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Fast Heat Transfer Eelectric antomobile Battery Pack cooling water cooling plate waving Ribbion

  • TR-B-230131

  • TR-B-230131

  • Trumony

Fast Heat Transfer Eelectric antomobile Battery Pack cooling water cooling plate waving Ribbion

One of the key technologies of battery-powered new energy vehicles is battery cooling, which is mainly divided into three methods: air cooling, liquid cooling and direct cooling. Among them, air cooling is widely used in electric buses, liquid cooling is more popular in passenger cars, and direct cooling has the highest technical requirements, which is the future development direction of electric vehicles.

The liquid cooling mode means that the battery uses water cooling to exchange heat. Generally, a heat exchanger is added to couple with the refrigeration cycle, and the heat of the battery is taken away through the refrigerant.

EV battery pack liquid cooling principle

The heat transfer performance of the water-cooled plate is mainly related to the convective heat transfer coefficient and the uniformity of the surface temperature of the battery. Whether the heat transfer of the water cooling plate is fast enough, whether the surface temperature is uniform, and whether there is a large local temperature difference are all indicators to judge the performance of the water-cooled plate.

How to improve the thermal conductivity of the water cooling plate?

There are usually the following solutions to improve thermal conductivity: (1) increase the contact area between the water cooling plate and the battery; (2) increase the thermal conductivity of the interface between the cold plate and the battery; (3)increase the thermal conductivity of the material of the water cooling plate (4) Adjust the flow channel design to improve the heat transfer effect of the fluid itself; (5) Different cold plate layout schemes.

As for the water cooling plate material, aluminum alloy is mainly used in the industry at present. Copper has better heat conduction effect, but the cost is much more expensive, so it is not the mainstream direction and has applications in non-battery pack fields; for improving the heat conduction efficiency of the thermal interface material, the main It is to work hard on the thermal interface material (TIM). From the previous air medium, to the later thermal conductive pad, and then to the current thermal conductive adhesive, the thermal conductivity of TIM is constantly improving. After the above two points are confirmed, the center of gravity of the cold plate design is basically concentrated on increasing the contact area between the cold plate and the battery, adjusting the flow channel design, and improving the effect of the fluid itself. You can share your specific case information and your requirement, we will raise suitable solutions or recommended improvement.

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