A battery includes: a plurality of solid-state battery cells; and a connection layer located between the solid-state battery cells. Each of the solid-state battery cells has a structure in which a positive electrode current collector, a positive electrode active material layer, a solid electrolyte layer including an inorganic solid electrolyte, a negative electrode active material layer, and a negative electrode current collector are laminated in this order. The solid-state battery cells are electrically connected in series. The positive electrode current collector of one of a pair of the solid-state battery cells and the negative electrode current collector of the other of the pair of the solid-state battery cells are laminated via the connection layer, the pair of the solid-state battery cells are adjacent solid-state battery cells among the solid-state battery cells. The connection layer includes a conductive material, and the Young's modulus of the connection layer is lower than the Young's moduli of the positive electrode current collector, the positive electrode active material layer, the solid electrolyte layer, the negative electrode active material layer, and the negative electrode current collector.

A battery includes: a plurality of solid-state battery cells; and a connection layer located between the solid-state battery cells. Each of the solid-state battery cells has a structure in which a positive electrode current collector, a positive electrode active material layer, a solid electrolyte layer including an inorganic solid electrolyte, a negative electrode active material layer, and a negative electrode current collector are laminated in this order. The solid-state battery cells are electrically connected in series. The positive electrode current collector of one of a pair of the solid-state battery cells and the negative electrode current collector of the other of the pair of the solid-state battery cells are laminated via the connection layer, the pair of the solid-state battery cells are adjacent solid-state battery cells among the solid-state battery cells. The connection layer includes a conductive material, and the Young's modulus of the connection layer is lower than the Young's moduli of the positive electrode current collector, the positive electrode active material layer, the solid electrolyte layer, the negative electrode active material layer, and the negative electrode current collector.

A winding-type or kind electrode assembly includes a first electrode, a separator, and a second electrode, wherein the first electrode includes a first substrate including a front surface and a rear surface, a front first active material layer on the front surface and a rear first active material layer on the rear surface, a first end functional layer on the front surface and spaced from the front first active material layer, and a second end functional layer on the rear surface and spaced from the rear first active material layer, and a step compensation layer on the second end functional layer and corresponding to a gap between the front first active material layer and the first end functional layer, wherein the first end functional layer is wound around the electrode assembly at least once.

A battery of the present disclosure includes a first solid-state battery cell and a buffer layer. The first solid-state battery cell includes a positive electrode, a negative electrode and a solid electrolyte layer located between the positive electrode and the negative electrode. The positive electrode or the negative electrode has a current collector. The buffer layer is in contact with a face of the current collector opposite to the solid electrolyte layer. The buffer layer includes a thermally expandable material and a conductive resin.

A battery of the present disclosure includes a first solid-state battery cell and a buffer layer. The first solid-state battery cell includes a positive electrode, a negative electrode and a solid electrolyte layer located between the positive electrode and the negative electrode. The positive electrode or the negative electrode has a current collector. The buffer layer is in contact with a face of the current collector opposite to the solid electrolyte layer. The buffer layer includes a thermally expandable material and a conductive resin.

An electrode assembly of a rechargeable battery includes an electrode plate of a positive electrode and a negative electrode on both surfaces of a separator. The electrode plate may include an electrode substrate, a first active material layer on a first surface of the electrode substrate, a second active material layer on a second surface of the electrode substrate, a first lamination tape and a second lamination tape attached to the first active material layer, an end portion of the electrode substrate, and the second active material. The first lamination tape forms a first attachment portion, the second lamination tape forms a second attachment portion, and an end of the first attachment portion on the first active material layer and an end of the second attachment portion on the second active material layer are spaced apart from each other in a winding direction.

An energy storage device, the energy storage device including a constraint that maintains a pressure on a unit cell configured for energy storage, e.g., during use of the unit cell.

The present disclosure relates to an electrode assembly for an all-solid-state battery with improved safety, and more particularly, to an electrode assembly of a new structure designed to prevent the damage of a solid electrolyte layer caused by a step formed in a negative electrode layer due to changes in thickness of the negative electrode layer, such as an increase or decrease in thickness at part of the negative electrode layer, during charging/discharging. The electrode assembly is characterized by comprising a protective layer having an opening, interposed between the negative electrode and the solid electrolyte layer.

The present application discloses a tray and a method for using same, and a battery production apparatus. The tray may be configured to carry a battery cell. The tray may include a tray body and a plurality of pressing bodies. The plurality of pressing bodies may be arranged at intervals in a first direction. The pressing bodies may be arranged on the tray body, the battery cell may be placed between two adjacent pressing bodies, each of the pressing bodies may be provided with a flexible pressing portion, and the flexible pressing portion may be configured to be in contact with the battery cell so as to press the battery cell.

The present application discloses a tray and a method for using same, and a battery production apparatus. The tray may be configured to carry a battery cell. The tray may include a tray body and a plurality of pressing bodies. The plurality of pressing bodies may be arranged at intervals in a first direction. The pressing bodies may be arranged on the tray body, the battery cell may be placed between two adjacent pressing bodies, each of the pressing bodies may be provided with a flexible pressing portion, and the flexible pressing portion may be configured to be in contact with the battery cell so as to press the battery cell.