Abstract: A gasket (32), which is a cylindrical battery gasket having insulation properties and to be fitted with a sealing body (24) for sealing an opening of a bottomed exterior can (10) for a cylindrical battery. The gasket includes a bottom portion and a cylindrical circumferential wall rising upward from a peripheral portion of the bottom portion, and an inclined surface (32A) that expands an outer diameter of the circumferential wall to be larger than an inner diameter of an opening end portion (10A) of the exterior can toward an upward direction is provided around an entire outer circumference portion of the gasket, and the circumferential wall is shaped such that a wall thickness gradually increases toward an upper portion.

Abstract: An occurrence of a crack is prevented. The solid-state battery (1) includes: a battery body (2) including a laminate (40) in which a first electrode layer (10) and a second electrode layer (20) are laminated in a first direction (D1) with an electrolyte layer (30) interposed therebetween and an insulating layer (50) covering the laminate (40); and an external electrode (3) provided on a first end surface (2a) of the battery body 2, the first end surface (2a) facing a second direction (D2) orthogonal to the first direction (D1). In a cross-sectional view taken along the second direction (D2), an edge (11) of the first electrode layer (10) on a first end surface (2a) side is located on the first end surface (2a), an edge (21) of the second electrode layer (20) on the first end surface (2a) side is located inside the first end surface (2a), and a thickness (T1a) of a non-facing portion (61a) of the first electrode layer (10) and the second electrode layer (20) on the first end surface (2a) side is 0.

Abstract: A control unit is configured to determine success or failure of a rewrite process after end of the rewrite process, and write success or failure display data into a success or failure determination result storage area in accordance with the success or failure, and read the success or failure display data present in the success or failure determination result storage area after startup of an electronic device, and execute a control program, in lieu of carrying out the rewrite process, when it is determined that the success or failure display data indicate a success of the rewrite process.

Abstract: An alkaline storage battery of the present invention includes: an electrode group that includes a positive electrode, a negative electrode, and a separator located between the positive electrode and the negative electrode, which are stacked on top of each other; an outer can that is bottomed cylindrical shape having an opening at the top; a sealing body that seals the outer can; and a positive terminal electrically connected to the sealing body. The positive electrode includes a positive electrode body and a positive electrode protrusion protruding from a portion of the positive electrode body toward the sealing body to connect electrically to the sealing body. The negative electrode includes a negative electrode body and a negative electrode protrusion protruding from a portion of the negative electrode body toward the sealing body and terminating between the sealing body and the negative electrode body.

Abstract: A negative electrode for a zinc battery of the present invention includes a negative electrode mixture containing zinc oxide. In an X-ray diffraction pattern of the negative electrode mixture, the ratio (I002/I101) of the peak intensity (I002) of the (002) plane derived from the zinc oxide to the peak intensity (I101) of the (101) plane derived from the zinc oxide is 0.4 or more.

Abstract: A battery pack is provided in which the battery pack itself can recognize a determination of a full charge, which is made by a charger, without using a communication line. A battery pack is provided with a secondary battery, current measurement means for measuring a charging current for charging the secondary battery, and a control circuit which receives an output signal from the current measurement means. The control circuit determines that the secondary battery is fully charged when a reduction rate of the charging current in a unit time exceeds a predetermined value.

Abstract: A charging method for supplementarily charging a plurality of secondary batteries accommodated in a casing on a regular basis includes the steps of: charging the plurality of secondary batteries at the same time at the time of initial supplementary charging; acquiring each of peak temperatures during charging of the plurality of secondary batteries; listing combination patterns when the plurality of secondary batteries are split into a plurality of charging groups; predicting, for each of the combination patterns, each of the peak temperatures in a case in which charging is performed for each of the charging groups, on the basis of the peak temperatures at the time of the initial supplementary charging; and split-charging the plurality of secondary batteries in the combination pattern that minimizes a variation in the predicted peak temperatures.

Abstract: Provided is a nickel-hydrogen secondary battery comprising a sealing body that seals an opening of an outer can, the sealing body includes a sealing plate, and a positive electrode cap welded to the sealing plate, the positive electrode cap includes a cylindrical body section, an annular flange provided along a circumferential edge of an opening located at a base end of the body section, and a top wall provided to close a tip opposite to the base end, and a welded part between the sealing plate and the positive electrode cap is located at a position where a ratio of X to R in percentage is 0% or more and 2% or less, in which R is a length from a center C of the flange to an outer circumferential edge of the flange, and X is a length from an edge of the welded part on an outer side in a radial direction of the flange to the outer circumferential edge of the flange.

Abstract: A battery bank unit includes: a first battery bank and a second battery bank that are connected in parallel to each other; and a control apparatus that starts charging the second battery bank after the first battery bank is fully charged. The control apparatus calculates remaining time to complete charge of the battery bank unit based on a temperature of the battery bank unit at a start of the charge of the battery bank unit and a state of charge (SOC) of at least one of the first battery bank and/or the second battery bank at the start of the charge of the battery bank unit.

Abstract: This negative electrode for a zinc battery comprises a nonporous current collector and a negative electrode mixture layer which is held by the current collector and contains at least one of zinc, a zinc alloy, and a zinc-containing compound. The negative electrode has a current collector-exposed section in which the negative electrode mixture layer is not disposed, in a portion located at the outermost circumferential surface when wound.

Abstract: A battery voltage equalization device for an automotive battery formed from a plurality of batteries connected in series includes: a voltage measurement unit that measures respective battery voltages of the batteries; a current measurement unit that measures a charge-discharge current of the automotive battery; a cell balancing unit that equalizes the respective battery voltages of the batteries; and a control unit that performs a voltage equalization control through the cell balancing unit on the basis of the battery voltages measured by the voltage measurement unit. The control unit starts the voltage equalization control on the condition that the voltage equalization control is determined to be necessary on the basis of the respective battery voltages and that a discharge current of the automotive battery measured by the current measurement unit is determined to be stable.

Abstract: A battery voltage equalization device 1 includes: a transformer T including a primary winding T1 into which the output voltage of a battery pack BP is inputted and a plurality of secondary windings T2 corresponding to each of batteries B; a conversion circuit 2 that converts an AC voltage outputted by the secondary windings T2 to a DC voltage; a cutoff circuit 3 provided to cut off a conductive pathway from the conversion circuit 2 to the batteries B; and a control unit 5 that controls the energization of the primary winding T1, wherein the cutoff circuit 3 includes a first switch SW1 and the second switch SW2 which are provided in series on the conductive pathway and which are opened or closed by the control unit, a first body diode Db1 and a second body diode Db2 of which the same terminals are connected to each other and which are respectively connected in parallel with the switches, and a surge suppression resistor Rss connected in parallel with the first body diode Db 1 or the second body diode Db2 for w

Abstract: A packaging material for arranging and packaging a plurality of tubular batteries each having a tubular shape and having terminals formed on one end surface and the other end surface such that side surfaces of the batteries face each other, the packaging material having a side surface covering portion extending in parallel to an arrangement direction of the plurality of batteries and configured to cover the side surfaces of the plurality of batteries so that a surface of the side surface covering portion is in contact with the side surface. A re-peelable adhesive is applied to at least a part of the surface of the side surface covering portion.

Abstract: A battery bank unit includes: a first battery bank and a second battery bank that are connected in parallel to each other; and a control apparatus that performs collective charge for collectively charging the first battery bank and the second battery bank, performs first bank charge for charging only the first battery bank after the collective charge, and performs second bank charge for charging only the second battery bank after the first bank charge. The control apparatus calculates remaining time to complete charge of the battery bank unit based on a temperature of the battery bank unit at a start of the collective charge.

Abstract: A cylindrical battery includes a battery element, an outer can having a bottomed cylindrical shape with an opening on one side, a sealing body that seals the opening of the outer can, and a welded portion in which the outer can and the sealing body are welded. The outer can houses the battery element, and the welded portion extends in a first direction along a boundary between the outer can and the sealing body. A value obtained by dividing a maximum welding depth from an outermost surface of the welded portion in the first direction by a maximum thickness of a thickness of the outer can and a thickness of the sealing body is 0.4 or more and 1.5 or less.

Abstract: A battery 2 includes: a container 10; and an electrode group 6 housed in the container 10 together with an alkaline electrolyte liquid 4. The electrode group 6 includes a nickel electrode 14 as a positive electrode and a negative electrode 12 that are combined with a separator 8 interposed therebetween. The nickel electrode 14 includes a positive electrode core and a positive electrode mixture permeated in the positive electrode core. The positive electrode mixture contains nickel hydroxide that is a positive electrode active material. The nickel hydroxide contains a sulfate salt, and a weight rate of a S component contained in the sulfate salt to a Ni component in the nickel hydroxide is 0.28% or more and 1.50% or less.