Toshiba Battery Co., Ltd.

Nissan Motor Company Limited

Envision Aesc Japan Ltd.

Muneto Hayami

Masami Suzuki

Kazuo Udagawa

Hirotaka Sakai

Masataka Shikota

Kazuo Iizuka

Naomi Ishihara

Satoshi Hirahara

Kiyoto Yoda

Masashi Watanabe

Ryuichi Amagai

Teruo Segawa

Yuuji Tanjou

Masayasu Ota

Tsuyoshi Enokida

Hiroaki Kishimoto

Koji Kano

A combined battery () comprising a plurality of flat-type cells (A toF) by laminating thereof so that polarity of electrode tabs (A toF andA toF) is alternately set, wherein welding parts to connect in series the flat cells themselves, to compose a set when all the flat-type cells (A toF) are laminated, are separated at a plurality of positions of the combined battery, and the flat-type cells having such a structure that all the flat-type cells are electrically connected in series by welding each of the welding parts.

Assembled battery and manufacturing method thereof

A liquid action substance battery having its external terminal welded after assembling the battery in which safety of the battery is enhanced by protecting an explosion-proof valve against being torn apart in the subsequent welding work of the external terminal even if the position of a negative pole action substance being press-bonded to the inner surface of the battery can is shifted and that substance is extruded to the bottom face of the battery can. The liquid action substance battery employing an alkaline metal such as lithium, sodium or potassium or its alloy as the negative pole action substance, and an oxyhalide such as thionyl chloride, sulfuryl chloride or phosphoryl chloride in a liquid state at normal temperature as the positive pole action substance, and storing and sealing the negative pole action substance and the positive pole action substance in the bottomed battery, wherein a metal plate is welded to the inner surface at the bottom part of the battery can to form a partial space between them so that welding heat is not transmitted directly to the negative pole action substance when the external terminal is welded.

Liquid action substance battery

A non-aqueous electrolyte secondary cell containing an electricity-generating element with at least a cathode, a separator and an anode and a non-aqueous electrolyte inside a cathode case, electrode units each consisting of the cathode and the anode opposite to each another via the separator laminated to form an electrode group, or an electrode unit in a sheet form consisting of the cathode and the anode opposite to each another via the separator wound to form an electrode group, or a sheet-shape cathode wrapped with the separator except for a part contacting at inner face of cathode case and a sheet-shaped anode set on the sheet-shaped cathode in a right angled position each other and bent alternately to form an electrode group, and the total sum of the areas of the opposing cathode and anode in the electrode group larger than the area of the opening of an insulating gasket in a sealed portion in the cathode case or than the area of an opening in a sealed plate in a sealed portion in the cathode case.

Flat non-aqueous electrolyte secondary cell

In a flat non-aqueous electrolyte secondary cell comprising an electricity-generating element including at least a cathode, a separator and an anode and a non-aqueous electrolyte in the inside of a cathode case, a plurality of electrode units each consisting of the cathode and the anode opposite to each another via the separator are laminated to form an electrode group, or an electrode unit in a sheet form consisting of the cathode and the anode opposite to each another via the separator is wound to form an electrode group, or a sheet-shape cathode is wrapped with the separator except for a part contacting at inner face of cathode case and a sheet-shaped anode is set on the sheet-shaped cathode in a right angled position each other and then these cathode and anode are bent alternately to form an electrode group, and the total sum of the areas of the opposing cathode and anode in this electrode group is larger than the area of the opening of an insulating gasket in a sealed portion in the cathode case or than the area of an opening in a sealed plate in a sealed portion in the cathode case, whereby the discharge capacity upon heavy-loading discharge is significantly increased as compared with the conventional cells. Accordingly, while the size of the cell is small, the discharge capacity is increased as described above, and thus it is possible to provide a highly utilizable flat non-aqueous electrolyte secondary cell. Further, in said flat non-aqueous electrolyte secondary cell, problems which may be caused by the increased discharge capacity in the cell can be solved by improving the solvent and supporting electrolyte for the electrolyte or by various improvements in the cathode and anode cases.

Growing community of inventors

Kanagawa, Japan

Muneto Hayami