Lg Energy Solution, Ltd.

Min Su Cho

Joo Hwan Sung

Min Gyu Kim

Yong Gon Lee

Je Jun Lee

Geon Woo Min

Jae Won Lim

Sang Hak Chae

Min Gi Jeong

Han Sol Park

Kwang Su Hwangbo

Geun Young Park

Byung Sup Kim

Yeong Hun Jung

Hak Kyun Kim

Min Seon Kim

A button-type secondary battery includes an electrode assembly; a lower can into which the electrode assembly is disposed; and an upper can configured to cover an opening of an upper end of the lower can. A beading part recessed inward is disposed at an upper portion of the lower can. The upper end of the lower can disposed above the beading part has a bent shape and configured to surround an edge end of the upper can so that the upper can and the lower can are coupled to each other.

Button-type secondary battery

A button-type secondary battery includes an electrode assembly; a lower can having an accommodation space in which the electrode assembly is accommodated; an upper can coupled to the lower can to cover the accommodation space; a gasket sealing a gap between the lower can and the upper can and to electrically insulate the lower can from the upper can while being inserted into a coupled portion of the lower can and the upper can; and a first electrode tab including a first coupling part coupled to a first electrode of the electrode assembly and a second coupling part coupled between the gasket, which is disposed at the coupled portion of the lower can and the upper can, and the upper can. The second coupling part is coupled between the gasket and the upper can by a pressure generated when the lower and upper cans are coupled to each other.

A button-type secondary battery includes an electrode assembly including a first separator, a negative electrode, a second separator, and a positive electrode that are sequentially stacked and wound, wherein ends of the first separator and the second separator are disposed closer to a center of the wound electrode assembly than ends of the positive electrode and the negative electrode; an electrolyte; and a can in which the electrode assembly and the electrolyte are accommodated. In the electrode assembly, an expansion member is attached to at least one central end of the first separator or the second separator, and the expansion member is expanded by absorbing the electrolyte.

A button-type secondary battery according to the present disclosure includes: an electrode assembly; a lower can configured to accommodate the electrode assembly; an upper can coupled to an opening of the lower can; a gasket configured to insulate a coupling portion between the lower can and the upper can; and a center part provided at a core portion of the electrode assembly, wherein the center part includes: a center pin inserted into the core portion of the electrode assembly; and an upper plate provided with an upper cover surface provided on an upper end of the center pin to protect an upper portion of the electrode assembly, wherein an edge of the upper cover surface is provided to be supported on an inner wall of the lower can.

A cylindrical secondary battery includes a jelly-roll type electrode assembly having a structure in which a long sheet type positive electrode and a long sheet type negative electrode are wound with a separator interposed between the positive electrode and the negative electrode. The cylindrical secondary battery also includes a cylindrical battery case configured to receive the jelly-roll type electrode assembly, and a piezoelectric element configured to generate electrical energy due to the volumetric expansion of the jelly-roll type electrode assembly caused by charging and discharging the jelly-roll type electrode assembly.

Growing community of inventors

Daejeon, South Korea

Min Su Cho