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KR-20260064772-A - A Fuelcell Hybrid System Control Method Capable of Monitoring Constantly

KR20260064772AKR 20260064772 AKR20260064772 AKR 20260064772AKR-20260064772-A

Abstract

The present invention relates to a method for controlling a fuel cell hybrid system, and more specifically, to a method for controlling a fuel cell hybrid system capable of continuous monitoring, which detects abnormal conditions by checking the power generation status of the fuel cell and the status of each component in real time, and thereby immediately stops the operation of the fuel cell and provides a notification, thereby preventing damage or accidents caused by abnormal operation of the fuel cell and enabling a rapid response.

Inventors

  • 바스넷버룬
  • 강석현
  • 강병주
  • 정보화
  • 김두희

Assignees

  • 테라릭스 주식회사

Dates

Publication Date
20260508
Application Date
20241029

Claims (9)

  1. A control method for a fuel cell hybrid system comprising: a hydrogen tank section for storing hydrogen to be supplied to a fuel cell; a stack section for producing electricity through the supply and reaction of hydrogen and air; an electrical section for supplying electricity produced in the stack section to a battery or load; and a control section for controlling the operation of the system. A fuel cell hybrid system control method characterized by including: a power generation monitoring step for monitoring the power generation status of a fuel cell; and an error status checking step for checking an error status of the fuel cell system during the power generation process and stopping the operation of the fuel cell.
  2. In claim 1, the error status checking step is A fuel cell hybrid system control method characterized by including a hydrogen leak verification step for verifying hydrogen leakage and a voltage error verification step for verifying abnormal voltage of the battery.
  3. In claim 1, the error status checking step is It includes a cooling error checking step to check whether the inlet and outlet temperatures of the cooling line are within a normal range, and The above cooling error verification step is, A fuel cell hybrid system control method characterized by including: an inlet temperature checking step for checking the stack inlet temperature of a cooling line and stopping the operation of the fuel cell if it exceeds a set temperature; an outlet temperature checking step for checking the stack outlet temperature of a cooling line and stopping the operation of the fuel cell if it exceeds a set range; an output information measuring step for measuring output information of the stack; a reference temperature setting step for setting a reference temperature according to the output of the stack; a stack temperature estimation step for estimating the stack temperature according to the difference between the stack inlet and outlet temperatures of the cooling line; a heat index calculation step for calculating a heat index according to the ratio of the estimated temperature to the reference temperature of the stack; and a heat grade notification step for calculating and notifying a heat grade according to the calculated heat index.
  4. In claim 3, the cooling error verification step is It includes a cooling function verification step for verifying whether the flow means for flowing the cooling fluid is operating normally, and The above cooling function verification step is, A fuel cell hybrid system control method characterized by including: a flow rate adjustment step for adjusting the flow rate of a cooling fluid according to a heat generation index; a temperature change calculation step for calculating the degree of change in the stack outlet temperature according to the flow rate adjustment; a cooling index calculation step for calculating a cooling index representing the ratio of the degree of temperature change to the degree of flow rate adjustment; and a cooling abnormality notification step for stopping the operation of the fuel cell and notifying thereof when the cooling index falls below a set value, by determining that there is a functional abnormality of the cooling line.
  5. In claim 1, the error status checking step is A fuel cell hybrid system control method characterized by including a tank pressure checking step for checking whether the remaining amount of hydrogen is less than a set value by checking the pressure of the hydrogen tank, and a supply pressure checking step for checking whether the hydrogen supply pressure is within a normal range.
  6. In claim 1, the stack error checking step is It includes a purge verification step to check whether the purge valve is operating normally, and The above fuzzy verification step is, A fuel cell hybrid system control method characterized by including: a setting information loading step for retrieving setting information regarding a purging time of a fixed period through a hydrogen purging valve; a pressure change calculation step for calculating the degree of pressure change of a hydrogen line due to purging execution; a voltage change calculation step for calculating the degree of voltage change of a stack due to purging execution; an output information loading step for retrieving output information of a stack; a change standard setting step for setting standards for pressure and voltage changes according to output; and a purging error detection step for stopping the operation of a fuel cell by determining that there is an error in the purging operation when the pressure or voltage deviates from a certain range from the change standard.
  7. In claim 1, the error status checking step is It includes a stack error checking step to check for abnormal states of the stack, and The above stack error checking step is, A fuel cell hybrid system control method characterized by including an overcurrent verification step for stopping the operation of a fuel cell when the overcurrent of the stack exceeds a set value, an open-circuit voltage verification step for checking the open-circuit voltage state of the stack, an emergency stop step for stopping the operation of the fuel cell when the maintenance time of the open-circuit voltage state exceeds a set time, and a low-voltage verification step for stopping the operation of the fuel cell by detecting a state in which the stack drops below a set voltage.
  8. In claim 1, the error status checking step is It includes an air error checking step to check for abnormal conditions in the air line, and The above air error verification step is, A fuel cell hybrid system control method characterized by including a temperature monitoring step for monitoring the temperature of an air line, a temperature range setting step for setting an appropriate temperature range of the air line, an external temperature reflection step for reflecting the external ambient temperature into the appropriate temperature range, and a temperature risk recognition step for determining a dangerous state when the temperature of the air line deviates from the set appropriate temperature range, stopping the operation of the fuel cell, and generating a warning signal.
  9. In claim 1, the error status checking step is It includes a ventilation error checking step for checking operation errors of a ventilation fan that performs ventilation of the system, and The above ventilation error verification step is, A fuel cell hybrid system control method characterized by including: an operation status verification step for checking whether the ventilation fan is operating based on whether power is supplied to the ventilation fan; a rotational speed measurement step for measuring the rotational speed of the ventilation fan; a speed range setting step for setting an appropriate speed range for the ventilation fan; and a ventilation abnormality detection step for stopping the operation of the fuel cell and notifying thereof when power is not supplied to the ventilation fan or the rotational speed of the ventilation fan deviates from the set speed range, thereby determining that the ventilation fan is operating abnormally.

Description

A Fuelcell Hybrid System Control Method Capable of Constantly Monitoring The present invention relates to a method for controlling a fuel cell hybrid system, and more specifically, to a method for controlling a fuel cell hybrid system capable of continuous monitoring, which detects abnormal conditions by checking the power generation status of the fuel cell and the status of each component in real time, and thereby immediately stops the operation of the fuel cell and provides a notification, thereby preventing damage or accidents caused by abnormal operation of the fuel cell and enabling a rapid response. A fuel cell is an energy conversion device that converts the chemical energy contained in fuel into electrical energy through an electrochemical reaction. It can be used not only to supply power for industrial, residential, and automotive use, but also to power small electrical and electronic products and portable devices. A fuel cell hybrid system can be formed in a vehicle, etc., as described in the patent document below, and most generally, it may be composed of a hydrogen tank section for supplying hydrogen, a stack section for generating electricity, an electrical section for converting the generated electricity or connecting it to a load in conjunction with a battery, and a control section for controlling the system, so that the power generated by the fuel cell is directly supplied to the load or stored in the battery. Furthermore, as fuel cells generate electricity through the supply and reaction of hydrogen and air, they are sensitive to the state of hydrogen and air, temperature, and pressure; if these conditions deviate from the appropriate range, it can cause serious damage to the fuel cell, as well as fires and accidents. Therefore, maintaining the proper state of the fuel cell system is of the utmost importance, and abnormal operation during operation poses a risk of causing a major accident due to the nature of fuel cells. (Patent Document) Registered Patent Publication No. 10-1047406 (Registered July 1, 2011) "Powernet System for Hybrid Vehicle and Control Method Thereof" FIG. 1 is a block diagram showing an example of the configuration of a fuel cell hybrid system. FIG. 2 is a configuration diagram showing an example of a hydrogen tank section. FIG. 3 is a flowchart illustrating a fuel cell hybrid system control method capable of continuous monitoring according to an embodiment of the present invention. Figure 4 is a flowchart showing the cooling error verification step. Figure 5 is a flowchart showing the cooling function verification step. Figure 6 is a flowchart showing the fuzzy verification step. Figure 7 is a flowchart showing the stack error checking step. Figure 8 is a flowchart showing the air error verification step. Figure 9 is a flowchart showing the ventilation error verification step. FIG. 10 is a flowchart illustrating a fuel cell hybrid system control method capable of continuous monitoring according to another embodiment of the present invention. FIG. 11 is a flowchart showing an example of FIG. 10 FIG. 12 is a flowchart showing the operation start phase. Figure 13 is a flowchart showing the hydrogen tank verification step. FIG. 14 is a flowchart showing the stack verification step. Figure 15 is a flowchart showing the hydrogen line verification step. Figure 16 is a flowchart showing the appropriate pressure setting step. FIG. 17 is a flowchart showing the fuzzy operation verification step. Figure 18 is a flowchart showing the cooling line verification step. Figure 19 is a flowchart showing the air line verification step. FIG. 20 is a flowchart showing the stack verification step. FIG. 21 is a flowchart showing the electrical part verification step. Hereinafter, preferred embodiments of a fuel cell hybrid system control method capable of continuous monitoring according to the present invention will be described in detail with reference to the attached drawings. In describing the present invention below, if it is determined that a detailed description of known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description will be omitted. Throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Furthermore, terms such as "...part," "...module," etc., described in the specification refer to a unit that processes at least one function or operation, and this may be implemented in hardware, software, or a combination of hardware and software. A method for controlling a fuel cell hybrid system capable of continuous monitoring according to one embodiment of the present invention is described with reference to FIGS. 1 to 9. The method for controlling a fuel cell hybrid system includes a power generation monitoring step (S5) for monitoring the power generation status