High-power LEDs are sensitive components. Heat dissipation and reliability are the main factors affecting the application of high-power LEDs. So how to solve the heat dissipation problem of high-power LED light sources? Vansim provides you with practical solutions and manufacturing.

LED Thermal Management

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LED Heat Dissipation
Due to the limitation of semiconductor light-emitting diode chip technology, the photoelectric conversion efficiency of LED needs to be improved, especially for high-power LED lamp beads. Because of their high power, more than 60% of the electrical energy will be converted into heat energy (with the development of semiconductor technology, the photoelectric conversion efficiency will gradually increase). This requires end customers to do a good job of heat dissipation when using high-power LED products to ensure the normal operation of high-power LED lamp beads.

How to choose the right cooling method for LED?

1. Applications with high radiant power: If the device has high requirements for radiant power per unit area and needs to cover a large area, water cooling is recommended. Water cooling can more effectively maintain the temperature stability of the device and ensure that it is not affected by heat during long-term use.

2. Medium and low power devices: For devices with low power requirements, air cooling or water cooling can be selected according to actual conditions. If the radiant area is large but the power is not high, air cooling may be more economical and applicable.

3. Hybrid cooling for high power devices: In some cases, especially for devices with high power, water cooling and air cooling can be combined to ensure that the device still maintains good temperature control during high-intensity work.

 

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What can Vansim do for your LED cooling system?

Please contact our technical team to serve you!

Choosing the right heat dissipation method depends on the power, working area and use environment of the equipment.

Correct heat dissipation design can not only increase the service life of the equipment, but also ensure production efficiency.

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The impact of heat management on LED life
The high luminous efficiency and high power density of LED make its heat dissipation very important. When the temperature of LED chip increases, the luminous efficiency and reliability will decrease. Statistics show that for every 2℃ increase in component temperature, the reliability decreases by 10%. Therefore, effective heat management is the key to ensure the long-term stable operation of LED lamps.

Excessive temperature will not only shorten the life of LED, but also reduce its light efficiency. Therefore, effective heat dissipation design is essential to ensure the reliability and performance of LED modules.

What are the factors that affect the junction temperature of LED lamps?

In summary, they are: the shape of the heat sink, the thermal conductivity of the heat sink material, the radiation efficiency of the surface material to the air, the heat dissipation area, etc.

In addition, the packaging of the aluminum substrate and the heat sink, the power of the LED lamp and the ambient temperature also affect the junction temperature of the LED.

Therefore, in order to improve the heat dissipation effect of the heat sink, it can be achieved by increasing the thermal conductivity of the heat sink material, increasing the radiation effect of the heat sink surface material, increasing the surface area of ​​the heat sink or improving the packaging of the aluminum substrate and the heat sink.

What are the methods of LED heat dissipation during the use of LEDs?？

There are two main heat dissipation methods: passive heat dissipation and active heat dissipation.

Passive heat dissipation refers to the installation of a heat sink on the LED, and does not require a heat dissipation fan.

For LED lamps, if the power of the lamp is small, the heat dissipation requirement can be met by natural convection; if the lamp uses a single high-power LED, as long as the lamp selects a suitable packaging structure and designs a suitable heat sink structure, the heat dissipation effect can also be achieved by natural convection.

Active heat dissipation High-power LED lighting sources often use active heat dissipation, such as street lamps.

Active heat dissipation methods also include water cooling technology, microchannel radiators and other means, which can be combined with different working environments to choose the appropriate heat dissipation method. In the research and development of products such as machine vision and semiconductor equipment, 3D imaging and printing, solar energy and photovoltaic power generation, life sciences and medical products, we often need some more precise LED light sources. At present, the market mainly has a simple shape combination of LED + light guide plate, which can be used in the past era. In the AI ​​era, light sources that reach the optical precision level can meet your needs.

Application scenarios of water-cooled UVLED surface light sources
1. Electronics industry: In the production process of electronic components, water-cooled UVLED surface light sources are widely used for rapid curing of circuit boards, electronic packaging, etc., providing efficient and stable light output to ensure high quality and consistency of products.
2. Fiber optic communication: Precise light curing is required in the manufacturing process of fiber optic communication equipment. Water-cooled UVLED surface light sources can provide stable ultraviolet light output to ensure the accuracy and reliability of fiber optic connections.
3. Printing and packaging: Water-cooled UVLED surface light sources can quickly cure various inks and coatings, and are widely used in the printing and packaging industry, especially for the curing of large-area printed products.
4. Automobile manufacturing: In the automobile manufacturing industry, water-cooled UVLED surface light sources are used for light curing of body coatings and interior parts. Its efficient heat dissipation and uniform light output ensure the durability and aesthetics of the product.
5. Medical equipment: The production of medical equipment has extremely high requirements for curing technology. Water-cooled UVLED surface light sources are widely used in the manufacture of various medical devices due to their excellent performance.
With the widespread application of light curing technology, the demand for UVLED light source equipment in various industries is increasing day by day.
At present, most LEDUV curing machines use water cooling to dissipate heat. Through the cold water circulation inside the chiller, the temperature inside the lamp head is effectively reduced to ensure stable operation of the equipment.
However, with the increase in power, the heat dissipation problem of the light source has gradually become a key factor affecting the performance of the equipment. The water-cooled UVLED surface light source greatly improves the heat dissipation capacity of the equipment by introducing an efficient water cooling system, thereby ensuring stable light output during long-term work.
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More varieties Thermal Products:

 
Technical features of liquid cooling UVLED surface light source
1. Efficient water-cooling heat dissipation system: The water-cooled UVLED surface light source adopts water cooling technology. Compared with the traditional air cooling method, the water cooling system can more effectively reduce the temperature of the light source and avoid light attenuation and shortened equipment life caused by overheating.
2. Uniform light output: The design of the surface light source enables it to cover a larger working area. With the water-cooling heat dissipation system, the light source can maintain uniform and stable light output, ensuring uniform curing effect of various materials.
3. Applicable to multiple wavelengths: The water-cooled UVLED surface light source provides a variety of wavelength options, and users can customize it according to the curing requirements of different materials.
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