Abstract: A control apparatus (2000) includes a control unit (2020). The control unit (2020) causes a charging apparatus (20) to perform charging of a lithium ion secondary battery (10), by controlling the charging apparatus (20). First, the control unit (2020) causes the charging apparatus (20) to perform the charging of the lithium ion secondary battery (10), until a voltage of the lithium ion secondary battery (10) becomes a predetermined voltage. Thereafter, the control unit (2020) causes the charging apparatus (2) to suspend the charging of the lithium ion secondary battery (10), until a predetermined time elapses. Therefore, the control unit (2020) causes the charging apparatus (20) to further perform the charging of the lithium ion secondary battery (10), after the suspending. The predetermined time is a time t [minute] that satisfies “t??A+B*x+C*y.” x[g/cm2] represents weight per unit area of a negative electrode of the lithium ion secondary battery (10). y [g/cm3] is density of the negative electrode.

Abstract: Provided is a positive electrode mixture for a secondary battery, the positive electrode mixture allowing provision of a secondary battery that exhibits a high capacity maintenance rate in a charge-discharge cycle. The positive electrode mixture for a secondary battery comprises a positive electrode active material, a binder, and an organic acid, wherein the positive electrode active material comprises a lithium nickel complex oxide having a layered crystal structure, the binder comprises a vinylidene fluoride-based polymer, and when a solution prepared by suspending the positive electrode active material in pure water has a pH of A, and the content of the organic acid per 100 parts by mass of the positive electrode active material is B parts by mass, A and B satisfy the following expression (1).

Abstract: A lithium ion battery (100) of the invention includes a battery main body (10) which includes one or more power generation elements configured by laminating a positive electrode layer, an electrolyte layer, and a negative electrode layer, in this order; an outer package (20) which includes at least a heat-fusion resin layer (21) and a barrier layer (23), and in which the battery main body (10) is sealed; and a pair of electrode terminals (30), each of which is electrically connected to the battery main body (10) and at least a part of which is exposed to the outside of the outer package (20).

Abstract: A battery pack (2000) includes a battery (2020), a contact-type switch (2040), a control unit (2060), and a sensor (2080). The battery pack (2000) is connected to a charger (10) through an electric power line (30). The battery (2020) is charged with a charging current supplied from the charger (10). The battery pack (2000) is connected to a load (20) through an electric power line (40). The contact-type switch (2040) is provided between the charger (10) and the battery (2020). The control unit (2060) turns off the contact-type switch (2040) in a case where a value detected by the sensor (2080) is equal to or smaller than a reference value decided based on specifications of the contact-type switch (2040).

Abstract: When the pressure in the battery case is increased, the gas discharge flow rate is secured sufficiently. This battery case (30) is a battery case in which a battery (2) is housed in a housing (10). The battery case (30) includes a gas discharge mechanism (G). The gas discharge mechanism (G) includes a gas discharge port (51) that opens in a wall plate (43) that covers a periphery of the housing (10), and a lid part (35m). The lid part (35m) is disposed to cover the gas discharge port (51) from inside the wall plate (43), and is fixed on the housing (10) side.

Abstract: A spacer is used with a unit cell that has a cell body including a power-generating element and formed to have a flat shape and an electrode tab extending out from the cell body. The first spacer has a protrusion, a recess, and an opening. The protrusion has a protruding shape and is inserted into a hole or notch provided on the electrode tab to guide the electrode tab. The first recess has a recessed shape, and is separated from the electrode tab around the base of the protrusion. The first opening allows a portion of the first recess to communicate with a side surface of the spacer.

Abstract: A secondary battery includes a power generation element that includes a positive electrode having a collector on which a positive electrode active material layer is disposed, an electrolyte layer for retaining an electrolyte, and a negative electrode having a collector on which a negative electrode active material layer is disposed. The negative electrode active material layer has an area greater than that of the positive electrode active material layer. The negative electrode active material layer has a facing portion that faces a positive electrode active material layer with an electrolyte layer interposed by therebetween, and a non-facing portion that is positioned on an outer periphery of the facing portion and does not face the positive electrode active material layer. The non-facing portion has a stretching rate that is less than a stretching rate of the facing portion.

Abstract: A spacer (first spacer 114) has an insulating property, is used in a battery pack 100, obtained by electrically interconnecting unit cells 110 that are stacked one atop another, by means of a bus bar 132 along the stacking direction (Z direction) of the unit cells, each having a cell body 110H, which includes a power-generating element 111 and is formed in a flat shape, and an electrode tab 112, which is drawn out from the cell body 110H and whose distal end portion 112d is folded along the thickness direction of the cell body 110H; and is provided between each of the unit cells. The first spacer has an abutting portion 114h, a recessed portion 114i, and a communicating portion 114j. The abutting portion abuts the distal end portion of the electrode tab along the stacking direction of the unit cells. The recessed portion is recessed in a direction intersecting the stacking direction of the unit cells so as to be separated from the distal end portion of the electrode tab.

Abstract: A method for assembling a battery pack having a cell group includes stacking the plurality of the unit cells such that distal end portions of the electrode tabs of the unit cells are bent along a stacking direction, disposing a pair of first cover members both ends of the unit cells in the stacking direction, disposing a pair of second cover members on both ends of the unit cells in a direction that intersects with the stacking direction, welding the first and second cover members while the cell group is pressurized using the first cover members. The welding of the first cover members and the second cover members is performed prior to electrically connecting the unit cells by a bus bar. The method further includes laser-welding the bus bar to distal end portions of the electrode tabs after the first cover members and the second cover members are welded.

Abstract: A non-aqueous electrolyte secondary battery with improved cycle durability includes a power generating element including a positive electrode obtained by forming a positive electrode active material layer containing a positive electrode active material on a surface of a positive electrode current collector, a negative electrode obtained by forming a negative electrode active material layer containing a negative electrode active material on a surface of a negative electrode current collector, and a separator, a ratio of a rated capacity to a pore volume of the separator being 1.55 Ah/cc or more, a ratio of a battery area to a rated capacity being 4.0 cm2/Ah or more, and a rated capacity being 30 Ah or more, wherein a variation in porosity in the separator is 4.0% or less.

Abstract: A roll electrode is provided with a core, an electrode, a fixing part and a regulating part. The core extends in an axial direction and has a substantially circular outer circumference. The electrode has an expansion coefficient lower than that of the core. The electrode wound into a roll shape on the outer circumference of the core. The fixing part is fixed to an end portion from which the electrode starts being wound around the core. The regulating part regulates the axial movement of the electrode wound into the roll shape with respect to the core.

Abstract: A battery pack includes a plurality of unit cells, a plurality of busbars, a support member and a busbar holder. The unit cells have electrode tabs. The busbars have connection portions joined to the electrode tabs. The support member supports the electrode tabs. The busbar holder retains the busbars. The busbar holder has pressing parts that press the connection portions of the busbars toward the electrode tabs supported by the support member, and deforming parts that urge the pressing parts with a repulsive force in a direction in which the pressing parts are caused to move toward the electrode tabs. The deforming parts have leg parts that extend so as to project in a direction away from the busbars.

Abstract: A battery module includes a cell stack in which a plurality of plate-shaped cells is stacked such that each main surface, which is a surface of each of the plate-shaped cells in a cell thickness direction, faces one another.

Abstract: A battery pack has a plurality of unit cells, a bus bar and a plate portion. The unit cells each includes a cell body having a power-generating element and being formed in a flat shape. Each unit cell has an electrode tab that extends out from a corresponding one of the cell bodies. The unit cells are stacked in a thickness direction of the cell bodies. The bus bar is electrically connected to the electrode tabs by laser welding. The plate portion forms a stacked structure together with the electrode tabs along an irradiation direction of the laser. Each electrode tab includes an anode-side electrode tab and a cathode-side electrode tab. The cathode-side electrode tabs have a different thickness than the anode-side electrode tabs. The plate portion is only provided on the ones of the anode-side electrode tabs and the cathode-side electrode tabs that have a smaller thickness.

Abstract: To provide a battery stack forming apparatus and a battery stack forming method that are capable of stacking electric cells with the electric cells accurately maintained in positions.

Abstract: A power supply device includes a plurality of battery packs, and a plurality of battery controllers having a master-slave configuration and corresponding to the plurality of battery packs in a one-to-one correspondence.

Abstract: In a lithium ion secondary battery element, a positive electrode and a negative electrode are overlapped on each other so that a positive electrode active material layer with a generally rectangular shape in the positive electrode and a negative electrode active material layer with a generally rectangular shape in the negative electrode are overlapped on each other substantially perfectly and a positive electrode active material non-applied part of the positive electrode and a negative electrode active material non-applied part of the negative electrode are positioned on opposing sides of the rectangle. A border part between the negative electrode active material applied part and the negative electrode active material non-applied part is positioned closer to a peripheral side of a negative electrode current collector than a peripheral part of a positive electrode current collector.

Abstract: [Problem] Provided are a stacked battery capable of improving a volume energy density while maintaining impact resistance, and a battery module includes a stacked battery. [Solution] The stacked battery 100 includes a power generation element 40 in which a plurality of electrodes 10, 20 and a plurality of separators 30 are alternately stacked, an exterior member 50 configured to accommodate the power generation element, first bonding portions 61 configured to bond the electrodes and the separators, and second bonding portions 62 configured to bond outermost layers 40a of the power generation element and an inner side 50a of the exterior member. The exterior member includes a joint portion 52 where peripheral edge portions 51 of the exterior member are overlapped and joined.

Abstract: A stacked battery includes: a power generation element in which a plurality of electrodes and a plurality of separators are alternately stacked; an exterior member in which the power generation element is accommodated together with an electrolytic solution; and a bonding portion configured to bond an outermost layer of the power generation element and an inner side of the exterior member, wherein when the power generation element is viewed in a plan view from a stacking direction in which the electrodes and the separators are stacked, the bonding portion is located outside an effective region contributing to power generation in the power generation element and has a shape in which an outer peripheral edge of the bonding portion is continuous over an entire circumference of the bonding portion.

Abstract: A laminated cell (100) of the present invention includes a laminated body (120) formed by sequential stacking a negative electrode (130), a separator (170, 180), a positive electrode (150), and a separator (170, 180). At least one of surfaces of the positive electrode (150) or the negative electrode (130) in a stacking direction (S) has a portion to which a resin member (190) is bonded. The separators each have a portion bonded to the resin member (190) on a side facing the at least one of surfaces. In the present invention, since the separators and at least one of the positive electrode and the negative electrode are integrated together, misalignment in a stacking work can be easily suppressed and the laminated cell has excellent productivity.