Nissan Motor Company Limited

Tomoya Kubota

Satoru Ichikawa

Kenji Ohara

Yoshiaki Nitta

Yukinari Kato

Hideaki Horie

Yoshio Shimoida

Takaaki Abe

Kenji Hosaka

Takashi Honda

Shigeo Ibuka

Gentaro Kano

Masanori Aoyagi

Hiroshi Miyakubo

Manabu Kaseda

Yasuyuki Tanaka

Sohei Suga

Yasuhito Miyazaki

Chizuru Matsuyama

Kosuke Hagiyama

Kazuyuki Sakamoto

Haruyuki Saito

Yasuo Ohta

Keisuke Shimamoto

Kana Sato

A current collector for a secondary battery () of the present invention includes a resin layer () having electrical conductivity, and an ion barrier layer () provided on the surface of the resin layer (). The ion barrier layer () contains ion trapping particles () in which metal compounds () are provided on the surfaces of metal containing particles (). The ion trapping particles () are continuously provided from an interface () between the resin layer () and the ion barrier layer () toward a surface () of the ion barrier layer (). Thus, the ion barrier layer () prevents from the entry of ions, so that the ion adsorption in the current collector () can be decreased.

Current collector for secondary battery and secondary battery using the same

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

A negative electrode for a secondary battery according to the present invention has a collector and a negative electrode active material layer formed on a surface of the collector and containing negative electrode active material particles. In the negative electrode active material layer, an insulating material is arranged between the negative electrode active material particles so as not to develop conductivity by a percolation path throughout the negative electrode active material layer. It is possible in this configuration to effectively prevent the occurrence of a short-circuit current due to an internal short circuit and the generation of heat due to such short-circuit current flow in the secondary battery while securing the battery performance of the secondary battery.

Negative electrode for secondary battery, and process for production thereof

In a device for controlling an assembled battery provided with a plurality of single batteries, the device includes a capacity adjustment section for adjusting a capacity such that voltages of the single batteries are equalized at a targeted voltage, an internal state detection section for detecting terminal voltages or SOC of the single batteries and for detecting, based on the detected terminal voltages/SOC, a voltage/SOC difference among the single batteries as voltage-difference/SOC-difference data, and a time-series data storage for storing the voltage-difference/SOC-difference data in time-series. Also provided is a prediction section for more appropriately predicting time when the assembled battery becomes an abnormal state, based on a time-dependent change in the voltage-difference/SOC-difference data detected in a voltage/SOC region different from the targeted voltage by a predetermined voltage, among the stored time-series voltage-difference/SOC-difference data.

Device for controlling assembled battery

Growing community of inventors

Yokohama, Japan

Tomoya Kubota