Abstract: A separator having both high adhesion to electrodes and high impregnating ability of a nonaqueous electrolyte is provided. The separator disclosed here includes a base material layer of a porous resin, and a ceramic layer containing inorganic particles and disposed on at least one surface of the base material layer. Principal surfaces of the separator have long sides. The separator further includes an adhesive layer having portions arranged at a predetermined pitch to form a stripe pattern on at least one of the principal surfaces. An angle formed by the adhesive layer and the long side of the at least one principal surface of the separator is 20° or more and 70° or less.

Abstract: A battery module includes: a plurality of battery cells stacked in a predetermined direction and electrically connected together; a plurality of bus bars that electrically connect the plurality of battery cells together; and a plurality of voltage detection wires each connected to one set of two or more battery cells electrically connected together. According to the battery module, the number of the voltage detection wires is reduced, thereby attaining reduced sizes of the bus bars, productivity improved by improved workability, and reduced cost.

Abstract: A battery module includes: a plurality of battery cells arranged side by side in a first direction, each of the plurality of battery cells having a prismatic shape; and a partition wall portion provided between the plurality of battery cells to secure electrical insulation between the plurality of battery cells. The partition wall portion includes a first partition wall portion and a second partition wall portion, the first partition wall portion and the second partition wall portion being provided alternately, the second partition wall portion having a shape different from a shape of the first partition wall portion, the second partition wall portion forming a cooling space between the second partition wall portion and each of two battery cells located on both sides beside the second partition wall portion in the first direction.

Abstract: A method for producing a secondary battery includes a space formation step and an injection molding step. In the space formation step, an outer periphery of a resin blocking portion with a quadrangular prism shape, in a terminal, is plugged to form a resin injection space around the terminal. In the injection molding step, a resin is injected into the injection space. The space formation step includes a constant-dimension pressing step and a constant-pressure pressing step. In the constant-dimension pressing step, a section between a pair of first outer peripheral surfaces of the resin blocking portion, extending parallelly to each other is pressed, whereby a distance between the first outer peripheral surfaces is brought to a predetermined distance. In the constant-pressure pressing step, a section between a pair of second outer peripheral surfaces of the resin blocking portion, extending in a direction intersecting the first outer peripheral surfaces, is pressed.

Abstract: A secondary battery disclosed here includes; an electrode body; a battery case including a case body and a lid; an external terminal; and a gasket insulates the lid and the external terminal at an outer side of the battery case. The lid has an attachment hole to which the external terminal is attached. The external terminal includes a shaft inserted in the attachment hole and a head extending radially outward from one end of the shaft. The gasket includes a bearing portion disposed between a bottom surface of the head and the lid, and a side wall rising upward from the bearing portion. The head has a chamfered portion in which at least a part of as outer periphery of the bottom surface. A gap is formed between the chamfered portion and each of the bearing portion and the side wall.

Abstract: A battery stack includes cells that are arranged in a row and bound together. Each of the cells includes a case and an electrode body accommodated in the case. The cells include multiple types of position variation cells, in which positions of electrode bodies of the cells are different from each other when the cells are viewed in an arrangement direction of the cells.

Abstract: A manufacturing method for the secondary battery includes a first preparation step for inserting a terminal formed in an oval like shape and having a cylindrical shaft part into an attachment hole formed on a sealing plate of the secondary battery, a second preparation step for arranging a conductive member on a surface at a side where the shaft part of the sealing plate protrudes, a first caulking step for using a caulking tool that includes a tip end part formed in an oval like shape and includes a base end part formed in a complete round shape whose diameter is larger than the tip end part, to insert the tip end part into the shaft part, so as to make the base end part expand an inner diameter of the shaft part, and a second caulking step for pressing an expanded portion of the shaft part to be flat.

Abstract: Provided is a technology to suppress a decrease in airtightness around a liquid injection port of a secondary battery. A secondary battery disclosed here has a lid having a liquid injection port, a resin washer attached to the liquid injection port, and a sealing member. The sealing member has a sleeve inserted into the liquid injection port and a flange extending from the sleeve along an outer surface of the lid in an outer diameter direction. The resin washer is installed in the liquid injection port and is sandwiched between the flange and the outer surface of the lid. A protrusion protruding toward the outer surface of the lid is provided at a radial intermediate portion of the flange. A restricting portion that restricts an outer edge of the resin washer is provided in the lid or the sealing member.

Abstract: Provided is a technique for accommodating current collector tabs joined to current collector terminals inside a battery case in a better state. The secondary battery disclosed herein has an electrode body, a battery case that accommodates the electrode body, and current collector terminals attached to the battery case. The electrode body has a plurality of current collector tabs. The plurality of current collector tabs have a portion where the current collector tabs are bundled in a stacked state and a portion joined to the current collector terminal.

Abstract: Provided is a novel method of producing nickel sulfate from nickel oxide. The method of producing nickel sulfate herein disclosed includes a step of feeding nickel oxide particles and an acid aqueous solution into a pressure resistant container, a step of heating the pressure resistant container in a sealed state to a temperature exceeding 100° C. to obtain a mixed liquid in which nickel oxide is dissolved, and a step of forming nickel sulfate, using the mixed liquid.

Abstract: A battery includes: an electrode assembly and an electrolyte solution; an exterior container that is provided with an injection hole; and a sealing member that is fixed to the exterior container by swaging. The sealing member includes: a first member having a stem portion; and a second member having an engagement portion engaged with the stem portion. The stem portion has an abutment surface with which the engagement portion is in abutment, and a swaging-fixation portion formed to be located between an inner surface of the exterior container and the engagement portion so as to fix the sealing member to the exterior container. A relation of 0.55?B/A is satisfied between a thickness (A) of a portion of the exterior container in which the injection hole is formed and a distance (B) between the abutment surface of the stem portion and the inner surface of the exterior container.

Abstract: A charging and discharging control device disclosed herein controls a charging and discharging device that charges and discharges an on-vehicle battery mounted on an electric vehicle. The charging and discharging control device includes a detection controller configured or programmed to detect that the electric vehicle has been connected to the charging and discharging device, an SOC acquisition controller configured or programmed to acquire an SOC of the on-vehicle battery, a use information acquisition controller configured or programmed to acquire a next use time and a next travel distance of the electric vehicle, and a setting controller configured or programmed to set a charging and discharging schedule of the on-vehicle battery such that the on-vehicle battery is charged after having been maintained in a low SOC and a necessary SOC for the next use time and the next travel distance remains.

Abstract: A smart grid information processing apparatus is applied to a smart grid including a transmission grid being connected to a plurality of electrical equipment units and a communication network transmitting information of at least an amount of electric energy transmitted through the transmission grid. The information processing apparatus is configured to execute a first recording process and a withdrawal process. The first recording process is a process of recording virtual electrical storage capacities in association with respective users, each of the virtual electrical storage capacities corresponding to an amount of electric energy in which a corresponding user is allowed to receive from the smart grid. The withdrawal process is a process of reducing the virtual electrical storage capacity of the user according to an amount of electric energy that has been received by the user from the transmission grid.

Abstract: In a method for inspecting the insulation property of a secondary battery by connecting an external DC power supply to the secondary battery charged with an initial charge amount and evaluating the insulation property of the secondary battery based on a converging state of a power-supply current, when a charge amount at which an inclination of a tangent to a charge amount—battery voltage curve representing a relationship between the charge amount and a battery voltage of the secondary battery is smallest is assumed as a minimum-inclination charge amount, and the inclination of the tangent at the minimum-inclination charge amount is assumed as a minimum inclination (?L), the initial charge amount is selected from a range of the charge amount in which the inclination is two or more times the minimum inclination.

Abstract: A nonaqueous electrolyte rechargeable battery includes an electrode body, a nonaqueous electrolyte, and a rectangular box-shaped battery case accommodating the electrode body and the nonaqueous electrolyte. The electrode body includes a positive electrode including a positive base and a positive composite material layer, a negative electrode including a negative base and a negative composite material layer, and a porous resin separator disposed therebetween. The electrode body has a low profile when the positive electrode, the negative electrode, and the separator are laminated and rolled. When spring constant of the nonaqueous electrolyte rechargeable battery with a load of 316 to 210 N/cm2 and 95 to 74 N/cm2 is respectively referred to as spring constant H and spring constant L, the ratio L/H is 0.34 or greater and 0.41 or less. A resistance increase rate between before and after a square wave test is less than or equal to 1.17.

Abstract: A secondary battery with a reduced degree of increase in internal pressure over time, is provided. In a preferred embodiment, a secondary battery including: an electrode body, a battery case, an electrode terminal, and a gasket sandwiched between the battery case and the electrode terminal is provided. The secondary battery is configured such ghat a parameter K calculated using the following equation (1): K=Wi/(VrGH2) (1) (where Wi represents an initial capacity (Ah) of the secondary battery, Yr represents a volume (cm3) of void in the battery case, and GH2, represents an H2 gas permeability coefficient (cm3·cm)/(cm2·s·cmHg) of the gasket at 60° C.) satisfies 0.43×108 or more to 0.59×108 or less.

Abstract: A lithium-ion rechargeable battery includes an electrode body rolled about a roll axis to be low-profile. In a cross section orthogonal to the roll axis, the electrode body includes a planar flat portion pressed to have a low profile and two semicircular rod-shaped bent portions bent and formed on opposite ends of the flat portion. Combined resistance of reaction resistance caused by an inter-electrode distance with solution resistance caused by air permeance of the separator in site, longitudinally extending from center to a peripheral surface of each bent portion, equals combined resistance of the reaction resistance with the solution resistance in site, extending from straight line to a peripheral surface of the flat portion in a thickness-wise direction, to obtain uniform resistance of the electrode body, thereby limiting deposition of lithium metal caused by non-uniform current density.

Abstract: A power storage device includes: a stack of a plurality of power storage cells stacked in a first direction; and a case that accommodates the stack. The case includes a first portion and a second portion facing respective end surfaces of the stack, a third portion and a fourth portion facing respective side surfaces of the stack, and a fifth portion and a sixth portion respectively facing an upper surface and a bottom surface of the stack. The first portion and the second portion are in abutment with the respective end surfaces of the stack, and each receive a force from the stack in the first direction. The stack is supported by the case along the first direction with the force received by the first portion and the second portion in the first direction being transmitted to all of the third portion to the sixth portion.

Abstract: An in-vehicle battery management device includes a controller configured or programmed to control a charge/discharge device such that the charge/discharge device performs charge or discharge on an in-vehicle battery of an electric vehicle in a predetermined processing condition, the in-vehicle battery being connected to the charge/discharge device. The controller includes a calculator configured or programmed to calculate a degree of deterioration progress of the in-vehicle battery based on charge/discharge information in the charge or discharge; and a communicator configured or programmed to notify a predetermined notification target of the calculated degree of deterioration progress.

Abstract: A battery, in which a damage on an electrode tab group is suitably inhibited, is provided. The herein disclosed battery satisfies D1>D2 in the case where a length of an interval from a first end part existing in a surface direction along the first side wall to a positive electrode tab join part is treated as D1 and a length of an interval from a second end part to a negative electrode tab join part in the above described surface direction is treated as D2.