Battery Top Cover Current Collector Segmentation
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Solution Overview
Problem
During the assembly of cylindrical batteries, the current collector connected between a tab and a pole is prone to damage due to welding processes, which affects the integrity and performance of the battery.
Innovation Solution
A top cover assembly for batteries is designed with a current collector having multiple folding sections, allowing it to be folded in two different directions, thereby separating the first and third parts, reducing the impact of the welding process on both the pole and the battery core, and incorporating an insulating cover plate, top cover plate, and pressing block for enhanced sealing and structural stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current collector is directly connected between the pole and the battery core without folding sections, then the assembly is simple, but the current collector is prone to damage during welding processes
Solution Approach 1:
The current collector is divided into multiple sections by introducing first and second folding sections, creating distinct segments (first part, second part, third part) that can be independently positioned and welded, thereby protecting the current collector from damage while maintaining structural integrity
Solution Approach 2:
The folding sections introduce spatial dimensionality to the current collector structure, allowing it to fold in two different directions and create three-dimensional separation between welding zones, which protects the current collector from welding damage while maintaining electrical connectivity
2Object-affected harmful factors
If the first part and third part are close together during welding, then the structure is compact, but the welding process adversely affects both the pole and the battery core
Solution Approach 1:
The folding sections segment the current collector into distinct parts with the second part acting as a buffer zone, isolating the welding processes and preventing harmful thermal and mechanical effects from propagating between the pole and battery core
Solution Approach 2:
The second part of the current collector serves as an intermediary element between the first part (welded to pole) and third part (welded to battery core), absorbing and isolating the harmful effects of welding processes through its positioning and structural design
Data Source
AI summary
A top cover assembly for a battery, a battery, and an energy storage device are provided in the disclosure. The top cover assembly includes a pole and a current collector having multiple folding sections. The multiple folding sections include at least a first folding section and a second folding section. The first folding section is spaced apart from the second folding section in a length direction of the current collector. The current collector is divided by the first folding section and the second folding section into a first part, a second part, and a third part. The first part is bent toward one side of the second part and connected with the pole. The third part is bent toward the other side of the second part and connected with a wound core of the battery.