DE102019124271A1 - Charger station for an electric motor vehicle - Google Patents

Abstract

The invention relates to a charging station for charging electric vehicles, which has a housing, a first device for energy conversion, a second device for energy conversion, a control unit and a tank for a liquid energy carrier: both units for energy conversion, the tank and the control unit are arranged in the housing. The invention further relates to a method for generating a charging current for charging electric vehicles with the method steps of supplying a liquid energy carrier from a tank arranged in a housing of a charging column to a first device for energy conversion, the first device for energy conversion also being arranged in the housing , Conversion of the liquid energy carrier into kinetic or electrical energy in the first device for energy conversion, conversion of the kinetic or electrical energy into a current in a second device for energy conversion, the second device for energy conversion being arranged in the housing and delivery of the Power to an electric vehicle.

Description

The invention relates to a charging station for charging electric vehicles, which has a housing, a first device for energy conversion, a second device for energy conversion, a control unit and a tank for a liquid energy carrier, with both units for energy conversion, the tank and the control unit are arranged in the housing. The invention further relates to a method for generating a charging current for charging electric vehicles with the method steps of supplying a liquid energy carrier from a tank arranged in a housing of a charging column to a first device for energy conversion, the first device for energy conversion also being arranged in the housing , Conversion of the liquid energy carrier into kinetic or electrical energy in the first device for energy conversion, conversion of the kinetic or electrical energy into a current in a second device for energy conversion, the second device for energy conversion being arranged in the housing and delivery of the Power to an electric vehicle.

State of the art

With the spread of electric vehicles that are operated with an electric motor, a functioning infrastructure for charging the electric vehicles must be made available. In addition to charging at the house socket, users of electric vehicles must also be given the opportunity to obtain energy in the public sector. With the range of electric vehicles available up to now, 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.

Stationary systems for the electrical supply of stationary charging stations are known, in order to recharge the traction battery of a plug-in vehicle - hybrid or electric vehicle, for example in DE 10 2009 016 505 A1 described. 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.

Such a charging device has the disadvantage that it cannot be flexibly set up or dismantled. The costs for the construction and especially the connection of the charging device to the existing power grid are also very high. So if the charging device is only to remain temporarily at the current location, its erection and dismantling cause unnecessarily high costs. Charging devices that are constructed in such a way that they can be transported are more flexible.

The patent specification DE 10 2010 043 516 A1 - Device for rapid charging of an electrical energy storage device of a vehicle ‟from the company Power Innovation Power Supply Technology GmbH discloses a device for exchanging electrical energy. The device has an electrical energy store (battery) that charges the vehicle's energy store via a programmable controller and an AC / DC converter. The energy store of the device itself is recharged via various direct voltage sources. All components (energy storage, control, converter) are arranged in a device, the DC voltage source for charging the energy storage is external and remote from the device.

This charging device has the disadvantage that it is made so large and heavy that it can only be set up and operated over large areas, for example in parking lots in shopping centers. Their use in e.g. multi-storey car parks is not possible. A connection to an existing power grid is also necessary.

The utility model " DE 20 2010 011 567 U1 - Mobile charging station ‟from the company Beton- und Energietechnik Heinrich Gräper GmbH & Co. KG discloses a portable charging station that is arranged within a portable station building. The building has several rooms and is made of concrete. In the building there are both fuel cell modules, storage tanks for the fuel (hydrogen, methane, biogas) and an inverter. The building also has a photovoltaic system for self-sufficiency.

This loading device is also very large and heavy. At least one truck is required for their transport.

The patent specification " DE 10 2017 207 023 B4 - Charging system and method for operating a charging system from AUDI AG discloses a charging system that has a transportable charging station. The charging station has a generator that is operated using a synthetic fuel. Excess energy is stored in an intermediate storage device (battery), which is arranged in the charging station. The fuel itself is produced in an external fuel production facility. The fuel is synthesized from the carbon dioxide in the atmosphere using regenerative energy sources.

This charging device requires synthetic fuel for its operation, which is currently not available or is only available in small quantities and is therefore very expensive. Operation of the charging device is therefore also very expensive, and a supply of the required synthetic fuel is not guaranteed.

It is therefore the object of the present invention to provide a charging device for motor vehicles which is so compact and lightweight that it can be set up, operated and dismantled again easily and quickly almost anywhere, if necessary.

It is also the object of the present invention to provide a charging device for motor vehicles which is so compactly constructed that it is more cost-effective to manufacture, install and operate than previously known charging devices, and which works independently.

The stated object is achieved by means of the charging station according to claim 1. Further advantageous configurations of the invention are set out in the subclaims.

The charging column according to the invention for charging electric vehicles has a first device for energy conversion and a second device for energy conversion. In addition, the charging station has a tank for a liquid energy carrier and a control unit. According to the invention, both devices for energy conversion, the tank and the control unit, are advantageously installed in a housing.

The dimensions of the charging station are very compact and it can be transported, set up, operated and dismantled as a whole component. For rural areas in particular, the charging column according to the invention offers advantages over conventional charging columns that have to be connected to an existing power grid: The costs of the charging column and thus the investments for installation and operation are low. If the charging station cannot be operated profitably at the chosen location, it can be easily dismantled. Even in the case of structural measures in the immediate vicinity of the charging station, it can be removed quickly and reassembled at another, more suitable location.

In a further advantageous embodiment of the invention, the first device for energy conversion is suitable for converting a liquid energy carrier into electrical and / or kinetic energy. An internal combustion engine drives the second device for energy conversion by rotation. The kinetic energy generated by the internal combustion engine is thus converted into electrical energy by the second device for energy conversion. When using a fuel cell as the first device, the fuel cell generates electrical energy directly.

In a further embodiment of the invention, the liquid energy carrier is methanol, ethanol or hydrogen. Both types of fuel can be produced from biomass in an environmentally friendly way, have long been established as fuels around the world and are therefore available at low cost. Their transport, storage and operation are comparable to conventional gasoline and are therefore unproblematic.

In a particularly advantageous embodiment of the invention, the first and the second device for energy conversion are a fuel cell with a converter or an internal combustion engine with a generator. The internal combustion engine is usually a piston internal combustion engine, but other designs are also possible. The generator generates electrical energy as electricity through rotation. If necessary, a converter converts the current generated by the generator into a direct current and adjusts the voltage of the direct current. A fuel cell generates electrical energy in the form of a current without any detours, a converter and / or current converter converts the generated current into a direct current with a minimum voltage, if necessary.

In a further aspect of the invention, the charging station has an electrical energy store. The energy store supplies the control unit and possibly lighting with energy and starts the first device for energy conversion. The electrical energy store is advantageously designed to be rechargeable.

In a further embodiment of the invention, the electrical energy store is connected in such a way that it can operate a device for conveying the liquid energy carrier to the first device for energy conversion. In order to operate the first device for energy conversion, it is necessary to convey the fuel from the tank to the first device for energy conversion. This is usually done using a commercially available fuel pump. The fuel pump is supplied with energy by the electrical energy store.

In a particularly advantageous embodiment of the invention, the charging column is suitable for generating electricity without supplying energy from outside the charging column. Thanks to the implementation of all of its individual components, the charging station has a very compact design and does not require a connection to an existing power grid. The charging station can be transported, set up, operated and dismantled again. The costs of the charging station and thus the investments for installation and operation are low. If the charging station cannot be operated profitably at the chosen location, it can be easily dismantled. Even in the case of structural measures in the immediate vicinity of the charging station, it can be removed quickly and reassembled at another, more suitable location.

In a further development of the invention, the charging station has only one or more electrical connections that are suitable for charging electric vehicles. The electrical energy generated in the charging station is delivered to a motor vehicle via one or more electrical connections (charging cables). The charging station has no other electrical connections that are outside the housing. The charging station therefore does not need a connection to an existing power grid. The costs of the charging station and thus the investments for installation and operation are low.

In a further embodiment of the invention, the charging column only has lines and / or connections that are suitable for conducting electrical energy out of the charging column. The electrical energy generated in the charging station is delivered to a motor vehicle via one or more electrical connections (charging cables). The charging station has no other electrical connections that are outside the housing. The charging station therefore does not need a connection to an existing power grid. The costs of the charging station and thus the investments for installation and operation are low.

In a further embodiment of the invention, the tank is designed in such a way that it holds at least 1001 of the liquid energy carrier, preferably 2001 and particularly preferably 5001. The volume of the tank is dimensioned so that at least 10 charging processes (tank content 1001) are possible. The tank volume can be adjusted according to the requirements determined by the location of the charging station. For example, it makes sense to choose a small tank volume in large cities because the refueling infrastructure is good, so the charging station can be refueled very quickly. In rural areas, a larger tank volume is chosen in order to increase the intervals between the individual refueling processes.

In a further embodiment of the invention, the tank has a volume for holding a quantity of a liquid energy carrier with an energy of at least 125 kWh, preferably 440 kWh and particularly preferably 2000 kWh. The volume of the tank is dimensioned so that at least 10 charging processes (tank content 125 kWh) are possible. The tank volume can be adjusted according to the requirements determined by the location of the charging station. For example, it makes sense to choose a small tank volume in large cities because the refueling infrastructure is good, so the charging station can be refueled very quickly. In rural areas, a larger tank volume is chosen in order to increase the intervals between the individual refueling processes.

The stated object is also achieved by means of the method according to the invention for generating a charging current for charging electric vehicles according to claim 10.

The method according to the invention for generating a charging current for charging electric vehicles has five method steps: In the first method step, a liquid energy carrier is fed into a tank arranged in a housing. The tank can be filled using a tanker, for example.

In the second process step, a liquid energy carrier is fed from a tank into the first device for energy conversion. The tank and the first device for energy conversion are arranged in a housing. The charging process begins when a user plugs the electrical connection (charging cable) into the corresponding socket of the motor vehicle to be charged. Then the fuel from the tank is fed to the first device for energy conversion, e.g. by means of a fuel pump, and this is put into operation.

In the third process step, the liquid energy carrier is converted into kinetic or electrical energy in the first device for energy conversion. Depending on the design of the first energy conversion device (internal combustion engine or fuel cell), the chemical energy stored in the fuel is converted into kinetic energy in the internal combustion engine; a fuel cell converts the chemical energy stored in the fuel into direct current.

In the fourth method step, the electrical or kinetic energy that was generated by means of the first device for energy conversion is converted into a direct current in the second device for energy conversion. When using an internal combustion engine as the first device for energy conversion, the internal combustion engine drives the second device for energy conversion, for example a generator, by rotation. The kinetic energy generated by the internal combustion engine is therefore converted into electrical energy by the generator, into electricity. At Using a fuel cell, the generated direct current is converted into a direct current with a minimum voltage by means of a converter. The second device for energy conversion can accordingly be designed as a converter and / or current converter.

In the fifth method step, the electricity that was generated in the second device for energy conversion is delivered to an electric vehicle. The dimensions of the charging station are very compact and it can be transported, set up, operated and dismantled as a whole component. For rural areas in particular, the charging column according to the invention offers advantages over conventional charging columns that have to be connected to an existing power grid: The costs of the charging column and thus the investments for installation and operation are low. If the charging station cannot be operated profitably at the chosen location, it can be easily dismantled. Even in the case of structural measures in the immediate vicinity of the charging station, it can be removed quickly and reassembled at another, more suitable location.

In a further embodiment of the invention, a device for conveying the liquid energy carrier to the first device for energy conversion by means of an electrical energy store is put into operation. In order to operate the first device for energy conversion, it is necessary to convey the fuel from the tank to the first device for energy conversion. This is usually done using a commercially available fuel pump. The fuel pump is supplied with energy and started by the electrical energy store.

In a further embodiment of the invention, the liquid energy carrier is fed to the first device for energy conversion by charging an electrical energy store. In order to operate the first device for energy conversion, it is necessary to convey the fuel from the tank to the first device for energy conversion. This is usually done using a commercially available fuel pump. The fuel pump is supplied with energy and started by the electrical energy store.

In a further advantageous embodiment of the invention, electrical energy is transported exclusively from the charging column to outside the charging column. The electrical energy generated in the charging station is delivered to a motor vehicle via one or more electrical connections (charging cables). The charging station has no other electrical connections that are outside the housing. The charging station therefore does not need a connection to an existing power grid. The costs of the charging station and thus the investments for installation and operation are low.

In a further development of the invention, the generation of electrical energy in the charging station begins with the start of a charging process. If the charging station is not in operation, it is in standby mode. Only at the request of a user, usually by the user plugging the electrical connection (charging cable) into the electrical connection of the motor vehicle to be charged, does the charging station begin to operate. In standby mode, the charging station itself consumes very little energy.

In a further aspect of the invention, the generation of electrical energy in the charging station ends with the end of a charging process. The charging process ends when the user detaches the charging cable from the motor vehicle to be charged or when the energy storage device of the motor vehicle is sufficiently charged (e.g. 80% of the capacity of the energy storage device or more). After the charging process has ended, the first device for energy conversion is stopped and fuel is no longer conveyed to the first device for energy conversion. The charging station goes into standby mode until the next charging process begins.

In a further embodiment of the invention, the supply of a liquid energy carrier from a tank arranged in a housing of a charging column to a first device for energy conversion does not take place at the same time as the feeding of a liquid energy carrier into a tank arranged in a housing of a charging column. The tank is filled on the one hand for safety reasons at a different point in time than the charging process, on the other hand in order not to interrupt a charging process. This increases the quality of service for a user.

In a further embodiment of the invention, several charging processes take place between two processes for feeding a liquid energy carrier into a tank arranged in a housing of a charging column. The volume of the tank is dimensioned in such a way that several loading processes are possible. The control unit can send a signal, e.g. an SMS or email, to the operator of the charging station when the tank content has fallen below a certain previously defined volume.

In a further embodiment of the invention, a volume of a liquid energy carrier with an energy of at least 125 kWh, preferably 440 kWh and particularly preferably 2000 kWh is supplied to the tank arranged in a housing of a charging column. The volume of the tank is dimensioned so that at least 10 loading processes ( Tank capacity 125 kWh) are possible. The tank volume can be adjusted according to the requirements determined by the location of the charging station. For example, it makes sense to choose a small tank volume in large cities because the refueling infrastructure is good, so the charging station can be refueled very quickly. In rural areas, a larger tank volume is chosen in order to increase the intervals between the individual refueling processes.

In a further embodiment of the invention, at least 1001 of the liquid energy carrier are fed to the tank arranged in a housing of a charging column, preferably 2001 and particularly preferably 5001. The volume of the tank is dimensioned so that at least 10 charging processes (tank content 1001) are possible. The tank volume can be adjusted according to the requirements determined by the location of the charging station. For example, it makes sense to choose a small tank volume in large cities because the refueling infrastructure is good, so the charging station can be refueled very quickly. In rural areas, a larger tank volume is chosen in order to increase the intervals between the individual refueling processes.

• 1: Ein Ausführungsbeispiel der erfindungsgemäßen Ladesäule mit Verbrennungsmotor
• 2: Ein Ausführungsbeispiel der erfindungsgemäßen Ladesäule mit Brennstoffzelle
• 3: Ein Ausführungsbeispiel des erfindungsgemäßen Verfahrens für die Aufladung von Elektrofahrzeugen

Embodiments of the charging station according to the invention for charging electric vehicles and the method according to the invention for generating a charging current for charging electric vehicles are shown schematically in simplified form in the drawings and are explained in more detail in the following description. Show it:

• 1 : An embodiment of the charging station according to the invention with an internal combustion engine
• 2 : An embodiment of the charging station according to the invention with a fuel cell
• 3 : An embodiment of the method according to the invention for charging electric vehicles

An embodiment of the charging station according to the invention 1 shows 1 . The charging station 1 In this exemplary embodiment, it has an internal combustion engine 7th on, within the first device for energy conversion 3 is installed. The internal combustion engine 7th is usually a piston internal combustion engine, but other designs such as a rotary engine or turbine are also possible. The combustion engine is operated 7th advantageously preferably with methanol or ethanol or a mixture of methanol and ethanol. Both types of fuel can be produced from biomass in an environmentally friendly way, have long been established as fuels around the world and are therefore available at low cost. Their transport and storage as well as their operation in internal combustion engines are comparable to conventional gasoline (for motor vehicles) and are therefore unproblematic. The storage of the fuel in the charging station according to the invention 1 takes place in a tank 6th with a capacity of 1001. The internal combustion engine 7th drives the second device for energy conversion 3 by rotation, in this embodiment a generator 8th . The by the internal combustion engine 7th Kinetic energy is generated by the generator 8th converted into electrical energy, into a current.

Furthermore is in the charging station 1 an electrical energy storage device (rechargeable battery) 9 and a device for transporting the liquid energy carrier 11 installed. The energy storage 9 supplies the control unit 5 , by means of which the charging station 1 recognizes and initiates the beginning or the end of a charging process. In addition, a user can by means of the control unit 5 pay for the charging process. Several payment systems are possible, e.g. using different credit cards or a mobile device, e.g. a smartphone.

The electrical energy storage 9 starts via a starter and the fuel pump 11 that put the fuel in the internal combustion engine 7th promotes, also the internal combustion engine 7th at the beginning of a charging process. The electrical energy storage 9 is possibly by the by the generator 8th generated electrical energy is recharged. Via one or more electrical connections 10 (Charging cable) is in the charging station 1 generated electrical energy delivered to a motor vehicle.

The first and the second energy conversion device 3 , 4th with combustion engine 7th and generator 8th , Tank 6th , Energy storage 9 , the fuel pump 11 , Control unit 5 as well as the electrical connections 10 are all advantageously in an enclosure 2 installed. The charging station 1 can be operated completely self-sufficiently, as stated, ie it does not require an electrical connection to an existing power grid. The electrical energy required for its operation is provided by the rechargeable energy store 9 delivered. The dimensions of the charging station 1 are also very compact, usually the fuel tank takes up most of the space 6th on. By properly choosing the size of the tank 6th can change the dimensions of the charging station 1 can be kept small, but it may then be necessary to fill the tank frequently 6th with fuel. The control unit 5 is for this purpose advantageously via WLAN or similar communication facilities with the operator of the charging station 1 connected and issues a corresponding message when the tank 6th needs to be refilled.

The method according to the invention for generating a charging current for charging electric vehicles has five method steps: Im first process step 100 a liquid energy carrier, in this exemplary embodiment methanol obtained from biomass, is placed in a tank arranged in a housing 6th fed. The filling of the tank 6th takes place by means of a tanker. The tank 6th at least 1001 (corresponding to 200 kWh) of methanol are supplied, preferably 2001 (corresponding to 400 kWh) and particularly preferably 5001 (corresponding to 1000 kWh). The volume of the tank is dimensioned so that at least 10 loading processes (tank content 1001) are possible. The tank volume can be adjusted according to the requirements determined by the location of the charging station. For example, it makes sense to choose a small tank volume in large cities because the refueling infrastructure is good, so the charging station can be refueled very quickly. In rural areas, a larger tank volume is chosen in order to increase the intervals between the individual refueling processes. Preferred tank volumes here are 20001, 10,0001 or 20,0001.

The charging process begins when a user connects the electrical connection (charging cable) 10 into the corresponding socket of the motor vehicle to be charged. The control unit 5 recognizes this, and in the second process step 200 gets the fuel out of the tank 6th through the fuel pump 11 the internal combustion engine 7th fed and this started by means of a starter. Starter and fuel pump 11 are thereby through the energy storage 9 supplied with energy. In the third process step 300 drives the combustion engine 7th the generator 8th on, the chemical energy stored in the fuel is converted into kinetic energy and in the fourth process step 400 into electrical energy. This electrical energy is used in the fifth process step 500 via the charging cable 10 delivered to the motor vehicle. The charging process ends when the user disconnects the charging cable 10 from the motor vehicle or when the energy store of the motor vehicle is sufficiently charged (eg 80% of the capacity of the energy store or more). After the charging process has ended, the internal combustion engine will turn off 7th stopped and no more fuel to the combustion engine 7th promoted. The charging station 1 goes into standby mode until the start of the next charging process.

2 shows an embodiment of the charging station according to the invention, which is made by means of a fuel cell 7th Generates electricity for charging a motor vehicle. The charging station 1 has a fuel cell 7th on, within the first device for energy conversion 3 is installed. The fuel cell 7th is usually a Direct Methanol Fuel Cell (DMFC), which is operated with methanol. However, other fuel cell designs are also possible 7th that are operated, for example, using ethanol, biogas or hydrogen. All of these types of fuel can be produced from biomass or natural gas in an environmentally friendly way, have long been established as fuels around the world and are therefore available at low cost.

In particular, the transport and storage of liquid operating materials (methanol, ethanol) and their operation in fuel cells are comparable to conventional gasoline (for motor vehicles) and therefore unproblematic. The storage of the fuel in the charging station according to the invention 1 takes place in a tank 6th . The fuel cell 7th Usually consists of several stacks of individual fuel cells and is therefore the desired performance of the charging station 1 customizable.

Furthermore is in the charging station 1 an electrical energy storage device (rechargeable battery) 9 and a device for transporting the liquid energy carrier 11 installed. The energy storage 9 supplies the control unit 5 , by means of which the charging station 1 recognizes and initiates the beginning or the end of a charging process. In addition, a user can by means of the control unit 5 pay for the charging process. Different payment systems are possible, e.g. using different credit cards or a mobile device, e.g. a smartphone.

The electrical energy storage 9 starts via the fuel pump 11 that put the fuel into the fuel cell 7th promotes at the beginning of a charging process. By means of the inverter 8th becomes the one in the fuel cell 7th generated direct current is converted into direct current with a minimum voltage. The electrical energy storage 9 is possibly back through by the generator 8th generated electrical energy is recharged. Via one or more electrical connections 10 (Charging cable) is in the charging station 1 generated electrical energy delivered to a motor vehicle.

The first and the second energy conversion device 3 , 4th with fuel cell 7th and inverter 8th , Tank 6th , Energy storage 9 , the fuel pump 11 , Control unit 5 as well as the electrical connections 10 are all advantageously in an enclosure 2 installed. The charging station 1 can be operated completely self-sufficiently, as stated, ie it does not require an electrical connection to an existing power grid. The electrical energy required for its operation is provided by the rechargeable energy store 9 delivered. The dimensions of the charging station 1 are also very compact, usually the fuel tank takes up most of the space 6th on. By properly choosing the size of the tank 6th can change the dimensions of the charging station 1 can be kept small.

The method according to the invention for generating a charging current for charging electric vehicles has five method steps: In the first method step 100 becomes a liquid energy carrier in a tank arranged in an enclosure 6th fed. The filling of the tank 6th takes place by means of a tanker. The charging process begins when a user connects the electrical connection (charging cable) 10 into the corresponding socket of the motor vehicle to be charged. The control unit 5 recognizes this, and in the second process step 200 gets the fuel out of the tank 6th through the fuel pump 11 the fuel cell 7th fed. The fuel pump 11 is thereby through the energy storage 9 supplied with energy. In the third process step 300 generates the fuel cell 7th a direct current, in the fourth process step 400 is the direct current through the converter 8th converted into a direct current with a minimum voltage (e.g. 230V or 920V). This direct current is used in the fifth process step 500 via the charging cable 10 delivered to the motor vehicle. The charging process ends when the user disconnects the charging cable 10 from the motor vehicle or when the energy store of the motor vehicle is sufficiently charged (for example 90% of the capacity of the energy store or more). After the charging process is completed, the fuel cell will start operating 7th stopped and no more fuel to the fuel cell 7th promoted. The charging station 1 goes into standby mode until the start of the next charging process.

3 shows the method according to the invention for generating a charging current for charging electric vehicles. The method according to the invention by means of the charging station according to the invention 1 has five procedural steps: In the first procedural step 100 is a liquid energy carrier in a tank arranged in an enclosure 6th fed. The charging process begins when a user connects the electrical connection (charging cable) 10 into the corresponding socket of the motor vehicle to be charged. The control unit 5 recognizes this, and in the second process step 200 gets the fuel out of the tank 6th through the fuel pump 11 the fuel cell 7th or the internal combustion engine 7th fed and this started by means of a starter. The fuel pump 11 is thereby through the energy storage 9 supplied with energy. In the third process step 300 generates the fuel cell 7th a direct current or drives the internal combustion engine 7th the generator 8th at. In the fourth process step 400 is the direct current coming from the fuel cell 7th is generated by the converter 8th converted into direct current with a minimum voltage. In the case of the presence of an internal combustion engine 7th drives the combustion engine 7th the generator 8th on, the chemical energy stored in the fuel is converted into kinetic energy and in the fourth process step 400 into electrical energy.

This stream is used in the fifth process step 500 via the charging cable 10 delivered to the motor vehicle. The charging process ends when the user disconnects the charging cable 10 from the motor vehicle or when the energy store of the motor vehicle is sufficiently charged (eg 75% of the capacity of the energy store or more). After the charging process has ended, the internal combustion engine will turn off 7th stopped and no more fuel to the combustion engine 7th promoted. The charging station 1 goes into standby mode until the start of the next charging process.

List of reference symbols

1

Charging station

2

Enclosure

3

1. Device for energy conversion

4th

2. Device for energy conversion

5

Control unit

6th

tank

7th

Fuel cell / internal combustion engine

8th

Converter / generator

9

Energy storage

10

Electrical connection

11

Device for transporting the liquid energy carrier

100

Feeding a liquid energy carrier into the tank

200

Transport of a liquid energy carrier from the tank to the first device for energy conversion

300

Conversion of the liquid energy carrier into kinetic or electrical energy

400

Conversion of kinetic or electrical energy into direct current

500

Charging an electric vehicle

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102009016505 A1 [0003]
• DE 102010043516 A1 [0005]
• DE 202010011567 U1 [0007]
• DE 102017207023 B4 [0009]

Claims (24)

Charging station (1) for charging electric vehicles, which has: • an enclosure (2) • a first device for energy conversion (3) • a control unit • a tank (6) for a liquid energy carrier, wherein the first device for energy conversion (3), the tank (6), and the control unit (5) are arranged in the housing (2). Charging station (1) for charging electric vehicles according to Claim 1 , characterized in that the first device for energy conversion (3) is suitable for converting a liquid energy carrier into electrical and / or kinetic energy. Charging station (1) for charging electric vehicles according to Claim 1 or 2 , characterized in that the liquid energy carrier is methanol, ethanol, biogas or hydrogen. Charging column (1) for charging electric vehicles according to one or more of the preceding claims, characterized in that the first device for energy conversion (3) is a fuel cell (7) or an internal combustion engine (7). Charging column (1) for charging electric vehicles according to one or more of the preceding claims, characterized in that a second device for energy conversion (4) is arranged in the housing (2). Charging station (1) for charging electric vehicles according to Claim 5 , characterized in that the second device for energy conversion (4) is a generator (8). Charging column (1) for charging electric vehicles according to one or more of the preceding claims, characterized in that the charging column (1) has an electrical energy store (9). Charging station (1) for charging electric vehicles according to Claim 7 , characterized in that the electrical energy store (9) is connected in such a way that it is suitable for starting a device for conveying the liquid energy carrier (11) to the first device for energy conversion (3). Charging column (1) for charging electric vehicles according to one or more of the preceding claims, characterized in that the charging column (1) is suitable for generating electricity without an external energy supply. Charging column (1) for charging electric vehicles according to one or more of the preceding claims, characterized in that the charging column (1) has only one or more electrical connections which are suitable for charging electric vehicles. Charging column (1) for charging electric vehicles according to one or more of the preceding claims, characterized in that the charging column (1) only has lines and / or connections that are suitable for conducting electrical energy out of the charging column. Charging column (1) for charging electric vehicles according to one or more of the preceding claims, characterized in that the tank (6) holds at least 1001 liquid energy carriers, preferably 2001 and particularly preferably 5001. Charging column (1) for charging electric vehicles according to one or more of the preceding claims, characterized in that the tank (6) has a volume for receiving an amount of a liquid energy carrier with an energy of at least 125 kWh, preferably 440 kWh and particularly preferably 2000 kWh has. Process for generating a charging current for charging electric vehicles, comprising the following process steps: • feeding (100) a liquid energy carrier into a tank (6) arranged in a housing (2) of a charging station (1), • Feeding (200) a liquid energy carrier from a tank (6) arranged in a housing (2) of a charging station (1) to a first device for energy conversion (3), the first device for energy conversion (3) also being in the housing ( 2) is arranged, • Conversion (300) of the liquid energy carrier into kinetic or electrical energy by the first device for energy conversion (3) • Delivery (500) of the electrical energy in the form of a current to an electric vehicle. Method for generating a charging current for charging electric vehicles according to Claim 14 , characterized in that conversion (400) of the kinetic or electrical energy into a direct current by a second device for energy conversion (4). Method for generating a charging current for charging electric vehicles according to Claim 14 , characterized in that a device for conveying the liquid energy carrier (11) to the first device for Energy conversion (3) is started by charging an electrical energy store (9). Method for generating a charging current for charging electric vehicles according to Claim 14 or 15th , characterized in that the supply (200) of the liquid energy carrier to the first device for energy conversion (3) takes place by charging an electrical energy store (9). Method for generating a charging current for charging electric vehicles according to one or more of the Claims 14 to 16 , characterized in that electrical energy is transported exclusively from the charging station (1) to the outside. Method for generating a charging current for charging electric vehicles according to one or more of the Claims 14 to 17th , characterized in that the generation of electrical energy in the charging station (1) starts with the start of a charging process. Method for generating a charging current for charging electric vehicles according to one or more of the Claims 14 to 18th characterized in that the generation of electrical energy in the charging station (1) ends with the completion of a charging process. Method for generating a charging current for charging electric vehicles according to one or more of the Claims 14 to 19th characterized in that the supply (200) of a liquid energy carrier from a tank (6) arranged in a housing (2) of a charging station (1) to a first device for energy conversion (3) does not occur at the same time as the supply (100) of a liquid energy carrier takes place in a tank arranged in a housing (2) of a charging station (1). Method for generating a charging current for charging electric vehicles according to one or more of the Claims 14 to 20th characterized in that between two processes for feeding (100) a liquid energy carrier into a tank (6) arranged in a housing (2) of a charging column (1), several charging processes take place. Method for generating a charging current for charging electric vehicles according to one or more of the Claims 14 to 21 characterized in that between two processes for feeding (100) a liquid energy carrier into a tank (6) arranged in a housing (2) of a charging station (1) when charging electric vehicles, an energy of at least 125 kWh, preferably at least 440 kWh and particularly preferably at least 2000 kWh is output. Method for generating a charging current for charging electric vehicles according to one or more of the Claims 14 to 22nd characterized in that when a liquid energy carrier is fed into a tank (6) arranged in a housing (2) of a charging station (1), at least 1001, preferably at least 2001 and particularly preferably at least 5001 liquid energy carriers are fed.

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