Title:
CYLINDRICAL SECONDARY BATTERY AND METHOD FOR MANUFACTURING SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2022/186491
Kind Code:
A1
Abstract:
An embodiment of the present invention relates to a cylindrical secondary battery comprising: a cylindrical can having one open end; an electrode assembly received in the can and comprising a first electrode plate, a separator, and a second electrode plate, which are stacked and wound in a cylindrical shape, the first electrode plate having a first electrode uncoated part, and the second electrode plate having a second electrode uncoated part disposed in a direction opposite to the first electrode uncoated part; and a cap assembly for closing the open end of the can while the electrode assembly is received in the can, wherein an end of at least one of the first electrode uncoated part and the second electrode uncoated part is bent to form a bending part. An embodiment of the present invention is advantageous for a welding process in that, when a current collection plate is welded, the thickness and number of weldable substrates are increased and the gaps between the substrates are reduced, thereby increasing the heat capacity of a welding part. Furthermore, there are fewer empty spaces between the substrates after the substrates are compacted for welding than a structure having no bending part, and thus the electrode plates or the separator can be prevented from being damaged due to the penetration of welding heat, thereby improving a stability risk.
Inventors:
JUNG HYUN KI (KR)
Application Number:
PCT/KR2022/001819
Publication Date:
September 09, 2022
Filing Date:
February 07, 2022
Export Citation:
Assignee:
SAMSUNG SDI CO LTD (KR)
International Classes:
H01M10/04; H01M50/538
Foreign References:
| JP2006004729A | 2006-01-05 | |||
| JP2007227137A | 2007-09-06 | |||
| JP2014222683A | 2014-11-27 | |||
| JP2001256954A | 2001-09-21 | |||
| KR20200143979A | 2020-12-28 |
Attorney, Agent or Firm:
SUNGAM SUH INTERNATIONAL PATENT & LAW FIRM (KR)
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