ELECTRODE PLATE FOR NONAQUEOUS SECONDARY BATTERY, MANUFACTURING METHOD THEREOF, AND NONAQUEOUS SECONDARY BATTERY USING ELECTRODE PLATE THEREOF

PROBLEM TO BE SOLVED: To provide a nonaqueous secondary battery with high reliability in which cut of an electrode plate and fall-off of an electrode mixture layer are prevented while maintaining the amount of an electrode active material necessary for high capacity, by controlling the coating shape...

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Hauptverfasser: FUJIWARA ISAO, IWAGAMI YUJI
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a nonaqueous secondary battery with high reliability in which cut of an electrode plate and fall-off of an electrode mixture layer are prevented while maintaining the amount of an electrode active material necessary for high capacity, by controlling the coating shape and coating position of the electrode mixture layer coated and formed on a current collector.SOLUTION: In the nonaqueous secondary battery, a positive electrode plate 5 in which a positive electrode mixture layer 2 with only the end of winding start side in winding direction thinly made is coated and formed on a positive electrode current collector 1, a negative electrode plate 10 in which a thin negative electrode mixture layer 7 with only the end of winding start side in winding direction on a negative electrode current collector 6 is coated and formed, and a porous insulator 11 are wound around in an arrow direction of the drawing, thereby, the curvatures of the positive electrode plate 5 and the negative electrode plate 10 wound in the outer circumference are made small and an electrode group 12 close to a perfect circle is constructed.