A rechargeable lithium-ion battery and a manufacturing method for the same

Japanese Patent JP6137550

B2

A lithium-ion secondary battery (10) includes a wound electrode assembly (40) having a positive electrode current collector foil (51) and a negative electrode current collector foil 61). An edge portion (52) of the positive electrode current collector foil (51) is exposed in a spiral form at one end of a winding axis (WL). An edge portion (62) of the negative electrode current collector foil (61) is exposed in a spiral form at the other end of the winding axis (WL). The spirally exposed edge portion (52) of the positive electrode current collector foil (51) is divided and gathered into a plurality of parts divided at at least one of a plurality of gaps (S), excluding a central portion (WC) containing the winding axis (WL), provided between wound layers of the positive electrode current collector foil (51) stacked in a direction orthogonal to the winding axis (WL). Likewise, the spirally exposed edge portion (62) of the negative electrode current collector foil (61) is divided and gathered into a plurality of parts divided at at least one of a plurality of gaps (S), excluding the central portion (WC) containing the winding axis (WL), provided between wound layers of the negative electrode current collector foil (61) stacked in a direction orthogonal to the winding axis (WL).

JP4797238	battery
JP2000294295	NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
JP2016115471	FLAT BATTERY

Ueno Yoshiyuki
Hideki Sano
Kaoru Inoue
Hideaki Fujita

JP2014001751A

May 31, 2017

January 08, 2014

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TOYOTA JIDOSHA KABUSHIKI KAISHA

H01M10/0587; H01M10/0525; H01M10/0566; H01M50/103; H01M50/40

JP10261441A
JP2008041526A
JP2002025626A

Makoto Abe
Michiko Oi
Hiroaki Yamane

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