NIPPON CHEMI-CON CORPORATION

The power storage device includes: a case (exterior case 4 ) including a storage portion ( 6 ); a power storage element ( 8 ) in which an electrode tab (anode tab 10 , cathode tab 12 ) is formed on a wound end surface and which is stored in the storage portion; a sealing member ( 18 ) which is disposed in the storage portion and whose peripheral surface is crimped to an inner wall surface of the case by swaging (swaging portion 30 ) from an outer peripheral side of the case to seal an opening portion of the storage portion; a support plate (current collecting plate 14 ) which is in contact with and supports a surface of the sealing member, the surface facing a bottom side of the storage portion; and a support member (folder 20 ) which is disposed on a surface of plane surfaces of the sealing member, the surface of the plane surfaces facing an opening portion side of the storage portion, and presses and supports the sealing member by engagement with an opening end ( 36 ) of the case swaged (vertical swaging portion 32 ) toward the bottom side of the storage portion. As a result, the sealed state of the case by the sealing member is stabilized against an increase in the pressure in the case.

The present disclosure provides a manufacturing method to improve a capacity appearance rate of a solid electrolytic capacitor, and a solid electrolytic capacitor with improved capacity appearance rate. A wound body 1 , in which anode foil on which dielectric film is formed and cathode foil facing each other are wound, is wrapped by a hydrophobic adhesive tape 2 . The conductive polymer was formed using conductive polymer solution with the conductive polymer dispersed or dissolved therein and with viscosity of 10 mPa·s to 60 mPa·s. That is, the wound body 1 is immersed in the conductive polymer solution with viscosity of 10 mPa·s to 60 mPa·s to attach the conductive polymer in the wound body 1.

The present disclosure provides a manufacturing method to improve a capacity appearance rate of a solid electrolytic capacitor, and a solid electrolytic capacitor with improved capacity appearance rate. A wound body 1 , in which anode foil on which dielectric oxide film is formed and cathode foil facing each other are wound, is wrapped by a hydrophobic adhesive tape 2 . Lead terminals 3 having a lead wire 31 , a round bar portion 32 , and a flat portion in series are connected to the anode foil and the cathode foil at the flat portion 33 . The wound body 1 is immersed in conductive polymer solution at least at half a height or higher of the round bar portion 32 or 1 mm or higher from one end surface 1 a of the wound body 1 . And conductive polymer is attached to at least at half a height or higher of the round bar portion 32 or 1 mm or higher from one end surface 1 a of the wound body 1.

The present disclosure provides an electrolytic capacitor for middle or high voltage application of 160 V or more, which can suppress the total amount of gas generated inside the electrolytic capacitor. An electrolytic capacitor includes anode foil on which dielectric oxide film is formed, and a cathode body. The cathode body includes cathode foil formed of valve action metal and a carbon layer formed on the cathode foil. The anode foil and the cathode body have capacitance so that when capacitance X of the anode foil per unit area is 1, ratio of capacitance Y of the cathode body per the same unit area is equal to or more than 10.

An electrolytic capacitor that can suppress a decrease over time of capacity, a cathode body included in the electrolytic capacitor, and a production method of the electrolytic capacitor are provided. The electrolytic capacitor includes an anode foil, a cathode body, and electrolytic solution. The anode foil is formed of valve metal and has dielectric oxide film formed on a surface of the foil. The cathode body includes cathode foil formed of valve metal and a carbon layer laminated on the cathode foil. An interfacial resistance between the cathode foil and the carbon layer is 1.8 mΩ·cm 2 or less.

The present disclosure provides an electrolytic capacitor in which an increase in the ESR is suppressed even in the high-temperature environment, a cathode body in the electrolytic capacitor, and a manufacturing method of the electrolytic capacitor. The electrolytic capacitor includes an anode foil, a cathode body, and electrolytic solution. The anode foil is formed of valve metal and has dielectric oxide film on a surface of the foil. The cathode body includes cathode foil formed of valve metal and a carbon layer laminated on the cathode foil. An interfacial resistance between the cathode foil and the carbon layer is 1.1 mΩ·cm 2 or less.

An electrolytic capacitor with improved connectivity between a cathode body including a carbon layer and a lead terminal, and a production method thereof are provided. The electrolytic capacitor 1 includes an anode body 2 having a dielectric oxide film 5 on a surface thereof, a cathode body 3 having a cathode foil 31 and a carbon layer 32 formed on the cathode foil 31 , electrolytic solution 6 interposed between the anode body 2 and the cathode body 3 , and a lead terminal 7 connected to each of the anode body 2 and the cathode body 3 by cold pressure welding. A maximum static friction coefficient of a surface of the carbon layer of the cathode body is 0.6 or more.

The present disclosure provides an electrolytic capacitor in which an increase in the ESR is suppressed even in the high-temperature environment, a cathode body in the electrolytic capacitor, and a manufacturing method of the electrolytic capacitor. The electrolytic capacitor includes an anode foil, a cathode body, and electrolytic solution. The anode foil is formed of valve metal and has dielectric oxide film on a surface of the foil. The cathode body includes cathode foil formed of valve metal and a carbon layer laminated on the cathode foil. An interfacial resistance between the cathode foil and the carbon layer is 1.1 mΩ·cm 2 or less.

A capacitor includes a positive electrode foil, a negative electrode foil, and a separator disposed between the positive and negative electrode foils. The negative electrode foil includes a carbon layer, and the separator is in contact with the carbon layer. The separator has a density [symbol: ρ, unit: g/cm 3 ] satisfying the formula: ρ ≥ 4 . 0 × 1 ⁢ 0 - 3 × WPA , where WPA is the amount of carbon per square centimeter of the separator [unit: μg/cm 2 ].

The present disclosure provides a sealing body that can suppress thermal oxidative deterioration, and an electrolytic capacitor including the sealing body. The sealing body seals an opening of a casing housing a capacitor element in which anode foil and cathode foil with dielectric oxide film facing each other and which is impregnated with electrolytic solution. For example, the sealing body includes an elastomer member containing an elastomer such as butyl rubber. The initial cross-linking density of the elastomer is 1.8×10 −3 mol/g or more and the content of the elastomer relative to a total of the elastomer member is 30 wt % or less.