Arc-Wrinkled Electrode Tabs for Uniform Battery Tab Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In existing batteries, electrode tabs that are not stacked flat can lead to uneven thickness, inhibiting stable welding and bonding with electrode collecting members, resulting in potential instability and breakage.
Innovation Solution
The electrode tabs are designed with arc-shaped wrinkles that reduce bending at their tips, ensuring uniform thickness and stable bonding by forming a convex shape towards the tip, optionally combined with linear wrinkles to enhance strength and alignment, and are bonded to the electrode collecting member with center portions convexly curved towards it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple electrode tabs are stacked to form an electrode tab group, then the electrical connection between electrode plates and collecting members is improved, but the thickness becomes uneven and bonding stability deteriorates
Solution Approach 1:
The patent introduces wrinkles with specific geometric parameters (amplitude, wavelength, depth) on the electrode tabs to control their deformation characteristics. By adjusting these parameters, the tabs maintain consistent thickness when stacked, enabling stable bonding while preserving electrical connectivity.
Solution Approach 2:
The patent applies curved wrinkle patterns on the electrode tab surfaces rather than flat configurations. These curved structures allow the tabs to compress uniformly when stacked, maintaining consistent thickness and improving bonding reliability without compromising electrical connection.
2Ease of manufacture
If electrode tabs are stacked with bent tips, then the electrode tab group can be formed, but the bonding with electroconductive members becomes unstable
Solution Approach 1:
The patent optimizes the wrinkle parameters (amplitude, wavelength, depth) to control tab deformation during stacking. This ensures that bent tips are formed with consistent geometry, enabling reliable bonding while maintaining ease of electrode tab group formation.
Solution Approach 2:
The wrinkles are pre-formed on the electrode tabs before stacking to control the deformation behavior during the stacking process. This preliminary structuring ensures uniform compression and consistent thickness, enabling stable bonding.
3Adaptability or versatility
If the electrode tab thickness is non-uniform, then the electrode tab group can accommodate bent tips, but the bonding strength with electroconductive members is reduced
Solution Approach 1:
The patent carefully controls wrinkle parameters to allow controlled deformation while maintaining uniform thickness in the stacked configuration. The wrinkles are designed with specific amplitude and depth to accommodate bending without compromising bonding strength.
Solution Approach 2:
The curved wrinkle structures enable the tabs to accommodate deformation through controlled curvature rather than sharp bends. This maintains uniform thickness distribution in the stacked state, preserving bonding strength while allowing adaptability.
Data Source
AI summary
The battery disclosed herein includes: a positive electrode plate including a positive electrode substrate and a positive electrode active material layer disposed on the positive electrode substrate; and a negative electrode plate including a negative electrode substrate and a negative electrode active material layer disposed on the negative electrode substrate. At least one of the positive electrode plate or the negative electrode plate has multiple electrode tabs protruding outward from a region of the associated electrode substrate where the associated electrode active material layer is not disposed. The electrode tabs each have an arc-shaped wrinkle.