Samsung Sdi Co., Inc.

Geunho Seo

Sunggwi Ko

A secondary battery includes: a cylindrical can; an electrode assembly accommodated in the cylindrical can with an electrolyte; and a cap assembly sealing the cylindrical can. The cap assembly includes a cap-up having a terminal portion, a bent portion downwardly bent from the terminal portion, and an extending portion outwardly extending from the bent portion. The terminal portion has a smaller thickness than the extending portion, and a top-end height of the terminal portion of the cap-up is equal to or less than that of the cylindrical can.

Secondary battery

A secondary battery includes an electrode assembly, a case accommodating the electrode assembly, and a cap assembly coupled to a top portion of the case. The cap assembly includes a cap-up, a safety vent under the cap-up, a cap-down under the safety vent, an insulator between the safety vent and the cap-down, and a sub-plate on a bottom surface of the cap-down. Laser patterns formed by using a laser beam are on a bottom surface of the safety vent and a top surface of the cap-down.

Growing community of inventors

Yongin-si, South Korea

Geunho Seo