Battery Electrode Tab Flat Surface Design
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Solution Overview
Problem
In electronic devices, batteries with densely packed components often experience unpredictable interference between electrodes and other components, leading to physical, electrical, or chemical issues due to rough surfaces.
Innovation Solution
A battery design featuring an electrode assembly with a smooth and uniform bonding surface between the electrode substrate and tab, utilizing protrusions on the tab to enhance bonding while maintaining a flat opposite surface, reducing interference during assembly and packaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the electrode tab surface is roughened to enhance bonding strength, then the bonding strength between electrode tab and substrate is improved, but physical interference and frictional stress with surrounding components increases
Solution Approach 1:
The electrode tab is designed with differentiated surface properties: the bonding surface has protrusions for enhanced bonding strength, while the opposite surface is substantially flat to minimize physical interference. This local quality differentiation allows each surface to optimize its function independently.
Solution Approach 2:
The electrode tab surface is segmented into functionally distinct regions: a bonding surface with protrusions for attachment and an opposite surface that is substantially flat. This segmentation separates the bonding function from the spatial clearance function, resolving the contradiction between bonding strength and physical interference.
2Reliability
If protrusions are added to the electrode tab bonding surface to enhance bonding, then bonding reliability is improved, but the complexity of the electrode tab structure increases
Solution Approach 1:
Protrusions are added only to the bonding surface of the electrode tab where enhanced bonding is needed, while the opposite surface remains substantially flat. This localized modification improves bonding reliability without unnecessarily complicating the entire electrode tab structure.
3Volume of moving object
If the battery components are densely packed to reduce volume, then the volume of the battery is reduced, but unpredictable interference between electrodes and other components increases
Solution Approach 1:
The substantially flat opposite surface of the electrode tab creates a smooth profile that allows nearby components to be positioned closer without risk of physical interference, enabling denser battery packaging while maintaining component clearance.
Solution Approach 2:
Instead of adding protective features to prevent interference, the invention inverts the approach by creating a smooth flat surface that inherently minimizes interference potential, allowing components to be densely packed without increasing interference risks.
Data Source
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AI summary
A battery according to an embodiment may comprise an electrode assembly, said electrode assembly comprising an electrode substrate comprising a first area and a second area; an active material deposited on the first area of the electrode substrate; and an electrode tab attached to the second area of the electrode substrate, wherein the electrode tab comprises a bonding surface having at least one protrusion making contacting with a bonding location of the second area of the electrode substrate, wherein a surface opposite to the bonding surface and a surface opposite the bonding location are substantially flat.