Rechargeable Battery Electrode Tab Fixing Tape Design
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Solution Overview
Problem
Rechargeable batteries face challenges in securely fixing electrode tabs to prevent electrical shorts and optimize internal space for increased capacity, as existing designs often result in electrode tabs protruding or becoming separated from the pouch, leading to inefficiencies in space utilization and potential electrical issues.
Innovation Solution
The rechargeable battery design incorporates a first electrode tab with a protruding and parallel portion, a fixing tape that adheres to the electrode assembly, and an insulating tape to securely attach the electrode tabs at right angles, preventing separation and shorts while maximizing internal space and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrode tabs are made to protrude outwardly from the electrode assembly, then electrical connection is improved, but the tabs may become separated or shorted from the pouch
Solution Approach 1:
The fixing tape is applied to the electrode tab before assembling the battery into the pouch, pre-securing the tab to the electrode assembly. This preliminary fixing action ensures the tab maintains its position and electrical connection reliability throughout subsequent assembly and operation, preventing separation or shorting issues.
Solution Approach 2:
The fixing tape acts as an intermediary element between the electrode tab and the electrode assembly. This intermediate component provides a reliable bonding interface that secures the tab to the assembly, ensuring stable electrical connection while allowing the tab to protrude outwardly for external connectivity.
2Reliability
If electrode tabs are securely fixed to the electrode assembly, then separation and shorts are prevented, but internal space utilization is reduced
Solution Approach 1:
The fixing tape is applied selectively only to specific portions of the electrode tab and assembly where fixation is needed, rather than covering the entire structure. This localized application approach ensures reliable tab fixation while minimizing the space occupied by the fixing material, thereby optimizing internal space utilization within the battery pouch.
3Volume of stationary object
If the parallel portion of the electrode tab is bent along the first surface, then space utilization is improved, but the tab may become separated or shorted
Solution Approach 1:
The fixing tape is applied to the electrode tab before the tab is bent into its final configuration along the first surface of the electrode assembly. This preliminary fixation ensures that when the tab is bent to optimize space utilization, it remains securely attached to the assembly, preventing separation or shorting while maintaining the bent configuration.
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 configuration effectively prevents electrode tabs from being separated or shorted, enhances internal space utilization, and increases the capacity of the electrode assembly by securely fixing the tabs to the electrode assembly, thereby improving the battery's performance and efficiency.
Implementation Method 1
The fixing tape adheres to cover the parallel portion of the first electrode tab bent along the first surface of the electrode assembly and the first surface of the electrode assembly
Data Source
AI summary
A rechargeable battery includes an electrode assembly, a pouch accommodating the electrode assembly, a first electrode tab electrically connected to the electrode assembly, the first electrode tab including a protruding portion that protrudes outwardly from a first surface of the electrode assembly so as to be exposed to the outside of the pouch and a parallel portion that extends along the first surface of the electrode assembly, and a fixing tape that attaches and fixes the first electrode tab to the first surface of the electrode assembly. The fixing tape adheres to cover the parallel portion of the first electrode tab bent along the first surface of the electrode assembly and the first surface of the electrode assembly.