How does the battery pack of new energy vehicles dissipate heat?

  New energy vehicles actually only changed the power system. The previous internal combustion engine was replaced to the current electric motor, which effectively reduced the impact of automobile exhaust emissions on air.

  Although new energy vehicles have great advantages in many aspects such as restrictions and consumption, they are facing a huge difficulty than traditional cars.

Whether it is a conventional car or a new energy vehicle, a certain amount of heat will be generated in the process of normal use. Traditional cars mainly produce heat due to the burning of gasoline. This part of the heat does not have much impact on the internal combustion engine; On the contrary, the use of new energy vehicles will generate a lot of heat, leading to the temperature rise, and the high temperature environment will increase the resistivity of the battery, reduce the use efficiency of the battery, and even explode. Therefore, there will be corresponding thermal cooling systems in new energy vehicles, which are generally divided into two parts.

Part 1: External air forced cooling mode

The first is external thermal cooling, and the external cooling uses the method of air forced cooling method. The circulation of the air around the battery through the cooling fan, so that the heat generated inside the battery is transmitted to the outside of the car through the medium of the air, so that the battery is in a lower temperature environment to ensure the service life and efficiency of the battery.

Because the air-cooled cooling will be circulated with the external air of the car, it is difficult to prevent the circuit failure due to water in rainy days. Therefore, the air-cooled system can only assist other heat dissipation methods for external heat dissipation.

Part 2: Internal heat pipe thermal cooling

The air cooling mode can only disperse the heat of the battery, and the inside of the battery needs to be dissipated in other ways. Most new energy vehicle batteries will use heat pipe cooling methods. The heat pipe is a completely sealing hollow copper pipe. It is full of special liquids with low boiling point and easy to vaporize. At the same time, the inner wall of the heat pipe is made into a capillary structure, which increases the area of the heat pipe and internal liquid contact, thereby transfer the heat much faster. When the battery is hot, the heat pipe will absorb heat and transfer the heat to the lower temperature place in the heat pipe to realize the safe transfer of heat from inside the battery to outside the battery.At the same time, because the heat pipe heat dissipation can not be affected by the seal, it can effectively avoid the influence of rain in rainy days.

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