KR101826992B1 - Power system of fuel cell vehicle - Google Patents

Power system of fuel cell vehicle Download PDF

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KR101826992B1
KR101826992B1 KR1020110106289A KR20110106289A KR101826992B1 KR 101826992 B1 KR101826992 B1 KR 101826992B1 KR 1020110106289 A KR1020110106289 A KR 1020110106289A KR 20110106289 A KR20110106289 A KR 20110106289A KR 101826992 B1 KR101826992 B1 KR 101826992B1
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South Korea
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chopper
braking resistor
fuel cell
supercapacitor
voltage
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KR1020110106289A
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Korean (ko)
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KR20130042149A (en
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김성도
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현대자동차주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/22—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed with sequential operation of interdependent switches, e.g. relays, contactors, programme drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0038—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
    • B60L50/71—Arrangement of fuel cells within vehicles specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/50—Charging stations characterised by energy-storage or power-generation means
    • B60L53/54—Fuel cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B60L2210/14—Boost converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Fuel Cell (AREA)

Abstract

본 발명은 초퍼, 제동저항 및 주행 시에 상기 수퍼커패시터의 과전압 방지를 위해 상기 초퍼 및 내부의 전류흐름을 제어하는 제어기를 구비한 연료전지 차량의 전원시스템에 관한 것으로, 상기 연료전지 차량의 전원시스템은, 일단이 연료전지 및 구동모터와 연결된 파워라인과 상기 제동저항의 일단이 연결된 제1 접점과 연결되고, 타단이 상기 상기 수퍼커패시터의 일단과 연결되는 연결릴레이; 상기 제1 접점과 상기 제동저항의 일단 사이의 라인에 배치된 제동저항 전류센서;를 포함하고, 상기 초퍼는 컬렉터단이 상기 제동저항의 타단과 연결되고, 에미터단이 상기 수퍼커패시터의 타단과 연결되며, 상기 제어기는 주행 시에 상기 제동저항 전류센서에 의해 감지된 전류값을 모니터링하여 초퍼가 단락된 것으로 판단한 경우 연결릴레이를 오프(OFF)하는 것을 특징으로 한다. 이에 의해 본 발명은 종래의 연료전지 차량의 전원시스템와 달리, 초퍼가 단락된 경우라도 수퍼커패시터와 제동저항의 연결이 원천적으로 차단되는 회로 구조를 가지고 있어 고전압 방전에 의한 위험을 줄일 수 있다. The present invention relates to a power system for a fuel cell vehicle having a chopper, a braking resistor, and a controller for controlling current flow inside the chopper to prevent overvoltage of the supercapacitor during driving, A connection relay having one end connected to a power line connected to the fuel cell and the driving motor and a first contact connected to one end of the braking resistor and the other end connected to one end of the supercapacitor; And a braking resistor current sensor disposed on a line between the first contact and one end of the braking resistor, wherein the chopper has a collector terminal connected to the other end of the braking resistor, and an emitter terminal connected to the other end of the braking resistor And the controller monitors a current value sensed by the braking resistor current sensor at the time of traveling, and turns off the connection relay when it is determined that the chopper is short-circuited. Accordingly, unlike the power supply system of the conventional fuel cell vehicle, the present invention has a circuit structure in which the connection between the supercapacitor and the braking resistor is shut off, even when the chopper is short-circuited, so that the risk of high-voltage discharge can be reduced.

Description

연료전지 차량의 전원시스템{Power system of fuel cell vehicle}Technical Field [0001] The present invention relates to a power system of a fuel cell vehicle,

본 발명은 연료전지 차량의 전원시스템에 관한 것으로, 구체적으로는 주행시 회생제동과 관련한 수퍼커패시터의 과전압을 방지하기 위한 연료전지 차량의 전원시스템에 대한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power system of a fuel cell vehicle, and more particularly, to a power system of a fuel cell vehicle for preventing overvoltage of a supercapacitor associated with regenerative braking at the time of traveling.

종래의 연료전지 차량의 전원시스템(10)은, 도 1에 도시된 바와 같이, 연료전지(11), 연료전지(11) 및 회생제동시의 구동모터(13)에 의해 발생된 전압을 충전하기 위한 수퍼커패시터(14), 수퍼커패시터(14)의 과전압 방지를 위해 초퍼(15) 및 제동저항(16)으로 이루어질 수 있다.The power supply system 10 of the conventional fuel cell vehicle is configured to charge the voltage generated by the fuel cell 11, the fuel cell 11 and the regenerative drive motor 13, as shown in Fig. And a chopper 15 and a braking resistor 16 for preventing overvoltage of the supercapacitor 14 and the supercapacitor 14. [

종래의 연료전지 차량의 전원시스템(10)은 시동시 메모리를 검색하여 초퍼 단락오류코드가 없는 경우 정상시동으로 간주하여 수퍼커패시터 차단릴레이(18)를 온(ON) 하도록 동작 함으로써, 초퍼 단락시 수퍼커패시터(14)과 초퍼(15) 사이의 전류 누출을 방지할 수 있다.The power supply system 10 of the conventional fuel cell vehicle searches the memory at the time of starting and operates to turn on the supercapacitor blocking relay 18 in the absence of the chopper short circuit error code, The current leakage between the capacitor 14 and the chopper 15 can be prevented.

그러나, 종래의 연료전지 차량의 전원시스템(10)은, 차량의 운행 중 과전압/과전류에 의해 초퍼(15)가 절연파괴되고, 이로 인한 발열에 의해 수퍼커패시터 차단릴레이(15)도 파손되어 접점의 저항이 증가되어 소착된 경우, 지속적인 RC방전에 의한 발열에 의해 주위의 단품 및 와이어가 손상될 수 있다. 특히, 시동이 정지되어 냉각 불가능한 상태에서는 수퍼커패시터(14)에 저장된 에너지 방전으로 인한 발열의 피해는 더욱 심각한 문제를 야기할 수 있다.However, in the power supply system 10 of the conventional fuel cell vehicle, the chopper 15 is insulated and destroyed by the overvoltage / overcurrent during operation of the vehicle, and the supercapacitor blocking relay 15 is also broken by the heat generated thereby, If the resistance is increased, the surrounding product and wire may be damaged by heat generated by the continuous RC discharge. Particularly, in the state where the starting is stopped and the cooling is impossible, the damage caused by the heat discharge due to the energy discharge stored in the supercapacitor 14 may cause a more serious problem.

KR 10-2011-0053671 A 2011. 05. 24, 도면 1KR 10-2011-0053671 A 2011. 05. 24, drawing 1

본 발명의 목적은 초퍼의 단락 시에 발생하는 RC방전에 의한 부품의 손상을 최소화하도록 종래 적용된 수퍼커패시터 차단릴레이를 삭제한 회로구조를 가진 연료전지 차량의 전원시스템을 제공하는 것이다.SUMMARY OF THE INVENTION It is an object of the present invention to provide a power system of a fuel cell vehicle having a circuit structure in which a conventionally applied supercapacitor blocking relay is eliminated in order to minimize damage of a component caused by an RC discharge occurring in a short circuit of a chopper.

상기 목적을 달성하기 위한 본 발명은 연료전지의 전압 및 회생제동 시의 구동모터에 의해 발생된 전압을 충전하기 위한 수퍼커패시터와, 초퍼 및 제동저항과, 주행 시에 상기 수퍼커패시터의 과전압 방지를 위해 상기 초퍼 및 내부의 전류흐름을 제어하는 제어기를 구비한 연료전지 차량의 전원시스템에 관한 것으로, 본 연료전지 차량의 전원시스템은, 일단이 상기 연료전지 및 구동모터와 연결된 파워라인과 상기 제동저항의 일단이 연결된 제1 접점과 연결되고, 타단이 상기 상기 수퍼커패시터의 일단과 연결되는 연결릴레이; 상기 제1 접점과 상기 제동저항의 일단 사이의 라인에 배치된 제동저항 전류센서;를 포함하고, 상기 초퍼는 컬렉터단이 상기 제동저항의 타단과 연결되고, 에미터단이 상기 수퍼커패시터의 타단과 연결되며, 상기 제어기는 상기 주행 시에 상기 제동저항 전류센서에 의해 감지된 전류값을 모니터링하여 상기 초퍼가 단락된 것으로 판단한 경우 상기 연결릴레이를 오프(OFF)하는 것을 특징으로 한다.In order to accomplish the above object, the present invention provides a fuel cell system including a supercapacitor for charging a voltage generated by a fuel cell and a voltage generated by a drive motor during regenerative braking, a chopper and a braking resistor, And a controller for controlling current flow in the chopper and the power supply system of the fuel cell vehicle. The power system of the fuel cell vehicle includes a power line, one end of which is connected to the fuel cell and the drive motor, A connection relay connected to a first contact connected at one end and connected to one end of the supercapacer at the other end; And a braking resistor current sensor disposed on a line between the first contact and one end of the braking resistor, wherein the chopper has a collector terminal connected to the other end of the braking resistor, and an emitter terminal connected to the other end of the braking resistor And the controller monitors the current value sensed by the braking resistor current sensor at the time of driving to turn off the connection relay when the chopper is judged to be short-circuited.

상기 제어기는, 상위 제어기로부터 상기 초퍼의 오프(OFF) 명령이 수신되어 유지되는 상태에서 상기 모니터링된 전류값이 사전에 정해진 전류설정치를 초과한 상태로 일정시간 유지된 경우 상기 초퍼가 단락된 것으로 판단할 수 있다.Wherein the controller determines that the chopper is short-circuited when the monitored current value is maintained for a predetermined time in a state where the monitored current value exceeds a predetermined current setting value in a state where an OFF command of the chopper is received and maintained from the host controller can do.

본 연료전지 차량의 전원시스템은, 출력단이 상기 파워라인에 연결되고 입력단이 차량의 저전압배터리와 연결되는 부스트컨버터를 더 포함하고, 상기 제어기는, 차량의 시동 개시 시점으로부터 사전에 정해진 시동제한시간 까지 상기 부스트컨버터의 출력전압을 모니터링하여 사전에 정해진 시동전압값에 도달하는 것으로 판단한 경우 차량의 시동이 정상적으로 수행되도록 제어할 수 있다. 여기서 상기 제어기는, 차량의 시동 개시 시점으로부터 상기 시동제한시간 까지 상기 부스트컨버터의 출력전압이 사전에 정해진 시동전압값에 미 도달된 경우, 상기 미 도달된 전압값이 상기 제동저항에 걸리는 전압값에 대응하면 상기 초퍼가 단락된 것으로 판단할 수 있다.The power system of the fuel cell vehicle further includes a boost converter having an output end connected to the power line and an input end connected to a low voltage battery of the vehicle, If the output voltage of the boost converter is monitored and it is determined that the start voltage value reaches a predetermined start voltage value, it is possible to control the starting of the vehicle to be normally performed. Wherein when the output voltage of the boost converter has not reached a predetermined starting voltage value from a starting time point of the start of the vehicle to the starting time limit, the voltage value reached to the voltage value applied to the braking resistor It can be determined that the chopper is short-circuited.

본 연료전지 차량의 전원시스템은, 일단이 상기 연결릴레이의 타단과 상기 수퍼커패시터의 일단이 연결되는 제2 접점에 연결되고, 타단이 상기 제동저항의 타단과 상기 초퍼의 컬렉터단이 연결되는 제3 접점에 연결되는 초기충전릴레이를 더 포함하고, 상기 제어기는, 차량의 시동 시에 상기 초퍼가 단락되지 않은 것으로 판단한 경우, 상기 수퍼커패시터의 전압이 상기 연료전지의 전압에 도달할 때 까지 상기 연료전지로부터 생성된 전압이 상기 수퍼커패시터로 충전되도록 상기 초기충전릴레이를 온(ON) 하고 상기 연결릴레이를 오프(OFF) 할 수 있다.The power system of the present fuel cell vehicle is connected to a second contact, one end of which is connected to the other end of the connection relay and one end of the supercapacitor, and the other end of which is connected to the other end of the braking resistor, Further comprising an initial charge relay connected to the contact, wherein, when the chopper is determined not to be short-circuited at the start of the vehicle, the controller controls the fuel cell The initial charging relay may be turned on so that a voltage generated from the charging relay is charged by the supercapacitor, and the connection relay may be turned off.

상기 초퍼는 IGBT(Insulated Gate Bipolar Transistor) 소자로 구현될 수 있다. 또한 상기 제어기는 상기 구동모터를 구동하기 위한 모터제어유닛(Motor Control Unit)에 의해 구현될 수 있다. The chopper may be implemented as an IGBT (Insulated Gate Bipolar Transistor) device. The controller may be implemented by a motor control unit for driving the driving motor.

이와 같이, 본 발명에 따른 연료전지 차량의 전원시스템은 종래의 연료전지 차량의 전원시스템와 달리, 초퍼가 단락된 경우라도 수퍼커패시터와 제동저항의 연결이 원천적으로 차단되는 회로 구조를 가지고 있어 고전압 방전에 의한 위험을 줄임으로써 고전압 안정성을 높일 수 있다.As described above, unlike the power supply system of the conventional fuel cell vehicle, the power supply system of the fuel cell vehicle according to the present invention has a circuit structure in which the connection between the supercapacitor and the braking resistor is intrinsically blocked even when the chopper is short- The high voltage stability can be improved by reducing the risk caused by.

또한, 본 발명에 따른 연료전지 차량의 전원시스템은 종래 연료전지 차량의 전원시스템에 적용되는 수퍼커패시터 차단릴레이를 생략하여 구성함으로써 회로 구성이 단순화되어 제조원가를 낮출 수 있고 및 고장의 진단 및 정비를 용이하게 수행할 수 있다.Further, the power supply system of the fuel cell vehicle according to the present invention may be constructed by omitting the supercapacitor blocking relay applied to the power system of the fuel cell vehicle in the prior art, thereby simplifying the circuit configuration, reducing the manufacturing cost, and facilitating diagnosis and maintenance .

또한, 본 발명에 따른 연료전지 차량의 전원시스템은 차량의 시동 시 부스트컨버터에 의해 고전압이 생성될 때, 초퍼가 단락된 경우에는 제동저항이 부스트컨버터로부터 공급된 전압의 저항부하로 작용하여 고전압 생성을 방해하기 때문에, 초퍼의 단락을 감지할 수 있을 뿐만 아니라 초퍼 단락시 차량의 시동이 온(ON)되는 것을 방지할 수 있다.Further, in the power supply system of the fuel cell vehicle according to the present invention, when the high voltage is generated by the boost converter at the start of the vehicle, when the chopper is short-circuited, the braking resistor acts as a resistance load of the voltage supplied from the boost converter, It is possible to detect a short circuit of the chopper and to prevent the start of the vehicle from being turned ON when the chopper is short-circuited.

도 1는 종래의 연료전지 차량의 전원시스템의 개략적인 회로도이다.
도 2는 본 발명의 일 실시예에 따른 연료전지 차량의 전원시스템의 개략적인 회로도이다.
도 3은 본 발명의 일 실시예에 따른 연료전지 차량의 전원시스템의 주행 시 동작을 설명하기 위한 제어절차도이다.
도 4는 본 발명의 일 실시예에 따른 연료전지 차량의 전원시스템이 시동 시 동작을 설명하기 위한 제어절차도이다.1 is a schematic circuit diagram of a power system of a conventional fuel cell vehicle.
2 is a schematic circuit diagram of a power supply system of a fuel cell vehicle according to an embodiment of the present invention.
3 is a control flow chart for explaining the operation of the power supply system of the fuel cell vehicle according to the embodiment of the present invention.
FIG. 4 is a control procedure diagram for explaining the operation of the power supply system of the fuel cell vehicle according to the first embodiment of the present invention.

이하 첨부된 도면을 참조하여 본 발명의 일 실시예에 따른 연료전지 차량의 전원시스템에 대해 설명한다. 도 2는 본 발명의 일 실시예에 따른 연료전지 차량의 전원시스템의 개략적인 회로도이다.Hereinafter, a power system of a fuel cell vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings. 2 is a schematic circuit diagram of a power supply system of a fuel cell vehicle according to an embodiment of the present invention.

도 2를 참조하면, 본 실시예에 따른 연료전지 차량의 전원시스템(100)은 연료전지(102), 회생제동 시의 구동모터(104)에 의해 발생된 전압을 충전하기 위한 수퍼커패시터(106), 초퍼(108)와 제동저항(110), 연결릴레이(112), 제동저항 전류센서(114), 차량에 시동전압을 공급하기 위한 부스트컨버터(116)와 저전압배터리(118), 초기충전릴레이(120), 주행 시에 수퍼커패시터(106)의 과전압 방지를 위해 내부의 전류흐름을 제어하는 제어기(130) 및 차량이 전반적인 제어를 담당하는 상위 제어기(140)로 이루어질 수 있다.2, the power supply system 100 of the fuel cell vehicle according to the present embodiment includes a fuel cell 102, a supercapacitor 106 for charging a voltage generated by the drive motor 104 during regenerative braking, The chopper 108 and the braking resistor 110, the connection relay 112, the braking resistor current sensor 114, the boost converter 116 and the low voltage battery 118 for supplying the start voltage to the vehicle, the initial charge relay A controller 130 for controlling an internal current flow to prevent an overvoltage of the supercapacitor 106 during driving, and an upper controller 140 for controlling the overall control of the vehicle.

연료전지(102)는 차량의 전력원으로서 도 2에 도시된 바와 같이 구동모터(104) 및 부스트컨버터(116)와 연결된 파워라인에 연결되어 수퍼커패시터(106)를 충전하기 위한 전원을 공급할 수 있다.The fuel cell 102 may be connected to a power line connected to the drive motor 104 and the boost converter 116 to supply power to charge the supercapacitor 106 as shown in Figure 2 as a power source of the vehicle .

구동모터(104)는 제어기(130)의 제어에 의해 동작하고, 파워 라인에 전기적으로 연결되어, 연료전지(102) 및 수퍼커패시터(106)에서 전원을 공급받아 차량을 구동하며, 회생제동 등을 통해서 발생된 전원을 수퍼커패시터(106)로 제공한다. 이와 같이 구동모터(104)는 차량 제동시 회생 제동을 하여 발전기로서 동작하여 전력을 발생시키며 이 발생 전력을 파워 라인으로 공급하는 것에 의해 수퍼커패시터(106)를 충전할 수 있다. 수퍼커패시터(106)는 연결릴레이(112)를 통해 파워 라인에 연결되며 초퍼(108)를 통해 제동저항(110)에 연결된다.The drive motor 104 is operated under the control of the controller 130 and is electrically connected to the power line to supply power to the fuel cell 102 and the supercapacitor 106 to drive the vehicle, And supplies the generated power to the supercapacitor 106. [ In this way, the drive motor 104 performs regenerative braking when the vehicle is braking, operates as a generator to generate electric power, and supplies the generated electric power to the power line to charge the supercapacitor 106. [ The supercapacitor 106 is connected to the power line through the connection relay 112 and to the braking resistor 110 via the chopper 108.

연결릴레이(112)는, 제어기(130)의 제어에 의해 동작하고, 일단이 연료전지(102), 구동모터(104) 및 부스트컨버터(116)와 연결된 파워라인에 연결되고, 제동저항(110)과도 연결될 수 있다. 즉 도 2에 도시된 바와 같이 연결릴레이(112)의 일단은 파워라인과 제동저항(110)의 일단이 연결된 제1 접점(152)에 연결된다.The connection relay 112 is operated under the control of the controller 130 and is connected to a power line whose one end is connected to the fuel cell 102, the drive motor 104 and the boost converter 116, . In other words, as shown in FIG. 2, one end of the connection relay 112 is connected to the first contact 152 connected to one end of the power line and the braking resistor 110.

연결릴레이(112)의 타단은 수퍼커패시터(106)의 일단과 연결된다. 이와 같이 연결릴레이(112)는 제어기(130)의 제어에 의해 파워라인과 수퍼커패시터(106) 사이의 전류의 흐름을 연결하거나 차단할 수 있다.The other end of the connection relay 112 is connected to one end of the supercapacitor 106. Thus, the connection relay 112 may connect or disconnect the flow of current between the power line and the supercapacitor 106 under the control of the controller 130.

초퍼(108)는, 도 2에 도시된 바와 같이, 컬렉터단이 제동저항(110)의 타단과 연결되어 제동저항(110)을 통해 파워라인과 연결되고, 에미터단이 수퍼커패시터(106)의 타단과 연결된다. 초퍼(108)는 게이트단으로 입력되는 제어기(130)의 제어신호에 의해 수퍼커패시터(106)의 과전압을 방지하도록 동작한다. 2, the chopper 108 is connected to the power line through the braking resistor 110 and is connected to the other end of the braking resistor 110. The emitter terminal of the chopper 108 is connected to the power line of the supercapacitor 106 It is connected to the stage. The chopper 108 operates to prevent the overvoltage of the supercapacitor 106 by the control signal of the controller 130 inputted to the gate terminal.

여기서, 초퍼(108)는 일반적으로 구동이 용이한 반도체 소자인 IGBT(Insulated Gate Bipolar Transistor) 소자로 구현될 수 있다.Here, the chopper 108 may be implemented as an IGBT (Insulated Gate Bipolar Transistor) device, which is generally a semiconductor device that is easily driven.

제동저항 전류센서(114)는 제1 접점(152)과 제동저항 전류센서(114) 사이에 배치되어 제1 접점(152)으로부터 분기되어 제동저항 전류센서(114)로 연결되는 분기라인에 흐르는 전류를 감지하여 제어기(130)로 전달한다.The braking resistor current sensor 114 is disposed between the first contact 152 and the braking resistor current sensor 114 and generates a current flowing in the branch line that branches from the first contact 152 and is connected to the braking resistor current sensor 114 And transmits it to the controller 130.

부스트컨버터(116)는 저전압배터리(118)와 연결되어 차량의 시동을 위한 시동 전압을 공급하기 위한 구성이다. 즉 도 2에 도시된 바와 같이 부스트컨버터(116)의 출력단은 파워라인과 연결되고 입력단은 저전압배터리(118)와 연결될 수 있다. 여기서 저전압배터리(118)는 12V 또는 24V용으로 마련될 수 있다.The boost converter 116 is connected to the low voltage battery 118 to supply a starting voltage for starting the vehicle. That is, the output terminal of the boost converter 116 may be connected to the power line and the input terminal may be connected to the low voltage battery 118, as shown in FIG. Where the low voltage battery 118 may be provided for 12V or 24V.

초기충전릴레이(120)는, 제어기(130)의 제어에 의해 동작하고, 일단이 연결릴레이(112)와 수퍼커패시터(106)의 사이로부터 분기된 라인에 의해 연결되고, 타단이 제동저항(110)과 초퍼(108)의 컬렉터단 사이에 연결된다.The initial charge relay 120 operates under the control of the controller 130 and is connected by a line branched from one end between the connection relay 112 and the supercapacitor 106 and the other end connected to the braking resistor 110, And the collector stage of the chopper 108.

즉 초기충전릴레이(120)의 일단은 연결릴레이(112)의 타단과 수퍼커패시터(106)의 일단의 사이에 배치된 제2 접점(154)에 연결되고, 타단은 제동저항(110)의 타단과 초퍼(108)의 컬렉터단의 사이에 배치된 제3 접점(156)에 연결된다. 이에 의해 초기충전릴레이(120)는 차량의 시동 시에 제어기(130)의 제어에 의해 연료전지(102)로부터 생성된 전압이 수퍼커패시터(106)로 충전되도록 개폐될 수 있다.One end of the initial charge relay 120 is connected to the second contact 154 disposed between the other end of the connection relay 112 and one end of the supercapacitor 106 and the other end is connected to the other end of the braking resistor 110 And a third contact 156 disposed between the collector ends of the chopper 108. Thereby, the initial charge relay 120 can be opened or closed so that the voltage generated from the fuel cell 102 is charged to the supercapacitor 106 under the control of the controller 130 at the start-up of the vehicle.

제어기(130)는 차량의 전반적인 동작과 다양한 차량정보를 수집하는 상위 제어기(140)와 연동하며, 상위 제어기(140)로부터 전달된 차량정보와 제동저항 전류센서(114)에 의해 감지되어 전달된 전류값을 이용하여 수퍼커패시터(106)의 과전압 방지를 위해 초퍼(108) 및 본 실시예에 따른 연료전지 차량의 전원시스템(100)의 내부 전류흐름을 제어한다. The controller 130 is interlocked with the host controller 140 that collects the overall operation of the vehicle and various vehicle information. The controller 130 receives the vehicle information transmitted from the host controller 140, the current sensed by the braking resistor current sensor 114, Value to control the internal current flow of the chopper 108 and the power system 100 of the fuel cell vehicle according to the present embodiment to prevent overvoltage of the supercapacitor 106. [

제어기(130)는 주행 시에 제동저항 전류센서(114)에 의해 감지된 전류값을 모니터링 함으로써 초퍼(108)의 단락여부를 판단할 수 있으며, 초퍼(108)가 단락된 것으로 판단한 경우 연결릴레이(112)를 오프(OFF) 한다.The controller 130 can determine whether the chopper 108 is short-circuited by monitoring the current value sensed by the braking resistance current sensor 114 at the time of traveling. If the chopper 108 is judged to be short-circuited, 112 are turned off.

이 동작에 대해서는 도 3을 참조하여 구체적으로 설명한다. 도 3은 본 발명의 일 실시예에 따른 연료전지 차량의 전원시스템(100)의 주행 시 초퍼의 동작을 설명하기 위한 제어절차도이다.This operation will be described in detail with reference to FIG. 3 is a control procedure diagram for explaining the operation of the chopper when the power supply system 100 of the fuel cell vehicle according to the embodiment of the present invention is running.

도 3에 나타난 제어기(130)의 제어동작은 상위제어기(130)로부터 초퍼(108)의 오프(OFF) 명령이 유지되는 것을 전제로 한다. The control operation of the controller 130 shown in FIG. 3 assumes that an off command of the chopper 108 is maintained from the host controller 130.

즉 제어기(130)는 초퍼(108)의 오프(OFF) 명령이 수신되어 유지되는 상태에서(S310), 제동저항 전류센서(114)로부터 모니터링된 전류값(Ic)이 사전에 정해진 전류설정치(A)를 초과한 상태로(SS320), 일정시간(B) 유지된 경우(S330), 초퍼(108)가 단락된 것으로 판단한다(S340).That is, the controller 130 determines whether the current value Ic monitored from the braking resistor current sensor 114 is greater than or equal to the predetermined current value A (S310) in a state where the OFF command of the chopper 108 is received and held (S330), it is determined that the chopper 108 is short-circuited (S340).

또한, 제어기(130)는 부스트컨버터(116)의 출력전압을 모니터링하여, 출력전압이 사전에 정해진 출력전압에 도달하는지 판단하여, 초퍼(108)의 단락여부와 차량의 정상시동 수행 여부를 결정한다.In addition, the controller 130 monitors the output voltage of the boost converter 116 to determine whether the output voltage reaches a predetermined output voltage, and determines whether the chopper 108 is short-circuited and whether the vehicle is normally started .

이 동작에 대해서는 도 4를 참조하여 구체적으로 설명한다. 도 4는 본 발명의 일 실시예에 따른 연료전지 차량의 전원시스템(100)의 시동 시의 동작을 설명하기 위한 제어절차도이다.This operation will be described in detail with reference to FIG. FIG. 4 is a control procedure diagram for explaining the operation of the power supply system 100 of the fuel cell vehicle according to the first embodiment of the present invention.

도 4를 참조하면, 제어기(130)는 차량의 시동 개시 시점으로부터 부스트컨버터(116)로부터 출력된 출력전압을 모니터링하여(S410), 차량의 시동 개시시점으로부터 사전에 정해진 시동제한시간(T) 까지 사전에 정해진 시동전압값(Va)에 도달하는 지 판단한다(S420).4, the controller 130 monitors the output voltage output from the boost converter 116 from the starting point of the vehicle (S410). The controller 130 monitors the output voltage from the starting point of the vehicle to the predetermined starting time limit T It is determined whether a predetermined starting voltage value Va has been reached (S420).

S420단계의 판단결과 시동제한시간(T) 동안 시동전압값(Va)에 도달된 것으로 판단한 경우 제어기(130)는 차량의 시동이 정상적으로 수행되도록 제어한다(S430). If it is determined in step S420 that the starting voltage value Va has been reached during the starting time limit T, the controller 130 controls the start of the vehicle to be normally performed in step S430.

S420단계의 판단결과 시동제한시간(T) 동안 시동전압값(Va)에 미 도달된 경우, 제어기(130)는 이 미 도달된 전압값이 제동저항(110)에 걸리는 전압값에 대응하는 지 판단하여 이 미 도달된 전압값이 제동저항(110)에 걸리는 전압값에 대응하는 것으로 판단하면 초퍼(108)가 단락된 것으로 판단한다(S440).If it is determined in step S420 that the starting voltage value Va has not been reached for the starting time limit T, the controller 130 determines whether the voltage value reached by the braking resistor 110 corresponds to the voltage value applied to the braking resistor 110 If it is determined that the voltage value reached by the braking resistor 110 corresponds to the voltage value applied to the braking resistor 110, it is determined that the chopper 108 is short-circuited (S440).

즉, 차량이 시동 시 부스트컨버터(116)에 의해 고전압이 생성될 때, 초퍼(108)가 단락된 경우에는 제동저항(110)이 부스트컨버터(116)로부터 공급된 전압의 저항부하로 작용하여 고전압 생성을 방해하기 때문에, 부스트컨버터(116)로부터 출력된 전압은 시동제한시간(T) 동안 시동전압값(Va)에 도달하지 못한다. That is, when the chopper 108 is short-circuited when a high voltage is generated by the boost converter 116 at the start of the vehicle, the braking resistor 110 acts as a resistance load of the voltage supplied from the boost converter 116, The voltage output from the boost converter 116 does not reach the starting voltage value Va during the startup time limit T. [

이에 의해 본 실시예에 따른 연료전지 차량의 전원시스템(100)은 초퍼(108)의 단락을 감지할 수 있을 뿐만 아니라 초퍼(108) 단락시 차량의 시동이 온(ON)되는 것을 방지할 수 있다.Accordingly, the power supply system 100 of the fuel cell vehicle according to the present embodiment can sense a short circuit of the chopper 108 and can prevent the start of the vehicle from being turned on when the chopper 108 is short-circuited .

또한, 제어기(130)는 차량의 시동 시에 초퍼(108)가 단락되지 않은 것으로 판단한 경우, 수퍼커패시터(106)의 전압이 연료전지(102)의 전압에 도달할 때까지 연료전지(102)로부터 생성된 전압이 수퍼커패시터(106)로 충전되도록 초기충전릴레이(120)를 온(ON) 하고 연결릴레이(112)를 오프(OFF) 한다.When the controller 130 determines that the chopper 108 is not short-circuited at the start of the vehicle, the controller 130 outputs the control signal to the fuel cell 102 until the voltage of the supercapacitor 106 reaches the voltage of the fuel cell 102 The initial charge relay 120 is turned on so that the generated voltage is charged to the supercapacitor 106 and the connection relay 112 is turned off.

이와 같이 본 실시예 따른 연료전지 차량의 전원시스템(100)은, 종래의 연료전지 차량의 전원시스템와 달리, 초퍼(108)가 단락된 경우라도 연결릴레이(112) 또는 초기충전릴레이(120)를 온(ON) 하지 않는 한 수퍼커패시터(106)와 제동저항(110)의 연결이 원천적으로 차단되는 회로 구조를 가지고 있어, 고전압 방전에 의한 위험을 줄임으로써 고전압 안정성을 높일 수 있다.The power supply system 100 of the fuel cell vehicle according to the present embodiment is different from the power supply system of the conventional fuel cell vehicle in that the connection relay 112 or the initial charge relay 120 is turned on even when the chopper 108 is short- The connection between the supercapacitor 106 and the braking resistor 110 is shut off as long as it is not turned on so that the risk of high voltage discharge can be reduced and the high voltage stability can be enhanced.

100: 연료전지 차량의 전원시스템 102: 연료전지
104: 구동모터 106: 수퍼커패시터
108: 초퍼 110: 제동저항
112: 연결릴레이 114: 제동저항 전류센서
116: 부스트컨버터 118: 저전압배터리
120: 초기충전릴레이 130: 제어기
140: 상위 제어기 152: 제1 접점
154: 제2 접점 156: 제3 접점100: Power system of fuel cell vehicle 102: Fuel cell
104: driving motor 106: supercapacitor
108: chopper 110: braking resistor
112: Connection relay 114: Braking resistor current sensor
116: Boost converter 118: Low voltage battery
120: initial charge relay 130: controller
140: host controller 152: first contact
154: second contact point 156: third contact point

Claims (7)

연료전지의 전압 및 회생제동 시의 구동모터에 의해 발생된 전압을 충전하기 위한 수퍼커패시터와, 초퍼 및 제동저항과, 주행 시에 상기 수퍼커패시터의 과전압 방지를 위해 상기 초퍼 및 내부의 전류흐름을 제어하는 제어기를 구비한 연료전지 차량의 전원시스템에 있어서,
일단이 상기 연료전지 및 구동모터와 연결된 파워라인과 상기 제동저항의 일단이 연결된 제1 접점과 연결되고, 타단이 상기 상기 수퍼커패시터의 일단과 연결되는 연결릴레이; 및
상기 제1 접점과 상기 제동저항의 일단 사이의 라인에 배치된 제동저항 전류센서;를 포함하고,
상기 초퍼는 컬렉터단이 상기 제동저항의 타단과 연결되고, 에미터단이 상기 수퍼커패시터의 타단과 연결되며,
상기 제어기는 상기 주행 시에 상기 제동저항 전류센서에 의해 감지된 전류값을 모니터링하여 상기 초퍼가 단락된 것으로 판단한 경우 상기 연결릴레이를 오프(OFF)하며,
일단이 상기 연결릴레이의 타단과 상기 수퍼커패시터의 일단이 연결되는 제2 접점에 연결되고, 타단이 상기 제동저항의 타단과 상기 초퍼의 컬렉터단이 연결되는 제3 접점에 연결되는 초기충전릴레이를 더 포함하고,
상기 초퍼가 단락된 경우라도 연결릴레이 또는 초기충전릴레이를 온(ON) 하지 않는 한 상기 수퍼커패시터와 제동저항의 연결이 원천적으로 차단되는 것을 특징으로 하는 연료전지 차량의 전원시스템.A chopper and a braking resistor for controlling the flow of current in the chopper and the chopper in order to prevent overvoltage of the supercapacitor at the time of traveling, a supercapacitor for charging the voltage of the fuel cell and a voltage generated by the drive motor at the time of regenerative braking, A power supply system for a fuel cell vehicle, comprising:
A connection relay having one end connected to a power line connected to the fuel cell and the driving motor and a first contact connected to one end of the braking resistor and the other end connected to one end of the supercapacitor; And
And a braking resistor current sensor disposed on a line between the first contact and one end of the braking resistor,
The chopper has a collector terminal connected to the other end of the braking resistor, an emitter terminal connected to the other end of the supercapacitor,
Wherein the controller monitors a current value sensed by the braking resistor current sensor at the time of driving to turn off the connection relay when it determines that the chopper is short-
An initial charge relay connected at one end to a second contact to which the other end of the connection relay and one end of the supercapacitor are connected and at the other end to a third contact to which the other end of the braking resistor and the collector end of the chopper are connected Including,
Wherein the connection between the supercapacitor and the braking resistor is essentially blocked unless the connection relay or the initial charge relay is turned on even when the chopper is short-circuited. 제1항에 있어서,
상기 제어기는, 상위 제어기로부터 상기 초퍼의 오프(OFF) 명령이 수신되어 유지되는 상태에서 상기 모니터링된 전류값이 사전에 정해진 전류설정치를 초과한 상태로 일정시간 유지된 경우 상기 초퍼가 단락된 것으로 판단하는 것을 특징으로 하는 연료전지 차량의 전원시스템.The method according to claim 1,
Wherein the controller determines that the chopper is short-circuited when the monitored current value is maintained for a predetermined time in a state where the monitored current value exceeds a predetermined current setting value in a state where an OFF command of the chopper is received and maintained from the host controller And the power supply system of the fuel cell vehicle. 제1항에 있어서,
출력단이 상기 파워라인에 연결되고 입력단이 차량의 저전압배터리와 연결되는 부스트컨버터를 더 포함하고,
상기 제어기는, 차량의 시동 개시 시점으로부터 사전에 정해진 시동제한시간 까지 상기 부스트컨버터의 출력전압을 모니터링하여 사전에 정해진 시동전압값에 도달하는 것으로 판단한 경우 차량의 시동이 정상적으로 수행되도록 제어하는 것을 특징으로 하는 연료전지 차량의 전원시스템.The method according to claim 1,
Further comprising a boost converter having an output end connected to the power line and an input end connected to a low voltage battery of the vehicle,
The controller monitors the output voltage of the boost converter from a start time point of the vehicle to a predetermined start time limit and controls the start of the vehicle to be normally performed when it is determined that the start voltage value reaches a predetermined start voltage value The power system of a fuel cell vehicle. 제3항에 있어서,
상기 제어기는, 차량의 시동 개시 시점으로부터 상기 시동제한시간 까지 상기 부스트컨버터의 출력전압이 사전에 정해진 시동전압값에 미 도달된 경우, 상기 미 도달된 전압값이 상기 제동저항에 걸리는 전압값에 대응하면 상기 초퍼가 단락된 것으로 판단하는 것을 특징으로 하는 연료전지 차량의 전원시스템.The method of claim 3,
When the output voltage of the boost converter from the starting time point of the start of the vehicle to the start-up time limit is not reached to a predetermined starting voltage value, the non-reached voltage value corresponds to the voltage value applied to the braking resistor The control unit determines that the chopper is short-circuited. 제1항에 있어서,
상기 제어기는, 차량의 시동 시에 상기 초퍼가 단락되지 않은 것으로 판단한 경우, 상기 수퍼커패시터의 전압이 상기 연료전지의 전압에 도달할 때 까지 상기 연료전지로부터 생성된 전압이 상기 수퍼커패시터로 충전되도록 상기 초기충전릴레이를 온(ON) 하고 상기 연결릴레이를 오프(OFF) 하는 것을 특징으로 하는 연료전지 차량의 전원시스템.The method according to claim 1,
Wherein the controller is configured to determine that the chopper is not short-circuited at the start of the vehicle, so that the voltage generated from the fuel cell is charged to the supercapacitor until the voltage of the supercapacitor reaches the voltage of the fuel cell Wherein the initial charge relay is turned on and the connection relay is turned off. 제1항에 있어서,
상기 초퍼는 IGBT(Insulated Gate Bipolar Transistor) 소자로 구현되는 것을 특징으로 하는 연료전지 차량의 전원시스템.The method according to claim 1,
Wherein the chopper is implemented as an IGBT (Insulated Gate Bipolar Transistor) device. 제1항에 있어서,
상기 제어기는 상기 구동모터를 구동하기 위한 모터제어유닛(Motor Control Unit)에 의해 구현되는 것을 특징으로 하는 연료전지 차량의 전원시스템.The method according to claim 1,
Wherein the controller is implemented by a motor control unit for driving the drive motor.
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KR101703590B1 (en) 2015-03-30 2017-02-07 현대자동차 주식회사 System and method for controlling emergency driving for fuel cell vehicle
CN105680705A (en) * 2016-03-29 2016-06-15 泰州优宾晶圆科技有限公司 Automobile rectifier
KR101977590B1 (en) * 2017-11-22 2019-05-13 현대오트론 주식회사 Apparatus for controlling electric power system of vehicle and method thereof
PL423774A1 (en) * 2017-12-07 2019-06-17 Vers Produkcja Spółka Z Ograniczoną Odpowiedzialnością Spółka Komandytowa Method and system for recovery of brake energy in vehicles with diesel drive
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