Low-loss square capacitor

Abstract

The invention discloses a low-loss square capacitor, which comprises a core cladding, an aluminum shell and an aluminum cover used for sealing the core cladding in the aluminum shell. The core cladding comprises positive electrode foil, negative electrode foil, electrolytic paper arranged between the positive electrode foil and the negative electrode foil, a positive electrode lead wire connectedwith the positive electrode foil, and a negative electrode lead wire connected with the negative electrode foil. The positive electrode lead wire and the negative electrode lead wire penetrate the aluminum cover and extend out of the aluminum cover. The core cladding is a laminated core cladding. The positive electrode foil and the negative electrode foil are sintered foil, a plurality of laminated positive electrode tabs are arranged on the positive electrode foil, and a plurality of laminated negative electrode tabs are arranged on the negative electrode foil. A positive electrode welding region used for welding the plurality of positive electrode tabs with the positive electrode lead wire is reserved on the outer surface of each positive electrode tab. A negative electrode welding region used for welding the plurality of negative electrode tabs with the negative electrode lead wire is reserved on the outer surface of each negative electrode tab. The low-loss square capacitor disclosed by the invention has the advantages of compact structure, high impregnation efficiency, small ESR value, and fully utilized internal space.

Description

technical field [0001] The invention relates to the field of capacitors, in particular to a low-loss square capacitor. Background technique [0002] like figure 1 and figure 2 As shown, the current square capacitor is formed by winding the positive and negative electrode foils together with the electrolytic paper, and the electrolytic paper is located in the middle of the positive and negative electrode foils. The positive and negative electrode foils are riveted with lead-out guide pins, and the core formed after winding is wrapped in a conductive electrolyte, and then the positive electrode guide pin 1 and negative electrode guide pin 2 of the electrolyte-impregnated core package are passed through the rubber plug and the aluminum plug. The cover 3 forms a group solid, which is put into the aluminum shell 4, and then the edge gap between the aluminum cover and the aluminum shell is welded by laser, and the reserved groove on the aluminum cover is sealed with glue, there...

AI Technical Summary

Problems solved by technology

[0005] The low-loss square capacitor proposed by the present invention aims to solve the technical problem that the winding layers of the existing square capacitor cannot be tightly bonded, resulting in a large loss of the product

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