Liquid cooling solution for power lithium battery

The power battery is the power source that provides the power source for the tool, and mostly refers to the battery that provides power for electric vehicles, electric trains, electric bicycles, and golf carts.

There are many types of power batteries, which are suitable for different scenarios. Regardless of which, it will continue to generate heat under working conditions, which is a test for the cooling system. Especially with the vigorous development of electric vehicles, there are more and more batteries with long battery life and high efficiency, and heat dissipation is always a key technology. In recent years, water cooling, also known as liquid cooling technology, has begun to be introduced.

So what is power battery liquid cooling?

A typical liquid cooling system for a power battery must have the following components: water cooling block, circulating fluid, water pump, pipeline, and water tank heat exchanger. The water cooling block is a metal block made of copper or aluminum with a water channel inside, which is in contact with the battery and absorbs the heat of the battery. The circulating fluid is circulated in the pipeline by the water pump, and the circulating fluid that has absorbed the heat of the battery will flow away from the water cooling block, while the new low-temperature circulating fluid will continue to absorb the heat of the battery. The water pipe is connected to the water pump, the water cooling block and the water tank. Its function is to allow the circulating fluid to circulate in a closed channel without leakage, so that the liquid cooling system can work normally. The water tank is used to store the circulating fluid, and the heat exchanger is a device similar to a radiator. The circulating fluid transfers heat to the radiator with a large surface area, and the fan on the radiator takes away the heat flowing into the air.Also read:

The essence of liquid cooling and air cooling is the same, except that liquid cooling uses circulating liquid to transfer the heat of the battery from the water cooling block to the heat exchanger and then dissipates it, replacing the homogeneous metal or heat pipe of air cooling. The heat exchanger part is almost a replica of the air-cooled radiator. There are two biggest features of the liquid cooling system: it balances the heat of the battery and works with low noise. Due to the large specific heat capacity of water, it can absorb a large amount of heat and keep the temperature from changing significantly. The temperature of the battery in the liquid cooling system can be well controlled, and the sudden operation will not cause the internal temperature of the battery to drop sharply instantaneously. Due to the large surface area of the heat exchanger, only a low-speed fan is needed to dissipate heat to achieve a good effect. Therefore, most liquid cooling is matched with a low-speed fan. In addition, the working noise of the water pump is generally low. It will not be obvious, so the overall heat dissipation system is very quiet compared with the air cooling system.

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