Fuel Cell Gas Flow Path Forming Body Water Drainage
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Solution Overview
Problem
Existing fuel batteries face issues with water drainage from water guide passages, leading to overflow into gas passages, which impedes gas diffusion and reduces battery performance, especially under high load conditions.
Innovation Solution
A gas passage forming body with groove-shaped gas passages and separated water guide passages, featuring communication passages and aid portions at the water drainage ends to facilitate water bonding and drainage, reducing water accumulation in gas passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water guide passages are used to drain water from electrode reactions, then water drainage capability is improved, but water overflows into gas passages blocking them under high load conditions
Solution Approach 1:
The invention divides the water drainage function into multiple water guide passages instead of using a single passage. This segmentation allows water to be drained through multiple parallel paths, preventing any single passage from becoming overwhelmed and blocking during high load conditions when large amounts of water are generated.
Solution Approach 2:
The invention introduces communication passages that connect water guide passages to gas passages in a three-dimensional arrangement. This dimensional change allows water to be redirected from water guide passages into gas passages, creating an additional drainage dimension that prevents water accumulation and blocking in the original water guide passages.
2Reliability
If groove-shaped gas passages with staggered end portions are used, then water drainage is improved by increasing droplet surface area, but gas diffusion to electrode is impeded
Solution Approach 1:
The invention segments the water drainage function from the gas diffusion function by introducing separate water guide passages. This allows the gas passages to maintain their configuration for optimal gas diffusion while water drainage is handled by the dedicated water guide passages with their specific geometric features.
Solution Approach 2:
The invention introduces communication passages as intermediary channels that connect water guide passages to gas passages. These communication passages serve as mediators that allow water to be transferred from water guide passages into gas passages without directly obstructing the gas diffusion path, thus resolving the conflict between water drainage and gas diffusion.
3Reliability
If water guide passages are arranged adjacent to gas passages with communication passages, then water drainage is improved, but water may overflow into adjacent gas passages
Solution Approach 1:
The invention creates a dynamic water drainage system where water can flow from water guide passages into gas passages through communication passages based on water level and pressure conditions. This dynamic arrangement allows the system to adapt to varying water generation rates, directing water into gas passages when water guide passages become full, thus preventing overflow and blocking.
Solution Approach 2:
The invention changes the operational parameters of water drainage by introducing communication passages that allow water to transition between different passages based on pressure and flow conditions. This parameter-based control enables water to be redirected into gas passages when necessary, preventing water accumulation and overflow while maintaining efficient drainage under normal conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improved water drainage from water guide passages reduces water in gas passages, enhancing gas diffusion and battery performance by limiting overflow and promoting uniform electrode reactions.
Implementation Method 1
An aid portion is arranged at water drainage ends of two adjacent ones of the water guide passages. The aid portion aids bonding of water drained from the water drainage ends of the two adjacent ones of the water guide passages.
Data Source
AI summary
A gas passage forming body for a fuel battery includes gas passages and water guide passages. A communication passage is arranged between one of the water guide passages and a gas passage that is adjacent to the water guide passage and is in communication with the adjacent gas passage and water guide passage to permit water to move therethrough. An aid portion is arranged at water drainage ends of two adjacent ones of the water guide passages and aids bonding of water drained from the water drainage ends of the two adjacent ones of the water guide passages. Thus, water drainage from the water guide passages of the gas passage forming body is improved, and water in the gas passages is reduced. As a result, the battery performance of the fuel battery is improved due to an improvement in gas diffusion.