Battery Cell Terminal Riveting for Stable Casing Assembly
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Solution Overview
Problem
The complex post terminal mounting process in batteries, typically involving welding, hinders production efficiency and poses a risk of detachment during use, affecting the reliability of battery cells.
Innovation Solution
A housing assembly with integrally formed post terminals, featuring a post terminal body and limiting stages that are riveted to the housing, facilitating assembly and enhancing connection stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding is used to mount post terminals on battery cell housings, then the connection strength is improved, but the manufacturing process complexity increases and production efficiency decreases
Solution Approach 1:
The patent replaces the welding process (thermal/mechanical system) with a mechanical pressing and riveting system. The post terminal includes pressing portions that are pressed into corresponding recesses in the housing, and riveting portions that are riveted from the interior side, creating a secure mechanical connection without welding. This substitution simplifies the manufacturing process while maintaining connection strength.
2Reliability
If welding is used to mount post terminals, then connection reliability is improved, but production efficiency deteriorates
Solution Approach 1:
The post terminal is segmented into multiple functional portions: a body portion, pressing portions with pressing surfaces, and riveting portions. This segmentation allows each portion to perform its specific function - the pressing portions are pressed into recesses for initial positioning and electrical connection, while the riveting portions are secured from the interior. This modular design enables more efficient assembly compared to traditional welding while ensuring reliable connection.
3Device complexity
If traditional post terminal mounting is used, then the structure is simple, but the post terminal may detach or crack during charging and discharging
Solution Approach 1:
The housing is designed with pre-formed pressing recesses and riveting recesses before the post terminal is installed. The pressing portions of the post terminal are pressed into these pre-prepared recesses, creating preliminary mechanical interlocking and electrical connection. Subsequently, the riveting portions are secured from the interior side through the riveting recesses. This preliminary preparation of recesses ensures proper positioning and prevents detachment or cracking during battery operation.
Data Source
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AI summary
Disclosed in the present application are a casing assembly, a battery cell, a battery and an electrical apparatus. The casing assembly comprises a casing and first terminals, mounting holes being formed in the casing; each first terminal comprises a terminal body, a first limiting platform and a second limiting platform which are integrally formed, the terminal body passing through a mounting hole, and the first limiting platform and the second limiting platform being arranged at two ends of the terminal body in the axial direction of the mounting hole, and the first limiting platforms are in limiting fit with the outer side of the casing, and the second limiting platforms are in limiting fit with the inner side of the casing, such that the first terminals are riveted to the casing. The casing assembly of the present application facilitates assembly, and can improve the reliability and stability of connection between the first terminals and the casing.