A nonaqueous electrolyte battery includes a negative electrode and a positive electrode. The negative electrode includes a negative electrode current collector and a negative electrode active material having a lithium ion absorption potential of 0.4 V (vs. Li/Li+) or more. The negative electrode current collector is made of aluminum or an aluminum alloy. The positive electrode includes a positive electrode current collector and a positive electrode active material. The positive electrode current collector has a total area and specific capacitance larger than those of the negative electrode current collector, and is made of aluminum or an aluminum alloy.

Nonaqueous electrolyte battery, battery pack and vehicle

A high capacity lithium secondary battery with excellent safety is provided by suppressing expansion of a negative electrode active material during charge and increasing the content of a heat-resistant resin in a separator relative to conventional one. The lithium secondary battery includes: a negative electrode active material that comprises compound particles containing at least one metal element selected from the group consisting of Si, Sn, Al, and Zn; and a separator that has a first porous layer comprising polyolefin and a second porous layer comprising a heat-resistant resin. The separator contains 10 to 60 parts by weight of the second porous layer per 100 parts by weight of the first porous layer.

Lithium Secondary Battery

Disclosed is a positive active material for a rechargeable lithium battery. The positive active material includes a core and a surface-treatment layer on the core. The core includes at least one lithiated compound and the surface-treatment layer includes at least one coating material selected from the group consisting of coating element included-hydroxides, oxyhydroxides, oxycarbonates, hydroxycarbonates and any mixture thereof.

Positive active material for rechargeable lithium battery and method of preparing same

PROBLEM TO BE SOLVED: To drastically improve safety by providing a porous high molecular electrolyte having a shutting down function at a part of the surface for the active material of at least one of either a positive and a negative electrodes SOLUTION: The part of a surface of the cobalt acid lithium as the positive electrode active material and a low-crystallization amorphous mesocarbon micro beads(MCMB) as the negative electrode active material is coated with the porous high molecular electrolyte Consequently, before the temperature rises to a temperature which generates shutting down effect of a polyethylene separator, a shutting down function for the porous high molecular electrolyte of PVdF operates at 100-110 degC When the surface of the active material is completely coated with the porous high molecular electrolyte, electrical conductivity between the active material grains is eliminated, and the active material grains are electrically separated and do not take part in reaction Shutting down function effectively works with the existence of the porous high molecular electrolyte at a part of the surface of the active material

Nonaqueous electrolyte secondary battery

A subject for the invention is to improve the cycle characteristics of a high-capacity secondary battery containing an active material packed at a high density, by using a particulate active material having a low aspect ratio. The invention relates to a nonaqueous-electrolyte secondary battery comprising a negative electrode and a positive electrode each capable of occluding/releasing lithium, a separator, and a nonaqueous electrolyte solution comprising a nonaqueous solvent and a lithium salt, characterized in that the separator comprises a porous film made of a thermoplastic resin containing an inorganic filler, and at least either of the following is satisfied: the active material contained in the negative electrode is a particulate active material having an aspect ratio of from 1.02 to 3; and the active material contained in the positive electrode is a particulate active material having an aspect ratio of from 1.02 to 2.2.

PROBLEM TO BE SOLVED: To obtain an enough charge-discharge cycle property with charge-discharge efficiency improved by restraining degradation of a negative electrode active material separated in a columnar shape and generated on a surface of a negative electrode collector by charging and discharging in a lithium secondary cell equipped with a positive electrode, a negative electrode using an alloying material with lithium for a negative electrode active material and a nonaqueous electrolyte using a nonaqueous electrolytic solution with a solute dissolved in a nonaqueous solvent. SOLUTION: The lithium secondary cell is equipped with a positive electrode 12, a negative electrode 13 using an alloying material with lithium for a negative electrode active material and a nonaqueous electrolyte using a nonaqueous electrolytic solution with a solute dissolved in a nonaqueous solvent. A negative electrode provided with a thin layer of the above negative electrode active material on a surface of the negative electrode collector 13a is used, and also, a heterocyclic compound including S and/or O in its ring is added to the above nonaqueous electrolytic solution. COPYRIGHT: (C)2004,JPO

Lithium secondary cell

PROBLEM TO BE SOLVED: To provide a sealed battery in which a welding between a current collector and an external terminal fixed on a core body of an electrode body can easily be performed by a high energy beam, such as laser or the like and provide its manufacturing method. SOLUTION: In a terminal of the sealed battery, a terminal portion 19 3 at one end side of a flange portion 19 1 and a caulking member 19 2 of a cylindrical shape at the other end side are formed respectively, and the cylindrical caulking member19 2 is inserted into an open mouth portion which is formed in a first insulation member 21 1 , a sealing plate 13, a second insulation member 21 2 and a current collector 18 1 respectively, and the cylindrical caulking member 19 2 is caulked in a diameter-expansion direction to fix mechanically the flange portion 19 1 of the external terminal, the sealing plate 13 and the current collector 18 1 , and a thickness-reduced portion 19 4 formed on a top end portion of the cylindrical caulking portion 19 2 is attached tight with the current collector 18 1 , and moreover, the thickness-reduced portion 19 4 and the current collector 18 1 is welded by a high energy beam. COPYRIGHT: (C)2009,JPO&INPIT

Sealed battery and its manufacturing method

PROBLEM TO BE SOLVED: To provide a manufacturing method of a positive electrode active material capable of obtaining a high-capacity and high-voltage lithium secondary battery SOLUTION: A mixture of first oxide powder expressed by the composition formula LiANiPCoQMnRO2 , (where 09<=A<=11, 05<P<=10, 0<=Q<05 0<=R<=03, P+Q+R=1), and second oxide powder expressed by the composition formula LiBNiSCoTMnUO2 , (where 09<=B<=11, 0<=S<05, 05<T<=10, 0<=U<=03, S+T+U=1), is baked to manufacture a sintered body The sintered body is pulverized to manufacture a positive electrode active material constituted of first active material powder and second active material powder stuck with a third oxide expressed by the composition formula LiCNiXCoYMnZO2 , (where 09<=C<=11, S<X<P, Q<Y<T, 0<=Z<=03, X+Y+Z=1), to the grain surfaces of the first oxide powder and the second oxide powder

Manufacture of positive electrode active material for lithium secondary battery

PROBLEM TO BE SOLVED: To provide an optimum system which can reduce peak power demand, using a small storage battery. SOLUTION: A solar power generation system, which is linked to a power system, supplies the power generated at a solar cell device to an inverter device for conversion to alternating current, and feeds it to a power consumption part, comprises a storage battery to charge power from the solar cell device, and a changeover control means to output the power from the solar cell device to the storage battery or to the inverter device upon changing over; and supplies the power to the inverter device in addition to generated energy from the solar cell device, by controlling to charge the storage battery with one or more of power selected from the generated power by the solar cell device during off-peak time of power demand after sun rising or power from the power system during night time, and by controlling discharge of energy stored in the storage battery corresponding to a fluctuation curve of the power demand in a particular time zone the power demand is high.

Solar power generation system having storage battery

PROBLEM TO BE SOLVED: To obtain a high current collecting performance in a nonaqueous electrolyte secondary battery, in which a take-up electrode 7 is housed in a can 1. SOLUTION: In this nonaqueous electrolyte secondary battery, an edge 78 of a band-shaped core configuring an electrode protrudes at the end of a take-up electrode 7, and a collecting plate 8 is connected to the edge 78. On the collecting plate 8, plural convex parts 82, whose cross section projects in hyperbolic or trapezoidal shapes, are formed opposite to the core edge 78, and the collecting plate 8 is coupled to one electrode terminal 1 in conjunction with being welded to the core edge 78, in a condition where each convex 82 bites into the core edge 78.

俊之能間

Papers

Lithium secondary cell

Sealed battery and its manufacturing method

Manufacture of positive electrode active material for lithium secondary battery

Solar power generation system having storage battery

Nonaqueous electrolyte secondary battery and manufacturing method therefor

俊之 能間

Papers

Lithium secondary cell

Sealed battery and its manufacturing method

Manufacture of positive electrode active material for lithium secondary battery

Solar power generation system having storage battery

Nonaqueous electrolyte secondary battery and manufacturing method therefor

俊之能間