Abstract: Provided is a battery pack that can securely prevent liquid, such as water and wash fluid, attached to an outer surface of a packaging case housing a plurality of electric cells from entering an internal space of the packaging case from between a tray and a cover and that also allows easily performing attachment and detachment work of the cover to and from the tray. The packaging case includes an edge cover for covering the whole circumference of a lower flange portion of the tray and an upper flange portion of the cover that abut each other. The edge cover includes a first section facing the lower flange portion, a second section facing the upper flange portion, and a connecting portion for connecting base ends of the first section and the second section. A plurality of female threaded portions are arranged on either the first section or the second section.

Abstract: An energy storage device includes an electrode assembly, a container that contains the electrode assembly therein, a metallic cover member that closes the opening of the container and has a first fitting portion, and a current collector having a second fitting portion that is fitted to the first fitting portion in a fitted state. Thus, the compact energy storage device having a large capacity can suppress the positional deviation between the cover member and the current collector.

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: A cover 1b of a battery pack case has an intake port and an exhaust port 31. With in the battery pack case, battery accommodation sections respectively accommodate battery modules and a junction box accommodation section. A supply flow path and an exhaust flow path are provided at ends of each of the battery accommodation section. A guide is provided between the cover and the battery modules accommodated in the battery accommodation portions. The guide and a lower surface of the cover define a distribution flow path. The air introduced from the intake port flows to the exhaust port through the distribution flow path, supply flow paths, clearances between battery cells, exhaust flow paths, and exhaust port. The battery cells are efficiently cooled.

Abstract: Provided is an energy storage device including a container with high productivity and satisfactory corrosion resistance. In the energy storage device including the container housing an electrode assembly having a positive electrode and a negative electrode, and electrolyte solution, the container is made of stainless steel including 0.09% by weight or more aluminum and has welded portions and where the stainless steel is welded.

Abstract: A cell includes a case having a plurality of walls, a power generating element housed in the case in a state of being away from an inner surface of a bottom surface of the case, and a heat transfer member in contact with an outer surface of the bottom surface of the case.

Abstract: An energy storage device includes an electrode assembly, a container that contains the electrode assembly therein, a metallic cover member that closes the opening of the container and has a first fitting portion, and a current collector having a second fitting portion that is fitted to the first fitting portion in a fitted state. Thus, the compact energy storage device having a large capacity can suppress the positional deviation between the cover member and the current collector.

Abstract: A connecting body for electrically connecting a power generating element and an electrode terminal positioned on a surface of a device container for housing the power generating element, the connecting body including: a plate portion positioned on the surface of the device container; and a protruding portion being in a position on a surface of the plate portion and displaced from a position of the electrode terminal, and having a tip end protruding to face the power generating element and a base with a peripheral edge surrounded with a principal face of the plate portion.

Abstract: An electric storage apparatus includes a battery cell, an accessory, a holding member for holding the battery cell and the accessory so that the battery cell and the accessory are on opposite sides, and a fixing member for fixing the accessory to the holding member. A distance between the fixing member and the battery cell is set to be equal to or larger than a distance between the holding member and the battery cell.

Abstract: Provided is an electric storage that includes at least one electric storage device, a first external housing for housing the at least one electric storage device, and a second external housing for housing the first external housing, wherein the first external housing and the second external housing respectively include engaging portions, which are engaged with each other.

Abstract: An assembled battery includes plural electric cells, a covered member at least a portion of which is made of metal, and insulation cover. The covered member is disposed along side portions of the electric cells on which terminals are provided. The insulation cover includes a main portion interposed between the covered member and the side portions of the electric cells, and an auxiliary portion extending from the main portion along a projecting direction of the terminal.

Abstract: Provided is an electric storage apparatus including: a first external housing for holding at least one storage device that includes a first vertical wall portion for surrounding at least one electric storage device; and a second external housing including a second vertical wall portion for surrounding the first vertical wall portion and an open portion formed at an upper end. An outer surface of the first vertical wall portion is an inclined surface that is inclined to the second vertical wall portion, and one of an outer surface of the first vertical wall portion and an inner surface of the second vertical wall portion includes a protrusion portion that protrudes toward the other.

Abstract: A battery module includes a metal casing and a battery cell accommodated in the casing. The casing is provided on its outer surface with an insulation layer and a conductive portion.

Abstract: An assembled battery includes: a case in which plural electric cells are accommodated; and an abutment member which abuts against the electric cells accommodated in the case to position the electric cells with respect to the case. The abutment member includes a first projection inserted into a first gap defined by the case and the mutually adjacent electric cells to align the abutment member.

Abstract: An electrode assembly has a positive sheet, a negative sheet, and separators that are stacked and wounded. A joint portion is formed by thermally fusion bonding or compression bonding of the separators at one end in a width direction thereof so that one end of the positive sheet on an opposite side in a width direction with respect to a positive lead is wrapped by the separators. Arranged outside of the joint portion in the width direction is a separating portion where the separators are separated from each other. A protecting layer made of an insulating material is formed on the end face of the positive sheet. The positive sheet is reliably prevented from being in contact with a foreign material.

Abstract: A battery includes positive and negative external terminals having exposed portions exposed from a casing to the outside, positive and negative current collectors connected to the external terminals, and electrode assemblies having positive and negative electrodes and a separator. The positive and negative electrodes are wound with the separator being interposed so as to have positions shifted to opposite sides in a width direction to the separator. Formed in the casing is a narrowly elongated gap extending between the positive current collector side and the negative current collector side. The positive electrode side of the gap is closed by a closure member. A foreign material is prevented from moving without decreasing an electric capacity of the battery and deteriorating injection property of an electrolytic solution.

Abstract: A method for producing an electric storage device having a bus bar and an electric storage element equipped with an external terminal includes the steps of: arranging the electric storage element having the external terminal, positioning a resin member having either one of a receiving portion or a projection relative to the electric storage element, arranging the bus bar having the other one of the receiving portion or the projection on the external terminal, connecting the bus bar to the external terminal, and inserting the projection into the receiving portion in the step of arranging the bus bar.

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 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.