Custom Micro-Etched Thin Metal Bipolar Plates for Automotive, Aerospace & Energy Systems

Custom Micro-Etched Thin Metal Bipolar Plates for Automotive, Aerospace & Energy Systems

Product Overview

Bipolar plates are critical parts in fuel cells and electrolyzers. They serve to distribute fuel and oxygen, conduct electricity, and remove reaction products. At Xinhaisen Technology, we utilize advanced chemical etching to produce high-precision bipolar plates that offer superior flatness, intricate flow field designs, and consistent performance for the renewable energy and automotive sectors.

What is Chemical Etching?

Chemical etching (also known as photochemical machining or chemical milling) is a subtractive manufacturing process. It uses corrosive chemicals to dissolve metal through precisely controlled masks. Unlike traditional stamping or machining, etching:

• Does not use mechanical force, eliminating burrs and stress.

• Does not involve heat, preserving the metal’s original properties.

• Allows for rapid prototyping and complex geometries without the cost of hard tooling.

Product Features

• Ultra-High Precision: Achieve intricate flow channel patterns with tight tolerances to optimize gas/liquid distribution.

• Burr-Free & Stress-Free: No mechanical deformation or heat-affected zones, ensuring perfect flatness for sealing.

• Thin Material Capability: Expertly processes materials from 0.5mm to 3.0mm thickness, ideal for lightweight and compact stack designs.

• Complex Geometries: Capable of producing fine channels, micro-holes (down to 0.03mm), and narrow line widths (down to 0.015mm).

• Material Versatility: Compatible with stainless steel (304, 316L), titanium, and other corrosion-resistant alloys required for harsh electrochemical environments.

• Cost-Effective for Scaling: Easily transitions from prototype to mass production with consistent repeatability.

Product Specifications

Applications

Bipolar plates manufactured by Xinhaisen are widely used in:

• Fuel Cells: Hydrogen fuel cell stacks for automotive (EVs) and stationary power.

• Electrolyzers: PEM electrolyzers for green hydrogen production.

• Battery Systems: Cooling plates for thermal management in EV batteries.

• Micro-Reactors: Chemical synthesis and heat exchange equipment.

Our Advantages

• Rapid Turnaround: Quick sampling and prototype delivery to accelerate your R&D cycle.

• High Consistency: Advanced etching lines ensure uniform quality for large-volume orders.

• No Tooling Costs: Our digital process eliminates the need for expensive molds, allowing for easy design modifications.

• Complexity Without Limits: Unlike stamping, etching has no wear on tools, allowing for extremely fine and complex flow channel designs.

Frequently Asked Questions (FAQ)

• Q: What thickness of metal can you etch for bipolar plates?
  A: We can etch metals ranging from 0.5mm to 3.0mm. For fuel cell applications, we specialize in thin gauges that help reduce the overall stack weight.
• Q: Can you handle custom flow field designs?
  A: Yes. Since we use digital tooling (photo tools), we can accommodate any custom flow field pattern you require. Design modifications are simple and cost-effective, even after production has started.
• Q: What is the minimum line width you can achieve for flow channels?
  A: We can achieve line widths as fine as 0.015mm (15 microns) , allowing for highly efficient reaction surfaces in compact spaces.
• Q: How does etching compare to stamping for bipolar plates?
  A: Etching offers stress-free, burr-free results with no tool wear. While stamping is fast for simple, high-volume parts, etching is superior for complex patterns, high precision, and thin materials where flatness is critical.
• Q: Do you offer prototypes before mass production?
  A: Absolutely. We support low-volume prototyping to validate your design before moving to full-scale mass production, ensuring your final product meets all performance standards.

Welcome to contact us at any time!