Abstract: A power storage device includes a flat wound electrode body, a case, and a positive terminal ultrasonically welded to a positive current collecting part of the electrode body. A surface-welded portion of a welded portion formed on a laminated current collecting part of the positive current collecting part has an outer periphery of a rectangular shape and corresponds to a virtual surface-welded portion configured such that the virtual surface-welded portion is rotated by 45 degrees or less in a rotation direction in which a closest virtual corner is moved away from an electrode body main part. A distance from a reference position to a closest corner is longer than a virtual distance from the reference position to the closest virtual corner.

Abstract: A power storage device includes a flat wound electrode body, a case, and a positive terminal ultrasonically welded to a positive current collecting part of the electrode body. A surface-welded portion of a welded portion formed on a laminated current collecting part of the positive current collecting part has an outer periphery including an inner side, an outer side, a closer side and a far side. An outside close endpoint of the outer side is positioned on one side toward a reference position in an electrode widthwise direction with respect to an inside close endpoint of the inner side, and the closer side forms a straight line or a line passing through a region farther from the reference position than the straight line.

Abstract: Better joining between a wound electrode body and an electrode terminal is implemented. In a cross section orthogonal to a winding axis of a wound electrode body of the secondary battery herein disclosed, two separators respectively extend more inward of the wound electrode body than electrode sheets. A portion of one separator forming an innermost circumference of the wound electrode body is bound in a first curved part. An inner circumferential side end of the one separator is between a junction part of an electrode sheet and an electrode terminal, and a first top around the winding axis. A portion of the other separator forming the innermost circumference is bent in a second curved part, and the inner circumferential side end of the other separator is between the junction part and a second top around the winding axis.

Abstract: An electrode assembly includes a laminated assembly. The laminated assembly includes a positive electrode plate, a separator, and a negative electrode plate. Each of the positive electrode plate, the separator, and the negative electrode plate has a strip-like planar shape. The laminated assembly is spirally wound. In a cross section orthogonal to a winding axis of the laminated assembly, the electrode assembly includes a first curved portion, a flat portion, and a second curved portion. Winding of the positive electrode plate is terminated in the second curved portion. A winding- terminated position of the positive electrode plate is located beyond a peak of the second curved portion. The negative electrode plate includes a negative electrode substrate and a negative electrode active material layer. The negative electrode substrate includes an exposed portion on each of both sides of the negative electrode plate in a width direction.

Abstract: In order to rapidly specify a failed apparatus in such an environment at a data center that handles a large number of electronic devices exemplified by servers with ease so that maintainability can be improved, when each configuration retaining apparatus receives information concerning an apparatus specified by a management terminal, a configuration retaining apparatus displaying controller displays the information concerning the specified apparatus on the configuration retaining apparatus monitor.

Abstract: In order to rapidly specify a failed apparatus in such an environment at a data center that handles a large number of electronic devices exemplified by servers with ease so that maintainability can be improved, when each configuration retaining apparatus receives information concerning an apparatus specified by a management terminal, a configuration retaining apparatus displaying controller displays the information concerning the specified apparatus on the configuration retaining apparatus monitor.