With the development of electric vehicles, the power battery pack, as the core component of pure electric vehicles and hybrid vehicles, directly affects the safety of the whole vehicle. The development of battery packs needs to fully consider many factors, and the design scheme should be repeatedly verified and optimized. Therefore, the design requirements for the strength, stiffness, heat dissipation, waterproofing, and insulation of the battery box are very high, so the design and air tightness testing of the battery box are very important. This requires the use of battery pack testing equipment. The following Let's take a look at the main test methods of battery pack test equipment?

At present, the mainstream battery pack test equipment is used for air tightness detection. The main test pressures are divided into three types: positive pressure or negative pressure and flow mode. Because the material of the pack itself is thin, the pressure it can withstand is small, so under normal circumstances only It can accept the test pressure of several Kpa or tens of Kpa. At present, the mainstream method is to use the positive pressure method to test. The whole test process takes between 2 minutes or 4 minutes, depending on the size of the product and the test pressure. The test results It is also generally qualified at about 100Pa or 5ml\/min.

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