Battery Cell Terminal Seal Interlock Against Pressure Detachment
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Solution Overview
Problem
The reliability of battery seals is compromised due to deformation or detachment under external pressures, impacting the integrity and performance of battery cells.
Innovation Solution
A battery cell design featuring mutually matched protrusions and grooves on the sealing member and first wall enhances the sealing integrity by limiting relative sliding and improving the fit between the sealing member and the wall, even under pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the sealing member is made simple in structure, then the ease of manufacture is improved, but the reliability deteriorates due to deformation or detachment under external pressures
Solution Approach 1:
The sealing member is divided into multiple functional parts: a main body portion, an extension portion, a protrusion, and a groove. This segmentation allows each part to perform its specific function - the main body seals the electrode lead-out hole, the extension portion bridges gaps between components, the protrusion provides mechanical interlocking with the wall, and the groove receives the protrusion to prevent detachment. This segmented design improves reliability without significantly complicating manufacturing.
Solution Approach 2:
The protrusion is nested within the groove to create a mechanical interlocking structure. The groove is formed on the wall and the protrusion extends from the extension portion into this groove, creating a nested configuration that prevents the sealing member from detaching under external pressure while maintaining structural simplicity.
2Ease of operation
If the sealing member is made detachable for assembly purposes, then the ease of operation is improved, but the reliability deteriorates due to possibility of falling off
Solution Approach 1:
The groove is pre-formed on the wall at the appropriate position before the sealing member is installed. This preliminary preparation allows the protrusion to be easily guided into the groove during assembly, providing ease of operation. Once assembled, the interlocking structure ensures the sealing member cannot detach, maintaining reliability.
3Reliability
If the sealing member fits tightly to the wall, then the reliability is improved by reducing detachment, but the device complexity increases due to additional structural features
Solution Approach 1:
Instead of making the entire sealing member complex, the invention applies local quality by adding structural features only where needed. The protrusion and groove are localized features at specific positions on the sealing member and wall, providing the necessary mechanical interlocking and tight fit only at the critical interface, while the rest of the sealing member remains simple in structure.
Data Source
AI summary
A battery cell, a battery and an electrical apparatus. The battery cell includes: an electrode terminal; a first wall, the first wall being provided with an electrode lead-out hole, and the electrode terminal and the electrode lead-out hole being arranged opposite to each other; and a sealing member, the sealing member being arranged around the electrode lead-out hole, the sealing member including an extension portion, the extension portion being at least partially arranged between the first wall and the electrode terminal, the extension portion being provided with one of a first protrusion and a first groove, the first wall being provided with the other one of the first protrusion and the first groove, and the first protrusion and the first groove being matched with each other.