The thermal management of electric vehicle
Traditional fuel vehicles need to cool the core components of the engine and gearbox to ensure their normal operation. Similarly, pure electric vehicles also need to be cooled when they work. Since all components of pure electric vehicles are basically in a sealed state, according to the vehicle working conditions, the cooling method is the same as that of traditional fuel vehicles, Basically, liquid cooling and air cooling are combined.
The cooling parts of pure electric vehicles are mainly concentrated on the driving motor, power battery and on-board charger. Liquid cooling is mainly used in parts with high sealing, because these need water flow to take away the heat generated inside. The battery pack has large capacity, large volume and relatively high density, The antifreeze in the whole battery board is pumped out by the water pump, and then a cycle is carried out. The method is simply to arrange the antifreeze liquid in the battery pack through the pipeline to realize the heat exchange between the battery and the liquid.
For electric vehicles, the power battery is the core, but having a good thermal cooling system is also very important for the safety of electric vehicles. Secondly, the heat dissipation of electric vehicle drive motor adopts liquid cooling. The cooling fan is equipped with water tank radiator and cooling water pump to complete the heat dissipation of motor through coolant circulation. Moreover, the insulation design is adopted in the pipeline, which is different from conventional power vehicles. Pure electric vehicles prefer electronic cooling fans in the selection of cooling fans.
Whether the battery or its driving motor will generate heat in the process of working, so the heat needs to be taken away quickly, and the most water-cooled method can only be used to achieve this effect, If the vehicle does not heat in time or there is no heat dissipation system, it will have a great impact on the safety of the vehicle. At the same time, the quality of the heat dissipation system will also affect the service life of vehicle parts.
