Sanyo Electric Co., Ltd.

Jun Okazaki

Ryuji Ohshita

Yoshinobu Okumura

Hitoshi Tanaka

Yoshikumi Miyamoto

Toshirou Yanagawa

Tadatoshi Fukuta

To provide a non-aqueous electrolyte secondary battery adapted to prevent an internal short circuit between an positive electrode and a negative electrode caused by the penetration of electrically conductive micro particles through a separator, which occurs when winding up electrodes, and manufacturing methods of an electrode used therein, whereby the non-aqueous electrolyte secondary battery having a coiled electrode assembly is formed through the multilayer winding of an positive electrodehaving a metallic collectorcoated with an positive electrode mixturecomposed of an positive electrode active material that occludes and liberates lithium ions, a negative electrodehaving a metallic collectorcoated with a negative electrode mixture, composed of a negative electrode active material that occludes and liberates lithium ions, and a separatorinterposed between the positive electrode and the negative electrode, wherein the positive electrodehas an insulating layerformed by means of the dried coating method, the heat seal tape method, or the hot melt coating method on a portion of the metallic collectorwhich is uncoated with the positive electrode mixtureand opposed to the negative electrodecoated with the negative electrode mixture, through the separator

Non-aqueous electrolyte secondary battery and manufacturing methods of an electrode used therein

An electrode plate for a secondary battery is provided for reducing adverse influences caused by paste of an insulating sheet in an electrode body and a battery specification. Active material layerstoand 22' to&#x2032; are formed on at least one surface of an electrode sheetover a wider range than a predetermined width of an electrode and over a predetermined length. An insulating sheetis made to adhere to a possible short-circuit portion of the electrode sheetwhich portion is opposed to another electrode. The electrode sheetand an insulating member are simultaneously cut to form an electrode plate having a predetermined shape, wherein the insulating member has a low-temperature thermoplastic paste material applied on one side thereof, and is made to adhere to the electrode sheetthrough heat adhesion.

Electrode plate for secondary battery, method of manufacturing the same, and secondary battery using the same

Growing community of inventors

Itano-gun, Japan

Jun Okazaki