BATTERY PACK THERMAL MANAGEMENT SYSTEM AND THERMAL MANAGEMENT SYSTEM FOR ELECTRIC VEHICLE

This application discloses a thermal management system for a battery pack and a thermal management system for an electric vehicle. The thermal management system for the battery pack includes: a thermal management device for the battery pack, a processor, and a solenoid valve network connected to the thermal management device for the battery pack. An external port of the solenoid valve network is connected to an external cooling system. The processor is configured to control operating status of a solenoid valve in the solenoid valve network, so that the thermal management device for the battery pack heats the battery pack by using heat generated by the external cooling system. The embodiments of this application improve energy utilization.