Title:
ESS SYSTEM FOR STORING ELECTRIC ENERGY IN BATTERY BY USING CHARGING OR DISCHARGING CHARACTERISTIC OF BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/256638
Kind Code:
A1
Abstract:
Disclosed is an ESS system for storing electric energy in a battery by using a charging or discharging characteristic of the battery. The system comprises: a power conversion unit (power conversion system (PCS)) for charging or discharging electric energy to or from the battery; a power management unit (power management system (PMS)) for monitoring and controlling state information including a voltage, a current, a temperature, and internal resistance of the power conversion unit and the battery; and a battery management unit (battery management system (BMS)) for estimating a state of charge (SOC) and a state of health (SOH) of the battery from the state information of the battery, and managing the battery on the basis of the estimated SOC and SOH, wherein the battery management unit comprises: a cell balancing unit for equalizing charging amounts of cells included therein; and a battery protection unit for predicting a residual lifetime of the battery on the basis of the estimated SOC and SOH, and preventing over-charging or over-discharging of the battery according to the predicted residual lifetime, so as to protect the battery. According to the present invention, a battery lifetime can be predicted while excluding temperature and time components, whereby energy can be stably stored.
Inventors:
BAE JONG HOON (KR)
SON SU HYEON (KR)
KIM SEONG RYONG (KR)
MOON SUNG CHUN (KR)
AN HAN YEUL (KR)
BAE KYUNG JIN (KR)
SON SU HYEON (KR)
KIM SEONG RYONG (KR)
MOON SUNG CHUN (KR)
AN HAN YEUL (KR)
BAE KYUNG JIN (KR)
Application Number:
PCT/KR2020/017778
Publication Date:
December 23, 2021
Filing Date:
December 07, 2020
Export Citation:
Assignee:
NASAN ELECTRIC IND CO LTD (KR)
International Classes:
H02J7/00; G01R31/382; G01R31/392; H01M10/42; H01M10/48
Foreign References:
| KR101923515B1 | 2018-11-29 | |||
| KR20170093482A | 2017-08-16 | |||
| JP2013069695A | 2013-04-18 | |||
| KR20150113414A | 2015-10-08 | |||
| US20170146608A1 | 2017-05-25 |
Attorney, Agent or Firm:
KIM, Sung Hyun (KR)
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