The importance of thermal management to electric vehicle

      In order to operate electric vehicles with particularly high efficiency, the optimal temperature range of motors, power electronic equipment and batteries must be maintained. This requires a complex thermal management system.

      The thermal management system of traditional vehicles is mainly divided into two parts, one is the thermal management of the engine, and the other is the thermal management of the interior. New energy vehicles are nothing more than electric vehicles. We have replaced the engine with the core system of three electricity, so the thermal management of the engine is not needed.

      For new energy vehicles, especially electric vehicles, the thermal management system has three main parts: the first part is the thermal management of motor and electronic control, mainly the function of cooling; The second part is battery thermal management; The third part is the thermal management of air conditioning. The three core components of motor, electric control and battery have very high requirements for temperature control.

     Compared with internal combustion engine, electric drive has many advantages. For example, it can provide maximum torque from zero speed and can operate up to three times the nominal torque in a short time. This enables very high acceleration and makes the transmission obsolete. In addition, the motor recovers the driving energy during braking, which further improves the overall efficiency. In addition, they have a small number of vulnerable parts, so the maintenance cost is low.

      Due to the lack of waste heat, electric vehicles rely on heat management through electric heating system. For example, to make winter travel more comfortable. The fuel tank is for the internal combustion engine and the high-voltage battery is for the electric vehicle. The capacity determines the range of the vehicle. Since the energy of the heating process comes from the battery, the heating will affect the driving range of the vehicle. This requires effective thermal management of electric vehicles.

      Compared with traditional fuel vehicles, new energy vehicles increase battery thermal management. Because new energy vehicles use battery electric energy as driving energy, when the battery temperature is too high, it may bring some risks, so it is necessary to carry out battery thermal management.