GB2556524A - Device and method for inductively transmitting electrical energy to movable electrical consumers - Google Patents

Device and method for inductively transmitting electrical energy to movable electrical consumers Download PDF

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Publication number
GB2556524A
GB2556524A GB1800415.0A GB201800415A GB2556524A GB 2556524 A GB2556524 A GB 2556524A GB 201800415 A GB201800415 A GB 201800415A GB 2556524 A GB2556524 A GB 2556524A
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United Kingdom
Prior art keywords
voltage
intermediate circuit
direct current
power regulating
electrical energy
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GB1800415.0A
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GB2556524A8 (en
GB201800415D0 (en
GB2556524B (en
Inventor
Wechlin Mathias
Green Andrew
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Ipt Tech AB
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Ipt Tech AB
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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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • 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
    • B60L53/30—Constructional details of charging stations
    • 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
    • B60L53/12—Inductive 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/50—Charging stations characterised by energy-storage or power-generation means
    • B60L53/53—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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/50—Charging stations characterised by energy-storage or power-generation means
    • B60L53/55—Capacitors
    • 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
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • 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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/025—
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/46—The network being an on-board power network, i.e. within a vehicle for ICE-powered road vehicles
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • 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
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/126—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention relates to a device and to a method for inductively transmitting electrical energy to movable electrical consumers (11, 11"), in particular electric vehicles having a plurality of charging stations (1, 1', 1'') for multiple consumers (11, 1"), wherein each charging station (1, 1', 1'') has a primary coil (2, 2', 2'') with an assigned power actuator element (3, 3', 3''). The invention solves the problem of making possible a means of supplying the movable electrical consumers which is simple in design, economical in terms of energy and easy to operate by virtue of the fact, for the supply with direct current or direct voltage, in the device the power actuator elements (3, 10, 3', 3'') of the charging stations (1, 1', 1'') are connected on the input side to a common direct-current or direct-voltage intermediate circuit (4), and that, for the supply with direct current or direct voltage, in the method the power actuator elements (3, 3', 3'') are fed from a common direct-current or direct-voltage intermediate circuit (4).

Description

(58) Field of Search:
INT CL B60L, H02J
Other: EPO-Internal, WPI Data (71) Applicant(s):
IPT Technologies AB (Incorporated in Sweden)
Tegeluddsv. 92, S-115 43 Stockholm, Sweden (72) Inventor(s):
Mathias Wechlin Andrew Green (74) Agent and/or Address for Service:
Baron Warren Redfern
1000 Great West Road, BRENTFORD, TW8 9DW, United Kingdom (54) Title ofthe Invention: Device and method for inductively transmitting electrical energy to movable electrical consumers
Abstract Title: Device and method for inductively transmitting electrical energy to movable electrical consumers (57) The invention relates to a device and to a method for inductively transmitting electrical energy to movable electrical consumers (11, 11), in particular electric vehicles having a plurality of charging stations (1, T, 1)for multiple consumers (11, 1), wherein each charging station (1, T, 1) has a primary coil (2, 2', 2) with an assigned power actuator element (3, 3', 3). The invention solves the problem of making possible a means of supplying the movable electrical consumers which is simple in design, economical in terms of energy and easy to operate by virtue of the fact, for the supply with direct current or direct voltage, in the device the power actuator elements (3, 10, 3', 3) of the charging stations (1, T, 1) are connected on the input side to a common direct-current or direct-voltage intermediate circuit (4), and that, for the supply with direct current or direct voltage, in the method the power actuator elements (3, 3', 3) are fed from a common direct-current or direct-voltage intermediate circuit (4).
Figure GB2556524A_D0001
Fig.l
Figure GB2556524A_D0002
WO 2017/008927 PCT/EP2016/057184
1/1
Figure GB2556524A_D0003
WO 2017/008927
PCT/EP2016/057184
Device and Method for Inductive Transmission of Electrical Energy to Mobile Electrical Consumers
The invention relates to a device for inductive transmission of electrical energy to mobile electrical consumers according to the preamble of claim 1 and to a method for inductive transmission of electrical energy to mobile electrical consumers according to the preamble of claim 12.
In the case of known devices, in particular inductive charging stations for electric vehicles, each charging station is usually supplied with electrical energy independently of the other charging stations. In this case, a charging station usually has a primary coil which can couple inductively with a secondary coil mounted on the electric vehicle. Typically the supply to the primary coil is effected through a frequency converter which is connected to a three-phase AC voltage mains supply.
This has the disadvantage that each charging station must be provided with its own frequency converter, which is undesirable due to the high cost of a frequency converter and the control which is complicated with the actuation of each frequency converter. As the charging stations are often buried or recessed in the road surface or in the ground of a surface car park, it is also necessary to provide each charging station with its own mains
WO 2017/008927 PCT/EP2016/057184 connection. This is expensive in terms of construction and insulation. In addition, the power losses are increased due to the single-phase AC or three-phase AC voltage present at the individual mains connections. In addition, if a fault occurs, the complete charging station has to be checked and if necessary dismantled, which is time-consuming and very expensive.
JP 2007-252118 A discloses a charging device for vehicles with a plurality of charging stations which are supplied from a DC voltage intermediate circuit. The batteries contained in the vehicles can be charged through the charging stations by means of a conductive connection using direct current or DC voltage. An inductive coupling is neither provided nor implied there.
DE 10 2012 212 291 Al discloses a device for electric DC rapid charging or discharging of energy storage devices in electric vehicles in which a DC/DC converter module provided for this has a DC/DC buck regulator module without galvanic isolation and a DC/DC resonant converter module for galvanic isolation. There as well provision is only made for coupling by means of a plug and socket or male and female connector solution and charging using direct current or DC voltage. An inductive coupling is neither provided nor implied there.
Therefore the underlying object of the invention is to provide a device and a method for inductive transmission of electrical energy to mobile electrical consumers which
WO 2017/008927 PCT/EP2016/057184 overcome the above-named disadvantages and allow a structurally simple, energy-saving and easily operated supply for mobile electrical consumers.
This object is achieved according to the invention by a device for inductive transmission of electrical energy to mobile electrical consumers with the features of claim 1 and a method for inductive transmission of electrical energy to mobile electrical consumers with the features of claim 12. Advantageous developments and embodiments of the invention are disclosed in the subordinate claims.
One device for inductive transmission of electrical energy to mobile electrical consumers named at the start is characterised according to the invention in that the power regulating elements of the charging stations for supply with direct current or DC voltage are connected with a common direct current or DC voltage intermediate circuit on the input side.
This means that essential parts of the device can be housed in a common station in which they are rapidly and easily accessible but protected against tampering by unauthorised persons, while allowing frequency-dependent losses to be avoided due to the DC voltage applied in the supply lines to the individual charging stations. This has proved to be particularly advantageous with a plurality of charging stations located next to one another, as in a bus depot, multi-storey car park or surface car park for example.
WO 2017/008927
PCT/EP2016/057184
In addition, the expense for the individual power regulating elements can be reduced substantially since there is no need for each of the power regulating elements to have its own intermediate circuit with expensive electronics and costly intermediate circuit storage elements. The cost of cabling and control can also be reduced through this. In addition, the use of a common intermediate circuit allows electrical energy from a vehicle to be fed back into the DC voltage intermediate circuit.
Advantageously, the intermediate circuit can be connected with a DC voltage or direct current source which preferably comprises a DC voltage mains supply and/or a direct current regulator. Furthermore, the DC voltage or direct current source can comprise a rectifier, in particular using electronic power switches. The rectifier can also be connected to a three-phase AC voltage and/or a single-phase AC voltage mains supply.
Furthermore, a mains feedback filter or power factor correction filter, which can advantageously be passive or active and/or feedback-enabled, can also advantageously be connected between the rectifier and the mains supply. Optionally, a harmonically optimised rectifier can also be used.
In one advantageous embodiment, the intermediate circuit can have an electrical energy storage unit connected to
WO 2017/008927 PCT/EP2016/057184 it which can be charged up in times in which the general current requirement is lower so that the load on the mains supply can be reduced and evened out. The charging stations can then be operated independently of the mains supply for a certain time.
Advantageously, the energy storage unit can comprise at least one accumulator, a capacitor, in particular a socalled supercap, an induction coil and/or a storage network. Preferably, at least one of the power regulating elements can be embodied to feed electrical energy back into the intermediate circuit, for example in the form of a four-quadrant regulator. Then, the power regulating elements and/or the DC voltage or direct current source and/or the energy storage units can be connected with a common control system of the device, through which the complication of control can be simplified.
A method named at the start is characterised according to the invention in that the power regulating elements for supply with direct current or DC voltage are fed from a common direct current or DC voltage intermediate circuit. Preferably, the device can then be embodied as indicated above and in the following.
Preferably, electrical energy fed back from a consumer can then be fed back into the intermediate circuit by the power regulating element of the associated charging station. As a result, this electrical energy can be reused, resulting in a saving in energy while in
WO 2017/008927 PCT/EP2016/057184 operation. Preferably the energy fed back can be stored in an electrical energy storage unit connected with the intermediate circuit and/or fed to a consumer associated with another charging station.
In one embodiment which is favourable from the operating standpoint, when requested by an electrical consumer, the power regulating element of the charging station associated with the consumer can provide the requested power individually for this consumer. This allows optimum setting from the energy standpoint so that the required energy can be supplied to each consumer without wasting energy.
Furthermore, at least one DC voltage or direct current source feeding the direct current or DC voltage intermediate circuit can be provided which supplies the total required power in the direct current or DC voltage intermediate circuit on the basis of the individual power requirements of the electrical consumers standing at the charging stations. This allows optimum setting of the energy required in the intermediate circuit so that the energy supplied is on the one hand not too little and on the other hand not too much and so not actually required.
Further particular features and advantages of the invention will become apparent from the following description of preferred exemplary embodiments given with reference to the single drawing in which:
WO 2017/008927 PCT/EP2016/057184
Fig. 1 shows a schematic block circuit diagram of a device according to the invention for inductive transmission of electrical energy to mobile electrical consumers .
Fig. 1 shows a device according to the invention for inductive transmission of electrical energy to mobile electrical consumers with three charging stations 1, 1', 1 in the present exemplary embodiment.
The charging stations 1, 1', 1 each have a charging or primary coil 2, 2', 2 respectively, which is supplied with a single-phase AC voltage by an associated inverter 3, 3', 3 in a manner known per se.
The inverters 3, 3', 3 are connected by their DC voltage side with positive and negative supply lines Z + , Z- of a DC voltage intermediate circuit 4, from which they are supplied with electrical energy.
The DC voltage intermediate circuit 4 in turn has an intermediate circuit energy storage unit 5 in which energy can be temporarily stored. Optionally, the energy storage unit 5 can also be omitted.
For its part, the energy storage unit 5 is connected with a DC voltage output, i.e. positive and negative terminals L+, L- of a rectifier 6. The rectifier 6 is supplied from an external or internal three-phase mains supply 7 known
WO 2017/008927
PCT/EP2016/057184 per se and converts this three-phase AC voltage into a DC voltage in a manner known per se.
To reduce the mains feedback of the rectifier 6, advantageously a passive or active mains feedback filter 8 or a power factor correction filter is connected between the three-phase AC voltage side of the rectifier 6 and the mains supply 7 which advantageously can also be feedback-enabled. A similar result can be achieved through a harmonically optimised rectifier, for example a 12-pulse, 18-pulse or 24-pulse rectifier.
Furthermore, both the rectifier 6 and the inverters 3,
3', 3 and optionally the energy storage unit 5 or the mains feedback filter 8 are connected with a common control unit 9 so that simple actuation is possible.
As shown in fig. 1, standing at each of the two charging stations 1, 1 there is a vehicle 10, 10 each with its own secondary coil 11, 11', which are charged in the usual way through the primary coils 2, 2.
The inverters 3, 3', 3 can conduct energy in both directions, i.e. firstly supply energy to the vehicles 10, 10 to charge them, or feed energy back into the intermediate circuit 4 from the vehicles 10, 10.
Preferably the rectifier 6 can also conduct energy in both directions, i.e. feed energy from the mains supply 7
WO 2017/008927 PCT/EP2016/057184 into the intermediate circuit 4 or feed energy from the intermediate circuit 4 back into the mains supply 7.
Likewise, the intermediate circuit 4 and the intermediate circuit energy storage unit 5 can also be optimised specifically for the single rectifier 6 and the inverters 3, 3', 3, which makes commissioning and maintenance easier. In addition, this can also lead to a reduction in the number of components, which is more favourable in spite of the as a rule higher performance of the present components compared to that of the corresponding individual components for each individual frequency converter according to the prior art. Thus, the intermediate circuit 4 and the intermediate circuit energy storage unit 5 can be of slimmer design overall than would be the case with individual frequency converters .
A large number of variations can be implemented in place of the embodiments described above.
Instead of the three-phase AC voltage mains supply 7, the mains supply 7 can also be embodied in the form of a direct current mains supply so that the rectifier 6 and optionally the mains feedback filter 8 can be omitted. However, preferably a DC converter can also be connected between the mains supply and the intermediate circuit 4 in order to match the DC voltage of the mains supply to the DC voltage desired for the intermediate circuit 4 and decouple the intermediate circuit 4 from the mains
WO 2017/008927 PCT/EP2016/057184 supply. This can be for example with a photovoltaic installation for the current supply of the device.
The mains supply 7 can also be provided by an independent or stand-alone power supply unit, for example a fuelfired emergency power generator.
Instead of the DC voltage intermediate circuit 4, a direct current intermediate circuit or a capacitor/induction coil network can be used to provide the DC voltage and the direct current for the inverters 3 , 3 ' , 3 .
Other kinds of inverters can also be provided in place of the inverters 3, 3', 3 shown in the drawing. The same also applies to the rectifier, when for example a controlled rectifier can be used which allows feedback to the mains supply 7.
WO 2017/008927 PCT/EP2016/057184
List of reference numbers
1, 1' , 1 Charging stations
2 , 2 ' , 2 Charging coils (primary coils)
3 , 3 ' , 3 Inverters
4 DC voltage intermediate circuit
5 Intermediate circuit energy storage unit
6 Rectifier
7 Mains supply
8 Power factor correction filter
9 Control unit
10, 10' Vehicles (electrical consumers)
11, 11' Secondary coils of vehicles
L+, L- Positive/negative terminals of rectifier
Z + , Z- Positive/negative terminals of intermediate circuit
WO 2017/008927
PCT/EP2016/057184

Claims (18)

Claims 1. Device for inductive transmission of electrical energy to mobile electrical consumers (11, 11), in particular electric vehicles, with a plurality of charging stations (1, 1', 1) for a plurality of consumers (11, 11), wherein each charging station (1,
1', 1) has a primary coil (2, 2', 2) with an associated power regulating element (3, 3', 3), characterised in that the power regulating elements (3, 3', 3) of the charging stations (1, 1', 1) for supply with direct current or DC voltage are connected with a common direct current or DC voltage intermediate circuit (4) on the input side.
2. Device according to the intermediate circuit one DC voltage or direct claim 1, characterised in that (4) is connected with at least current source (6).
3. Device according to claim 2, the DC voltage or direct current DC voltage mains supply and/or a regulator.
characterised in that source (6) comprises a direct current
4. Device according to claim 2 or 3, characterised in that the DC voltage or direct current source comprises a rectifier (6).
5. Device according to claim 4, characterised in that the rectifier (6) is connected to a single-phase AC mains
WO 2017/008927 PCT/EP2016/057184 supply, in particular a three-phase AC voltage mains supply (7).
6. Device according to claims 5, characterised in that a mains feedback filter or power factor correction filter (8) is connected between the rectifier (6) and the mains supply (7).
7. Device according to one of the preceding claims, characterised in that at least one of the power regulating elements is an inverter (3, 3', 3).
8. Device according to one of the preceding claims, characterised in that an electrical energy storage unit (5) is connected with the intermediate circuit (4).
9. Device according to claim 8, characterised in that the energy storage unit (5) comprises at least one accumulator, a capacitor, an induction coil and/or a storage network.
10. Device according to one of the preceding claims, characterised in that at least one of the power regulating elements (3, 3', 3) is embodied to feed electrical energy back into the intermediate circuit (4).
11. Device according to one of the preceding claims, characterised in that the power regulating elements (3, 3', 3) and/or the DC voltage or direct current source
WO 2017/008927 PCT/EP2016/057184 (6) and/or the energy storage unit (5) are connected with a common control unit (9) of the device.
12. Method for inductive transmission of electrical energy to mobile electrical consumers, in particular electric vehicles, with a plurality of charging stations (1, 1', 1) for a plurality of consumers, wherein each charging station (1, 1', 1) has a primary coil (2, 2',
2) with an associated power regulating element (3, 3', 3), characterised in that the power regulating elements (3, 3', 3) for supply with direct current or DC voltage are fed from a common direct current or DC voltage intermediate circuit (4).
13. Method according to claim 12, characterised in that electrical energy fed back from a consumer (11, 11) is fed back into the intermediate circuit (4) by the power regulating element (3, 3', 3) of the associated charging station (1, 1', 1).
14. Method according to claim 13, characterised in that the energy fed back is stored in an electrical energy storage unit (5) connected with the intermediate circuit (4) .
15. Method according to claim 13 or 14, characterised in that the energy fed back is supplied to a consumer (11, 11) associated with another charging station (1, 1',
1) .
WO 2017/008927 PCT/EP2016/057184
16. Method according to one of claims 12 to 15, characterised in that when requested by an electrical consumer (1, 10) the power regulating element (3, 3) of the charging station (1, 1) associated with the consumer (1, 10) provides the requested power individually for this consumer (1, 10).
17. Method according to one of claims 12 to 16, characterised in that at least one DC voltage or direct current source (6) feeding the direct current or DC voltage intermediate circuit (4) is provided which supplies the total required power in the direct current or DC voltage intermediate circuit (4) on the basis of individual power requirements of the electrical consumers (1, 10) standing at the charging stations (1, 1) and/or the associated power regulating elements (3, 3).
18. Method according to one of claims 12 to 17, characterised in that the device is embodied according to one of claims 1 to 11.
GB1800415.0A 2015-07-16 2016-04-01 Device and method for inductive transmission of electrical energy to mobile electrical consumers Active GB2556524B (en)

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GB201800415D0 (en) 2018-02-28
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WO2017008927A1 (en) 2017-01-19
GB2556524B (en) 2021-05-05
DE102015111553A1 (en) 2017-01-19

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