Rechargeable Battery Insulating Member Segmentation
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Solution Overview
Problem
Rechargeable batteries face challenges in achieving high energy density per volume and ensuring secure attachment of components to withstand external impacts while minimizing structural thickness for increased electrolyte capacity.
Innovation Solution
The design incorporates an insulating member with a base plate and supporting ribs that securely attach the cap plate to the storage case, allowing for a simplified structure, reduced thickness, and enhanced impact resistance, while also facilitating greater electrolyte injection and improved manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick insulating structure is used to ensure secure attachment and insulation between components, then impact resistance and insulation reliability are improved, but the battery volume increases and energy density per volume decreases
Solution Approach 1:
The insulating member is segmented into a base plate and multiple supporting ribs protruding from it. This segmentation allows the insulating function to be distributed across multiple strategic locations rather than requiring a uniformly thick structure, reducing overall material usage and volume while maintaining insulation reliability at critical points where ribs contact the storage case.
Solution Approach 2:
The supporting ribs extend vertically from the base plate toward the cap plate, utilizing the vertical dimension to provide insulation and structural support. This dimensional approach allows thin horizontal profiles with adequate vertical insulation thickness, enabling secure attachment without increasing the battery's horizontal footprint or overall volume.
2Reliability
If a thick insulating structure is used to ensure secure attachment and insulation between components, then impact resistance and insulation reliability are improved, but energy density per volume decreases
Solution Approach 1:
The insulating member is segmented into a base plate and multiple supporting ribs protruding from it. This segmentation allows the insulating function to be distributed across multiple strategic locations rather than requiring a uniformly thick structure, reducing overall material usage and volume while maintaining insulation reliability at critical points where ribs contact the storage case.
Solution Approach 2:
Insulation thickness is concentrated locally at the supporting ribs where they contact the storage case and between the base plate and cap plate, rather than maintaining uniform thickness throughout. This local quality approach ensures insulation reliability at critical interfaces while minimizing overall insulating material volume, preserving battery energy density.
3Strength
If structural thickness is increased to ensure secure attachment of components, then impact resistance is improved, but the space for electrolyte injection is reduced
Solution Approach 1:
The insulating member is segmented into a base plate and multiple supporting ribs protruding from it. This segmentation allows the insulating function to be distributed across multiple strategic locations rather than requiring a uniformly thick structure, reducing overall material usage and volume while maintaining insulation reliability at critical points where ribs contact the storage case.
Solution Approach 2:
The supporting ribs extend vertically from the base plate toward the cap plate, utilizing the vertical dimension to provide insulation and structural support. This dimensional approach allows thin horizontal profiles with adequate vertical insulation thickness, enabling secure attachment without increasing the battery's horizontal footprint or overall volume.
4Ease of manufacture
If a simplified insulating structure is used to reduce manufacturing complexity, then manufacturing efficiency is improved, but impact resistance may be compromised
Solution Approach 1:
The insulating member is segmented into a base plate and multiple supporting ribs protruding from it. This segmentation allows the insulating function to be distributed across multiple strategic locations rather than requiring a uniformly thick structure, reducing overall material usage and volume while maintaining insulation reliability at critical points where ribs contact the storage case.
Solution Approach 2:
The insulating member with base plate and supporting ribs simultaneously performs multiple functions: electrical insulation between components, mechanical support for the cap plate, impact absorption, and structural attachment. This multi-functionality achieves reliable impact resistance without requiring separate dedicated components, simplifying manufacturing.
Data Source
AI summary
A rechargeable battery having an insulating member is disclosed. In one aspect, the battery includes an electrode assembly including a first electrode, a second electrode, and a separator interposed between the first and second electrodes. The battery also includes a storage case housing the electrode assembly. An opening is formed in the storage case. The battery further includes a cap plate attached to the opening of the storage case, a terminal penetrating through the cap plate, and a connection plate electrically connecting the terminal to the second electrode. The battery also includes an insulating member interposed between the cap plate and the connection plate. The insulating member includes a base plate contacting a bottom surface of the cap plate and a supporting rib that protrudes from the base plate and contacts an inner surface of the storage case.