Aluminum electrolytic capacitor safety fireproof cover

Abstract

The invention belongs to the technical field of aluminum electrolytic capacitors, and discloses an aluminum electrolytic capacitor safety fireproof cover; the aluminum electrolytic capacitor safety fireproof cover comprises a sleeve used for sleeving an aluminum electrolytic capacitor, and a buffer cap used for flame retardance is arranged at one end of the sleeve, wherein the buffer cap is fixedly connected with the sleeve and is integrally formed; the inner wall of the buffer cap and the top end of the aluminum electrolytic capacitor sleeved in the sleeve form a closed cylindrical pressure relief space; a pressure relief hole used for gas release is formed in the end plane of one end, in the 2mm position of the axial central line of the buffer cap, of the buffer cap, and the pressure relief hole penetrates through the buffer cap, wherein two buckling parts are symmetrically arranged at the two sides of one end of the sleeve position, and are used for being clamped with an external PCB. The aluminum electrolytic capacitor safety fireproof cover is simple in design, the structure is reasonable, the possibility of electrolyte splashing, sparking and burning accidents when the liquid-state capacitor explosion-proof valve is operated can be reduced, and the safety performance of the product is improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolytic capacitors, in particular to a safety fireproof cover for aluminum electrolytic capacitors. Background technique [0002] The aluminum electrolytic capacitor is made of an aluminum cylinder as the negative electrode, which is filled with a liquid electrolyte, and a curved aluminum strip is inserted as the positive electrode. After the DC voltage treatment, a layer of oxide film is formed on the positive electrode as the medium. The aluminum electrolytic capacitor has The advantages of large monomer capacity and low production cost are suitable for power filtering or low-frequency circuits. For electrolytic capacitor products with a diameter above φ13mm, explosion-proof devices are required, such as explosion-proof valves or explosion-proof holes. Most aluminum electrolytic capacitors are explosion-proof The devices are all arranged on the aluminum shell, such as designing explosion-p...

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Problems solved by technology

[0003] However, in the prior art, aluminum electrolytic capacitors with a general size of φ13mm or more, especially when the high-voltage capacitors are subjected to abnormal currents and voltages in the circuit, will also have internal instantaneous short-circuit breakdown and ignition, which may ignite the electrolytic paper. or external equipment to cause the risk of fire, and the direct injection of electrolyte and gas caused by the valve opening action of the aluminum electrolytic capacitor also has the risk of damaging external electronic equipment. In summary, a safety fire cover is designed to solve the problem of breakdown and fire risk of ignition caused by fire, it is necessary

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