Capacitor with outgoing line and welding sealing process thereof

Abstract

The invention relates to a capacitor with an outgoing line structure. The capacitor comprises a capacitor shell and a core arranged in the capacitor shell, outgoing lines are respectively welded on two poles of the core, and the outgoing line is provided with a plastic insulation protection layer. The capacitor with an outgoing line structure is characterized by further comprising a plastic packaging cover; the plastic packaging cover is provided with a through hole for the outgoing line to penetrate through, and the through hole integrally extends outwards to form an outgoing pipe. The plastic packaging cover is arranged on the capacitor shell, and the outgoing line penetrates through the outgoing pipe; and the part of the plastic insulation protection layer of the outgoing line, which penetrates into the outgoing pipe, is hermetically connected with the outgoing pipe in an ultrasonic welding manner. The invention also provides a welding sealing process realized by the capacitor withthe outgoing line structure. The product has the characteristics of being good in sealing effect, simple in structure, stable in product quality and efficient and convenient to produce and manufacture.

Description

technical field [0001] The invention relates to a capacitor, in particular to a capacitor with lead wires and its welding and sealing process. Background technique [0002] Existing capacitors with lead wire structures generally include the following three types: [0003] The first one is to weld the lead-out wires of the core set in the capacitor case to the two terminals, and then lead the outer lead-out wires out of the terminals by welding; use epoxy resin, polyurethane, etc. Resin potting, the purpose of resin potting is: (1) to seal and protect the electrical components such as the core in the capacitor case, (2) to fix the lead-out wire and seal the outer edge of the lead-out wire (plastic insulation protection layer) Protect. [0004] The above-mentioned first method has the following defects: [0005] a) The curing time of resin potting such as epoxy resin and polyurethane is relatively long, and the process is relatively complicated, resulting in a decrease in p...

AI Technical Summary

Problems solved by technology

[0013] a) The seal between the resin and the plastic insulating protective layer on the outer edge of the lead wire is not reliable (the thermal fusion temperature between the two different materials, the resin and the plastic insulating protective layer of the lead wire, is different), and in some working environments (special temperature Thermal expansion and contraction under conditions) or with the swinging and pulling of the lead-out wire, the resin and the plastic insulating protective layer of the lead-out wire are easily separated after external factors such as stress, and the sealing effect cannot meet the requirements

[0014] As mentioned above, the existing capacitors with lead-out wires all have certain hidden dangers of sealing. Due to the existence of hidden dangers, problems such as leakage of liquid inside the capacitor and intrusion of external water vapor will often be caused, resulting in high scrap rate of capacitors, low service life, and poor quality. Without effective protection, the service life of the capacitor cannot meet the expected effect and requirements

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