Layout of heat sink fins
The layout of heat sink fins on the New Energy Electronic Control Cover is diverse, and the most common ones are parallel arrangement, staggered arrangement, and circular arrangement. Parallel arrangement of heat sink fins has a simple structure and is easy to process. It can evenly distribute heat over a large area and is suitable for electronic control systems with relatively uniform heat distribution. Staggered arrangement of fins can increase air disturbance, destroy the thermal boundary layer, and improve heat dissipation efficiency, especially when the air flow rate is low. Circular arrangement of heat sink fins usually surrounds the heat source, such as power modules, which can make the heat dissipate more quickly from the heat core to the outside, effectively shorten the heat conduction path, and have a better heat dissipation effect for areas with local heat concentration. For example, in some electronic control systems, circular arrangement of heat sink fins is used near power transistors that generate a lot of heat, which can timely export heat and prevent local overheating.
Impact on heat conduction
The layout of heat sink fins directly affects the heat conduction process. Reasonable layout can make the heat evenly transferred from the electronic control cover to the fins, and then dissipate the heat through the contact between the fins and the air. When the contact area between the fin and the electric control cover is large enough and the contact is good, the heat can be quickly transferred from the electric control cover to the fin. For example, the inlay or welding connection method is used to reduce the contact thermal resistance and ensure efficient heat conduction. In addition, the layout of the fins should take into account the direction of the heat flow, so that the fins extend along the main direction of the heat flow to avoid detours and blockages of the heat flow. This can maximize the use of the heat dissipation area of the fins, improve the heat conduction efficiency, and allow the heat generated inside the electric control system to be quickly transferred to the fin surface, creating good conditions for subsequent heat convection heat dissipation.
Effect on heat convection
In terms of heat convection, the layout of the heat dissipation fins determines the flow characteristics of the air on its surface. The spacing, height and arrangement direction between the fins will affect the air flow rate and flow rate. Appropriate spacing can ensure that the air flows smoothly between the fins, and will not generate large air flow resistance due to too small spacing, nor will it reduce the utilization rate of the heat dissipation area of the fins due to too large spacing. Higher fins can increase the contact area with the air and improve the heat exchange efficiency, but too high may cause unstable air flow. For example, in natural convection heat dissipation, parallel fins with appropriate spacing can form a stable air rising channel, promote the rise of hot air, and replenish cold air to achieve good heat dissipation effect; in forced convection heat dissipation, according to the wind direction and wind speed of the fan, the arrangement direction and spacing of the fins are reasonably adjusted, so that the air can pass through the fin surface to the maximum extent and take away more heat.
Comprehensive heat dissipation efficiency improvement
The layout of the heat dissipation fins on the New Energy Electronic Control Cover is a design process that comprehensively considers many factors. By optimizing the layout form, improving the heat conduction efficiency and enhancing the heat convection effect, the heat dissipation efficiency can be significantly improved. This can not only ensure that the electronic control system operates within the normal operating temperature range, improve its working reliability and stability, and extend its service life, but also avoid performance degradation or even failure caused by overheating. For example, in the electronic control system of some high-performance new energy vehicles, the carefully designed and laid out heat dissipation fins can effectively dissipate a large amount of heat under complex working conditions, ensuring that the electronic control system continuously and stably provides power and control support for the vehicle, and improving the safety and durability of the vehicle.
