Principle of heat conduction
Heat conduction is an important part of the heat dissipation process of Liquid Cooling Battery Pack Liquid Cooling Plate. Liquid Cooling Battery Pack Liquid Cooling Plate is usually made of metal materials with good thermal conductivity, such as aluminum alloy. When the battery pack generates heat, the heat is first transferred from the battery module to the surface of Liquid Cooling Battery Pack Liquid Cooling Plate in contact with the battery through heat conduction. Inside the Liquid Cooling Battery Pack Liquid Cooling Plate, the heat is transferred along the metal lattice, diffusing from the high temperature area to the low temperature area. This process follows Fourier's law, that is, the heat flux density is proportional to the temperature gradient and is related to the thermal conductivity of the material. For example, aluminum alloy has a high thermal conductivity, which can quickly transfer the heat from the battery surface to the entire main structure of the Liquid Cooling Battery Pack Liquid Cooling Plate, so that the heat is evenly distributed in the Liquid Cooling Battery Pack Liquid Cooling Plate, creating favorable conditions for subsequent convection heat exchange.
Convective heat transfer process
Convective heat transfer occurs between the coolant inside the Liquid Cooling Battery Pack Liquid Cooling Plate and the wall of the Liquid Cooling Battery Pack Liquid Cooling Plate. The coolant flows in the flow channel of the Liquid Cooling Battery Pack Liquid Cooling Plate. When it flows through the wall with a higher temperature, the heat is transferred from the wall to the coolant. Convective heat transfer is divided into natural convection and forced convection. Forced convection is usually used in the Liquid Cooling Battery Pack Liquid Cooling Plate, and the coolant is circulated at a certain flow rate through equipment such as water pumps. According to Newton's cooling law, the amount of convective heat transfer is related to the temperature difference between the wall and the coolant and the convective heat transfer coefficient. A higher flow rate and suitable coolant properties can increase the convective heat transfer coefficient, thereby enhancing the convective heat transfer effect. For example, using a coolant with a higher specific heat capacity and thermal conductivity, and reasonably designing the shape and size of the flow channel to ensure the uniform and stable flow of the coolant can effectively improve the efficiency of heat transfer from the wall of the Liquid Cooling Battery Pack Liquid Cooling Plate to the coolant.
Synergistic mechanism
Heat conduction and convection heat transfer work together in the Liquid Cooling Battery Pack Liquid Cooling Plate. Heat conduction ensures that the heat of the battery can be efficiently transferred to various parts of the Liquid Cooling Battery Pack Liquid Cooling Plate, so that the overall temperature of the Liquid Cooling Battery Pack Liquid Cooling Plate increases, providing a temperature difference driving force for convection heat transfer. Convection heat transfer continuously takes away the heat absorbed by the Liquid Cooling Battery Pack Liquid Cooling Plate, reduces the temperature of the Liquid Cooling Battery Pack Liquid Cooling Plate, thereby maintaining the temperature gradient during heat conduction and promoting continuous heat transfer from the battery to the coolant. The two work together to form a dynamic heat transfer balance. If the heat conduction is not smooth, the local temperature of the Liquid Cooling Battery Pack Liquid Cooling Plate will be too high, affecting the convection heat transfer effect; conversely, if the convection heat transfer is insufficient, the heat will accumulate in the Liquid Cooling Battery Pack Liquid Cooling Plate, reducing the heat conduction efficiency, and ultimately affecting the heat dissipation performance of the entire liquid cooling system.
Influencing factors and optimization strategies
The heat conduction and convection heat transfer mechanism of Liquid Cooling Battery Pack Liquid Cooling Plate is affected by many factors. The thermal conductivity, thickness and contact thermal resistance of the material will affect the heat conduction; the type of coolant, flow rate, roughness and shape of the flow channel will affect the convection heat transfer. In order to optimize the heat dissipation effect, you can start from these aspects. For example, select materials with high thermal conductivity and optimize their processing technology to reduce contact thermal resistance; design a reasonable flow channel structure, such as using microchannel flow channels to increase the heat exchange area, and at the same time increase the flow rate of the coolant, but also pay attention to the pressure loss caused by excessive flow rate. By comprehensively considering these factors and optimizing them, the heat conduction and convection heat transfer efficiency of Liquid Cooling Battery Pack Liquid Cooling Plate can be improved to better meet the heat dissipation needs of liquid-cooled battery packs.
