Samsung Electronics Co., Ltd.

Samsung Sdi Co., Inc.

Kyung Hoon Cho

Jae Min Lim

Jea Woan Lee

Euy Sun Jung

Soo Mi Eo

Seung Hee Park

Jin-Suk Heo

Young Kwang Cho

Kyeong Yi Heo

Various embodiments of the present invention relate to a secondary battery, and the objective of the present invention is to provide a secondary battery, which has drop-impact resistance, by providing an electrode assembly having a relatively thick inner circumferential and a relatively thin outer circumferential tab. To this end, disclosed is a secondary battery, which comprises an electrode assembly comprising: an anode plate having an inner circumferential tab formed at a wound front end thereof; a separator covering the anode plate; and a cathode plate having an outer circumferential tab formed at a wound distal end thereof.

Secondary battery

An energy harvesting device includes at least one first magnet configured to rotate along a first circular path in a first plane. The energy harvesting device includes at least one piezo-electric cantilever spaced apart from the first plane, the at least one piezo-electric cantilever being configured to bend in a direction substantially perpendicular to the first plane. The energy harvesting device also includes at least one second magnet coupled to the at least one cantilever and configured to overlap the at least one first magnet.

Energy harvesting devices

Growing community of inventors

Yongin-si, South Korea

Kyung Hoon Cho