Welding method for double core bags of thin film capacitor

Abstract

The invention relates to a welding method for double core bags of a thin film capacitor. The method includes following steps: welding a first copper bar and a second copper bar on a cover plate; welding the first copper bar on an upper end face of a first core bag connected with a third copper bar, and covering with the cover plate to enable the second copper bar and the third copper bar to be kept outside the first core bag; welding the second copper bar on a lower end face of the first core bag; connecting an upper end face of a second core bag with the upper end face of the first core bag mutually through a fourth copper bar and superposing the second core bag on the first core bag; welding the third copper bar on a lower end face of the second core bag; and armoring and encapsulating the superposed first core bag and the second core bag. The double core bags are parallelly welded, so that capacity of the double core bags is twice that of a single core bag and is more stable.

Description

technical field [0001] The invention relates to the technical field of capacitor production, in particular to a double-core wrapping welding method for a film capacitor. Background technique [0002] At home and abroad, electrolytic capacitors have been widely used in frequency converters, wind power generation, and power locomotives because of their high specific volume ratio, light size, and easy installation. However, their shortcomings, such as low voltage and large leakage current , The service life can only be thousands of hours, etc., which is also a headache for engineers and technicians. [0003] Then our film capacitors just make up for the lack of electrolytic capacitors. Film capacitors use plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate as the medium, and form nano-scale capacitors on the dielectric film by vacuum sputtering. A capacitor with a cylindrical structure in which the metal layers are used as electrodes and are stacked...

AI Technical Summary

Problems solved by technology

However, due to the influence of the equipment capacity of the film winding machine, the capacity of the single core package is limited, which leads to the limitation of its application field

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