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US 11,777,121 B2Granted
Power system, vehicle, vehicular power control method, and control method for power system
AssigneeHonda Motor Co., Ltd.
InventorsJunya Miyazaki, Nobutaka Nakajima, Kento Takeuchi, Kenji Taruya
Life of this patent
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Abstract
A power system comprises a fuel cell system having a fuel cell stack and a fuel cell water pump, a heat source having a heat source water pump and configured to be actuated to generate heat, a heat radiator for exchanging heat with the atmosphere, a cooling passage thermally connecting the fuel cell system, the heat source, and the heat radiator, and a controller for controlling the fuel cell system, the heat source, and the heat radiator, and the cooling passage.
Claims20
A power system, comprising:
- one or more fuel cell systems each having a fuel cell stack and a fuel cell water pump;
- a heat source having a heat source water pump and configured to be actuated to generate heat;
- a heat radiator for exchanging heat with an atmosphere;
- a cooling passage thermally connecting the one or more fuel cell systems, the heat source, and the heat radiator;
- and
- a controller for controlling the one or more fuel cell systems, the heat source, and the heat radiator, wherein
- the controller is configured to:
- control a rotation speed of the fuel cell water pump of each of the one or more fuel cell systems by switching between a rotation speed leading to a first discharge flow rate, which is a minimum discharge flow rate per a predefined unit time for the fuel cell water pump of each of the one or more fuel cell systems, and a rotation speed leading to a second discharge flow rate, which is greater than the first discharge flow rate;
- and
- control a rotation speed of the heat source water pump by switching between a rotation speed leading to a third discharge flow rate, which is a minimum discharge flow rate per a predefined unit time for the heat source water pump, and a rotation speed leading to a fourth discharge flow rate, which is greater than the third discharge flow rate;
- wherein
- the first discharge flow rate of the fuel cell water pump of each of the one or more fuel cell systems is less than the fourth discharge flow rate, and the second discharge flow rate of the fuel cell water pump of each of the one or more fuel cell systems is greater than the third discharge flow rate.
9 more elements
A power system, comprising:
- one or more fuel cell systems each having a fuel cell stack and a fuel cell water pump;
- a heat source having a heat source water pump and configured to be actuated to generate heat;
- a heat radiator for exchanging heat with an atmosphere;
- a cooling passage thermally connecting the fuel cell system, the heat source, and the heat radiator;
- and
- a controller for controlling the one or more fuel cell systems, the heat source, and the heat radiator wherein
- the controller is configured to:
- control a rotation speed of the fuel cell water pump of each of the one or more fuel cell systems according to a temperature of a corresponding one of the one or more fuel cell systems, within a range that does not go below a first minimum discharge flow rate per a predefined unit time,
- control, when the heat source is not being actuated, a rotation speed of the heat source water pump for each discharge flow rate per unit time of the fuel cell water pump of each of the one or more fuel cell systems, within a range that does not go below a second predefined minimum discharge flow rate,
- control, when the heat source is being actuated, a rotation speed of the heat source water pump according to a temperature of the heat source.
7 more elements
A control method for a power system, wherein the power system comprises:
- one or more fuel cell systems each having a fuel cell stack and a fuel cell water pump;
- a heat source having a heat source water pump and configured to be actuated to generate heat;
- a heat radiator for exchanging heat with an atmosphere;
- a cooling passage thermally connecting the one or more fuel cell systems, the heat source, and the heat radiator;
- and
- a controller for controlling the one or more fuel cell systems, the heat source, and the heat radiator;
- wherein
- the controller performs the steps of:
- controlling a rotation speed of the fuel cell water pump of each of the one or more fuel cell systems by switching between a rotation speed leading to a first discharge flow rate, which is a minimum discharge flow rate per a predefined unit time for the fuel cell water pump of each of the one or more fuel cell systems, and a rotation speed leading to a second discharge flow rate, which is greater than the first discharge flow rate;
- and
- controlling a rotation speed of the heat source water pump by switching between a rotation speed leading to a third discharge flow rate, which is a minimum discharge flow rate per a predefined unit time for the heat source water pump, and a rotation speed leading to a fourth discharge flow rate, which is greater than the third discharge flow rate;
- wherein
- the first discharge flow rate is less than the fourth discharge flow rate, and the second discharge flow rate is greater than the third discharge flow rate.
10 more elements
Dependencies are inferred from the claim text.