Battery Tab Pressing Block With Avoidance Space for Cleaner Welding
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Solution Overview
Problem
The welding quality between the tabs of electrode assemblies and adapting pieces in battery production is critical but often compromised by premature pressing, indentation, or damage during the welding process, leading to reduced production quality.
Innovation Solution
A welding positioning apparatus with a pressing block featuring a pressing surface and an avoidance space accommodates the tab not requiring immediate welding, reducing the risk of damage and improving the welding quality by preventing premature pressing and dust adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pressing block presses the tab during welding process, then the welding quality is improved, but the tab may be subjected to premature pressing forces causing indentations or damage
Solution Approach 1:
The pressing block is segmented into multiple pressing surfaces, with the first pressing surface dedicated to pressing the tab requiring welding and the second pressing surface positioned to avoid pressing the tab not requiring welding. This segmentation allows selective pressing of only the necessary tab portion, preventing damage to other tabs while maintaining welding quality.
Solution Approach 2:
Different regions of the pressing block are designed with different functions: the first pressing surface provides pressing force for welding quality, while the second pressing surface region is designed to avoid contact with non-welded tabs. This local differentiation ensures that pressing forces are applied only where needed, preventing premature damage to tabs not requiring welding.
2Productivity
If the pressing block accommodates multiple tabs, then the productivity is improved, but the tabs not requiring welding may be subjected to harmful factors like dust adhesion
Solution Approach 1:
The harmful factor of dust adhesion is extracted and isolated by positioning the second pressing surface away from the welding zone. The pressing block design separates the function of holding multiple tabs from the function of applying pressing force, allowing non-welded tabs to be accommodated without exposing them to dust and harmful factors generated during welding.
3Measurement precision
If the pressing block uses vacuum adsorption to hold the tab, then the positioning precision is improved, but the tab may be lifted or bent after disengagement
Solution Approach 1:
The pressing block uses segmented pressing surfaces where the first pressing surface provides vacuum adsorption for precise positioning of the tab requiring welding, while the second pressing surface is positioned to avoid contact with tabs not requiring welding. This prevents the lifting and bending issues that occur when vacuum adsorption is applied to tabs that will not be welded.
Solution Approach 2:
The design anticipates and prevents the harmful effect of tab lifting and bending by positioning the second pressing surface to avoid non-welded tabs. This preliminary anti-action ensures that tabs not requiring welding are not subjected to vacuum adsorption forces that could cause shape deformation after disengagement.
Data Source
AI summary
A welding positioning apparatus includes a carrier and a pressing module. The carrier includes a pressing region and placement regions, where the pressing region is formed between two placement regions spaced apart along a first direction. The pressing module includes a pressing block and a driving apparatus, where the driving apparatus is drivingly connected to the pressing block to drive the pressing block to move toward the pressing region along a second direction. A side of the pressing block facing the pressing region is provided with a pressing surface and an avoidance space. The pressing surface is configured to press a portion of a tab of an electrode assembly along the second direction. The avoidance space is located on a side of the pressing surface along the first direction and is open on a side facing the pressing region.