Patent ID: 11912388
Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 5:
6. A marine vessel comprising:
a marine vessel power supply system;
a propeller;
an electric motor to receive electric power supplied thereto from the marine vessel power supply system and to rotate the propeller; and
a hull to travel on water due to the rotation of the propeller; wherein
the marine vessel power supply system includes:
an inverter to supply electric power to the electric motor;
a battery to supply electric power to the inverter; and
an electronic control unit configured or programmed to control the inverter;

the inverter includes:
an inverter circuit to convert DC electric power supplied from the battery to AC electric power;
a voltage detector to detect a voltage in a wiring between the battery and the inverter circuit; and
a microcomputer configured or programmed to communicate with the electronic control unit and to control the inverter circuit according to a command supplied from the electronic control unit; and

the electronic control unit is configured or programmed to calculate an SOC estimate indicative of an estimated state-of-charge value of the battery based on a value of the voltage detected by the voltage detector and acquired from the microcomputer.