WO2012034671A2 - Procédé pour faire fonctionner un véhicule à moteur - Google Patents

Procédé pour faire fonctionner un véhicule à moteur Download PDF

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Publication number
WO2012034671A2
WO2012034671A2 PCT/EP2011/004544 EP2011004544W WO2012034671A2 WO 2012034671 A2 WO2012034671 A2 WO 2012034671A2 EP 2011004544 W EP2011004544 W EP 2011004544W WO 2012034671 A2 WO2012034671 A2 WO 2012034671A2
Authority
WO
WIPO (PCT)
Prior art keywords
signal
voltage
electrical system
loop
motor vehicle
Prior art date
Application number
PCT/EP2011/004544
Other languages
German (de)
English (en)
Other versions
WO2012034671A3 (fr
Inventor
Reinhard Hofmann
Original Assignee
Audi Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Audi Ag filed Critical Audi Ag
Publication of WO2012034671A2 publication Critical patent/WO2012034671A2/fr
Publication of WO2012034671A3 publication Critical patent/WO2012034671A3/fr

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Classifications

    • 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
    • B60L3/04—Cutting off the power supply under fault conditions
    • 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
    • B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
    • 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
    • B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes

Definitions

  • the invention relates to a method for operating a motor vehicle with a high-voltage source according to the preamble of patent claim 1.
  • Electric or hybrid electric vehicles require powerful, high-capacity, high-voltage power supplies to power the electric powertrain of the motor vehicle.
  • high voltage is meant a voltage of at least 60V. Such voltages pose a health risk when touched by operators or maintenance personnel. Electric or hybrid vehicles therefore require additional safety measures that can prevent unwanted contact with live parts of the high-voltage on-board electrical system.
  • a signal loop which connects all components of the high voltage electrical system.
  • a signal loop also known as a high-voltage interlock loop (HVIL)
  • HVIL high-voltage interlock loop
  • the presence of a signal fed into the signal loop is monitored by means of a suitable measuring device. If the signal is no longer present, this is interpreted as an indication of a malfunction of a component of the electrical system.
  • the high-voltage source is disconnected from the high-voltage on-board electrical system by means of a contactor.
  • short circuits from the positive or negative potential of the high-voltage on-board electrical system to ground or to a low-voltage on-board electrical system can be detected here. Even physical interruptions such as cable breaks, fallen plugs or the like are detectable.
  • a motor vehicle with such a signal loop is known for example from US Pat. No. 7,586,722 B2.
  • the signal used there is a DC voltage of 12V, whose failure is considered indicative of a short circuit or other malfunction in a component of the high voltage electrical system, whereupon the high voltage source is disconnected from the electrical system.
  • Due to the spatial proximity of the signal loop to high-voltage components, such a motor vehicle may induce currents in the signal loop.
  • Such interference signals can lead to a functioning on-board network being erroneously regarded as faulty, which leads to an undesired shutdown of the motor vehicle.
  • the reverse error can also occur, so that disturbances in components of the high-voltage on-board electrical system are not recognized and therefore operating and service personnel are exposed to danger.
  • EP 2 043 418 A2 To avoid such interference signals, it is known from EP 2 043 418 A2 to use optical waveguides for the signal loop. Although this protects against the induction of currents, but is expensive and expensive. The additional necessary optical-electronic converter for transmitting the optical signal in the optical waveguide to other electronic components of the motor vehicle are also susceptible to interference itself.
  • a DC current of known current is fed into the signal loop and the presence of the DC signal detected as a voltage drop across a resistor.
  • the number of possible measuring devices in such a signal loop is therefore limited by the current source used. It is therefore often not possible to provide a separate measuring device for each component of the high voltage electrical system. If a fault occurs in the high-voltage on-board electrical system, it can not be assigned to a specific component with certainty. The provision of redundant measuring device is often not possible.
  • the present invention is therefore based on the object to provide a method according to the preamble of claim 1, which allows a cost-effective and trouble-free detection of malfunction in components of a high-voltage circuit of a motor vehicle.
  • a signal loop which connects all components of a high-voltage on-board electrical system is supplied with a digital signal.
  • a digital signal loop is much less prone to failure.
  • Interference signals interspersed by induction from the high-voltage electrical system can clearly be distinguished from the digital signal, so that a false shutdown of the high-voltage on-board electrical system or a falsely continuing operation of the high-voltage on-board network can be avoided in the event of a fault.
  • both interruptions of the signal loop and short circuits within the high-voltage on-board electrical system can be reliably detected.
  • the digital signal is provided in the form of a pulse width modulated signal.
  • a magnitude of the signal for example, the electrical voltage
  • the duty cycle - ie the width of the pulses of the signal - is varied.
  • Pulse width modulated signals are particularly easy to provide. Many common microcontrollers also used in motor vehicle construction already have the necessary facilities for generating such signals.
  • the presence of the signal is measured by an associated measuring device on each component of the high voltage electrical system.
  • an associated measuring device on each component of the high voltage electrical system.
  • failure information regarding the component is generated by the associated measuring device.
  • This failure information can for example be transmitted to a control unit and stored there in a memory, from which it can be read later by the service staff. This facilitates the diagnosis of malfunctions in the motor vehicle.
  • a time average of the voltage in the signal loop is measured by a further measuring device. The data determined by the further measuring device can be used to check the plausibility of the other measuring devices, so that, for example, a disconnection of the high-voltage source due to erroneous measured values can be prevented.
  • a high voltage electrical system for an electric or hybrid car includes a high voltage power source 12 for powering consumers 14, such as the electric power plant.
  • High voltage is to be understood as meaning voltages of more than 60 V, which represent a health risk when touched or even life-threatening.
  • the high-voltage source 12 is connected via a contactor 16 to the high-voltage electrical system. If maintenance work is to be carried out, the high-voltage on-board electrical system is switched off by opening the contactor 16.
  • the high-voltage on-board electrical system 10 can pose a danger, for example if a short circuit to ground or to the low-voltage on-board electrical system results from defects in one of the consumers 14. Even in the event of an accident rescue workers can be endangered by the high voltage in the electrical system 10.
  • a signal loop 18 is provided, the all consumers 14th of the high voltage electrical system 10 connects.
  • a control unit 20 integrated in the signal loop 18 feeds a digital signal, which is preferably coded by pulse width modulation, into the signal loop 18 and at the same time observes the fed-in signal.
  • the signal loop 18 is interrupted within this consumer 14, so that the fed-in signal can not run back to the control unit 20 again.
  • the control unit 20 sends a signal to the contactor 16, so that the high-voltage source 12 is separated by opening the contactor 16 from the high-voltage on-board electrical system 10.
  • the use of a digital, pulse width modulated signal protects against interference by currents that can be induced in the signal loop 18 due to the spatial proximity of the signal loop 18 to lines of the high voltage electrical system 10.
  • interference signals can be easily distinguished by the control device 20 from the input digital signals.
  • the high slew rate of digital signals which allows a simple differentiation of scattered interference signals, contributes to this.
  • a further measuring device can be integrated into the control device 20, by means of which a temporal mean value of the voltage present in the signal loop 18 is registered.
  • Such additional analog monitoring of the digital signal in the signal loop 18 can be used to check the plausibility of the digital monitoring, so that malfunctions in the digital circuits do not lead to a false shutdown of the high voltage on-board electrical system 10.
  • measuring devices 22 are provided which are each assigned to one of the consumers 14.
  • the measuring devices 22 are connected to the control device 20 via a data line 24, for example a vehicle bus. If there is an interruption of the signal loop 18 or a short circuit in one of the consumers 14, it can be determined by the measuring devices 22 which of the consumers 14 causes the malfunction. This information can be stored in the control device 20 and read out during a subsequent maintenance by the maintenance personnel become. This greatly simplifies troubleshooting the high-voltage electrical system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

L'invention concerne un procédé pour faire fonctionner un véhicule à moteur au moyen d'une source de haute tension (12) destinée à alimenter en électricité des composants (14) d'un réseau de bord à haute tension (10). Selon ce procédé, un signal est fourni à une boucle de signal (18) qui relie les composants (14) du réseau de bord à haute tension (10), la présence du signal étant détectée par au moins un dispositif de mesure (20) et, en l'absence de signal, la source de haute tension (12) étant isolée du réseau de bord à haute tension (10) par au moins un moyen d'isolement électrique (16). L'invention se caractérise en ce que le signal est un signal numérique. Un tel signal numérique se distingue nettement des signaux parasites analogiques qui peuvent être induits dans la boucle de signal (18) en raison de la proximité spatiale de la boucle de signal (18) vis-à-vis des éléments sous tension du réseau de bord haute tension (10). La sécurité de fonctionnement du véhicule à moteur peut ainsi être augmentée.
PCT/EP2011/004544 2010-09-18 2011-09-09 Procédé pour faire fonctionner un véhicule à moteur WO2012034671A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010045990 DE102010045990B4 (de) 2010-09-18 2010-09-18 Verfahren zum Betreiben eines Kraftwagens
DE102010045990.9 2010-09-18

Publications (2)

Publication Number Publication Date
WO2012034671A2 true WO2012034671A2 (fr) 2012-03-22
WO2012034671A3 WO2012034671A3 (fr) 2012-06-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/004544 WO2012034671A2 (fr) 2010-09-18 2011-09-09 Procédé pour faire fonctionner un véhicule à moteur

Country Status (2)

Country Link
DE (1) DE102010045990B4 (fr)
WO (1) WO2012034671A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013223706A1 (de) 2013-11-20 2015-05-21 Siemens Aktiengesellschaft Überwachen von Steckverbindungszuständen
DE102015205288A1 (de) * 2015-03-24 2016-09-29 Robert Bosch Gmbh Verfahren zum betreiben eines kraftfahrzeugs
DE102018130575A1 (de) 2018-11-30 2020-06-04 Valeo Siemens Eautomotive Germany Gmbh Überwachungsschaltung für ein Interlocksystem, Interlocksystem, Anordnung mit einem Interlocksystem und einer Funktionseinheit sowie Verfahren zum Betreiben eines Interlocksystems

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2043418A2 (fr) 2007-09-28 2009-04-01 Hitachi Ltd. Procédé et appareil pour réduire les émissions EMI dans un onduleur de puissance
US7586722B2 (en) 2007-09-18 2009-09-08 Ford Global Technologies, Llc High voltage interlock system and control strategy

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3409774B2 (ja) * 2000-05-09 2003-05-26 トヨタ自動車株式会社 車両、電源制御装置、車両の始動方法および高電圧電源の使用方法
DE10214877A1 (de) * 2002-04-04 2003-10-30 Zahnradfabrik Friedrichshafen Sicherheitssystem für einen elektrischen Antrieb
US7084361B1 (en) * 2005-09-22 2006-08-01 General Motors Corporation High voltage interlock switch
US8214120B2 (en) * 2007-11-04 2012-07-03 GM Global Technology Operations LLC Method to manage a high voltage system in a hybrid powertrain system
DE102008021542A1 (de) * 2008-03-01 2009-11-05 Continental Automotive Gmbh Verfahren und eine Vorrichtung zur Überwachung von Hochvoltverbindungen eines Hybridfahrzeugs

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7586722B2 (en) 2007-09-18 2009-09-08 Ford Global Technologies, Llc High voltage interlock system and control strategy
EP2043418A2 (fr) 2007-09-28 2009-04-01 Hitachi Ltd. Procédé et appareil pour réduire les émissions EMI dans un onduleur de puissance

Also Published As

Publication number Publication date
DE102010045990B4 (de) 2014-09-25
WO2012034671A3 (fr) 2012-06-14
DE102010045990A1 (de) 2012-03-22

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