Nissan Motor Company Limited

Envision Aesc Japan Ltd.

Automotive Energy Supply Corporation

Masanori Aoyagi

Kenji Ohara

Sohei Suga

Junko Nishiyama

Koichi Shinohara

Toshihiro Horiuchi

Hideaki Horie

Yoshiaki Nitta

Fumihiro Kawamura

Masanobu Sato

Yoshio Shimoida

Kenji Hosaka

Kouichi Shimizu

Kousuke Hagiyama

Tatsuya Kamata

Hideyuki Saeki

Yasuo Ohta

Osamu Shimamura

Yuki Kusachi

Gentaro Kano

Kazuki Miyatake

Motoharu Obika

Norihisa Waki

Yosuke Suzuki

Manabu Kaseda

Tamaki Hirai

Shin Tanaka

Hideki Kawashima

Tamaki Miura

Tomoya Kubota

Hideaki Ohtsuka

Takayuki Matsuoka

Junji Katamura

Shigeo Watanabe

Shinsaku Ehara

Provided is a hybrid electric vehicle in which, in accordance with the system side of the vehicle including a fuel economy-emphasized system, a wide use-range of the SOC of a lithium ion secondary battery cell can be utilized.

Hybrid electric vehicle, and lithium ion secondary battery cell selection method for hybrid electric vehicle

A lithium ion secondary battery includes: a negative electrode having a carbon-based negative electrode material containing graphite particles and amorphous carbon particles; and a positive electrode including a lithium composite oxide. The lithium composite oxide is represented by a general formula: LiNiMnCoO, where x is a numeral of 1 or more and 1.2 or less, and y and z are positive numerals satisfying the relation of y+z&#x3c;1. The lithium composite oxide has a layer crystal structure and has a median particle diameter (D50) of 4.0 &#x3bc;m or more and less than 6.0 &#x3bc;m.

Lithium ion secondary battery

Provided is a lithium ion secondary battery including a power generating element that includes at least one positive electrode plate, at least one negative electrode plate, and at least one separator. A ratio B/A (m&#x3a9;cm) of volume resistivity B (m&#x3a9;cm) of the power generating element to an area A (cm) per one positive electrode plate is 0.4 or more and less than 0.9.

A method for producing a non-aqueous electrolyte secondary battery including an electrolyte containing an electrolyte salt, a non-aqueous solvent capable of dissolving the electrolyte salt, and plural additives, wherein at least one of the additives has a reduction potential that is nobler than the reduction potential of the non-aqueous solvent. The method includes a first charging step for maintaining battery voltage at a negative electrode potential at which the additive having the noblest reduction potential of the additives is decomposed while the non-aqueous solvent and other additives are not reduced and decomposed and a second charging step for maintaining battery voltage so as to have reduction and decomposition of at least one of the non-aqueous solvents and bring the electrical potential of the negative electrode to at least 0.7 V relative to lithium. By having a uniform reaction in an electrode, a decrease in durability is suppressed.

Method for producing non-aqueous electrolyte secondary battery

A bipolar electrode is composed of a first active material layer which is, for example, a positive electrode active material layer formed to include a first active material on one side of a collector, and a second active material layer which is, for example, a negative electrode active material layer formed to include a second active material with less compressive strength than that of the first active material on the other side of the collector. Then, a density adjusting additive which is an additive material with larger compressive strength than that of the second active material is included in the second active material layer.

Bipolar electrode, bipolar secondary battery using the same and method for manufacturing bipolar electrode

A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode having a negative electrode active material, and a separator containing an electrolyte. The electrolyte includes an electrolyte salt, a nonaqueous solvent into which the electrolyte salt can be dissolved, a first additive selected from predetermined oxalate compounds and disulfonic acid ester compounds, and a second additive that has a reduction potential less than the reduction potential of the first additive. The second additive is selected from a group having vinylene carbonate, fluoroethylene carbonate, vinyl ethylene carbonate, 1, 3-propane sultone, 1, 4-butane sultone, 1, 3-propene sultone, succinonitrile, and adiponitrile.

Nonaqueous electrolyte secondary battery

A negative electrode material for a lithium ion battery according to an embodiment of the present disclosure includes graphite particles and amorphous carbon particles. The graphite particles have a median diameter (D50) A of 8.0 &#x3bc;m or more and 11.0 &#x3bc;m or less. A ratio A/B of the median diameter A (&#x3bc;m) to a median diameter (D50) B (&#x3bc;m) of the amorphous carbon particles satisfies a relation of 1.1&#x3c;(A/B)&#x2264;2.75.

Negative electrode material for lithium ion battery

A non-aqueous electrolyte secondary battery has the internal resistance of 10 m&#x3a9;/Ah or less (SOC of 50%) and has a power generating element containing the following: a positive electrode obtained by forming, on the surface of a positive electrode current collector, a positive electrode active substance layer containing a positive electrode active substance; a negative electrode obtained by forming, on the surface of a negative electrode current collector, a negative electrode active substance layer containing a negative electrode active substance; and a separator. The positive electrode active substance is made to contain a spinel type lithium manganese composite oxide and a lithium nickel-based composite oxide, and the mixing ratio of the lithium nickel-based composite oxide is 50 to 70% by weight relative to the total 100% by weight of the spinel type lithium manganese composite oxide and the lithium nickel-based composite oxide.

Non-aqueous electrolyte secondary battery

Provided is a lithium ion secondary battery including a power generation element, the power generation element including a positive electrode, a negative electrode, a separator, and an electrolyte solution, the positive electrode including a positive electrode current collector, and a positive electrode active material layer provided for the positive electrode current collector, the positive electrode active material layer including a positive electrode active material and binder, the negative electrode including a negative electrode current collector and a negative electrode active material layer provided for the negative electrode current collector, the negative electrode active material layer including a negative electrode active material and binder. The positive electrode has a volume resistivity in a range of 100 &#x3a9;cm or more and 700 &#x3a9;cm or less after at least one charging and discharging cycle.

A bipolar electrode includes a collector; a positive electrode active material layer disposed on one surface of the collector; and a negative electrode active material layer disposed on the other surface of the collector. The quotient of the volume resistance of the collector and that of the positive and negative electrode active material layers is between 10and 10. The bipolar electrode further includes a current distribution relaxation layer having a volume resistivity lower than that of either the positive electrode active material layer or the negative electrode active material layer. At least one active material layer having a volume resistivity larger than that of the current distribution relaxation layer is disposed between the current distribution relaxation layer and the collector.

Bipolar electrode and bipolar lithium-ion secondary battery using same

[Object] Provided is a means which is capable, with respect to a non-aqueous electrolyte secondary battery, of suppressing a decrease in capacity when the battery is used for a long period of time, and improving cycle characteristics. [Solving Means] Provided is a positive electrode active substance for a non-aqueous electrolyte secondary battery, the positive electrode active substance being a lithium-nickel-manganese-cobalt composite oxide and having true density of 4.40 to 4.80 g/cm.

Positive electrode active substance, positive electrode material, positive electrode, and non-aqueous electrolyte secondary battery

A control device of a secondary battery has a current detection unit () that detects a charge current to the secondary battery () and a discharge current from the secondary battery (); a calculation unit () that calculates, from the charge current and the discharge current, a charge-discharge efficiency and a discharge-charge efficiency when performing a charge operation and a discharge operation; a deterioration judgment unit () that judges a deterioration state of the secondary battery () from a temporal change rate of the charge-discharge efficiency and a temporal change rate of the discharge-charge efficiency; and a control unit () that sets a charge termination voltage of the secondary battery () in accordance with the deterioration state.

Secondary battery control device

A bipolar secondary battery is provided with an electric power generating unit, a pair of terminal plates. The electric power generating unit includes a plurality of bipolar electrodes stacked on one another with an electrolyte layer disposed between the bipolar electrodes and separating the bipolar electrodes. Each of the bipolar electrodes includes a collector with a positive electrode active material layer formed on a first side surface of the collector, and a negative electrode active material layer formed on a second side surface of the collector. The first terminal plate is connected to a first stacking direction facing end of the electric power generating unit. The second terminal plate is connected to a second stacking direction facing end of the electric power generating unit. At least one of the terminal plates includes an electric current suppressing device that suppresses an electric current occurring when an internal short circuit occurs in the electric power generating unit.

Bipolar second battery with terminal plate including current suppressing device, battery pack and vehicle equipped with the same

A bipolar secondary battery includes a plurality of bipolar electrodes, each including a current collector that has a positive electrode layer on one surface thereof and a negative electrode layer on the opposite surface thereof. A separator is disposed between adjacent two bipolar electrodes such that the positive electrode layer of one bipolar electrode and the negative electrode layer of the adjacent bipolar electrode adjacent are opposed to each other along the length of the separator. The positive electrode layer and the negative electrode layer are formed with protrudent portions disposed at positions offset from each other along a length of the current collector.

Bipolar secondary battery, method for manufacturing the bipolar secondary battery, bipolar electrode, method for manufacturing the bipolar electrode and assembled battery

A vehicle drive force control apparatus is provided that can stabilize the output of the electric motor even if the engine rotational speed experiences an acute change. The output of an engine is delivered to the left and right front wheels through a transmission and also to an electric generator. The output voltage of the electric generator is supplied to an electric motor and the output of the electric motor drives the left and right rear wheels. The drive force control device predicts if the rotational speed of the engine will decrease or increase acutely based on the upshifting and downshifting of the transmission and adjusts the field current of the electric generator up or down before the acute change in the engine rotational speed occurs.

Growing community of inventors

Yokohama, Japan

Masanori Aoyagi