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US 12,752,668 B2Granted
Fuel cell vehicle and controlling method thereof
AssigneesHyundai Motor Company, Kia Corporation
InventorsDong Kwan Lee, Seong Cheol Jeong
Life of this patent
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Abstract
A fuel cell vehicle includes: a fuel cell; a battery; and a controller that determines a load demanded output value. In particular, the controller determines whether a first condition related to overcharge of the battery and a second condition related to over-discharge of the battery are satisfied based on the load demanded output value, and further determines whether a constant output is operable based on an output efficiency of the fuel cell when the first and second conditions are satisfied. The controller controls an output of the fuel cell according to a result of the determination.
Claims17
A fuel cell vehicle, comprising:
- a fuel cell;
- a battery;
- and
- a controller configured to:
- determine a load demanded output value required by a load in the fuel cell vehicle;
- determine whether a first condition related to overcharge of the battery and a second condition related to over-discharge of the battery are satisfied based on the load demanded output value,
- determine whether constant output of the fuel cell is operable based on the load demanded output value and a current battery SOC (state of charge) when the first and second conditions are satisfied, and
- control an output of the fuel cell based on whether the constant output is operable,
- wherein the controller is configured to determine whether the constant output is operable based on further a comparison result between a constant output value and the load demanded output value,
- wherein the controller is configured to define a constant output operable region based on a difference between the load demanded output value and the constant output value, and one or more of a predetermined minimum SOC of the battery and a predetermined maximum SOC of the battery, and determine whether the constant output of the fuel cell is operable based on whether the load demanded output value and the current battery SOC are included within the constant output operable region,
- wherein, when the load demanded output value is less than the constant output value, the controller is configured to determine that the constant output is operable, based on the current battery SOC being less than or equal to a value obtained by subtracting an SOC corresponding to a value obtained by multiplying an amount exceeding the load demanded output value among the constant output value by a first constant from a predetermined maximum SOC of the battery, and
- wherein, when the load demanded output value is greater than or equal to the constant output value, the controller is configured to determine that the constant output is operable, based on the current battery SOC being greater than or equal to a value obtained by adding an SOC corresponding to a value obtained by multiplying an amount exceeding the constant output value among the load demanded output value by a second constant to a predetermined minimum SOC of the battery.
9 more elements
A method for controlling a fuel cell vehicle, the method comprising:
- determining a load demanded output value required for an entire load of the fuel cell vehicle;
- determining whether a first condition related to overcharge of a battery and a second condition related to over-discharge of the battery are satisfied based on the load demanded output value;
- determining whether constant output of a fuel cell is operable based on the load demanded output value and a current battery SOC (State of Charge) when the first condition and the second condition are satisfied;
- and
- controlling an output of the fuel cell in response to whether the constant output is operable, wherein determining whether the constant output of the fuel cell is operable includes defining a constant output operable region based on a difference between the load demanded output value and a constant output value, and one or more of a predetermined minimum SOC of the battery and a predetermined maximum SOC of the battery, and determining whether the constant output of the fuel cell is operable based on whether the load demanded output value and the current battery SOC are included within the constant output operable region,
- wherein, when the load demanded output value is less than the constant output value, determining that the constant output is operable, based on the current battery SOC being less than or equal to a value obtained by subtracting an SOC corresponding to a value obtained by multiplying an amount exceeding the load demanded output value among the constant output value by a first constant from a predetermined maximum SOC of the battery, and
- wherein, when the load demanded output value is greater than or equal to the constant output value, determining that the constant output is operable, based on the current battery SOC being greater than or equal to a value obtained by adding an SOC corresponding to a value obtained by multiplying an amount exceeding the constant output value among the load demanded output value by a second constant to a predetermined minimum SOC of the battery.
4 more elements
Dependencies are inferred from the claim text.