Battery Cell Terminal Through-Hole Layout for Stronger Collector Connection
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Solution Overview
Problem
Existing battery cell technologies face challenges in improving safety performance due to low structural strength and connection reliability between the electrode terminal and the current collector.
Innovation Solution
The battery cell design includes a housing with a through hole, an electrode terminal with a connection portion located in the through hole, and a current collector with a protruding portion that is reduced in height, enhancing structural strength and connection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the protruding portion of the current collector is made longer to extend beyond the housing, then the electrical connection function is improved, but the structural strength and connection reliability deteriorate
Solution Approach 1:
The patent introduces a through-hole structure in the housing that provides a new spatial dimension for the connection. The protruding portion is positioned within this through-hole, allowing it to extend sufficiently for electrical connection while being laterally constrained by the through-hole walls, thus maintaining structural strength without requiring excessive length.
Solution Approach 2:
The through-hole in the housing acts as an intermediary structure that mediates between the electrical connection requirement and the structural strength requirement. It provides a confined space that allows the protruding portion to achieve adequate connection length while being laterally supported, preventing buckling or deformation.
2Reliability
If the protruding portion is made shorter to improve structural strength, then the connection reliability improves, but the electrical connection function deteriorates
Solution Approach 1:
The through-hole provides a vertical dimension for connection length while maintaining lateral constraints, allowing the protruding portion to be short in overall length but sufficient in the vertical dimension for electrical connection, thus achieving both reliability and functional requirements.
Solution Approach 2:
The protruding portion is designed with localized properties: it has sufficient length in the vertical direction for electrical connection, while the through-hole provides lateral support where needed. This local differentiation allows the structure to meet both connection and strength requirements without compromise.
3Ease of operation
If the protruding portion extends significantly beyond the housing, then the electrical connection is facilitated, but the displacement and instability increase
Solution Approach 1:
The through-hole serves as an intermediary constraint that allows the protruding portion to extend for electrical connection while preventing lateral displacement. The walls of the through-hole provide continuous lateral support, stabilizing the protruding portion throughout its extended length.
Solution Approach 2:
The design separates the functions into different dimensions: the vertical dimension allows extension for electrical connection, while the lateral dimensions are constrained by the through-hole to prevent displacement and maintain stability.
Data Source
AI summary
This application provides a battery cell, a battery, and an electric apparatus. The battery cell includes a housing, an electrode terminal, and a current collector. The housing has a first wall and an accommodating cavity. The first wall has a first through hole enabling communication between the accommodating cavity and the outside of the housing. The electrode terminal includes a base and a connection portion connected to the base. The base is located on a side of the first wall back away from the accommodating cavity. At least part of the connection portion is located in the first through hole. The current collector includes a body portion and a protruding portion connected to the body portion. The protruding portion protrudes towards the first wall, and the protruding portion is configured to be connected to the connection portion.