Patent ID: 9583264
Date: 2017-02-28
CPC Classifications: H01G,H02M,Y02T

Claim:
1. A capacitor device, comprising: a film capacitor element that comprises a coiled body in which an insulating layer and an electrification layer are laminated and wound together, and a pair of collector electrodes that are formed upon two opposite end faces of the coiled body; a case that comprises a capacitor housing portion within which the film capacitor element is received; a pair of inserts having insulation properties, one of which is inserted between one of the pair of collector electrodes and one of inner walls of the capacitor housing portion; and a mass of sealing and insulating material that is charged between the film capacitor element and the one of the inner walls of the capacitor housing portion, wherein: the inner walls of the capacitor housing portion include a pair of mutually opposing inner walls, each of which confronts one of the pair of collector electrodes; each of the pair of inserts is inserted between one of the pair of mutually opposing inner walls and corresponding one of the pair of collector electrodes, and has an electrode side facing surface that confronts the corresponding one of the pair of collector electrodes and a case side facing surface that confronts the one of the pair of mutually opposing inner walls; on the electrode side facing surface, there are provided electrode side contact portions that contact the corresponding one of the pair of collector electrodes and electrode side isolated portions that are separated from the corresponding one of the pair of collector electrodes; on the case side facing surface, there are provided case side contact portions that contact the one of the pair of mutually opposing inner walls and case side isolated portions that are separated from the one of the pair of mutually opposing inner walls; the sealing and insulating material is charged between the corresponding one of the pair of collector electrodes and the electrode side isolated portions, and between the one of the pair of opposing inner walls and the case side isolated portions; the case is formed in a shape of a box having a bottom but no lid, and an aperture for receiving the film capacitor and the pair of inserts is formed in an upper portion of the capacitor housing portion; the one of the pair of mutually opposing inner walls is a wall portion that is inclined inwards in a tapered shape so as to become narrower in a direction from the aperture towards a bottom surface of the capacitor housing portion; and the each of the pair of inserts is formed in a tapered shape in the direction from the aperture towards the bottom surface of the capacitor housing portion, so that it becomes thinner along a thickness direction of the corresponding one of the pair of collector electrodes.