Fuel cell system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorJunichi MATSUO
Life of this patent
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Abstract
A control unit comprised in a fuel cell system is configured to perform prediction of whether a required output for a motor generator has a positive value and determination of whether a voltage of a fuel cell is less than a target voltage during execution of an auxiliary machine power consumption, and is configured to set a bypass valve to a first degree of opening during execution of the auxiliary machine power consumption when a result of at least one of the prediction and the determination is negative, and is configured to set the bypass valve to a second degree of opening less than the first degree of opening during execution of the auxiliary machine power consumption when results of both the prediction and the determination are positive.
Claims9
A fuel cell system comprising:
- a fuel cell;
- a secondary battery;
- a motor generator configured to charge the secondary battery with a regenerative power, the motor generator being driven with electric power from at least one of the fuel cell and the secondary battery;
- an air compressor configured to generate compressed air, the air compressor being driven with electric power from at least one of the fuel cell and the regenerative power;
- a supply passage configured to supply the compressed air to the fuel cell;
- a discharge passage configured to discharge the compressed air from the fuel cell;
- a bypass passage configured to connect the supply passage and the discharge passage;
- a bypass valve disposed in the bypass passage;
- and
- a control unit configured to perform auxiliary machine power consumption of supplying at least a part of the regenerative power to the air compressor upon satisfaction of a necessary condition that charging of the secondary battery is limited when the fuel cell does not generate electric power and the regenerative power is generated,
- wherein the control unit is configured to perform prediction of whether a required output for the motor generator has a positive value and determination of whether a voltage of the fuel cell is less than a target voltage during execution of the auxiliary machine power consumption,
- wherein the control unit is configured to set the bypass valve to a first degree of opening during execution of the auxiliary machine power consumption when a result of at least one of the prediction and the determination is negative, and
- wherein the control unit is configured to set the bypass valve to a second degree of opening less than the first degree of opening during execution of the auxiliary machine power consumption when results of both the prediction and the determination are positive.
Dependencies are inferred from the claim text.