Samsung Sdi Co., Inc.

Ho Jun Shin

Hyun Yeul Lee

Hyun Soo Lee

Sang Won Byun

Jun Min Choi

Young Sik Moon

Sang Won Kim

The present invention relates to a secondary battery and a method for manufacturing same, and the technical problem to be solved is to prevent damage due to fatigue loading that may occur during ultrasonic welding between an electrode tab and an auxiliary tab, by strongly laser welding between the auxiliary tab and a current collecting portion of a single plate. To this end, disclosed is a secondary battery and a method for manufacturing same, wherein the secondary battery comprises: an electrode assembly having an electrode tab; an auxiliary tab which is a metal single plate mechanically and electrically coupled to the electrode tab; and a current collecting portion which is mechanically and electrically coupled to the auxiliary tab, wherein the auxiliary tab comprises: a tab connection portion welded to the electrode tab; a current collecting connection portion welded to the current collecting portion and disposed parallel to the tab connection portion; and a bending portion which connects between the tab connection portion and the current collecting connection portion and surrounds one side of the current collecting portion.

Secondary battery and method for manufacturing same

A secondary battery includes: an electrode assembly including a first electrode plate and a second electrode plate, and electrode uncoated portions protruding at opposite sides of the electrode assembly, a case accommodating the electrode assembly; a current collector including an electrode connecting portion located at a region corresponding to an electrode uncoated portion of the electrode uncoated portions and including a coupling groove located in a surface of the electrode connecting portion, and a terminal connecting portion bent from the electrode connecting portion and extending over the electrode assembly; and a sub-tab including a first region coupled to the coupling groove, and a second region bent from the first region and connected to the electrode uncoated portion.

Secondary battery

Growing community of inventors

Yongin-si, South Korea

Ho Jun Shin