Abstract: A cell stack assembly, including: a plurality of stacked battery cells, each including an electrode assembly; a laminate exterior packaging that covers the electrode assembly and encloses the electrode assembly internally; and a fixing tape, including at least one of an inner fixing tape wound in a peripheral direction onto an outer peripheral face of the electrode assembly at an inner side of the laminate exterior packaging, or an outer fixing tape wound in a peripheral direction onto an outer peripheral face of the laminate exterior packaging, wherein: taking a direction in which the plurality of battery cells are stacked as a stacking direction, the fixing tape is wound such that winding positions of the fixing tape do not overlap in the stacking direction for at least one adjacent pair of the battery cells.

Abstract: In the electrode laminate of the present disclosure, a fixing member including a curable resin is disposed on at least one side face portion. The fixing member has a thin film region and a thick film region. The thin film region is formed on at least one end portion including the terminal end of the fixing member, and the thick film region is formed at a portion other than the thin film region. The thickness of the fixing member is thinnest at the terminal end. Further, the battery of the present disclosure includes the electrode laminate of the present disclosure and a laminate film sealing the electrode laminate.

Abstract: A battery of the present disclosure includes: an electrode stack; a current collector foil extending from a side surface portion of the electrode stack; a current collector terminal electrically connected to the current collector foil; and a laminate film in which the electrode stack and the current collector terminal that are wound together are sealed. Further, the current collector terminal constituting the battery of the present disclosure has a bonding region bonded to the current collector foil, and the bonding region has a contact portion in contact with the current collector foil and a non-contact portion not in contact with the current collector foil.

Abstract: A battery cell includes an electrode body in which a plurality of laminated structures having a cathode, an anode, and a separator interposed between the cathode and the anode are further laminated, and a tape wound around the outer periphery of the electrode body over one circumference, wherein the tape has an overlapping portion in which one side and the other end side in an outer peripheral direction overlap each other, and a direction in which a plurality of laminated structures are laminated in the electrode body is defined as a lamination direction, and in a case where an end surface in a lamination direction in the electrode body is defined as a lamination surface, the overlapping portion is disposed on a surface other than the lamination surface in the electrode body.

Abstract: A laminated battery, a battery element, and a laminate film enclosing the battery element, wherein the laminate film has a fused portion in which end portions are overlapped and an inner surface is fused, and the laminate film has a fused portion side surface in which a fused portion is formed, an opposite side surface opposed to the fused portion side surface, and a pair of main surfaces orthogonal to the fused portion side surface and the opposite side surface and having an area larger than the fused portion side surface and the opposite side surface, and the laminate film has an uneven shape on at least one of the fused portion side surface and the opposite side surface.

Abstract: The laminated battery has an electrode body and a laminate film encapsulating the electrode body, and the laminate film has a fused portion in which end parts are overlapped and an inner surface is fused, and the fused portion has two bent parts bent in an angular shape or an arcuate shape so as to have an angle of 90° or less, and a roll part arranged closer to the front end side of the fused portion than the bent parts at 2 places and rounded in a roll shape.

Abstract: The laminated battery includes an electrode body and a laminate film enclosing the electrode body. The laminate film has a structure in which a metal layer and a fusion resin layer are at least laminated on the inside of the metal layer. The laminate film has a fused portion in which the fusion resin layers of the inner surface are fused by overlapping end portions, a portion of the fused portion, the metal layers to each other has a metal adhesion portion that is in close contact over the entire area in the longitudinal direction of the fused portion.

Abstract: The laminated battery of the present disclosure includes an electrode body and a laminate film that covers and encloses the electrode body. The laminate film has a fused portion in which end portions are superposed to each other and an inner surface is fused. The fused portion is bent along a folding line extending in a longitudinal direction of the fused portion. The fused portion has a surface facing the electrode body in a region closer to the distal end than the folding line, and has a wavy shape along the longitudinal direction of the fused portion.

Abstract: A laminated battery includes: an electrode body; and a laminate film package that covers the electrode body and encloses the electrode body therein. In the laminated battery, the laminate film package includes a first laminate film portion and a second laminate film portion, and the laminate film package has a fused part at which an end part of the first laminate film portion and an end part of the second laminate film portion are overlaid and inner surfaces thereof are fused together. The fused part has an acute angle bent part that is bent in an angular shape or an arcuate shape to form an angle of less than 90°, and includes, in a region further toward a leading end of the fused part than the acute angle bent part, a leading end side region that is redirected away from a direction of bending in the acute angle bent part.

Abstract: A laminated battery includes an electrode body and a laminate film, wherein the laminate film has a structure in which at least a metal layer and a protective resin layer are laminated, and the laminate film has a fused portion in which end portions are overlapped and an inner surface is fused, wherein the laminated film has a bending step of bringing a bending member into contact with the fused portion so as to form one or more bent portions by bending in an angular or arcuate shape so as to have an angle of 90° or less, and the bending member is made of a conductive material, and the bending step is a step of performing the folding while confirming the conduction between the bending member and the metal layer of the laminate film.

Abstract: A power storage cell includes an electrode assembly, an insulating plate, and a cell case. The electrode assembly includes a plurality of electrodes and a separator. The electrodes include respective current collector foils and active material layers. The electrode assembly includes: an electrode assembly body where respective parts of the current collector foils provided with the active material layers are arranged side by side in one direction with the separator interposed therebetween; and a plurality of current collector tabs formed by respective parts of the current collector foils not provided with the active material layers. The current collector tabs are bent with a part of one current collector tab superposed on an adjacent current collector tab. The insulating plate includes a base portion and a thickness adjusting portion located on an end of the base portion in a second direction. The thickness adjusting portion tapers inward in the second direction.

Abstract: A laminated battery includes an electrode body and a laminate film that covers and seals the electrode body inside. The laminate film has a fused portion formed by superposing end portions of the laminate film and fusing together their inner surfaces. The fused portion has three or more bend portions including two or more fold portions that are bent in angular or arcuate shapes so as to have an angle of 90° or less and one distal end-side bend portion that is bent in an angular or arcuate shape so as to have an angle less than 180° in a position closest to a distal end of the fused portion. The fused portion has a shape in which at least part of the distal end faces the electrode body side.

Abstract: A power storage cell includes an electrode assembly and a cell case containing the electrode assembly. The electrode assembly includes a plurality of electrodes arranged in one direction, and a separator formed in a fanfold shape. The separator includes: a plurality of intervening portions each intervening between a pair of electrodes adjacent to each other in the one direction; an upper folded portion; and a lower folded portion. At least one of the upper folded portion and the lower folded portion is provided with a discharge hole for discharging gas.

Abstract: An electrode assembly includes a plurality of electrodes arranged side by side in one direction, and a separator formed in a zigzag shape and configured to insulate the electrodes from each other. The separator includes a plurality of intervening portions interposed between a pair of electrodes, an upper folded portion, and a lower folded portion. At least one of the upper folded portion and the lower folded portion is connected to the electrode.

Abstract: An electrode assembly includes a plurality of electrodes arranged side by side in one direction, and a separator formed in a zigzag shape and configured to insulate the plurality of electrodes from each other. The separator includes a plurality of intervening portions, each of which is interposed between a pair of electrodes, an upper folded portion, a lower folded portion, and an outermost covering portion collectively covering the upper folded portion and the lower folded portion. The upper folded portion is connected to the outermost covering portion, and the lower folded portion is connected to the outermost covering portion.

Abstract: A power storage cell includes an electrode assembly, a cell case, and an electrolytic solution. The electrode assembly includes a plurality of electrodes arranged side by side in one direction, and a separator formed in a zigzag shape and configured to insulate the electrodes from each other. The separator includes a plurality of intervening portions interposed between a pair of electrodes, an upper folded portion, and a lower folded portion. The plurality of electrodes include a plurality of positive electrodes and a plurality of negative electrodes. The negative electrode is disposed above the lower folded portion. The porosity of the lower folded portion is smaller than the porosity of the intervening portion.

Abstract: A push-breaking device has: a placement stand; a pressing mechanism; and at least one cutting blade tool. By the cutting blade tool, which moves along a first direction with respect the placement stand, the device pushes and bends, and breaks, a portion of a protruding region, which protrudes outward from the placement stand and the pressing mechanism, of the layered electrode sheet, which is pressed by the pressing mechanism in a second direction. An angle of a blade portion of the cutting blade tool with respect to the second direction is 15°-30°. An angle of the blade portion with respect to the first direction is an acute angle. A length, in the second direction, of a clearance between the blade portion and an end, at the cutting blade tool side, of the placement stand is 10%-35% of a length of the layered electrode sheet in the first direction.

Abstract: A laminated battery of the present disclosure is a laminated battery. The laminated battery has: an electrode body; side surface members disposed at side surfaces of the electrode body; a laminate sheet covering the electrode body; and tab films disposed between the side surface members and the laminate sheet. The side surface members and the laminate sheet are welded via the tab films. The tab films have inner side excess resin portions that project out from ends, which are at electrode body sides, of the side surface members.

Abstract: A method of producing a battery produces a battery that includes: an electrode body including current collector; a side face member including a terminal and disposed at a side face of the electrode body, the side face member having a joining face that is ultrasonically joined to the current collector, and a pair of side faces adjacent to the joining face; and resin layers disposed at surfaces of the pair of side faces of the side face member. The method includes a joining step of ultrasonically joining the current collector to joining face of the side face member. The joining step includes performing ultrasonic joining while grasping, via the resin layers, pair of side faces of the side face member by a pair of clamps having plural projections. The grasping is carried out such that the projections of clamps penetrate through resin layers and contact the pair of side faces.

Abstract: A method of manufacturing a power storage cell includes: a preparing step of preparing an electrode sheet including a current collecting foil and an active material layer; a cutting step of forming a plurality of cuts in the current collecting foil to form a plurality of connecting pieces; and a winding step of winding the electrode sheet around a winding core while bending each of the connecting pieces. The current collecting foil prepared in the preparing step includes a main region and an end region, and the end region includes an edge portion. In the cutting step, a plurality of cuts are formed in the end region to form connecting pieces each having a wide portion and a narrow portion between a pair of cuts. In the winding step, the electrode sheet is wound around the winding core while bending each connecting piece at the narrow portion.