Abstract: This nonaqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, and a nonaqueous electrolyte. The negative electrode includes a negative electrode core and a negative electrode mixture layer formed on at least one surface of the negative electrode core. The ratio (E1/E2) of the charging expansion rate (E1) to the discharge expansion rate (E2) of the negative electrode is at least 1.05 and less than 1.15. The content of silicon material with respect to the mass of a negative electrode active material in the negative electrode mixture layer is 3-12 mass %. Graphite, a first silicon material (SiO), and a second silicon material (LSX) are preferably included as the negative electrode active material in the negative electrode mixture layer.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a lithium ion conductive nonaqueous electrolyte, wherein the negative electrode contains graphite, an open circuit potential of the negative electrode in a fully charged state is 70 mV or less relative to lithium metal, the nonaqueous electrolyte contains a solvent, a cation, and an anion, the solvent contains a fluorine-containing cyclic carbonic acid ester, the cation includes lithium ions, and the anion includes an oxalate complex anion.

Abstract: A non-aqueous electrolyte secondary battery with a negative electrode active material including a carbon material, and a silicon-containing material in which Si particles are dispersed in a lithium ion conductive phase. The negative electrode material mixture layer having a thickness T0 includes a first region on the negative electrode surface side having a thickness of T1, and a second region on the negative electrode current collector side, and the ratio T1/T0 is 1/20 to 19/20. The ratio of a mass ratio MS1 of the silicon-containing material in the first region to a mass ratio MS2 of the silicon-containing material in the second region is not less than 0 and less than 1. An open circuit potential of the negative electrode in a fully charged condition is higher than 0 mV and 70 mV or lower relative to lithium metal.

Abstract: A non-aqueous electrolyte secondary battery, wherein a negative electrode includes a negative electrode mixture layer having a thickness T and a negative electrode current collector, the negative electrode active material includes carbon and Si-containing materials, wherein when the negative electrode mixture layer is divided into a first region having a thickness of T/2 on the surface side of the negative electrode and a second region having a thickness of T/2 on the negative electrode collector side, a mass ratio of the first to the second composite material contained in the first region is >1, a mass ratio of the first composite to the second composite material contained in the second region is <1, and, in a fully charged condition, an open circuit potential of the negative electrode is 0 V or more and 70 mV or less with respect to a lithium metal.

Abstract: A non-aqueous electrolyte secondary battery, including a positive electrode, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and an electrolytic solution including a solvent and an electrolyte. The negative electrode includes a negative electrode material containing a lithium silicate phase and silicon particles dispersed in the lithium silicate phase. The silicon particles are contained in the negative electrode material in an amount of 30 mass % or more, relative to a total mass of the lithium silicate phase and the silicon particles. The electrolytic solution contains an ester compound C of an alcohol compound A and a carboxylic acid compound B, and contains at least one of the alcohol compound A and the carboxylic acid compound B in an amount of 15 ppm or more, relative to a mass of the electrolytic solution.

Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and an electrolytic solution containing a solvent and an electrolyte. The positive electrode includes a positive electrode material containing a lithium-nickel composite oxide represented by LiaNibM1?bO2, where M represents at least one selected from the group consisting of Na, Mg, Sc, Y, Mn, Fe, Co, Ni, Cu, Zn, Al, Cr, Pb, Sb and B, 0.95?a?1.2, and 0.8?b?1. The electrolytic solution contains an ester compound C of an alcohol compound A and a carboxylic acid compound B, and contains at least one of the alcohol compound A and the carboxylic acid compound B in an amount of 15 ppm or more, relative to a mass of the electrolytic solution.

Abstract: A lithium ion secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte having permeated the positive electrode, the negative electrode and the separator. The nonaqueous electrolyte includes a lithium salt and a nonaqueous solvent in which the lithium salt is dissolved. The lithium salt concentration in the nonaqueous electrolyte present within the positive electrode is higher than the lithium salt concentration in the nonaqueous electrolyte present within the negative electrode.

Abstract: A non-aqueous electrolyte secondary battery comprises a stacked electrode assembly in which the positive electrode plates with a large area and the negative electrode plates with a large area are stacked interposing separators therebetween, and a non-aqueous electrolyte containing non-aqueous solvent. The positive electrode plate as the positive electrode active material comprises a lithium transition-metal composite oxide expressed by Lia(NibCocMnd)MeO2 (1.05?a?1.20, 0.3?b?0.6, b+c+d=1, 0?e?0.05, and M is at least one element selected from the group consisting of Ti, Nb, Mo, Zn, Al, Sn, Mg, Ca, Sr, Zr, and W), and the proportion of a chain carbonate contained in the non-aqueous solvent to the non-aqueous solvent is 50% by volume or more, and the proportion of diethyl carbonate contained in the chain carbonate to the chain carbonate is 70% by volume or more.

Abstract: An electrode for a non-aqueous electrolyte battery has a current collector; and an electrode active material layer formed on the current collector, the electrode active material layer containing an electrode active material and carboxymethylcellulose. The weight of the electrode active material layer is at 250 g/m2 to 350 g/m2; the degree of etherification of the carboxymethylcellulose is from 0.5 to 1.0; the average degree of polymerization of the CMC is from 1600 to 1800; and the amount of the carboxymethylcellulose is set at from 0.4 mass % to 0.75 mass % with respect to 100 mass % of the electrode active material.

Abstract: A stack type battery has a stacked electrode assembly (10) in which a plurality of positive electrode plates (1) and a plurality of negative electrode plates (2) are alternately stacked one another across separators. Each one of pairs of the separators adjacent to each other in a stacking direction has a bonded portion (4) in which the separators are bonded to each other in at least a portion of a perimeter portion thereof, so as to form a pouch-type separator (3). The proportion of the bonded portion (4) of one of the pouch-type separators 3 (low blocking rate pouch-type separator (3L)) located in a stacking direction-wise central region of the stacked electrode assembly (10) is made smaller than the proportion of the bonded portion (4) of each of the pouch-type separators 3 (high blocking rate pouch-type separator 3H) located in both stacking direction-wise end portions of the stacked electrode assembly (10).

Abstract: Stacked positive and negative electrode current collector tabs are bundled respectively in such a manner as to be gathered at one stacking direction-wise side (the upper end side) of the stacked electrode assembly. Portions of the bundled tabs extending from the bundled portion toward a tip side of the bundled tabs are bent toward the other stacking direction-wise side (lower end side) of the stacked electrode assembly, to form bent portions. The stacked electrode assembly is covered and fixed by an insulating sheet having insulation capability so as to cover both stacking direction-wise end faces thereof and surround the stacked electrode assembly in a tubular shape. A portion (slip-in piece) of the insulating sheet is inserted between the stacked electrode assembly and the bent portions of the positive and negative electrode current collector tabs. A portion (outer cover piece) of the insulating sheet covers the bent portions of the positive and negative electrode current collector tabs from outside.

Abstract: A prismatic secondary battery is a prismatic lithium-ion battery including a stack-type electrode assembly in which square positive and negative electrode plates are stacked with separators interposed therebetween. The positive electrode plates are arranged inside a bag-like separator. The width of the separator protruding from an end portion of each positive electrode plate on a non-joined side of the separator is greater than that of the separator protruding from an end portion of the positive electrode plate on a joined side of the separator. The heat-shrinkage rate of the separator in a direction vertical to the non-joined side is greater than that of the separator in a direction parallel to the non-joined side. Short circuiting between the positive and negative electrode plates due to heat shrinkage or rupture of the separator is prevented even when abnormal heat generation occurs in the battery.

Abstract: The present invention aims to provide a battery that includes electrode terminals passing through a lid, in which the lid and electrode terminals are securely insulated and sealed while being solidly fixed to each other without using an insulation-forming body or packing. To this end, a lid has upwardly-protruding protrusions formed therein. Through-holes are formed in the protrusions and tapered so as to become narrower toward the top relative to the bottom. Fitting portions forming the middle portions of a cathode terminal board and an anode terminal board are tapered to fit into the through-holes. Heat-welding tape is introduced between the outer faces of the fitting portions and the inner faces of the through-holes. The heat-welding tape is made up of an insulating substrate with heat-welding layers layered on both sides thereof.

Abstract: A stack type battery has a plurality of positive electrode plates (1), a plurality of negative electrode plates (2), and a separator (3) interposed therebetween. The positive electrode plates (1) and the negative electrode plates (2) are alternately stacked one on the other. The separator (3) has a heat-resistant layer (3R) having heat resistance and heat-melting layers (3M), each of the heat-melting layers (3M) having a shutdown function and a melting point lower than the melting point of the heat-resistant layer (3R) and disposed over the entire surface of each of both sides of the heat-resistant layer (3R). The heat-melting layers (3M) of the separator (3) are fixed to each other by thermal welding.

Abstract: In a stack type battery, stacked positive and negative electrode lead tabs (11, 12) are joined to one another at a location between the current collector terminals and the electrode plates, the positive and negative electrode lead tabs (11, 12) being folded at an intermediate location between positive and negative electrode current collector terminals (15, 16) and positive and negative electrode plates and protruding from the positive and negative electrode plates. A stacked electrode assembly (10) is accommodated in a battery case (18) having flexibility. A first spacer (a first cover portion (52) of an integral-type spacer (5)) is disposed between the battery case (18) and an open side end of the positive and negative electrode lead tabs (11, 12) formed by folding the positive and negative electrode lead tabs (11, 12).

Abstract: A power generation cassette type power plant for marine electric propulsion includes a multiplicity of power generation units each being formed as a power generation cassette including a power generator, a prime mover, for example an internal combustion engine for driving the power generator and a support structure for supporting the power generator and the engine internally. The support structure is formed in the same shape as that of a container for transporting cargo. When the power generators of the multiplicity of power generation units are operated in parallel to each other to supply electric power to a load, controllers serve to share the load to the generators properly.