Stamped Modular Interconnect Plate for Thin SOFC Flow Channels
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Solution Overview
Problem
Conventional methods for preparing planar interconnect plates for solid oxide fuel cells require thick plates and involve time-consuming mechanical engraving, making them costly and inefficient.
Innovation Solution
A method involving a metal blank sheet stamped to form upper and lower main channels, protrusions, and depressions, allowing for the creation of modular interconnect plates with reduced thickness and simplified production, using stamping to form fluid channels and retaining units without mechanical engraving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical engraving is used to form fluid channels on planar interconnect plates, then the fluid channels can be formed with precise geometry, but the processing time increases and production cost increases
Solution Approach 1:
The patent replaces the mechanical engraving system with a stamping system. Instead of using cutting tools to mechanically remove material and form channels, the invention uses stamped metal blank sheets with pre-formed channels and protrusions. This substitution of the forming mechanism eliminates the time-consuming engraving process while maintaining precise channel geometry through the stamped metal structure.
Solution Approach 2:
The patent applies preliminary action by pre-forming the fluid channels and structural features during the metal blank sheet stamping process, before the actual assembly. The channels are created as integral features of the stamped metal components, so the geometry is established in advance rather than being formed during the assembly process through engraving.
2Manufacturing precision
If mechanical engraving is used to form fluid channels, then the channels can be precisely formed, but the production cost increases
Solution Approach 1:
The patent replaces the expensive mechanical engraving process with a more economical stamping process. The stamped metal blank sheets are manufactured using high-volume forming techniques that are more cost-effective than precision engraving, while still achieving the required geometric precision through the stamped features and protrusions.
Solution Approach 2:
The patent merges multiple functions into the stamped metal blank sheet structure. The same stamping process that forms the fluid channels also creates the retaining protrusions, sealing surfaces, and structural features, eliminating the need for separate engraving operations for each feature and reducing overall manufacturing cost.
3Strength
If thick planar interconnect plates are used, then the structural strength is sufficient, but the production time increases and cost increases
Solution Approach 1:
The patent segments the interconnect plate structure into a thin stamped metal blank sheet with integrated three-dimensional features. Instead of using a thick solid plate, the design divides the structure into a base sheet with stamped channels and additional protrusions that provide structural reinforcement, achieving sufficient strength with reduced material thickness and faster production.
Solution Approach 2:
The patent transitions from a two-dimensional thick plate concept to a three-dimensional stamped structure. By adding vertical protrusions and complex channel geometries through stamping, the design achieves the structural strength of a thick plate while using less material and enabling faster production through high-speed stamping processes.
Data Source
AI summary
A method for preparing a modular planar interconnect plate for a solid oxide fuel cell includes the steps of: (a) providing a metal blank sheet that includes a main region and a circumferential region; (b) stamping the metal blank sheet to simultaneously form columns of upper protrusions on an upper surface of the main region, columns of lower depressions on a lower surface of the main region, and a front upper retaining protrusion unit and a rear upper retaining protrusion unit on a right side area and a left side area of the circumferential region; (c) stamping the main region to form rows of lower protrusions on the lower surface of the main region and rows of upper depressions on the upper surface of the main region; and (d) forming a pair of upper elongation plates respectively and detachably retained between the front and rear upper retaining protrusion units.