Design of Electric Bus Power Battery Heating System

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Design of Electric Bus Power Battery Heating System 2021-12-06

According to the heat conduction method of the liquid-cooled battery box, the battery can be heated by heating the coolant, thereby increasing the temperature of the battery. Therefore, the battery heating system adopts the solution of connecting a water heating PTC electric heater in series in the battery cooling circuit. When the PTC is working, the cooling liquid flows through the PTC to be heated and then enters the water-cooling plate of the battery box, transfers the heat to the battery, and realizes the heating of the battery.

The interior of the PTC heater of the vehicle level is generally composed of a control module, a heating module, a liquid flow channel and a shell. The control module is equipped with a high-voltage electric switch circuit and a low-voltage communication control circuit, which can interact with the controller of the battery cooling system. According to the input temperature and output temperature requirements of the coolant, the PTC high voltage switch circuit is intelligently controlled to open or close to realize the start or stop of the heating module.

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