Pole-Collector Assembly for Cylindrical Full-Tab Battery Insulation
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Solution Overview
Problem
The assembled structure of a pole and a pole current collector disk in cylindrical lithium ion batteries is not suitable for cylindrical full-tab lithium ion batteries, as the existing designs do not accommodate the unique groove body structure and positive pole configuration of full-tab batteries.
Innovation Solution
An assembled structure comprising a positive pole, a positive current collector disk, a first insulating member, and a second insulating member, where the connection rod penetrates through both insulating members, forming an accommodating space, and the positive current collector disk includes a welding disk with a conductive protrusion for safe electrical connection and potential short-circuit protection, is designed for cylindrical full-tab lithium ion batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the existing assembled structure of pole and pole current collector disk is used, then the structure is simple and easy to manufacture, but it is not suitable for cylindrical full-tab lithium ion batteries with groove body structure
Solution Approach 1:
The insulating member is divided into a first insulating member and a second insulating member, which are arranged at different positions along the positive pole to provide targeted insulation protection. This segmentation allows the structure to adapt to the specific requirements of cylindrical full-tab lithium ion batteries while maintaining manageable complexity
Solution Approach 2:
The first and second insulating members act as intermediary elements between the positive pole and other battery components, providing insulation and structural support. These intermediary components enable the assembly to function properly in the cylindrical full-tab battery configuration without requiring complete redesign of the entire system
2Volume of moving object
If the connection rod penetrates through both insulating members forming an accommodating space, then the space utilization is optimized, but the assembly precision requirement increases
Solution Approach 1:
The first and second insulating members are pre-positioned along the positive pole at specific intervals before final assembly. This preliminary arrangement ensures that when the connection rod is inserted, the accommodating space is automatically formed at the correct position, reducing the precision requirements during final assembly while optimizing space utilization
Solution Approach 2:
The connection rod penetrates through the nested arrangement of the first and second insulating members, with the accommodating space formed within this nested structure. This nested configuration allows efficient use of the limited space in cylindrical full-tab lithium ion batteries while the modular nature maintains reasonable assembly precision requirements
3Reliability
If the contact portion is limited to the end surface of conductive protrusion and groove bottom surface, then short-circuit protection is improved, but the electrical connection area is reduced
Solution Approach 1:
The insulating members are strategically positioned to provide insulation only at critical locations where short-circuit risks exist, while allowing maximum electrical contact area between the conductive protrusion and groove bottom surface. This localized insulation approach maintains both safety and electrical performance
Solution Approach 2:
The insulation function is extracted and provided by separate first and second insulating members rather than relying on a continuous insulating layer. This extraction allows the contact surfaces to be maximized for electrical connection while the discrete insulating members provide targeted short-circuit protection at specific locations
Data Source
AI summary
Provided are an assembled structure of a pole and a pole current collector disk. The assembled structure includes a positive pole, a positive current collector disk, a first insulating member and a second insulating member, where the second insulating member is disposed between the positive current collector disk and the first insulating member. The positive pole includes a conductive end and a connection end, the conductive end and the connection end are connected through the connection rod. The connection rod sequentially penetrates through the first insulating member and the second insulating member, the first insulating member is closer to the conductive end than the second insulating member, and an accommodating space is formed between the first insulating member and the second insulating member. The positive current collector disk includes a welding disk and a conductive protrusion.