In the application of high-power street lamps, the power input power is also large, and the temperature of the LED interface is quite high. When the street lamp continues to work for a long time, if the heat dissipation module cannot effectively dissipate heat, it will affect the service life and luminous performance of the LED. Like the current LED The serious light failure of street lamps is caused by these factors. LED street lights are used outdoors, and there are environmental and climate interference factors, so most manufacturers protect the LED street light radiator shell with anodized treatment, or spray paint to avoid the corrosion of acid and alkali substances, and the effect of anodizing treatment is not long. , it will oxidize and discolor after a long time. If you want to remove the heavy work, it will not only be time-consuming and labor-intensive, but also increase the maintenance cost; the protection cost of baking paint is low, and the protection effect is good, but the general baking paint has no heat dissipation function, and the paint itself will Forming a blocking effect is equivalent to increasing the thermal impedance of the LED street light radiator, which not only does not help, but because the heat energy is blocked in the radiator, the LED luminous power is reduced, and finally leads to serious light decay.
Suggestions for solutions to LED street light failure:
1. Internal: It is recommended that street lamp manufacturers start from basic materials and solve the problem of high-power LED heat sources from the inside out. For example, when bonding the light-emitting component to the aluminum substrate, use the right thermally conductive adhesive, the recommended soft ceramic thermally conductive adhesive. The soft ceramic thermal conductive adhesive for screen printing construction is different from the traditional bonding type thermal conductive adhesive film. The soft ceramic thermal conductive adhesive is soft and semi-liquid. When the screen printing machine blade is applied to the aluminum substrate, the thermal conductive particles will penetrate into the pores on the surface of the substrate. be filled to full. In this way, a completely flat plane without pores will be formed, which will be completely adhered to the LED epitaxial substrate. In this way, the thermal resistance is reduced to a minimum, and the heat can be quickly conducted out, which naturally reduces the ambient temperature of the LED die, prolongs the life of the epitaxy and greatly delays the occurrence of light decay. In addition, due to the ductility of the soft ceramic thermal conductive paint applied by screen printing, during high temperature baking or reflow, it will change with the thermal expansion and contraction of the aluminum substrate. The stress is very small, and the aluminum substrate will not be warped, let alone Will explode.
2. External: It is recommended to use soft ceramic heat dissipation paint for LED lamps for the external protection of LED lamps. This spray-type soft ceramic heat-dissipating paint can be directly sprayed on the exterior of LED lamps, with easy construction and operation, and can be adapted to various shapes of heat-dissipating structures, and can also be adjusted to different colors to meet the needs of landscape design. The soft ceramic particles in the spray-type heat-dissipating paint are nano-processed. The fine particles are not only easy to operate the spray gun, but also make the thermally conductive particles on the same coating area more dense and dense, so that the area where the temperature volatilizes and diffuses is also larger. Let the heat energy of the LED lamps be quickly conducted out. The soft ceramic heat-dissipating paint is a thermosetting material, which conforms to the RoHS environmental protection and safety standards. The construction procedure is simple and does not require any special equipment. After baking, it is heat-cured and can withstand the high temperature of the LED for a long time without any qualitative change. LED street lights, landscape lights, or LED advertising billboards used outdoors will also face acid and alkali damage from wind and rain, acid rain bird droppings, air dust, black smoke emissions, etc. Therefore, this spray-type soft ceramic heat dissipation paint must have the characteristics of acid and alkali resistance. The current acid and alkali resistance range is PH3~11, which can effectively protect the appearance of LED outdoor lamps from being eroded.
The cost structure of LED lamps has improved with the improvement of packaging technology, carrier board design, and heat dissipation module structure, and the quality has been continuously improved. Think, from the perspective of innovation to reduce costs, improve quality and increase profits
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