Button Battery Sealing via Protrusion and Insulating Sleeve
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Solution Overview
Problem
Existing button batteries face sealing performance issues due to the volatilization of sealants, leading to leakage, as the sealing rubber ring can fall off from the metal housing over time.
Innovation Solution
A button battery design featuring a first and second shell with annular protrusions and an insulating sleeve, where the protrusions abut against the sleeve to create multiple seals, enhancing the sealing performance without relying on a traditional sealing ring, and optionally including through-holes or grooves for pressure relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing rubber ring connected with metal housing through sealant is used, then sealing performance is initially ensured, but after long time the sealant volatilizes causing the sealing rubber ring to fall off and leakage occurs
Solution Approach 1:
The patent removes the sealing rubber ring and sealant from the battery structure, replacing them with a sealing groove and sealing protrusion mechanism integrated into the metal housing itself. This extraction eliminates the components that cause sealing failure over time while maintaining the sealing function through a different mechanical approach.
Solution Approach 2:
The metal housing is designed with self-sealing capability through the sealing groove and protrusion structure. The housing itself performs the sealing function without requiring separate sealing components, achieving self-service where the structure seals itself through its own geometric features rather than relying on external sealants that degrade.
2Ease of manufacture
If traditional sealing ring structure is used, then assembly is simple, but sealing reliability deteriorates over time due to sealant volatilization
Solution Approach 1:
The sealing function is merged with the metal housing structure itself. The sealing groove and sealing protrusion are integrated features of the housing rather than separate components, combining the structural and sealing functions into a single element that maintains both ease of manufacture and long-term reliability.
3Reliability
If multiple sealing structures are added to improve sealing, then sealing performance improves, but device complexity increases
Solution Approach 1:
The sealing function is segmented into distinct geometric features (sealing groove, sealing protrusion, insulating sleeve) that work together as an integrated system. This segmentation allows each component to perform its specific sealing role while maintaining overall structural simplicity and avoiding the need for multiple separate sealing components.
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 improves sealing by creating multiple seals between the shells, preventing leakage and short circuits, while also allowing for a reduced battery size and enhanced explosion-proof performance.
Implementation Method 1
the first annular protrusion abuts against the insulating sleeve
Implementation Method 2
the first annular sidewall and the second annular sidewall are provided with an insulating sleeve therebetween to isolate the first annular sidewall from the second annular sidewall and thus prevent the first annular sidewall and the second annular sidewall from being short-circuited
Data Source
AI summary
Disclosed is a button battery or cylindrical battery, including: a first shell (1), the first shell (1) comprising a first annular sidewall (11) and a first end cover (12), wherein the first annular sidewall (11) is hermetically provided with the first end cover (12) at one end and is open at the other end; a second shell (2), the second shell (2) comprising a second annular sidewall (21) and a second end cover (22), wherein the second annular sidewall (21) is hermetically provided with the second end cover (22) at one end and is open at the other end; the first shell (1) and the second shell (2) are connected together with their open ends opposite to each other, the first annular sidewall (11) is sleeved outside the second annular sidewall (21), an insulating sleeve (3) is provided between the first annular sidewall (11) and the second annular sidewall (21), a first annular protrusion (23) protruding toward the insulating sleeve (3) is formed in the circumferential direction of the outer surface of the second annular sidewall (21), and the first annular protrusion (23) abuts against the insulating sleeve (3).