Battery Cell Tab Structure With Insulating Member for Vibration Isolation
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Solution Overview
Problem
Current battery cell designs face challenges in maximizing energy density and ensuring safety due to the occupation of internal space by tabs with opposite polarities, which can lead to reduced space for the main body and increased risks of short circuits and tab deformation during vibration.
Innovation Solution
The battery cell design features an insulating member located between tabs with opposite polarities, which are positioned at the same end of the main body, allowing for a more compact housing and reducing the risk of short circuits by separating the tabs and limiting movement within the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If tabs with opposite polarities are positioned at the same end of the main body, then internal space is saved and energy density is improved, but the risk of short circuits between tabs increases
Solution Approach 1:
An insulating member is introduced as an intermediary element positioned between the first tab and the second tab. This insulating member prevents direct contact between tabs of opposite polarities, thereby eliminating the short circuit risk while allowing both tabs to be positioned at the same end of the main body for space optimization.
2Quantity of substance
If tabs with opposite polarities are positioned at the same end of the main body, then internal space is saved, but tab deformation during vibration increases
Solution Approach 1:
The insulating member serves as a mechanical intermediary that positions and stabilizes both tabs at the same end of the main body. By providing a fixed reference structure, it prevents relative movement between tabs during vibration, thereby reducing tab deformation while maintaining the space-saving configuration.
3Reliability
If additional current collectors are added to connect tabs, then electrical connection stability is improved, but device complexity and space occupation increase
Solution Approach 1:
The insulating member is designed to perform multiple functions simultaneously: it provides electrical insulation between tabs of opposite polarities, serves as a mechanical support structure for both tabs, and establishes stable electrical connections to the end cap and electrode terminal. This multi-functionality eliminates the need for separate current collectors, reducing device complexity while maintaining connection stability.
Data Source
AI summary
A battery cell includes a housing, an end cap, an electrode terminal, an electrode assembly, and an insulating member. The housing has an opening. The end cap is provided for covering the opening. The electrode terminal is in insulated connection with the end cap. The electrode assembly is housed within the housing and includes a main body and first and second tabs. The first and second tab have different polarities and are disposed on a same end of the main body facing the end cap. One of the first and second tabs is provided for electrically connecting the end cap, and the other one is provided for electrically connecting the electrode terminal. The insulating member is at least partially located between the first tab and the second tab, and abuts against the main body along a thickness direction of the end cap.