Fuel Cell Separator Layout for Unblocked Coolant Flow
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Solution Overview
Problem
The existing fuel cell separators face reduced cooling efficiency due to the blocking of coolant flow by merging portions in the coolant groove passages between oxidation gas passages, which hampers the effective cooling of the separator.
Innovation Solution
The separator design includes multiple gas passages with merging portions for reactant gas flow and cooling passages on a separate surface, where the cooling passages have downstream end portions connected by grooves to adjacent gas passages, ensuring uninterrupted coolant flow and enhanced cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a merging portion is provided for oxidation gas passages, then the reactant gas flow is improved, but the coolant flow is blocked in the coolant groove passage
Solution Approach 1:
The patent positions the merging portion of the gas passages on one surface of the separator while placing the coolant groove passages on the opposite surface. This spatial separation in different dimensions allows the gas passages to merge effectively for improved reactant flow while the coolant passages remain unobstructed for reliable cooling, resolving the contradiction between gas flow efficiency and coolant flow reliability
2Temperature
If cooling passages are located between adjacent gas passages, then cooling efficiency is improved, but the coolant flow path is blocked by merging portions
Solution Approach 1:
The patent segments the separator into distinct functional surfaces: one surface contains the gas passages with merging portions for optimized reactant distribution, while the opposite surface contains the coolant groove passages. This segmentation prevents the coolant flow path from being blocked by the merging portions, maintaining simple and reliable coolant flow while preserving cooling efficiency through the segmented thermal management architecture
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
This configuration maintains high cooling efficiency by allowing coolant to flow seamlessly between passages, preventing blockages and ensuring uniform coolant distribution, thus optimizing the performance of the fuel cell separator.
Implementation Method 1
Each cooling passage is located between adjacent ones of the gas passages and is configured to allow a coolant to flow through the cooling passage
Implementation Method 2
The gas passages include multiple upstream passages arranged side by side, a merging portion that is configured such that the reactant gas flowing through at least two of the upstream passages merges at the merging portion
Data Source
AI summary
A separator for a fuel cell includes multiple gas passages arranged side by side on a facing surface, and multiple cooling passages provided on a cooling surface. Each cooling passage is located between adjacent ones of the gas passages. The gas passages include multiple upstream passages arranged side by side, a merging portion, and a downstream passage that extends from the merging portion. The cooling surface includes a downstream end portion and a groove. The downstream end portion is a section in one of the cooling passages. The section is located between adjacent ones of the upstream passages and at an end portion of the cooling passage on a downstream side in a flow direction of the coolant. The groove connects the downstream end portion to another one of the cooling passages that is adjacent to the downstream end portion with one of the gas passages in between.