Method and apparatus for controlling energy storage system

An apparatus for controlling an energy storage system, wherein the energy storage system comprises an electric cabinet, and the apparatus comprises:

• a selection unit, configured to select a plurality of target modules from all modules contained in the electric cabinet, wherein a voltage of each of the plurality of target modules is greater than or equal to a voltage of a remaining module;
• and
• a control unit, configured to control a DC-DC circuit of the plurality of target modules to increase an output voltage,
• wherein the selection unit comprises:
• a calculation subunit, configured to calculate a first quantity according to a quantity of all modules contained in the electric cabinet, a current consumed by a controller area network (CAN) transceiver of a cell supervision circuit (CSC) of each module, a maximum power generation current of the CSC of each module, and a current of a slave battery management unit (SBMU);
• a first determining subunit, configured to determine, in a case that the first quantity is less than a preset quantity threshold, that a quantity of the selected target modules is the preset quantity threshold;
• and
• a second determining subunit, configured to determine, in a case that the first quantity is greater than or equal to a preset quantity threshold, that a quantity of the selected target modules is the first quantity.

An energy storage system, wherein the energy storage system comprises an electric cabinet, and the electric cabinet comprises:

• a slave battery management unit (SBMU);
• and
• a plurality of modules, each of the plurality of modules being connected to the SBMU, wherein
• each of the plurality of modules comprises a cell supervision circuit (CSC), and each CSC comprises:
• a DC-DC circuit;
• a low-dropout linear regulator;
• and
• an internal circuit,
• wherein a plurality of target modules are selected from the plurality of modules and a DC-DC circuit of the plurality of target modules is controlled to increase an output voltage, wherein a voltage of each of the plurality of target modules is greater than or equal to a voltage of a remaining module, and
• wherein the plurality of target modules are selected by:
• calculating a first quantity according to a quantity of all modules contained in the electric cabinet, a current consumed by a controller area network (CAN) transceiver of the cell supervision circuit (CSC) of each module, a maximum power generation current of the CSC of each module, and a current of the slave battery management unit (SBMU);
• and
• determining, in a case that the first quantity is less than a preset quantity threshold, that a quantity of the selected target modules is the preset quantity threshold;
• or
• determining, in a case that the first quantity is greater than or equal to a preset quantity threshold, that a quantity of the selected target modules is the first quantity.