Abstract: Provided is an electric storage apparatus including: an electric storage device; a circuit module; and an enclosure for housing the electric storage device, wherein: any one thereof includes an engaging portion; any one of the remaining ones includes an engaged portion; and the engaging portion and the engaged portion are engageable with and disengageable from each other.

Abstract: A power source unit includes a battery main body including at least one battery cell, an electric device located on the battery main body, and a wall located along a lateral side of parts included in the electric device. The wall is taller than a height of the parts.

Abstract: A battery pack includes a stack including a plurality of battery cells aligned, holding plates respectively provided on side faces of the stack for holding the stack, a coupling member disposed along a direction in which the battery cells are aligned and fixed to the holding plates to bind the plurality of battery cells, and an insulating member provided between the coupling member and the plurality of battery cells. The insulating member includes projecting portions disposed adjacent to and along at least one of side faces of the coupling member and projecting toward the coupling member.

Abstract: A power source unit includes a battery module including a stack and a coupling member that binds the stack, the stack including a plurality of battery cells aligned, and a container that accommodates therein the battery module. The container includes a projecting portion projecting from an inner wall of the container toward a surface of the battery module, and a top end portion of the projecting portion is located separately from the coupling member.

Abstract: An electric storage device includes: electric storage elements including external terminals; and bus bars connected to the external terminals, wherein the bus bars include thin-walled portions, and the thin-walled portions and the external terminals are welded together.

Abstract: A battery pack includes a stack case, spacers, and inner cover members as insulating members. The stack case accommodates a plurality of single cells arranged in line. Each of the spacers is disposed between adjacent single cells. The inner cover member is provided for each of the single cells, and is disposed on a surface of the single cell where terminals are provided. The inner cover member includes a base portion opposed to a surface of the single cell between terminals and terminal insulating portions provided on both ends of the base portion and covering the terminals. The inner cover member is attached to the spacer.

Abstract: An electric storage apparatus includes a holder for holding a plurality of electric storage devices. An inter-electric storage device air passage is formed between the electric storage devices. A holder body of the holder includes: at least one wall portion extending in a second direction, the at least one wall portion being opposed from outside to an electric storage device located at one end in a first direction among the plurality of electric storage devices; and an air vent portion formed side by side with the wall portion in a third direction orthogonal to the first and second directions, the air vent portion being opened to the first and second directions.