Development background of water cooling plate
As the power dissipation of electronic components and equipment continues to increase, thermal analysis and thermal control are essential to ensure the thermal reliability of components and electronic equipment. Reasonable thermal design can greatly shorten the product development cycle and reduce costs.
The thermal design of electronic products can use passive techniques in the form of conduction, radiation, or natural convection, or active techniques with forced air cooling, heat exchangers, or circulating coolant. Among them, the active technology of cooling liquid circulation has the advantages of good heat dissipation effect and low cost, and is widely used in the technical field of high-power electronic products, such as svg, inverter, inverter, igbt, apf, etc. The active technology of cooling liquid circulation is to use a water cooling system for heat exchange. The water cooling system generally includes a water cooling plate, a water pump, a water tank, a heat exchanger and a fan. The heat generated is brought to a heat exchanger with a larger area through the circulation of the liquid for heat dissipation, and the cooled liquid is returned to the water-cooled plate again, and so on.
In the water-cooling system, the water-cooling plate is used as a heat-absorbing component, which is in direct contact with electronic products. Therefore, its quality directly affects the heat dissipation effect of the water-cooling system. Among them, the water-cooling plate includes a base plate and a water-cooling pipe. The base plate is provided with an installation groove, and the water-cooling pipe is disposed on the installation groove. The inlet and outlet ends of the water-cooling pipe are equipped with water-cooling joints. In order to avoid water leakage, the water-cooling joint is equipped with a sealing ring. .
Manufacturing process of water cooling plate
- Welding the water-cooled tube and the base plate: First, a mounting groove with a slot width slightly larger than the outer diameter of the water-cooled tube is machined on the base plate, then the water-cooled joint is welded to the water-cooled tube, and then the water-cooled tube is placed on the installation in the slot. Apply solder paste in the gap between the water-cooled tube and the installation groove, and fix the water-cooled tube and the substrate with a fixture, and then send the fixed water-cooled plate to the heating furnace for heating, so that the solder paste is melted and then filled in the gap, and finally cooled , Remove the clamp. This method easily leads to the failure of the sealing performance of the water-cooled joint due to the need to heat the solder paste at high temperature, the product qualification rate is low, and the cost is high , and the thermal resistance of the watercooling plate is large due to the low heat dissipation coefficient of the solder paste. , the cooling effect is not good.
- Fix the water-cooling tube on the base plate through the tube pressing process: First, machine a mounting groove on the base plate with the groove width and size that is compatible with the outer diameter of the water-cooling tube, and then place the pressing plate on the water-cooling tube. Apply pressure so that the water cooling tube fits into the mounting groove. The water-cooled plate processed by this method has the following problems: there is a gap between the water-cooled tube and the installation slot, resulting in a large thermal resistance and poor heat dissipation; the water-cooled tube is easily squeezed and deformed, resulting in the contact area between the water-cooling plate and the electronic product becomes smaller, which affects the heat dissipation effect. More importantly, if the middle of the water cooling tube is recessed, and the recess is serious, it will not be used as a heat source surface.
Water cooling board supplier recommended
There is an excellent water cooling plate manufacturer, Sanqian Technology Co., Ltd., which sells high-quality water cooling plate. If you want to know more about it, or are interested in our products, you can visit the website of Sanqian Technology Co., Ltd.
