Bitmain S17 Aluminum Vacuum Brazed Liquid Cold Plates

Our company always puts the concept of quality first in the top priority. Our responsibility is to provide High Quality Cooling Heat Sink, Liquid Cold Plate for Power Supply, Liquid Cold Plate with stable quality, high cost performance and market competitiveness. All of our employees will welcome visitors from home and abroad with a dedicated service attitude and fast service methods, and guide customers to success! We have made remarkable achievements in terms of industrial scale, service scope, product technology content and technological innovation. We consciously fulfill our corporate social responsibility, actively create social wealth, sincerely give back to society, and promote social harmony and stability. We establish and continuously improve the human resource management system that matches the development strategy of the company and suits the characteristics of the company.

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

We are a campany making Bitmain S17 Aluminum Vacuum Brazed Liquid Cold Plates which has been developing very fast in recent years. The company is trying to create a first-class brand and set up a good image of honesty , pro-viding good services for all the comsumers both at home and abroad. We carry out modern enterprise management, seize the market, constantly develop new products, and constantly carry out technological transformation. We warmly welcome you to join us. Our company is constantly accumulating experience, innovating and enterprising, constantly improving technology, and constantly improving product quality.