Chemical Etched Stainless Steel / Titanium Bipolar Plates for Japanese Hydrogen Fuel Cells

Product Overview

Xinhaisen is a specialist in precision etching, and our Metal Bipolar Plates are a key product in this field. These plates are essential parts in Proton-Exchange Membrane Fuel Cells (PEMFC), where they distribute fuel and oxygen evenly across the cell.Using our advanced photochemical etching technology, we manufacture high-performance plates from thin metals like 316L stainless steel and titanium. We create precise micro-channel patterns on the metal surface, ensuring maximum efficiency and power density. Whether for automotive or stationary power systems, our plates offer consistent quality and high reliability.

Manufacturing Process

Our photochemical etching process is a precise and flexible method for creating complex flow field patterns:

• Cleaning: The metal coil is thoroughly cleaned to remove any surface contaminants.

• Resist Application: A light-sensitive film (photoresist) is laminated onto both sides of the metal.

• Exposure: A photomask with the flow channel design is placed on the metal. UV light hardens the resist in the areas that should remain (the lands).

• Developing: The unhardened resist is washed away, exposing the metal where the channels will be etched.

• Etching: An etching solution is sprayed onto the metal, dissolving the exposed areas to form the channels precisely.

• Stripping: The hardened protective resist is removed, leaving a clean, burr-free bipolar plate.

This simple, tool-less process allows us to switch designs instantly and maintain extremely high precision.

Product Features & Advantages

• Ultra-High Precision: Tolerances down to ±0.05mm ensure uniform gas distribution and perfect stack assembly.

• Burr-Free Finish: The chemical process creates clean channels without burrs or mechanical stress, protecting sensitive membrane materials.

• Design Flexibility: Modify flow field patterns easily without expensive tooling changes, ideal for R&D and customization.

• Material Versatility: Capable of etching Stainless Steel (304, 316L), Titanium, and Nickel Alloys.

• Thin Material Processing: We work with metals as thin as 0.5mm, enabling lighter and more compact fuel cell stacks.

Product Specifications

Applications

Our precision metal bipolar plates are essential partts in various fuel cell applications:

• Automotive: Fuel cell electric vehicles (FCEVs), such as cars, buses, and trucks.

• Stationary Power: Backup power systems, residential cogeneration units, and distributed power generation.

• Portable Power: Small fuel cells for drones and portable generators equipment.

• Aerospace & Marine: Lightweight power solutions for UAVs and auxiliary power units on ships.

Why Choose XinHaisen for Your Bipolar Plates?

• Speed & Agility: Our digital-based etching process allows for rapid prototyping and quick turnaround times on large-scale production orders.

• Uncompromising Quality: With over a decade of experience in precision etching, we maintain strict quality control to ensure every plate meets exact specifications, contributing to the high performance and reliability of your fuel cell stack.

• Cost-Effective Precision: We provide the high accuracy typically associated with more expensive methods like laser cutting, but at a fraction of the tooling and per-part cost, especially for complex designs.

Welcome to contact us at any time.