Abstract: A device for evaluating a secondary battery disclosed herein includes: a first acquirer that acquires information on a predetermined item from a secondary battery to be evaluated; an output current determiner that determines an output current value to be output from the secondary battery based on the information obtained by the first acquirer; and an evaluator that evaluates a deterioration state of the secondary battery based on discharge data obtained when the output current value determined by the output current determiner is output.

Abstract: The present disclosure provides an assembled battery having a plurality of unit cells, spacers disposed so as to sandwich the unit cells, and restraining members that restrain the unit cells and the spacers in an array direction X. In each unit cell, a flat wound electrode body having a winding end fixed by a fixing member is accommodated in a battery case. The spacers are provided with rib portions protruding towards long side surfaces of the battery case. Flat portions of the electrode body each have a pressing region including a pressing site that opposes the rib portions, and a moderation region other than the pressing region. The pressing region includes at least the center of each flat portion in a winding axis direction, and a first pressing region over a direction along a major axis. The fixing member is disposed at the moderation region.

Abstract: A device for evaluating a secondary battery disclosed herein includes: a first acquirer that acquires information on a predetermined item from a secondary battery to be evaluated; an output current determiner that determines an output current value to be output from the secondary battery based on the information obtained by the first acquirer; and an evaluator that evaluates a deterioration state of the secondary battery based on discharge data obtained when the output current value determined by the output current determiner is output.

Abstract: The present disclosure provides an assembled battery having a plurality of unit cells, spacers disposed so as to sandwich the unit cells, and restraining members that restrain the unit cells and the spacers in an array direction X. In each unit cell, a flat wound electrode body having a winding end fixed by a fixing member is accommodated in a battery case. The spacers are provided with rib portions protruding towards long side surfaces of the battery case. Flat portions of the electrode body each have a pressing region including a pressing site that opposes the rib portions, and a moderation region other than the pressing region. The pressing region includes at least the center of each flat portion in a winding axis direction, and a first pressing region over a direction along a major axis. The fixing member is disposed at the moderation region.