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Battery system cooling method analysis, natural cooling, air cooling and liquid cooling

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Battery system cooling method analysis, natural cooling, air cooling and liquid cooling

We have compiled a sample of a certain period of time in the second half of 2018. At that time, 86 of the 96 batteries were naturally cooled. As mentioned earlier, there are two ways to increase the energy density of the system: one is compact, and the other is An important way to reduce weight and compact is to lose it if you can lose it. What is natural cooling? There is nothing, regardless of air cooling, liquid cooling, leaving space to the battery, which also leads to the use of natural cooling more and more.

This was not the case in the past. In 2015 and 2016, especially in the second half of 2016, we communicated with many car manufacturers. Many of their sample designs are intended to be liquid-cooled. In passenger cars, it is basically planned to adopt liquid cooling solutions, but By the end of 2016, when the subsidy policy was introduced in 2018, this state began to change. In the first half of 2017, liquid cooling has been significantly reduced.

In recent years, the policy has promoted the development of the entire industry is very beneficial, but in the process of development, there will be some problems, and these problems will be exposed to our actual products and industries.

We have compared the state of the battery under different cooling modes: when the battery is air-cooled, the overall temperature drop of the battery is very obvious. For example, the battery will rise 15 degrees, and the temperature rises at 13 degrees after air cooling, but from the The temperature difference between the tuyere and the air outlet at different positions inside the battery pack will increase significantly, which will cause the difference of the battery cells to become larger, and the deterioration of the battery pack will be intensified, that is, if the battery air cooling design technology is not closed, the battery is If you don't understand the thermal state and the fluid mechanics of the wind tunnel, you should use natural cooling directly. Look at the liquid cooling, when the liquid cooling is arranged better, the battery cell and the overall temperature control are better.

The future development of the industry will still be market-oriented. Enterprises need to pay attention to technologies such as system integration, system thermal management, and functional safety management. This will be the core competitiveness of enterprises in the future.

Pub Time : 2019-01-08 14:48:40 >> News list
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