Aluminum Vacuum Brazing Liquid Cold Plate

Our company effectively manages and coordinates the marketing channels, so as to ensure the normal sales of products, make the channel dealers at all levels achieve steady development, improve the loyalty of channel dealers and then maintain the market share of Round Aluminum Heatsink for LED, Water Cold Plate Heat Sink, Heat Sink with Copper Heat Pipe. We have always attached importance to establishing a good corporate image, actively fulfilling our social responsibility and making unremitting efforts to revitalize the industry. Our products have won praise from customers in various industries for their stable quality and high cost performance. Our company sincerely welcomes people from all walks of life at home and abroad to patronize and negotiate business. Welcome all friends to place trial order for creating a long-term business relationship.

Liquid cooling plate

Principle of liquid cooling: In a closed liquid circulation device, the liquid is flowed by the pump. During the liquid flowing on the heat source, the heat was taken by the liquid. Finally, the liquid is returned to the pump and circulate again and again.

Due to high cooling performance, the thermal conductivity is 20 times than air cooling, can solve hundreds or thousands of KW heat problems. Wildly used in Laser, Military, Medical, Power electronic, Industrial equipment and etc.

Liquid cooling plate design case

Design input

Required cooling capacity per plate: 1.6kW

Supply/Return water temperature: 8/13 deg.C

Plate surface temperature: 20 deg.C

Max. Surface temperature: 40 deg.C

Ambient temperature: 24 deg.C to 26 deg.C

Max. Size of cold plate: 940mm(L) x 145mm(W)

Maximum thickness of plate: 15mm

DN of copper tube: 9.5mm with 7.1mm I.D.

Water flow velocity: 2.5m/s (max)

Number of holes: 14 (M6 x 25mm countersunk screws as shown below in red and blue)

Heat source

Thermal Simulation

Solution: liquid cold plate

Liquid cold plate base size: 940*145*12.7mm, material: AL6061

Copper tube size: diameter 9.5mm, thickness=1.27mm, material: C1100

Simulation model (ICEPAK)

Pressure Drop: 1632Pa

Max Velocity: 1.97m/s

Heat sink Temperature

△T: 10.6044℃

Conclusion

Ta: Environment temperature

With this design, the simulation result of solution can meet your requirements.

Drawing design

Epoxy bonding

Epoxy features:

• Excellent Thermal Conductivity

• Superior Adhesion

• Low Viscosity allows quick self leveling

Process

Main points

Solution temperature:50+/5℃ Soak around 3 min

Liquid PH: 6~8

Solution pond

Soak around 3 min

Stoppers to avert chemical solution getting into the tube

Apply 70-3812 high thermal epoxy, measure the weight: after applying - before applying=0.2 +/-1g

Apply Epoxy again for better bonding result, measure by weight: after applied- before applied=1~3g fill up all cavities formed after stamping.

Auto dispenser to apply Epoxy

Fill up all cavities formed after stamping

Fly cut for better flatness

Overall surface:<0.1mm for 100x100mm area

Heat source contact surface:<0.05mm for 100x100mm area

Ultrasonic cleaning again for cosmetic purpose

IR sensor to monitor welding temperature.

Welding power: connector 1410+/- 10w

Pipe: 1200 +/- 10w

Position sensor to the welding joint

Sensor temperature:

Connector: 200~650

Pipe: 200~580

Time for the welding object to reach constant temperature: 2.5min

HF induction welding machine

Quality inspection test

Our liquid cooled plates will be inspected before delivery to customers to ensure the quality of the products. We will ensure the quality of our products through leak testing and pressure testing.

Leak testing 1：High pressure N2 to check possible leakage

Hook on USON tester

Supply N2 to USON at 150+/-1 PSI

Hold for 5min

Criterion: pressure drop <= 1%

If fails, use He tester to locate leakage points

Leak testing 2: Sort out leakage location by high sensitivity He

He tester

Supply He to tester at 25+/- 1 PSI

Criterion: leakage<9.9*10-5Mbar.I/s

Sniffer to detect

Mark leakage area in red if any

Pressure testing: Low pressure N2 to check possible leakage

Hook on USON tester

Auto detection/ judgement per requirement

Supply N2 to USON at 30+/-1 PSI

Hold for 24 hours

Criterion: pressure drop <=5%

If fails, use He tester to locate leakage point

Our advanced production equipment and strict quality assurance system provide a solid guarantee for the stable performance of our Aluminum Vacuum Brazing Liquid Cold Plate. We cultivate the staff's spirit of hard work and hope to promote the healthy, stable and sustainable development of the enterprise. We have accumulated a lot of practical experience, and the performance and effect of our products are well received by customers.