Cylindrical Battery Current Collector Weld Pattern Layout
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Solution Overview
Problem
Cylindrical batteries face issues with poor welding or over welding between electrode tabs and current collectors due to uncontrollable heat superposition during cyclical spot welding, degrading battery performance.
Innovation Solution
A cylindrical battery design with a current collector featuring distinct weld patterns in different regions, including a radial first weld pattern in the middle ring region and a circumferential second weld pattern in the inner or outer ring region, ensuring consistent thicknesses and improved welding quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cyclical spot welding is used to weld tabs to current collector, then welding operation can be completed, but uncontrollable heat superposition causes poor welding or over welding
Solution Approach 1:
The current collector is divided into multiple ring regions (outer ring region, middle ring region, inner ring region) with different weld patterns in each region. This segmentation allows different welding parameters and patterns to be applied to different areas, preventing heat superposition and ensuring consistent welding quality across the entire current collector surface.
Solution Approach 2:
Different weld patterns are designed for different ring regions of the current collector. The outer ring region has a first weld pattern, the middle ring region has a second weld pattern, and the inner ring region has a third weld pattern. This local quality approach ensures that each region receives appropriate welding treatment based on its specific requirements, preventing both poor welding and over welding.
2Manufacturing precision
If multiple weld patterns are arranged in different ring regions, then welding quality is improved, but current collector structure becomes more complex
Solution Approach 1:
The current collector is segmented into three distinct ring regions (outer, middle, inner) with clearly defined boundaries. Each region contains a specific weld pattern type, creating a structured yet simple design that is easy to manufacture while ensuring high welding quality through localized pattern optimization.
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 design enhances welding effectiveness between the current collector and electrode tabs, preventing poor or over welding, thereby improving battery performance and overcurrent capability.
Implementation Method 1
The current collector is welded to the tab welding region through the first weld pattern and the second weld pattern
Data Source
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AI summary
The present disclosure discloses a cylindrical battery and a power consumption device having same. The cylindrical battery includes an electrode core and a current collector. The electrode core is formed in a cylindrical shape. A tab welding region is arranged on at least one side of the electrode core along an axial direction of the electrode core. The current collector is adapted to weld to the tab welding region. An outer ring region, a middle ring region, and an inner ring region are arranged on the current collector from outside to inside along a direction parallel to a radial direction of the electrode core. The middle ring region is located between the outer ring region and the inner ring region. A first weld pattern is arranged in the middle ring region. A second weld pattern is arranged in at least one of the inner ring region or the outer ring region. The first weld pattern extends along the radial direction of the electrode core. The second weld pattern extends along a circumferential direction of the electrode core. The current collector is welded to the tab welding region through the first weld pattern and the second weld pattern. According to the cylindrical battery in embodiments of the present disclosure, the current collector is welded to the tab welding region, and quality of the welding can also be ensured, thereby avoiding poor welding or over welding to a certain extent, and improving performance of the cylindrical battery.