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New energy automobile power lithium battery cooling method

by:dcfpower     2020-10-02

no matter what kind of power lithium battery pack pack, you occasionally see keywords resistance to high temperature and cryogenic for lithium ion battery safety efficient cannot ignore the influence of the news, etc. With lithium battery pack pack in the production of electric cars and other large and medium-sized industrial application domain expansion, heat dissipation condition also gradually highlights down, the solution of the heat pipe cooling condition is also the key to improve the performance of lithium battery pack pack. So, the new energy technology power lithium battery components configuration the cooling equipment.

automotive power lithium battery pack pack several cooling method:

the first category: heat pipe cooling

heat pipe cooling technique, the heat pipe placed on surface of lithium batteries, lithium batteries cause heat to evaporate liquid in the tube, and the other side of the heat in the heat pipe are not under cooling liquid to return to the circulation of hot end. Bring hot end of heat pipe heat cycle, and thus reduce the battery heat. Heat pipe just need is in a vacuum environment, that can reduce heat pipe in the boiling point, faster cooling rate.

the second: natural cooling

refrigeration and, of course, no additional heat transfer equipment. Byd cars, for example, in the qin dynasty, tang, song, the E6, teng heptyl select LFP lithium-ion electric vehicle operating system such as selection of natural cooling. According to investigation statistics, byd auto will be selected ternary lithium ion in the operating system into water cooling and heat pipe heat dissipation. Natural cooling and no additional heat exchange device. Such as BYD in the qin dynasty, tang, song, the E6, teng potential choose LFp batteries, such as car models above USES natural cooling. According to understand after BYD when choosing the ternary batteries, car models will switch to a surface.

the third: air-cooled

the traditional cooling technology, this technology is generally use is also very simple, is the outer material, for example, with the wind, such as liquid lithium battery pack heat pipe radiator. Air cooled gas as heat transfer material. There are two common types, the first category is now called the air-filled type commonly, external gas was immediately selection used in heat transfer. The second is are air-cooled, before entering the rechargeable battery system software can be heated and cooled. The earliest time, many Japanese and south Korean air cooling is pure electric vehicle model. Air cooled air as heat transfer medium. There are two kinds of common, the first category can call passive air cooling, direct use outside air heat exchange. The second criterion for air-cooled voluntarily, can advance to outside air for heating or cooling into the battery again after the operating system. The earliest time so many Japanese and Korean system of electric vehicle type to choose air cooling method.

4 kinds: liquid-cooled

water cooling choose automobile antifreeze ( Such as ethylene glycol) As the heat transfer material. In the way of circuit, such as heat pipe radiator with the Volt control circuit, control circuit of large central air conditioning, PTC heater control circuit, rechargeable batteries, intelligent management system according to the thermal management mode to carry out the adjustment and transformation. Liquid-cooled antifreeze ( For example, ethylene glycol) As a heat transfer medium. Methods tend to appear more channels of different heat transfer loop, such as the VOLT has radiator circuit, automotive air conditioning circuit, a pTC circuit, battery management system according to the thermal management strategy in response to adjust and switch. Liquid-cooled antifreeze ( For example, ethylene glycol) As a heat transfer medium. Methods tend to appear more channels of different heat transfer loop, such as the VOLT has radiator circuit, automotive air conditioning circuit, a pTC circuit, battery management system according to the thermal management strategy in response to adjust and switch.

5 kinds: straight cold

direct cooling medium in high performance liquid into the whole process can remove a lot of calories, and engine coolant, by contrast, the heat transfer efficiency can be improved three times or more. Direct cooling system software have closely, lighter weight, good performance, etc. Just, the system software is a double evaporator air conditioning system software, system software is not charging the battery heating, no water maintenance, condenser temperature is not easy to control, the service life of the refrigerant system software is bad. Straight cold choose refrigerants as heat transfer medium, can refrigerants in the gas phase change throughout the process of adsorption of hot, compared with coolant in thermal efficiency can promote 3 times or more, faster battery operating system internal heat. Straight cold operating system operating system closely, lighter weight and good performance advantages. But the operating system is a double evaporator operating system, operating system and no battery heating, no condensed water protection, refrigerant temperature is not easy to control and refrigerant system operation life.


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