Pouch Battery Recess Structure for Fold Area Interference
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Solution Overview
Problem
Pouch type secondary batteries face issues with outward protrusion of the folding area during manufacturing, leading to interference with other components in the battery module.
Innovation Solution
The design incorporates a pouch type exterior with a recess part featuring a main recess part and a sub recess part, where the electrode assembly is accommodated, and the electrode tab is disposed within the sub recess part, minimizing outward protrusion by forming a right or obtuse angle and equal vertical heights for the recess parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the exterior is folded to accommodate the electrode assembly, then the battery structure is formed, but the folding area protrudes outward and interferes with other components in the battery module
Solution Approach 1:
The recess part is divided into a main recess part and a sub recess part. The main recess part accommodates the electrode assembly while the sub recess part receives the folding area, segmenting the space to resolve the protrusion problem
Solution Approach 2:
The sub recess part is nested within the main recess part structure, creating a multi-level configuration where the folding area is accommodated within the overall recess structure, minimizing outward protrusion
2Ease of manufacture
If the folding area protrudes outward, then the exterior can be sealed, but the protruding folding area damages the exterior and interferes with battery module components
Solution Approach 1:
The recess part is formed in advance in the exterior before the folding and sealing operations. This preliminary preparation provides a designated space for the folding area, preventing damage during subsequent sealing operations
Data Source
AI summary
Disclosed herein are a pouch type secondary battery and a method for manufacturing the same. A pouch type secondary battery may include an electrode assembly having a first width and a pouch type exterior in which a recess part configured to accommodate the electrode assembly is formed. The recess part may include a main recess part and a sub recess part. The main recess part may have a space defining a second width that is equal to or greater than the first width. The sub recess part may communicate with the main recess part and define a space having a third width less than the first width.