Maxell Holdings, Ltd.

Hitachi, Ltd.

Hitachi Maxell, Limited

Kunihiko Koyama

Takahiro Furutani

Hiroaki Ono

Katsuyuki Kito

Eri Kojima

Mitsutoshi Watanabe

Satoshi Kobayashi

Toshihiko Ishihara

Toshiyuki Watanabe

Hirofumi Tagawa

Hirokazu Nomura

When a coin-type battery is manufactured using a sealing can in which a fold portion is not provided in a side wall portion, a coin-type battery with excellent reliability, which has excellent mass productivity and sealing properties and a capacity of which has been increased by increasing a housing space in which an electrode body is housed is manufactured. An open end portion of a side wall portion of a sealing can is formed not to bend toward an inner circumference side and an outer circumference side, an edge of the open end portion is formed not to have a sharp angle, a cut off portion is formed in an inner circumference side of an upper end portion, the sealing can is fitted to a gasket an inner diameter of which is made smaller than an external diameter of the side wall portion of the sealing can, an exterior can is caulked, thereby manufacturing a coin-type battery.

Coin-type battery and manufacturing method thereof

Provided are an air cell that has a reduced environmental impact and has favorable discharge characteristics as well as a patch equipped with the air cell. An air cell of the present invention includes, an outer case, which contains a positive electrode having a catalyst layer containing a catalyst and a binder, a negative electrode containing a metal material, a separator, and an electrolytic solution. The electrolytic solution is an aqueous solution with a pH of 3 or more and less than 12. The separator has an air permeability of 10 sec/100 ml or more, or the positive electrode has a porous sheet made of carbon as a current collector. A patch of the present invention includes the air cell of the present invention as a power supply.

Air cell and patch

A method for charging a lithium ion secondary battery of the present invention includes a first step and a second step. In the first step, A, B, and C satisfy the relationship A&#x3e;B and B&#x3c;C, where A represents an average charging current value in the range where a charge rate of the lithium ion secondary battery is 0% or more and less than 40%, B represents an average charging current value in the range where the charge rate is 40% or more and 60% or less, and C represents an average charging current value in the range where the charge rate is more than 60%. In the first step, the ratio of Cto C(C/C) is 1.01 to 3.00, where Crepresents the maximum value of the charging current value and Crepresents the minimum value of the charging current value.

Charging method for lithium ion secondary battery and charging control system therefor, and electronic apparatus and battery pack having charging control system

The present invention relates to an electrode for a non-aqueous electrolyte secondary battery, a non-aqueous electrolyte secondary battery using the electrode, and a method for manufacturing the non-aqueous electrolyte secondary battery. The electrode for a non-aqueous electrolyte secondary battery includes a material mixture layer containing an active material and a porous insulating layer. The insulating layer is formed on the material mixture layer. The insulating layer contains a resin having a cross-linked structure and inorganic particles. A mixed layer that includes components of the insulating layer and components of the material mixture layer is provided at the interface between the insulating layer and the material mixture layer.

Electrode for non-aqueous electrolyte secondary battery, non-aqueous electrolyte secondary battery, and method for manufacturing the same

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Kyoto, Japan

Kunihiko Koyama