Bipolar Plates Manufacture – High-Precision Photochemical Etching Bipolar Plates for Hydrogen Fuel Cell

Bipolar Plates Manufacture – High-Precision Photochemical Etching Bipolar Plates for Hydrogen Fuel Cell

1. Product Overview

Ourfuel cell bipolar plate is a high-precision core component for PEM fuel cell stacks and hydrogen energy electrolysis systems, manufactured by advanced stress-free photochemical etching technology. As a high-replacement upgrade for traditional fragile and heavy graphite plates, our etched metal bipolar plate adopts ultra-thin stainless steel 316L or titanium alloy substrates, featuring ultra-flat surface, zero burrs, no mechanical deformation and consistent double-sided flow field precision. With low contact resistance and superior electrochemical corrosion resistance, thishydrogen energy bipolar plate undertakes gas distribution, current conduction, heat dissipation and structural support functions. It is widely applicable for new energy vehicles, industrial hydrogen production, portable power generation and laboratory R&D testing. We provide one-stop OEM & ODM customization for flow field patterns, thickness and professional conductive surface treatment, fully meeting automotive-grade and industrial-grade procurement standards.

2. Product Specifications

2. Product Core Features & Competitive Advantages

• Zero-Stress Etching, No Deformation & No Micro-Cracks

• High-Precision Custom Flow Field, Higher Energy Conversion Efficiency

• Automotive-Grade Corrosion Resistance & Stable Conductivity

• Ultra-Thin Lightweight Structure, Optimized System Design

• High Air Tightness & Safety Stability

• Flexible R&D Prototyping & Stable Mass Production

• Cost-Effective One-Stop Solution

3. Product Specifications

• Applicable Industry: PEM Fuel Cell, Hydrogen Fuel Cell Stack, Water Electrolysis Hydrogen Production, New Energy Vehicle, Portable Hydrogen Power Equipment, Laboratory R&D

• Optional Material: 316L Stainless Steel, Pure Titanium, Titanium Alloy

• Thickness Range: 0.1mm / 0.2mm / 0.3mm / 0.5mm / 1.0mm / 2.0mm / 3.0mm (fully customizable)

• Flow Field Type: Serpentine flow field, parallel flow field, interdigitated flow field, CFD optimized special flow field

• Precision Standard: Dimensional tolerance ±0.003mm, flatness ≤0.01mm, smooth channel wall without burrs

• Surface Treatment: Electrolytic polishing, passivation, chromium nitride coating, gold plating, anti-corrosion conductive coating

• Processing Technology: Double-sided Precision Photochemical Etching

• Size & Structure: Customized according to customer drawings, samples and flow field parameters

• MOQ: Low MOQ support, prototype trial order & bulk order acceptable

• Sample Lead Time: 2-4 working days

• Mass Production Lead Time: 5-8 working days based on order quantity

4. Application Scenarios

Our etched fuel cell bipolar plate is professionally applied in the global hydrogen energy new energy industry, covering automotive fuel cell bipolar plates, commercial fuel cell stack components, industrial water electrolysis hydrogen production equipment, portable hydrogen power generation devices, unmanned equipment fuel cell systems, aerospace miniature fuel cells and university laboratory scientific research equipment.

5. Packaging Method (Standard Export Packaging)

• Inner Packaging: Each bipolar plate is individually packed with anti-static, dust-proof and moisture-proof materials. Equipped with customized soft foam isolation protection to avoid surface scratches, oxidation and extrusion deformation; all products are classified and marked with clear specification labels.

• Outer Packaging: Adopt thickened five-layer reinforced export corrugated cartons, filled with shockproof bubble cotton and fixed card slots inside, effectively resisting vibration, collision and extrusion during long-distance sea and air transportation.

• Custom Packaging: Support neutral export packaging, customer brand logo printing and customized label marking, fully compliant with international new energy equipment export standards.

• Shipping Protection: All cartons are tightly sealed with waterproof tape and attached with standard shipping marks to ensure intact and error-free global delivery.

6. Production Process

We implement strict standardized high-precision production procedures for all photochemical etched bipolar plate products to ensure ultra-high precision, stable conductivity and excellent corrosion resistance:

• Customer Flow Field Drawing & Technical Parameter Confirmation

• High-Purity Raw Material Inspection & Precision Cutting

• Surface Degreasing & Cleaning Treatment

• Photoresist Coating, Exposure & Pattern Development

• Double-Sided Synchronous Precision Chemical Etching

• Post-Etching Cleaning, Polishing & Passivation

• Custom Anti-Corrosion & Conductive Surface Treatment

• Professional Dimensional & Performance Full Inspection

• Classified Packaging & Safe Global Shipment

7. Craft Advantage Comparison

Photochemical etching has become the mainstream high-end process for metal bipolar plates, with irreplaceable advantages over traditional processes:

• Photochemical Etching Process: Zero mechanical stress, no deformation, no micro-cracks; ultra-smooth flow channel without burrs; support complex double-sided flow field one-piece molding; low contact resistance, stable performance, low prototype cost, perfect for high-precision fuel cell bipolar plate mass production and R&D testing.

• Stamping Process: Easy metal rebound and deformation, rough channel burrs, unable to process ultra-thin substrates, poor assembly flatness, easy air leakage, seriously affecting fuel cell efficiency and safety.

• CNC Machining Process: High processing cost, low efficiency, tool marks on the channel surface leading to increased contact resistance, poor consistency, not suitable for large-scale batch production.

8. Quality Control & Certifications

As core new energy precision components, all ourfuel cell bipolar plates implement full-process strict quality control to meet automotive and industrial high-standard requirements.

Authoritative Certifications: Our factory is certified by ISO 9001 Quality Management System, ISO 14001 Environmental Management System and IATF 16949 Automotive Industry Quality System, fully adapting to new energy vehicle and hydrogen energy industrial supply chain standards.

Full Inspection Standard: Raw material composition test, thickness inspection, flow channel dimensional precision test, flatness & roughness test, conductivity test, air tightness test, electrochemical corrosion resistance test and full appearance inspection to guarantee 100% qualified delivery.

9. Shipping & Trade Terms

• Available Trade Terms: EXW, FOB, CIF, CFR, DDP, DDU

• Shipping Methods: International express (DHL/UPS/FedEx/TNT), air freight, sea freight

• Main Shipping Ports: Shenzhen, Guangzhou, Shanghai, Ningbo

• Shipping Range: Global delivery covering Europe, America, Southeast Asia, Middle East and Australia

• Custom Service: Provide professional customs declaration documents and one-stop global logistics solutions

10. Frequently Asked Questions (FAQ)

• Q1: Why choose etched metal bipolar plate instead of traditional graphite plate?
  A: Etched metal bipolar plate features ultra-light weight, higher precision, better flatness and air tightness. It solves the defects of heavy weight, fragility and difficult mass production of graphite plates, and is the mainstream choice for modern automotive and commercial fuel cells.

• Q2: What surface treatment options do you provide?
  A: We support electrolytic polishing, passivation, chromium nitride coating, gold plating and customized anti-corrosion conductive coating to reduce contact resistance and extend service life.

• Q3: Can you customize exclusive flow field structure?
  A: Yes. We independently customize serpentine, parallel, interdigitated and CFD optimized special flow fields, supporting double-sided synchronous etching molding according to customer design.

• Q4: Do you support R&D prototype small batch orders?
  A: Absolutely. We provide fast prototype service with 2-4 days delivery, low MOQ, free technical guidance and drawing optimization support for laboratory research and product testing.

• Q5: What is your after-sales guarantee?
  A: We provide long-term professional after-sales service. Any quality problems caused by our production process support free replacement and full compensation.

11. Our Services & Contact Information

• Free sample testing service & custom drawing technical support

• 100% strict quality inspection before shipment

• Fast prototype & mass production delivery

• Professional one-stop OEM & ODM hydrogen energy component solution

• 24-hour online English customer service

• Contact Person: Susan Liu
  Email: susan@xinhsen.com

12. Company Introduction

For over 13 years, Xinhaisen has pioneered developments in photochemical etching, achieving industry-leading standards and winning recognition from a global customer base across various high-tech engineering markets.

Founded in 2012, we have long been committed to cooperating with customers and pioneering innovative production techniques and standardized methodologies to better meet diverse market and customized demands. These mature and optimized processing technologies have greatly upgraded our production and R&D capabilities, transforming traditional manual processing experience into standardized, systematic and scientific manufacturing systems.

To date, Xinhaisen has grown into one of China’s leading professional manufacturers specializing in photochemical etching. We also provide supporting stamping and laser-cutting services to deliver one-stop metal processing solutions. Our diversified product lineup covers fuel cell etched bipolar plates, speaker grills, precision micro meshes & filters, tea and coffee infusers, shims & gaskets, optical encoder disks & strips, EMI/RFI shielding parts, lead frames, electrical connectors & contacts, printing stencils & foils, as well as customized metal crafts.

We always take quality and service as our core mission and adhere to the highest environmental and production standards. Sustainable development is embedded in the company’s development philosophy and implemented by every employee in daily work. Our factory has obtained authoritative certifications including ISO 9001 quality management system, ISO 14001 environmental management system and IATF 16949 automotive quality management system, and we strictly maintain standardized production and quality control procedures.

Supported by rapid response efficiency, stable high quality, considerate full-process service and reasonable pricing, we have established long-term cooperative relationships and earned a high reputation with customers all over the world.