Capacitor for high <i>g</i>-force applications

摘要

An electrolytic capacitor capable of operating at 75 g or greater is provided having a case with a base and a lid, with a wound capacitor element positioned on its side, lengthwise along the bottom of the base and with the underside of the lid pressed against the length of the capacitor element, to frictionally engage the capacitor element. The case is provided with inwardly projecting surfaces, including a bulkhead at one end of the capacitor element and ridges on the lid, which function as barriers to restrict movement of the capacitor element within the case. A compartment is created at one end of the case, to allow space for terminals, which are embedded in a non-conductive support matrix.

主权项

1. An electrolytic capacitor, comprising:
(a) a case comprising (i) a base having an interior and an exterior, a bottom, a first side wall and a second side wall opposite the first side wall, a back wall and a front wall opposite the back wall, and (ii) a lid having a rim and an underside, wherein the lid overlays the interior of the base and is parallel to the bottom of the base, and wherein the rim of the lid is attached to the base to create a seal therewith; (b) a wound capacitor element, having an anode, a cathode and a dielectric layer, wherein the capacitor element is characterized by a width, a height, and a length, the capacitor element further having a first end and a second end opposite the first end, and a first tab and a second tab connected to the anode and cathode, respectively, whereby the capacitor element is positioned inside the case with the first end of the capacitor element facing the front wall of the base and the second end of the capacitor element facing the back wall of the base, and the underside of the lid and the bottom of the base are in contact with the capacitor element along its length with sufficient pressure to frictionally engage the capacitor element and resist the capacitor elements lengthwise movement relative to the case, and whereby a compartment is created within the case between the first end of the capacitor element and the front wall of the base, and the first and second tabs extend into the compartment; (c) a first terminal having a first end positioned in the compartment and connected to the first tab of the capacitor element and a second end extending through a first hole in the case; (d) a first hermetic seal attached to the exterior of the case and surrounding the first hole in the case, wherein the second end of the first terminal extends through the first hermetic seal and is electrically insulated from the case; (e) a second terminal having a first end positioned in the compartment and connected to the second tab of the capacitor element and a second end extending through a second hole in the case; (f) a second hermetic seal attached to the exterior of the case and surrounding the second hole in the case, wherein the second end of the second terminal extends through the second hermetic seal and is electrically insulated from the case; and (g) an electrolyte solution contained in the case and in contact with the capacitor element.