Patent ID: 11936227
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC H

Claim 9:
10. A power supply system comprising:
a battery string; and
a control device configured to control the battery string, wherein:
the battery string includes multiple battery circuit modules connected in series;
each of the battery circuit modules includes
a battery,
an output terminal that outputs a voltage of the battery,
a first switch connected to the output terminal and connected in parallel with the battery, and
a second switch connected in series with the battery;

each of the battery circuit modules is configured such that the voltage of the battery is applied to the output terminal when the first switch is in an electrically disconnected state and the second switch is in an electrically connected state;
the control device is configured to select one or more target batteries that match requested energy management from the batteries included in the battery string, and perform the requested energy management using the one or more target batteries with the batteries other than the one or more target batteries being disconnected from a circuit;
the control device is configured to perform a degradation diagnosis on each of the batteries included in the battery string using data continuously acquired during at least one of charging and discharging of the battery;
the control device is configured to determine whether power fluctuations in the requested energy management are acceptable for the degradation diagnosis; and
the control device is configured to exclude, from one or more candidate target batteries, one or more batteries that are being subjected to the degradation diagnosis among the batteries included in the battery string, when the control device determines that the power fluctuations in the requested energy management are not acceptable for the degradation diagnosis.