, and discloses a liquid cooling system, a battery cell charging and discharging protection method and a health state monitoring method.The liquid cooling system comprises a liquid cooling device, battery cells, a pressure regulator, a pressure release valve, a water tank and a water outlet pipe, and the battery cells are connected to the two sides of the liquid cooling device; the output end of the pressure regulator communicates with the input end of the pressure release valve, the first output end of the pressure release valve communicates with the first input end of the water tank, the output end of the water tank is connected with the water outlet pipe, and the water outlet pipe is connected with the liquid cooling device; the pressure regulator is used for monitoring system water pressure generated by cell expansion on the liquid cooling device; the pressure release valve is used for adjusting the water yield of the water tank flowing into t