Button Cell Sealing Member Inclined Face Pressure Distribution
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Solution Overview
Problem
Excessive assembly pressure during the assembly of button batteries can cause the negative electrode cover to bend, affecting the performance and service life of the battery.
Innovation Solution
The button battery design incorporates a first inclined face on the sealing member, which distributes assembly pressure horizontally and concentrates it vertically, reducing the risk of bending and improving sealing performance by integrating the first substrate, annular wall, and sealing member as an integrated structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If assembly pressure is applied during the assembly process of the button battery, then the sealing effect is improved, but the negative electrode cover would be bent, affecting the performance and service life of the battery
Solution Approach 1:
The patent introduces an inclined face structure that transforms the assembly force from a purely horizontal direction to include a vertical component. This dimensional change in force application allows the sealing member to be compressed effectively for sealing while reducing the horizontal bending force on the negative electrode cover.
Solution Approach 2:
The patent modifies the geometric parameters of the sealing member by adding an inclined face with a specific angle range (15°-45°). This parameter change optimizes the force distribution during assembly, converting excessive horizontal pressure into vertical compression that achieves sealing without causing cover bending.
2Reliability
If assembly pressure is applied during the assembly process of the button battery, then the sealing structure is formed, but the horizontal compressive force causes bending of the first substrate
Solution Approach 1:
The inclined face structure redirects the assembly force into a vertical dimension, creating a force component that compresses the sealing member effectively while minimizing the horizontal bending moment on the first substrate. This dimensional transformation protects the substrate from excessive bending stress.
Solution Approach 2:
By changing the geometric parameter of the sealing member (introducing the inclined face angle), the patent optimizes how assembly force is distributed. The specific angle range (15°-45°) ensures sufficient vertical compression for sealing while limiting horizontal force that would cause substrate bending.
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
The design effectively reduces the horizontal component of bending and improves sealing performance by distributing assembly pressure vertically, ensuring a good seal and suppressing electrolyte evaporation, thus enhancing battery performance and longevity.
Implementation Method 1
since a first inclined face is arranged, and the first inclined face is inclined relative to the first annular wall, according to the principle of force distribution in dynamics of theoretical mechanics, a horizontal compressive force is effectively reduced through the inclined face at a certain angle, and the force is concentrated in a vertical direction
Data Source
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AI summary
The present application provides a button battery. The button battery comprises: a first substrate, a first annular wall, and a sealing member. The first annular wall is arranged around a periphery of the first substrate and forms an accommodating cavity with the first substrate, and at least a part of the sealing member is located on a side, away from the accommodating cavity, of the first annular wall. A second housing includes a second substrate and a second annular wall. The second substrate is configured to cover and seal the accommodating cavity, and the second annular wall is connected to a periphery of the second substrate.