Pouch Cell Intermediate Assembly With Shared Gas Chamber
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Solution Overview
Problem
The existing manufacturing process of pouch-type secondary batteries is limited by material wastage and slow production speed due to the sequential performance of injection, degassing, and gas chamber cutting processes for each cell, which requires additional material for forming gas chambers.
Innovation Solution
A method for manufacturing pouch-type secondary batteries involving the formation of accommodating chambers and a gas chamber by folding cell and gas collection portions in a pouch-type case, with internal connections and a gas communication port, followed by sealing and cutting operations to create interconnected battery cells and a shared gas chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas chamber cutting process is performed for each cell sequentially, then gas chamber is formed properly, but production speed is limited and material wastage increases
Solution Approach 1:
The patent merges multiple gas chambers into a single shared gas chamber that serves multiple battery cells simultaneously. Instead of forming and cutting separate gas chambers for each cell, one gas chamber is created that accommodates gas from multiple cells, thereby eliminating repeated cutting operations and reducing material wastage while improving production efficiency
Solution Approach 2:
The shared gas chamber performs multiple functions: it serves as the gas accumulation chamber for multiple different battery cells simultaneously, replacing the need for individual dedicated gas chambers for each cell. This multi-functional design allows one gas chamber to replace multiple separate chambers, reducing overall material usage and simplifying the manufacturing process
2Reliability
If separate gas chambers are formed for each cell, then gas discharge is effective, but material wastage increases due to required material for each cell
Solution Approach 1:
Multiple separate gas chambers are merged into a single shared gas chamber that collectively serves multiple battery cells. The shared gas chamber maintains effective gas discharge functionality while using less total material than multiple separate chambers would require, as the chamber walls and sealing structures are shared across multiple cells
3Manufacturing precision
If injection, degassing, and gas chamber cutting processes are performed sequentially for each cell, then manufacturing precision is maintained, but productivity decreases
Solution Approach 1:
The patent combines the gas chamber formation process for multiple cells into a single operation. Instead of performing injection, degassing, and cutting sequentially for each individual cell, the process is streamlined by forming one shared gas chamber that serves multiple cells, thereby maintaining manufacturing precision while significantly improving production speed
Solution Approach 2:
The gas chamber is formed and configured in advance to accommodate multiple cells before the actual cell assembly and sealing processes. By preparing the shared gas chamber structure beforehand, subsequent cell assembly operations can proceed more efficiently without repeated setup and cutting operations for each cell
Data Source
AI summary
A method for manufacturing a pouch-type secondary battery according to an embodiment of the present invention may comprise: a step for preparing a pouch-type case that has two first cell accommodation parts for accommodating a first electrode assembly, two second cell accommodation parts for accommodating a second electrode assembly, and two gas collection parts for accommodating gas; an accommodation chamber-forming step for forming a first cell accommodation chamber for accommodating the first electrode assembly and a second cell accommodation chamber for accommodating the second electrode assembly, the first cell accommodation chamber being formed by folding the two first cell accommodation parts so that the first cell accommodation parts face each other, and the second cell accommodation chamber being formed by folding the two second cell accommodation parts so that the second cell accommodation parts face each other, and a gas chamber-forming step for forming a gas chamber.