IMMERSION-TYPE POWER BATTERY THERMAL MANAGEMENT SYSTEM

An immersion-type thermal management system for power batteries comprises a power battery unit and a thermal management unit. The power battery unit comprises a box, a battery module and a liquid cooling plate, the box is provided with an external liquid inlet and an external liquid outlet, the liquid cooling plate is provided with internal liquid outlets and located below the battery module, a liquid passage is arranged in the liquid cooling plate, an immersion space is formed in the box, the internal liquid outlets are located between and connected to the liquid passage and the immersion space, the external liquid inlet is connected to the liquid passage, and the external liquid outlet is connected to the immersion space. The thermal management unit comprises a controller and an external circulation path, and the external circulation path is connected to the external liquid inlet from the external liquid outlet and comprises an expansion box, a circulating pump, a water cooling unit, a heater and a check valve. The immersion-type thermal management system for power batteries provided by the invention has a heating mode and a cooling mode and can be easily controlled as required, and liquid can sufficiently exchange heat with the battery module, so the efficiency is high, the effect is good, and the problem of poor thermal uniformity and safety in use of power batteries is solved.