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Cooling Channel Plates CNC Machining for Hydrogen Fuel Cells
These cooling channel plates are precision-machined thermal management parts that continuously circulate coolant through passages and remove electrochemical heat while keeping uniform temperature across the PEM fuel cell stack membrane electrode assemblies. At Zintilon, we are proud to CNC machine cooling channel plates and then use advanced milling and diffusion bonding to produce cooling plates with exceptional thermal conductivity, minimal pressure drop, and leak-proof performance to help ensure dependability in fuel cell vehicles, portable hydrogen generators, and stationary power systems.
- Machining for complex cooling geometries and serpentine channels
- Tight tolerances up to ±0.005 in
- Precision milling, bonding & leak-resistant finishing
- Support for rapid prototyping and full-scale production
- ISO 9001-certified fuel cell component manufacturing
Trusted by 15,000+ businesses
Why New Energy Companies
Choose Zintilon
Increased Productivity
Engineers get time back by not dealing with immature supply chains or lack of supply chain staffing in their company and get parts fast.
10x Tighter Tolerances
Zintilon can machine parts with tolerances as tight as+/ - 0.0001 in -10x greater precision compared to other leading services.
World Class Quality
Zintilon provides aerospace parts for leading aerospace enterprises, verified to be compliant with ISO9001 quality standard by a certified registrar. Also, our network includes AS9100 certified manufacturing partners, as needed.
From Prototyping to Mass Production
We work with Zintilon CNC Machining for cooling channel plates and other thermal management parts for hydrogen vehicle builders, fuel cell system manufacturers, and worldwide suppliers of clean energy equipment.
Prototype Cooling Channel Plates
Get highly accurate prototypes of cooling plates that match your final design closely. Check thermal performance, pressure drop, and leakage integrity before going into mass production.
Key Points:
Key Points:
- Rapid prototyping with high precision
- Tight tolerances (±0.005 in)
- Test design, heat transfer, and flow distribution early
EVT – Engineering Validation Test
Gather and revise details around prototypes of fuel cell cooling plates, focusing on thermal and hydraulic performance. Detect possible problems early on to enable a smoother full-scale transition into fuel cell manufacturing..
Key Points:
Key Points:
- Validate prototype functionality
- Rapid design iterations
- Ensure readiness for production
DVT – Design Validation Test
Assess thermal performance of cooling plates to gauge design effectiveness and adequate heat removal with varied constituent materials before mass production.
Key Points:
Key Points:
- Confirm design integrity and thermal efficiency
- Test multiple materials and channel patterns
- Ensure production-ready performance
PVT – Production Validation Test
Assess cooling channel plates' large-scale production and identify possible production issues to ensure consistency and efficiency in manufacturing.
Key Points:
Key Points:
- Test the large-scale production capability
- Detect and fix process issues early
- Ensure consistent part quality
Mass Production
High-quality cooling channel plates tested leak-proof for thermal management and delivered product on time for fuel cell and hydrogen system suppliers.
Key Points:
Key Points:
- Consistent, high-volume production
- Precision machining for thermal efficiency
- Fast turnaround with strict quality control
Simplified Sourcing for
the New Energy Industry
Our aviation industry parts manufacturing capabilities have been verified by many listed companies. We provide a variety of manufacturing processes and surface treatments for aerospace parts including titanium alloys and aluminum alloys.
Explore Other New Energy Components
Browse our complete selection of CNC machined components for new energy applications, crafted for precision and long-term reliability. From turbine housings and mounting brackets to battery enclosures and thermal management components, we deliver solutions tailored to the evolving needs of renewable energy and clean technology industries.
Hydrogen Fuel Cells Cooling Channel Plates Machining Capabilities
Hydrogen Fuel Cells Cooling Channel Plates Machining Capabilities Equipped with advanced CNC machining centers and diffusion bonding equipment, and with the skills of the fuel cell thermal machinists, we perform Cooling Channel Plates CNC Machining for Hydrogen Fuel Cells. Engineered to optimize the maximum heat transfer, minimize thermal resistance, and achieve uniform temperature distribution, focusing on the integration of assemblies of graphite composite thermal management and microchannel heat exchangers with diverse flow distribution control.
We offer thermal performance and coolant containment, flow visualization and thermal imaging validation, pressure testing, channel milling, laser welding, and diffusion bonding. Each cooling channel plate is constructed of aluminum alloys (6061-T6, 3003), stainless steel 316L, graphite composites, or titanium Grade 2 to ensure high thermal conductivity and compliance with the DOE thermal management guidelines for fuel cells (SAE J2774, ISO 23273).
We offer thermal performance and coolant containment, flow visualization and thermal imaging validation, pressure testing, channel milling, laser welding, and diffusion bonding. Each cooling channel plate is constructed of aluminum alloys (6061-T6, 3003), stainless steel 316L, graphite composites, or titanium Grade 2 to ensure high thermal conductivity and compliance with the DOE thermal management guidelines for fuel cells (SAE J2774, ISO 23273).
Aerospace
Materials & Finishes
Materials
We provide a wide range of materials, including metals, plastics, and composites.
Finishes
We offer superior surface finishes that enhance part durability and aesthetics for applications requiring smooth or textured surfaces.
Specialist Industries
You are welcome to emphasize it in the drawings or communicate with the sales.
Materials for Cooling Channel Plates
For Cooling Channel Plates Machining for Hydrogen Fuel Cells, our CNC machine shop has different options to choose from. We have over 8 thermally-conductive metals and composite materials and which help us develop rapid prototypes. We specialize in precision thermal management manufacturing, focusing on high heat transfer, corrosion resistance, and rapid prototype manufacturing, so we also develop and prototype precision corrosion-resistant thermal management manufacturing.
High machinability and ductility. Aluminum alloys have good strength-to-weight ratio, high thermal and electrical conductivity, low density and natural corrosion resistance.
Price
$ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.003 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Steel is a strong, versatile, and durable alloy of iron and carbon. Steel is strong and durable. High tensile strength, corrosion resistance heat and fire resistance, easily molded and formed. Its applications range from construction materials and structural components to automotive and aerospace components.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.001 mm (routing)
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Stainless steel alloys have high strength, ductility, wear and corrosion resistance. They can be easily welded, machined and polished. The hardness and the cost of stainless steel is higher than that of aluminum alloy.
Price
$ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Titanium is an advanced material with excellent corrosion resistance, biocompatibility, and strength-to-weight characteristics. This unique range of properties makes it an ideal choice for many of the engineering challenges faced by the medical, energy, chemical processing, and aerospace industries.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Highly resistant to seawater corrosion. The material’s mechanical properties are inferior to many other machinable metals, making it best for low-stress components produced by CNC machining.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Brass is mechanically stronger and lower-friction metal properties make CNC machining brass ideal for mechanical applications that also require corrosion resistance such as those encountered in the marine industry.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Few metals have the electric conductivity that copper has when it comes to CNC milling materials. The material’s high corrosion resistance aids in preventing rust, and its thermal conductivity features facilitate CNC machining shaping.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Due to the low mechanical strength of pure magnesium, magnesium alloys are mainly used. Magnesium alloy has low density but high strength and good rigidity. Good toughness and strong shock absorption. Low heat capacity, fast solidification speed, and good die-casting performance.
Price
$ $ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Iron is an indispensable metal in the industrial sector. Iron is alloyed with a small amount of carbon – steel, which is not easily demagnetized after magnetization and is an excellent hard magnetic material, as well as an important industrial material, and is also used as the main raw material for artificial magnetism.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Let’s Build Something Great, Together
FAQs: Cooling Channel Plates for Hydrogen Fuel Cell Applications
Cooling channel plates are thermal management components removing electrochemical heat 1 to 5 kilowatts per stack while maintaining cell operating temperature 60 to 80°C and temperature uniformity within ±5°C across membrane electrode assemblies in PEM fuel cell stacks generating 1 to 150 kilowatts. Types include aluminum serpentine channel plates with passage widths 1 to 3 millimeters achieving heat transfer coefficients 5000 to 15,000 watts per square meter-Kelvin, parallel flow designs distributing coolant uniformly across 100 to 500 square centimeter active areas, microchannel plates with channel widths 0.2 to 1 millimeters maximizing surface area, and specialty designs including dual-layer coolant plates separating hydrogen and air-side cooling, edge-cooled configurations for compact stacks, liquid-cooled bipolar plates integrating reactant distribution with thermal management, and phase-change cooling systems utilizing evaporative heat transfer.
Heat can be removed effectively, and the temperature of the coolant can be raised only about 5 to 15 degrees Celsius when using aluminum 6061-T6 and 3003, which maximizes thermal conductivity between 167 to 200 Watts/meter-Kelvin. This also lightweight the construction, which reduces the stack mass by 30%. Combined with formability for complicated channel geometries, aluminum can also resist corrosion to ethylene glycol coolant mixtures. While the thermal conductivity of stainless steel 316L is only 16 Watts/meter-Kelvin, which is adequate, it provides unmatched corrosion resistance to de-ionized water and glycol, and it can be welded to make coolant passages. Because of its electrical conductivity, graphite composite can also serve as cooling plates, providing thermal conductivity of 10 to 100 Watts/meter-Kelvin as well, and functioning as bipolar plates. Titanium Grade 2 has corrosionresistancee which is needed for high-purity coolant systems, as well as adequate corrosion resistance for aerospace applications. Titanium has adequate thermal performance.
High-speed CNC milling machines create serpentine cooling channels with a depth of 0.5 to 2 millimeters and a width of 1 to 3 millimeters, in which there is a ±0.005-inch thickness and a Ra surface finish of less than 1.6 microns with coated carbide tools. Precision face milling achieves plate surface flatness of 0.010 inches. Cover plates for hermetic passages of Coolan, which are tested to 5 bar pressure, are created by laser welding or diffusion bonding. Channels with a width of less than 1 millimeter are made by micro-machining. Coordinate drilling creates coolant inlet and outlet ports with a position accuracy of ±0.005 inches. Brazing of aluminum plates is also done. The integrity of the plates can be validated by helium leak testing of less than 1x10⁻⁶ mbar-liter per second.
We achieve ±0.005 inch in cooling channel depth for flow distribution uniformity with velocity variation of ±10 percent and channel width of ±0.008 inch for consistent pressure drop. Plate flatness must be 0.010 inch to prevent coolant bypass. Port hole positions must be ±0.005 inch for manifold sealing. Overall plate dimensions are ±0.010 inches for stack assembly with a surface finish of Ra 1.6 microns to prevent reduction of pressure.
Yes, Zintilon provides rapid prototyping for thermal management of fuel cells with computational fluid dynamics and infrared thermography testing. Zintilon also provides low-volume production for prototype vehicles and demonstration systems, where Zintilon produces 100 to 5,000 cooling plates. Zintilon provides high-volume production for commercial fuel cell vehicles, where Zintilon produces tens of thousands to hundreds of thousands of plates each year. Zintilon employs optical measurement systems for full-dimensional inspection, pressure testing to 10 bar, leak testing, flow distribution testing, and multiple thermal performance testing to determine heat transfer coefficients of 5,000 watts per square meter-Kelvin. Zintilon also provides material certification for thermal performance, coolant compatibility per ASTM D1384, and other materials.
Every piece and part is made under the guidelines of the ISO 9001 quality management system, which ensures full material traceability, inspection of dimensions against the detailed design, and compliance with fuel cell standards like the SAE J277.4, which includes thermal management systems, and ISO 23273, which is the fuel cell data exchange. Also included are the DOE technical targets, which focus on a coolant temperature rise of 20 degrees Celsius and pumping power, which is less than five percent of stack output. Lastly, compliance with the SAE J2719, which covers fuel system safety, states that temperature uniformity is within five degrees, and leak-free operation for a durable operation of 5000 hours is mandated.
Outer surfaces of the contact plates may undergo different machining and surface finishing operations. This includes precision machining, which involves removing material from channel surfaces to achieve a Ra of less than 1.6 microns to help the surfaces of the channels decrease in pressure drop and avoid particle contamination. Other operations are electropolishing and anodizing, in which stainless steel and aluminum are used. During anodizing, a layer of 10 to 25 microns is added for protection against galvanic corrosion. Other operations are nickel plating, hydrophilic coating, which improves wetting and heat transfer by 15 percent, passivation of stainless steel, and thermal interface surface preparation, in which flatness of 0.005 inches is achieved for minimal contact resistance.
For standard aluminum serpentine cooling plates made for automotive fuel cells, it usually takes 10 to 16 business days due to machining, bonding, and pressure testing. More complex microchannel designs take longer, about 8 to 14 weeks, as they include tooling development. Prototypes for cooling plates to be used for thermal testing can be done in about 8 to 12 days to allow fast CFD validation and analysis.
Yes, we design ultra-thin plates with a thickness of less than 1 millimeter to achieve a stack power density of over 4 kilowatts per liter. We design large-area plates for stationary systems with more than 1000 square centimeters of active area, high-flow designs of 5 to 15 liters per minute with less than 10 kPa pressure drop, and compact edge-cooled designs for space-constrained applications. We also design specialized gradient channel designs for optimized heat removal and flow path cooling, porous metal plates for cooling, embedded thermocouoles for temperature distribution, cooling plates, and dual-circuit designs for high and low temperature zones separation, humidification channels for conditioning reactant and heat removal.
The precision machining of cooling channel plates allows for more accurate channel configurations. Channels only vary ± 0.005 inches in depth and ± 0.008inches in width. This allows for flow distribution with a ± 10 percent variation in velocity for 10 percent cooling. Without cooling distribution, 10°C cell voltage non-uniformity hot spots accelerate membrane degradation, doubling the failure rate. A 3 to 10 L/min flow rate is maintained with cooling stack power requirements of less than 5 percent of stack output, meeting DOE requirements. Plate surface machining tolerances of ± 0.010 inches and interfacial resistance of less than 0.01°C-cm² per watt are achievable with mechanical thermal contact, thus meeting the design target of 15°C interfacial contact thermal variation. Patterned channel designs permit the range of 5,000 to 15,000 watts per square meter-Kelvin transfer for serpentine patterns while meeting the design targets of 80 to 150 watts per plate. With thermal conductivities of the design range, a 5 to 15°C increase in inlet coolants is maintained, and the cell operating temperature optimal temperature for PEM performance is 60 to 80°C. With construction that contains no leaks, ionically contaminated coolant is prevented from entering the membrane electrode assemblies. 10 ppm of coolant that passes 10 ppm of coolant membrane electrodes results in a decrease of 30 percent ionic conductivity.
With proper manufacturing, efficient thermal management can be achieved while catering to 1 to 150 kilowatt rating hydrogen fuel cells, bottoming 1 to 5 kilowatt heat with 3 to 10 liter per minute coolant flow 60 to 80°C operational temperature with ±5°C uniformity, achieving 50 to 60 percent thermal efficiency with heat recovery in fuel cell electrified vehicles, 1 to 10 kilowatt combined heat and power systems, 10 to 30 kilowatt backup power generators and material handling equipment, serving automotive, stationary power, aerospace and industrial sectors.
With proper manufacturing, efficient thermal management can be achieved while catering to 1 to 150 kilowatt rating hydrogen fuel cells, bottoming 1 to 5 kilowatt heat with 3 to 10 liter per minute coolant flow 60 to 80°C operational temperature with ±5°C uniformity, achieving 50 to 60 percent thermal efficiency with heat recovery in fuel cell electrified vehicles, 1 to 10 kilowatt combined heat and power systems, 10 to 30 kilowatt backup power generators and material handling equipment, serving automotive, stationary power, aerospace and industrial sectors.
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