Battery Cell Insulating Sheet for Tab Clamping and Short-Circuit Prevention
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Solution Overview
Problem
Existing battery cells face safety issues due to tabs prone to contact with current collectors of opposite polarity, leading to short circuits, and require adhesive for tab fixation, increasing material costs.
Innovation Solution
An insulating sheet with a first and second sheet body, featuring a gap with ports allowing the tab to pass through, stabilizing its position and preventing contact with the current collector, thus enhancing safety and reducing the need for adhesive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a tab is fixed using adhesive, then the tab position is stabilized, but material costs increase due to additional adhesive material
Solution Approach 1:
The insulating sheet structure itself provides the stabilization function that previously required adhesive. The first and second sheet bodies form a clamp structure that mechanically secures the tab through the first gap, making the system self-sufficient without additional adhesive materials.
Solution Approach 2:
The adhesive function is extracted and replaced by the mechanical clamp structure of the insulating sheet. The first sheet body and second sheet body working together through the first gap provide the fixation function that was previously performed by adhesive, eliminating the need for separate adhesive application.
2Quantity of substance
If the tab is not secured, then material costs are reduced, but the tab may contact the current collector causing short circuits
Solution Approach 1:
The first gap of the insulating sheet acts as an intermediary structure between the tab and the current collector. It provides mechanical securing of the tab while maintaining electrical insulation, preventing contact with the current collector without requiring adhesive materials.
Solution Approach 2:
The insulating sheet structure itself provides both the securing function and the insulation function. The clamp structure formed by the first and second sheet bodies mechanically secures the tab while the insulating material prevents electrical contact, making the system self-sufficient for safety without additional components.
3Device complexity
If a single sheet body is used, then the structure is simpler, but the tab position stability is insufficient
Solution Approach 1:
The insulating sheet is divided into two functional parts: the first sheet body and the second sheet body. These two parts work together to form a clamp structure around the tab through the first gap, providing superior stabilization compared to a single sheet body while maintaining reasonable structural simplicity.
Solution Approach 2:
The first sheet body and second sheet body are merged into a single insulating sheet component that functions as an integrated clamp structure. This combination provides enhanced tab stabilization while avoiding the complexity of multiple separate components, as the two sheet bodies are connected to form one unified structure.
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
The solution stabilizes the tab's position, prevents short circuits, and omits the need for tab adhesive, improving safety and reducing material costs while maintaining electrical connection efficacy.
Implementation Method 1
the first sheet body and the second sheet body are connected through hot melting
Data Source
AI summary
An insulating sheet is used for a battery cell. The battery cell includes an electrode assembly, and the electrode assembly includes a first tab. The insulating sheet includes a first sheet body and a second sheet body. The first sheet body includes a first wall surface. The second sheet body is connected to the first sheet body, and the second sheet body includes a second wall surface facing the first wall surface. The first wall surface and the second wall surface jointly define a first gap, and the first gap has a first port and a second port distributed opposite each other. A direction from the first port to the second port is a first direction, and the first direction intersects with a direction perpendicular to the first wall surface.