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KR-102962113-B1 - FUEL CELL SYSTEM AND EMERGENCY DRIVING CONTROL METHOD THEREOF

KR102962113B1KR 102962113 B1KR102962113 B1KR 102962113B1KR-102962113-B1

Abstract

The present invention relates to a fuel cell system and a method for controlling emergency operation thereof. The system according to the present invention comprises: a communication unit that receives status data from thermal management control components; an event detection unit that detects an event of non-reception of status data from at least one thermal management control component; and a control unit that performs thermal management control of a fuel cell stack and electrical components based on the status data, and when the event of non-reception of status data is detected, performs emergency operation control according to an emergency measure defined in correspondence with the thermal management control component.

Inventors

  • 원종보
  • 최성경

Assignees

  • 현대자동차주식회사
  • 기아 주식회사

Dates

Publication Date
20260512
Application Date
20210804

Claims (19)

  1. A communication unit that receives status data from thermal management control components; An event detection unit that detects an event of non-reception of status data from at least one thermal management control component; and A control unit that performs thermal management control of a fuel cell stack and electrical components based on the above status data, and performs emergency operation control according to an emergency measure defined in response to the corresponding thermal management control component when an event of non-reception of the above status data is detected; Includes, A first pump positioned on a first cooling line through which a first cooling water circulates via a fuel cell stack; A second pump positioned on a second cooling line through which a second coolant circulates via electrical components; and It includes a cooling fan that blows outside air to a radiator disposed on the first cooling line and the second cooling line, and The above control unit is, A fuel cell system characterized by determining the target cooling performance of the fuel cell stack according to the power and efficiency of the fuel cell stack, and determining the rotational speed of the first pump and the cooling fan based on the determined target cooling performance of the fuel cell stack, the ambient temperature, and the cooling water temperatures at the inlet and outlet of the fuel cell stack.
  2. In claim 1, A fuel cell system further comprising a storage unit in which a control table is stored that defines state data corresponding to each of the above-mentioned thermal management control components, a condition for determining an event of non-reception of the state data, and an emergency action plan.
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  5. In claim 1, The above control unit is, A fuel cell system characterized by performing emergency operation control based on the maximum power of the fuel cell stack when an event of non-reception of status data regarding power information of the fuel cell stack is detected.
  6. In claim 1, The above control unit is, A fuel cell system characterized by performing emergency operation control for the first pump based on an arbitrarily set first value when an event of non-reception of status data regarding the coolant temperature of the fuel cell stack outlet is detected.
  7. In claim 1, The above control unit is, A fuel cell system characterized by performing emergency operation control for the cooling fan by controlling the stack-direction cooling water bypass valve and the stack-direction cooling water temperature control valve when an event of non-reception of status data regarding the cooling water temperature at the fuel cell stack inlet is detected.
  8. In claim 1, The above control unit is, A fuel cell system characterized by performing emergency operation control for the cooling fan based on previously received status data from an ambient temperature sensor or an arbitrarily set second value when an event of non-reception of status data regarding the ambient temperature is detected.
  9. In claim 1, The above control unit is, A fuel cell system characterized by determining the target cooling performance of the electrical component according to the power consumption and inefficiency of the electrical component, and determining the rotational speed of the second pump based on the determined target cooling performance of the electrical component and the ambient temperature.
  10. In claim 9, The above control unit is, A fuel cell system characterized by performing emergency operation control based on the low value of the fuel cell stack power, the maximum power of the fuel cell stack, and the maximum power consumption value of the corresponding electrical component when an event of non-reception of status data regarding the power consumption of the electrical component is detected.
  11. In claim 9, The above control unit is, A fuel cell system characterized by performing emergency operation control for the second pump based on previously received status data from an ambient temperature sensor or an arbitrarily set second value when an event of non-reception of status data regarding the ambient temperature is detected.
  12. A step of receiving status data from thermal management control components; A step of detecting an event of non-reception of status data from at least one thermal management control component; A step of performing thermal management control of a fuel cell stack and electrical components based on the above state data, and, when an event of non-reception of the above state data is detected, performing emergency operation control according to an emergency measure defined in response to the corresponding thermal management control component; A step of determining the target cooling performance of the fuel cell stack according to the power and efficiency of the fuel cell stack; and A method for emergency operation control of a fuel cell system characterized by including the step of determining the rotational speed of a first pump and a cooling fan based on the target cooling performance of the fuel cell stack determined above, the ambient temperature, and the cooling water temperatures at the inlet and outlet of the fuel cell stack.
  13. In claim 12, A method for emergency operation control of a fuel cell system, characterized by further including the step of storing a control table defined with state data corresponding to each of the thermal management control components, a condition for determining an event of non-reception of the state data, and an emergency action plan prior to the step of receiving the state data.
  14. In claim 12, A step of determining the target cooling performance of the electrical component according to the power consumption and inefficiency of the electrical component; and An emergency operation control method for a fuel cell system characterized by further including the step of determining the rotational speed of a second pump based on the target cooling performance of the electrical components determined above and the ambient temperature.
  15. In claim 14, The step of performing the above emergency driving control is, An emergency operation control method for a fuel cell system characterized by performing emergency operation control based on the maximum power of the fuel cell stack when an event of non-reception of status data regarding power information of the fuel cell stack is detected.
  16. In claim 14, The step of performing the above emergency driving control is, A method for emergency operation control of a fuel cell system, characterized by including the step of performing emergency operation control for the first pump based on an arbitrarily set first value when an event of non-reception of status data regarding the cooling water temperature of the fuel cell stack outlet is detected.
  17. In claim 14, The step of performing the above emergency driving control is, A method for emergency operation control of a fuel cell system, characterized by including the step of controlling a cooling fan by controlling a cooling water bypass valve toward the stack and a cooling water temperature control valve toward the stack radiator when an event of non-reception of status data regarding the cooling water temperature at the fuel cell stack inlet is detected.
  18. In claim 14, The step of performing the above emergency driving control is, A method for emergency operation control of a fuel cell system, characterized by including the step of performing emergency operation control of the cooling fan and the second pump based on previously received status data from an ambient temperature sensor or an arbitrarily set second value when an event of non-reception of status data regarding the ambient temperature is detected.
  19. In claim 14, The step of performing the above emergency driving control is, A method for emergency operation control of a fuel cell system, characterized by including the step of performing emergency operation control based on the low value of the fuel cell stack power, the maximum power of the fuel cell stack, and the maximum power consumption value of the said electrical component when an event of non-reception of status data regarding the power consumption of the electrical component is detected.

Description

Fuel Cell System and Emergency Driving Control Method Thereof The present invention relates to a fuel cell system and a method for controlling its emergency operation. Fuel cell systems can generate electrical energy using fuel cell stacks. For example, since the use of hydrogen as fuel in fuel cell stacks can serve as an alternative solution to global environmental problems, continuous research and development on fuel cell systems is being conducted. A fuel cell system may include a fuel cell stack that generates electrical energy, a fuel supply device that supplies fuel (hydrogen) to the fuel cell stack, an air supply device that supplies oxygen from the air, which is an oxidant required for the electrochemical reaction in the fuel cell stack, and a thermal management system (TMS) that removes the reaction heat of the fuel cell stack to the outside of the system, controls the operating temperature of the fuel cell stack, and performs water management functions. A thermal management system is a type of cooling device that maintains an appropriate temperature (e.g., 60–70°C) by circulating antifreeze, which acts as a coolant, to a fuel cell stack. It may include a TMS line through which the coolant circulates, a reservoir in which the coolant is stored, a pump for circulating the coolant, an ion filter for removing ions contained in the coolant, and a radiator for releasing heat from the coolant to the outside. Additionally, the thermal management system may include a heater for heating the coolant and an air conditioning unit (e.g., a heating heater) that uses the coolant to heat and cool the interior of a device (e.g., a vehicle) containing a fuel cell system. The thermal management system can maintain an appropriate temperature for not only the fuel cell stack but also the vehicle's electrical components. The thermal management system receives status data from the control system and/or components, etc., via CAN communication, and performs thermal management control operations based on the received status data. However, if status data necessary for thermal management is not received from the control system or components, thermal management of the fuel cell stack and/or electrical components becomes impossible. Consequently, if thermal management of the fuel cell system becomes impossible, the output of the fuel cell system may be limited, potentially leading to a dangerous situation. FIG. 1 is a drawing illustrating a fuel cell system according to one embodiment of the present invention. FIGS. 2a and 2b are drawings illustrating the first cooling water flow of a fuel cell system according to one embodiment of the present invention. FIG. 3 is a drawing illustrating a fuel cell system according to another embodiment of the present invention. FIG. 4 is a drawing illustrating a fuel cell system according to another embodiment of the present invention. FIGS. 5A and FIGS. 5B are drawings illustrating a first pipe and a second pipe according to various embodiments. FIG. 6 is a control block diagram of a fuel cell system according to one embodiment of the present invention. FIGS. 7 and 8 are drawings illustrating embodiments referenced to explain the emergency operation control operation of a fuel cell system according to one embodiment of the present invention. FIGS. 9 and FIGS. 10 are drawings illustrating the operation flow of an emergency operation control method for a fuel cell system according to an embodiment of the present invention. Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted. In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by such terms. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. FIGS. 1 to 4 illustrate fuel cell systems according to various embodiments, FIG. 1 is a