Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Other

Toyota Jidosha Kabushiki Kaisha

Panasonic Intellectual Property Management Co., Ltd.

Kohei Suzuki

Tsumoru Ohata

Tetsuya Hayashi

Masao Fukunaga

Shigeo Ikuta

Kaoru Inoue

Junji Nakajima

Kazunori Kubota

Akiko Fujino

Munehisa Ikoma

Yusuke Fukumoto

Takashi Takano

Akira Kuroda

Masato Fujikawa

Kouji Nishida

Motoi Kawamura

Mikinari Shimada

Kiyomi Kato

Yoshinori Toyoguchi

Osamu Yamamoto

Seiji Yamaguchi

Katsunori Komori

Jun Matsumura

Masaaki Kobayashi

Hiroshi Inoue

Hiroshi Yoshizawa

Hiroshi Kawano

Hideharu Takezawa

Nobuyasu Morishita

Hideaki Fujita

Tadao Kimura

Shinji Kasamatsu

Yoshihiro Morioka

Takashi Takeuchi

Akihiro Taniguchi

Kohji Yuasa

Katsumi Kozu

Noriyuki Fujioka

Masanori Sumihara

Shuji Tsutsumi

Noboru Ito

Mitsugu Takaki

Katsumi Kashiwagi

Etsuto Nakatsu

Kozo Watanabe

Toshihide Murata

Takao Kuromiya

Nobuyuki Yanagihara

Akira Nagasaki

Mutsuyuki Okayama

Mitsuhiro Takeno

Takaya Saito

Tsuyoshi Hatanaka

Kazunari Ando

Akira Ota

Yasuhiro Inadomi

Ayako Tanaka

A lead-acid battery of the present invention includes electrode plate units, each including a positive electrode plate, a negative electrode plate, and a separator. The positive electrode plate is a positive electrode grid filled with paste including powder of lead oxide as a main component. The negative electrode plate is a negative electrode grid filled with paste including powder of lead oxide as a main component, and including carbon black. The positive electrode plate faces the negative electrode plate. The separator is provided between the positive electrode plate and the negative electrode plate. The positive electrode grid includes gates, each being generally diamond-shaped, and being more than or equal to 50 mmand less than or equal to 100 mmin area. The carbon black has a DBP oil absorption of more than or equal to 140 ml/100 g and less than or equal to 340 ml/100 g.

Lead-acid battery

A lithium secondary battery that is excellent in resistance to short-circuits and heat, is unlikely to suffer a capacity loss due to impact such as dropping, and has a high capacity. The lithium secondary battery includes an electrode assembly including a strip-like positive electrode and a strip-like negative electrode that are wound together with a porous heat-resistant layer interposed therebetween, a non-aqueous electrolyte, and a battery can. The battery has a restricting part for restricting vertical movement of the electrode assembly. The distance A from the restricting part to the inner bottom face of the battery can and the width B of the negative electrode satisfy the relation: 0.965&#x2266;B/A&#x2266;0.995.

Lithium secondary battery

A lithium ion secondary battery includes a positive electrode capable of absorbing and desorbing lithium ion, a negative electrode capable of absorbing and desorbing lithium ion, a porous film interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, the porous film being adhered to a surface of at least the negative electrode. The porous film includes an inorganic filler and a first binder: The content of the first binder in the porous film is 1.5 to 8 parts by weight per 100 parts by weight of the filler: The first binder includes a first rubber including an acrylonitrile unit: The first rubber is water-insoluble and has a decomposition temperature of 250&#xb0; C. or higher. The negative electrode includes a negative electrode active material capable of absorbing and desorbing lithium ion and a second binder, and the second binder includes a second rubber particle and a water-soluble polymer.

Lithium ion secondary battery

A non-aqueous electrolyte secondary battery including: a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; a non-aqueous electrolyte; and a porous insulating film adhered to a surface of at least one selected from the group consisting of the positive electrode and the negative electrode, the porous insulating film including an inorganic oxide filler and a film binder, wherein the ratio R of actual volume to apparent volume of the separator is not less than 0.4 and not greater than 0.7, and wherein the ratio R and a porosity P of the porous insulating film satisfy the relational formula: &#x2212;0.10&#x2266;R&#x2212;P&#x2266;0.30.

Non-aqueous electrolyte secondary battery

A lithium ion secondary battery includes a positive electrode capable of absorbing and desorbing lithium ion, a negative electrode capable of absorbing and desorbing lithium ion, a porous film interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte: the porous film being adhered to a surface of at least one of the positive electrode and the negative electrode; the porous film including a filler and a resin binder; the resin binder content in the porous film being 1.5 to 8 parts by weight per 100 parts by weight of the filler; and the resin binder including an acrylonitrile unit, an acrylate unit, or a methacrylate unit.

Disclosed is a non-aqueous electrolyte secondary battery having an electrode group in which a positive electrode and a negative electrode are spirally wound with a separator interposed therebetween. The positive electrode contains a positive electrode active material and a binder. The positive electrode active material contains a mixture of two different particulate substances having different average particle sizes. The two different particulate substances are lithium composite metal oxides containing nickel as an essential element. The binder includes fluorocarbon resin and rubber particles. The fluorocarbon resin contains at least a vinylidene fluoride unit. The amount of the rubber particles per 100 parts by weight of the fluorocarbon resin is 1 to 25 parts by weight.

A method for producing a non-aqueous electrolyte secondary battery comprising the steps of: (i) mixing a positive electrode active material, a first binder A and a dispersion medium to prepare a paste A, the active material comprising a lithium-containing transition metal oxide; (ii) mixing a conductive agent, a second binder B and a dispersion medium to prepare a paste B, the conductive agent comprising carbon black; (iii) mixing the paste A and the paste B to prepare a positive electrode material paste C; (iv) applying the positive electrode material paste C onto a positive electrode core member and rolling and drying the resultant member to prepare a positive electrode; and (v) fabricating a battery using the positive electrode, a negative electrode and a non-aqueous electrolyte, wherein contact angle &#x3b8;between the non-aqueous electrolyte and the binder A and contact angle &#x3b8;between the non-aqueous electrolyte and the binder B satisfy the formula (1): &#x3b8;&#x2212;&#x3b8;&#x2267;15&#xb0;.

Production method of non-aqueous electrolyte secondary battery

Provided is a power supply unit for supplying power to an electric apparatus, comprising an indicator unit, an introduction-detecting unit for detecting introduction of the electric apparatus into a vehicle for transportation of the electric apparatus, a voltage-detecting unit for detecting the voltage of the power source, a memory unit for storing a first voltage and a second voltage lower than the first voltage, a judgment unit for determining whether the voltage of the power source detected by the voltage-detecting unit is higher than the first voltage and a forced discharge unit. The forced discharge unit is configured to cause the indicator unit to notify if the electric apparatus is in a state prohibiting introduction into the vehicle and forcibly discharge the power source.

Power supply unit and electric apparatus

A method for manufacturing a positive electrode plate for a non-aqueous secondary battery including: preparing an active material A, a conductive material B, a binder C, a thickener D, and a liquid component E, the thickener D being in a powder state, the conductive material B including a carbon material, the thickener D including a water-soluble polymer, and the liquid component E including water; preparing a slurry including the component E and an electrode material mixture, the material mixture including the active material A, the conductive material B, the binder C, and the thickener D; and applying the slurry on a current collector. In preparing the slurry, the thickener D in a powder state, the active material A and the conductive material B are kneaded together with the liquid component E, and then the primary kneaded matter, the binder C, and an additional liquid component are kneaded.

Electrode plate of positive electrode for non-aqueous electrolyte secondary battery and manufacturing method thereof

A lithium ion secondary battery including: an electrode group including a belt-like positive electrode and a belt-like negative electrode that are wound with a separator interposed therebetween; and a can with a bottom for accommodating the electrode group, wherein the positive electrode has a positive electrode current collector and a positive electrode mixture layer carried on the positive electrode current collector, the negative electrode has a negative electrode current collector and a negative electrode mixture layer carried on the negative electrode current collector, and a porous heat-resistant layer is partially provided between the separator and at least one of the positive electrode mixture layer and the negative electrode mixture layer. Since a porous heat-resistant layer is thus placed, a high performance lithium ion secondary battery capable of efficiently preventing internal short circuit due to overheating while preventing decrease in battery characteristics can be provided.

A lithium ion secondary battery has an electrode group including: a winding core; and a positive electrode and a negative electrode that are wound around the winding core. This electrode group does not have an independent separator between the positive and negative electrodes. A porous film is integrally formed on both sides of at least one of the positive electrode and the negative electrode. The negative electrode and the positive electrode are connected to the winding core by a negative electrode resin film and a positive electrode resin film, respectively. The use of such resin films makes it possible to reduce the breakage of the porous films and prevent a short-circuit between the positive and negative electrodes.

Lithium ion secondary battery and method for manufacturing the same

Nonaqueous electrolyte secondary battery

Growing community of inventors

Yao, Japan

Kohei Suzuki