Patent ID: 11971768
Assignee: YAZAKI CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC G

Claim 7:
8. A power supply control method for controlling, using a computer, charging and discharging of a power supply device including a plurality of power supply units which are connected in parallel to a load and a power generation unit, the power supply control method comprising:
providing relationship information indicating a relationship among a charge current flowing from the power generation unit to the power supply device, a charge current ratio that is a ratio of input currents of the plurality of power supply units, and a power loss of the power supply device;
acquiring a measured value of the charge current flowing from the power generation unit to the power supply device;
obtaining, from the relationship information, the charge current ratio at which the power loss of the power supply device corresponding to the acquired measured value of the charge current flowing from the power generation unit to the power supply device is minimized; and
adjusting a charge current ratio set to the power supply device so as to match with the charge current ratio obtained from the relationship information;
estimates a battery state of at least one of secondary batteries included in the plurality of power supply units; and
updates the relationship information according to the estimated battery state.