Button Cell Sealing Structure for Electrolyte Injection Assembly
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Solution Overview
Problem
Button cells in the prior art suffer from inferior sealing performance due to electrolyte solution splashing during the assembly process, leading to partial failure of the sealant ring.
Innovation Solution
A conductive member covers the opening of the top cover and is connected through a sealant ring in an insulated and sealed manner, with the cell placed in the bottom shell's cavity, and a sealing member covers the liquid injection port after electrolyte injection, enhancing the sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional button cell structure is used with a top cover and bottom shell, then the device can be manufactured with standard assembly processes, but the sealing performance is inferior due to electrolyte solution splashing during assembly
Solution Approach 1:
The conductive member is designed with a pre-formed sealing structure that includes an extension part extending into the accommodating cavity and a groove for receiving sealant. This preliminary preparation of sealing features before assembly ensures that when the top cover is connected to the bottom shell, the sealant is properly positioned to prevent electrolyte splashing, thus improving sealing performance without requiring complex assembly processes
Solution Approach 2:
A sealant ring is introduced as an intermediary material between the conductive member and the opening of the top cover. The sealant ring fills the groove and creates a sealing barrier that prevents electrolyte solution from splashing during assembly. This intermediary element effectively addresses the sealing issue while maintaining standard assembly procedures
2Reliability
If the conductive member thickness is increased to improve sealing, then the sealing performance improves, but the device dimensions increase
Solution Approach 1:
Instead of increasing the thickness of the conductive member in the axial direction, the invention extends the sealing function into the radial direction by adding an extension part that protrudes into the accommodating cavity. The groove for receiving sealant is formed on the side surface of this extension part, allowing the sealant to act in a different dimensional space. This approach improves sealing performance without increasing the overall thickness of the conductive member
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 described design improves the sealing performance of button cells by ensuring a secure and reliable connection between the conductive member and the top cover, preventing electrolyte leakage and maintaining the integrity of the cell.
Implementation Method 1
the top cover is provided with an opening in communication with the accommodating cavity, the conductive member covers the opening, and is connected to the top cover through a sealant ring in an insulated and sealed manner
Implementation Method 2
the liquid injection port being covered with a sealing member which is connected to the liquid injection port in a sealed manner
Implementation Method 3
the side wall is connected with the bottom wall at an arc-shaped angle, and the side wall is connected with the top cover at a right angle
Data Source
AI summary
The present disclosure provides a button cell and an electronic device. The button cell includes a case, a cell, a conductive member arranged on the case and connected to the case in an insulated manner, and a liquid injection port for injecting an electrolyte solution into an accommodating cavity. A cell is placed in an accommodating cavity of a bottom shell. A first tab is welded to an inner bottom wall of the bottom shell, and then the top cover having the conductive member is connected to the bottom shell in a sealed manner, with a second tab on the cell being electrically connected to the conductive member. Finally, an electrolyte solution is injected into the accommodating cavity. After the electrolyte solution is injected, a sealing member covers the liquid injection port, and the sealing member is connected to the liquid injection port in a sealed manner.