Sanyo Electric Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Holdings Corporation

Hiromasa Yagi

Hisaki Tarui

Yoichi Domoto

Shin Fujitani

Masahisa Fujimoto

Masaki Shima

Hiroaki Ikeda

Ryuji Ohshita

Yoshio Kato

Shigeki Matsuta

Hiroshi Nakajima

Hiroshi Kurokawa

Kenji Asaoka

Katsunobu Sayama

Isao Fujiwara

Kazuyoshi Honda

Ryoichi Wakimoto

Maruo Kamino

Hiroshi Minami

Kazuhiro Kitaoka

Daizo Jito

Yuma Kamiyama

Yasuyuki Kusumoto

Kei Kobayashi

Noriyuki Tamura

Masaki Hirase

Yasuharu Shinokawa

Atsushi Fukui

Ikuo Yonezu

Sadayuki Okazaki

Satoshi Shibutani

Daisuke Suetsugu

Toshikazu Yoshida

Yuko Ogawa

Hideo Kasahara

Tomofumi Yanagi

Hiroshi Okano

Mariko Torimae

Kunihiko Bessho

Takuya Oka

Nobuhiro Sakitani

Koji Endo

Hiroyuki Tajima

Shingo Nakano

An electrode for a secondary battery that includes a collector and an active material layer formed on the collector. The active material layer is configured of a plurality of layers including at least a first layer formed on the collector, and a second layer formed on the first layer. An end portion of the collector at an edge portion of the electrode is widened in an electrode thickness direction with respect to a plate thickness of the collector.

Electrode for secondary battery and secondary battery using same

An electrode body including positive electrode plate and negative electrode plate includes a positive electrode tab portion at an end portion on the sealing plate side. The positive electrode plate is electrically connected to a positive electrode collector including a collector body portion and a collector connection. A pressure-sensitive current breaking mechanism includes a conductive member including an opening portion on an electrode body side, a deformation plate that seals the opening portion, and a collector body portion that is disposed on the electrode body side of the deformation plate and that is connected to the deformation plate. The collector connection is disposed between the current breaking mechanism and one of the large-area side walls of the prismatic outer package, and the positive electrode tab portion is connected to the collector connection.

Prismatic secondary battery, assembled battery using the same and method of producing the same

A nonaqueous electrolyte secondary battery according to an embodiment includes an electrode assembly, a nonaqueous electrolyte, and a prismatic battery case accommodating the electrode assembly and the nonaqueous electrolyte. The mass energy density of the secondary battery is not less than 200 Wh/kg. The nonaqueous electrolyte secondary battery further includes a non-cellular elastic sheet disposed between the electrode assembly and the battery case. The ratio (A/B) of the thickness (A) of the elastic sheet at 100% SOC to the thickness (B) of the elastic sheet at 0% SOC is 0.05 to 0.3.

Nonaqueous electrolyte secondary battery and battery module

An electrode body including a positive electrode plate and a negative electrode plate include a positive electrode tab portion at an end portion on a sealing plate side, a positive electrode collector electrically connected to the positive electrode plate include a collector body portion, a collector extension portion, a collector connection, and a collector connection portion. A pressure-sensitive current breaking mechanism includes a conductive member having an opening portion on an electrode body side, a deformation plate that seals the opening portion, and a collector body portion disposed on the electrode body side of the deformation plate and connected to the deformation plate. The collector extension portion is offset from the collector body portion and is disposed on the sealing plate side with respect to the collector body portion. Positive electrode tab portion is connected to the collector connection bent back at an end portion of the collector extension portion.

Prismatic secondary battery and assembled battery using the same

A nonaqueous electrolyte secondary battery includes a conductive outer can, an electrode body in the outer can, a conductive seal plate tightly closing an open end of the outer can, and a cathode external terminal on the seal plate. The battery further includes a current cutoff mechanism (CID). The CID is located on the electrical conduction pathway between the cathode external terminal and the electrode body and interrupts the electrical coupling therebetween in response to an increased internal pressure in the battery. The CID includes a thin portion of the seal plate and a diaphragm. The diaphragm deforms to interrupt the electrical coupling between the cathode external terminal and the electrode body in response to the increase in the internal pressure in the battery. A cathode collector lead electrically couples the electrode body and the seal plate, and the seal plate connects the diaphragm and the cathode collector lead.

Nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery includes an electrode body and an electrolytic solution in an outer can and a cathode external terminal on the open-end side of the outer can. The battery further includes a current cutoff mechanism (CID). The CID is located on the electrical conduction pathway between the cathode external terminal and the electrode body and interrupts the electrical coupling therebetween in response to an increased internal pressure in the battery. The CID includes a seal lead, a diaphragm, and a dielectric film. The seal lead has a cylindrical opening on the electrode body side. The diaphragm tightly closes the cylindrical opening and, in response to the increased internal pressure in the battery, deforms to interrupt the electrical coupling between the electrode body and the seal lead. The dielectric film is on the electrode body side of the diaphragm.

Deterioration of the degree of vacuum in a vacuum chamber is prevented while securing adequate cooling performance by gas cooling. A substrateis provided in a vacuum, and the cooling bodyis provided close to a film non-formation surface of the substrate. A thin film is formed by depositing a film forming material on a film formation surface of the substratewhile introducing a cooling gas into between the substrateand the cooling body. At this time, a gas which reacts with the film forming material is introduced as the cooling gas.

Method for forming thin film while providing cooling gas to rear surface of substrate

A manufacturing method according to the present invention includes a step of allowing lithium to deposit on a substrate provided with a layer capable of forming a compound together with lithium. A first beta ray and a second beta ray are emitted toward the substrate for irradiation before the deposition step to measure backscattering, from the substrate, of the first beta ray and the second beta ray. The first beta ray and the second beta ray are emitted toward the substrate for irradiation after the deposition step to measure backscattering, from the substrate, of the first beta ray and the second beta ray. A decrement in backscattering of the first beta ray before and after lithium deposition and a decrement in backscattering of the second beta ray before and after lithium deposition are calculated. The deposition step is controlled depending on the decrement in the backscattering of the first beta ray and the decrement in the backscattering of the second beta ray.

Deposition quantity measuring apparatus, deposition quantity measuring method, and method for manufacturing electrode for electrochemical element

In a purifying method for metal grade silicon, metal grade silicon with a silicon concentration not less than 98 wt % and not more than 99.9 wt % is prepared. The metal grade silicon contains aluminum not less than 1000 ppm and not more than 10000 ppm by weight. The metal grade silicon is heated at a temperature not less than 1500&#xb0; C. and not more than 1600&#xb0; C. in an inert atmosphere under pressure not less than 100 Pa and not more than 1000 Pa, and maintained at the temperature in the atmosphere for a predetermined period.

Purifying method for metallic silicon and manufacturing method of silicon ingot

A rechargeable lithium battery including a negative electrode made by depositing a noncrystalline thin film composed entirely or mainly of silicon on a current collector, a positive electrode and a nonaqueous electrolyte, characterized in that said nonaqueous electrolyte contains carbon dioxide dissolved therein.

Lithium secondary battery and method for producing same

A negative electrode active material layercontaining at least one element selected from the group consisting of silicon, germanium, and tin is formed on a negative electrode collector. A negative electrodeis prepared by forming a lithium metal layer on the negative electrode active material layer. Also prepared is a positive electrodehaving a configuration in which a positive electrode active material layercontaining a composite oxide represented by a general formula LiMO, where 0.2&#x2266;x&#x2266;0.6, and M includes at least one transition metal selected from the group consisting of cobalt, nickel, and manganese, is formed on a positive electrode current collector. A lithium secondary batteryis assembled from the negative electrode, the positive electrode, and a separator

Lithium secondary battery manufacturing method comprising forming lithium metal layer and lithium secondary battery

A lithium secondary battery is provided with a positive electrode, a negative electrode (), a separator interposed between the positive and negative electrodes, and an electrode assembly having the negative electrode (), the positive electrode, and the separator. The negative electrode () has a negative electrode current collector () and negative electrode active material layers (), () formed on respective surfaces of the negative electrode current collector (). The negative electrode active material layers are composed of an alloy containing silicon, which intercalates and deintercalates lithium, and iron, which does not intercalate or deintercalate lithium. At least a portion of the electrode assembly has a curved portion in which the negative electrode active material layer () disposed inward relative to the negative electrode current collector contains a higher concentration of the iron than the negative electrode active material layer () disposed outward relative to the negative electrode current collector.

Lithium secondary battery

An electrode for a lithium battery having a thin film composed of active material capable of lithium storage and release, e.g., a microcrystalline or amorphous silicon thin film, provided on a current collector, the electrode being characterized in that a constituent of the current collector is diffused into the thin film.

Electrode for lithium batteries and rechargeable lithium battery

A method of manufacturing an electrode for a lithium secondary battery in which a thin film of active material is deposited on a current collector is provided that eliminates adverse effects on the battery caused by protrusions adhered on an electrode surface. The method of manufacturing an electrode for lithium secondary batteries includes depositing a thin film of active material on a current collector using thin-film deposition equipment as shown in FIG., and performing a compression process after depositing the thin film, whereby the heights of protrusions formed on the electrode surface are reduced.

Method of manufacturing electrode for lithium secondary batteries

Growing community of inventors

Nishinomiya, Japan

Hiromasa Yagi