Samsung Sdi Co., Inc.

Ho-Seong Kim

Cheon-Soo Kim

An electrode assembly is prepared by stacking and winding a first electrode, a second electrode, and a separator disposed between the first and second electrodes. The electrode assembly is curved to the center of an axis that is substantially parallel to a length direction of the electrode assembly, and the separator has a coated layer of a thermoplastic polymer on at least one side thereof. A battery cell including the electrode assembly, and a method of preparing the battery cell have also been disclosed. The battery cell including the electrode assembly may have a high strength.

Electrode assembly, battery cell including the electrode assembly, and method of preparing the battery cell

A case for secondary battery and a lithium secondary battery including the case, the case including: opposing main walls; opposing side walls connected to the main walls; and a bottom wall connected ends of the main and side walls. The bottom wall has a first notch extending between the main walls. The thickness of the bottom wall decreases from the side walls to a central portion thereof.

Case for secondary battery and lithium secondary battery using the same

A holder case for secondary battery having an improved longitudinal compression property and a lithium secondary battery using the same in which a case for secondary battery includes a case body and a first rib. The case body includes first and second long-side walls opposite to each other, first and second short-side walls, a bottom wall connected to one end portions of the two long-side walls and the two short-side walls, and an opening positioned at the other end portions of the two long-side walls and the two short-side walls while being opposite to the bottom wall. The first rib is disposed on the case body and extends from a middle portion of the first long-side wall to a middle portion of the second long-side wall via the second short-side wall.

Growing community of inventors

Yongin-si, South Korea

Ho-Seong Kim