Battery Cell Connecting Member With Reinforced Bend Control
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Solution Overview
Problem
The issue of crease deflection during the bending process of connecting members in batteries, which complicates the installation of electrode assemblies into battery shells and can damage the connecting member, tab, and electrode terminal, thereby affecting battery performance.
Innovation Solution
A connecting member with a reinforcing structure in the connecting portion, enhancing its bending strength relative to the bending portion, allowing smoother installation and improved structural stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the connecting member is made thin and flexible to facilitate bending, then the ease of bending is improved, but the bending strength is reduced causing crease deflection
Solution Approach 1:
The connecting member employs different structural characteristics in different regions: the bending portion is designed to be thin and flexible to facilitate bending operations, while the connecting portion is reinforced with enhanced bending strength to prevent crease deflection. This local differentiation resolves the contradiction by allowing the member to be flexible where needed and strong where required.
Solution Approach 2:
The connecting member is divided into distinct functional segments: a bending portion for flexible deformation and a connecting portion with reinforcing structures for structural stability. This segmentation allows each part to be optimized independently - the bending portion for ease of bending and the connecting portion for preventing deflection during installation.
2Strength
If the connecting member is made thick and strong to prevent deflection, then the bending strength is improved, but the ease of bending is reduced
Solution Approach 1:
Rather than making the entire connecting member thick and strong, the reinforcement is applied locally to the connecting portion where structural stability is critical. The bending portion remains thin and flexible, maintaining ease of bending while the reinforced connecting portion prevents deflection during installation.
Solution Approach 2:
The member is segmented into a bending portion that remains thin for flexibility and a connecting portion that is reinforced for strength. This segmentation allows the thick, strong structure to be localized only where needed to prevent deflection, while the bending portion retains its ease of deformation.
3Ease of operation
If forcible installation is used to overcome deflection, then the installation difficulty is reduced, but damage to the connecting member, tab, and electrode terminal occurs
Solution Approach 1:
The reinforcing structures are pre-installed on the connecting portion before the bending and installation process. This preliminary reinforcement prevents crease deflection from occurring during installation, allowing the connecting member to be installed smoothly without requiring forcible actions that could damage the tab or electrode terminal.
Solution Approach 2:
The reinforcing structures act as a preventive measure against crease deflection during installation. By providing this structural support in advance, the design cushiones against the development of deflections that would otherwise require forcible installation and risk damaging critical components.
Data Source
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AI summary
Embodiments of this application provide a connecting member, a battery cell, a battery, and an electric apparatus. The connecting member is for use in a battery cell. The connecting member includes a connecting portion and a bending portion. The connecting portion is connected to the bending portion. The connecting portion has a reinforcing structure, and the reinforcing structure is configured to make a bending strength of the connecting portion greater than a bending strength of the bending portion. In the connecting member provided in the embodiments of this application, the bending strength of the connecting portion of the connecting member is greater than the bending strength of the bending portion of the connecting member. Therefore, it is easier for the bending portion to bend compared to the connecting portion, so that deflection of a bending axis of the bending portion is reduced in a bending process, thereby allowing the connecting member to be smoothly installed into a housing of the battery cell and enhancing structural stability of the connecting member.