Murata Manufacturing Co., Ltd.

Sumitomo Heavy Industries, Ltd.

Sony Corporation

Murata Manufacturingco., Ltd.

Takaaki Matsui

Taichi Kogure

Kazuki Honda

Yuta Hirano

Naoko Yamakawa

Tadashi Matsushita

Keitaro Kitada

Futoshi Sato

Hideki Nakai

Moriaki Okuno

Shinji Hatake

Rikako Imoto

Yoshifumi Shimizu

Masumi Fukuda

Takashi Kokubun

Aya Mashiko

Swati Devi

Takashi Sato

Masayuki Iwama

Kakeru Takahashi

Taichi Katsumoto

Masahiro Miyamoto

Masaki Kuratsuka

Asuki Yanagihara

Shinichi Katayama

Koji Shibutani

Mitsuhiro Ue

Tomoyo Ooyama

Takuma Kawahara

Yoshihiro Dokko

Hiroto Asano

Yoshimi Tokuhara

Aya Hashimoto

Kyohei Ogawa

Seiji Onoe

Miki Miyazaki

Ami Onuma

Yoshikazu Kato

Takayuki Yokodo

A secondary battery includes: a positive electrode; a negative electrode including a negative electrode active material layer on which a film including an organic substance is formed; and an electrolytic solution including a sulfur-containing cyclic compound, a fluorinated cyclic carbonic acid ester, an unsaturated cyclic carbonic acid ester, and a multi-nitrile chain compound. According to a mass analysis of the electrolytic solution using gas chromatography-mass spectrometry, a content of the sulfur-containing cyclic compound, a content of the fluorinated cyclic carbonic acid ester, a content of the unsaturated cyclic carbonic acid ester, and a content of the multi-nitrile chain compound in the electrolytic solution each satisfy the following relation: the content of the multi-nitrile chain compound>the content of the fluorinated cyclic carbonic acid ester>the content of the sulfur-containing cyclic compound>the content of the unsaturated cyclic carbonic acid ester, and the total sum of those contents is greater than or equal to 5.0 wt % and less than or equal to 11.0 wt %.

Secondary battery

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 N-methyl-2-pyrrolidone. Where the positive electrode active material layer is divided equally in a width direction into two end regions and two middle regions located between the two end regions, a ratio of a content of N-methyl-2-pyrrolidone in the two middle regions to a content of N-methyl-2-pyrrolidone in the two end regions is greater than or equal to 4 and less than or equal to 8.

Positive electrode for secondary battery, and secondary battery

A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a positive electrode active material layer including a lithium-cobalt composite oxide. The lithium-cobalt composite oxide has a layered rock-salt crystal structure. The negative electrode includes a negative electrode active material layer including graphite. When the secondary battery is charged and discharged with an upper limit of a closed circuit voltage being set to 4.42 V or higher, a unit capacity (mAh/g) satisfies a condition represented by 168 mAh/g≤unit capacity (mAh/g)≤(−0.28×area rate (%)+178) mAh/g.

A secondary battery includes a wound electrode body. The wound electrode body includes a positive electrode, a negative electrode, and a separator. The positive electrode and the negative electrode are stacked on each other with the separator interposed therebetween and are wound about a winding axis. The wound electrode body has a section perpendicular to the winding axis. The section has an elongated shape that includes a flat part and a pair of curved parts. The curved parts oppose each other with the flat part interposed therebetween. The negative electrode includes a negative electrode current collector and a negative electrode active material layer provided on the negative electrode current collector. A width of the wound electrode body, a wound-layer number of the wound electrode body, and a ratio of a second distance to a first distance satisfy at least one of Condition A and Condition B.

Secondary battery, battery pack, electric vehicle, electric power storage system, electric power tool, and electronic apparatus

A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a lithium-cobalt composite oxide having a layered rock-salt crystal structure. The negative electrode includes graphite. An open circuit potential of the negative electrode measured in a full charge state is from 19 mV to 86 mV. A potential variation of the negative electrode is greater than or equal to 1 mV when the secondary battery is discharged from the full charge state by a capacity corresponding to 1% of a maximum discharge capacity. The maximum discharge capacity is obtained when the secondary battery is discharged with a constant current from the full charge state until the closed circuit voltage reaches 3.00 V, following which the secondary battery is discharged with a constant voltage of the closed circuit voltage of 3.00 V for 24 hours.

A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a lithium-cobalt composite oxide having a layered rock-salt crystal structure. The negative electrode includes graphite. A potential variation of the positive electrode is greater than or equal to 2 mV when the secondary battery is discharged from a full charge state by a capacity corresponding to 1% of a maximum discharge capacity. The maximum discharge capacity is a discharge capacity obtained when the secondary battery is discharged with a constant current from the full charge state until the closed circuit voltage reaches 3.00 V, following which the secondary battery is discharged with a constant voltage of the closed circuit voltage of 3.00 V for 24 hours.

A secondary battery includes a wound electrode body having a positive electrode, a negative electrode, and a separator. The positive electrode and the negative electrode are stacked on each other with the separator interposed therebetween and are wound about a winding axis. The wound electrode body has a section perpendicular to the winding axis. The section has an elongated shape that includes a flat part and a pair of curved parts. The curved parts oppose each other with the flat part interposed therebetween. The negative electrode includes a negative electrode current collector and a negative electrode active material layer provided on the negative electrode current collector. A ratio of a second distance to a first distance is less than 1.

A battery includes a positive electrode having a first strip shape and a positive electrode lead, and a negative electrode having a second strip shape and a negative electrode lead. First ends of the positive electrode and the negative electrode in a longitudinal direction are on an inner peripheral side, and second ends of the positive electrode and the negative electrode in the longitudinal direction are on an outer peripheral side. The positive electrode lead and the negative electrode lead are extended out from a first end side in a width direction of the positive electrode and the negative electrode, and a first thickness of the positive electrode on the first end side is thinner than a second thickness of the positive electrode on a second end side in the width direction.

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

A battery is provided. The battery includes an electrode having a flat shape. The electrode is wound and includes a through hole. The through hole is further provided in a wound-back portion of the electrode.

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

A battery includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes an active material having grains and a binder having a reticulated structure. In this battery, spaces between the grains of the active material are filled with the reticulated structure of the binder.

Negative electrode, battery, battery pack, electronic device, electrically driven vehicle, power storage device, and power system

A secondary battery includes a cathode terminal; an anode terminal; a wound electrode body; and a step reducing member. The step reducing member is attached to one or both of a first cathode wound portion and a first anode wound portion in one or more of a first region, a second region and a third region. The first region is in a major axis direction outside the cathode terminal in a wound direction of a cathode, and the second region is in the major axis direction outside the anode terminal in the wound direction of an anode and the third region between the cathode terminal and the anode terminal.

Secondary battery, battery pack, electric vehicle, electric power storage system, electric tool, and electronic apparatus

A cryopump system includes at least one cryopump including a refrigerator including a low temperature cooling stage and a high temperature cooling stage, a low temperature cryopanel cooled by the low temperature cooling stage, and a high temperature cryopanel cooled by the high temperature cooling stage. A compressor unit includes a compressor main body that compresses a working gas supplied to the refrigerator, an operating frequency of the compressor main body being variable. The compressor unit is operated such that a pressure ratio between high pressure and low pressure of the compressor main body is in a range between 1.6 and 2.5.

Cryopump system and method of operating cryopump system

A secondary battery includes at least: a laminated electrode bodyin which an electrode memberand a separatorare laminated, in which a suppressing memberA suppressing a movement of the separatorwith respect to the electrode memberis disposed between a portionA of the electrode memberand a portion of the separator, in an uneven portionA existing in the laminated electrode body

A battery is provided. The battery includes a power generation element having a through hole; and a cylindrical can housing the power generation element and having at least one thin wall part on a circumferential surface of the cylindrical can. A ratio of a hole diameter of the through hole to an outer diameter of the power generation element is 17% or less. The thin wall part is provided in one or both of regions in a range from 0% to 30% and a range from 70% to 100% from one end of the circumferential surface.

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

A cathode active material includes a first cathode material configured of a layered rocksalt type lithium metal oxide, the layered rocksalt type lithium metal oxide including lithium and a metal other than lithium, the metal configured of nickel (Ni), or nickel (Ni) and the like. A site occupancy of metal ions other than lithium at a 3a site obtained by Rietveld analysis of a powder X-ray diffraction pattern of the first cathode material in a cathode in a discharged state is about 5% or less, and a site occupancy of metal ions other than the metal occupying a part of a 3b site at the 3b site is about 1% or over, and the cathode active material is covered with a coating film, and an exposed amount of the cathode active material exposed from the coating film is within a range from about 0.05% to about 8% both inclusive.

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Fukushima, Japan

Takaaki Matsui