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AT506272B1 - METHOD FOR OPERATING AN ELECTRIC VEHICLE - Google Patents

METHOD FOR OPERATING AN ELECTRIC VEHICLE Download PDF

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Publication number
AT506272B1
AT506272B1 ATA525/2009A AT5252009A AT506272B1 AT 506272 B1 AT506272 B1 AT 506272B1 AT 5252009 A AT5252009 A AT 5252009A AT 506272 B1 AT506272 B1 AT 506272B1
Authority
AT
Austria
Prior art keywords
soc1
charge
state
generating device
electric vehicle
Prior art date
Application number
ATA525/2009A
Other languages
German (de)
Other versions
AT506272A3 (en
AT506272A2 (en
Inventor
Robert Dr Fischer
Original Assignee
Avl List Gmbh
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 Avl List Gmbh filed Critical Avl List Gmbh
Priority to ATA525/2009A priority Critical patent/AT506272B1/en
Publication of AT506272A2 publication Critical patent/AT506272A2/en
Priority to DE102010016188A priority patent/DE102010016188A1/en
Priority to CN201010159851.2A priority patent/CN101857023B/en
Publication of AT506272A3 publication Critical patent/AT506272A3/en
Application granted granted Critical
Publication of AT506272B1 publication Critical patent/AT506272B1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • 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
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/46—Series type
    • 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
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • 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
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid 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
    • 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
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
    • B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/60—Navigation input
    • B60L2240/62—Vehicle position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2552/00—Input parameters relating to infrastructure
    • B60W2552/20—Road profile, i.e. the change in elevation or curvature of a plurality of continuous road segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2556/00—Input parameters relating to data
    • B60W2556/10—Historical data
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2556/00—Input parameters relating to data
    • B60W2556/45—External transmission of data to or from the vehicle
    • B60W2556/50—External transmission of data to or from the vehicle of positioning data, e.g. GPS [Global Positioning System] data
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using 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
    • Y02T10/62—Hybrid 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
    • 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
    • Y02T10/72—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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electrochemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zum Betreiben eines Elektrofahrzeuges, welches zumindest eine elektrische Antriebsmaschine, zumindest einen elektrischen Energiespeicher, sowie zumindest eine Stromerzeugungseinrichtung aufweist, wobei die Stromerzeugungseinrichtung ab einem definierten Ladezustandes (SOC) des elektrischen Energiespeichers aktiviert wird. Um die Kosten des Elektrofahrzeuges zu verringern und Bauraum einzusparen ist vorgesehen, dass die Stromerzeugungseinrichtung für einen mittleren Leistungsbedarf der elektrischen Antriebsmaschine bei einer definierten Dauergeschwindigkeit des Elektrofahrzeuges in der Ebene ausgelegt wird und dass die Stromerzeugungseinrichtung noch vor Erreichen einer unteren technischen Betriebsgrenze des Ladezustandes des elektrischen Energiespeichers bei einem definierten Einschaltladezustand (SOC1) aktiviert wird, wobei der Einschaltladezustand (SOC1) in Bezug auf die untere technische Betriebsgrenze (SOC2) eine Energiereserve (R) des elektrischen Energiespeichers definiert, deren Größe so bemessen wird, dass in Anzahl, Größe und/oder Dauer definierte Spitzenleistungen, vorzugsweise Fahrzeugbeschleunigungen und/oder Steigungen abgedeckt werden können.The invention relates to a method for operating an electric vehicle, which has at least one electric drive machine, at least one electrical energy store, and at least one power generating device, wherein the power generating device is activated from a defined state of charge (SOC) of the electrical energy store. In order to reduce the cost of the electric vehicle and save space is provided that the power generating device is designed for a mean power demand of the electric drive machine at a defined continuous speed of the electric vehicle in the plane and that the power generation device even before reaching a lower technical operating limit of the state of charge of the electric energy storage is activated at a defined switch-on state of charge (SOC1), wherein the switch-on state of charge (SOC1) defines an energy reserve (R) of the electrical energy store with respect to the lower technical operating limit (SOC2) whose size is dimensioned such that in number, size and / or Duration defined peak performance, preferably vehicle accelerations and / or gradients can be covered.

Description

Beschreibung [0001] Die Erfindung betrifft ein Verfahren zum Betreiben eines Elektrofahrzeuges, welches zumindest eine elektrische Antriebsmaschine, zumindest einen elektrischen Energiespeicher, sowie zumindest eine Stromerzeugungseinrichtung aufweist, wobei die Stromerzeugungseinrichtung ab einem definierten Ladezustand des elektrischen Energiespeichers aktiviert wird, wobei die Stromerzeugungseinrichtung noch vor Erreichen einer unteren technischen Betriebsgrenze des Ladezustandes des elektrischen Energiespeichers bei einem definierten Einschaltladezustand aktiviert wird, wobei der Einschaltladezustand in Bezug auf die untere technische Betriebsgrenze eine Energiereserve des elektrischen Energiespeichers definiert, deren Größe so bemessen wird, dass in Anzahl, Größe und/oder Dauer definierte Spitzenleistungen, vorzugsweise Fahrzeugbeschleunigungen und/oder Steigungen abgedeckt werden können.The invention relates to a method for operating an electric vehicle, which has at least one electric drive machine, at least one electrical energy storage, and at least one power generating device, wherein the power generating device is activated from a defined state of charge of the electrical energy storage, the power generating device even before reaching a lower technical operating limit of the state of charge of the electrical energy storage is activated at a defined Einschaltladezustand, the Einschaltladezustand defined with respect to the lower technical operating limit an energy reserve of the electrical energy storage whose size is such that in number, size and / or duration defined peak powers , preferably vehicle accelerations and / or gradients can be covered.

[0002] Aus der EP 1 225 074 A2 ist ein Serienhybridfahrzeug mit einem Elektromotor, einem Generator und einer den Generator antreibenden Brennkraftmaschine bekannt. Dabei wird innerhalb einer Zero-Emission-Zone das Fahrzeug rein elektrisch bei deaktivierter Brennkraftmaschine betrieben. Dabei wird sowohl kurz vor dem Eintritt in die emissionsfreie Zone als auch beim Verlassen der emissionsfreien Zone der elektrische Energiespeicher durch die Brennkraftmaschine aufgeladen.From EP 1 225 074 A2 a series hybrid vehicle with an electric motor, a generator and a generator driving the internal combustion engine is known. In this case, the vehicle is operated purely electrically with deactivated internal combustion engine within a zero-emission zone. In this case, the electric energy storage is charged by the internal combustion engine both shortly before entering the emission-free zone and when leaving the emission-free zone.

[0003] Die WO 2005/082663 A1 offenbart ein tragbares Stromaggregat für Elektrofahrzeuge, welches dazu ausgebildet ist, um die Reichweite des Elektrofahrzeuges auszudehnen.WO 2005/082663 A1 discloses a portable power unit for electric vehicles, which is adapted to extend the range of the electric vehicle.

[0004] Aus der US 2009/015202 A ist ein Verfahren zur Laderegelung bei einem Hybridfahrzeug bekannt, wobei ein Sollladezustand als Mittelwert des Ladebereiches definiert wird. Der Energiefluss wird so geregelt, dass der Sollladezustand eingehalten wird. Durch Betreiben des elektrischen Antriebsmotors des Hybridfahrzeuges wird der Ladezustand von diesem Sollwert abgesenkt und durch Generieren von elektrischer Energie mit der Brennkraftmaschine wieder angehoben.From US 2009/015202 A, a method for charging control in a hybrid vehicle is known, wherein a desired state of charge is defined as the mean value of the charging area. The energy flow is controlled so that the nominal state of charge is maintained. By operating the electric drive motor of the hybrid vehicle, the state of charge is lowered from this desired value and raised again by generating electrical energy with the internal combustion engine.

[0005] Die WO 2008/128416 A1 offenbart ein Energiemanagement für Hybridfahrzeuge mit einem Lastvorhersagesystem, mit welchem aufgrund von Eingangsparametern und mittels eines selbstlernenden Systems ein künftiges Lastniveau berechnet wird, um aufgrund der Lastanforderung eine optimale zukünftige Ausgangsleistung, einen Batterieladezustand und eine optimale Fahrzeuggeschwindigkeit zu bestimmen. Aufgrund dieser optimalen zukünftigen Leistungsabschätzung wird die Brennkraftmaschine, der Generator und der elektrische Energiespeicher des Hybridfahrzeuges koordiniert.WO 2008/128416 A1 discloses an energy management for hybrid vehicles with a load prediction system, with which a future load level is calculated based on input parameters and by means of a self-learning system to optimal future output power, a battery state of charge and an optimal vehicle speed due to the load request determine. On the basis of this optimum future power estimation, the internal combustion engine, the generator and the electrical energy store of the hybrid vehicle are coordinated.

[0006] Bei den bekannten seriellen Hybridfahrzeugen ist im Allgemeinen die Brennkraftmaschine und der Generator so dimensioniert, dass der maximale Leistungsbedarf abgedeckt werden kann.In the known serial hybrid vehicles, the internal combustion engine and the generator is generally dimensioned so that the maximum power requirement can be covered.

[0007] Aufgabe der Erfindung ist es, mit möglichst geringem technischen Aufwand temporäre Lastanforderungen bei Elektrofahrzeugen abzudecken.The object of the invention is to cover with minimal technical effort temporary load requirements in electric vehicles.

[0008] Erfindungsgemäß wird dies dadurch erreicht, dass die Stromerzeugungseinrichtung für einen mittleren Leistungsbedarf der elektrischen Antriebsmaschine bei einer definierten Dauergeschwindigkeit des Elektrofahrzeuges in der Ebene ausgelegt wird, dass der Einschaltladezustand in Abhängigkeit eines Fahrzieles und/oder einer geplanten Fahrtroute festgelegt wird, wobei für zumindest zwei Fahrabschnitte einer geplanten Fahrtroute unterschiedliche Einschaltladezustände flexibel definiert werden, und der Einschaltladezustand in einem selbstlernenden Prozess auf der Basis von absolvierten Fahrten des Elektrofahrzeuges angesetzt wird.According to the invention this is achieved in that the power generating device is designed for a mean power demand of the electric drive machine at a defined continuous speed of the electric vehicle in the plane that the Einschaltladezustand is determined depending on a destination and / or a planned route, wherein at least two driving sections of a planned route different Einschaltladezustände be flexibly defined, and the Einschaltladezustand is recognized in a self-learning process on the basis of completed trips of the electric vehicle.

[0009] Vorzugsweise wird der Einschaltladezustand so angesetzt, dass mindestens 10%, vorzugsweise mindestens 30% der Kapazität des Energiespeichers als Energiereserve verbleibt. Auf diese Weise lassen sich alle Betriebsbereiche des Fahrzeuges abdecken.Preferably, the Einschaltladezustand is set so that at least 10%, preferably at least 30% of the capacity of the energy storage remains as an energy reserve. In this way, all operating ranges of the vehicle can be covered.

[0010] Dadurch, dass der Einschaltladezustand in Abhängigkeit eines Fahrzieles und/oder einer geplanten Fahrtroute festgelegt wird, und für zumindest zwei Fahrabschnitte einer geplan- ten Fahrtroute unterschiedliche Einschaltladezustände definiert werden kann der Streckencharakter bei der Definition des Einschaltladezustandes mit berücksichtigt werden.Characterized in that the Einschaltladezustand is determined depending on a destination and / or a planned route, and for at least two driving sections of a planned route different Einschaltladezustände be defined the track character in the definition of Einschaltladezustandes be taken into account.

[0011] Dadurch, dass die Stromerzeugungseinrichtung für einen mittleren Leistungsbedarf der elektrischen Antriebsmaschine bei definierter Nenngeschwindigkeit in der Ebene ausgelegt wird, lässt sich eine sehr kompakte Bauweise erzielen.Characterized in that the power generating device is designed for a mean power requirement of the electric drive machine at a defined nominal speed in the plane, a very compact design can be achieved.

[0012] Die Erfindung wird im Folgenden anhand der Figuren näher erläutert. Es zeigen: [0013] Fig. 1 den Ladezustand des elektrischen Energiespeichers überder Betriebszeit und [0014] Fig. 2 ein Auslegungsdiagramm für die Stromerzeugungseinrichtung.The invention will be explained in more detail below with reference to the figures. 1 shows the state of charge of the electrical energy store over the operating time, and [0014] FIG. 2 shows a design diagram for the power generation device.

[0015] In Fig. 1 ist der Ladezustand SOC des elektrischen Energiespeichers des elektrisch angetriebenen Fahrzeuges über der Zeit t aufgetragen. Bei herkömmlichen Elektrofahrzeugen werden die elektrischen Energiespeicher im Fährbetrieb bis auf den technisch möglichen Minimalladezustand geleert, welcher eine technische Untergrenze SOC2 für die Fahrbarkeit des Elektrofahrzeuges darstellt. Nach Erreichen dieses Zustandes ist die verfügbare Fahrleistung unmittelbar von der Energiezufuhr der Stromerzeugungseinrichtung (Range Extender) abhängig und damit begrenzt.In Fig. 1, the state of charge SOC of the electrical energy storage of the electrically driven vehicle over time t is plotted. In conventional electric vehicles, the electrical energy storage in ferry mode are emptied to the technically possible minimum charge state, which represents a lower technical limit SOC2 for the drivability of the electric vehicle. After reaching this state, the available driving performance is directly dependent on the power supply of the power generation device (Range Extender) and thus limited.

[0016] Gemäß dem vorgestellten Verfahren wird die Stromerzeugungseinrichtung nicht erst an der technischen Untergrenze SOC2 des elektrischen Energiespeichers, sondern im Bereich eines mittleren ersten Ladezustandes - dem Einschaltladezustand SOC1 - aktiviert, sodass eine restliche Energiereserve R im Energiespeicher verbleibt. Durch die Definition des Einschaltladezustandes SOC1 oberhalb der technischen Untergrenze SOC2, die nach Erreichen den Ladevorgang durch die Stromerzeugungseinrichtung auslöst, kann die Begrenzung der abgerufenen Fahrleistung durch Pufferung über die Energiereserve R bis an die Systemlimits erweitert werden. Damit können temporäre Spitzenleistungen, wie Beschleunigungen oder Steigungen abgedeckt werden, ohne die Leistung der Stromerzeugungseinrichtung für die Spitzenlast, sondern nur für eine mittlere Leistung zu dimensionieren.According to the presented method, the power generating device is not only at the lower technical limit SOC2 of the electric energy storage, but in the range of a first average state of charge - the Einschaltladezustand SOC1 - activated so that a residual energy reserve R remains in the energy storage. By the definition of the Einschaltladezustandes SOC1 above the lower technical limit SOC2, which triggers the charging process by the power generation device after reaching the limit of the recalled driving performance can be extended by buffering the energy reserve R up to the system limits. Thus, temporary peak powers, such as accelerations or gradients can be covered, without dimensioning the power of the power generating device for the peak load, but only for an average power.

[0017] In Fig. 1 ist mit der strichlierten Linie 1 der Fährbetrieb mit einem konventionellen elektrisch angetriebenen Elektrofahrzeug und mit 2 der Fährbetrieb nach dem hier beschriebenen Verfahren dargestellt. Erreicht der Ladezustand SOC den Einschaltladezustand SOC1 (Punkt 3), so wird die Stromerzeugungseinrichtung hinzugeschaltet, wobei nur mehr Energieanforderungen, welche über die Leistung der Stromerzeugungseinrichtung hinausgehen, aus der Energiereserve R des elektrischen Energiespeichers genommen werden.In Fig. 1 is shown with the dashed line 1 of the ferry operation with a conventional electrically powered electric vehicle and with 2 the ferry operation according to the method described here. If the state of charge SOC reaches the switch-on charge state SOC1 (point 3), then the power generation device is connected, with only more energy requirements, which go beyond the power of the power generation device, being taken from the energy reserve R of the electrical energy store.

[0018] Fig. 2 zeigt ein Auslegungsdiagramm für die Stromerzeugungseinrichtung (Range Extender), wobei die Leistung P über der Fahrgeschwindigkeit v aufgetragen ist. Für die Auslegung gilt die Vorgabe, dass das Elektrofahrzeug im Betrieb mit dem Range Extender keine Fahrleistungseinbusen im Vergleich zum rein elektrischen Betrieb aufweisen soll. Das Elektrofahrzeug ist auf eine bestimmte Fahrleistung (Dynamik, Steigfähigkeit, Höchstgeschwindigkeit, etc.) ausgelegt. Die Leistung der Stromerzeugungseinrichtung kann deutlich geringer sein, als die Leistung des Antriebsmotors des Elektrofahrzeuges. Die Stromerzeugungseinrichtung wird so ausgelegt, dass sie die Maximalgeschwindigkeit des Elektrofahrzeuges in der Ebene, inklusive Nebenverbraucher, abdeckt. Die darüber hinausgehenden dynamischen Anforderungen werden über eine festgelegte elektrische Reserve R des elektrischen Energiespeichers (Fahrzeugbatterie) abgedeckt.Fig. 2 shows a design diagram for the power generation device (Range Extender), the power P is plotted against the vehicle speed v. For the design, the requirement is that the electric vehicle during operation with the range extender should not have any loss of performance compared to purely electrical operation. The electric vehicle is designed for a specific driving performance (dynamics, climbing ability, maximum speed, etc.). The power of the power generation device can be significantly lower than the power of the drive motor of the electric vehicle. The power generation device is designed so that it covers the maximum speed of the electric vehicle in the plane, including auxiliary consumers. The additional dynamic requirements are covered by a specified electrical reserve R of the electrical energy storage unit (vehicle battery).

[0019] Berechnungen haben ergeben, dass beispielsweise bei einem Elektrofahrzeug mit 1450 kg Gesamtgewicht mit einer elektrischen Energiereserve R von etwa 2 kWh die Fahrdynamik abgedeckt werden kann. In Fig. 2 sind die Widerstandskurven 4, 5, 6, 7 für verschiedene Steigungen eingetragen, wobei mit den gestrichelten Kurven 4', 5', 6', 7' der Energiebedarf unter Verwendung von zusätzlichen Nebenaggregaten dargestellt ist. Betrachtet man als Beispiel ein Aggregat mit 15 kW elektrischer Leistung, was einer Radleistung von ca. 13 kW entsprechen würde, dann erkennt man, dass man mit diesem gewählten Fahrzeug (1475 kg voll besetzt) eine Konstantgeschwindigkeit von 100 km/h erreichen könnte. Setzt man eine elektrische Ener- giereserve R von 2 kWh ein, dann kann man diese Geschwindigkeit von 100 km/h auch bei einer Steigung von 2% 21 km weit mit dem Range Extender und der Batterie fahren (siehe Punkt 11). Alternativ dazu könnte 22 mal von 100 km/h auf 120 km/h beschleunigt werden. Zum Vergleich dazu kann bei 80 km/h bei einer 2%igen Steigung eine Distanz über 66 km zurückgelegt oder 28 Beschleunigungsvorgänge von 80 km/h auf 100 km/h gefahren werden (siehe Punkt 12). Bei einer Steigung von 5% läst sich mit der Energiereserve R eine Distanz von 9 km oder 19 Beschleunigungsvorgänge von 100 km/h auf 120 km/h durchführen, wie mit Punkt 13 angedeutet ist. Das Bezugszeichen 14 bezeichnet einen Betriebspunkt bei 80 km/h bei einer Steigung von 5%, bei dem 12 km mit der Energiereserve R oder 25 Beschleunigungsvorgänge von 80 km/h auf 100 km/h durchgeführt werden können. Punkt 15 markiert einen Betriebspunkt für eine Fahrgeschwindigkeit von 60 km/h, bei der eine Distanz über 22 km zurückgelegt werden kann, oder bei der 34 Beschleunigungsvorgänge von 60 km/h auf 80 km/h durchgeführt werden können. Bei einer Steigung von 10% und einer Fahrgeschwindigkeit von 60 km/h kann mit der Energiereserve R nur mehr eine Distanz von etwa 6 km zurückgelegt oder 28 Beschleunigungsvorgänge von 60 km/h auf 80 km/h durchgeführt werden (Punkt 16).Calculations have shown that, for example, in an electric vehicle with 1450 kg total weight with an electrical energy reserve R of about 2 kWh driving dynamics can be covered. In Fig. 2, the resistance curves 4, 5, 6, 7 registered for different gradients, with the dashed curves 4 ', 5', 6 ', 7' of the energy demand is shown using additional ancillaries. Looking at an example of an aggregate with 15 kW of electrical power, which would correspond to a wheel power of about 13 kW, then you realize that with this selected vehicle (1475 kg fully occupied) could reach a constant speed of 100 km / h. If one uses an electrical energy reserve R of 2 kWh, then this speed of 100 km / h can be traveled 21 km with a range extender and a battery even at a gradient of 2% (see point 11). Alternatively, it could be accelerated 22 times from 100 km / h to 120 km / h. For comparison, at 80 km / h with a 2% gradient, a distance of 66 km can be covered or 28 acceleration events can be traveled from 80 km / h to 100 km / h (see point 12). With a gradient of 5%, the energy reserve R allows a distance of 9 km or 19 acceleration events from 100 km / h to 120 km / h, as indicated by point 13. The reference numeral 14 denotes an operating point at 80 km / h at a gradient of 5%, in which 12 km can be performed with the energy reserve R or 25 acceleration operations from 80 km / h to 100 km / h. Point 15 marks an operating point for a driving speed of 60 km / h, where a distance of 22 km can be covered, or where 34 acceleration operations from 60 km / h to 80 km / h can be performed. With a gradient of 10% and a travel speed of 60 km / h, the energy reserve R can only travel a distance of about 6 km or 28 acceleration processes from 60 km / h to 80 km / h (point 16).

[0020] Der Einschaltladezustand SOC1 bzw. die Energiereserve R kann vom Fahrzeughersteller aufgrund des geschätzten Nutzungsprofiles des elektrischen Fahrzeuges festgelegt werden. Alternativ dazu ist es auch möglich, den Einschaltladezustand SOC1 flexibel während des Betriebes des Elektrofahrzeuges mittels eines selbstlernenden Systems zu bestimmen. Dabei können in der Vergangenheit zurückliegende Fahrten des Elektrofahrzeuges die Basis für eine Neufixierung des Einschaltladezustandes SOC1 bilden, sodass eine werksmäßig vordefinierte Einstellung nach Unten oder nach Oben aufgrund der tatsächlichen Wegstrecken nachjustiert werden kann. Beispielsweise kann es bei einer großen Anzahl von Fahrzeugbeschleunigungen und überdurchschnittlich steilen Fahrabschnitten sinnvoll sein, eine größere Energiereserve R vorzusehen, wodurch die Stromerzeugungseinrichtung im elektrischen Fährbetrieb früher aktiviert wird. Andererseits kann es bei gleichmäßigen Fahrten auf ebenen Straßen mit durchschnittlicher Geschwindigkeit durchaus sinnvoll sein, die elektrische Energiereserve R zu vermindern und das Aktivieren der Stromerzeugungseinrichtung zu verzögern, wodurch Kraftstoff eingespart und unnötige Emissionen verhindert werden können.The Einschaltladezustand SOC1 or the energy reserve R can be determined by the vehicle manufacturer based on the estimated usage profile of the electric vehicle. Alternatively, it is also possible to determine the switch-on state of charge SOC1 flexibly during operation of the electric vehicle by means of a self-learning system. In this case, past journeys of the electric vehicle in the past can form the basis for a re-establishment of the start-up charge state SOC1, so that a factory-preset setting can be readjusted downwards or upwards on the basis of the actual travel distances. For example, it may be useful in a large number of vehicle accelerations and above-average steep sections to provide a larger reserve of energy R, whereby the power generation device is activated earlier in the electric ferry operation. On the other hand, with even rides on even roads at average speed, it may be reasonable to reduce the electrical reserve R and delay activation of the power plant, thereby saving fuel and avoiding unnecessary emissions.

[0021] Besonders vorteilhaft ist es, wenn aufgrund der in ein Navigationssystem eingegebenen Zieldaten und aufgrund von Informationen über das Verkehrsaufkommen der Energiebedarf für die Überwindung der vorausliegenden Fahrstrecke unter Berücksichtigung von Hindernissen, wie Steigungen, Staus oder dgl., abgeschätzt wird und die optimale Energiereserve und somit die Lage des für die Aktivierung der Stromerzeugungseinrichtung maßgebenden Einschaltladezustandes SOC1 berechnet wird. Diese Optimierung kann unter Gewichtung der Fahrtdauer oder des Kraftstoffverbrauches bzw. der Emissionen erfolgen. Weiters ist es auch möglich, dass für bestimmte Fahrabschnitte unterschiedliche Energiereserven R flexibel definiert werden. Dies ist insbesondere dann von Vorteil, wenn sich der überwiegende Streckencharakter (Steilheit, Kurvigkeit, Verkehrsaufkommen) im Zuge einer Fahrroute ändert.It is particularly advantageous if, on the basis of the target data entered in a navigation system and on the basis of information about the traffic volume, the energy requirement for overcoming the route ahead is estimated, taking into account obstacles such as gradients, traffic jams or the like, and the optimum energy reserve and thus the position of the relevant for the activation of the power generating device Einschaltladezustandes SOC1 is calculated. This optimization can be done by weighting the journey time or the fuel consumption or the emissions. Furthermore, it is also possible that different energy reserves R are flexibly defined for certain driving sections. This is particularly advantageous if the predominant track character (steepness, curvature, traffic) changes in the course of a route.

Claims (2)

Patentansprüche 1. Verfahren zum Betreiben eines Elektrofahrzeuges, welches zumindest eine elektrische Antriebsmaschine, zumindest einen elektrischen Energiespeicher, sowie zumindest eine Stromerzeugungseinrichtung aufweist, wobei die Stromerzeugungseinrichtung ab einem definierten Ladezustand (SOC) des elektrischen Energiespeichers aktiviert wird, wobei die Stromerzeugungseinrichtung noch vor Erreichen einer unteren technischen Betriebsgrenze des Ladezustandes des elektrischen Energiespeichers bei einem definierten Einschaltladezustand (SOC1) aktiviert wird, wobei der Einschaltladezustand (SOC1) in Bezug auf die untere technische Betriebsgrenze (SOC2) eine Energiereserve (R) des elektrischen Energiespeichers definiert, deren Größe so bemessen wird, dass in Anzahl, Größe und/oder Dauer definierte Spitzenleistungen, vorzugsweise Fahrzeugbeschleunigungen und/oder Steigungen abgedeckt werden können dadurch gekennzeichnet, dass die Stromerzeugungseinrichtung für einen mittleren Leistungsbedarf der elektrischen Antriebsmaschine bei einer definierten Dauergeschwindigkeit des Elektrofahrzeuges in der Ebene ausgelegt wird, dass der Einschaltladezustand (SOC1) in Abhängigkeit eines Fahrzieles und/oder einer geplanten Fahrtroute festgelegt wird, wobei für zumindest zwei Fahrabschnitte einer geplanten Fahrtroute unterschiedliche Einschaltladezustände (SOC1) flexibel definiert werden, und der Einschaltladezustand (SOC1) in einem selbstlernenden Prozess auf der Basis von absolvierten Fahrten des Elektrofahrzeuges angesetzt wird.1. A method for operating an electric vehicle, which has at least one electric drive machine, at least one electrical energy storage, and at least one power generating device, wherein the power generating device is activated from a defined state of charge (SOC) of the electrical energy storage, wherein the power generating device before reaching a lower technical operating limit of the state of charge of the electric energy storage is activated at a defined Einschaltladezustand (SOC1), the Einschaltladezustand (SOC1) with respect to the lower operating limit technical (SOC2) defines an energy reserve (R) of the electrical energy storage whose size is such that peak power defined in number, size and / or duration, preferably vehicle accelerations and / or gradients can be covered, characterized in that the power generating device for a medium Lei stungsbedarf the electric drive machine is designed at a defined continuous speed of the electric vehicle in the plane that the Einschaltladezustand (SOC1) is determined depending on a destination and / or a planned route, with different Einschaltladezustände (SOC1) flexibly defined for at least two driving sections of a planned route and the on-charge state (SOC1) is set in a self-learning process based on completed trips of the electric vehicle. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Einschaltladezustand (SOC1) so angesetzt wird, dass mindestens 10%, vorzugsweise mindestens 30% der Kapazität des Energiespeichers als Energiereserve (R) verbleibt. Hierzu 1 Blatt Zeichnungen2. The method according to claim 1, characterized in that the Einschaltladezustand (SOC1) is set so that at least 10%, preferably at least 30% of the capacity of the energy storage as energy reserve (R) remains. For this 1 sheet drawings
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AT506272A2 (en) 2009-07-15

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