Anode Extension Tab Welding Through Non-Conductive Layers
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Solution Overview
Problem
Electrochemical devices face challenges in establishing efficient charge transport between electrodes separated by electrically non-conductive layers, leading to high resistances and structural integrity issues during manufacturing and operation.
Innovation Solution
The use of anode extension tabs welded to individual anode portions, allowing for efficient electrical coupling with the terminal without damaging the structural integrity, avoiding the need for removing non-conductive layers or crimping, and employing ultrasonic welding for low-defect, low-resistance welds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional methods are used to establish electrical coupling between electrodes separated by non-conductive layers, then electrical connection is achieved, but structural integrity is damaged and manufacturing complexity increases
Solution Approach 1:
The anode is divided into multiple anode portions with individual extension tabs, allowing each portion to be independently connected to the terminal without requiring removal of non-conductive layers between them. This segmentation enables electrical coupling while preserving the structural integrity of the non-conductive layers.
Solution Approach 2:
Anode extension tabs serve as intermediary elements that bridge the electrical connection between individual anode portions and the terminal. These tabs are welded to the anode portions through the non-conductive layers without damaging them, providing an effective electrical pathway while maintaining structural integrity.
2Reliability
If non-conductive layers are removed to establish electrical connection, then resistance is reduced, but structural integrity is compromised
Solution Approach 1:
The extension tabs act as intermediaries that penetrate or contact through the non-conductive layers to establish electrical connection without requiring removal of these layers. The welding process creates conductive pathways through the non-conductive layers while the layers themselves remain intact, preserving mechanical strength.
Solution Approach 2:
The patent replaces mechanical removal of non-conductive layers with a welding-based electrical connection method. Instead of mechanically stripping layers to expose conductive surfaces, ultrasonic welding creates electrical pathways through the non-conductive layers, substituting a mechanical process with a thermal/sonic process that preserves structural integrity.
3Ease of manufacture
If crimping is used to connect anode portions to terminal, then manufacturing is simplified, but weld defects increase and electrical resistance increases
Solution Approach 1:
The patent replaces crimping (a mechanical deformation process) with ultrasonic welding (a thermal/sonic process). This substitution eliminates the defects associated with crimping such as high contact resistance and mechanical damage, while maintaining manufacturing simplicity through automated welding processes.
Solution Approach 2:
The invention changes the fundamental parameters of the connection process by using ultrasonic welding instead of crimping. This involves changing from mechanical pressure and deformation to controlled thermal and sonic energy application, resulting in lower resistance and fewer defects while maintaining ease of manufacture.
4Reliability
If extension tabs are welded through electroactive material layers, then electrical coupling is improved, but manufacturing complexity increases
Solution Approach 1:
The extension tabs are pre-formed and attached to anode portions before assembly into the final device. This extraction of the connection function into a separate, pre-prepared component simplifies the overall manufacturing process by allowing parallel production of tabs and anode portions, reducing the complexity of final assembly.
Solution Approach 2:
The welding of extension tabs to anode portions is performed as a preliminary action during anode fabrication, before the anodes are assembled into the complete electrochemical device. This preliminary attachment ensures proper electrical coupling is established early in the manufacturing process, avoiding the need for complex post-assembly connection steps.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables improved electrical and mechanical connections between anode portions and the terminal, maintaining mechanical strength and reducing manufacturing costs while enhancing the performance of electrochemical devices.
Implementation Method 1
employing ultrasonic welding for low-defect, low-resistance welds
Data Source
AI summary
Anode tab extensions, and associated articles and methods are generally described. Methods for electrically coupling anode portions within electrochemical devices, and associated articles and systems, are generally described. In some cases, an electrically non-conductive layer is disposed between multiple anode portions that are to be coupled. In some cases, the method comprises welding metal extension tabs to the multiple anodes to establish electrical connection between the multiple anodes that are separated by one or more electrically non-conductive layers and the anode terminal.