Abstract: An electrochemical device includes a first electrode, a second electrode, a separator interposed between the first electrode and the second electrode, an electrolyte, a lead terminal electrically connected to one electrode of the first electrode and the second electrode, and a protection tape covering the lead terminal. The one electrode includes a current collecting foil and a mixture layer provided on the current collecting foil. The current collecting foil has a first region covered with the mixture layer, and a second region not covered with the mixture layer and exposing a surface of the current collecting foil. The protection tape is allowed to adhere to the lead terminal provided at the second region of the current collecting foil, and to at least a portion of a third region which is a part of the second region and not covered with the lead terminal.

Abstract: In an electric storage device, a terminal plate includes an element-connecting part electrically connected to a first electrode at a first end of an electric storage element, and an external terminal connected to this element-connecting part. A sealing member is on the element-connecting part, and includes a hole where the external terminal is inserted. The sealing member and the external terminal seal an opening of an outer jacket. The external terminal includes a tapered part on its outer periphery at a tip, and is partially exposed from the sealing member. The tapered part includes a first end and a second end farther away from the element-connecting part than the first end. An edge of a side wall at the opening of the outer jacket is between the first and second ends of the tapered part in a first direction extending from the bottom to the opening of the outer jacket.

Abstract: In an electric storage device, a terminal plate includes an element-connecting part electrically connected to a first electrode at a first end of an electric storage element, and an external terminal connected to this element-connecting part. A sealing member is on the element-connecting part, and includes a hole where the external terminal is inserted. The sealing member and the external terminal seal an opening of an outer jacket. The external terminal includes a tapered part on its outer periphery at a tip, and is partially exposed from the sealing member. The tapered part includes a first end and a second end farther away from the element-connecting part than the first end. An edge of a side wall at the opening of the outer jacket is between the first and second ends of the tapered part in a first direction extending from the bottom to the opening of the outer jacket.

Abstract: A capacitor includes a capacitor element, a collector plate joined to an electrode of the capacitor element, and a case accommodating the capacitor element and the collector plate. An inner surface of a bottom plate of the case has a contacting portion contacting the collector plate and a junction portion facing the collector plate. The junction portion of the inner surface of the bottom plate has a joining point joined to the collector plate and a separation part facing the collector plate around the joining point by a gap between the junction portion and the collector plate. The collector plate is located away from the contacting portion.

Abstract: A capacitor has a capacitor element, an electrolyte, a cylindrical case made of metal and having a bottom, a metal terminal plate, and a sealing rubber. The terminal plate has a body portion and a flange portion projected from an outer peripheral surface of the body portion toward the case. The sealing rubber is abutted onto the flange portion of the terminal plate, and is interposed between the outer peripheral surface of the body portion of the terminal plate and a side surface of the case for sealing the case. The case has a drawn and grooved portion formed by being drawn and thus grooved from an outside of the side surface at a place so that the sealing rubber is compressed between the outer peripheral surface of the body portion of the terminal plate and the case. Then, a ring-like groove is provided on the outer peripheral surface of the body portion of the terminal plate at a portion, which is padded with the sealing rubber, the sealing rubber is projected into the groove.

Abstract: A capacitor includes a capacitor element, a collector plate joined to an electrode of the capacitor element, and a case accommodating the capacitor element and the collector plate. An inner surface of a bottom plate of the case has a contacting portion contacting the collector plate and a junction portion facing the collector plate. The junction portion of the inner surface of the bottom plate has a joining point joined to the collector plate and a separation part facing the collector plate around the joining point by a gap between the junction portion and the collector plate. The collector plate is located away from the contacting portion.

Abstract: A pressure regulating valve is provided on a terminal plate of a capacitor. This pressure regulating valve includes a gas permeable sheet, a valve body made of silicone rubber, a packing, and a cap. The gas permeable sheet that prevents permeation of electrolyte is provided so as to close a hole created in the terminal plate. The packing is interposed between the valve body and the gas permeable sheet, and is made of an elastic material with moisture permeation resistance higher than that of silicone rubber. The cap is fixed onto the terminal plate and covers the valve body and the packing such that the valve body and the packing are retained in a compressed state with respect to the terminal plate. The valve body and the packing are provided away from the gas permeable sheet.

Abstract: A capacitor includes a capacitor element including first and second electrodes, an electrolyte solution, first and second collector plates made of metal and joined to the first and second electrodes of the capacitor element, respectively, a case accommodating the capacitor element, the electrolyte solution, the first and second collector plates, a terminal plate placed at an opening of the case and joined to the second collector plate, and a sealing rubber sealing the terminal plate and the opening of the case. The case has a tubular portion and a bottom plate closing the tubular portion. An inner surface of the bottom plate of the case has a contacting portion contacting the first collector plate and a junction portion facing the first collector plate.

Abstract: A capacitor has a capacitor element, an electrolyte, a cylindrical case made of metal and having a bottom, a metal terminal plate, and a sealing rubber. The terminal plate has a body portion and a flange portion projected from an outer peripheral surface of the body portion toward the case. The sealing rubber is abutted onto the flange portion of the terminal plate, and is interposed between the outer peripheral surface of the body portion of the terminal plate and a side surface of the case for sealing the case. The case has a drawn and grooved portion formed by being drawn and thus grooved from an outside of the side surface at a place so that the sealing rubber is compressed between the outer peripheral surface of the body portion of the terminal plate and the case. Then, a ring-like groove is provided on the outer peripheral surface of the body portion of the terminal plate at a portion, which is padded with the sealing rubber, the sealing rubber is projected into the groove.

Abstract: A pressure control valve provided on a terminal plate of a capacitor includes a filter, a valve body and a cap. The filter is provided so as to close a through-hole disposed in a terminal plate and is composed of a gas permeable sheet preventing permeation of the electrolyte solution. The valve body is formed of an elastic material, has a cylindrical part and a bottom part, and is disposed so that the bottom part covers the through-hole of the terminal plate. The cap is fixed to the terminal plate, covers the valve body, and holds the valve body in a composed state with respect to the terminal plate. The cap is provided with a vent hole. The valve body and the filter are spaced apart from each other.

Abstract: A pressure control valve provided on a terminal plate of a capacitor includes a filter, a valve body and a cap. The filter is provided so as to close a through-hole disposed in a terminal plate and is composed of a gas permeable sheet preventing permeation of the electrolyte solution. The valve body formed of an elastic material has a cylindrical part and a bottom part, and is disposed so that the bottom part covers the through-hole of the terminal plate. The cap is fixed to the terminal plate, covers the valve body and holds the valve body in a composed state with respect to the terminal plate. The cap is provided with a vent hole. The valve body and the filter are provided apart from each other.

Abstract: A capacitor includes a metal case and a terminal plate. The metal case accommodates a capacitor element together with a driving electrolyte and is joined to one of the electrodes of the capacitor element at its inner bottom surface. The terminal plate is joined to the other electrode at its inner surface so as to seal the opening of the metal case. The terminal plate is provided with a pressure regulating valve also functioning as a driving-electrolyte filling hole. The pressure regulating valve includes a ring-shaped elastic member which is pressed into the wall formed on the terminal plate.

Abstract: A capacitor includes a capacitor element including first and second electrodes, an electrolyte solution, first and second collector plates made of metal and joined to the first and second electrodes of the capacitor element, respectively, a case accommodating the capacitor element, the electrolyte solution, the first and second collector plates, a terminal plate placed at an opening of the case and joined to the second collector plate, and a sealing rubber sealing the terminal plate and the opening of the case. The case has a tubular portion and a bottom plate closing the tubular portion. An inner surface of the bottom plate of the case has a contacting portion contacting the first collector plate and a junction portion facing the first collector plate.

Abstract: A pressure regulating valve is provided on a terminal plate of a capacitor. This pressure regulating valve includes a gas permeable sheet, a valve body made of silicone rubber, a packing, and a cap. The gas permeable sheet that prevents permeation of electrolyte is provided so as to close a hole created in a terminal plate. The packing is interposed between the valve body and the gas permeable sheet, and is made of an elastic material with moisture permeation resistance higher than that of silicone rubber. The cap is fixed onto the terminal plate and covers the valve body and the packing such that the valve body and the packing are retained in a compressed state with respect to the terminal plate. The valve body and the packing are provided away from the gas permeable sheet.

Abstract: In a welding method, at least one of a set of a first electrode collector and a first terminal and a set of second electrode collector and a second terminal is welded one another. At this time, a laser beam is irradiated to a portion to be welded, elastic waves generated due to the laser beam from the portion to be welded are detected, and the detected elastic waves are integrated to calculate an index corresponding to an amount of connection energy in order to check a welded state.

Abstract: A capacitor includes a metal case and a terminal plate. The metal case accommodates a capacitor element together with a driving electrolyte and is joined to one of the electrodes of the capacitor element at its inner bottom surface. The terminal plate is joined to the other electrode at its inner surface so as to seal the opening of the metal case. The terminal plate is provided with a pressure regulating valve also functioning as a driving-electrolyte filling hole. The pressure regulating valve includes a ring-shaped elastic member which is pressed into the wall formed on the terminal plate.