Cylindrical Battery Welding Jig for Collector Plate Alignment
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Solution Overview
Problem
Conventional welding jigs for cylindrical battery cells fail to accurately align the collector plate with the electrode assembly, leading to welding defects and reduced stability due to misalignment during the welding process.
Innovation Solution
A jig with a main body and position determination portions that press and fix the collector plate at the correct position, ensuring alignment with the electrode assembly during welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional welding jig is used to weld the collector plate to the battery can, then the welding process can be performed, but the collector plate moves left and right during pressing, causing misalignment between the collector plate center and electrode assembly center, resulting in welding defects
Solution Approach 1:
The patent applies preliminary action by providing position determination portions that pre-position the collector plate before welding occurs. These portions contact the battery can at specific locations to establish the correct position of the collector plate in advance, preventing movement during the welding process and ensuring accurate alignment with the electrode assembly.
Solution Approach 2:
The patent uses position determination portions as intermediary elements between the welding jig and the battery can. These portions act as mediators that transfer and establish the correct positional relationship, ensuring the collector plate is accurately positioned relative to the electrode assembly through indirect contact points on the battery can.
2Ease of operation
If the collector plate is pressed by the welding jig without position determination, then the welding operation can proceed, but the collector plate cannot be fixed at the correct position, leading to welding defects
Solution Approach 1:
The welding jig is segmented into distinct functional components: a pressing portion that applies force to the collector plate and separate position determination portions that establish correct positioning. This segmentation allows the pressing and positioning functions to work independently and simultaneously, maintaining operational simplicity while achieving high positioning accuracy through dedicated structural elements.
Data Source
AI summary
A jig used for welding a cylindrical battery, which is a jig for welding a collector plate electrically connected to an electrode assembly of a cylindrical battery cell to a battery can, may include: a main body configured to come into contact with the collector plate to press the collector plate and having a through-hole for welding; and a position determination portion coupled to at least one of both ends of the main body to come into contact with an end of the collector plate, and configured to cause the collector plate to be fixed at a correct position during welding. A method of manufacturing a cylindrical battery and cylindrical battery made by the method are also provided.