Button Cell Sealing Structure to Prevent Electrolyte Splash
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Solution Overview
Problem
Button cells in prior art have inferior sealing performance due to splash of electrolyte solution during the riveting process of the conductive member, leading to partial failure of the sealant ring.
Innovation Solution
A button cell design where the conductive member covers the opening of the top cover through a sealant ring in an insulated and sealed manner, with the cell placed in an accommodating cavity, and the electrolyte solution injected through a liquid injection port, which is then sealed by a sealing member, enhancing the sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the conductive member is riveted to the top cover opening, then the conductive member is securely fixed, but electrolyte solution splashes during the process causing sealant ring failure
Solution Approach 1:
The patent applies preliminary action by first injecting the electrolyte solution into the accommodating cavity through the liquid injection port before performing the riveting operation on the conductive member. This sequence ensures that the electrolyte is already in place and the cavity is pressurized before the riveting process, preventing electrolyte splash during fixation. The sealant ring is also pre-installed on the top cover before the conductive member is fixed, ensuring proper sealing from the outset.
Solution Approach 2:
The patent implements beforehand cushioning by using the pressurized electrolyte solution in the accommodating cavity to counterbalance any potential splashing or leakage during the riveting process. The liquid pressure provides a cushioning effect that prevents the electrolyte from splashing outward when the conductive member is being fixed to the top cover, thereby protecting the sealant ring from failure.
2Reliability
If multiple sealing components are added to improve sealing performance, then sealing reliability improves, but device complexity increases
Solution Approach 1:
The patent merges multiple sealing functions into integrated components. The sealant ring serves dual purposes: it seals the interface between the top cover and the conductive member while also providing structural support during the riveting process. The cap structure combines the functions of closing the liquid injection port and providing a mounting surface for the sealing member. This merging approach achieves reliable sealing without proportionally increasing device complexity.
Solution Approach 2:
The patent applies universality by designing components that perform multiple functions. The top cover not only encloses the accommodating cavity but also provides the opening for conductive member attachment and the liquid injection port. The conductive member serves both as an electrical conductor and as a structural element that is fixed to the top cover. This multi-functionality reduces the need for separate dedicated sealing components, maintaining simplicity while achieving reliable sealing.
Data Source
AI summary
The present disclosure provides a button cell and an electronic device. In the button cell, a conductive member covers an opening of a top cover, and the top cover is connected to the conductive member. 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.