Battery Cell Sealing Structure Around Electrode Terminals
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Solution Overview
Problem
The processing and production efficiency of batteries is hindered by challenges in sealing battery cells, particularly due to the interference of electrode terminals with the welding process, which affects sealing performance and manufacturing costs.
Innovation Solution
A battery cell design featuring a shell and cover plate with a connecting structure that includes a first region corresponding to the electrode terminal, allowing for welding sealing along the edge of this region far away from the electrode terminal, thereby improving sealing efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If welding sealing is performed near the electrode terminal, then sealing reliability is improved, but the electrode terminal interferes with the welding process affecting processing efficiency
Solution Approach 1:
The connecting structure is divided into a first region corresponding to the electrode terminal and other regions. The welding sealing is performed in regions away from the electrode terminal, segmenting the sealing process from the electrode terminal interference zone, thereby resolving the conflict between sealing reliability and processing efficiency.
Solution Approach 2:
The first region acts as an intermediary zone between the electrode terminal and the welding sealing region. By positioning the welding sealing in regions adjacent to but not overlapping with the first region, the electrode terminal's interference is eliminated while maintaining sealing effectiveness through the mediating first region.
2Productivity
If the connecting structure is designed with a large first region to avoid electrode terminal interference, then processing efficiency is improved, but the device complexity increases
Solution Approach 1:
The first region is designed with specific local qualities (height and positioning) that differ from other regions of the connecting structure. This localized design allows the first region to fulfill its function of avoiding electrode terminal interference without requiring the entire connecting structure to be complex, thereby improving processing efficiency while controlling overall device complexity.
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 sealing efficiency, ensures sealing reliability, and improves the processing efficiency and safety performance of the battery cell by minimizing the impact of electrode terminals on the sealing process.
Implementation Method 1
when the shell and the cover plate of the battery cell are sealingly connected, for example, through welding, welding sealing can be performed along an edge of the first region far away from the inside of the battery cell
Data Source
AI summary
Embodiments of this application provide a battery cell, a battery, and an electric device. The battery cell includes: a shell, where the shell is a hollow structure with an opening, and an electrode terminal is provided on a first side wall of the shell adjacent to the opening; and a cover plate configured to cover the opening, where the cover plate and the shell are sealingly connected to form a connecting structure surrounding the opening, the connecting structure includes a first region corresponding to the electrode terminal, and an orthographic projection of a portion of the electrode terminal protruding from the outer surface of the first side wall on the connecting structure does not exceed the first region. The battery cell, battery, and electric device can improve the processing efficiency of the battery cell.