Bipolar plate-gas diffusion layer structure and fuel cell
By using a bipolar plate structure consisting of three plates and a gradient hydrophilic/hydrophobic design, the problems of gas transfer and water accumulation in fuel cells are solved, improving performance and specific power, simplifying processing and reducing costs.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
- Filing Date
- 2025-12-08
- Publication Date
- 2026-07-23
AI Technical Summary
In existing fuel cells, the reaction gas under the contact ridge between the electrode plates and the gas diffusion layer cannot be transferred quickly, and water is difficult to drain, resulting in local flooding and insufficient gas supply, which affects battery performance. Furthermore, the thickness of the bipolar plates is difficult to reduce, which limits the improvement of the specific power and volume of the fuel cell stack.
The bipolar plate structure consists of three plates, with the gas flow channel integrated within the gas diffusion layer. The protrusions are distributed at intervals on the plates. Combined with gradient hydrophilic and hydrophobic design and laser etching, a porous structure and turbulent cooling medium flow channel are formed, optimizing the flow field and cooling effect.
It significantly improves the performance and specific power of fuel cells, reduces the stack size, simplifies processing and reduces manufacturing costs, enhances gas mass transfer and cooling effects, and overcomes the problem of water accumulation under the ridge.
Smart Images
Figure CN2025140607_23072026_PF_FP_ABST