Battery Cell Cover Plate Extension for Faster Hermetic Joining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery technologies face challenges in improving processing and production efficiency, particularly due to limitations in the hermetic connection between the housing and the cover plate, which affects the structural strength, sealing reliability, and overall efficiency of battery cells.
Innovation Solution
The introduction of extension portions on the cover plate and housing, such as first and second extension structures, increases the contact area between the cover plate and the housing, facilitating a stronger hermetic connection through welding or other means, thereby enhancing the structural strength and sealing reliability of the battery cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the housing and cover plate is increased to improve hermetic connection strength, then the connection strength is improved, but the processing efficiency and production cost are reduced
Solution Approach 1:
The patent transitions from increasing thickness (one dimension) to extending the cover plate outward (another dimension) to increase the connection area. The extension portion projects from the cover plate surface, creating additional connection interface without increasing the thickness of the housing or cover plate components themselves.
Solution Approach 2:
The extension portion is pre-formed as an integral part of the cover plate structure, creating a ready-to-connect interface that facilitates hermetic connection during assembly. This preliminary structural preparation enables efficient welding or sealing operations without requiring additional thickening of components.
2Reliability
If the contact area between housing and cover plate is increased to improve hermetic connection, then the sealing reliability is improved, but the structural complexity is increased
Solution Approach 1:
The connection interface is segmented into the main cover plate body and the extension portion. This segmentation allows the extension to provide additional sealing area while remaining a distinct, manageable structural element that can be designed and manufactured separately as an integral feature.
Solution Approach 2:
The extension portion serves multiple functions: it increases the contact area for hermetic connection, provides a larger welding or sealing surface, and maintains structural integrity. This multi-functional element improves sealing reliability without requiring separate additional components.
3Area of stationary object
If the extension portion is disposed on the outer surface of the battery cell, then the contact area is increased, but the mounting efficiency is reduced due to mutual interference
Solution Approach 1:
The extension portion is nested within the internal space of the battery cell, projecting inward from the cover plate toward the interior. This nesting approach allows the extension to increase contact area for hermetic connection without occupying external space that would interfere with the mounting or stacking of adjacent battery cells.
Data Source
AI summary
A battery cell, a battery, and an electrical device are described. The battery cell includes: a housing of a hollow structure with an opening; and a cover plate, configured to fit and cover the opening. An extension portion extending toward the housing is disposed at an edge region of the cover plate, and/or, an extension portion extending toward a center of the opening is disposed at an edge region of a sidewall of the housing, where the sidewall is configured to form the opening. The extension portion is configured to connect the housing and the cover plate. The battery cell, battery, and electrical device provided can improve processing efficiency of the battery cell.