SECONDARY BATTERY AND DEVICE COMPRISING SAME

A secondary battery according to one embodiment of the present disclosure includes: a jelly-roll type electrode assembly in which a first electrode sheet, a second electrode sheet are wound with a separator interposed between the first electrode sheet and the second electrode sheet; and a first elec...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	JEONG, Ansoo
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	A secondary battery according to one embodiment of the present disclosure includes: a jelly-roll type electrode assembly in which a first electrode sheet, a second electrode sheet are wound with a separator interposed between the first electrode sheet and the second electrode sheet; and a first electrode tab which is joined to an uncoated portion of the first electrode sheet and is positioned at a central portion of the jelly-roll type electrode assembly, wherein the first electrode tab includes a joining portion joined to the uncoated portion and an extension portion extended outward from the joining portion, wherein a width of the joining portion is wider than the width of the extension portion, and wherein the joining portion is wound 3/4 times or more and once or less in the central portion of the jelly-roll electrode assembly.