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

Claim 6:
7. 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 discharge current flowing from the power supply device to the load, a discharge current ratio that is a ratio of output currents of the plurality of power supply units, and a power loss of the power supply device;
acquiring a measured value of the discharge current flowing from the power supply device to the load;
obtaining, from the relationship information, the discharge current ratio at which the power loss of the power supply device corresponding to the acquired measured value of the discharge current flowing from the power supply device to the load is minimized;
adjusting a discharge current ratio set to the power supply device so as to match with the discharge 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.