Battery Cell Connecting Member With Thinned Weld Joint
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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 strength through welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connecting member uses two connecting elements stacked and connected, then the electrical connection between tab and electrode terminal is established, but the connecting interfaces are prone to loosening and disconnecting
Solution Approach 1:
The patent changes the thickness parameter of the connecting member at the connecting position by providing thinning regions or grooves in the connecting elements. This parameter modification ensures that the thickness at the connecting position is less than the sum of maximum thicknesses of the first and second connecting elements, enabling full friction between surfaces during welding and improving bonding strength to prevent loosening and disconnection
Solution Approach 2:
The patent segments the connecting elements by introducing thinning regions and grooves that divide the connecting position into distinct zones. The grooves create separate regions for friction and bonding, allowing the welding process to act more effectively on specific areas, thereby enhancing the overall connection stability and preventing interface loosening
2Strength
If thinning regions or grooves are provided in the connecting elements, then full friction and bonding strength are improved through welding, but the manufacturing complexity increases
Solution Approach 1:
The patent modifies the thickness parameter of the connecting elements at specific positions by providing thinning regions or grooves. This parameter change is implemented through standard manufacturing processes such as machining or forming, which, while adding some complexity, ensure full friction and improved bonding strength during welding. The thinning regions are designed to be simple geometric features that can be integrated into existing manufacturing workflows
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
This design enhances the bonding strength between the connecting elements, ensuring a stable and secure electrical connection.
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
Data Source
AI summary
Examples of the present application provide a connecting member, a battery cell, a battery, a power consuming apparatus, and a connecting element. The connecting member includes a first connecting element and a second connecting element connected to each other. A portion of the first connecting element and a portion of the second connecting element are stacked in a thickness direction of the connecting member. One of the first connecting element and the second connecting element is configured to be connected to a tab. The other of the first connecting element and the second connecting element is configured to be connected to an electrode terminal. A thickness of the connecting member at a connecting position of the first connecting element and the second connecting element is less than a sum of maximum thicknesses of the first connecting element and the second connecting element.