Patent ID: 8310812
Filing Date: 2012-11-13
Classification: H01G,Y02E

Abstract:
1. An electric double layer capacitor comprising: an element including: a first terminal connected to the first lead section and a second terminal connected to the second lead section; an electrolyte impregnated in the element; a resin-made case accommodating the element, and having an inner bottom, a first surface facing the inner bottom, and a side surface adjacent to the first surface, the first surface being opened; and a resin-made lid bonded to the first surface of the case, wherein the first terminal has a first joint including a first joint surface to which the first lead section is joined, a first intermediate conductive section extended from the first joint, and a first terminal section further extended from the first intermediate conductive section, the second terminal has a second joint including a second joint surface to which the second lead section is joined, a second intermediate conductive section extended from the second joint, and a second terminal section further extended from the second intermediate conductive section, the first and second joints are disposed at positions closer to the first surface than the inner bottom of the case, the first and second joint surfaces are exposed toward the first surface, the rims of the first and second joints and the first and second intermediate conductive sections are buried in the case, and the first and second terminal sections are led from the side surface of the case to outside, wherein the first electrode is one of a plurality of first electrodes, the second electrode is one of a plurality of second electrodes, the element has the plurality of first electrodes and the plurality of second electrodes, and the first electrodes and the second electrodes are stacked on each other through the separator, each of the first electrodes has: each of the second electrodes has: the separator has a band shape and is folded in a zigzag shape to form a plurality of continuous sheets, the first electrodes and the second electrodes are alternately inserted between the sheets of the separator from the opposite directions, and the first lead sections and second lead sections are arranged at the opposite ends of a same side of the element, and wherein in two of the second electrodes positioned on an uppermost and a lowermost in the stacking direction, the polarized electrode layer is formed on only one surface of the current collector except the second lead section, and the polarized electrode layers of the second electrodes positioned on the uppermost and the lowermost are in contact with the sheets of the separator positioned on the uppermost and the lowermost, respectively.