Product Overview
Bipolar plates are precision metal parts essential for fuel cells and flow batteries, serving as critical elements for current conduction, reactant distribution, and structural support. Xinhaisen specializes in the high-volume manufacturing of custom bipolar plates using advanced etching technology, delivering parts that meet the stringent requirements of next-generation energy and industrial applications.

Manufacturing Process
Our bipolar plates are produced through a highly controlled chemical etching process, leveraging our expertise in photochemical machining. This subtractive manufacturing technique involves cleaning the metal substrate, applying a photoresist, exposing it to UV light through a precision photomask to define the flow field pattern, developing the resist, and then etching the exposed areas with specialized chemicals. This is followed by thorough cleaning, stripping of remaining resist, and final inspection. This method is ideal for creating complex, burr-free flow channel designs without inducing mechanical stress or material property changes.

Product Features

• High Precision & Complexity: Capable of producing intricate flow field patterns with fine micro-channels, featuring line widths as fine as 0.015mm and uniform tolerances within ±0.01mm.

• Burr-Free & Stress-Free: The etching process ensures smooth channel walls, zero mechanical burrs, and no residual stress, which is critical for sealing and stack integrity.

• Material Versatility: We process a wide range of conductive metals suitable for bipolar plates, including stainless steel (various grades), titanium, aluminum, and copper.

• Superior Flatness & Surface Quality: Maintains excellent flatness across the plate and consistent surface quality, promoting optimal contact and performance within the stack.

• Scalability & Speed: Our process supports rapid prototyping and cost-effective mass production, making us ideal for both R&D and large-volume orders.

• Design Flexibility: Easy to integrate complex port designs, varied channel depths, and custom features without the high cost or lead times of tooling.

Product Specifications

Product Applications

• Fuel Cells: PEM fuel cells, solid oxide fuel cells (SOFCs) for automotive, stationary power, and portable devices.

• Flow Batteries: Vanadium redox flow batteries (VRFBs) and other electrochemical energy storage systems.

• Electrolyzers: Plates for PEM and alkaline water electrolysis systems for hydrogen production.

• Heat Exchangers: Precision micro-channel plates for compact thermal management solutions.

Our Advantages

• Precision Leader: We excel at manufacturing ultra-fine, high-tolerance features crucial for efficient bipolar plate performance.

• Rapid Response & High Volume: Our integrated supply chain and optimized process ensure fast turnaround for both prototype requests and large-scale production orders.

• Unmatched Flexibility: We accommodate diverse material requests and complex, custom designs without expensive hard tooling.

• Proven Quality & Consistency: Rigorous in-process controls and final inspection guarantee each plate meets exact specifications, ensuring reliability in your final assembly.

• Extensive Experience: Deep application knowledge across energy, medical, and telecom sectors allows us to be a true technical partner.

FAQ

Q1: What is the lead time for prototype bipolar plates?
A: For standard materials and designs, prototype samples can typically be delivered within 1-2 weeks after finalizing the design and material specification.

Q2: Can you coat the bipolar plates for enhanced corrosion resistance or conductivity?
A: Yes. We offer various secondary finishing services or can collaborate with trusted partners for coatings such as gold, platinum, conductive polymer, or specialized carbon coatings.

Q3: What file format do you require for production?
A: We prefer 2D CAD files in DXF or DWG format, or detailed PDF drawings with all critical dimensions and tolerances clearly specified.

Q4: Is there a minimum order quantity (MOQ)?
A: Our etching process is highly flexible. We support low MOQs for prototyping and are optimally positioned for high-volume production runs.

Q5: How do you ensure the plates are clean and free of etching residue?
A: We employ a multi-stage ultrasonic cleaning and passivation process after etching to ensure all surfaces are completely clean, residue-free, and ready for your subsequent assembly or coating processes.

Welcome to contact us at any time!