Patent ID: 11909217
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 12:
13. An energy storage system, wherein the energy storage system comprises M cell strings, N direct current/alternating current DC/DC power conversion devices, and at least one DC/AC power conversion device, a first end of any one of the N DC/DC power conversion devices is coupled to at least one of the M cell strings, a second end of the any DC/DC power conversion device is coupled to a first end of one of the at least one DC/AC power conversion device, a second end of the DC/AC power conversion device is configured to connect to a power grid, and M and N are integers greater than 0, and M≥N;
a first end of a first DC/DC power conversion device is coupled to Q cell strings in the M cell strings, the first DC/DC power conversion device comprises at least one DC/DC conversion unit, the first DC/DC power conversion device is any one of the N DC/DC power conversion devices, Q is an integer greater than 0, and Q≤M;
a first DC/DC conversion unit is coupled to at least one of the Q cell strings using the first end of the first DC/DC power conversion device, the first DC/DC conversion unit is coupled to a first end of one of the at least one DC/AC power conversion device using a second end of the first DC/DC power conversion device, and the first DC/DC conversion unit is any one of the at least one DC/DC conversion unit; and
the first DC/DC conversion unit is configured to perform adaptation between a voltage of one of the at least one DC/AC power conversion device and a voltage of at least one of the Q cell strings.