Battery Electrode Plate Marking Layout for Deformation Resistance
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Solution Overview
Problem
The identification marks on the core exposed portions of electrode plates are prone to deformation due to low stiffness, making them difficult to read during battery charging and discharging, especially when applied to leads with small widths.
Innovation Solution
The identification marks are formed in a projection range where the lead outline is projected, utilizing the higher stiffness of the lead to minimize deformation, and are covered by a tape to protect against wear and electrolytic exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the identification mark is provided on the core exposed portion, then it is possible to specify production lines and production date, but the identification mark is deformed by tensile force during charging and discharging due to low stiffness of the core exposed portion
Solution Approach 1:
The patent introduces a lead as an intermediary component between the core exposed portion and the identification mark. The lead has higher stiffness than the core exposed portion and serves as a stable substrate for forming the identification mark, thereby preventing deformation while maintaining the mark's association with the electrode plate
Solution Approach 2:
The patent applies different material properties to different locations: the lead region (with higher stiffness) is used for the identification mark formation, while the core exposed portion maintains its original properties. This local differentiation ensures the mark remains undeformed while preserving the functional characteristics of the core
2Reliability
If the identification mark is provided on the lead surface, then the lead has higher stiffness making it difficult to cause deformation, but the width of the lead is generally small making it difficult to provide the identification mark
Solution Approach 1:
The patent utilizes the thickness dimension of the lead to provide sufficient area for the identification mark. By forming the mark on the surface of the lead (utilizing thickness rather than width), the patent overcomes the limitation of small lead width while maintaining high stiffness for deformation resistance
Data Source
AI summary
A cylindrical battery which is one example of an embodiment of the present invention comprises, as an electrode plate, an electrode that includes a positive electrode plate and a negative electrode plate. The electrode plate includes: a core; a mix layer which is formed on the core; a lead which is connected to an exposed section of the core at which the surface thereof is exposed; and an identification display. In the exposed section, at least a part of the identification display is formed within a projection range in which the contour of the lead is projected.