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

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