公开(公告)号：US09620785B2

公开(公告)日：2017-04-11

申请号：US14522068

申请日：2014-10-23

Applicant: OCI COMPANY LTD.

Inventor： Jong-Hwa Shon ,  Byung-Chul Kim ,  Soo-Whan Kim

IPC: H01M4/00 ,  H01M4/86 ,  H01M4/04 ,  H01M4/88 ,  H01M4/96 ,  H01M8/18

CPC classification number: H01M4/8631 ,  H01M4/04 ,  H01M4/0471 ,  H01M4/8875 ,  H01M4/96 ,  H01M8/188 ,  H01M2004/8694

Abstract: Disclosed is a carbon structure electrode for redox flow batteries, which includes a plurality of spherical macropores formed on a surface of a polymer-derived carbon structure and inside the polymer-derived carbon structure so as to allow electrolyte migration. The carbon structure electrode for redox flow batteries has excellent electrical conductivity and enables cost reduction through a simplified preparation process.

公开(公告)号：US09966626B2

公开(公告)日：2018-05-08

申请号：US15119908

申请日：2015-02-16

Applicant: OCI COMPANY LTD.

Inventor： Ji-Eun Hong ,  Seung-Yoen Lee ,  Soo-Whan Kim ,  Hee-Chang Ye ,  Byung-Chul Kim

IPC: H01M8/18 ,  H01M8/20 ,  H01M8/02

CPC classification number: H01M8/188 ,  H01M8/02 ,  H01M8/20 ,  Y02E60/528

Abstract: The present invention relates to a redox flow battery, and more particularly, to a redox flow battery which is charged and discharged by supplying a positive electrolyte and a negative electrolyte to a battery cell using an active material containing vanadium and a cation exchange membrane, in which the positive electrolyte and the negative electrolyte contain vanadium ions as active ions, the difference in volume between the positive electrolyte and the negative electrolyte is maintained at 10% or less, and the total concentration of anions in the negative electrolyte is higher than the total concentration of anions in the positive electrolyte, whereby the transfer of water in the battery is controlled and a change in the volume of the electrolytes is minimized.

公开(公告)号：US10290882B2

公开(公告)日：2019-05-14

申请号：US15535619

申请日：2015-12-16

Applicant: OCI COMPANY LTD.

Inventor： Min-Ki Hong ,  Eun-Sun Oh ,  Hee-Chang Ye ,  Byung-Chul Kim ,  Soo-Whan Kim

IPC: H01M8/04276 ,  H01M8/04537 ,  H01M8/18 ,  H01M8/04791 ,  H01M8/04858 ,  H01M8/04186

Abstract: According to one embodiment of the present invention, the method for controlling the pump speed of a redox flow battery for transferring an electrolyte stored in an electrolyte tank to a cell stack comprises the steps of: measuring the input power and/or the output power of the redox flow battery; measuring the charging power and/or the discharging power of the redox flow battery; calculating the power loss of the redox flow battery by using the difference between the input power and the charging power, or the difference between the output power and the discharging power; and adjusting the pump speed according to the power loss.