SE1651035A1 - Vehicle with AC outlet - Google Patents

Vehicle with AC outlet Download PDF

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Publication number
SE1651035A1
SE1651035A1 SE1651035A SE1651035A SE1651035A1 SE 1651035 A1 SE1651035 A1 SE 1651035A1 SE 1651035 A SE1651035 A SE 1651035A SE 1651035 A SE1651035 A SE 1651035A SE 1651035 A1 SE1651035 A1 SE 1651035A1
Authority
SE
Sweden
Prior art keywords
power
mode
battery
electric system
converter
Prior art date
Application number
SE1651035A
Other languages
Swedish (sv)
Other versions
SE540091C2 (en
Inventor
Poli Ninos
Sjoedin Robert
Original Assignee
Scania Cv Ab
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 Scania Cv Ab filed Critical Scania Cv Ab
Priority to SE1651035A priority Critical patent/SE540091C2/en
Priority to DE112017003038.2T priority patent/DE112017003038T5/en
Priority to PCT/SE2017/050683 priority patent/WO2018013036A1/en
Publication of SE1651035A1 publication Critical patent/SE1651035A1/en
Publication of SE540091C2 publication Critical patent/SE540091C2/en

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Classifications

    • 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
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
    • 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
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/006—Supplying electric power to auxiliary equipment of vehicles to power outlets
    • 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
    • B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
    • 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
    • B60L53/10—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 the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • 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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • 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
    • B60L2210/30—AC to DC converters
    • 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
    • B60L2210/40—DC to AC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/20—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units
    • B63H2021/202—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units of hybrid electric type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/20—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units
    • B63H2021/202—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units of hybrid electric type
    • B63H2021/205—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units of hybrid electric type the second power unit being of the internal combustion engine type, or the like, e.g. a Diesel engine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J3/00—Driving of auxiliaries
    • B63J3/02—Driving of auxiliaries from propulsion power plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J3/00—Driving of auxiliaries
    • B63J3/04—Driving of auxiliaries from power plant other than propulsion power plant
    • 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
    • Y02T90/14—Plug-in electric vehicles

Abstract

An electric system 1 for a motor vehicle and a method for controlling the electric system. The electric system 1 comprises an electric machine 13, a battery 2 for powering the electric machine 13, at least one charging connector 7 provided with an AC connection for connection to an external charging station 20, a first AC/DC converter 4 configured to receive AC power from the at least one charging connector 7, to convert the AC power into DC power and to supply DC power to the battery 2 during charging. The at least one AC power outlet 5, 6 is arranged between the charging connector 7 and the AC side of the of the first AC/DC converter 4, wherein in a first mode of operation the electric system receives AC power by means of the charging connector 7 and supply AC power directly to the at least one AC power outlet.In further modes of operation, the first AC/DC converter is used to power the at least one AC power outlet 5, 6.(Figure 1)

Description

Vehicle with AC outlet Technical Field The present invention relates to electric or plug-in hybrid motor vehicles havinga battery that may be charged by means of an external charging station. Thepresent invention primarily concerns land motor vehicles, but may also be usedfor other hybrid or electrically driven vehicles, such as boats, ships or yachts.The present invention especially concerns providing AC power to accessoriesor equipment of the motor vehicle.
Background and Prior Art Electric and plug-in hybrid motor vehicles usually comprise a chargingconnector for receiving power from an external charging station. Chargingstations may include means for supplying electric DC power as well as electricAC power. For receiving AC power, a plug-in hybrid vehicle may be providedwith a charger in the form of an AC/DC converter that converts the AC powerinto DC power, which is supplied to, and charges, the battery of the hybridvehicle.
Land motor vehicles, such as cars, buses or trucks, usually include a lowvoltage DC electric system, e.g. a 12 V or 24 V system, to power equipmentand accessories, such as for example lights, a stereo, a cooler, a heater. Thelow voltage DC electric system has limited energy storage means. Electric andhybrid motor vehicles usually include a second electric system at a higher DCvoltage, which is used for storing energy to power an electric machine orelectric motor of the vehicle. The second electric system is used for propellingthe vehicle and usually has a higher energy storing capacity then the low voltage system. l\/lany electrical apparatuses run on AC power, such as 110 V or 220 V of ACpower. ln order to use such apparatuses in a vehicle it is beneficial if the vehicle is provided with AC power outlets. Such AC power outlets could be powered with energy of the high voltage DC system provided an AC/DC converter isused to convert the DC power into AC power.
US 2007/0012492 (D1) describes a hybrid vehicle that selectively may outputAC power to a load. The hybrid vehicle includes a battery or power storage (30in D1) that can power an electric machine (17 in D1), by means of an AC/DCconverter (32 in D1) that converts DC power from the battery into AC power forthe electric machine (17), see figure 2 in D1. The hybrid vehicle of D1 alsocomprises a switch/power conditioning module (50 in figure 2) that may power aload (52 in figure 2). The switch/power conditioning module (50) includes atransformer, see §OO44 of D1. D1 does however not describe a plug-in hybrid vehicle. l\/loreover, the AC/DC converter used in D1 for powering the loads is the AC/DCconverter used for powering the electric motor, and is as such probablyspecifically adapted for powering the electric motor and may not be ideal for powering other types of AC apparatuses.
Summary of lnventionAn aim of the invention is to provide an alternative way for an electric or hybridvehicle to supply AC power.
An aim of the invention is to provide an electric system for a motor vehicle that is better adapted for providing AC power than known systems.
A further aim of the invention is to provide a more versatile electric system for amotor vehicle that may output AC power in a variety of situations. ln accordance with a first aspect, the present invention provides an electricsystem for a motor vehicle. The electric system comprises an electric machinefor propelling the motor vehicle, a battery for powering the electric machine, at least one charging connector provided with an AC connection for connection to an external charging station, a first AC/DC converter having a DC side and anAC side, wherein the first AC/DC controller is: - configured to receive AC power from the at least one charging connector, - configured to convert the AC power into DC power, and - configured to supply DC power, from its DC side, to the battery duringcharging of the battery from the external charging station.
The electric system further comprises at least one controller, which at least onecontroller is operatively connected to the first AC/DC converter and the chargingconnector and which at least one controller is configured to control the electric system in a first mode of operation.
Especially, the electric system comprises at least one AC power outlet arrangedbetween the charging connector and the AC side of the of the first AC/DCconverter, wherein the first mode of operation comprises receiving AC powerfrom the charging connector during charging from an external charging stationthat supplies AC power, and supplying AC power to the at least one AC poweroutlet.
Thus, the electric system may provide AC power to the outlet or outlets directlyfrom the external charging station, i.e. without any intermediate DC powersteps, so that an AC power connection is established between the chargingconnector and the AC power outlet or outlets.
The motor vehicle may include an internal combustion engine, wherein thevehicle is a so called plug-in hybrid vehicle, but may also be a fully electricalvehicle. ln an embodiment of the first aspect, the first AC/DC converter is a bi-directionalconverter and wherein the at least one controller is configured to control theelectric system in at least one further mode of operation, which at least one further mode of operation comprises supplying AC power from the first AC/DC converter to the at least one AC power outlet. Thus, the electric system may forexample provide AC power to the power outlet or outlets also when the vehicle is not connected to an external charging station. ln an embodiment of the first aspect, the at least one charging connector isprovided with a DC connection for connecting to an external charging station that supplies DC power. ln an embodiment of the first aspect, the electric system further comprises acurrent collector configured to receive DC power from overhead lines. ln an embodiment of the first aspect, the at least one further mode of operationcomprises a second mode of operation comprising: - receiving DC power, which DC power is received by means of either one ofthe at least one charging connector and the current collector, - charging the battery, and - simultaneously convert DC power into AC power by means of the first AC/DC COFIVGITGI".
Thus, the electric system may provide AC power to the AC power outlet or outlets also when being charged by DC power. ln an embodiment of the first aspect, the at least one further mode of operationcomprises a third mode of operation comprising converting DC power from thebattery to AC power by means of the first AC/DC converter. Thus, the electric system may provide AC power to the AC power outlet, or outlets, by using DC power of the battery. ln an embodiment of the first aspect, the at least one further mode of operationcomprises a fourth mode of operation comprising powering the electric machineby converting DC power from the battery into AC power by means of the second AC/DC converter, and converting DC power from the battery to AC power by means of the first AC/DC converter. Thus, the electric system may propel thevehicle by means of the electric machine simultaneously as supplying AC power to the AC power outlet, or outlets. ln an embodiment of the first aspect, the at least one further mode of operationcomprises a fifth mode of operation comprising using the electric machine toretrieve power during travelling, convert the retrieved power into DC power bymeans of the second AC/DC converter, charging the battery with DC powerfrom the second AC/DC converter, and converting DC power into AC power bymeans of the first AC/DC converter. Thus, the electric system may provide ACpower to the AC power outlet, or outlets, simultaneously as providing a re-generative charging of the battery. ln an embodiment of the first aspect, the electric system is further provided withan induction power receiver configured to receive electric power from anexternal source by means of induction, and to supply DC power to the battery,wherein the at least one further mode of operation comprises a sixth mode ofoperation comprising receiving power by means of the induction power receiver,charging the battery and simultaneously converting DC power into AC power by means of the first AC/DC converter. ln accordance with a second aspect, the present invention provides an electricor hybrid motor vehicle that includes an electric system according to the first aspect of the present invention. ln accordance with a third aspect, the present invention provides a method forcontrolling an electric system of a motor vehicle, which motor vehiclecomprises: - an electric machine for propelling the motor vehicle, - a battery for powering the electric machine, - at least one charging connector provided with an AC connection for connection to an external charging station, - a first AC/DC converter having a DC side and an AC side.
The first AC/DC controller of the motor vehicle is configured to receive ACpower from the at least one charging connector, is configured to convert the ACpower into DC power and is configured to supply DC power to the battery duringcharging of the battery with power from the external charging station. Theelectric system further comprises at least one AC power outlet arrangedbetween the charging connector and the AC side of the of the first AC/DCconverter. The method of the third aspect comprises controlling the electricsystem in a first mode of operation that comprises: - receiving AC power from the charging connector during charging from anexternal charging station that supplies AC power, and - supplying AC power to the at least one AC power outlet at the same time assupplying DC power to the battery.
The received AC power is supplied directly to the at least one AC power outlet without any intermediate conversion into DC power.
An embodiment of the third aspect, further comprises controlling the electricsystem in at least one further mode of operation, which at least one furthermode of operation comprises supplying AC power from the first AC/DCconverter to the at least one AC power outlet. ln an embodiment of the third aspect, the at least one further mode of operationcomprises a second mode of operation comprising - receiving DC power, and - converting DC power into AC power and supplying AC power to the at leastone AC power outlet at the same as supplying DC power to the battery. ln an embodiment of the third aspect, the at least one further mode of operationcomprises a third mode of operation comprising- converting DC power from the battery to AC power, and - supplying the AC power to the at least one AC power outlet. ln an embodiment of the third aspect, the at least one further mode of operationcomprises a fourth mode of operation comprising: - converting DC power from the battery to AC power, - supplying AC power to the at least one AC power outlet and at the same timesupplying AC power the electric machine. ln an embodiment of the third aspect, the at least one further mode of operationcomprises a fifth mode of operation comprising: - retrieving power during travelling by using the electric machine as a generator,-converting the retrieved power into DC power and supplying DC power to thebattery, and - converting DC power into AC power and supplying AC power to the at leastone AC power outlet.
The electric system is configured for performing the control method of a thirdaspect of the invention, and the motor vehicle of the second aspect may includean electric system that is configured to perform the method of the third aspect.
Brief Description of Drawings Figure 1 illustrates parts of a motor vehicle in accordance with the presentinvention, especially the electric system of the vehicle; Figures 2A-E illustrates different ways of controlling the electric system of thevehicle in order to power an AC outlet of the vehicle; Figure 3 illustrate a control method for the electric system.
Description of Embodiments Figure 1 shows parts of a motor vehicle, especially the electric system 1 of themotor vehicle. The motor vehicle comprises an electric machine 13 forpropelling the motor vehicle and may also comprise an internal combustionengine (not illustrated). The electric system 1 of the motor vehicle is provided with a battery 2 and a charging connector 7 for charging the battery 2. The battery 2 has a voltage level of for example 400 V or 650 V. The chargingconnector 7 is a combined AC and DC connector configured for receiving AC power as well as DC power from an external charging station 20. ln an alternative embodiment (not illustrated), i.e. instead of the combined ACand DC charging connector 7, the electric system 1 comprises two separatecharging connectors; one for AC power and one for DC power. As an alternativeor in addition to the separate DC connector, and in addition to the separate ACconnector, or to the combined connector 7, the electric system 1 may beprovided with other means (7A, 7B) for charging the battery 2. Figure 1 illustrateto such charging means in dashed lines; - a current collector 7A configured to receive DC power from an overhead line20A and supply DC power to the battery 2, and - an induction receiver 7B configured for receiving power by means of inductionfrom an inductive power source 20B, such as an inductive power source 20Bprovided in a road surface.
The current collector 7A that is configured to receive current from an overheadline system may for example comprise a one- or two-arm pantograph collector, a bow collector or a trolley pole.
The induction receiver 7B is configured to receive inductive power andtransform the power into DC power that is supplied in the DC side of the electric system 1 to charge the battery 2.
The electric system 1 of figure 1 may preferably be adapted for receiving ACpower at different voltage levels, three-phase AC as well as single-phase AC bymeans of the charging connector 7, for example single-phase 230 V AC andthree-phase 400 V AC. The charging connector 7 is configured to receive DCpower of at least one voltage level, such as two different levels, for example at400 V DC and 650 V DC. A DC/DC converter 11 is arranged electrically between the charging connector 7 and the battery 2 and configured for converting DC power received at the charging connector 7 to the voltage levelof the battery 2. The DC/DC converter 11 is arranged to selectively beconnected between the charging connector 7 and the battery, and selectivelybypassed when the DC power is received at the same voltage level as thevoltage level of the battery 2.
The electric system 1 is provided with an AC/DC converter, or first AC/DCconverter, 4 arranged electrically between the charging connector 7 and thebattery 2, and which first AC/DC converter 4 is configured for converting ACpower received at the charging connector 7 to DC power at the voltage level ofthe battery 2. The electric system 1 also includes a DC junction box 8 arrangedto selectively connect the first AC/DC converter 4 to the battery 2.
The electric system 1 is further configured to supply power from the battery 2 tothe electric machine 13. The battery 2 is connected to the electric machine 13via the DC junction box 8 and a second AC/DC converter 12. The electricmachine 13 may also act as a generator and retrieve AC electric power duringdriving and/or braking and feed this re-generated electric power to the battery 2via the second AC/DC converter that converts the AC power to DC power, andvia the DC junction box 8. Thus, the second AC/DC converter 12 is bi-directional.
The electric system 1 also includes an AC junction box 9 arranged electricallybetween the charging connector 7 and the first AC/DC converter 4. The electricsystem 1 further comprises a first AC outlet 5 and a second AC outlet 6connectable to the first AC/DC converter 4 and/or the charging connector 7 bymeans of the AC junction box 9. Also the first AC/DC converter 4 is a bi-directional AC/DC converter 4 configured to receive AC as well as DC andsupply DC and AC, respectively.
Both junction boxes 8, 9 are configured with relays and breakers to enable a selective power transfer between the devices. The electric system 1 further includes a controller 10 that is operatively connected to the AC junction box 9,the DC junction box 8, the DC/DC converter 11, the first AC/DC converter 4 andthe second AC/DC converter 12.
The DC junction box 8 is configured for selective power transfer between thebattery 2, the DC side of the first AC/DC converter 4, the DC side of the secondAC/DC converter 12, and the charging connector 7. The DC junction box 8 iseither connected to the charging connector 7 directly, or via the DC/DCconverter 11 (i.e. via the DC/DC converter 11 when the received DC power hasa different voltage level than the battery 2).
The AC junction box 9 is configured for selective interconnection of the chargingconnector 7, the AC side of the first AC/DC converter and the AC outlets 5, 6.Thus, the first AC outlet 5 and the second AC outlet 6 may selectively receivepower from either the AC side of the first AC/DC converter 4 or from thecharging connector 7.
For ease of illustration, the controller 10 is illustrated as a central controlsystem, but may be arranged as a plurality of electronic control units in a distributed fashion among the different devices.
Figures 2A-2E illustrates different uses of the electric system 1 for providing ACpower to the outlets 5, 6. These uses can be seen as different modes ofoperation; a first mode of operation illustrated in figure 2A, a second, third,fourth and fifth mode of operation illustrated in figures 2B, 2C, 2D and 2E, respectively. lt should be note that the first AC/DC converter 4 is bi-directional and acts as:- a battery charger in the first mode by converting AC power from the externalcharging station into DC power, which is fed to the battery 2; and as 11 - an AC power supplier for the outlets 5, 6 in the second to fifth mode, byconverting DC power into AC power, which is fed to the one or more of theoutlets 5, 6. ln the second to fifth mode, the controller 10 controls the AC junction box 9 sothat the AC connection of the charging connector 7 is disconnected, and no AC power is supplied to the charging connector 7 from the first AC/DC converter 4. ln the first mode of figures 2A, the motor vehicle is charged by receiving ACpower from an external charging station 20, which AC power is received by thecharging connector 7 and supplied in the AC side of the electric system to theoutlets 5, 6 and the AC side of the first AC/DC converter 4 via the AC junctionbox 9. Thus, the AC power is fed without conversion to the outlets 5, 6, i.e.without AC conversion and without conversion into intermediate DC power.Further, in the first mode, the first AC/DC converter 4 acting as a charger of thebattery 2, converts AC power into DC power and supplies the DC power to thebattery 2, via the DC junction box 8. The second AC/DC converter 12, andthereby the electric machine 13, is disconnected from the DC power by meansof the DC junction box 8, as controlled by the controller 10. ln the second mode, illustrated in figure 2B, the motor vehicle is charged byreceiving DC power from an external charging station 20, which DC power issupplied to the battery 2. The DC power is supplied either directly to the battery2, or in case the voltage level differs from the voltage level of the battery, via theDC/DC converter 11 that converts the DC power into the voltage level of thebattery 2. The controller 10 is configured to connect the DC power (i.e. the DCpower of the voltage level of the battery) to the DC side of the first AC/DCconverter 4. The first AC/DC converter converts the DC power into AC power which is fed, via the junction box 9, to one or more of the outlets 5, 6.
The motor vehicle may be provided with a PTO, or power take-off, (not illustrated) which may be propelled by the electric machine 13, or the internal 12 combustion engine. Thus, in addition to charging the battery 2 in the first andsecond mode, the electric machine 13 may be supplied with electric power andpower the PTO, as indicated by broken arrows in figures 2A and 2B. Theelectric machine should never drive the wheels of the vehicle during chargingfrom an external charging station 20, and the gearbox may preferably be lockedin the neutral or in a parking brake position. The PTO may include a PTO shaft connected via a separate additional gearbox (not illustrated). ln the first and the second mode, the motor vehicle is charged by means of anexternal charging station 20, whereas in the third, fourth and fifth mode, themotor vehicle is not charged by an external charging station 20, i.e. does notreceive power from any external charging station, and the charging connector isnot connected to any external power source. l\/loreover, in the third, fourth andfifth mode the controller 10 is configured to disconnect the charging connector7, or keep the charging connector 7 disconnected, from the other parts of the electric system. ln the third mode and fourth modes, illustrated in figures 2C and 2D, one ormore of the outlets 5, 6 is supplied with power originating from the battery 2,which power is converted into AC power by means of the first AC/DC converter4. ln the third mode, the electric machine is not used, whereas in the fourth mode,the electric machine 13 is used as a motor to propel the motor vehicle. Forinstance, the third mode of operation can be used when the motor vehicle isparked or propelled by an internal combustion engine (if the motor vehicle has such an engine). ln the fifth mode, the electric machine 13 is used as a generator for retrievingpower when the motor vehicle is travelling, e.g. being driven or during braking,and thus the fifth mode provides a re-generative mode wherein power is supplied from the electric machine 13, via the second AC/DC converter 12 to 13 charge the battery 2. The AC/DC converter 4 is operated in the same way as inthe second to fourth modes and converts DC power into AC power which is supplied to at least one of the outlets 5, 6.
Since, the first AC/DC converter 4 acts as an AC power supplier in the secondto fifth mode, and converts the DC power received at its DC side into AC powerfor the outlets 5, 6, the first AC/DC converter 4 does not need to change itsoperation when the motor vehicle switches between any of the second to fifthmode. However, when the motor vehicle switches between operation in the firstmode and any other mode the controller 10 is configured to temporarilyinactivate the first AC/DC converter 4 during the mode switch. For example,when the first AC/DC converter acts in any mode as a AC power supplier, andthe charging connector 7 is being connected by the driver to an externalcharging station 20 that supplies AC power, the controller 10 is configured totemporarily inactivate the AC/DC converter 4 so that no power is fed from theAC/DC converter before establishing a power connection from the chargingconnector 7 to any of the outlets 5, 6 and the AC side of the first AC/DC converter 4.
Figure 3 illustrate a control method for the electric system 1. The control method200 comprises a first mode of operation 201 that includes - receiving AC power (201a) from the charging connector (7) during chargingfrom an external charging station (20) that supplies AC power, and - supplying AC (201 b) power to the at least one AC power outlet (5, 6) at thesame time as supplying DC power to the battery (2).
The control method 200 comprises further modes of operation 202-206 thatincludes supplying 210 AC power from the first AC/DC converter (4) to the atleast one AC power outlet (5, 6). The further modes of operation include asecond 202, third 203, fourth 204, fifth 205 and sixth 206 mode of operation.
The second mode of operation 202 comprises - receiving 202a DC power and charging the battery 2, and 14 - converting 202b DC power into AC power.ln the second mode, the AC power is supplied to the at least one AC power outlet 5, 6 at the same as DC power is supplied to the battery 2.
The third mode of operation 203 comprises: - converting 203a DC power from the battery 2 to AC power, and - supplying 203b the AC power to the at least one AC power outlet 5, 6.
Thus, in the third mode of operation 203, the power outlets 5, 6 are powered bythe battery 2.
The fourth mode of operation 204 comprises: - converting 204a DC power from the battery 2 into AC power for the electricmachine and into AC power for at least one outlet, - supplying 204b AC power to the at least one AC power outlet 5, 6 and at thesame time supplying AC power the electric machine 13.
Thus, in the fourth mode of operation 204, the power outlets 5, 6 and theelectric machine 13 are powered by the battery 2.
The fifth mode of operation 205 comprises: - retrieving 205a power during travelling by using the electric machine 13 as agenerator; -converting 205b the retrieved power into DC power and supplying DC power tothe battery 2, and - converting 205c DC power into AC power and supplying AC power to the atleast one AC power outlet 5, 6.
Thus, in the fifth mode of operation, the electric machine 13 is used for re-generative charging of the battery with retrieved power. Retrieved power is alsoused for powering the AC power outlet or outlets 5, 6, wherein the retrievedpower is first converted from AC power, of the electric machine 13, to DC powerand thereafter converted from DC power to AC power for the outlets.
The sixth mode of operation 206 comprises receiving 206a power by means ofthe induction power receiver (7B), charging 206b the battery (2) andsimultaneously converting DC power into AC power by means of the firstAC/DC converter (4).
An electric system 1 for a motor vehicle and a method for contro||ing the electricsystem has been described in embodiments. The electric system 1 comprisesan electric machine 13, a battery 2 for powering the electric machine 13, at leastone charging connector 7 provided with an AC connection for connection to anexternal charging station 20, a first AC/DC converter 4 configured to receive ACpower from the at least one charging connector 7, to convert the AC power intoDC power and to supply DC power to the battery 2 during charging. The at leastone AC power outlet 5, 6 is arranged between the charging connector 7 and theAC side of the of the first AC/DC converter 4, wherein in a first mode ofoperation the electric system receives AC power by means of the chargingconnector 7 and supply AC power directly to the at least one AC power outlet. ln further modes of operation, the first AC/DC converter is used to power the atleast one AC power outlet 5, 6.
The present invention is however not limited to these embodiments. Fïatherthese embodiments are examples for providing the present invention. A personskilled in the art will appreciate that the electric system, the method and themotor vehicle may be provided in further embodiments within the scope of the claims.

Claims (16)

16 Claims
1. An electric system (1) for a motor vehicle comprising an electricmachine (13) for propelling the motor vehicle, a battery (2) for powering theelectric machine (13), at least one charging connector (7) provided with an ACconnection for connection to an external charging station (20), a first AC/DCconverter (4) having a DC side and an AC side, wherein the first AC/DCconverter is configured to receive AC power from the at least one chargingconnector (7), to convert the AC power into DC power and to supply DC powerto the battery (2) during charging , and wherein the electric system comprises atleast one controller (10), which at least one controller (10) is operativelyconnected to the first AC/DC converter (4) and the charging connector (7) andwhich at least one controller (10) is configured to control the electric system (1)in a first mode of operation, c h a r a c t e ri z e d in comprising at least one AC power outlet (5, 6) arrangedbetween the charging connector (7) and the AC side of the of the first AC/DCconverter (4), wherein the first mode of operation comprises receiving AC powerby means of the charging connector (7), and supplying AC power to the at leastone AC power outlet (5, 6).
2. An electric system (1) according to claim 1, wherein the first AC/DCconverter (4) is a bi-directional converter and wherein the at least one controller(10) is configured to control the electric system in at least one further mode ofoperation, which at least one further mode of operation comprises supplying ACpower from the first AC/DC converter (4) to the at least one AC power outlet (5,6).
3. An electric system (1) according to claim 2, wherein the at least onecharging connector (7) is provided with a DC connection for connecting to anexternal charging station (20) that supplies DC power. 17
4. An electric system (1) according to claim 2 or 3, further comprisinga current collector (7A) configured to receive DC power from overhead lines(2OA).
5. An electric system (1) according to claim 3 or 4, wherein the atleast one further mode of operation comprises a second mode of operationcomprising receiving DC power by means of either one of the at least onecharging connector (7) and the current collector (7A), charging the battery (2),and simultaneously convert DC power into AC power by means of the firstAC/DC converter (4).
6. An electric system (1) according to any of claims 2 to 5, wherein theat least one further mode of operation comprises a third mode of operationcomprising converting DC power from the battery (2) to AC power by means ofthe first AC/DC converter (4).
7. An electric system (1) vehicle according to any of claims 2 to 6,wherein the at least one further mode of operation comprises a fourth mode ofoperation comprising powering the electric machine (13) by converting DCpower from the battery (2) into AC power by means of the second AC/DCconverter, and converting DC power from the battery (2) to AC power by meansof the first AC/DC converter (4).
8. An electric system (1) vehicle according to any of claims 2 to 7,wherein the at least one further mode of operation comprises a fifth mode ofoperation comprising using the electric machine (13) to retrieve power duringtravelling, convert the retrieved power into DC power by means of the secondAC/DC converter (12), charging the battery (2) with DC power from the secondAC/DC converter (12), and converting DC power into AC power by means of thefirst AC/DC converter (4). 18
9. An electric system (1) vehicle according to any of claims 2 to 8,further provided with an induction power receiver (7B) configured to receiveelectric power from an external source (20B) by means of induction, and tosupply DC power to the battery (2), wherein the at least one further mode ofoperation comprises a sixth mode of operation comprising receiving power bymeans of the induction power receiver (7B), charging the battery (2) andsimultaneously converting DC power into AC power by means of the firstAC/DC converter (4).
10. A motor vehicle comprising an electric system according to any ofclaims 1 to 9.
11. A method for controlling an electric system (1) of a motor vehicle, which motor vehicle comprises an electric machine (13) for propelling the motorvehicle, a battery (2) for powering the electric machine (13), at least onecharging connector (7) provided with an AC connection for connection to anexternal charging station (20), a first AC/DC converter (4) having a DC side andan AC side, wherein the first AC/DC converter is configured to receive ACpower from the at least one charging connector (7), configured to convert theAC power into DC power and to supply DC power to the battery (2) duringcharging of the battery (2) from the external charging station (20), and whichelectric system (1) comprises at least one AC power outlet (5, 6) arrangedbetween the charging connector (7) and the AC side of the of the first AC/DCconverter (4), wherein said method comprises controlling the electric system (1)in a first mode of operation (201) that comprises: - receiving AC power (201 a) from the charging connector (7) during chargingfrom an external charging station (20) that supplies AC power, and - supplying AC (201 b) power to the at least one AC power outlet at the sametime as supplying DC power to the battery (2).
12. The method for controlling an electric system (1) of a motor vehicle according to claim 11, said method further comprising controlling the electric 19 system in at least one further mode of operation, which at least one furthermode of operation comprises supplying AC power from the first AC/DC converter (4) to the at least one AC power outlet (5, 6).
13. The method for controlling an electric system (1) of a motor vehicleaccording to claim 12, wherein the at least one further mode of operationcomprises a second mode of operation (202) comprising - receiving (202a) DC power, and - converting (202b) DC power into AC power and supplying AC power to the atleast one AC power outlet (5, 6) at the same as supplying DC power to thebattery (2).
14. The method for controlling an electric system (1) of a motor vehicleaccording to claim 12 or 13, wherein the at least one further mode of operationcomprises a third mode of operation (203) comprising - converting (203a) DC power from the battery (2) to AC power, and - supplying (203b) the AC power to the at least one AC power outlet (5, 6).
15. The method for controlling an electric system (1) of a motor vehicleaccording to any of claims 12 to 14, wherein the at least one further mode ofoperation comprises a fourth mode of operation (204) comprising: - converting (204a) DC power from the battery (2) to AC power, - supplying (203b) AC power to the at least one AC power outlet (5, 6) andsupplying AC power the electric machine (13).
16. The method for controlling an electric system (1) of a motor vehicleaccording to any of claims 12 to 15, wherein the at least one further mode ofoperation comprises a fifth mode of operation (205) comprising- - retrieving (205a) power during travelling by using the electric machine (13) asa generator, -converting (205b) the retrieved power into DC power and supplying DC powerto the battery (2), and - converting (2050) DC power into AC power and supplying AC power to the atleast one AC power out|et (5, 6).
SE1651035A 2016-07-11 2016-07-11 Vehicle with AC outlet SE540091C2 (en)

Priority Applications (3)

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DE112017003038.2T DE112017003038T5 (en) 2016-07-11 2017-06-21 Vehicle with AC pantograph
PCT/SE2017/050683 WO2018013036A1 (en) 2016-07-11 2017-06-21 Vehicle with ac outlet

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EP1899192B1 (en) 2005-06-22 2019-09-11 Continental Automotive Systems, Inc. Power generation system suitable for hybrid electric vehicles
WO2008063612A2 (en) * 2006-11-16 2008-05-29 Cummins Power Generation Ip, Inc. Electric power generation system with multiple generators and/or inverters
GB0705248D0 (en) * 2007-03-19 2007-04-25 Cummins Generator Technologies Propulsion arrangement
US8043132B1 (en) * 2009-09-01 2011-10-25 Brunswick Corporation Method for operating a propulsion system of a watercraft

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