US 12,368,317 B2
Energy storage apparatus, energy storage apparatus control method, and photovoltaic system
Shijiang Yu, Shanghai (CN); Zhipeng Wu, Shenzhen (CN); He Zhou, Shanghai (CN); Lei Shi, Shanghai (CN); and Yang Hu, Shenzhen (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Guangdong (CN)
Filed on Dec. 30, 2023, as Appl. No. 18/401,455.
Application 18/401,455 is a continuation of application No. PCT/CN2022/101667, filed on Jun. 27, 2022.
Claims priority of application No. 202110732769.2 (CN), filed on Jun. 30, 2021.
Prior Publication US 2024/0136850 A1, Apr. 25, 2024
Prior Publication US 2024/0235252 A9, Jul. 11, 2024
Int. Cl. H02J 9/06 (2006.01); H02J 3/00 (2006.01); H02J 3/32 (2006.01); H02J 7/35 (2006.01)
CPC H02J 9/068 (2020.01) [H02J 3/0012 (2020.01); H02J 3/32 (2013.01); H02J 7/35 (2013.01); H02J 9/061 (2013.01); H02J 2207/20 (2020.01); H02J 2300/24 (2020.01)] 12 Claims
OG exemplary drawing
 
1. An energy storage apparatus configured to supply power to a power grid;
the energy storage apparatus comprises:
a plurality of battery clusters;
a plurality of conversion units;
a start unit;
a controller wherein
the power grid is configured to supply power to the controller,
the controller comprises a plurality of control units,
the plurality of battery clusters are in a one-to-one correspondence with the plurality of control units and the plurality of conversion units,
each battery cluster is connected to a corresponding conversion unit,
each battery cluster comprises a battery pack and a control switch,
each conversion unit comprises a direct current to direct current DC-DC converter,
each DC-DC converter is connected to a direct current bus;
the start unit is configured to: after receiving a start signal, control the control switch in at least one of the plurality of battery clusters to close, to start a control unit corresponding to the at least one battery cluster; and
any one of the plurality of control units is configured to: detect, based on a state of the control switch in the corresponding battery cluster, whether a black start mode is on; and when the black start mode is on, control the DC-DC converter in the corresponding conversion unit to release electric energy stored in the battery pack in the corresponding battery cluster, to energize the direct current bus, wherein the black start mode is a mode in which power supply to the power grid needs to be restored after the power grid is powered off.