POWER STORAGE SYSTEM AND POWER STORAGE SYSTEM CONTROL METHOD

摘要

A system includes a first circuit in which storage battery units are connected in series, second circuits, adjusters that adjust the amounts of the currents flowing through the second circuits, and a controller that performs at least one of first control and second control. The first control is control in which the controller causes the adjusters to make the voltage of a first storage battery unit higher than the voltage of a second storage battery unit having a higher degree of degradation than the first storage battery unit by adjusting the amounts of the currents flowing through the second circuits and then stops a charge. The second control is control in which the controller causes the adjusters to make the voltage of the first storage battery unit lower than the voltage of the second storage battery unit by adjusting the amounts of the currents flowing through the second circuits and then stops a discharge.

主权项

1. A system comprising:
a first circuit in which storage battery units are connected in series; second circuits connected in parallel with the storage battery units; adjusters that adjust the amounts of the currents flowing through the second circuits; and a controller that performs at least one of first control and second control, the first control being control in which during a charge of the storage battery units through the first circuit, the controller causes the adjusters to make a voltage of a first storage battery unit of the storage battery units higher than a voltage of a second storage battery unit of the storage battery units by adjusting the amounts of the currents flowing through the second circuits, the second storage battery unit having a higher degree of degradation than the degree of degradation of the first storage battery unit, and then stops the charge, the second control being control in which during a discharge of the storage battery units through the first circuit, the controller causes the adjusters to make the voltage of the first storage battery unit lower than the voltage of the second storage battery unit by adjusting the amounts of the currents flowing through the second circuits, and then stops the discharge.