Electrode Plate Layout for Heat-Resistant Identification Marks
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Solution Overview
Problem
Existing battery designs face challenges in quickly and precisely analyzing failure causes due to the difficulty in forming and confirming identification marks on electrode leads and current collectors, which are prone to deformation under high heat.
Innovation Solution
The electrode plate features a band-like current collector with active material layers on both surfaces and an exposed part for the current collector lead, allowing for the precise formation of identification marks at a different position, enhancing stiffness and visibility of the marks, even when the components are deformed by heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If identification marks are formed on current collector leads or electrode current collectors, then manufacturing process history records can be confirmed, but the marks become difficult to form with high precision due to deformation under high heat
Solution Approach 1:
The patent introduces an intermediary object (transparent resin sheet with identification mark) that mediates between the marking requirement and the heat-resistant requirement. The transparent resin sheet is positioned between the positive electrode active material layer and the negative electrode, carrying the identification mark without being directly exposed to high heat that would cause deformation of the electrode components themselves.
Solution Approach 2:
The patent segments the identification mark function from the electrode structure by placing it on a separate transparent resin sheet rather than integrating it into the electrode current collector or lead. This segmentation allows the mark to be positioned optimally for visibility while maintaining the structural integrity of the electrode components under thermal stress.
2Area of stationary object
If identification marks are formed on narrow current collector leads, then space is saved, but it becomes difficult to form and confirm the marks
Solution Approach 1:
The patent moves the identification mark from the narrow one-dimensional current collector lead to a two-dimensional transparent resin sheet that spans across the electrode assembly. This dimensional change provides ample space for forming clear, readable identification marks while maintaining efficient space utilization through the thin-profile resin sheet placement.
Data Source
AI summary
This electrode plate has a band-shaped core, and an active material layer formed on both surfaces of the core, and a current collector lead is connected to an exposed part at which the core is exposed. The exposed part is placed on the longitudinal direction portion of the core, and an identification display part that can specify the history of the manufacturing process is formed at a position different from the current collector lead in the exposed part. In the core, the active material layer is placed at a position on the opposite side to the identification display part in the core thickness direction.