WO2010049215A2

WO2010049215A2 - Energy generation device for the mobile supplying of a vehicle with electric energy

Info

Publication number: WO2010049215A2
Application number: PCT/EP2009/062105
Authority: WO
Inventors: Ellen Mailaender; Klaus Ries-Mueller
Original assignee: Robert Bosch Gmbh
Priority date: 2008-10-27
Filing date: 2009-09-18
Publication date: 2010-05-06
Also published as: DE102008043205A1; WO2010049215A3

Abstract

The invention relates to an energy generation device for the mobile supplying of a vehicle with electric energy, comprising an energy generation unit (101) for generating energy, wherein the energy generation unit (101) is further configured in order to feed electric energy directly to an energy supply network, particularly to a public energy supply network.

Description

description

title

Power generating device for mobile supply of a vehicle with e- lectric energy

State of the art

The present invention relates to the field of power generation in vehicles, especially in electric motor driven vehicles.

For energy supply in vehicles usually vehicle batteries are used, which can be supplied with energy, for example by means of an internal combustion engine generator or solar cell module. In the future, it is expected that more vehicles will be equipped with larger electrical energy storage systems. For example, electric vehicles can expect outputs of more than 5 kWh and hybrid vehicles more than 0.5 kWh. To charge such energy storage in the future therefore powerful mobile power generation concepts and intelligent energy management are necessary. For example, when equipping vehicles with solar cells, the excess solar energy can also be used, for example, for directly supplying an electric compressor of an air-conditioning system. As a result, additional energy is provided for cooling, in particular with increased solar radiation, whereby the vehicle battery is relieved. This is particularly advantageous in electric vehicles, because at high temperatures much of the energy stored in the vehicle battery must be used for air conditioning. Furthermore, the direct current generated by means of the solar cells can also be used directly for charging the vehicle battery, which is cheaper than a direct power generation by means of an internal combustion engine due to its poor efficiency.

Disclosure of the invention The invention is based on the recognition that the mobile generated, excess energy can also be fed into a power supply network, for example in a public power grid. A resulting reimbursement reduces the costs of the mobile power generation device, for example a solar cell module. In addition, the public power grid can be advantageously relieved, for example, at peak load.

In one aspect, the invention relates to a power generating device for powering a vehicle with electrical energy. The power generating device comprises power generating means for generating power, wherein the power generating means is configured to direct electrical power directly, i. without a temporary storage in a vehicle battery to feed into a power grid. This advantageously implements a direct and loss-reduced coupling between the energy generating device and the energy supply network.

According to one embodiment, the energy generating device comprises an internal combustion engine driven generator, for example a range

Extender. Furthermore, a solar cell module with a plurality of solar cells, which cover, for example, at least a portion of a vehicle surface, can be used for energy generation. Preferably, both the generator and the solar cell module can be used, whereby advantageously a distributed power generation can be realized.

According to one embodiment, the energy generating device is designed to supply, for example, a vehicle battery or a vehicle drive or a vehicle consumer with electrical energy, whereby a multiple use of the energy generating device is achieved in a particularly advantageous manner.

According to one embodiment, the energy generating device is designed to generate electrical energy as a function of a state of charge of a vehicle battery, so that it can advantageously be ensured that only excess energy is fed into the power grid and that the vehicle battery is always preferably supplied with energy.

According to one embodiment, an energy meter is provided for detecting an amount of energy that can be fed into the energy supply network, as a result of which, for example, the advantageous reimbursement claim can be detected.

According to one embodiment, the energy generating device comprises an inverter, which enables coupling of the energy generating device to a power supply network in a particularly simple and advantageous manner.

According to one embodiment, the energy generating device is further configured to synchronize a phase or a frequency of a voltage that can be fed into the energy supply network or a current that can be fed into the energy supply network with a phase or a frequency of the energy supply network. This synchronization can be carried out, for example, separately or in the above-mentioned inverter, whereby a direct energy feed into the energy supply network is made possible in a particularly advantageous manner.

According to a further aspect, the invention relates to a vehicle, in particular a hybrid vehicle, with the power generating device according to the invention.

According to a further aspect, the invention relates to a stationary energy charging station for stationary supply of a vehicle with electrical energy. The stationary energy charging station comprises an electrical connection to which the energy generating device according to the invention for feeding electrical energy into a power supply network and / or for supplying a vehicle battery with electrical energy can be connected. Thus, a simple and advantageous coupling to the power grid is possible.

According to one embodiment, the stationary energy charging station is provided to receive electrical energy in the form of a DC voltage or a DC current or an AC voltage or an AC current and to feed into the power grid. Furthermore, the stationary energy charging station can be provided with an inverter. This advantageously ensures that the direct current generated, for example, by means of solar cells can also be fed directly into the stationary energy charging station.

According to one embodiment, the energy charging station is provided to synchronize a phase or a frequency of a voltage which can be fed into the energy supply network or a current which can be fed into the energy supply network with a phase or a frequency of the energy supply network. As a result, a cost-effective adaptation to the energy supply network is achieved in an advantageous manner.

According to one embodiment, the stationary energy charging station is provided to detect an amount of energy that can be fed into the energy supply network.

As a result, a monetary refund can advantageously be recorded even if the respective mobile energy generating device does not have its own energy meter.

According to one aspect, the invention relates to a method for the mobile generation of energy for supplying a vehicle with electrical energy by means disposed in the vehicle power generating device, in particular an internal combustion engine driven generator or a solar cell module, and feeding the generated by means of the vehicle disposed in the energy generating device Energy in a power grid.

Further advantageous method steps result directly from the functionality of the power generation device according to the invention.

According to one aspect, the invention relates to a method for stationary supply of a vehicle with electrical energy with generation of electrical energy according to the method according to the invention for the mobile generation of electrical energy and feeding this energy into a power supply network via a stationary energy charging station. Further advantageous method steps result directly from the functionality of the stationary energy charging station according to the invention. Further embodiments will be explained with reference to the accompanying drawings. Show it:

Fig. 1 is a block diagram of a power generation device;

FIG. 2 shows a vehicle with a power generation device; FIG.

3 shows a hybrid drive;

4 shows a vehicle with a power generation device;

5 shows a stationary charging station; and

Fig. 6 shows a connection of a solar cell module to a power grid.

Fig. 1 shows a block diagram of a power generating device for supplying a vehicle with electrical energy for mobile use. The energy generating device comprises an energy generating device 101, which is designed to feed electrical energy directly into a power supply network. For this purpose, the energy generating device comprises, for example, a generator driven by an internal combustion engine, for example a range extender, or a solar cell module 103. The mobile energy generated can be fed into the public energy supply network via an energy meter 105, an inverter 107 and a connection 109. The inverter 107 is provided, for example, to convert the example, solar-generated direct current into an alternating current whose phase and frequency corresponds to the phase and the mains frequency.

In addition to the solar cells, internal combustion engine-driven generators, so-called range extenders, can preferably also be used for mobile power generation, as illustrated in FIG. 2 by means of an electric motor-driven vehicle with an electric motor 201, which can apply 120 kW of power, for example. The electric motor 201 is, for example, by a vehicle battery 203 via an inverter 205 with Energy supplied. The vehicle battery 203 is, for example, a lithium-ion battery having a power of 16 kWh. In addition, a generator 207 is provided with a power of, for example, 53 kW, which is driven by internal combustion engine by means of an additional internal combustion engine 209 with, for example, 60 kW power. Further, a separate tank with a capacity of, for example, 45 liters for providing fuel for the additional internal combustion engine 209 is provided. The generator 207 supplies the vehicle battery 203 via an inverter 213 or the electric motor 201 via the inverter 205. Furthermore, a rectifier / inverter 215 is provided which can be connected to the vehicle battery 203 and to the rectifier 213. The rectifier / inverter 215 is further connected to an externally accessible terminal 217. In one mode of operation, the rectifier / inverter 215 may act as a rectifier, such that AC power may be provided via the terminal 217 for injection into the vehicle battery 203. In addition, the rectifier / inverter 215 may be provided to convert the equal energy generated at the output of the rectifier 213 into alternating energy and to feed it via the terminal 217 in the public power grid.

Fig. 3 shows a hybrid drive with a battery 301, which via an inverter

303 is coupled to an electric motor 305 with, for example, 78 kW. Furthermore, a generator 307 is provided, which is driven, for example by means of an internal combustion engine 309 with, for example, 28 kW and used as a range extender. The generator 307 supplies the vehicle battery 301 with electrical energy via the inverter 303. The internal combustion engine 309 is supplied with fuel, which is provided in a tank 31 1.

The generator 307 is designed, for example, for an efficiency of, for example, 90% with a power of at least 28 kW. Depending on a state of charge of the vehicle battery 301, the excess energy which can be generated by means of the generator 309 can be fed, for example, into a public energy supply network. In addition to the internal combustion engine 309 shown in FIG. 3, solar cells may also be provided to generate solar energy, which may likewise be provided for charging the vehicle battery 301 or for feeding into the energy supply network. So For example, with a battery capacity of between 7 and 25 kWh, an electromotive radius between 32 and 104 km can be achieved, with the vehicle battery 301 having a weight between 35 and 125 kg.

FIG. 4 shows a vehicle having a power generating device incorporating a

Solar cell module 401 with solar cells and an inverter 403, whose output is connected to a terminal 405 has. The solar cell module 401 is connected to a battery 409 via a DC / DC converter 407 (DC: Direct Current). Furthermore, an additional generator 411 is provided, which is connected via a rectifier 413 to the battery 409. In addition, a terminal 415 is provided, to which the battery 409 is connected via a rectifier 417.

As shown in FIG. 4, the power generated by means of the solar cell module 401 can be fed into a public power grid depending on a state of charge of the vehicle battery and / or an ambient temperature or vehicle interior temperature, for example, a remuneration of about 0.5 € / kWh can be expected. In the long term, solar power generation is expected to become even more cost-effective than fossil-fueled electricity, especially in southern countries.

The vehicle illustrated in FIG. 4 can be completely or partially electrically driven, wherein at least part of the energy required for this purpose can be provided by the vehicle battery 409. The additional generator 411 can be used as a range extender. Furthermore, the generator 411 can be connected to the connection 405 via, for example, a further inverter and be provided for feeding energy into the public energy supply network.

In addition, the vehicle outer surface can be at least partially coated with solar cells of the solar cell module 401, wherein the solar power generated via the DC / DC converter 407 in the vehicle battery 409 or directly to a vehicle user, such as an electric air compressor can be supplied. However, the solar generated power can also Ü over the inverter 403, via the port 405 and for example via a connection, not shown in Fig. 4 are fed into a public power grid. Thus, for example, in the event of a vehicle standstill and an air conditioning request when a threshold value is exceeded by the ambient or interior temperature for air conditioning, the solar power generated by the solar cell module 401 can be used. If, for example, no air conditioning is requested and the battery charge state falls below a predetermined threshold value, the solar power generated by the solar cell module 401 can be used to charge the battery. If, on the other hand, the battery state of charge exceeds the predetermined threshold value and, for example, no air conditioning is requested, then the device can be used by means of the

Solar cell module 401 generated solar power can be fed directly into the power grid. In addition, the power can be generated by means of the internal combustion engine driven generator 41 1 and fed into the public power grid. Here, the fuel used to drive the internal combustion engine driven generator 411 may be, for example, a biological fuel such as ethanol, whereby environmentally sound power generation is possible. According to a development, the vehicle drive can also be used as a combined heat and power plant.

Fig. 5 shows a stationary power charging station 501, which is an electrical

Connection 503, to which a power generating device for feeding electrical energy can be connected in a power grid. The stationary energy charging station 501 is, for example, firmly integrated in the local infrastructure or in the infrastructure of the energy supply network.

6 shows by way of example a connection of a solar cell module 601 to an energy supply network 603 via a stationary energy charging station with an inverter 605, which is connected to the energy supply network 603 via an energy meter 607. The energy meter 607 may, for example, for detecting a through the solar cell module 601 in the power grid

603 fed amount of energy and at the same time be provided for detecting an amount of energy absorbed by a home distribution network 609. Thus, the inventive concept can be seamlessly embedded in a possibly existing energy infrastructure.

Claims

claims

A power generating device for powering a vehicle with electric power, comprising:

an energy generating device (101) for generating energy, wherein the energy generating device (101) is further configured to feed electrical energy directly into a power supply network, in particular into a public power supply network.

2. Energy generating device according to claim 1, wherein the energy generating device (101) has an internal combustion engine driven generator or a solar cell module (103), in particular a solar cell module with at least one attachable to a vehicle outer surface solar cell.

3. The power generating device according to claim 1, wherein the power generating device is further configured to supply a vehicle battery or a vehicle drive or a vehicle user with electrical energy.

4. Power generating device according to one of the preceding claims, wherein the energy generating device (101) is further configured to generate electrical energy as a function of a state of charge of a Batteries battery or to feed into the power grid.

5. A power generation apparatus according to any one of the preceding claims, further comprising an energy counter (105) for detecting the amount of energy supplied to the power grid.

A power generation apparatus according to any one of the preceding claims, wherein said power generation means (101) comprises an inverter (107).

7. Energy generating device according to one of the preceding claims, wherein the energy generating device (101) is further adapted to synchronize a phase or a frequency of a feedable voltage or a current can be fed into the power grid with a phase or frequency of the power supply network.

8. A vehicle with an electric or internal combustion engine drive and the energy generating device according to one of claims 1 to 7.

9. Stationary energy charging station for stationary supply of a vehicle with electrical energy, comprising:

an electrical connection (503) to which a power generating device according to any one of claims 1 to 7 for feeding electrical energy in a

Energy supply network, in particular in a public power grid, via the stationary energy charging station can be connected.

10. Stationary energy charging station according to claim 9, which is designed to receive electrical energy in the form of a DC voltage or a DC current or an AC voltage or an AC current.

1 1. Stationary energy charging station according to claim 9 or 10, further comprising an inverter.

12. Stationary energy charging station according to one of claims 9 to 1 1, which is further adapted to synchronize a phase or a frequency of a feedable voltage in the power grid or a feedable power grid into the power supply to a phase or frequency of the power grid.

13. Stationary energy charging station according to one of claims 9 to 12, which is further configured to detect an energy quantity that can be fed into the energy supply network.

14. A method for mobile generating electrical energy for powering a vehicle, comprising:

Generating electrical energy by means disposed in the vehicle e- nergieerzeugungseinrichtung, in particular a combustion engine driven generator or a solar cell module; and

Direct feeding of the energy generating device arranged in the vehicle generates energy in a power supply network, in particular a public power supply network.

15. A method for stationary powering a vehicle with electrical energy, comprising:

Feeding the electrical energy generated by the method according to claim 14 into a power supply network, in particular into a public power supply network, by means of a stationary energy charging station for stationary supply of a vehicle with electrical energy.