Capacitor and method of connecting the same

Abstract

A large capacity capacitor of which driving electrolyte does not leak to the outside even when used in high-temperature, high-humidity conditions. A capacitor has a hollow capacitor element (1) constructed by rolling a pair of flat plate-like electrodes (2a, 2b) with a separator (4) in between, a bottomed tubular metallic case (5) for receiving the capacitor element (1) together with a driving electrolyte, and a sealing plate (7), with external connection terminals (8), for sealing the opening of the metallic case (5). A rubber-like elastic body (9) is provided on the peripheral edge of a surface of the sealing plate (7), an electric insulation layer (6) covering at least portion from an opening edge of the metallic case (5) to a recess (5b) for fixing the sealing plate (7) is provided, and the elastic body (9) is pressed at the opening edge portion of the metallic case (5).

Description

technical field [0001] The present invention relates to capacitors of high capacitance used in various electronic devices and methods of connecting such capacitors. Background technique [0002] has been proposed, for example in Figure 18 and 19 The electric double-layer capacitor thus constructed as shown in is used as a capacitor with large capacitance. like Figure 18 As shown, in the electric double layer capacitor, the capacitor element 31 is accommodated in a metal case 36 with a closed bottom, and after injecting the driving electrolyte into the capacitive element 31, the capacitor element 31 is put into the metal case with a closed bottom 36, and the opening part is sealed by the opening sealing assembly 37. The outside of the metal case 36 is covered with a cover 38 made of synthetic resin. [0003] like Figure 19 As shown, in the capacitor element 31, sheet-like polarizable electrodes 32a and 33a each formed by mixing and stirring together, for example, activ...

AI Technical Summary

Problems solved by technology

[0017] The acid component that drives the electrolyte moves along the inner surface of the metal case, and deteriorates the rubber portion that is in contact with the open end portion, so that the sealing performance is reduced

[0018] When the driving electrolyte leaks to the outside in this way, this situation not only causes a problem of shortening the life of the capacitor, but also causes a problem that when the driving electrolyte is deposited on the positive and negative parts of the wiring pattern of the printed circuit board in a bridging manner, due to leakage to The external driving electrolyte has ion-conducting properties and causes the failure of the circuit

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