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

Claim 5:
6. The energy storage system according to claim 5, wherein the first energy storage converter is configured to detect voltages of the Q cell strings, and when a voltage of any one of the Q cell strings is greater than or equal to a first voltage threshold, a switch connected in parallel to a DC/DC conversion unit coupled to the cell string whose voltage is greater than or equal to the first voltage threshold is closed; and
when a voltage of any one of the Q cell strings is less than or equal to a second voltage threshold, a switch connected in parallel to a DC/DC conversion unit connected to the cell string whose voltage is less than or equal to the second voltage threshold is open, wherein the first voltage threshold is greater than or equal to the second voltage threshold.