Search

KR-20260064771-A - A Fuelcell Hybrid System Control Method Specialized for Safety Driving

KR20260064771AKR 20260064771 AKR20260064771 AKR 20260064771AKR-20260064771-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 specialized for safe operation that prevents damage or accidents caused by abnormal operation of the fuel cell by supplying power only to sensors before the operation of the fuel cell to check the status of each component of the fuel cell, starting the operation of the fuel cell only when the status of each component of the fuel cell is confirmed to be within a normal range, and continuously monitoring each component even during power generation.

Inventors

  • 바스넷버룬
  • 강석현
  • 강병주
  • 정보화
  • 김두희

Assignees

  • 테라릭스 주식회사

Dates

Publication Date
20260508
Application Date
20241029

Claims (11)

  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. An operation start step for starting the operation of a fuel cell according to the instructions of a control unit, and A hydrogen tank verification step for checking the status of the hydrogen tank section at the start of operation, and A stack verification step for verifying the condition of the stack section after verifying the hydrogen tank, and A component verification step for checking the status of the component after verifying the stack section, and 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.
  2. In claim 1, the operation initiation step is A fuel cell hybrid system control method characterized by including a sensor operation step for initiating the operation of sensors for measuring the state of each component of the system, and a device verification step for verifying the power-off state of devices for driving each component of the fuel cell.
  3. In claim 1, the hydrogen tank verification step is A fuel cell hybrid system control method characterized by comprising: an initial battery verification step for verifying the initial battery status; a tank valve operation step for opening the tank valve of the hydrogen tank section when battery conditions are satisfied; a high-pressure sensor verification step for verifying the remaining amount of hydrogen in the hydrogen tank section by measuring the pressure of hydrogen discharged from the hydrogen tank section by a high-pressure sensor and stopping the operation of the fuel cell if the pressure of the hydrogen tank section exceeds a set range; a regulator operation step for operating a regulator to lower the pressure of the hydrogen to a set range if the pressure of the hydrogen tank section is within a set range; and a medium-pressure sensor verification step for measuring the pressure of the hydrogen reduced by the operation of the regulator and stopping the operation of the fuel cell if it exceeds a set range.
  4. In claim 1, the stack part verification step is A fuel cell hybrid system control method characterized by including: a hydrogen line verification step for verifying the state of a hydrogen line formed within a stack portion and receiving hydrogen from a hydrogen tank portion; a cooling line verification step for verifying the state of a cooling line through which a cooling fluid flows to cool the stack portion; an air line verification step for verifying the state of an air line formed within a stack portion and supplying air for reaction with hydrogen; and a stack verification step for verifying the state of a stack that forms a space where power is produced by the reaction of hydrogen and air.
  5. In claim 4, the hydrogen line verification step is A fuel cell hybrid system control method characterized by including a hydrogen pressure checking step for checking whether the pressure of hydrogen delivered from the hydrogen tank section to the hydrogen line is within a set range, and an inlet valve opening step for opening a hydrogen inlet valve installed at the hydrogen line inlet only when the hydrogen pressure is within the set range.
  6. In claim 5, the hydrogen line verification step is It includes an appropriate pressure setting step for setting the appropriate pressure of hydrogen flowing into the hydrogen line, and The above appropriate pressure setting step is, A fuel cell hybrid system control method characterized by comprising: an environmental information collection step for collecting surrounding environmental information when the fuel cell is operating; a pressure information collection step for collecting information regarding the pressure of hydrogen flowing into a hydrogen line; a collection step for collecting information regarding the output of the fuel cell; a correlation analysis step for analyzing the correlation between environmental information, hydrogen pressure, and output using the collected and accumulated stored information; an environmental information input step for inputting environmental information around the fuel cell currently intended to operate into the analyzed correlation; and an optimal pressure determination step for determining the hydrogen pressure at which the output is maximized according to the input of environmental information.
  7. In claim 4, the hydrogen line verification step is It includes a purge operation verification step for verifying the operation of the purge valve in the hydrogen line, and The above fuzzy operation verification step is, A fuel cell hybrid system control method characterized by including: a purge valve operation step for operating a purge valve; a hydrogen pressure storage step for measuring and storing hydrogen pressure before and after the operation of the purge valve; a stack voltage storage step for measuring and storing the voltage of the stack before and after the operation of the purge valve; a rate of change calculation step for calculating the rate of change of hydrogen pressure and stack voltage before and after the operation of the purge valve; and a normal operation judgment step for stopping the operation of the fuel cell if the calculated rate of change deviates from a set range.
  8. In claim 4, the cooling line verification step is A fuel cell hybrid system control method characterized by comprising: an outlet temperature measurement step for measuring the outlet side temperature of a stack; a flow means operation step for initiating the operation of a flow means for flowing a cooling fluid; an operation intensity control step for adjusting the operation intensity of the flow means in stages and measuring the temperature of the stack outlet; a temperature change calculation step for calculating the degree of change of the stack outlet temperature according to the operation stage of the flow means; a change index calculation step for calculating a change index representing the degree of change of the outlet temperature over a set period of time; and a normal operation judgment step for stopping the operation of the fuel cell if the calculated change index does not fall within a set normal range.
  9. In claim 4, the air line verification step is A fuel cell hybrid system control method characterized by including a line temperature measurement step for measuring the temperature of an air line, a blower operation step for operating an air blower that supplies air to the air line, a temperature change calculation step for calculating the degree of temperature change of the air line for a certain period of time after operating the air blower, and a normal operation judgment step for determining whether the air blower is operating normally based on whether the calculated temperature change is within a set range.
  10. In claim 4, the stack verification step is A fuel cell hybrid system control method characterized by comprising: an open-circuit voltage measurement step for measuring the open-circuit voltage of a stack; a relay connection step for operating a load relay connecting the stack and the load to supply power to the load when the measured open-circuit voltage is within a set range; a current measurement step for measuring the current flowing to the load and stopping the operation of the fuel cell when the measured current exceeds a set range; a voltage measurement step for measuring the voltage of the stack simultaneously with the current measurement; and a current verification step for checking the current state reflecting the measured voltage to release the suspension of the fuel cell operation caused by electromagnetic noise.
  11. In claim 1, the electrical component verification step is A fuel cell hybrid system control method characterized by including: a battery voltage checking step for stopping the operation of the fuel cell if the voltage of the battery is outside a set range after checking the fuel cell status by the stack checking step above; a load current checking step for stopping the operation of the fuel cell if the current flowing through the load is outside a set range after checking the battery voltage; and a ventilation fan checking step for checking the operating status of the ventilation fan.

Description

A Fuelcell Hybrid System Control Method Specialized for Safety Driving A Fuelcell Hybrid System Control Method Specialized for Safety Driving 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 specialized for safe operation that prevents damage or accidents caused by abnormal operation of the fuel cell by supplying power only to sensors before the operation of the fuel cell to check the status of each component of the fuel cell, starting the operation of the fuel cell only when the status of each component of the fuel cell is confirmed to be within a normal range, and continuously monitoring each component even during power generation. 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, it is of utmost importance to maintain the proper state of the fuel cell system. In particular, if it operates outside the normal range at the start of operation, there is a risk of serious damage just from the start of operation, and abnormal operation during operation poses a risk of causing a major accident due to the characteristics of the fuel cell. (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 specialized for safe operation according to an embodiment of the present invention. FIG. 4 is a flowchart illustrating an example of FIG. 3. FIG. 5 is a flowchart showing the operation start phase. Figure 6 is a flowchart showing the hydrogen tank verification step. Figure 7 is a flowchart showing the stack verification step. Figure 8 is a flowchart showing the hydrogen line verification step. Figure 9 is a flowchart showing the appropriate pressure setting step. Figure 10 is a flowchart showing the fuzzy operation verification step. Figure 11 is a flowchart showing the cooling line verification step. Figure 12 is a flowchart showing the air line verification step. Figure 13 is a flowchart showing the stack verification step. Figure 14 is a flowchart showing the electrical part verification step. Figure 15 is a flowchart showing the error status check step. Figure 16 is a flowchart showing the cooling error checking step. Figure 17 is a flowchart showing the cooling function verification step. Figure 18 is a flowchart showing the fuzzy verification step. FIG. 19 is a flowchart showing the stack error checking step. FIG. 20 is a flowchart showing the air error verification step. FIG. 21 is a flowchart showing the ventilation error checking step. Hereinafter, preferred embodiments of a fuel cell hybrid system control method specialized for safe operation according to the present invention will be described in detail with reference to the accompanying 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 "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. A fuel cell hybrid system control method specialized for safe operation according to one embodiment of the present invention is described with reference to FIGS. 1 to 21. The fuel cell hybrid system control method comprises: an operation start step (S1) for starting the operation of a fuel cell according to instructions from a control unit; a hydrogen tank check step (S2) fo