Button Battery Sealing Structure to Prevent Cover Bending
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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
A button battery design featuring a first housing assembly with a first annular wall and a sealing member, and a second housing with a second annular wall, where a first inclined face on the sealing member distributes assembly pressure, reducing horizontal compressive forces and concentrating them vertically to avoid bending of the first substrate, while ensuring a balanced compression and sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If assembly pressure is applied during the assembly process of the button battery, then the positive electrode cover can be assembled to the negative electrode cover, but the negative electrode cover would be bent, affecting the performance and service life of the battery
Solution Approach 1:
The patent introduces a localized inclined face structure on the sealing member that concentrates the assembly pressure at specific locations rather than distributing it uniformly. This allows the assembly pressure to be applied effectively to join the electrode covers while preventing excessive pressure from bending the negative electrode cover, thus resolving the contradiction between ease of manufacture and structural stability
Solution Approach 2:
The sealing member with the inclined face acts as an intermediary element between the assembly pressure and the electrode covers. It mediates the force transmission by converting the vertical assembly pressure into localized contact forces at the inclined face, enabling successful assembly without directly transmitting excessive bending forces to the negative electrode cover
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 improves sealing performance, suppresses electrolyte evaporation, and enhances the battery's performance and service life by distributing assembly pressure effectively and maintaining a good seal, thus preventing external moisture ingress.
Implementation Method 1
A first inclined face is arranged at the first end, the first inclined face is inclined relative to the first annular wall; and a lapping end is abutted against the first inclined face
Data Source
AI summary
A button battery is provided in the present application. 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.