Title:
ELECTRODE ASSEMBLY AND SECONDARY BATTERY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2019/074197
Kind Code:
A1
Abstract:
The present invention relates to an electrode assembly and a secondary battery comprising the same. The technical objective to be resolved is to provide an electrode assembly having a positive electrode tab and a negative electrode tab positioned such that the same are aligned on the same line approximately at the center of the radius of the cross section of the electrode assembly, and are attached so as not to overlap each other in the longitudinal direction, thereby making it possible to improve the winding roundness, and a positive electrode plate coating portion being formed on a positive electrode plate, which is adjacent to the negative electrode tab, and which has no positive electrode tab formed thereon, thereby preventing precipitation of lithium during overcharging. To this end, the present invention provides a secondary battery comprising an electrode assembly comprising a positive electrode plate having a positive electrode tab attached thereto, a negative electrode plate having a negative electrode tab attached thereto, and a separator interposed between the positive electrode plate and the negative electrode plate, wherein the positive electrode plate, the separator, and the negative electrode plate are wound while being laminated such that the positive electrode tab protrudes from the longitudinal upper portion of the electrode assembly by a predetermined length, the negative electrode tab protrudes from the longitudinal lower portion of the electrode assembly by a predetermined length, the positive electrode tab and the negative electrode tab are at a location corresponding to a value between 1/3 of the radius of the cross section of the electrode assembly and 2/3 thereof, and the lower portion of the positive electrode tab and the upper portion of the negative electrode tab do not overlap each other.
Inventors:
JEONG HYUN KI (KR)
PARK JUNG HYUN (KR)
OYAGI NOBUYUKI (KR)
PARK JUNG HYUN (KR)
OYAGI NOBUYUKI (KR)
Application Number:
PCT/KR2018/008706
Publication Date:
April 18, 2019
Filing Date:
July 31, 2018
Export Citation:
Assignee:
SAMSUNG SDI CO LTD (KR)
International Classes:
H01M10/04; H01M10/0587; H01M50/534; H01M50/536
Foreign References:
| KR20150083633A | 2015-07-20 | |||
| KR20160051132A | 2016-05-11 | |||
| KR20150143030A | 2015-12-23 | |||
| KR20160110610A | 2016-09-22 | |||
| JP2007227357A | 2007-09-06 |
Other References:
See also references of EP 3696899A4
Attorney, Agent or Firm:
SUNGAM SUH INTERNATIONAL PATENT & LAW FIRM (KR)
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