DIRECT CURRENT DISTRIBUTION-BASED CHARGING/DISCHARGING SYSTEM FOR BATTERY ACTIVATION

Title:

DIRECT CURRENT DISTRIBUTION-BASED CHARGING/DISCHARGING SYSTEM FOR BATTERY ACTIVATION

Document Type and Number:

WIPO Patent Application WO/2022/103183

Kind Code:

A1

Abstract:

A charging/discharging system according to an embodiment of the present invention comprises: a main power conversion unit configured to convert an alternating current power from an AC power grid into a direct current power having a reference voltage so as to output the converted direct current power to a DC grid; a power meter configured to detect an output power of the main power conversion unit; a charging/discharging unit which is provided on a one-to-one basis to a plurality of batteries and includes a plurality of chargers/dischargers electrically coupled to the DC grid; and an integrated control unit configured to, if an output power from the main power conversion unit is greater than a first threshold power, selectively transmit a first control signal indicating a charging event or a second control signal indicating a discharging event to each charger/discharger on the basis of a predetermined activation schedule. Each charger/discharger is configured to convert a direct current power of the DC grid into a charging power so as to charge a battery in response to the first control signal, and convert a discharge power from the battery into a direct current power so as to output the converted direct current power to the DC grid in response to the second control signal. Each charger/discharger is configured to stop charging/discharging of the battery while the first and second control signals are not received.

Inventors:

KIM HONG-KYUN (KR)
LEE IK-JAE (KR)
SHIN JONG-KWANG (KR)
AN TAE-WOOK (KR)
YEO CHANG-SIN (KR)
WANG HEE-SEUNG (KR)
LEE CHAN-HEE (KR)
HONG JI-SU (KR)

Application Number:

PCT/KR2021/016473

Publication Date:

May 19, 2022

Filing Date:

November 11, 2021

Export Citation:

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Assignee:

LG ENERGY SOLUTION LTD (KR)

International Classes:

H02J3/32; G01R19/165; H02J7/34

Foreign References:

KR101431047B1	2014-08-21
KR101741883B1	2017-05-30
KR101925496B1	2018-12-05
JP2014193111A	2014-10-06
KR20180090673A	2018-08-13
KR20200152311A	2020-11-13

Other References: