Here we talk about the sealing design of the battery pack. Here we mainly start from the requirements, especially the activity of putting the battery pack into the fish tank. The main show here is actually the ability to protect the level, Ingress ProtecTIon RaTIng, is the ability to protect liquid and solid particles. This is mainly the requirement originally in the new energy Shanghai landmark (DB31). The vehicle B-level voltage circuit should provide direct contact protection according to the provisions of Chapter 5 of GB/T 18384.3-2001, and be placed outside the passenger compartment or the luggage compartment. The protection performance of the voltage circuit should meet the requirements of IP67. This is mainly because Shanghai is raining more and there are more holes. If the water is stuck, it will be over. In fact, who is going to enter this passenger compartment, and it should be immersed in 15cm~1m. This matter, on the one hand, limits the active air cooling, on the one hand, it also has high requirements for the VenTIng design of the battery system. In fact, looking at the layout position, if the requirements of the wading test are required, the requirements placed on the chassis are high, but it is very strange under the trunk. In the coordination work of UN, it is only a high requirement for wading, and the meaning of the battery pack is not particularly large.
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