EP4157669A1

EP4157669A1 - Charging station

Info

Publication number: EP4157669A1
Application number: EP21730859.2A
Authority: EP
Inventors: Alexander Sohl; Inès Adler
Original assignee: Me Energy GmbH
Current assignee: Me Energy GmbH
Priority date: 2020-06-02
Filing date: 2021-06-01
Publication date: 2023-04-05
Also published as: MX2022015273A; BR112022024732A2; DE102020114676A1; US20230211688A1; WO2021245084A1

Abstract

The invention relates to a method for generating and delivering charging current for an electric vehicle in a charging station, comprising the method steps of: generating kinetic energy; supplying a first generator with the generated kinetic energy; supplying a second generator with the generated kinetic energy; converting the generated kinetic energy into electrical energy by means of the first generator; and converting the generated kinetic energy into electrical energy by means of the second generator.

Description

LA D E SA U L E

The invention relates to a method for generating and delivering charging current for an electric vehicle in a charging station with the method steps of generating kinetic energy, feeding a first generator with the generated kinetic energy and converting the generated kinetic energy into electrical energy by means of the first generator, as well as a corresponding device.

State of the art

The spread of electric vehicles that are operated with an electric motor is accompanied by a functioning infrastructure for charging the electric vehicles. In addition to charging at the home socket, users of electric vehicles must also be given the opportunity to obtain energy in the public sector. Given the range of electric vehicles currently available, it is necessary that the vehicles can also be charged outside of the domestic environment. Therefore, charging stations must be made available in public areas in order to ensure constant availability of energy for electric vehicles through a supply network.

Charging columns are known to recharge the traction battery of a plug-in vehicle - hybrid or electric vehicle - as described, for example, in DE 102009016 505 A1. The charging station itself is connected to a power rail for the power supply. An existing power grid has a connection element for outputting electrical energy to an electric vehicle.

It is therefore the object of the present invention to provide a method for charging electric vehicles with which charging is possible more cost-effectively. A further object of the present invention is to provide a charging column for charging electric vehicles that can be operated more cost-effectively.

The object is achieved by means of the method for generating and delivering charging current for an electric vehicle in a charging column according to claim 1. Further advantageous embodiments of the invention are set out in the subclaims.

The method according to the invention for generating and delivering charging current for an electric vehicle in a charging station has three method steps: In the first method step, kinetic energy is generated. The kinetic energy occurs in particular as a translational and / or rotational movement and takes place in an energy conversion device. The energy conversion device is, for example, an internal combustion engine. The internal combustion engine is usually a piston internal combustion engine, other internal combustion engines such as a Wankel engine or a turbine are also possible. A suitable choice of the starting time of an internal combustion engine significantly reduces the charging process for a user. In the second process step, a first generator is fed with kinetic energy from the energy conversion device. The first generator is coupled to the energy conversion device and is driven by it. In the third method step, the kinetic energy generated by the energy conversion device is converted into electrical energy by means of the first generator. The first generator driven by the energy conversion device generates a current that is mainly used to charge an electric vehicle.

According to the invention, a second generator is fed with kinetic energy from the energy conversion device. The second generator converts the kinetic energy into electrical energy. The second generator is also coupled to the energy conversion device and is driven by it. The second The generator generates electricity that is primarily used to operate the charging station.

Energy conversion devices in the context of this invention are essentially combustion engines that can be operated with different fuels. They convert the energy of a liquid and / or gaseous energy carrier into kinetic energy. Fuel cells, wind turbines and / or solar cells are also understood as energy conversion devices. Furthermore, rectifiers and / or inverters are also understood as energy conversion devices.

Due to this advantageous process, the charging station can be operated completely independently; it is not necessary to connect the charging station to an external energy source, e.g. an existing power grid. This significantly reduces the costs for installing the charging station compared to charging stations operated by medium-voltage networks, for example. At the same time, the location of the charging station can be chosen more flexibly, a power connection in the immediate vicinity is not necessary. This property is particularly important in rural areas.

In a further development of the invention, the first generator and the second generator are fed with kinetic energy from the same energy conversion device. The kinetic energy generated by the energy conversion device is then converted into electrical energy by the first generator and by the second generator.

In a further embodiment of the invention, the first generator generates an electrical current with a voltage of more than 100 V. The current generated by the first generator is usually a three-phase current with a voltage of 400 V. This allows the charging station to be designed for rapid charging of electric vehicles . In a further embodiment of the invention, the second generator generates an electrical current with a voltage of less than 250 V. Electrical voltages of 12 V, 24 V or 48 V are usually required to operate the components installed in the charging station. An electrical voltage of 220 V generated by the second generator enables electrical devices to be operated such as are common in households. Due to the method according to the invention, the charging column can therefore also be used as a domestic power generator in addition to charging electric vehicles.

In a further development of the invention, 100% of the electrical current generated by the first generator is used to charge an electric vehicle. The power output of the first generator is scaled in such a way that an electric vehicle can be charged within a reasonable period of time. This power output is advantageously at least 3.7 kW, and at least 22 kW are required for rapid charging.

In a further embodiment of the invention, the electricity generated by the second generator is used to charge an energy store arranged in the charging station. The electrical energy storage device is usually a rechargeable battery, e.g. a Li-ion battery or an acid battery. Such an energy storage device has a high energy density, is technically mature and available.

In a further embodiment of the invention, the energy store (the battery?) Is arranged in the charging station. The rechargeable battery, e.g. a Li-ion battery, requires so little space, depending on its energy content (capacity), that it can be arranged in a charging station.

In a further embodiment of the invention, the first generator is fed with the generated kinetic energy via a first coupling element. The first The coupling element usually has a disengageable clutch and a toothed belt. A connection using a V-belt or chain is also possible.

In a further development of the invention, the second generator is fed with the generated kinetic energy via a second coupling element. The second coupling element advantageously has a low-maintenance belt drive without an intermediate coupling.

In a further embodiment of the invention, the second coupling device is arranged separately from the first coupling arrangement. Therefore, each coupling element is separately accessible and easy to maintain and repair in the event of maintenance.

In a further embodiment of the invention, the electricity generated by the second generator is used to operate an HMI unit, a controller and / or a communication unit. The HMI unit, the controller and / or the communication unit are arranged in the charging station. The data that are important for a user, such as charging current, charging time and costs of the charging process, are called up and displayed by means of the HMI unit. In addition, a user can initiate or end the charging process and pay. Above all, the power unit enables the conversion of electrical energy in relation to the voltage form (e.g. direct or alternating voltage), the level of voltage and current as well as the frequency.

In a further embodiment of the invention, the electrical current generated by the second generator is used to charge an electric vehicle. In addition to supplying the components of the charging station with electrical energy, the electrical energy generated by the second generator can also be used to charge an electric vehicle. The charging process can be accelerated by feeding more electrical power into the electric vehicle. As an alternative or in addition, the energy store (battery) of the charging station, which is charged by the second generator, can be used for the charging process. The object is also achieved by the charging column according to the invention, which is suitable for charging electric vehicles and is intended for this purpose, according to claim 12.

The charging column according to the invention, which is suitable for charging electric vehicles, has an energy conversion device and a first generator connected to the energy conversion device. The energy conversion device is, for example, an internal combustion engine. The internal combustion engine is usually a piston internal combustion engine, other internal combustion engines such as a Wankel engine or a turbine are also possible. The first generator is coupled to the energy conversion device and is driven by it. The first generator driven by the energy conversion device generates a current that is mainly used to charge an electric vehicle.

According to the invention, a second generator is connected to the energy conversion device. The second generator is also coupled to the energy conversion device and is driven by it. The second generator generates electricity that is primarily used to operate the charging station. Due to this advantageous arrangement of the generators, the charging column according to the invention can be operated completely independently; a connection of the charging column to an external energy source, e.g. an existing power grid, is not necessary. This significantly reduces the costs for installing the charging station compared to charging stations operated by medium-voltage networks, for example. At the same time, the location of the charging station can be chosen more flexibly, a power connection in the immediate vicinity is not necessary. This property is particularly important for the use of the charging station according to the invention in rural areas.

In a further embodiment of the invention, the first generator and the second generator are each connected to the energy conversion device via separate coupling elements. The first coupling element has usually a disengageable clutch and a toothed belt. A connection using a V-belt or chain is also possible. The second coupling element advantageously has a low-maintenance belt drive without an intermediate coupling. Due to the separate arrangement, the coupling elements are separately accessible and, in the event of maintenance, must be serviced or repaired separately.

In a further embodiment of the invention, the first generator is connected to the connection for a charging cable via a power line which is suitable and intended to conduct the generated power. The electrical energy generated by the first generator is used to charge the energy storage device of an electric vehicle. The connection between the charging station and the energy storage device of the electric vehicle is established by means of the charging cable.

In a further embodiment of the invention, the first generator is connected to one or more charging cable connections exclusively via one or more power lines that are suitable and intended to conduct the generated power. The connection between the charging station and the energy storage device of an electric vehicle to be charged is made by means of a charging cable. Several connections for charging cables enable several electric vehicles to be charged at the same time. The electrical power generated by the first generator is then divided between several electric vehicles.

In a further embodiment of the invention, a first rectifier is connected between the first generator and the charging cable connection. The first generator usually generates an alternating current. However, a battery storage device of an electric vehicle requires a direct current for charging. A rectifier arranged in the charging station according to the invention means that no rectifier is necessary in the electric vehicle to be charged, which means that the costs and weight of the electric vehicle can be reduced. In a further embodiment of the invention, the second generator is connected to a battery via a power line which is suitable and intended to conduct the generated power. The charging station is therefore operated independently using the electrical energy stored in the battery. It is not necessary to connect the charging station to an external energy source, for example a power line, and this reduces the costs for installing the charging station.

In a further embodiment of the invention, a second rectifier is connected between the second generator and the battery. The electrical energy stored in the battery is sent as direct current to the energy storage device of the electric vehicle to be charged. The rectifier functions in particular as a power unit that sets the charge status of the electric vehicle to be charged, the charging voltage and the charging current of the charging station. The charging column according to the invention charges an electric vehicle to be charged not only with the electrical energy generated by the generator unit, but also additionally with the electrical energy stored in the battery. This significantly shortens the charging time. Alternatively, a second electric vehicle can be charged in parallel.

In a further development of the invention, the battery is connected to the energy conversion device via a power line, the power line being provided and suitable for supplying the motor with electrical energy. The motor requires electrical energy to start and operate. The charging station is therefore operated independently using the electrical energy stored in the battery. It is not necessary to connect the charging station to an external energy source, e.g. a power line, which reduces the costs of installing the charging station.

In a further embodiment of the invention, the second generator is connected to an HMI unit, a communication unit and / or a controller via a power line which is suitable and intended to conduct the generated power. The idle state (stand-by mode) of the charging station requires a small amount of energy to be supplied to the HMI unit and the power unit in order to ensure functionality. This Energy is supplied by the battery. The HMI unit and the power unit are also started and operated with stored electrical energy in the battery. The charging station is therefore operated independently using the electrical energy stored in the battery. It is not necessary to connect the charging station to an external energy source, for example a power line, and this reduces the costs for installing the charging station.

In a further embodiment of the invention, the battery is connected to the first rectifier via an inverter and a power line. The electrical energy stored in the battery is sent as direct current to the inverter, which converts the direct current into an alternating current. The rectifier connected afterwards converts the alternating current back into direct current. The inverter and rectifier both function as a power unit that set the charge status of the electric vehicle to be charged, the charging voltage and the charging current of the charging station.

In a further embodiment of the invention, the battery is connected to the charging cable connection via a direct current converter and a power line. The electrical energy stored in the battery is sent as direct current to the energy storage device of the electric vehicle to be charged. The rectifier functions in particular as a power unit that sets the charge status of the electric vehicle to be charged, the charging voltage and the charging current of the charging station. The rectifier can also be a power pack or have the functionality of a power pack. The charging column according to the invention thus charges an electric vehicle to be charged not only with the electrical energy generated by the generator unit, but also additionally with the electrical energy stored in the battery. This significantly shortens the charging time. Alternatively or additionally, a second electric vehicle can be charged in parallel.

In a further development of the invention, the first generator is intended and suitable for generating current with a voltage greater than 100V. The one from the first generator The electricity generated is usually a three-phase current with a voltage of 400 V. This enables the charging station to be designed for rapid charging of electric vehicles.

In a further embodiment of the invention, the second generator is intended and suitable for generating current with a voltage of less than 250V. For the operation of the components built into the charging station, electrical voltages of 12 V, 24 V or 48 V are usually required. An electrical voltage of 220 V generated by the second generator enables electrical devices to be operated such as are common in households. In addition to charging electric vehicles, the charging station can also be used as a domestic power generator.

Exemplary embodiments of the method according to the invention for charging electric vehicles and the charging column according to the invention are shown in the drawings in a schematically simplified manner and are explained in more detail in the description below.

Show it:

Fig. 1: An embodiment of the charging station according to the invention.

Fig. 2: A diagram of an embodiment of the energy distribution during the

Charging process.

Fig. 3: Another embodiment of the charging station according to the invention.

4: A diagram of a further exemplary embodiment of the energy distribution during the charging process.

Fig. 5: Another embodiment of the charging station according to the invention.

6: A diagram of a further exemplary embodiment of the energy distribution during the charging process.

Fig. 7: Another embodiment of the charging column according to the invention. Fig. 1 shows a schematic view of the charging station 1 according to the invention showing the connections by means of power lines between the components within the charging station 1. The charging station 1 according to the invention has a nominal power of 150 kW in this embodiment, ie an electric vehicle can be charged with 150 kW charging power. In this exemplary embodiment, the electrical energy for delivery to an electric vehicle is generated in the charging station 1 by an internal combustion engine M as an energy conversion device. The internal combustion engine M is here a piston internal combustion engine with a shaft power of 180 kW, but other designs such as a Wankel engine or turbine are also possible. The internal combustion engine M is advantageously operated with methanol or ethanol or a mixture of methanol and ethanol. The operating materials can be produced climate-neutrally from vegetable raw materials, their storage and handling is comparable to the storage of conventional gasoline and therefore does not require any extraordinary safety measures for safe storage and transport.

Such a fuel typically has a usable energy content of 6.28 kWh / i and is the primary energy source of the charging column 1. The fuel is stored in the charging column 1 in a tank T. The internal combustion engine M is connected to the first via the first coupling element KE1 Generator GE1 connected. The coupling element KE1 usually has a disengageable clutch and a toothed belt. A connection using a V-belt or chain is also possible. The first generator GE1 is advantageously a three-pole three-phase synchronous generator that is self-excited by permanent magnets. Such a generator does not require any energy to generate the magnetic field and therefore has a higher efficiency of approx. 98% compared to separately excited generators. In addition, a synchronous generator can generate a specifically adjustable power in order to compensate for the reactive power that inevitably occurs in the charging station 1.

The internal combustion engine M drives the first generator GE1 by rotation. The kinetic energy generated by the internal combustion engine M is thus converted by the first generator GE1 into electrical energy, into an alternating current. The first Generator GE1 generates an electrical power of 150 kW at a voltage of more than 100 V according to the invention, 400 V in this and the following exemplary embodiments. The alternating current generated by the generator GE1 is converted into a direct current in the rectifier GR1. The internal combustion engine M is connected to a second generator GE2 via the second coupling element KE2, which is arranged separately from the first coupling element KE1. The second coupling element KE2 has a low-maintenance belt drive without a clutch. The second generator GE2, like the first generator GE1, is driven by the rotation of the internal combustion engine M, and the kinetic energy of the internal combustion engine M is converted into electrical energy. Like the first generator GE1, the second generator GE2 is a self-excited synchronous generator with a high degree of efficiency. The second generator GE2 generates a direct current with a voltage of up to 250 V according to the invention, in this embodiment of 24 V.

The HMI unit H has a display and operating device on which the data that are important for a user, such as charging current, charging duration and costs of the charging process, are called up and displayed. In addition, a user can initiate or end the charging process and pay. Different payment systems are possible, e.g. using different credit cards. Other payment systems are also possible, e.g. via a mobile device (smartphone). The rechargeable battery B (accumulator) has a capacity of 50 kWh and is charged by the second generator GE2 while the electric vehicle is being charged. At the same time, the battery B supplies the control unit S, the communication unit K and the HMI unit H with electrical energy for operation and the internal combustion engine M with electrical energy for starting and operating.

The charging column 1 also has the connection device A for one or more charging cables with which an electric vehicle to be charged is charged. The charging cable also has a data line that establishes a data connection between the control unit S and the electric vehicle. Communication with the battery of the electric vehicle to be charged is established via the data line and the required data such as State of charge, charge voltage and charge current queried. The control unit S sets the parameters of the charging current on the basis of this data. The charging column 1 is connected to the operator of the charging column 1 and a plurality of further charging columns via the communication unit K, which establishes an Internet connection, for example with a cloud storage device.

All of these components of the charging station 1 mentioned here - tank T, internal combustion engine M, the coupling elements KE2, KE2, first generator GE1, second generator GE2, rectifier GR, connection device A, battery B, HMI unit H, communication unit K, control unit S - are advantageously arranged in the charging station 1 itself. For this purpose, the charging column 1 has a housing that protects the components within the charging column 1 from the effects of the weather and damage.

The method for generating and charging an electric vehicle begins with the generation of kinetic energy by the energy conversion device, in this exemplary embodiment the internal combustion engine M. , the communication unit K and the HMI unit H are ready for operation. These units H, K, S are supplied with electrical energy by the battery B. The control unit S, the communication unit K and the HMI unit H require 70 W for stand-by operation.

The method according to the invention is initiated by a starting process, in this exemplary embodiment by connecting the charging cable to the electric vehicle to be charged. By means of a plug connection, the charging station 1 and the electric vehicle are connected through the charging cable connected to the connection device A. The charging station 1 is put into an operating state by the starting process. To do this, the energy conversion process is started first. A starting device installed on the internal combustion engine M starts the internal combustion engine M, which is supplied with fuel from the tank T. For the start and operation of the internal combustion engine M is a electrical power of 500 W is required, which is made available by the battery B.

The method according to the invention can also be initiated by sensors, e.g. a radar sensor, which detects the electric vehicle to be charged at the parking space assigned to the charging column 1. It is also possible for a user to register in advance using a mobile device, e.g. a smartphone with a suitable app, so that the method according to the invention starts in a specified time window. A combination of the options mentioned is also conceivable. The first generator GE1 coupled to the internal combustion engine M is driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the first generator GE1 is used exclusively and 100% for charging the electric vehicle. In alternative applications, some of the energy generated by the first generator GE1 can also be used to charge the energy store. The second generator GE2, which is also coupled to the internal combustion engine M, is also driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the second generator GE2 is used to charge the energy store arranged in the charging column 1 and to operate the HMI unit H, the controller S and the communication unit K during the charging of the electric vehicle. The electric vehicle is then charged using the electrical energy generated by the generator GE1. Usually, a user gives a start command for charging via the HMI unit H.

The electric vehicle is supplied with electrical energy through the charging column 1 through the charging cable connected to the connection device A, in this exemplary embodiment with a maximum of 150 kW. After the electric vehicle has been charged, the process of energy conversion is ended, the internal combustion engine M is stopped and the process of charging the electric vehicle is ended. So there is no more electrical energy flowing from the charging station 1 to the electric vehicle. The charging station 1 is put back into the idle state. An exemplary embodiment for the energy flow during the charging process between the components of the charging station 1 is shown in FIG. 2. The internal combustion engine M as an energy conversion device generates a nominal output of 180 kW, which is transmitted to the generators GE1 and GE2. The first generator GE1 generates an electrical current with an output of 150 kW, the second generator GE2 an electrical output of 6 kW. The 30 kW power output generated by the second generator GE2 is fed into the battery B in order to charge it. The control unit S, the communication unit K and the HMI unit H are supplied with power with 70 W of the power generated by the first generator GE1. 150 kW therefore get into the rectifier GR. The alternating current generated by the first generator GE1 is converted into direct current in the rectifier GR. The direct current (150 kW) generated by the rectifier GR is fed into the charging cable arranged on the connection device A. The battery B with a capacity of 50 kWh supplies the control unit S, the communication unit K and the HMI unit H with a total of 70 W and the combustion engine M with 500 W.

The charging station 1 according to the invention is thus supplied with energy, as explained, by the electrical energy stored in the battery B, the generator GE2 feeding it, and ultimately by the fuel stored in the tank T as the primary energy source. The charging column 1 according to the invention therefore does not require an external energy source, e.g. a power connection, for charging an electric vehicle. Experience has shown that the costs of connecting to an external power source require a lot of effort and are associated with high costs. The charging column 1 according to the invention is more economical to install than, for example, a charging column that draws its primary current from the available electricity network.

The method according to the invention is initiated by a start process. Up to this point in time, the charging station 1 is in an idle state (stand-by) in which only the control unit S, the communication unit K and the HMI unit H are ready for operation. The charging station 1 is put into an operating state by the starting process. To do this, the process of energy conversion is first used the energy conversion device, in this embodiment an internal combustion engine, started. A starting device installed on the internal combustion engine M starts the internal combustion engine M, which is supplied with fuel from the tank T. The first generator GE1 coupled to the internal combustion engine M is driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the first generator GE1 is used exclusively and 100% for charging the electric vehicle.

The second generator GE2, which is also coupled to the internal combustion engine M, is also driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the second generator GE2 is used to charge the energy store arranged in the charging column 1 and to operate the HMI unit H, the controller S and the communication unit K during the charging of the electric vehicle. The electric vehicle is then charged using the electrical energy generated by the generator GE1. Usually, a user gives a start command for charging via the HMI unit H. The electric vehicle is supplied with electrical energy through the charging column 1 through the charging cable connected to the connection device A, in this exemplary embodiment with a maximum of 150 kW. After the electric vehicle has been charged, the process of energy conversion is ended, the internal combustion engine M is stopped and the process of charging the electric vehicle is ended. So there is no more electrical energy flowing from the charging station 1 to the electric vehicle. The charging station 1 is put back into the idle state.

3 shows a schematic view of the charging column 1 according to the invention, showing the connections by means of power lines between the components within the charging column 1. In this exemplary embodiment, the charging column 1 has an inverter WR. In the charging station 1, the electrical energy for delivery to an electric vehicle is generated by the internal combustion engine M as an energy conversion device. The internal combustion engine M is a piston internal combustion engine with a Shaft power of 70 kW, the internal combustion engine M is operated with methanol or ethanol or a mixture of methanol and ethanol. The fuel is stored in the charging station 1 in the tank T.

The internal combustion engine M drives the first generator GE1 by rotation. The kinetic energy generated by the internal combustion engine M is thus converted by the first generator GE1 into electrical energy, into an alternating current. The internal combustion engine M is connected to the first generator GE1 via the first coupling element KE1. The first generator GE1 generates an electrical power of 50 kW. The alternating current generated by the first generator GE1 is converted into direct current in the rectifier GR. The internal combustion engine M is connected to a second generator GE2 via the second coupling element KE2, which is arranged separately from the first coupling element KE1. The second generator GE2, like the first generator GE1, is driven by the rotation of the internal combustion engine M, and the kinetic energy of the internal combustion engine M is converted into electrical energy. The second generator GE2 generates a direct current with a voltage of 12 V.

The HMI unit H has the display and operating device on which the data that are important for a user, such as charging current, charging duration and costs of the charging process, are called up and displayed. In addition, a user can initiate or end the charging process and pay. The rechargeable battery B (accumulator) has a capacity of 50 kWh and is charged by the second generator GE2 while the electric vehicle is being charged. At the same time, the battery B supplies the control unit S, the communication unit K and the HMI unit H with electrical energy for operation and the internal combustion engine M with electrical energy for starting and operating. The charging column 1 also has the connection device A for one or more charging cables with which an electric vehicle to be charged is charged. The charging cable also has a data line that establishes a data connection between the control unit S and the electric vehicle. Communication with the battery of the electric vehicle to be charged is established via the data line and the required data such as charge status, charge voltage and charge current are queried. the Control unit S sets the parameters of the charging current on the basis of this data. The charging column 1 is connected to the operator of the charging column 1 and a plurality of charging columns via the communication unit K, which establishes an Internet connection, for example with a cloud storage device. In this exemplary embodiment, the battery B is connected to the connection device A for the charging cable via an inverter WR and the rectifier GR. During the charging process, the inverter GW and rectifier GR function as a power unit, which set the state of charge of the electric vehicle to be charged, the charging voltage and the charging current of the charging station 1.

The method according to the invention is initiated by a start process. Up to this point in time, the charging station 1 is in an idle state (stand-by) in which only the control unit S, the communication unit K and the HMI unit H are ready for operation. The charging station 1 is put into an operating state by the starting process. To do this, the energy conversion process is started first. A starting device installed on the internal combustion engine M (energy conversion device) starts the internal combustion engine M, which is supplied with fuel from the tank T. The first generator GE1 coupled to the internal combustion engine M is driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the first generator GE1 is used exclusively and 100% for charging the electric vehicle. The second generator GE2, which is also coupled to the internal combustion engine M, is also driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the second generator GE2 is used to charge the energy store arranged in the charging column 1 and to operate the HMI unit H, the controller S and the communication unit K during the charging of the electric vehicle. The electric vehicle is then charged using the electrical energy generated by the generator GE1. Usually, a user gives a start command for charging via the HMI unit H. The electric vehicle is supplied with electrical energy through the charging column 1 through the charging cable connected to the connection device A, in this exemplary embodiment with a maximum of 150 kW. After the electric vehicle has been charged, the process of energy conversion is ended, the internal combustion engine M is stopped and the process of charging the electric vehicle is ended. So there is no more electrical energy flowing from the charging station 1 to the electric vehicle. The charging station 1 is put back into the idle state.

Another exemplary embodiment for the energy flow during the charging process between the components of the charging station 1 is shown in FIG. 4. The primary energy source for the charging process is the fuel stored in the tank T (methanol / ethanol or a mixture of methanol and ethanol) with an assumed usable energy content of 6.28 kWh / i. The internal combustion engine M (energy conversion device) generates a nominal output of 70 kW, which is transmitted to the generators GE1 and GE2. The first generator GE1 generates an electrical current with an output of 50 kW, the second generator GE2 an electrical output of 5 kW. The 5 kW power output generated by the second generator GE2, minus 70 W, is fed into the battery B in order to charge it. The control unit S, the communication unit K and the HMI unit H are supplied with power with 70 W of the power generated by the second generator GE2. Therefore, 50 kW of power, generated by the first generator GE1, reach the rectifier GR. The alternating current generated by the first generator GE1 is converted into direct current in the rectifier GR. The direct current (50 kW) generated by the rectifier GR is fed into the charging cable arranged on the connection device A. The battery B with a capacity of 50 kWh supplies the control unit S, the communication unit K and the HMI unit H with a total of 70 W and the internal combustion engine M with 500 W. In this exemplary embodiment, the battery B also supplies 50 kW of power Rectifier GR. This 50 kW power output is also conducted as direct current in addition to the approximately 50 kW power output generated by the first generator GE1 to the energy store of the electric vehicle to be charged and / or to a second electric vehicle to be charged, which is connected to a second charging cable connected to the connection device A. is connected to the charging station 1. The rectifier GR functions in particular as a Power unit. Due to this advantageous configuration of the method according to the invention, the charging time is significantly shortened.

The method according to the invention is initiated by a start process. Up to this point in time, the charging station 1 is in an idle state (stand-by) in which only the control unit S, the communication unit K and the HMI unit H are ready for operation. The charging station 1 is put into an operating state by the starting process. To do this, the energy conversion process is started first. A starting device installed on the internal combustion engine M as an energy conversion device of this exemplary embodiment starts the internal combustion engine M, which is supplied with fuel from the tank T. The first generator GE1 coupled to the internal combustion engine M is driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the first generator GE1 is used exclusively and 100% for charging the electric vehicle. The second generator GE2, which is also coupled to the internal combustion engine M, is also driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the second generator GE2 is used to charge the energy storage device arranged in the charging column 1 and to operate the HMI unit H, the controller S and the communication unit K during the charging of the electric vehicle. The electric vehicle is then charged using the electrical energy generated by the generator GE1. Usually, a user gives a start command for charging via the HMI unit H. The electric vehicle is supplied with electrical energy through the charging column 1 through the charging cable connected to the connection device A, in this exemplary embodiment with a maximum of 150 kW. After the electric vehicle has been charged, the process of energy conversion is ended, the internal combustion engine M is stopped and the process of charging the electric vehicle is ended. So there is no more electrical energy flowing from the charging station 1 to the electric vehicle. The charging station 1 is put back into the idle state. 5 shows a schematic view of the charging column 1 according to the invention, showing the connections by means of power lines between the components within the charging column 1. In this exemplary embodiment, the charging column 1 also has an inverter WR. In the charging station 1, the electrical energy for delivery to an electric vehicle is generated by the energy conversion device, the internal combustion engine M. The internal combustion engine M is a piston internal combustion engine with a shaft power of 220 kW; the internal combustion engine M is operated with methanol or ethanol or a mixture of methanol and ethanol. The fuel is stored in the charging station 1 in the tank T.

The internal combustion engine M drives the first generator GE1 by rotation. The kinetic energy generated by the internal combustion engine M is thus converted by the first generator GE1 into electrical energy, into an alternating current. The internal combustion engine M is connected to the first generator GE1 via the first coupling element KE1. The first generator GE1 generates an electrical power of 200 kW. The alternating current generated by the first generator GE1 is converted into direct current in the rectifier GR. The internal combustion engine M is connected to a second generator GE2 via the second coupling element KE2, which is arranged separately from the first coupling element KE1. The second generator GE2, like the first generator GE1, is driven by the rotation of the internal combustion engine M, and the kinetic energy of the internal combustion engine M is converted into electrical energy. The second generator GE2 generates a direct current with a voltage of 48 V.

The HMI unit H has the display and operating device on which the data that are important for a user, such as charging current, charging duration and costs of the charging process, are called up and displayed. In addition, a user can initiate or end the charging process and pay. The rechargeable battery B (accumulator) has a capacity of 50 kWh and is charged by the second generator GE2 while the electric vehicle is being charged. At the same time, the battery B supplies the control unit S, the communication unit K and the HMI unit H with it electrical energy for operation and the internal combustion engine M with electrical energy for start and operation.

The charging column 1 also has the connection device A for one or more charging cables with which an electric vehicle to be charged is charged. The charging cable also has a data line that establishes a data connection between the control unit S and the electric vehicle. Communication with the battery of the electric vehicle to be charged is established via the data line and the required data such as charge status, charge voltage and charge current are queried. The control unit S sets the parameters of the charging current on the basis of this data. The charging column 1 is connected to the operator of the charging column 1 and a plurality of charging columns via the communication unit K, which establishes an Internet connection, for example with a cloud storage device.

In this exemplary embodiment, the battery B is connected to the connection device A for the charging cable via an inverter WR and the rectifier GR. During the charging process, the inverter GW and rectifier GR function as a power unit, which set the state of charge of the electric vehicle to be charged, the charging voltage and the charging current of the charging station 1. In this exemplary embodiment, a first electric vehicle to be charged is charged with around 200 kW direct current, which is generated by the first generator GE1. A second electric vehicle to be charged is charged by battery B with 50 kW alternating current.

The method according to the invention is initiated by a start process. Up to this point in time, the charging station 1 is in an idle state (stand-by) in which only the control unit S, the communication unit K and the HMI unit H are ready for operation. The charging station 1 is put into an operating state by the starting process. For this purpose, the energy conversion process is first started in the energy conversion device (internal combustion engine M). One on Combustion engine M built-in starting device starts the combustion engine M, which is supplied with fuel from the tank T.

The first generator GE1 coupled to the internal combustion engine M is driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the first generator GE1 is used exclusively and 100% for charging the electric vehicle. The second generator GE2, which is also coupled to the internal combustion engine M, is also driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the second generator GE2 is used to charge the energy store arranged in the charging column 1 and to operate the HMI unit H, the controller S and the communication unit K during the charging of the electric vehicle.

The electric vehicle is then charged using the electrical energy generated by the generator GE1. Usually, a user gives a start command for charging via the HMI unit H. The electric vehicle is supplied with electrical energy through the charging column 1 through the charging cable connected to the connection device A, in this exemplary embodiment with a maximum of 200 kW. After the electric vehicle has been charged, the process of energy conversion is ended, the internal combustion engine M is stopped and the process of charging the electric vehicle is ended. So there is no more electrical energy flowing from the charging station 1 to the electric vehicle. The charging station 1 is put back into the idle state.

Another exemplary embodiment for the energy flow during the charging process between the components of the charging station 1 is shown in FIG. 6. The primary energy source for the charging process is the fuel stored in the tank T (methanol / ethanol or a mixture of methanol and ethanol) with an assumed usable energy content of 6.28 kWh / i. The internal combustion engine M (energy consumption device) generates a Nominal power of 220 kW, which is transmitted to the generators GE1 and GE2. The first generator GE1 generates an electrical current with the power of 200 kW, the second generator GE2 a power output of 5 kW. The 5 kW power output generated by the second generator GE2, minus 70 W, is fed into the battery B in order to charge it. The control unit S, the communication unit K and the HMI unit H are supplied with power with 70 W of the energy generated by the second generator GE2.

The rectifier GR therefore receives 200 kW of power generated by the first generator GE1. The alternating current generated by the first generator GE1 is converted into direct current in the rectifier GR. The direct current (200 kW) generated by the rectifier GR is fed into the charging cable arranged on the connection device A. The battery B with a capacity of 50 kWh supplies the control unit S, the communication unit K and the HMI unit H with a total of 70 W and the internal combustion engine M with 500 W. In this exemplary embodiment, the battery B also supplies 50 kW of power Rectifier GR. This 50 kW power output is also conducted as direct current in addition to the 200 kW power output generated by the first generator GE1 to the energy store of the electric vehicle to be charged and / or to a second electric vehicle to be charged, which is connected to a second charging cable connected to the connection device A the charging station 1 is connected. The rectifier GR functions in particular as a power unit. Due to this advantageous configuration of the method according to the invention, the charging time is significantly shortened.

The method according to the invention is initiated by a start process. Up to this point in time, the charging station 1 is in an idle state (stand-by) in which only the control unit S, the communication unit K and the HMI unit H are ready for operation. The charging station 1 is put into an operating state by the starting process. To do this, the energy conversion process is started first. A starting device installed on the internal combustion engine M (energy conversion device) starts the internal combustion engine M, which is supplied with fuel from the tank T. The first generator GE1 coupled to the internal combustion engine M is driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the first generator GE1 is used exclusively and 100% for charging the electric vehicle. The second generator GE2, which is also coupled to the internal combustion engine M, is also driven by the kinetic energy of the internal combustion engine M and generates electrical energy. This electrical energy generated by the second generator GE2 is used to charge the energy store arranged in the charging column 1 and to operate the HMI unit H, the controller S and the communication unit K during the charging of the electric vehicle.

The electric vehicle is then charged using the electrical energy generated by the generator GE1. Usually, a user gives a start command for charging via the HMI unit H. The electric vehicle is supplied with electrical energy through the charging cable connected to the connection device A through the charging column 1, in this exemplary embodiment with a maximum of 250 kW (200 kW from the first generator GE1, 50 kW from the battery B). After the electric vehicle has been charged, the process of energy conversion is ended, the internal combustion engine M is stopped and the process of charging the electric vehicle is ended. So there is no more electrical energy flowing from the

Charging post 1 to the electric vehicle. The charging station 1 is put back into the idle state.

REFERENCE LIST

1 charging station

H HMI unit

GW DC converter

GE1 1st generator

GE2 2nd generator

S control unit

K communication unit

B battery / accumulator / energy storage

A connection device for charging cable

T tank unit

GR1, GR2 rectifier

WR inverter

KE1 1st coupling element

KE2 2nd coupling element

G housing

M energy conversion device (internal combustion engine)

Claims

PAT EN TA NSPRÜ CHE

1. Process for generating and delivering charging current for an electric vehicle in a charging station (1) with the process steps

Generating kinetic energy with an energy conversion device (M) feeding a first generator (GE1) with the generated kinetic energy. Converting the generated kinetic energy into electrical energy by means of the first generator (GE1), characterized in that a second generator (GE2) with the generated kinetic energy is fed, and the generated kinetic energy is converted into electrical energy by means of the second generator (GE2).

2. A method for generating and delivering charging current for an electric vehicle in a charging station (1) according to claim 1, characterized in that the first generator (GE1) generates an electric current with a voltage greater than 100V.

3. A method for generating and delivering charging current for an electric vehicle in a charging station (1) according to claim 2, characterized in that the second generator (GE2) generates an electric current with a voltage of less than 250V.

4. A method for generating and delivering charging current for an electric vehicle in a charging station (1) according to one or more of the preceding claims, characterized in that 80%, preferably 90% and particularly preferably 100% of the current generated by the first generator (GE1) used to charge an electric vehicle.

5. A method for generating and delivering charging current for an electric vehicle in a charging station (1) according to one or more of the preceding claims, characterized in that the current generated by the second generator (GE2) is used to charge an energy store (B) assigned to the charging station. is used.

6. A method for generating and delivering charging current for an electric vehicle in a charging station (1) according to claim 5, characterized in that the battery (B) is arranged in the charging station (1).

7. A method for generating and delivering charging current for an electric vehicle in a charging station (1) according to one or more of the preceding claims, characterized in that the first generator (GE1) is fed with the generated kinetic energy via a first coupling device (KE1).

8. A method for generating and delivering charging current for an electric vehicle in a charging station (1) according to one or more of the preceding claims, characterized in that the second generator (GE2) is fed with the generated kinetic energy via a second coupling device (KE2).

9. A method for generating and delivering charging current for an electric vehicle in a charging station (1) according to claim 8, characterized in that the second coupling device (KE2) is arranged separately from the first coupling device (KE1).

10. A method for generating and delivering charging current for an electric vehicle in a charging station (1) according to claim 8, characterized in that the first generator (GE1) via the first coupling device (KE1) and the second generator (GE2) via the second coupling device ( KE2) are coupled to the energy conversion device (M).

11. The method for generating and delivering charging current for an electric vehicle in a charging station (1) according to one or more of the preceding claims, characterized in that the current generated by the second generator (GE2) for the operation of an HMI unit (H), a Control (S) and / or a communication unit (K) is used, the HMI unit (H), the control (S) and / or the communication unit (K) being arranged in the charging station (1).

12. The method for generating and delivering charging current for an electric vehicle in a charging station (1) according to one or more of the preceding claims, characterized in that the current generated by the second generator (GE2) is used to charge an electric vehicle.

13. Charging column (1), which is suitable for charging electric vehicles and is intended to include

A first energy conversion device (M) a first generator (GE1) connected to the energy conversion device (M), characterized in that a second generator (GE2) is connected to the energy conversion device (M).

14. Charging column (1), which is suitable for charging electric vehicles and is provided for it, according to claim 13, characterized in that the first generator (GE1) and the second generator (GE2) via separate coupling elements (KE1, KE2) with the energy conversion device ( M) are connected.

15. Charging column (1) which is suitable for charging electric vehicles and is provided for, according to claim 13 or 14, characterized in that the first generator (GE1) via a power line which is suitable and intended to conduct the generated electricity, is connected to the charging cable connection (A).

16. Charging column (1) which is suitable for charging electric vehicles and is provided for, according to claim 15, characterized in that the first generator (GE1) exclusively via one or more power lines that are suitable and intended to conduct the generated electricity , is connected to one or more charging cable connections (A).

17. Charging column (1) which is suitable for charging electric vehicles and is provided for, according to claim 15 or 16, characterized in that a first rectifier (GR) is connected between the first generator (GE1) and the charging cable connection (A).

18. Charging column (1) which is suitable for charging electric vehicles and is provided for, according to one or more of claims 13 to 17, characterized in that the second generator (GE2) via a power line which is suitable and intended for the generated Conducting electricity is connected to a battery (B).

19. Charging station (1) which is suitable for charging electric vehicles and is provided for, according to claim 18, characterized in that a second rectifier (GR2) is connected between the second generator (GE2) and the battery (GR2).

20. Charging column (1) which is suitable for charging electric vehicles and is provided for, according to one or more of claims 13 to 19, characterized in that the battery (B) is connected to the energy conversion device (M) via a power line, wherein the Power line is provided and suitable for supplying the energy conversion device (M) with electrical energy.

21. Charging column (1), which is suitable for charging electric vehicles and is provided for, according to one or more of claims 13 to 20, characterized in that the second generator (GE2) via a power line which is suitable and intended for the generated electricity is connected to an HMI unit (H), a communication unit (K) and / or a controller (S).

22. Charging column (1), which is suitable for charging electric vehicles and is provided for, according to one or more of claims 13 to 21, characterized in that the battery (B) via an inverter (WR) and a power line with the first rectifier ( GR1) is connected.

23. Charging column (1), which is suitable for charging electric vehicles and is provided for, according to one or more of claims 13 to 22, characterized in that the battery (B) via a DC converter (GR2) and a power line with the charging cable connection (A ) connected is.

24. Charging column (1), which is suitable for charging electric vehicles and is provided for, according to one or more of claims 13 to 23, characterized in that the first generator (GE1) is provided and suitable for supplying current with a voltage greater than 100V to create.

25. Charging column (1), which is suitable for charging electric vehicles and is provided for, according to one or more of claims 13 to 24, characterized in that the second generator (GE2) is provided and suitable for current with a voltage of less than 250V to generate, ex. 220V house electricity.