Patent ID: 11935696
Assignee: NUINTEK CO LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A capacitor with an insert injection metal-plastic dual-material case, the capacitor comprising:
a capacitor module including a capacitor device formed by winding a dielectric film and having thermally-sprayed surfaces on both sides, a first busbar electrically connected with a thermally-sprayed surface of the capacitor device and having a first lead terminal on an exposed side, a second busbar electrically connected with the other thermally-sprayed surface of the capacitor device and having a second lead terminal on an exposed side, and an insulating sheet disposed between the first busbar and the second busbar to insulate an overlap region;
a plastic case having a 3D space formed by four sides and a bottom to accommodate the capacitor module and having an open top;
a metallic external wall is formed outside one side of the four sides or the bottom of the plastic case; and
a filler permeating in a gel or fluid state into the space between the capacitor module and inner walls of the plastic case, and then hardened therein, thereby filling up the space,
wherein an inner wall of the plastic case that is in contact with the metallic external wall forms one dual-material wall,
wherein the metallic external wall and the plastic case are integrated through insert injection, and
wherein the metallic external wall has a plastic filling hole having a wide outer side and a narrow inner side, and the plastic case inner wall includes expanding protrusions formed by filling the first filling hole with plastic resin and having an inside-narrow and outside-wide shape of which the width increases outward from the inside.