A winding apparatus that produces electrical energy storage devices includes a rotatable winding core on which two electrode strips and two separator strips are wound, strip guides which guide the various strips along feeding paths, and at least one rotatable and/or slidable portion that supports at least one strip guide. The rotatable and/or slidable portion rotates and/or slides, respectively, to adjust the position of the respective strip according to an increase in the diameter of the wound product in order to have the desired insertion direction of the strip with respect to the peripheral surface of the product.

An electrode foil that progresses an enlargement of the surface area of a dielectric film and that barely causes cracks which would even break a core part at the time of winding, a winding capacitor obtained by winding the electrode foil, an electrode foil manufacturing method, and a winding capacitor manufacturing method are provided. An electrode foil is formed of a belt-like foil, and has a surface enlarged part, a core part, and a plurality of separation parts. The surface enlarged part is formed on the surface of the foil, and the core part is a part remained when excluding the surface enlarged part within the foil. The separation part extends in a width direction of the belt in the surface enlarged part, dividing the surface enlarged part. The plurality of separation parts share bending stress when the electrode foil is wound, preventing concentration of stress.

An electrode foil that progresses an enlargement of the surface area of a dielectric film and that barely causes cracks which would even break a core part at the time of winding, a winding capacitor obtained by winding the electrode foil, an electrode foil manufacturing method, and a winding capacitor manufacturing method are provided. An electrode foil is formed of a belt-like foil, and has a surface enlarged part, a core part, and a plurality of separation parts. The surface enlarged part is formed on the surface of the foil, and the core part is a part remained when excluding the surface enlarged part within the foil. The separation part extends in a width direction of the belt in the surface enlarged part, dividing the surface enlarged part. The plurality of separation parts share bending stress when the electrode foil is wound, preventing concentration of stress.

Provided is a method for manufacturing a laminated electrode body which is excellent in terms of productivity and production cost. The method for manufacturing a laminated electrode body disclosed herein includes the steps of: preparing a wound body having a flat portion and two curved portions by using a laminate formed of an elongated positive electrode, an elongated negative electrode, and an elongated separator that insulates the positive electrode and the negative electrode from each other; preparing an electrode laminate structure having two cut surfaces by cutting out and removing the two curved portions of the wound body; and removing active materials on the cut surfaces of the electrode laminate structure by spraying an inactive gas or electrically insulating particles onto the cut surfaces while applying, to the electrode laminate structure, a voltage of 25 V or more and less than a voltage causing a dielectric breakdown of the separator.

A power storage device that includes a first wound body which is formed by winding part of a stacked body including a positive electrode, a negative electrode and a separator disposed between the positive electrode and the negative electrode; and a second wound body which is formed by winding at least part of a portion of the stacked body which does not constitute the first wound body, and at least one of a length in a winding axis direction and a position in the winding axis direction of the second wound body is different from the first wound body.

A ceramic-wound-capacitor includes a first-electrically-conductive-layer, a dielectric-layer, a second-electrically-conductive-layer, and a protective-coating. The dielectric-layer is formed of lead-lanthanum-zirconium-titanate (PLZT). The protective-coating has a thickness of less than ten micrometers (10 m) and provides electrical isolation between the first-electrically-conductive-layer and the second-electrically-conductive-layer of the ceramic-wound-capacitor. A method for fabricating the ceramic-wound-capacitor includes the steps of feeding a carrier-strip, depositing a sacrificial layer, depositing a first-electrically-conductive-layer, depositing a dielectric-layer, and depositing a second-electrically-conductive-layer to form an arrangement coupled to the carrier-strip by the sacrificial-layer, separating the arrangement from the carrier-strip and sacrificial-layer, creating an exposed-surface of the first-electrically-conductive-layer, applying a protective-coating to the exposed-surface of the first-electrically-conductive-layer, winding the arrangement with the protective-coating to form a ceramic-wound-capacitor, where the protective-coating is in direct contact with the first-electrically-conductive-layer and the second-electrically-conductive-layer of the ceramic-wound-capacitor.

A ceramic-wound-capacitor includes a first-electrically-conductive-layer, a dielectric-layer, a second-electrically-conductive-layer, and a protective-coating. The dielectric-layer is formed of lead-lanthanum-zirconium-titanate (PLZT). The protective-coating has a thickness of less than ten micrometers (10 m) and provides electrical isolation between the first-electrically-conductive-layer and the second-electrically-conductive-layer of the ceramic-wound-capacitor. A method for fabricating the ceramic-wound-capacitor includes the steps of feeding a carrier-strip, depositing a sacrificial layer, depositing a first-electrically-conductive-layer, depositing a dielectric-layer, and depositing a second-electrically-conductive-layer to form an arrangement coupled to the carrier-strip by the sacrificial-layer, separating the arrangement from the carrier-strip and sacrificial-layer, creating an exposed-surface of the first-electrically-conductive-layer, applying a protective-coating to the exposed-surface of the first-electrically-conductive-layer, winding the arrangement with the protective-coating to form a ceramic-wound-capacitor, where the protective-coating is in direct contact with the first-electrically-conductive-layer and the second-electrically-conductive-layer of the ceramic-wound-capacitor.

An electrode manufacturing system includes: a doping unit; a cleaning unit: and a conveyor unit. The doping unit performs a process of doping an active material in a strip-shaped electrode with an alkali metal, the strip-shaped electrode including an active material layer formed portion in which an active material layer including the active material is formed, and an active material layer unformed portion in which the active material layer is not formed. The cleaning unit cleans the active material layer unformed portion that is adjacent to the active material layer formed portion. The conveyor unit conveys the electrode from the doping unit to the cleaning unit.

An electrode manufacturing system includes: a doping unit; a cleaning unit: and a conveyor unit. The doping unit performs a process of doping an active material in a strip-shaped electrode with an alkali metal, the strip-shaped electrode including an active material layer formed portion in which an active material layer including the active material is formed, and an active material layer unformed portion in which the active material layer is not formed. The cleaning unit cleans the active material layer unformed portion that is adjacent to the active material layer formed portion. The conveyor unit conveys the electrode from the doping unit to the cleaning unit.

The invention relates to a device (30) for separating at least two strands of material (12a, 12b) from the cutting of a strip of material moving continuously, characterized in that the device includes a spreader (32, 33) for spreading the strands of material apart in a transverse direction (v) extending in the movement plane (P2) of the strands of material, perpendicularly to the movement direction of said strands of material.