Battery Welding Jig With Pressing Portion to Block Spatter
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Solution Overview
Problem
During the welding process in cylindrical type secondary batteries, spatter is introduced into the battery can, deteriorating the weld quality and overall battery quality due to improper contact between the collector plate and the beading part.
Innovation Solution
A jig for welding is designed with a protrusion and pressing portion that presses the objects to be welded, featuring a narrowing welding hole and shielding gas inlet to prevent spatter and enhance welding force, ensuring proper contact and improved weld quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If welding is performed inside the battery can body, then the welding process can be completed in situ, but spatter is introduced into the can body deteriorating weld quality and battery quality
Solution Approach 1:
A jig is introduced as an intermediary device to perform the welding operation. The jig includes a pressing portion that applies pressure to ensure proper contact between the collector plate and beading part, and a shielding gas inlet that prevents spatter from contaminating the battery can body during welding. This mediator enables the welding process to be completed while protecting against harmful spatter effects.
2Reliability
If the beading part is not flat or the collector plate is in poor contact with the beading part, then the welding cannot be properly carried out, but weld quality and battery quality deteriorate
Solution Approach 1:
The pressing portion of the jig performs preliminary action by applying pressure to the collector plate and beading part before and during the welding process. This pre-compression ensures proper contact between the welding surfaces, correcting any flatness issues or poor contact conditions before the welding arc is established, thereby ensuring reliable welding execution and high weld quality.
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 jig effectively prevents spatter introduction and enhances welding quality by increasing the welding force between the collector plate and beading part, improving the completion of the welding process.
Implementation Method 1
a welding hole through which laser that performs the welding passes is defined
Implementation Method 2
the protrusion includes a pressing portion that is provided in a peripheral part of the welding hole and presses an object to be welded in the secondary battery
Data Source
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AI summary
The present invention relates to a jig for welding that is capable of preventing spatter, which is foreign matter caused by welding, from being introduced into a secondary battery during welding between a collector plate connected to an electrode assembly in a secondary battery can body and a beading part that is a portion recessed inward from the can body, and is capable of improving quality of the welding by increasing a welding force between the collector plate and the beading part, which are objects to be welded, to increase a degree of completion of the welding. The jig for welding according to the present invention relates to a jig for welding, which is used in a welding process during manufacturing of a secondary battery, and includes a body part, and a protrusion that extends downward from a bottom surface of the body part, has a size corresponding to a top opening of the secondary battery, and is inserted into the top opening of the secondary battery in the welding process, wherein a welding hole through which laser that performs the welding passes is defined in each of a circumferential portion of the protrusion and a region of the body part, which corresponds to a circumferential portion of the protrusion, wherein the protrusion includes a pressing portion that is provided in a peripheral part of the welding hole and presses an object to be welded in the secondary battery.