Chemical Etching Bipolar Plates for Fuel Cell with High Corrosion Resistance

Bipolar Plates Overview

Xinhaisen Technology specializes in manufacturing high-performance chemically etched bipolar plates for fuel cells, flow batteries, and other electrochemical applications. Our precision etching process enables complex flow field patterns with exceptional dimensional accuracy and surface quality.

Bipolar Plates Features

• Complex, Burr-Free Channels: Creates intricate, multi-depth flow field designs with smooth, burr-free surfaces for optimal gas flow and water management.

• High Precision & Consistency: Excellent uniformity across the entire plate and from plate to plate (±0.03mm), ensuring consistent fuel cell stack performance.

• Material Versatility: Can process various corrosion-resistant conductive metals, including 316L stainless steel, titanium, and aluminum.

• Thin & Lightweight: Capable of producing very thin plates (from 0.05mm), contributing to higher power density stacks.

• Rapid Prototyping & Scale-Up: No hard tooling required for design iterations, enabling fast development cycles and seamless transition to volume production.

Bipolar Plates Specifications

Bipolar Plate Applications
Metallic bipolar plates are primarily used in:

1. Proton Exchange Membrane Fuel Cells (PEMFCs)

2. Hydrogen Fuel Cell Stacks for:

   • Automotive & Transportation (FCEVs, buses, trucks)

   • Stationary Power Backup & Generation

   • Portable & Remote Power Systems

   • Material Handling Equipment (e.g., forklifts)

3. Other Energy Conversion Devices requiring precision fluidic plates.

Performance Advantages

• Optimized Fluid Dynamics: Precision-etched flow fields reduce pressure drop
• Enhanced Contact: Uniform surface for better current collection
• Thermal Management: Integrated cooling channel designs available
• Weight Reduction: Thin yet rigid constructions
• Sealing Compatibility: Flat surfaces for reliable gasket performance

Quality Assurance

• Material certification (ASTM/EN standards)
• 100% dimensional inspection
• Leak testing (helium or pressure decay methods)
• Surface roughness measurement
• Electrical conductivity testing
• ISO 9001:2015 certified production

FAQ

• Q1: Can you etch titanium bipolar plates?
  Yes, we etch titanium, stainless steel 316L, and nickel alloys commonly used in fuel cells.
• Q2: What is the minimum channel width you can achieve?
  We can achieve channel widths down to 0.03mm and line widths as fine as 0.015mm.
• Q3: Is etching better than stamping for bipolar plates?
  Etching produces burr-free, stress-free plates without tooling costs, ideal for complex flow fields and rapid design changes.Stamping may be cheaper only for very simple, high-volume designs.
• Q4: Do you provide surface coating?
  We focus on etching. Coating can be arranged with our partners upon request.
• Q5: What is your typical lead time for prototypes?
  Typically 5–7 days for samples, depending on design complexity and material.
• Q6: Do you accept custom flow field designs?
  Absolutely. We work from your CAD files to produce any custom pattern.

Welcome to contact us at any time!