Button Cell Injection Port Structure for Clean Weld Sealing
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Solution Overview
Problem
The sealing performance of button cells is poor due to electrolyte residue affecting the welding and sealing of the metal housing, leading to safety and stability issues.
Innovation Solution
A recessed portion is designed at the orifice of the liquid injection hole to contain residual electrolyte, preventing it from adhering to the welding area, and a conductive member is connected with the housing in an insulated and sealed manner to improve sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If electrolyte is injected into the accommodating cavity through the liquid injection hole, then the button cell can be filled with electrolyte, but residual electrolyte adheres to the welding area affecting sealing performance
Solution Approach 1:
The liquid injection hole is divided into two functional zones: an upper welding area for sealing and a lower injection area for electrolyte filling. This segmentation allows the welding area to remain free of electrolyte residue while the injection area handles the electrolyte filling process, thereby resolving the contradiction between electrolyte filling and sealing performance.
2Ease of manufacture
If the liquid injection hole is positioned for easy electrolyte injection, then injection is simplified, but the welding area is contaminated by residual electrolyte
Solution Approach 1:
The liquid injection hole structure is segmented into an upper welding area and a lower injection area. The welding area is positioned above the injection area, allowing electrolyte to be injected from the bottom while keeping the welding area clean and free of residue, thus maintaining both ease of injection and welding quality.
Solution Approach 2:
The liquid injection hole is designed with a vertical dimension where the welding area is positioned in the upper portion and the injection area in the lower portion. This vertical arrangement allows gravity to assist electrolyte flow while keeping the welding area elevated and free from contamination, resolving the conflict between injection ease and welding precision.
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 enhances the safety and stability of the button cell by ensuring effective welding and sealing, maintaining the integrity of the housing and preventing electrolyte leakage.
Implementation Method 1
the covering member is welded to an outer side of the housing to cover the recessed portion and the liquid injection hole
Implementation Method 2
the conductive member covers the through hole and is connected with the head cover in an insulated and sealed manner through a sealing rubber ring
Data Source
AI summary
The present application provides a button cell and its manufacturing method and electronic equipment. The button cell includes a housing, an electrode assembly and a covering member, an accommodating cavity being provided in the housing, the electrode assembly being located in the accommodating cavity, the housing having a liquid injection hole for injecting electrolyte into the accommodating cavity; an outer surface of the housing having a recessed portion that is recessed towards an inner side of the accommodating cavity, the recessed portion being located at a orifice of the liquid injection hole and communicated with the liquid injection hole; and the covering member being welded to the outer side of the housing to cover the recessed portion and the liquid injection hole. The button cell and its manufacturing method and electronic equipment of the present.