Battery Cell Connecting Member With Thinned Weld Interface
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Solution Overview
Problem
The connecting interfaces of the two connecting elements in a battery cell's connecting member are prone to loosening and disconnecting, leading to instability in the electrical connection.
Innovation Solution
The thickness of the connecting member at the connecting position is reduced by providing thinning regions or grooves in the connecting elements, facilitating full friction and improved bonding through welding, thereby enhancing the connection strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the connecting member uses standard thickness connecting elements, then the structural integrity is maintained, but the bonding strength at the connecting interface is insufficient and prone to loosening
Solution Approach 1:
The connecting elements are designed with local thickness variations, featuring thinning regions at the connecting interfaces and thicker regions in other areas. This local quality differentiation allows the interface to achieve full friction and strong bonding during welding while maintaining overall structural integrity of the connecting member.
Solution Approach 2:
The thickness parameter of the connecting elements is changed locally at the connecting positions. By reducing the thickness at specific regions (creating thinning regions), the patent enables better contact and friction during welding, thereby improving bonding strength without compromising the overall structural strength of the connecting member.
2Strength
If the thickness of connecting elements is reduced at connecting positions, then full friction and bonding strength are improved, but the structural integrity may be compromised
Solution Approach 1:
The connecting elements incorporate thinning regions only at the connecting interfaces where bonding is required, while other portions maintain their original thickness. This localized approach ensures that structural integrity is preserved in non-connecting areas while achieving optimal bonding conditions at the interfaces.
Solution Approach 2:
The connecting elements are segmented into different thickness zones: thinning regions at connecting interfaces for optimal bonding, and thicker regions elsewhere for structural support. This segmentation allows the same component to fulfill both bonding and structural functions simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The reduced thickness and strategic design of the connecting elements improve the bonding strength and stability of the connection, ensuring a more secure electrical connection between the connecting elements.
Implementation Method 1
facilitates full friction between surfaces of the first connecting element and the second connecting element when the first connecting element and the second connecting element are connected together by means of welding
Implementation Method 2
when the first connecting element and the second connecting element are connected together by means of welding
Data Source
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AI summary
Examples of the present application provide a connecting member (233), a battery cell (20), a battery (10), a power consuming apparatus, and a connecting element. The connecting member (233) includes a first connecting element (2331) and a second connecting element (2332) connected to each other. A portion of the first connecting element (2331) and a portion of the second connecting element (2332) are stacked in a thickness direction of the connecting member (233). One of the first connecting element (2331) and the second connecting element (2332) is configured to be connected to a tab. The other of the first connecting element (2331) and the second connecting element (2332) is configured to be connected to an electrode terminal. A thickness of the connecting member (233) at a connecting position (2333) of the first connecting element (2331) and the second connecting element (2332) is less than a sum of maximum thicknesses of the first connecting element (2331) and the second connecting element (2332). According to the connecting member (233), the battery cell (20), the battery (10), the power consuming apparatus, and the connecting element in the examples of the present application, the strength of connection between the first connecting element (2331) and the second connecting element (2332) in the connecting member (233) can be improved.