ELECTRODE ASSEMBLY AND SECONDARY BATTERY COMPRISING SAME

Title:

ELECTRODE ASSEMBLY AND SECONDARY BATTERY COMPRISING SAME

Document Type and Number:

WIPO Patent Application WO/2019/160236

Kind Code:

A1

Abstract:

The present invention relates to an electrode assembly and a secondary battery comprising same. Since an anode tab and a cathode tab are welded to a plurality of anode uncoated portions and a plurality of cathode uncoated portions of the electrode assembly to serve as a current collector plate, the present invention can prevent a roundness decrease, deformation, etc., which can be caused by expansion of a silicon-based anode active material that is applied for high capacitance, and at the same time, promotes high power output and low resistance. To this end, the present invention relates to an electrode assembly comprising: a cathode plate to which a cathode tab is attached; an anode plate to which an anode tab is attached; and a separator interposed between the cathode plate and the anode plate, the electrode assembly being wound while the cathode plate, the separator, and the anode plate are laminated, wherein the cathode plate protrudes more upward than the separator and the anode plate so as to be exposed through an upper surface of the electrode assembly, and the anode plate protrudes more downward than the separator and the cathode plate so as to be exposed through a bottom surface of the electrode assembly, wherein the cathode tab extends along the upper surface of the electrode assembly while in contact with the cathode plate exposed through the upper surface of the electrode assembly, and is welded to a plurality of cathode plates being contacted, and the anode tab extends along the bottom surface of the electrode assembly while in contact with the anode plate exposed through the bottom surface of the electrode assembly, and is welded to a plurality of anode plates being contacted.

Inventors:

JEONG HYUN KI (KR)

Application Number:

PCT/KR2018/016380

Publication Date:

August 22, 2019

Filing Date:

December 20, 2018

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SAMSUNG SDI CO LTD (KR)

International Classes:

H01M10/04; B23K26/21; H01M4/38; H01M4/66; H01M10/0587; H01M50/533; H01M50/538; B23K101/38; H01M50/534; H01M50/536

Foreign References:

KR20160085063A	2016-07-15
KR101038115B1	2011-05-31
KR101615712B1	2016-04-26
US20090297941A1	2009-12-03
KR20110035566A	2011-04-06

Other References: