Battery Cell Insulating Member Layout for Sealing Cut Surface Isolation
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Solution Overview
Problem
Conventional battery cells suffer from deteriorated insulation performance due to exposure of the second cut surface, which compromises the electrical insulation between the battery cell and the module frame.
Innovation Solution
A battery cell design that includes a bent first sealing part and a shaped insulating member covering both sealing parts and cut surfaces, with a side surface portion covering the second cut surface to enhance insulation, and a method for manufacturing this design involving sequential attachment of insulating member portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insulating member covers only the first cut surface, then the manufacturing process is simple, but the second cut surface is exposed causing deteriorated insulation performance
Solution Approach 1:
The insulating member is divided into a main body portion and a protruding portion that separately cover the first and second cut surfaces. This segmentation allows each portion to be optimized for its specific function while maintaining overall insulation performance without requiring a completely redesigned complex structure
Solution Approach 2:
The insulating member extends in multiple spatial dimensions with the protruding portion extending from the main body to cover the second cut surface. This dimensional extension ensures complete coverage of all exposed cut surfaces without adding separate components, resolving the contradiction between coverage completeness and structural simplicity
2Reliability
If the insulating member is designed to cover both sealing parts and cut surfaces, then insulation performance is improved, but the manufacturing complexity increases
Solution Approach 1:
The insulating member integrates multiple functions into a single component: the main body portion covers the first sealing part and first cut surface, while the protruding portion covers the second sealing part and second cut surface. This merging eliminates the need for separate insulating components, improving electrical insulation without significantly increasing manufacturing complexity
Solution Approach 2:
The insulating member serves multiple functions simultaneously: it provides electrical insulation for both sealing parts and both cut surfaces, and structurally supports the electrode leads. This multi-functionality ensures comprehensive insulation coverage while maintaining ease of manufacture by using a single versatile component
Data Source
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AI summary
[Summary] The present disclosure relates to a battery cell for securing an insulation performance and a battery module comprising the same. The battery cell of the present disclosure comprises: a case accommodating an electrode assembly; an electrode lead formed to protrude from the case at front and rear ends of the case; a first sealing part formed at both side ends of the case; a second sealing part connecting the first sealing part at a portion in which the electrode lead is formed; a first cut surface formed by cutting the first sealing part; a second cut surface formed by cutting the second sealing part; and an insulating member covering the sealing parts and the cut surfaces, wherein the first sealing part is bent in a direction of a first surface of the case, and a main portion of the insulating member is attached in a shape surrounding the first sealing part and the first cut surface, and wherein a side surface portion of the insulating member is attached in a shape surrounding the second sealing part and the second cut surface.