Abstract: A non-aqueous electrolyte secondary battery of one example according to an embodiment has an output of 1,000 W or more. An electrode body includes a protective layer which contains an insulating inorganic compound and which is provided on at least one surface of a positive electrode, a negative electrode, and a separator, and has a heat capacity per unit battery capacity of 16 J/K·Ah or more. The positive electrode has a surface resistance of 0.5 to 40?.
Abstract: A nonaqueous electrolyte secondary battery includes a first electrode plate including a core plate and an active material layer including an active material and a binder, and disposed on a surface of the core plate; a second electrode plate; and a nonaqueous electrolyte. When the surface of the active material layer in contact with the core plate is taken as zero point, the amount of the binder in a 0%-10% thickness region X is 8.5 to 9.5 mass % of the total amount of the binder in the active material layer, the amount of the binder in a 90%-100% thickness region Y is 9.5 to 11.5 mass % of the total amount of the binder in the active material layer, and a binder-richest portion across the thickness of the active material layer resides in a 55%-100% thickness region across the thickness of the active material layer.
Abstract: An electrode body including a positive electrode plate and a negative electrode plate include a positive electrode tab portion at an end portion on a sealing plate side, a positive electrode collector electrically connected to the positive electrode plate include a collector body portion, a collector extension portion, a collector connection, and a collector connection portion. A pressure-sensitive current breaking mechanism includes a conductive member having an opening portion on an electrode body side, a deformation plate that seals the opening portion, and a collector body portion disposed on the electrode body side of the deformation plate and connected to the deformation plate. The collector extension portion is offset from the collector body portion and is disposed on the sealing plate side with respect to the collector body portion. Positive electrode tab portion is connected to the collector connection bent back at an end portion of the collector extension portion.
April 16, 2019
September 19, 2019
SANYO Electric Co., Ltd., Panasonic Corporation
Abstract: A cell voltage detection circuit is connected to each node of a plurality of cells connected in series by voltage detection lines, and detects the voltage of each of the cells. A total voltage detection circuit detects the voltage between the highest node and the lowest node of the cells. When the cell voltage of the highest cell or the lowest cell detected by the cell voltage detection circuit is abnormal, a controlling circuit compares the voltage detected by the total voltage detection circuit and a cell voltage sum obtained by adding the cell voltages of the cells detected by the cell voltage detection circuit. When the two voltages match, it is determined that the highest or the lowest cell is abnormal, and when the two voltages do not match, it is determined that a disconnection of the highest or the lowest voltage detection line has occurred.
Abstract: The present invention relates to a non-aqueous electrolyte secondary battery (30) which includes: a positive electrode (1); a negative electrode (2); a non-aqueous electrolyte containing a non-aqueous solvent; an outer package (5, 7, 19) receiving the positive electrode (1), the negative electrode (2), and the non-aqueous electrolyte; and a current interrupt valve (14) which interrupts a current in response to an increase in pressure inside the outer package (5, 7, 19). The positive electrode (1) contains a carbonate compound, the non-aqueous solvent contains a fluorinated cyclic carbonate and a fluorinated chain ester, and the total content of the fluorinated cyclic carbonate and the fluorinated chain ester is with respect to the total volume of the non-aqueous solvent, 50 percent by volume or more.
Abstract: A power supply device is provided with: a plurality of battery cells, each of which has a prismatic external form; a separator connected to each battery cell to cover at least a portion of the surface of the battery cell; and a fastening member that fastens a battery stack obtained by stacking the battery cells covered by the separator in a state where main surfaces face each other. The separator is formed from an insulating material which is elastically deformable, and provided with the main plate section covering the main surface of the battery cell disposed to face said section, a box-shaped covering section provided on a bottom part of the main plate section on a side of a first surface, and a corner covering section provided on a top part of the main plate section on the side of the first surface.
Abstract: There is provided a positive electrode active material for a nonaqueous electrolyte secondary battery capable of suppressing a decrease in the capacity retention ratio after high-temperature cycles. There is provided a positive electrode active material for a nonaqueous electrolyte secondary battery that includes a secondary particle formed by aggregation of primary particles formed of a lithium transition metal oxide. A rare-earth compound secondary particle formed by aggregation of particles formed of a rare-earth compound adheres to a recess formed between primary particles adjacent to each other on a surface of the secondary particle, and the rare-earth compound secondary particle adheres to both the primary particles adjacent to each other in the recess. The lithium transition metal oxide contains tungsten dissolved therein.
Abstract: A positive electrode plate including a positive electrode core and a positive electrode active material mixture layer formed on the positive electrode core is produced. The positive electrode plate includes a positive electrode exposed core portion at an end thereof. The positive electrode plate has a flat region in which the thickness of the positive electrode active material mixture layer is substantially uniform and an inclined portion in which the thickness of the positive electrode active material mixture layer gradually decreases from an end of the flat region toward the positive electrode exposed core portion. The positive electrode plate is cut such that a boundary between a main portion of the positive electrode plate and a positive electrode tab portion (40) is at the inclined portion. After that, the positive electrode active material mixture layer is compressed.
Abstract: A secondary battery includes an electrode body including a positive-electrode sheet and a negative-electrode sheet, an exterior body having an opening and accommodating the electrode body, a sealing body sealing the opening, a terminal electrically connected to the positive-electrode sheet and extending through a through-hole formed in the sealing body, and a conductive member connected to the terminal outside the sealing body. The conductive member includes a fuse. The fuse is covered by a cover. An insulating member is disposed between the conductive member including the fuse and the sealing body.
Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode plate having a positive electrode active material layer formed on a positive electrode core, a negative electrode plate having a negative electrode active material layer formed on a negative electrode core, and a flat-shape wound electrode body in which the positive electrode plate and the negative electrode plate are wound through a separator. Further, a protective layer is formed on the positive electrode active material layer or the negative electrode active material layer. The protective layer contains ceramic particles and a binder, and the average particle diameter (D50) and the average particle diameter (D90) of the ceramic particles are 1.0 ?m to 1.8 ?m and 3.0 ?m to 5.0 ?, respectively.
Abstract: Provided are a secondary battery and a battery pack including the secondary battery. A sealing plate has a positive electrode terminal attachment hole. A positive electrode terminal penetrates the positive electrode terminal attachment hole. An external conductive member is connected to a portion of the positive electrode terminal located on the battery outer side with respect to the sealing plate. The conduction path between a positive electrode plate and the positive electrode terminal is provided with a current interrupting mechanism. A first insulating member made of resin is disposed between the sealing plate and the positive electrode terminal. A second insulating member having higher thermal resistance than the first insulating member is disposed between the external conductive member and the sealing plate.
Abstract: A secondary battery includes a positive electrode plate including a positive electrode core body on which a positive electrode active material layer is formed and a positive electrode current collector joined to the positive electrode core body. The layered positive electrode core body includes a joined portion joined to a positive electrode current collector. When the product of the thickness of one layer of a portion of the positive electrode core body not joined to the positive electrode current collector and the number of layers of the positive electrode core body at the joined portion is Tp1, the joined portion includes a first region having a thickness less than Tp1 and a second region having a thickness more than Tp1 in a layered direction of the positive electrode core body.
Abstract: The present invention provides a fiber sizing agent composition containing a polyester resin (A) and a reactive compound (B), wherein the polyester resin (A) is a polyester resin having an HLB of 4 to 18 and a viscosity at 30° C. of 10 to 1,000,000 Pa·s, the reactive compound (B) is at least one reactive compound selected from the group consisting of blocked isocyanates, tertiary amines, tertiary amine salts, quaternary ammonium salts, quaternary phosphonium salts, and phosphine compounds, and the weight ratio of the polyester resin (A) to the reactive compound (B) [(A)/(B)] in the fiber sizing agent composition is 99.9/0.1 to 10/90.
Abstract: A cylindrical battery having a sealing unit which includes at least a valve member, a metal plate disposed farther inside the battery than the valve member and having a joint portion connected to the valve member, and an annular insulating member disposed between an outer peripheral portion of the valve member and an outer peripheral portion of the metal plate. The metal plate has a groove-shaped thin portion disposed around the joint portion, and straight portions that have different angles to the normal to the metal plate are disposed on an inner peripheral side and an outer peripheral side of a cross section of the thin portion perpendicular to the longitudinal direction.
Abstract: A vehicular power source device includes: a case incorporating a battery; a service plug coupled to the battery incorporated in the case; and a protection cover of the service plug. The protection cover includes: a covering portion of the service plug; a fixing board fixed to the case via a fastener; and an opening board disposed to be adjacent to the fixing board and providing a gap to the case. In addition, the fixing board includes: a fixing portion fixed onto the case via the fastener; a linking portion linking the fixing portion to the covering portion; and a breaking portion. The breaking portion is provided in the fixing portion or in a boundary portion between the fixing portion and the linking portion, and a breaking strength of the breaking portion is lower than that of the linking portion.
Abstract: An electrode for a nonaqueous electrolyte secondary battery that is less likely to cause loss of a mixture layer and that can ensure good cycle characteristics of the battery. An electrode for a nonaqueous electrolyte secondary battery of an exemplary embodiment includes a rectangular current collector and a mixture layer that contains an active material and a binder and that is formed on the current collector. The mixture layer covers at least one edge of four linear peripheral edges of the current collector, and the binder content in the mixture layer has a maximum value at a position 0.5 mm to 5.5 mm away from the one edge in a second direction that is perpendicular to a first direction along the one edge. The maximum value is more than 100% and 240% or less of the binder content at the center in the second direction of the mixture layer.
October 25, 2017
August 29, 2019
SANYO Electric Co., Ltd.
Yuta Fukutomi, Motoki Kinugawa, Tomofumi Yanagi
Abstract: A method for producing a secondary battery including an electrode body having a positive electrode plate and a negative electrode plate, a prismatic outer body having an opening and houses the electrode body, a sealing plate that seals the opening of the prismatic outer body, and a positive electrode external terminal that is electrically connected to the positive electrode plate and attached to the sealing plate. The method includes a fixation step of electrically connecting a first positive electrode current collector to a positive electrode external terminal and fixing the first positive electrode current collector to the sealing plate, a first connection step of weld-connecting a stack of a plurality of positive electrode tabs to the second positive electrode current collector, and a second connection step of weld-connecting the first positive electrode current collector to the second positive electrode current collector after the fixation step and the first connection step.
Abstract: In a non-aqueous electrolyte secondary battery including a positive electrode: a negative electrode; and a non-aqueous electrolyte, the negative electrode contains: coated graphite particles in each of which a first amorphous carbon and a second amorphous carbon having a higher electrical conductivity than that of the first amorphous carbon are fixed to a surface of a graphite particle; and a carboxymethyl cellulose having a weight average molecular weight of 3.7×105 to 4.3×105 or its salt. The non-aqueous electrolyte contains a difluorophosphate and a lithium salt which converts an oxalato complex to an anion.
Abstract: Battery block includes the following elements: a plurality of batteries each of which includes safety valve; positive electrode-side current collecting part for collecting current by connecting the positive electrode sides of batteries; and negative electrode-side current collecting part for collecting current by connecting the negative electrode sides of the batteries. In positive electrode-side current collecting part and negative electrode-side current collecting part, the part that includes safety valves is set to one side current collecting part. On the other side current collecting part opposite the one side current collecting part, fuse that fuses at a predetermined temperature is disposed on each of batteries.
Abstract: A housing of a fan motor according to the invention includes: board members provided at an interval in a rotational axis direction of a fan; a coupling portion which couples the board members to each other; a protrusion portion which is protruded toward a space other than an air course from the coupling portion, the space being between the board members other than the air courses; and a fixing portion which fixes a terminal that is provided in the protrusion portion and is connected to a wiring from a power source that supplies electricity to a motor. Other member, which crosses in an extending direction of the terminal from the protrusion portion to an edge portion of the board member, is not provided.