Electric double layer capacitor having low esr, and assembly method therefor

Abstract

The present invention relates to an electric double layer capacitor having a low ESR, and an assembly method therefor. According to the present invention, the electric double layer capacitor comprises: a wound element having a first exposed current collector portion and a second exposed current collector portion; a metallic housing in which the wound element is accommodated so that the first exposed current collector portion is joined to the lower side of the metallic housing to be connected thereto, and having one pair of first through-holes on the upper side thereof; an insulating member arranged inside the metallic housing so as to be located on the upper side of the second exposed current collector portion of the wound element; a first external terminal electrically connected to the first exposed current collector portion of the wound element and to the metallic housing by being inserted into, joined and connected to one of the one pair of first through-holes of the metallic housing; and a second external terminal arranged on the lower side of the insulating member and joined to the second exposed current collector portion of the wound element so as to be electrically connected thereto, and inserted into the other one of the one pair of first through-holes of the metallic housing and caulked so as to be insulated by the insulating member.

Description

technical field [0001] The present invention relates to a low ESR (equivalent series resistance, equivalent serial resistance) electric double layer capacitor (electric double layer capacitor) and its assembly method, and relates in more detail to a low ESR electric double layer capacitor and its assembly method, which utilizes only deformation (cogging) and laser welding are assembled in such a way that the first external terminal and the second external terminal are connected to the wound element contained in the metal housing (housing), so that the assembly operation is easy. Background technique [0002] Electric Double Layer Capacitors (EDLC; Electric Double Layer Capacitor) store electrical energy by using reversible physical adsorption phenomenon, so that even if repeated charging and discharging have a small impact on life, it is suitable for smartphones, hybrids The field of energy storage devices used in automobiles, electric vehicles or solar power generation. ...

AI Technical Summary

Problems solved by technology

Since a separate space is required for the internal terminals, the outer cover of the conventional electric double layer capacitor is larger than that of the winding element, and the problem is that the external shape of the electric double layer capacitor is large relative to the capacity as a whole, and the winding element is connected to the internal terminal. When the contact area is small, the ESR increases, and the problem is that the reliability of the electrical characteristics of the electric double-layer capacitor is reduced, and the winding element is connected to the external terminal through the internal terminal, and thus the problem is that it is difficult to perform the electric double-layer capacitor assembly work

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