Multi-Tab Battery Insulator Layout for Jelly-Roll Can Isolation
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Solution Overview
Problem
The design of insulators for secondary batteries with multi-tabs is challenging due to the non-constant position of the multi-tab, making it difficult to effectively insulate the electrode assembly from the can and standardize the tab formation.
Innovation Solution
A secondary battery design featuring a jelly-roll with stacked electrodes and separators, a multi-tab structure, and an insulation member with a central hole and tab holes that allow the multi-tab parts to pass through, ensuring insulation between the jelly-roll and the can while minimizing the insulation member's size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the multi-tab position is not constant, then the battery design allows flexibility in electrode arrangement, but it becomes difficult to design and manufacture insulators with standardized dimensions
Solution Approach 1:
The insulator is divided into multiple segments corresponding to different tab positions. Each segment can be independently positioned to accommodate tabs at various locations around the jelly-roll perimeter, allowing the insulator to adapt to non-constant tab positions while maintaining standardized manufacturing through modular assembly
Solution Approach 2:
The insulator is designed with universal features that allow it to serve multiple functions: providing electrical insulation, accommodating tabs at different positions, and maintaining structural support. The insulator includes multiple mounting positions and adjustable components that enable it to adapt to various multi-tab configurations without requiring custom-designed insulators for each tab arrangement
2Adaptability or versatility
If the insulator is designed to accommodate non-constant multi-tab positions, then adaptability improves, but the insulator structure becomes more complex
Solution Approach 1:
The insulator employs a nested structure where multiple functional elements are integrated within a compact framework. The insulator includes nested compartments and layered construction that allow tab accommodation features to be embedded within the basic insulator body, maintaining a relatively simple external form while providing complex internal functionality for various tab positions
Solution Approach 2:
The insulator is designed with partial features for tab accommodation - only the necessary portions of the insulator are structured to accommodate tabs at specific positions, rather than providing full complexity throughout the entire insulator. This selective approach reduces overall structural complexity while still providing the needed adaptability for multi-tab configurations
Data Source
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AI summary
The present invention relates to a secondary battery provided with a multi-tab. The secondary battery includes a jelly-roll in which an electrode and a separator are stacked to cross each other and which is wound around a central core, a plurality of multi-tab parts extending from the electrode and formed on a predetermined area at an end of the jelly-roll, a can member accommodating the jelly-roll, and an insulation member disposed adjacent to the end to insulate the can member from the jelly-roll. The insulation member includes a central hole punched in a center of the insulation member so that the central core passes therethrough and a tab hole punched around the central hole to correspond to the plurality of multi-tab parts so that the plurality of multi-tab parts pass therethrough.