POWER BATTERY TEMPERATURE CONTROL METHOD, SYSTEM, APPARATUS AND VEHICLE

Disclosed are a power battery temperature control method, a system, an apparatus and a vehicle. The method comprises: collecting a temperature at a water outlet and/or a water inlet of a cooling plate, and collecting a temperature of a battery cell in a battery pack; in a power battery cell heating working condition, switching an electromagnetic valve to a first position and controlling the flow direction of a liquid path of a cooling liquid to be: first, two side flow channels, followed by a middle flow channel; and in a power battery cell cooling working condition, switching the electromagnetic valve to a second position and controlling the flow direction of the liquid path of the cooling liquid to be: first, the middle flow channel, followed by the two side flow channels. The present invention can dynamically control the temperature of a battery cell according to the temperatures of the water outlet and inlet of the cooling plate, and the battery cell in the battery pack, and in combination with a heating