An electrical energy storage device includes prismatic energy storage cells arranged adjacent to one another such that interfaces of adjacent storage cells run at a distance from one another such that the interfaces of the adjacent storage cells form an intermediate space. A respective first layer is arranged between the interfaces of adjacent storage cells, the first layer abutting one of the two interfaces of the adjacent storage cells under pressure. Either the respective first layer also abuts the second of the two interfaces of the adjacent storage cells under pressure, or a second layer is arranged between the interfaces of adjacent storage cells, the second layer abutting the second of the two interfaces of the adjacent storage cells under pressure. A heat-conducting device is arranged in or between the first layer and the second layer is conducted out of the intermediate space between the adjacent storage cells.

An electrical energy storage device includes prismatic energy storage cells arranged adjacent to one another such that interfaces of adjacent storage cells run at a distance from one another such that the interfaces of the adjacent storage cells form an intermediate space. A respective first layer is arranged between the interfaces of adjacent storage cells, the first layer abutting one of the two interfaces of the adjacent storage cells under pressure. Either the respective first layer also abuts the second of the two interfaces of the adjacent storage cells under pressure, or a second layer is arranged between the interfaces of adjacent storage cells, the second layer abutting the second of the two interfaces of the adjacent storage cells under pressure. A heat-conducting device is arranged in or between the first layer and the second layer is conducted out of the intermediate space between the adjacent storage cells.

A battery submodule carrier includes a monolithic cell tray configured to accommodate a plurality of aligned battery cells; a plurality of cell retainers configured to retain the battery cells within the cell tray; and a plurality of tray fasteners configured to mount the cell tray to a battery system carrier.

A battery submodule carrier includes a monolithic cell tray configured to accommodate a plurality of aligned battery cells; a plurality of cell retainers configured to retain the battery cells within the cell tray; and a plurality of tray fasteners configured to mount the cell tray to a battery system carrier.

An all solid state battery in which positional displacement of a plurality of cells arranged along a thickness direction can be prevented is provided. The all solid state battery includes a plurality of cells connected in series, wherein the all solid state battery includes a cell unit A and a cell unit B, a first current collector A in the cell A and a second current collector B in the cell B are arranged to face each other, the first current collector A includes a tab A, the second current collector B includes a tab B, and the tab A and the tab B are fixed by a fixing portion.

A heat dissipation structure including a plurality of heat dissipating members, and a support plate for supporting the heat dissipating members. Each of the heat dissipating members includes a plurality of cushion members each having a hollow or a solid shape, and a heat conduction sheet covering an outer surface of the cushion members. The support plate includes a plurality of grooves for supporting the heat dissipating members in a direction orthogonal to a longitudinal direction of the heat dissipating members. Each of the grooves is a curved recess portion formed in a thickness direction, opened to the side of the heat dissipating member, formed to have a radius of curvature larger than a radius of curvature of the heat dissipating member, and to have a depth smaller than a circular conversion diameter of the heat dissipating member, and a battery provided with the heat dissipating structure.

A battery pack of an electric or hybrid motor vehicle, which is constituted by an upper casing and a lower casing, is provided with a cooling circuit which enables circulation in the pack of a cooling fluid which is intended to be sprayed onto battery modules by spray nozzles. The cooling circuit is suitable for ensuring circulation of the cooling fluid in a closed circuit inside the pack, with a pump which is arranged in the internal vessel of the pack being capable of recirculating, back to the spray nozzles, the cooling fluid which is sprayed onto the modules and collected in a double base arranged under a base wall of the lower casing by discharge openings which are formed in the base wall of the lower casing.

A secondary battery may include a cell body member accommodating an electrode assembly therein, including three sealing sides and provided adjacently to a cooling plate member; and the cell body member, in contact with a heat conductive member on a lower surface thereof includes a surface area-increasing groove formed to be concave in the lower surface thereof and the lower surface is a region in which a sealing portion is not formed, the heat conductive member is provided in at least a portion between the cell body member and the cooling plate member to form a heat path for transferring heat from the cell body member to the cooling plate member, the surface area-increasing groove includes a curved-region in a cross section in a thickness direction of the cell body member, and the curved-region is in contact with the heat conductive member.

A battery pack includes: a plurality of stacked battery cells; a holding member that holds the plurality of battery cells; an adhesive member that is interposed between each of the battery cells and the holding member and that adheres each of the battery cells and the holding member; and a heat conduction member that has an elastic modulus smaller than an elastic modulus of the adhesive member and that is interposed between each of the battery cells and the holding member.

A secondary battery includes: an electrode assembly including a negative electrode tab at a first end and a positive electrode tab at a second end; a case including a pair of first side portions facing each of a pair of long side portions of the electrode assembly, and a pair of second side portions facing each of a pair of short side portions of the electrode assembly, the case being open in directions of the negative electrode tab and the positive electrode tab; and a retainer between at least one of the second side portions and the electrode assembly and including a concave-convex structure.