Abstract: The purpose of the present disclosure is to prevent, in a nonaqueous electrolyte secondary battery, a tape adhered to an outermost peripheral surface of an electrode group from breaking due to charging and discharging. A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure includes a winding-type electrode group and tapes adhered to an outermost peripheral surface of the electrode group so that an electrode group winding end E is fixed to the outermost peripheral surface of the electrode group. The tapes include: two adhesive regions including a substrate layer and an adhesive layer; and a non-adhesive region sandwiched between the two adhesive regions and consisting only of the substrate layer. The non-adhesive region is disposed so as to extend across the winding end E, which is positioned on the outermost periphery of the electrode group, in the winding direction.

Abstract: A method of manufacturing a secondary battery including an electrode body element fabricating step in which a first electrode body element including a positive electrode plate and a negative electrode plate, and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a tab-connecting step in which a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a second positive electrode collector, and a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a second negative electrode collector, and an electrode body fabricating step in which, after the tab-connecting step, the first electrode body element and the second electrode body element are unified.

Abstract: A battery pack includes: a plurality of secondary battery cells connected to each other in series and/or in parallel; and a housing case that includes a plurality of battery housing spaces for housing the plurality of secondary battery cells. A number of the plurality of battery housing spaces is larger than a number of the plurality of secondary battery cells. A heat absorber is disposed in the battery housing space where the secondary battery cell is not housed.

Abstract: In order to detect a cell voltage with high accuracy during an equalizing process among a plurality of cells, during execution of the equalizing process among the plurality of cells, controller measures a value of a current flowing to a negative electrode of an nth cell through an nth discharge resistor, calculates an (n?1)th voltage drop value due to a wiring resistance value of an (n?1)th wiring and an nth voltage drop value due to a wiring resistance value of an nth wiring based on the measured current value, and the wiring resistance value of the (n?1)th wiring connected to a positive electrode of the nth cell and a wiring resistance value of the nth wiring connected to the negative electrode of the nth cell, the wiring resistance value of the (n?1)th wiring and the wiring resistance value of the nth wiring being measured in advance, and, based on the (n?1)th voltage drop value and the nth voltage drop value, corrects the voltage value of the nth cell, a voltage value of an (n?1)th cell, and a voltage val

Abstract: An insulating plate for a secondary battery includes a wound electrode group, an electrolyte, a cylindrical battery case that houses the electrode group and the electrolyte, and a sealing body that seals an opening of the battery case and includes a discharge valve. The insulating plate is disposed between the electrode group and the sealing body and has a disk shape with a thickness T of 0.1 mm or more. The insulating plate has a first hole formed centrally therein and at least one second hole formed around the first hole so as to extend along the outer periphery of the disk shape. The ratio (=T/D) of the thickness T to a diameter D of the insulating plate is 0.016 or less, and the insulating plate has an opening ratio of 36% or less.

Abstract: A battery comprises a first polarity terminal that is attached via a first insulating member to an opening of an outer case. A first polarity plate includes: a first core formed of a conductive material; and a first active material layer. A first drawn-out portion is formed from a side of the first core on the first polarity terminal side thereof being drawn further out than a side of the first active material layer on the first polarity terminal side thereof. The first drawn-out portion includes a first bent portion that is bent towards the radially inner or outer side of the electrode body. A first surface of a first polarity collector plate contacts the surface of the first bent portion on the first polarity terminal side, and the first polarity terminal connects directly or via a conductive member to a second surface of the first polarity collector plate.

Abstract: A battery pack includes a current detector configured to detect a charging current to secondary battery, a drive circuit configured to drives a charge switch based on the charging current detected by the current detector, a charge controller configured to control operation of the charge switch by the drive circuit, a monitoring unit configured to monitor operation of charge controller, and a judging unit configured to instruct, based on the charge controller and the monitoring unit, the charge switch to be able to or unable to operate.

Abstract: A bobbin structure of an armature of a three-phase motor having 6N (N is a natural number) slots and 3N coils per phase, the bobbin structure including: a main pole into which a winding bobbin around which a coil is wound is inserted; and an auxiliary pole into which an empty bobbin around which the coil is not wound is inserted. The main pole and the auxiliary pole are placed in a circumferential direction with respect to a rotation axis, and a contact portion where the empty bobbin and the winding bobbin are in contact with each other is formed on each of an outer peripheral side and an inner peripheral side of the slot formed between the main pole and the auxiliary pole.

Abstract: A voltage measurement unit measures voltages of the plurality of cells connected in series. A plurality of discharge circuits are connected in parallel to the plurality of cells, respectively. A controller controls, based on the voltages of the plurality of cells detected by voltage measurement unit, the plurality of discharge circuits to make the voltages or capacities of the plurality of cells equal to a target value. The controller determines a number of cells to be discharged among the plurality of cells in accordance with an allowable temperature of a substrate having the plurality of discharge circuits.

Abstract: A battery pack includes: a first secondary battery cell and a second secondary battery cell each having a cylindrical shape and connected in series and/or in parallel with each other; a housing case; and a longitudinal partition plate having a thermal insulation property, and disposed at an interface between the first secondary battery cell and the second secondary battery cell housed in the internal space of the housing case. The longitudinal partition plate constitutes a first thermal insulator that projects from a side facing the side surface of the cylindrical shape of the first secondary battery cell, and constitutes a second thermal insulator that projects from a side facing the side surface of the cylindrical shape of the second secondary battery cell.

Abstract: The power supply device including: a plurality of secondary battery cells each including a gas discharge valve for discharging internal gas; a plurality of voltage detection lines for detecting voltage of the corresponding plurality of secondary battery cells; a plurality of current fuses provided in the respective plurality of voltage detection lines to shut off current flow when currents flowing through the respective voltage detection lines exceed a predetermined value; and gas guide path communicating with the gas discharge valve to discharge gas discharged from the gas discharge valve to the outside. At least one of the plurality of current fuses is disposed in gas guide path, and is composed of thermal fuse that shuts off current flow depending on temperature of the gas discharged from the gas discharge valve.

Abstract: A pair of end plates are disposed at both end surfaces of a battery stack in which the plurality of battery cells are stacked, end plates are coupled to a bind bar, the battery stack is sandwiched between the end plates to be held, an elastic sheet that is elastically deformable in a thickness direction is disposed in a compressed state between the bind bar and a facing side surface of the battery stack, and the elastic sheet in the compressed state elastically holds the battery stack and the bind bar in a pressurized state.

Abstract: The purpose of the present disclosure is to provide a non-aqueous electrolyte secondary battery capable of suppressing deformation such as bending of a positive electrode and a negative electrode when an electrode body expands. The non-aqueous electrolyte secondary battery that is an example of the embodiment of the present disclosure has a wound electrode body in which a band-shaped positive electrode and a band-shaped negative electrode are wound with a separator interposed therebetween, and a cylindrical metal outer body accommodating the electrode body.

Abstract: A non-aqueous electrolyte secondary battery that is an exemplary embodiment of the present invention, wherein a positive electrode contains a lithium-transition metal composite oxide containing Ni, Al and Sr as a positive electrode active substance. In the lithium-transition metal composite oxide, the content of Ni is 80-95 mol %, the content of Al is 8.0 mol % or less, the content of Sr is 1.2 mol % or less, and the proportion of metallic elements other than Li that are present in a Li layer is 0.5-2.0 mol %. A negative electrode has a Sr-containing coating film formed on a surface of a negative electrode mixture layer. The content of Sr in the coating film is 20-400 ppm relative to the total mass of the negative electrode mixture layer and the coating film.

Abstract: A power supply device includes secondary battery cells disposed adjacent to each other and a separator that is interposed between the secondary battery cells adjacent to each other. The separator is made of a flexible material that has both a heat insulating property and restoring force such that the separator deforms when being pressed by each of the secondary battery cells and recovers an original shape of the separator. This configuration provides an improved heat insulating property between the secondary battery cells and prevents thermal propagation caused by thermal runaway. At the same time, this allows the separator to adapt to deformation of a secondary battery cell that has thermally swelled. In response to contraction of the swelled battery, the separator recovers its original shape to maintain a mechanical pressing force. This allows the power supply device to provide increased mechanical stability and maintain resistance to vibration and impact.

Abstract: A method includes a step A of ultrasonic-joining stacked metal foils to each other and a step B of ultrasonic-joining all of the joined metal foils and a metal plate to each other after the step A. The step A is performed by transmitting ultrasonic vibrations to a horn with the stacked metal foils being interposed between the horn and an anvil and pressed. The step A includes a first joining step of solid-state-joining at least some metal foils of the stacked metal foils that are located near the horn to each other, and a second joining step of solid-state-joining all of the stacked metal foils to each other after the first joining step. The second joining step is performed within a joined region that is joined at the first joining step.

Abstract: The secondary battery includes an electrode body that includes a positive electrode plate and a negative electrode plate, an outer body that has an opening and houses the electrode body, a sealing plate that seals the opening of the outer body, a positive electrode tab that is provided in the positive electrode plate, a positive electrode external terminal that is electrically connected to the positive electrode plate and attached to the sealing plate, and a positive electrode current collector and a second positive electrode current collector that electrically connect the positive electrode tab and the positive electrode external terminal. The first positive electrode current collector has a current collector protrusion. The second positive electrode current collector has a current collector opening. The current collector protrusion is positioned in the current collector opening. The current collector protrusion and the edge of the current collector opening are weld connected to each other.

Abstract: In a battery pack, an exterior case accommodates therein a core pack including battery blocks coupled to one another. Each battery cell includes battery cells held at predetermined positions by a battery holder. Each battery block includes exhaust passage passing through the battery holder. The core pack has a valve-side end surface arranged at a first end thereof, and includes a partition wall between battery blocks coupled to one another. The partition wall has a through-hole opening at a position facing the exhaust passage. In the core pack, the exhaust passage formed in each battery block and the through-hole formed in partition wall are arranged on a straight line to constitute an exhaust duct for the exhaust gas. The exhaust gas discharged from the valve-side end surface arranged at the first end passes through the exhaust duct and then is discharged from an exhaust portion to an outside.

Abstract: A power supply device having a battery block with a terminal surface on which terminals of a plurality of battery cells are arranged side by side, and a side plate with an elastic part, a holding part and a body part that extends along the side surfaces of the battery block. The elastic part faces the terminal surface and the holding part faces the bottom surface of the battery block. An insulation part is disposed between the elastic part and the battery block and has a positioning region and a pressing region that are disposed on one surface of the insulation part so as to face the elastic part. The positioning region is provided at an end of the insulation part located at the body part side, and extends to a position that is separated farther away from the elastic part than the pressing region.

Abstract: Provided is a method for manufacturing a secondary battery including a stacked electrode body including a plurality of positive electrode plates (1) and a plurality of negative electrode plates, the positive electrode plates (1) each having a positive electrode active material layer (1b) formed on a positive electrode substrate (1a), a positive electrode substrate exposed portion where the positive electrode active material layer (1b) is not formed on the positive electrode substrate (1a) being provided as a positive electrode tab portion (1e) at the end of the positive electrode plate (1). The method includes a cutout forming step of providing a cutout in a region at the base of the positive electrode plate (1) where the active material layer (1b) is formed, and a compressing step of compressing the positive electrode active material layer (1b) after the cutout forming step.