Why doesn't the battery pack of domestic electric vehicles need cooling?

The battery pack you see is wrapped in a big iron shell, which is cooled inside. Because of the natural cooling scheme, the process is simple, the packaging is simple and the cost is relatively low. As long as the charge and discharge rate of the whole battery pack is within the safety requirements, the heat generated by the battery pack will also be within the corresponding control range, but the alarm phenomenon caused by BMS overheating will still occur in the high temperature area in the south. 20 15.20 16 parking lot Many battery suppliers use natural cooling for batteries with relatively low capacity and need batteries with higher capacity. The thermal stability of high-capacity batteries is not as good as that of low-capacity batteries, and it needs liquid cooling and air cooling. It does not mean that battery packs such as liquid cooling and air cooling are safer. Each scheme has its advantages and disadvantages. The total temperature of liquid cooling and air cooling is lower than that of natural cooling. However, if there is liquid leakage and air cooling, the battery temperature in each area is very different. There are also quality problems and after-sales problems caused by the cooling scheme, which will be much higher than natural cooling and the cost will be much higher. In short, natural cooling is simple and low-cost.