Sliding Tab Connection for Laminated Battery Assembly
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Solution Overview
Problem
Laminated batteries face challenges during assembly due to difficulty in placing the laminated cell into the case, with tabs prone to folding or scratching, and tabs are susceptible to tearing due to electrode expansion, affecting production yield.
Innovation Solution
A laminated battery design featuring a slidably connected pin system within a cap assembly that allows tabs to slide on a connection portion, preventing tab tearing and folding during assembly, and includes liquid reservoirs to manage electrode expansion and electrolyte distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the laminated cell is placed into the case during assembly, then the battery structure is completed, but the tabs are prone to folding or scratching with the case
Solution Approach 1:
The patent applies the dynamics principle by designing the tab connection structure to be movable rather than fixed. The tabs are connected to the cap assembly through a sliding mechanism that allows them to move dynamically during electrode expansion and contraction, preventing folding and scratching while maintaining electrical connection reliability
Solution Approach 2:
The patent uses an intermediary sliding connection structure between the tabs and the cap assembly. This intermediary mechanism absorbs the mechanical stress from electrode expansion and prevents direct contact between the tabs and the case wall, eliminating the scratching problem while maintaining assembly efficiency
2Stability of the object's composition
If the tabs are fixed to the cap assembly, then electrical connection is stable, but the tabs are prone to tearing when electrodes expand
Solution Approach 1:
The patent transforms the fixed tab connection into a dynamic sliding connection. The tabs can slide along the cap assembly during electrode expansion and contraction, maintaining electrical connection stability while accommodating the mechanical changes without causing tab tearing
Solution Approach 2:
The patent changes the connection parameter from fixed to movable. By allowing the tabs to change their position relative to the cap assembly through sliding, the system maintains electrical connectivity while adapting to electrode volume changes, preventing tab failure
3Quantity of substance
If the electrodes are stacked closely for high energy density, then battery capacity increases, but the tabs are more susceptible to damage during expansion
Solution Approach 1:
The patent applies dynamics by creating a movable tab connection system that can accommodate the expansion forces from closely stacked electrodes. The sliding mechanism allows the tabs to move with electrode expansion rather than being constrained, maintaining both high energy density and tab durability
Data Source
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AI summary
A laminated cell includes a case, a laminated cell, and a cap assembly. The case defines an opening at the top. The laminated cell includes multiple electrode clusters. Each electrode cluster includes multiple laminated electrodes and multiple tabs. Each tab extends out of a corresponding one of the electrodes. The multiple tabs of each electrode clusters form a tab bundle, and the tab bundle is connected to one pin. The cap assembly includes a connection portion and a pole, the pin is slidably connected to the connection portion, and electrically connected to the pole through the connection portion. The laminated cell in the laminated battery is simple to enter the case, the laminated cell is not easy to be scratched with the case, and it is possible to effectively reduce the occurrence of tearing of the tabs caused by the expansion of the laminated cell.