Battery Cell Terminal Recess Structure for Stable Busbar Joining
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Solution Overview
Problem
The assembly difficulty between the current collecting member and the electrode terminal of the battery cell is high, and the connection stability between the electrode terminal and the busbar component is poor, leading to low production efficiency and short service life.
Innovation Solution
A battery cell design with a recessed electrode terminal structure, where the current collecting member is accommodated within a first recess and connected to the bottom of the recess, and the electrode terminal connects directly to the busbar component, eliminating the need for a cover plate, thereby enhancing connection strength and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the electrode terminal uses a conventional flat structure, then the assembly process is simple, but the assembly difficulty between the current collecting member and the electrode terminal is high
Solution Approach 1:
The electrode terminal employs a recessed structure at its end face, creating a localized geometric feature that receives the current collecting member. This local structural modification enables precise positioning and stable connection without complicating the overall manufacturing process, effectively reducing assembly difficulty while maintaining manufacturing simplicity.
2Reliability
If the electrode terminal connects to the busbar component through a cover plate, then the connection is protected, but the connection stability between the electrode terminal and the busbar component is poor
Solution Approach 1:
The invention integrates the connection function directly into the electrode terminal structure by forming a recess that receives the current collecting member. This merging of the connection interface into the terminal itself eliminates the need for separate cover plates, thereby improving connection stability while maintaining protective functionality through the unified structure.
Solution Approach 2:
The design removes the cover plate component from the connection assembly, extracting it from the system. The recessed electrode terminal structure assumes the protective and connective functions previously performed by the cover plate, simplifying the assembly and improving connection stability through direct contact between the current collecting member and busbar component.
3Strength
If the electrode terminal thickness is increased to accommodate the current collecting member, then the connection strength is improved, but the production efficiency decreases
Solution Approach 1:
Instead of increasing the electrode terminal thickness in the vertical direction, the invention creates a recessed structure that utilizes the horizontal plane dimension. The current collecting member is positioned within the recessed area on the end face of the electrode terminal, providing adequate connection strength through increased contact area without adding thickness, thereby maintaining production efficiency.
Data Source
AI summary
A battery cell, a battery, and an electric apparatus are provided. The battery cell includes a casing, an electrode assembly, an electrode terminal, and a current collecting member. The casing includes a first wall, and the electrode assembly is housed within the casing. The electrode terminal is disposed on the first wall, with a first recess formed at the end of the terminal facing the electrode assembly. The opposite end of the terminal is connected to a busbar component. The current collecting member is connected to the electrode assembly and at least partially received in the first recess, where it is joined to the bottom of the recess. This configuration eliminates the need for an additional recess and cover plate on the terminal end facing the busbar, thereby improving the connection stability between the electrode terminal and the busbar and reducing the risk of connection failure during use.