Fuel cell stack, system, and power system with differentiated cathode flow field configuration
By adopting a differentiated cathode flow field configuration in the fuel cell stack, using bipolar plates with greater flow resistance and a reasonable flow channel design, the problem of cathode gas flow unevenness is solved and the performance and life of the stack are improved.
CN118983460BActive Publication Date: 2025-09-05XI AN JIAOTONG UNIV
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Patent Information
- Application Number
- CN202411072931.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2044-08-06
AI Technical Summary
Technical Problem
The cathode gas flow distribution in existing fuel cell stacks is uneven, resulting in reduced stack performance and shortened service life.
Method used
The fuel cell stack with a differentiated cathode flow field configuration ensures that the cathode gas flow is evenly distributed inside the stack by using the first type bipolar plate with greater flow resistance near the manifold inlet, combined with a reasonable design of the flow channel structure and manifold layout.
Benefits of technology
The output performance and service life of the fuel cell stack are improved, local hot spots and flooding are reduced, and the stability and service life of the stack are enhanced.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention discloses a fuel cell stack, system, and power system with a differentiated cathode flow field configuration. The fuel cell stack is a U-shaped flow field stack, the end plate structures are located at both ends of the stack body, and the distribution manifold inlet and the distribution manifold outlet are located at one end; the stack body includes a first type of bipolar plate battery and a second type of bipolar plate battery, the first type of bipolar plate battery is close to one end where the distribution manifold inlet and outlet are set, the cathode gas flow field flow resistance of the first type of bipolar plate used for the first type of bipolar plate battery exceeds the cathode gas flow field flow resistance of the second type of bipolar plate used for the second type of bipolar plate battery by 15% to 20%, and the anode gas flow field and the cooling liquid flow field of the first type of bipolar plate and the second type of bipolar plate are the same; the differentiated cathode flow field configuration method can reduce the cathode gas flow distributed to the battery near the inlet manifold, increase the cathode gas flow of the remaining batteries, and improve the uniformity of the cathode gas mass flow distribution in the stack.
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