摘要:
A battery control system includes a lithium ion secondary battery and a control device and further includes a voltage storage unit, a resistance storage unit, a current storage unit, a difference obtaining unit for obtaining a difference resistance ΔR(Tja) between a normal internal resistance Rj(Tja) at a predetermined battery temperature Tja in a normal temperature range ATj and an initial internal resistance R0(Tja) at the predetermined battery temperature, and a maximum voltage calculation unit for giving a maximum inter-terminal voltage Vm(T), when at least a battery temperature T is within a low-temperature range ATl, as a value obtained by adding a product of the difference resistance ΔR(Tja) and the allowable charging current Im(T) to the initial maximum inter-terminal voltage Vm0(T).
摘要:
The non-aqueous electrolyte secondary battery 10 provided by the present invention comprises a positive electrode 30, a negative electrode 50 and a non-aqueous electrolyte. The negative electrode 50 includes a negative electrode current collector 52 and a negative electrode active material layer 54 formed on the current collector 52, the negative electrode active material layer 54 containing a negative electrode active material 55 capable of storing and releasing charge carriers and having shape anisotropy so that the charge carriers are stored and released along a predefined direction. The negative electrode active material layer 54 includes, at a bottom thereof contacting the current collector 52, a minute conductive material 57 with granular shape and/or minute conductive material 57 with fibrous shape having an average particle diameter that is smaller than that of the negative electrode active material 55, and includes, at the bottom thereof; a part of the negative electrode active material 55. At least 50% by number of the total amount of the negative electrode active material 55 is oriented so that the direction of storage and release of the charge carriers is at an angle of 45° or more and 90° or less relative to the surface of the current collector 52.
摘要:
There is provided a lithium ion secondary cell excellent in charging and discharging cycle characteristics. A lithium ion secondary cell includes: an electrode body including a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, and a separator; and a non-aqueous electrolyte containing a lithium salt as a supporting salt in an organic solvent, the electrode body and the non-aqueous electrolyte being accommodated in a case. The positive electrode active material is a lithium transition metal oxide having a layered structure. The electrolyte contains a compound represented by a chemical formula (I) in an amount of β mol relative to the total content α mol of moisture to be mixed in the cell. β satisfies −1.3≦log(β/α)≦1.
摘要:
A nonaqueous electrolyte secondary battery includes a positive electrode (5), a negative electrode (6) and a porous insulation layer (7). The positive electrode (5) includes a positive electrode current collector (51) and a positive electrode mixture layer (52), and the negative electrode (6) includes a negative electrode current collector (61) and a negative electrode active material layer (62). After charging the nonaqueous electrolyte secondary battery, when a surface of the positive electrode mixture layer (52) and a surface of the negative electrode active material layer (62) are brought in contact with each other, terminals are provided, respectively, on the positive electrode current collector (51) and the negative electrode current collector (62) and a resistance value between the terminals is measured, the resistance value is 1.6 Ω·cm2 or more.
摘要:
A battery control system includes a lithium ion secondary battery and a control device and further includes a voltage storage unit, a resistance storage unit, a current storage unit, a difference obtaining unit for obtaining a difference resistance ΔR(Tja) between a normal internal resistance Rj(Tja) at a predetermined battery temperature Tja in a normal temperature range ATj and an initial internal resistance R0(Tja) at the predetermined battery temperature, and a maximum voltage calculation unit for giving a maximum inter-terminal voltage Vm(T), when at least a battery temperature T is within a low-temperature range ATl, as a value obtained by adding a product of the difference resistance ΔR(Tja) and the allowable charging current Im(T) to the initial maximum inter-terminal voltage Vm0(T).
摘要:
A process of manufacturing segments, an anisotropic direction of which is continuously changed in a plane vertically by a uniform magnetic field maintained in a constant direction and a process of arranging a plurality of segments on a circumference, extruding the segments in a ring shape by rheology based on the viscous deformation of the segments, from one thrust-direction end surface of the segments, and subsequently compressing the segments from both thrust-direction end surfaces of the segments are necessarily included. A ring magnet, anisotropy of which is controlled in a continuous direction, is provided, and a source for generating a static magnetic field has energy density (BH) max≧160 to 180 kJ/m3.
摘要:
A secondary battery includes an electrode group 4 in which a positive electrode plate 1 and a negative electrode plate 2 are wounded with a porous insulation layer interposed therebetween, wherein an electrode plate end portion 1a protrudes from the porous insulation layer and abuts the current collector plate 5, and the current collector plate 5 is placed in relation to the electrode group 4 so as to entirely cover the end portion 1a of the electrode group 4. Parts of the electrode plate end portion 1a abutting the current collector plate 5 are welded to the current collector plate 5 at discrete joint portions 6 on the current collector plate 5, and the joint portions 6 are discretely provided on a surface of the current collector plate 5 so that a current flowing from the electrode plate 1 to the current collector plate 5 is uniformly distributed.
摘要:
A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a non-aqueous electrolyte, and an insulating layer formed on a surface of the positive electrode. The positive electrode includes a lithium nickel composite oxide having a layer structure, and the lithium nickel composite oxide is represented by the general formula: LixNiyM1-yO2 where M is at least one selected from the group consisting of Na, Mg, Sc, Y, Mn, Fe, Co, Cu, Zn, Al, Cr, Pb, Sb, and B, 0
摘要:
A nonaqueous electrolyte secondary battery includes: a positive electrode 4; a negative electrode 6; a separator 5; and a battery case 1 in which an electrode plate group 7 including the positive electrode 4 and the negative electrode 6 spirally wound or stacked with the separator 5 interposed therebetween is stored with an electrolyte. In the nonaqueous electrolyte secondary battery, after charging, when the separator 5 is removed to bring a surface of the positive electrode mixture layer and a surface of the negative electrode mixture layer in contact with each other, terminals are respectively provided on the positive electrode current collector and the negative electrode current collector and a resistance value between the terminals is measured, the resistance value is 1.6 Ω·cm2 or more, and the battery case 1 is electrically insulated from the positive electrode 4 and the negative electrode 6.
摘要:
In a radial-direction gap type magnet motor, when an energy density increases, a direction change Mθ/φp of a static magnetic field with respect to a mechanic angle between different poles increases in an exponential manner and thus to decrease a cogging torque of the motor is not compatible to increase a torque density. In order to solve the problem, assuming that φt denotes a mechanic angle of a stator iron core teeth, φp denotes a mechanical angle of a magnetic pole, and Mθ denotes an angle of a static magnetic field with respect to a circumferential tangential line of a radial magnetic pole center, a radial-direction type magnet motor in which φt