Full-Tab Welding Layout for Uniform Current in Cylindrical Batteries
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Solution Overview
Problem
Existing tab welding methods in cylindrical batteries result in irregular current flow paths, leading to over-current in some areas and increased current loss.
Innovation Solution
A tab welding structure with radial and wave-patterned welding point groups is employed, confining welding points within specific areas to create a more orderly layout, enhancing over-current capacity and reducing current loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If full tab laser welding method is used, then welding process is simplified, but current flow becomes irregular and chaotic causing over-current and increased current loss
Solution Approach 1:
The full tab welding structure is segmented into multiple welding point groups arranged in specific patterns (radial and wave patterns). This segmentation transforms the chaotic current flow into organized pathways, reducing current loss while maintaining manufacturing simplicity through automated patterned welding.
Solution Approach 2:
Different regions of the tab are assigned different welding point densities and arrangements. The radial and wave patterns create local variations in welding point distribution, optimizing current flow in different areas to prevent over-current while maintaining overall process simplicity.
2Ease of manufacture
If full tab laser welding method is used, then welding process is simplified, but over-current performance of electrode plate deteriorates
Solution Approach 1:
The tab welding structure is divided into multiple welding point groups arranged in radial and wave patterns. This segmentation creates organized current flow pathways that distribute current evenly, improving over-current performance while maintaining manufacturing simplicity through automated patterned welding.
Solution Approach 2:
The welding points are arranged in two-dimensional radial and wave patterns rather than simple linear or random arrangements. This dimensional organization optimizes current distribution across the electrode plate surface, enhancing over-current performance while preserving manufacturing efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The radial and wave-patterned arrangement improves current distribution regularity, reducing current loss and enhancing the over-current capacity of the electrode plate.
Implementation Method 1
Through the welding points, current is conducted to an electrode plate
Implementation Method 2
Tab welding typically employs a full tab laser welding method
Data Source
AI summary
A tab welding structure and a battery are provided, relating to the field of battery technology. The tab welding structure includes a wound body with an electrode plate, and a full tab. The full tab is electrically connected to the electrode plate and located at one end of the wound body. A current collector is welded to the full tab to form welding point groups. The welding point groups are arranged in a radial pattern around a center of the wound body. Each welding point group includes welding points arranged in a wave pattern along a radial direction of the wound body. This configuration enhances the uniformity of current conduction in the wound body and reduces the amount of current loss.