Samsung Sdi Co., Inc.

Robert Boschgmbh

Eun-Jung Kim

In Hyuk Kim

Duk-Jung Kim

Soo-Seok Choi

Hyung-Sik Kim

Jae-Kyung Kim

Yong-Shik Hwang

Sang-Woon Yang

Young-Eun Kim

A positive electrode composition for a rechargeable lithium battery includes a positive active material, a spherically shaped conductive material, and a sheet-shaped conductive material. The spherically shaped conductive material is included in an amount of about 1.1 to about 10 parts by weight based on 1 part by weight of the sheet-shaped conductive material. A positive electrode includes the positive electrode composition and a rechargeable lithium battery includes the positive electrode.

Positive electrode composition for rechargeable lithium battery, and positive electrode for rechargeable lithium battery and rechargeable lithium battery including the same

A system for measuring a length of an electrode plate includes a body on which an electrode plate roll formed by spirally winding the electrode plate is provided; a control device to which the body is combined; and a measuring device including a thickness measurement unit combined with the body and electrically connected to the control device to measure a spirally wound thickness of the electrode plate that is spirally wound on the electrode plate roll, and a diameter measurement unit to measure a diameter of a hollow portion of the electrode plate roll, wherein the control device receives a moving distance of the thickness measurement unit and a moving distance of the diameter measurement unit and calculates the length of the electrode plate of the electrode plate roll.

Device for measuring length of electrode plate

Growing community of inventors

Yongin-si, South Korea

Eun-Jung Kim