Sony Corporation

Murata Manufacturing Co., Ltd.

Shoichi Nishiyama

Masaru Hiratsuka

Takehiko Tanaka

Hiroyuki Suzuki

Hiroshi Inoue

Masaki Kuratsuka

Ryuji Soeda

Takashige Fujikawa

Takamasa Ono

Atsushi Ouki

Sho Takahashi

Masumi Fukuda

Hidetoshi Takahashi

Yosuke Kono

Shinji Hayazaki

Kazutaka Mita

Takeo Asanuma

Atsushi Nemoto

Yoshihito Akiyama

A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a positive electrode active material layer. The positive electrode active material layer includes a lithium-nickel composite oxide of a layered rock-salt type.

Positive electrode for secondary battery, and secondary battery

Provided is a battery in which a positive electrode and a negative electrode, to which electrode composite materials are seamlessly applied, are wound and accommodated in an exterior member, the battery having a part where foil exposed surfaces of the positive electrode and the negative electrode face each other with an insulator therebetween, the foil exposed surfaces being formed at one-side application parts on an outer side of the winding of the respective electrodes.

Battery, battery pack, electronic device, electric vehicle, electricity storage device, and power system

A battery pack includes one or more cell blocks in which one or more secondary battery cells are connected in series and/or in parallel, and a control section for measuring a voltage of the one or more cell blocks to detect an abnormality of a cell block on the basis of a measurement result. The control section calculates a time differential of the voltage for the one or more cell blocks on the basis of the measured voltage, extracts a first time differential which is maximum and a second time differential which is minimum from the time differentials of the voltage for the one or more cell blocks, and determines that a cell block corresponding to the second time differential is abnormal in a case where a difference between the first time differential and the second time differential is less than a prescribed value.

Battery pack and control method therefor

A battery includes a spirally wound electrode body in which a cathode and an anode are layered with a separator in between and spirally wound. The spirally wound electrode body is attached with at least one lead on the spirally-winding center side. The cathode has a cathode current collector having a pair of opposed faces, an outer-face cathode active material layer provided on the spirally-winding outer face side of the cathode current collector, and an inner-face cathode active material layer provided on the spirally-winding inner face side thereof. A thickness of the inner-face cathode active material layer is smaller than a thickness of the outer-face cathode active material layer. An outer face active material region provided with only the outer-face cathode active material layer is formed to be overlapped with the lead on the spirally-winding center side of the cathode.

Spirally wound battery

Growing community of inventors

Fukushima, Japan

Shoichi Nishiyama