Nissan Motor Company Limited

Automotive Energy Supply Corporation

Ryuuta Yamaguchi

Takashi Honda

Osamu Shimamura

Takeshi Miyamoto

Kenzo Oshihara

Ikuma Matsuzaki

Kousuke Hagiyama

Keisuke Matsumoto

Hiroshi Ogawa

Yasuhiko Kitajima

Kantaro Yoshimoto

Kazuki Miyatake

Yasuaki Hayami

Fumihiro Kawamura

Kosuke Hagiyama

Masanori Yamagiwa

Yutaka Tajima

Kuniharu Nomoto

Sayaka Yonehara

Norikazu Mineo

The present invention provides a non-aqueous electrolyte secondary battery with various improved battery characteristics and a method for manufacturing such a non-aqueous electrolyte secondary battery. In the present invention, the battery manufacturing method includes accommodating and sealing a flat battery element () in which a positive electrode plate () and a negative electrode plate () stacked together via a separator (), together with a non-aqueous electrolyte including a surplus electrolyte and at least one kind of electrolyte additive, in a laminate film exterior member (), and then, subjecting the thus-assembled battery () to charging operation including at least initial charging in a state where a pressure is applied to a flat surface of the battery element from the outside of the exterior member ().

Nonaqueous electrolyte secondary battery and method for manufacturing same

A non-aqueous electrolyte secondary battery can efficiently discharge the gas generated to the outside of the electrode and exhibits a low decrease in battery capacity even when used for a long period of time in the case of using an aqueous binder as the binder of a negative electrode active material. The non-aqueous electrolyte secondary battery has a positive electrode active material layer is formed on a surface of a positive electrode current collector, a negative electrode active material layer is formed on a surface of a negative electrode current collector, and a separator, wherein the density of the negative electrode active material layer is from 1.3 to 1.6 g/cm, the negative electrode active material layer contains an aqueous binder, and the surface center line average roughness (Ra) of a surface on a separator side of the negative electrode active material layer is from 0.5 to 1.0 &#x3bc;m.

Non-aqueous electrolyte secondary battery

Wettability of positive and negative electrode active material layers is improved by having the ratio of the liquid absorption speed of an electrolyte to the positive and negative electrode active material layers in an appropriate range when an aqueous binder is used in the negative electrode active material layer. The non-aqueous electrolyte secondary battery has a power generating element having a positive electrode active material layer on a surface of a positive electrode current collector, a negative electrode active material layer containing an aqueous binder on a surface of a negative electrode current collector, and a separator, and Tc/Ta is in the range of 0.6 to 1.3 when Tc is the soak-in time of the electrolyte liquid into the positive electrode active material layer and Ta is the soak-in time of the electrolyte liquid into the negative electrode active material layer.

A fluid reforming apparatus of the present invention includes: a flow channel () in which a catalyst () is fixed to an inner wall; a fluid heating device () which heats a fluid to be reformed by the catalyst () and/or heats the catalyst () in the flow channel (); catalyst temperature measuring devices () which measure temperatures of the catalyst (); and a pressure control device () which controls a pressure of the fluid in the flow channel so that the fluid can have a target pressure. The pressure control device () increases the target pressure when a difference between the temperatures of the catalyst () in a flow direction of the fluid exceeds a predetermined value during a period while the fluid in the flow channel () is being heated up to a target temperature.

Fluid reforming apparatus for maintaining thermal conductivity of a fluid in a flow channel

A fluid heating apparatus heats fluid in a passage to a target temperature. The fluid heating apparatus includes a fluid heating unit that heats the fluid, a fluid temperature measuring unit that measures a temperature of the fluid, and a pressure control unit that controls a pressure in the passage such that the pressure becomes equal to a target pressure. While the fluid in the passage is heated to the target temperature and when a temperature estimated from the thermal conductivity and specific heat is not increased, the pressure control unit increases the target pressure. According to a fluid heating method, when the fluid is heated by the fluid heating apparatus, the pressure control unit controls the pressure of the fluid such that the pressure becomes equal to or higher than a critical pressure.

Fluid heating apparatus

A power conversion system for converting a dc voltage to a pulsed ac voltage includes a dc voltage source providing three or more electric potentials, and a switching circuit arranged to connect one of the potentials selectively to an output terminal. A controller produces a pulsed ac output voltage at the output terminal from the potentials of the dc voltage source by controlling an on time for connecting each of the potentials to the output terminal.

Power conversion and vehicle

Growing community of inventors

Yokohama, Japan

Ryuuta Yamaguchi