Button Battery Annular Seal Structure for Moisture Leakage Control
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Solution Overview
Problem
Button batteries face poor sealing performance due to the use of plastic films for insulating rings, which results in inadequate insulation and potential leakage.
Innovation Solution
A button battery design featuring a shell with a first and second housing that are hermetically connected, incorporating an annular seal with greater thickness at the open ends than at the central portion, enhancing sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic films are used to form an insulating ring with uniform thickness, then the insulating ring can be easily manufactured, but the sealing performance of the shell deteriorates
Solution Approach 1:
The insulating ring transitions from uniform thickness to variable thickness, with the first and second end portions having greater thickness than the intermediate portion. This local quality variation enhances sealing at the critical end portions where the housings connect, while maintaining manufacturability through injection molding processes.
Solution Approach 2:
The thickness parameter of the insulating ring is changed from constant to variable along its length. The first and second end portions have increased thickness compared to the intermediate portion, creating optimal sealing pressure distribution at the housing connections while preserving ease of manufacture through standard molding techniques.
2Device complexity
If the insulating ring has uniform thickness, then the manufacturing process is simple, but the sealing at the open ends is insufficient
Solution Approach 1:
The insulating ring employs local quality variation with thicker first and second end portions positioned at the open ends of the housings to provide enhanced sealing against dust, rain, and moisture. The intermediate portion maintains reduced thickness to avoid excessive complexity, balancing protection needs with manufacturing simplicity.
3Quantity of substance
If plastic films are used for the insulating ring, then material cost is reduced, but corrosion protection is compromised
Solution Approach 1:
The insulating ring utilizes parameter changes in thickness distribution, with thicker first and second end portions providing enhanced corrosion protection at the vulnerable open ends of the housings. This variable thickness design maintains material efficiency while significantly improving corrosion resistance where it is most needed.
Data Source
AI summary
Disclosed are a button battery and an electronic device. The battery includes: a battery cell; at least one tab with one end thereof connected to one collector of the battery cell; and a shell including a first housing and a second housing hermetically connected onto each other to enclose and form a cavity in which the battery cell and the tab are positioned, wherein the at least one tab is connected with the other end thereof to an inner wall of the first housing or to an inner wall of the second housing before the first housing and the second housing are hermetically connected.