Battery Cell Welding Fixture With Shielding Gas Slag Control
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Solution Overview
Problem
Welding slag easily falls into the interior of battery cells during the welding of a tab and a terminal post, affecting the quality of welding and posing a risk of short circuits.
Innovation Solution
A welding fixture with a pressure plate featuring a clearance through hole and a gas guide channel is used to deliver shielding gas, controlling welding slag and improving weld seam quality by guiding the gas into the through hole to remove slag and reduce its entry into the battery cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If welding is performed on the tab and terminal post without additional protective measures, then the welding process can be completed, but welding slag falls into the battery cell interior affecting welding quality
Solution Approach 1:
A gas guide channel is introduced as an intermediary component within the pressure plate to deliver shielding gas directly to the welding region. This mediator protects the welding area from slag contamination by creating a protective gas barrier, thereby improving welding quality without interfering with the welding process itself
Solution Approach 2:
Shielding gas is used to create an inert atmosphere around the welding region through the gas guide channel. This inert environment prevents welding slag from contaminating the battery cell interior by directing the gas flow to control spatter and remove slag from the welding area
2Manufacturing precision
If a pressure plate is added to control welding slag, then welding quality improves, but the device structure becomes more complex
Solution Approach 1:
The gas guide channel is merged into the pressure plate structure, combining two functions (pressing and gas delivery) into a single integrated component. This reduces overall device complexity while maintaining the ability to control welding slag and improve welding quality
Solution Approach 2:
The pressure plate is designed with multi-functionality: it provides mechanical pressing force to hold the tab and terminal post together, while simultaneously serving as a conduit for shielding gas delivery through the integrated gas guide channel. This universal design improves welding quality without requiring separate dedicated components
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 solution effectively reduces the presence of welding slag within the battery cell, enhancing welding quality and preventing short circuits by controlling slag spatter and improving weld seam integrity.
Implementation Method 1
the gas guide channel communicates with the clearance through hole to guide shielding gas into the clearance through hole
Implementation Method 2
the shielding gas enters the clearance through hole along the gas guide channel, so that spatter of welding slag at the to-be-welded region between the terminal post and the tab can be controlled, and welding slag on the terminal post and the tab can be removed
Data Source
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AI summary
A welding fixture and a welding device including same. The welding fixture includes: a fixing base, the fixing base being configured to fix a battery cell; and at least one pressure plate, the pressure plate being detachably fixed to the fixing base, and being configured to press a tab of the battery cell against a terminal post. The pressure plate is provided with a clearance through hole and a gas guide channel. The clearance through hole is disposed opposite to a to-be-welded region between the tab and the terminal post. The gas guide channel communicates with the clearance through hole to guide shielding gas into the clearance through hole. In the technical solution in embodiments of the present application, the welding fixture according to the embodiments of the present application has advantages such as controlling spatter of welding slag at the to-be-welded region between the terminal post and the tab and removing welding slag on the terminal post and the tab, to reduce welding slag remaining in the to-be-welded region between the terminal post and the tab, thereby reducing a possibility that welding slag enters the interior of the battery cell and improving the quality of welding.