Welding Protection Sheet Notch Structure for Battery Tab Alignment
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Solution Overview
Problem
Existing energy storage devices face challenges with low alignment efficiency and poor alignment precision during the welding process, leading to inefficiencies and reliability issues in the connection between the welding protection sheet and the tab, which affects the overall performance and service life of the energy storage device.
Innovation Solution
The energy storage device incorporates a welding protection sheet with a double-layer structure, featuring a first and second extending portion that are foldable relative to the body, and notched corners to improve alignment and stability, allowing for precise placement and enhanced connection strength between the welding protection sheet, tab, and connector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple welding protection sheet structure is used, then the device complexity is reduced, but the alignment precision and connection reliability deteriorate
Solution Approach 1:
The welding protection sheet is segmented into multiple functional regions: a body portion, a first extending portion with first notches at its ends, and a second extending portion with second notches at its ends. This segmentation allows each region to serve specific purposes - the body provides the base structure, while the extending portions with notches enable precise alignment and positioning during welding operations, thereby improving alignment precision without significantly increasing overall device complexity.
Solution Approach 2:
The first and second notches act as intermediary alignment features that facilitate precise positioning of the welding protection sheet relative to the tab and connector. These notched structures serve as mediators between the welding protection sheet and the welding fixtures, enabling accurate alignment during the welding process while maintaining a relatively simple overall sheet structure.
2Device complexity
If a simple welding protection sheet structure is used, then the device complexity is reduced, but the connection reliability deteriorates
Solution Approach 1:
The welding protection sheet is segmented into multiple functional regions: a body portion, a first extending portion with first notches at its ends, and a second extending portion with second notches at its ends. This segmentation allows each region to serve specific purposes - the body provides the base structure, while the extending portions with notches enable precise alignment and positioning during welding operations, thereby improving alignment precision without significantly increasing overall device complexity.
Solution Approach 2:
The first and second notches act as intermediary alignment features that facilitate precise positioning of the welding protection sheet relative to the tab and connector. These notched structures serve as mediators between the welding protection sheet and the welding fixtures, enabling accurate alignment during the welding process while maintaining a relatively simple overall sheet structure.
3Manufacturing precision
If alignment precision is improved through complex structures, then connection reliability is improved, but the production efficiency deteriorates
Solution Approach 1:
The welding protection sheet is segmented into multiple functional regions: a body portion, a first extending portion with first notches at its ends, and a second extending portion with second notches at its ends. This segmentation allows each region to serve specific purposes - the body provides the base structure, while the extending portions with notches enable precise alignment and positioning during welding operations, thereby improving alignment precision without significantly increasing overall device complexity.
Solution Approach 2:
The first and second notches on the welding protection sheet enable self-alignment during the welding process. The notched structures automatically position the welding protection sheet correctly relative to the tab and connector without requiring complex external alignment fixtures or procedures, thereby maintaining high production efficiency while achieving precise alignment.
Data Source
AI summary
Provided are an energy storage device and an electric device. The energy storage device includes a connector, a tab, and a welding protection sheet. The tab is connected to the connector. The welding protection sheet abuts against a surface of the tab away from the connector. The welding protection sheet includes a body, a first bent connection portion, and a first extending portion. The first bent connection portion is connected between the first extending portion and the body, and the first extending portion is foldable relative to the body to face towards the body. An end portion of the first extending portion away from the first bent connection portion has a first notch. The first notch has a width less than a width of the first extending portion. A distance between two first corners of the first extending portion is less than a length of the body.