Title:
SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/075990
Kind Code:
A1
Abstract:
An embodiment of the present invention relates to a secondary battery, and with respect to a technical problem to be resolved, provided is a secondary battery which has an electrode tab provided by forming a notch on a non-coated part of an electrode plate of an electrode assembly, and which can enable a current collecting plate to come into surface contact with the electrode tab. To this end, disclosed is a secondary battery comprising: an electrode assembly which comprises a first electrode plate coated with a first electrode active material and having a first non-coated part formed along an upper end thereof, a second electrode plate coated with a second electrode active material and having a second non-coated part formed along a lower end thereof, and a separator interposed between the first electrode plate and the second electrode plate, and which is wound in a jelly roll shape; a can for accommodating the electrode assembly; a cap assembly for sealing the can; a first current collecting plate electrically connected to the cap assembly by coming into contact with the first non-coated part; and a second current collecting plate electrically connected to the can by coming into contact with the second non-coated part, wherein the first non-coated part and/or the second non-coated part has a structure in which a plurality of isosceles trapezoidal electrode tabs are arranged to be adjacent to one another with notches formed at a specific angle (α) and at predetermined intervals from a start point thereof that is closest to a winding axis, and thus the first non-coated part and/or the second non-coated part are bent toward the winding axis.
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Inventors:
PARK JUNG HYUN (KR)
JEONG HYUN KI (KR)
OYAGI NOBUYUKI (KR)
LEE WON IK (KR)
KIM YOUNG CHANG (KR)
JEONG HYUN KI (KR)
OYAGI NOBUYUKI (KR)
LEE WON IK (KR)
KIM YOUNG CHANG (KR)
Application Number:
PCT/KR2019/012398
Publication Date:
April 16, 2020
Filing Date:
September 24, 2019
Export Citation:
Assignee:
SAMSUNG SDI CO LTD (KR)
International Classes:
H01M10/04; H01M50/531; H01M50/533
Foreign References:
| US20070298317A1 | 2007-12-27 | |||
| KR20160092748A | 2016-08-05 | |||
| JP2001297745A | 2001-10-26 | |||
| KR101674264B1 | 2016-11-08 | |||
| KR20170023595A | 2017-03-06 |
Other References:
See also references of EP 3866241A4
Attorney, Agent or Firm:
SUNGAM SUH INTERNATIONAL PATENT & LAW FIRM (KR)
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