Half-cell Composite for Electrochemical Cells
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Solution Overview
Problem
Existing electrochemical cell stacks face challenges in achieving simultaneous and defined contact force in sealing and active areas, leading to increased contact resistances, reduced efficiency, and difficulty in scalable, automated manufacturing due to complex designs and pressure/temperature fluctuations.
Innovation Solution
A composite structure comprising expanded metal or perforated sheets without edge regions, force distribution plates with infiltrated sealing elements, and gas diffusion layers, bonded together to form a material-bonded assembly, ensuring uniform load distribution and sealing without edge seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex multi-component cell structure with separate sealing elements and stacking elements is used, then sealing function is achieved, but device complexity increases and automated manufacturing becomes difficult
Solution Approach 1:
The patent combines multiple separate components (sealing element, stacking element, and cell components) into a single integrated half-cell composite. The sealing element is bonded directly to the stacking element, eliminating the need for separate assembly steps and reducing the number of parts. This integration maintains the sealing function while significantly reducing device complexity and enabling automated manufacturing.
Solution Approach 2:
The integrated half-cell composite performs multiple functions simultaneously: the sealing element provides both sealing and structural support, while the bonding to the stacking element combines sealing, mechanical fastening, and electrical connection functions. This multi-functionality reduces the number of separate components needed while maintaining reliable sealing.
2Ease of operation
If manual assembly processes are used for complex cell stacks, then assembly flexibility is maintained, but productivity decreases and manufacturing costs increase
Solution Approach 1:
By integrating multiple components into a single half-cell composite unit, the patent enables automated handling and assembly processes. The unified structure can be manufactured using automated bonding processes and then stacked automatically, dramatically increasing productivity while reducing manufacturing costs compared to manual assembly of separate components.
3Adaptability or versatility
If pressure differences and temperature fluctuations occur during operation, then electrochemical cell operation is enabled, but contact resistances increase and sealing effect decreases
Solution Approach 1:
The sealing element is pre-compressed during assembly to establish optimal contact pressure between components. This preliminary compression ensures that during operation, even when pressure differences and temperature fluctuations occur, the sealing element maintains sufficient contact pressure to prevent increases in contact resistance and maintain sealing effectiveness throughout the component's service life.
4Reliability
If edge seals are used in cell design, then sealing is achieved, but component complexity and manufacturing difficulty increase
Solution Approach 1:
The patent integrates the sealing element directly with the stacking element through bonding, creating a unified component that eliminates the need for separate edge seal assemblies. This integration maintains effective sealing while dramatically simplifying the manufacturing process and enabling scalable automated production, as the bonded composite can be manufactured in large quantities using automated bonding processes.
Data Source
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AI summary
A half-cell module (HZV) comprising, preferably consisting of: a) metal mesh or a perforated sheet without edge region, b) a force-distribution plate with infiltrated sealing element, and c) a gas diffusion layer element, wherein a), b) and c) are in the form of an integrally bonded composite.