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Patent Searching and Data


Title:
SECONDARY BATTERY AND DEVICE COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2021/075710
Kind Code:
A1
Abstract:
A secondary battery according to an embodiment of the present invention comprises: a jelly-roll electrode assembly in which a first electrode sheet, a second electrode sheet, and a separator provided between the first electrode sheet and the second electrode sheet are wound together; and a first electrode tab bonded to an uncoated portion of the first electrode sheet and provided at the central portion of the jelly-roll electrode assembly, wherein the first electrode tab comprises a bonding portion bonded to the uncoated portion and an extension portion extending from the bonding portion to the outside, the width of the bonding portion is greater than the width of the extension portion, and the bonding portion is wound 3/4 times or more and one time or less at the central portion of the jelly-roll electrode assembly.

Inventors:
JEONG ANSOO (KR)
Application Number:
PCT/KR2020/011676
Publication Date:
April 22, 2021
Filing Date:
September 01, 2020
Export Citation:
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Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M10/04
Domestic Patent References:
WO2018190691A12018-10-18
Foreign References:
KR100731453B12007-06-21
JP5311861B22013-10-09
JP2012169161A2012-09-06
KR20120139010A2012-12-27
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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