POWER CONVERSION DEVICE FOR PERFORMING DC-DC CONVERSION, AND ENERGY STORAGE SYSTEM INCLUDING SAME

WIPO Patent Application WO/2023/101204

A1

A high-efficiency, low-cost power conversion device for performing DC-DC conversion and an energy storage system including same according to an embodiment of the present invention may be provided, the power conversion device comprising: a series of batteries; and a DC-DC converter having an input connected to an output of the batteries, wherein a positive electrode output of the DC-DC converter is connected to a load, a negative electrode output of the DC-DC converter is connected to a positive electrode terminal of the batteries, and a negative electrode terminal of the batteries is connected to the load such that at least a portion of the power required by the load is supplied directly from the batteries without passing through the DC-DC converter, and thus the voltage level to which the voltage needs to be stepped up by the DC-DC converter is lower and power conversion efficiency is higher as compared to conventional technology in which all of the power required by the load is obtained from the batteries and converted by the DC-DC converter. Therefore, the power conversion device does not require additional configuration for power conversion efficiency, thus reducing the volume of the device and saving costs.

JPH05300663	CHARGER FOR MOBILE STATION
JP2021114855	NON-CONTACT POWER SUPPLY SYSTEM
JP7317801	Energy storage system and measurement method

LEE DAEWOO (KR)
PARK MI SO (KR)

PCT/KR2022/015583

June 08, 2023

October 14, 2022

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LG ENERGY SOLUTION LTD (KR)

H02J7/00; H02J3/32; H02M3/335

WO2021209613A1

2021-10-21

JP2010284064A	2010-12-16
KR101855451B1	2018-05-04
KR20160019237A	2016-02-19
JPH11299121A	1999-10-29
KR20210171671A

CHOI, Hee-Kyeong (KR)

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