Button Cell Cover Plate Structure for Hermetic Electrolyte Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The sealing performance of button cells is poor due to electrolyte splashing during the riveting process of the conductive member with the through hole, leading to partial failure of the insulating part and poor sealing.
Innovation Solution
The conductive member covers the through hole of the head cover in an insulated and sealed manner using an insulating part, and the head cover is welded with the housing after the electrode assembly is placed, with electrolyte injection through a liquid injection port covered by a conductive covering member post-injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insulating part is used to cover the through hole, then the sealing performance is improved, but the manufacturing complexity increases
Solution Approach 1:
The insulating part is applied locally only at the through hole area where sealing is needed, rather than throughout the entire structure. This localized approach provides the necessary sealing function while minimizing the addition of complex structural elements.
2Reliability
If the conductive covering member is added to cover the liquid injection port, then the sealing performance is enhanced, but the device complexity increases
Solution Approach 1:
The conductive covering member is applied locally only at the liquid injection port area, providing sealing enhancement precisely where needed without adding complex structures to other parts of the device.
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
This design enhances the sealing performance of the button cell by ensuring a hermetic connection and reducing leakage, thereby improving reliability and manufacturing efficiency.
Implementation Method 1
the head cover and the conductive member are connected together in an insulated and sealed manner through an insulating part
Implementation Method 2
the outer edge of the head cover is welded with a top end of the side wall
Implementation Method 3
the conductive covering member convers the liquid injection port and is electrically connected with the conductive member
Data Source
AI summary
A button cell includes a housing and a cover plate assembly, the housing including a bottom wall and an annular side wall integrally formed with the bottom wall, the cover plate assembly including a head cover, a conductive member and a conductive covering member. The middle area of the head cover has a through hole, and the conductive member covers the through hole and is connected with the head cover in an insulated manner; the outer edge of the head cover is welded with the top end of the side wall to form an accommodating cavity for accommodating an electrode assembly and electrolyte; the conductive member has a liquid injection port for injecting electrolyte into the accommodating cavity, and the conductive covering member covers the liquid injection port and is electrically connected with the conductive member. An electronic equipment includes an electronic equipment body and the button cell.