Electrode Assembly Identification Layer for Durable Battery Traceability
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Solution Overview
Problem
Conventional batteries face issues with unrecognizable identification codes due to external forces like impact and friction, which complicates troubleshooting and tracing of battery abnormalities.
Innovation Solution
The battery design incorporates an identification portion on the electrode assembly instead of the housing, with a second layer covering the end portion and connected to both sides, enhancing adhesion and reducing the risk of smearing and deformation under external forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the identification code is placed on the battery housing, then it is easily accessible and visible, but it becomes unrecognizable due to impact and friction during use
Solution Approach 1:
The identification code is extracted from the battery housing and relocated to the electrode assembly, specifically on the second layer that covers the end portion of the stacked portion. This separation removes the identification code from the harmful environment of external impacts and friction that affect the housing, while maintaining its accessibility for troubleshooting and tracing purposes.
Solution Approach 2:
The identification code is nested within the battery structure by placing it on the second layer that is integrated into the electrode assembly. The second layer is connected to both sides of the stacked portion and covers the end portion, effectively nesting the identification code within the protective structure of the electrode assembly rather than leaving it on the external housing surface.
2Ease of operation
If the identification portion is placed on the first layer near the first end portion, then it is easily accessible, but it has higher risk of falling off under external forces
Solution Approach 1:
The second layer is designed with asymmetric coverage, extending to cover both the first end portion and the second end portion of the stacked portion, with the identification portion specifically positioned on the second layer away from the first end portion. This asymmetric design optimizes both accessibility and adhesion by strategically locating the identification portion on a stable area while maintaining connection to both ends.
Solution Approach 2:
The second layer is pre-configured to cover the end portion of the stacked portion and connect to both sides before the battery is subjected to external forces. This preliminary positioning ensures that the identification portion is already secured in a stable location with proper adhesion, preventing falling off or smearing when impact or friction occurs during subsequent use.
Data Source
AI summary
An electrode assembly includes a stacked portion and a second layer. The stacked portion includes a first layer disposed between a first conductive layer and a second conductive layer. The stacked portion is a wound structure including a first surface and a first end portion. The second layer is connected to the first surface. When viewed in the first direction, the first surface has a first region located on a first side of the first end portion and a second region located on a second side of the first end portion. In a second direction perpendicular to the first direction, the first side and the second side are located on two opposite sides of the first end portion. When viewed in a winding direction of the stacked portion, the second region is closer to the first end portion than the first region.