US 12,255,482 B2
Plug-in type energy storage system
Dong Hwa Han, Daejeon (KR); and Yong Uk Kim, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Dec. 23, 2021, as Appl. No. 17/560,768.
Claims priority of application No. 10-2021-0000936 (KR), filed on Jan. 5, 2021.
Prior Publication US 2022/0216716 A1, Jul. 7, 2022
Int. Cl. H02J 7/00 (2006.01); H01M 10/42 (2006.01); H01M 10/46 (2006.01); H01M 50/204 (2021.01); H01M 50/251 (2021.01); H02J 7/02 (2016.01)
CPC H02J 7/00712 (2020.01) [H01M 10/425 (2013.01); H01M 10/46 (2013.01); H01M 50/204 (2021.01); H01M 50/251 (2021.01); H02J 7/00036 (2020.01); H02J 7/0013 (2013.01); H02J 7/0029 (2013.01); H02J 7/0048 (2020.01); H02J 7/02 (2013.01); H01M 2010/4271 (2013.01); H01M 2220/10 (2013.01); H02J 2207/20 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A plug-in type energy storage system, the system comprising:
one or more clusters connected to a grid through transformer,
wherein each cluster comprises:
a plurality of battery racks configured to store power; and
a panel configured to control charging or discharging of each battery rack, wherein the plurality of battery racks is connected to the panel by a predetermined number to form one cluster and the energy storage system is controlled in units of cluster,
wherein each battery rack comprises:
a plurality of battery modules configured to store the power, each battery module including a plurality of battery cells;
a control module connected to each battery module and the panel to control the charging or discharging of each battery module according to a control signal received from the panel; and
a conversion module connected to the control module to convert waveforms of the power into direct current or alternating current according to a control signal received from the control module,
wherein the panel comprises:
an energy management system configured to generate a control signal for controlling the charging or discharging of the plurality of battery racks and provide the control signal to each of the plurality of battery racks; and
an AC bus connected to the transformer, wherein the plurality of battery racks are connected to AC bus in parallel to transmit AC power, and
wherein the energy storage system is configured to, according to the type or a charge state of each of the plurality of battery racks, simultaneously control at least one battery rack to be charged and at least another battery rack to be discharged, or control an amount of power to be charged to or discharged from the at least one battery rack and the at least another battery rack to be different from each other.