Battery Cover Plate Assembly With Locked Tab Connection
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Solution Overview
Problem
In existing lithium battery technologies, the connection structures of the cover plate assembly welded to the tabs can lead to issues such as explosion points, missing welding, and incomplete welding, due to potential gaps between the soft connection structures and the tabs.
Innovation Solution
A battery device with a cover plate assembly that includes a top cover with conductive structures, connection structures with first and second connectors, and a locking structure with locking members that penetrate the tabs and connect to installation holes, ensuring a secure and gap-free connection between the tabs and the poles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If soft connection structures are used to connect tabs and poles, then the connection is flexible and easy to manufacture, but gaps are likely to be caused between the connection structures and tabs, leading to explosion points, missing welding, and incomplete welding
Solution Approach 1:
The connection structure is divided into multiple segments: a first connector with a first connector body, a second connector with a second connector body, and multiple locking members. Each segment performs a specific function - the first connector connects to the pole, the second connector connects to the tab, and the locking members secure the connection. This segmentation allows for precise fitting and reliable connection while maintaining manufacturing simplicity.
Solution Approach 2:
The locking members are designed to be inserted through installation holes in the tab and first connector body before final welding occurs. This preliminary action pre-establishes the connection geometry, ensuring proper alignment and eliminating gaps before the welding process begins, thereby preventing explosion points and incomplete welding.
2Productivity
If direct welding is performed on soft connection structures to tabs, then the connection is formed quickly, but explosion points, missing welding, and incomplete welding are likely to occur due to gaps
Solution Approach 1:
The locking members are inserted through installation holes to pre-establish the connection geometry before welding. This preliminary action ensures proper alignment and eliminates gaps between the connection structure and tab, enabling high-precision welding to be performed quickly without rework or defects.
Solution Approach 2:
The invention replaces reliance on purely mechanical soft connection structures with a hybrid system that combines mechanical locking members (inserted through holes) with welding. This substitution ensures precise positioning and gap elimination, achieving both high productivity and manufacturing precision.
3Manufacturing precision
If locking members penetrate the tab to connect to installation holes, then gaps are prevented and welding quality is improved, but the device complexity increases
Solution Approach 1:
The connection structure is segmented into modular components (first connector, second connector, locking members) that can be independently manufactured and assembled. This segmentation simplifies the overall design while achieving precise fitting, as each component has a specific function and can be optimized separately.
Solution Approach 2:
The locking members serve multiple functions: they provide mechanical retention by penetrating the tab and first connector body, they establish precise alignment for welding, and they eliminate gaps between components. This multi-functionality reduces the need for additional specialized components, thereby managing device complexity while improving manufacturing precision.
Data Source
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AI summary
The invention provides a cover plate assembly for a battery and a battery device. The cover plate assembly for the battery includes a top cover; a conductive structure arranged on the top cover, the conductive structures including at least one pole for conducting electricity; at least one connection structure, a first end of each connection structure being electrically connected to a corresponding pole, a second end of the each connection structure being electrically connected to a tab of a cell, and the second end of the each connection structure being provided with an installation hole; and a locking structure including at least one locking member, each locking member penetrating the tab to be fixedly connected to the installation hole, to lock the tab on the connection structure.