Battery Cell Current Collector With Grooved Insulating Member
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Solution Overview
Problem
Conventional battery cells experience unstable electrical connections between the electrode tab and the current collector due to a small contact area, and the manufacturing process is complex due to the need for a separate insulator installation.
Innovation Solution
A battery cell design where the electrode tab is coupled to the electrode assembly on a surface facing the current collector, and the current collector includes an insulating member with grooves to increase the contact area with the electrode tabs, eliminating the need for a separate insulator installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate insulator is installed between the electrode tab and the current collector, then electrical connection can be achieved, but the manufacturing process becomes complex and the contact area remains small
Solution Approach 1:
The insulator and current collector are merged into a single integrated component. The insulating member is formed as one piece with the current collector plates, eliminating the need for separate insulator installation while maintaining electrical connection stability and simplifying the manufacturing process.
Solution Approach 2:
The insulating member is pre-formed with integrated current collector plates during the molding process. This preliminary formation of the complete assembly eliminates subsequent assembly steps and ensures proper positioning before the electrode tabs are inserted.
2Ease of manufacture
If the electrode tab is folded to contact the current collector, then electrical connection is achieved, but the contact area is small and connection stability is poor
Solution Approach 1:
The contact interface is transitioned from a point/line contact (folded tab) to a surface contact. The electrode tabs make broad surface contact with the current collector plates through the grooves in the insulating member, significantly increasing the contact area and connection stability.
Solution Approach 2:
The insulating member acts as an intermediary structure that facilitates optimal contact between the electrode tabs and current collector. The grooves in the insulating member guide and position the electrode tabs to achieve maximum surface contact area with the current collector plates.
3Object-affected harmful factors
If a separate insulator installation process is used, then insulation is provided, but the manufacturing process requires additional steps and time
Solution Approach 1:
The insulator and current collector are merged into a single integrated component manufactured in one molding process. This eliminates the need for separate insulator installation steps, reducing manufacturing complexity and improving production efficiency while maintaining proper electrical insulation.
Data Source
AI summary
The present disclosure relates to a battery cell and a method of manufacturing the same. According to the battery cell and the method of manufacturing the same, an electrode plate of the battery cell is coupled to an insulating member having a groove formed therein, and a portion of the electrode plate which fills the groove is formed to be in contact with an electrode tab, thereby electrically connecting the electrode tab of the battery cell and a current collector more stably.