Abstract: This electrode body for secondary batteries comprises: a positive electrode; a negative electrode; an outer separator; and an inner separator which is arranged inside the outer separator. An outer electrode, which is either the positive electrode or the negative electrode arranged on the outer side, is sandwiched by the outer separator and the inner separator. The outer separator and the inner separator have: two electrode facing parts that face the outermost layers of the outer electrode, while overlapping with each other, with the outer electrode being interposed therebetween; and a terminal overlapping part that is provided at respective ends of the outer separator and the inner separator. The thickness of the front end of the terminal overlapping part is larger than the sum of the thicknesses of the two electrode facing parts.

Abstract: A cylindrical battery according to an exemplary embodiment comprises a bottomed cylindrical outer can, a sealing body that closes an opening in the outer can, and a gasket interposed between the outer can and the sealing body. On the outer can, an edge of the opening is curved inward, and a crimped part is formed pressing the sealing body via the gasket. The crimped part includes: a base-end-side part that is inclined so that the gap with the sealing body becomes smaller toward the inside of the outer can; and a tip-end-side part that is inclined at a smaller angle at the sealing-body side than the base-end-side part, or is parallel to the bottom surface part of the outer can, or is inclined so that the gap with the sealing body becomes larger toward the tip end.

Abstract: A manufacturing method of a positive electrode plate for a non-aqueous electrolyte secondary battery includes a coating and drying step of coating a positive electrode active material layer and a protective layer onto a positive electrode core so that the protective layer forms a raised part between a portion inside a side end of a core exposed part in a width direction and a width-direction center, and then drying the positive electrode active material layer and the protective layer; and a compressing step of compressing the protective layer and the positive electrode active material layer so as to press the raised part formed in the coating and drying step and the positive electrode active material layer.

Abstract: A cylindrical battery according to an embodiment of the present disclosure has a sealing plate includes a flange portion which is secured by crimping to the opening portion of the outer can, a terminal portion formed on the radially inner side of the flange portion, and a thin-walled portion which is formed on the radially outer side of the sealing plate, and which connects the flange portion and the terminal portion; and the thin-walled portion is formed in such a way as to be inclined upward toward the outside from the radially inner side of the sealing plate, and is formed in such a way as to connect a part below the central portion of an outer circumferential surface of the terminal portion to a part above the central portion of an inner circumferential surface of the flange portion.

Abstract: Main management unit manages the plurality of power storage modules via the plurality of sub-management units. Main management unit and the plurality of sub-management units are daisy-chain connected by power line. Main management unit can supply power from power storage unit other than the plurality of power storage modules to the plurality of sub-management units via power line. Main management unit and the plurality of sub-management units respectively include communication units. Each of communication units superimposes a communication signal on power line.

Abstract: This nonaqueous electrolyte secondary battery is provided with: an electrode body that comprises a positive electrode and a negative electrode; and a nonaqueous electrolyte solution that contains a nonaqueous solvent. The ratio of the capacity (Qn) of the negative electrode to the capacity (Qp) of the positive electrode, namely Qn/Qp is 1.4 or more; and the nonaqueous electrolyte solution contains, relative to the total volume of the nonaqueous solvent at 25° C., from 0.5% by volume to 10% by volume of methyl acetate and from 0.01 mole/L to 0.05 mole/L of lithium bisoxalato borate.

Abstract: A non-aqueous electrolyte secondary battery includes an electrode body having a positive electrode plate and a negative electrode plate stacked with a separator interposed therebetween, a rectangular exterior body, a sealing plate, an electrode terminal, a first current collector in connection with the electrode terminal, a second current collector in connection with the first current collector, and a tab group extending from the electrode body and connected to the second current collector. The tab group includes a positive electrode tab group/negative electrode tab group extending from a positive electrode core of the positive electrode plate/negative electrode plate, and is bent near a connection with the second current collector. A surface of the positive electrode core on and near its end from which the positive electrode tabs extend is covered with a protective layer. One end of the negative electrode plate faces the protective layer on the positive electrode plate.

Abstract: A hermetically sealed battery which is an example of an embodiment is provided with: an electrode body having an electrode tab; an outer can in the shape of a bottomed cylinder for accommodating the electrode body; and a sealing body for closing an opening portion of the outer can. The sealing body includes: a first thin-walled portion formed in an annular shape; a valve portion which surrounds the first thin-walled portion, and which deforms in such a way as to protrude to the outside of the battery when the internal pressure in the battery rises; and a linear second thin-walled portion formed in the valve portion. The electrode tab is disposed in such a way as to intersect the second thin-walled portion, and is joined to an inner surface of the valve portion in such a way as to sandwich the second thin-walled portion.

Abstract: A battery module comprising: a battery integrated body in which a plurality of rectangular secondary batteries are layered; a pair of end plates that sandwich the battery integrated body: and a pair of side-surface securing members that form a bridge between the end plates, and a top-surface securing member, each secondary battery including a flat wound electrode body in which a positive electrode and a negative electrode are wound with a separator interposed therebetween, so that the winding axes are in the transverse direction, and the winding ends of the negative electrodes of at least the secondary batteries adjacent to the end plates face upward, the winding ends being positioned in the gap between half the height of the electrode body and the top part of the curved section of the electrode body in a cross-section orthogonal to the winding axes.

Abstract: The purpose of the present disclosure is to provide a sealed battery that can expand a joint area of an electrode lead with respect to a sealing body or the like without using a large-width electrode lead. A sealed battery, which is an example of an embodiment, comprises: an electrode body having an electrode lead; a bottomed tubular exterior can that accommodates the electrode body; and a sealing body that plugs an opening section of the exterior can. The electrode lead is welded, with energy beams, to the inner surface of the sealing body. In addition, the electrode lead includes: a first main surface making contact with the inner surface of the sealing body; and a second main surface on the opposite side of the first main surface, wherein the first main surface and the second main surface are formed in no-parallel with each other.

Abstract: This nonaqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode, and a nonaqueous electrolyte. The negative electrode has a negative electrode core body and a negative electrode mixture layer formed on the surface of the negative electrode core body. The negative electrode mixture layer contains: a negative electrode active material which has a pore volume of 0.5 ml/g or less and in which a coating layer containing a first amorphous carbon and a second amorphous carbon is formed on the surfaces of graphite particles; and a third amorphous carbon serving as a conductive material. The nonaqueous electrolyte contains difluorophosphate and a lithium salt including an oxalate complex as an anion.

Abstract: Operating electric power is preferably supplied to a battery assembly control circuit from both a power converting device and a battery module. An electricity storage device includes a battery module including battery cells and a battery assembly control circuit, and a power converting device configured to charge the battery module with a commercial power supply and to supply electric power to a load. The power converting device supplies electric power to the battery assembly control circuit while an output voltage of the power converting device is higher than a predetermined voltage. The battery module starts to supply operating electric power to the battery assembly control circuit upon detecting that the electric power from the power converting device starts to be supplied to the battery assembly control circuit. The battery module stops supplying the electric power to the battery assembly control circuit when the battery module stops being discharged.

Abstract: A power supply device includes battery cells each having a rectangular external shape, a separator disposed between the battery cells, a pair of end plates that are disposed on respective ends of a battery assembly in which the separator and the battery cells are stacked, and a bind bar that binds the pair of end plates. The separator has insulating rib parts that protrude from both surfaces of the separator, and the insulating rib parts of the separator stacked on each surface of the battery cell are stacked on each other on a bottom surface of the battery cell. The insulating rib parts are stacked on each other on the bottom surface of the battery cell by inserting an insertion rib provided in one of the stacked insulating rib parts into an insertion groove provided in the other of the stacked insulating rib parts.

Abstract: Wound positive-electrode core body exposed pails are bundled and connected to a positive-electrode collector body. A tape is affixed straddling a separator positioned on the outermost surface of a winding electrode body, and the outermost surface of the wound positive-electrode core body exposed parts. The tape has a porous base material and an adhesive layer provided on the base material. The tape has a region in which the adhesive layer b is not provided on the base material a between the connection part between the tape and the separator positioned on the outermost surface of the winding electrode body, and the connection part between the tape and the outermost surface of the wound positive-electrode core body exposed parts.

Abstract: The positive electrodes each have a core-body exposed part at which a positive electrode core body is exposed, and a base part in which a composite material layer is formed on at least one surface of the positive electrode core body. The base part has formed therein a first region in which an active material is embedded in the positive electrode core body and a second region in which the the average embedment depth of active material embedded in the positive electrode core body is smaller than that in the first region. The second region is formed adjacent to the core-body exposed part.

Abstract: A secondary battery includes an electrode body having an electrode plate, a rectangular exterior body, a sealing plate, an electrode terminal, a first current collector arranged between the electrode body and the sealing plate and connected to the electrode terminal, a second current collector arranged between the electrode body and a side wall of the rectangular exterior body and connected to the first current collector, and a tab group formed such that multiple electrode tabs extending from the electrode plate toward the side wall are stacked on each other and connected to the second current collector. The tab group is connected to the second current collector, and is bent in parallel with the side wall. The curvature radius of a first rounded portion of a base portion of each tab is greater than the curvature radius of a second rounded portion of a tip portion of each tab.

Abstract: The cylindrical battery includes: an electrode body in which a positive electrode plate and a negative electrode plate are wound with a separator therebetween: an electrolyte; a bottomed cylindrical outer can that houses the electrode body and the electrolyte; and a sealing body that closes an opening of the outer can, wherein the sealing body includes a nipture plate that is caulked and fixed to the opening of the outer can with a gasket therebetween, and an external terminal that is not caulked and fixed to the opening of the outer can, the rupture plate has a valve part that is ruptured when an internal battery pressure rises, and the external terminal is fixed to an upper surface portion of a valve part.

Abstract: A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with a wound-type electrode body. A negative electrode has: a negative electrode collector; and negative electrode mixture layers that are formed on both lateral surfaces of the negative electrode collector, while containing at least a negative electrode active material and a binder. The negative electrode mixture layers include an inner negative electrode mixture layer that is positioned on the inner circumference side of the negative electrode collector and an outer negative electrode mixture layer that is positioned on the outer circumference side. The swelling degree of the binder contained in the outer negative electrode mixture layer is higher than the swelling degree of the binder contained in the inner negative electrode mixture layer; and the outer negative electrode mixture layer contains a binder that has a swelling degree of from 150% to 250%.

Abstract: The non-aqueous electrolyte secondary battery according to one embodiment of the present disclosure comprises a wound-type electrode body. A negative electrode has: a negative electrode current collector; a double-sided coated part in which a negative electrode mixture layer including a negative electrode active material and a binder is formed on the surface of the negative electrode current collector, and a negative electrode mixture layer is formed on both surfaces of the negative electrode current collector; and a one-sided coated part in which a negative electrode mixture layer is formed on one outer-periphery-side surface of the negative electrode current collector. At least a portion of the one-sided coated part is positioned on the outermost periphery of the electrode body. The swelling degree of the binder in the one-sided coated part is higher than the swelling degree of the binder in the double-sided coated part.

Abstract: In order to provide a battery module and the like capable of maintaining a fastened state of a plurality of battery cells with high reliability, battery module includes a plurality of battery cells each having electrode terminals, a pair of end plates that cover both side end surfaces of battery stack including the plurality of stacked battery cells, and a plurality of fastening members that fastens end plates to each other. End plate forms overlapping portion that covers at least a portion of each fastening member covering each side surface of battery cells located on the both side end surfaces of battery stack, and overlapping portion and the fastening members are welded and fixed. According to the above configuration, by welding in a state in which a side surface of fastening member is further covered with overlapping portion, there is an advantage that firm fixation can be achieved while preventing disengagement of fastening member.