Bipolar plate assembly for a pem electrolyzer cell and process for making same

By sintering titanium felt and titanium mesh with the bipolar plates and designing a dual-channel structure, the problems of hydrogen embrittlement resistance, poor corrosion resistance, and assembly difficulties of the bipolar plates in PEM electrolyzers were solved, achieving efficient and low-cost electrolyzer production and sealing effects.

CN122279647APending Publication Date: 2026-06-26YOUON CHANGZHOU HYDROGEN POWER TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YOUON CHANGZHOU HYDROGEN POWER TECH CO LTD
Filing Date
2024-12-25
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing PEM electrolyzer bipolar plates suffer from problems such as poor resistance to hydrogen embrittlement, poor corrosion resistance, and poor conductivity of the cathode plate. Furthermore, positioning during assembly is difficult, and the multi-layer sealing frame leads to complex assembly, high cost, and poor sealing effect, posing a risk of hydrogen leakage.

Method used

The titanium felt and titanium mesh are sintered with the dual electrode plate as one piece, and a dual-channel structure is designed. Laser welding and single-mold double-sided vulcanization process are used to simplify the assembly process. The flow channel and sealing groove design improves airtightness and conductivity, and reduces energy consumption.

Benefits of technology

It improves the flatness and assembly quality of titanium felt/mesh surface, simplifies the assembly process, reduces the manufacturing cost and energy consumption of electrolytic cells, improves production efficiency and airtightness, and enhances sealing performance.

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Abstract

This invention relates to a bipolar plate assembly for a PEM electrolyzer and its manufacturing process. The PEM electrolyzer bipolar plate assembly includes: a bipolar plate; the bipolar plate includes a metal electrode plate and a first sealing ring; the metal electrode plate is provided with a flow channel, a first annular sealing groove, an oxygen inlet, a water inlet, and a hydrogen inlet; the first sealing ring is adapted to the shape and size of the first annular sealing groove and is integrally vulcanized with the metal electrode plate; two titanium felts and two titanium meshes; the bipolar plate, two titanium felts, and two titanium meshes are sintered into a single assembly, and the arrangement from top to bottom is: titanium felt - titanium mesh - bipolar plate - titanium mesh - titanium felt. This invention improves the flatness of the titanium felt / mesh surface and the accuracy of positioning during assembly by sintering the titanium mesh, titanium felt, and bipolar plate together, thereby improving assembly quality and production efficiency, while also reducing energy consumption during water electrolysis.
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