DE102017010342A1 - Charging station for charging an energy storage device of a motor vehicle, method for operating a charging station and method for operating a motor vehicle - Google Patents

Abstract

The invention relates to a charging station (10) for charging an energy store (12) of a motor vehicle (14), having an energy supply device (20), by means of which electrical energy for charging the energy store (12) can be provided, with an air supply device (24) which air (80) to cool and the cooled air (80) can be provided, and with an air connection means (28) by means of which the air supply means (24) to the motor vehicle (14) is connectable, whereby the means of the air supply means (24) cooled and provided air (80) to the motor vehicle (14), wherein the air connection means (28) at least one connection element (30), by means of which the air connection means (28) fluidly with at least one supply air duct (32) one for venting the vehicle interior ( 34) of the motor vehicle (14) formed ventilation device (36) of the motor vehicle (14) verbin dbar, whereby the vehicle interior (34) of the motor vehicle (14) by means of the air supply device (24) cooled and provided air (80) can be fed.

Description

The invention relates to a charging station for charging an energy storage device of a motor vehicle, an operating method for a charging station and an operating method for a motor vehicle according to the preambles of the independent claims.

Such a charging station for charging an energy storage of a motor vehicle is already out of the US 2015/0306974 A1 known. This charging station comprises a charging device which is adapted to provide electrical energy for the energy storage of the motor vehicle. Furthermore, the charging station comprises a thermal conditioning device, by means of which the energy store can be tempered during a charging process in which the energy store is charged. Here, the thermal conditioning device directs conditioned air to an air-coolant heat exchanger of the motor vehicle. The air-coolant heat exchanger is coupled via a coolant circuit with the energy storage of the motor vehicle for controlling the temperature of the energy storage.

Object of the present invention is to provide a charging station for charging an energy storage device of a motor vehicle, and respective operating method for a charging station and for a motor vehicle, by means of which the energy storage of the motor vehicle is particularly advantageous loadable.

This object is achieved by a charging station for charging an energy storage device of a motor vehicle and by respective operating method of a charging station or a motor vehicle having the features of the independent claims. Advantageous embodiments with expedient development of the invention are specified in the respective dependent claims and in the following description.

A first aspect of the invention relates to a charging station for charging an energy store of a motor vehicle, having an energy supply device, by means of which electrical energy for charging the energy store can be provided. The motor vehicle is an electrically operable motor vehicle. The electrically operable motor vehicle can be driven by electrical energy from an electric machine that can be supplied by the energy store. In this case, the motor vehicle may be designed, for example, as a hybrid motor vehicle or electric vehicle. The energy store of the motor vehicle is in particular a high-voltage energy store, which is set up to supply the electric machine with a voltage of at least 50 volts, in particular at least 60 volts, in particular at least 100 volts, in particular at least 200 volts. The high-voltage energy storage is also referred to as a traction battery. The charging station comprises, in addition to the energy supply device, an air supply device, by means of which air can be cooled and the cooled air can be provided. For example, the air can be cooled by means of a compression refrigeration system and then provided by the air supply device for transmission to the motor vehicle. In addition, the charging station comprises an air connection device, by means of which the air supply device can be connected to the motor vehicle, whereby the air cooled and provided by means of the air supply device can be transmitted to the motor vehicle. In this case, the air can be removed from an environment of the air supply device, then cooled and ready for transmission to the motor vehicle.

In order to enable a particularly advantageous charging of the energy storage device, it is provided according to the invention that the air connection device has at least one connecting element, by means of which the air connection device can be fluidically connected to at least one supply air channel of a ventilation device of the motor vehicle designed for ventilating the vehicle interior of the motor vehicle. As a result, the air cooled by the air supply device and provided air can be fed to the vehicle interior of the motor vehicle. In this case, the connection element is at least partially within the supply air duct can be arranged to allow a fluidic and an environment of the charging station and the motor vehicle tight connection between the air supply device and the supply air duct of the motor vehicle. In particular, the connection element has an outflow opening, through which the air can be flowed out of the air connection device, wherein in a connection of the connection element with the supply air duct, the outflow opening can be brought into overlap with an inlet opening of the supply air channel. Alternatively or additionally, the outflow opening of the connection element can be arranged in the connection of the connection element with the supply air duct in the supply air duct and thus enclosed by the supply air duct. By means of the connection element, a connection between the charging station and the motor vehicle can be produced when the energy store of the motor vehicle is being charged, via which the preconditioned air can flow into the inlet air channel forming an inlet of a vehicle air conditioning system or the ventilation device. As a result, advantages in terms of energy efficiency, vehicle air conditioning of the motor vehicle and a charging time of the energy storage of the motor vehicle can be achieved. The initially described US 2015/0306974 A1 shows an arrangement in which cooled air from a charging device the Air-refrigerant heat exchanger is supplied. This air-coolant heat exchanger corresponds to an engine radiator, which is designed for cooling the engine by means of wind.

In contrast, in the charging station according to the invention, the conditioned or cooled air can be supplied to the motor vehicle by means of the air connection device. For example, the air connection device comprises, in addition to the connection element, a hose which is connected by means of the connection element to a location of the motor vehicle to which fresh air for vehicle interior air conditioning of the motor vehicle is drawn, in particular the supply air channel. This location is usually below a windshield of the motor vehicle. By means of the charging station is a supply of cold air in an air intake for an air conditioning in particular the supply air duct of the ventilation device of the motor vehicle possible, which is possible in all current motor vehicles without further modifications. Normally, three to four kilowatts of a temperature control system of the motor vehicle are required for vehicle interior cooling of the motor vehicle. This is no longer necessary with the charging station according to the invention, since the vehicle interior of the motor vehicle can be cooled by the air from the charging station. Thus, a total cooling capacity of the motor vehicle can be used for cooling the energy storage of the motor vehicle. The charging station according to the invention also has the advantage that an infrastructure of respective motor vehicles are relocated to each charging station, resulting in a total of particularly low investment costs. In particular, only one investment per charging station is required instead of a respective investment in a plurality of connectable to the charging station motor vehicles.

In an advantageous embodiment of the invention, it is provided that the connection element comprises at least one suction gripper or suction cup which can be connected to the motor vehicle and / or a magnet device which can be connected to the motor vehicle. In other words, the connecting element by means of negative pressure and / or by magnetic force with the motor vehicle, in particular with the supply air duct of the motor vehicle connectable. The suction pad and / or the suction cup can be acted upon by a negative pressure and fixed by means of the negative pressure to an outer side of the motor vehicle and / or on an inner wall of the supply air duct of the motor vehicle. When mounting the connection element by means of magnetic force on the motor vehicle, the magnetic device of the connection element can be brought into engagement with a corresponding magnet unit of the motor vehicle. For example, the supply air channel may have a paramagnetic material which can be brought into engagement with the magnetic device of the connection element.

In a further advantageous embodiment of the invention, an electrically operable drive device is provided, by means of which the air connection device is movable relative to the motor vehicle and connectable to the motor vehicle. For example, the drive device comprises a position detection device, by means of which a position of the supply air duct relative to the charging station can be detected and depending on the detected relative position, the air connection means by means of the drive means relative to the motor vehicle and to the supply air duct of the motor vehicle is movable. As a result, the charging station for a driver of the motor vehicle is particularly conveniently connected to the motor vehicle, since, for example, no action of the driver is required to trigger the connection of the air connection device to the motor vehicle by means of the drive device.

Another aspect of the invention relates to a method for operating a charging station for charging an energy store of a motor vehicle. In the method, electrical energy for charging the energy store is provided by means of an energy supply device of the charging station. Furthermore, air is cooled by means of an air supply device of the charging station and the cooled air is made available via an air connection device connected to the motor vehicle and transmitted to the motor vehicle. In particular, air is taken from an environment of the charging station by means of the air supply device and cooled by means of a compression refrigeration system before the air is provided for the motor vehicle. The energy supply device of the charging station may comprise, for example, a buffer memory device, by means of which electrical energy is stored and provided for charging in an existing connection to the motor vehicle for the energy store. Alternatively or additionally, the energy supply device can have a network connection, by means of which the energy supply device receives electrical energy from a power network. The electrical energy of the energy supply device received from the power network can be stored, for example, in the buffer memory device and / or provided bypassing the buffer memory device for the motor vehicle. In particular, the energy supply device converts the electrical energy received from the power grid before providing for the motor vehicle.

In order to allow a particularly advantageous charging of the energy storage, the air connection device has at least one fluidically with at least one supply air duct for aeration a vehicle interior of the motor vehicle trained ventilation device of the motor vehicle connected connection element, via which the cooled air is supplied to the supply air duct. In other words, the connection element of the air connection device is fluidically connected to the supply air duct of the ventilation device of the motor vehicle in order to provide the cooled air for the motor vehicle via the connection element. Thus, a cooling power for cooling the vehicle interior of the motor vehicle can be provided by the charging station, so that a cooling power of the motor vehicle is at least substantially completely ready for cooling the energy storage of the motor vehicle when charging it with electrical energy. As a result, a particularly efficient cooling of the energy storage of the motor vehicle during its loading is possible. This makes it possible for a particularly high charging power to be transferred from the charging station to the energy store of the motor vehicle since the charging power can be kept particularly high at a particularly low temperature of the energy store and does not have to be kept particularly low as a result of a high temperature of the energy store. As a result, particularly short charging times of the energy storage are possible.

A further aspect of the invention relates to a method for operating the motor vehicle, in which at least one energy store of the motor vehicle is charged with electrical energy by receiving the electrical energy provided by a charging station by means of the motor vehicle. Furthermore, in the method by means of the motor vehicle, cooled and provided air is received by means of the charging station. This air is actively cooled by means of the charging station, for example by means of a compression refrigerating machine, and then provided for the motor vehicle. For a particularly advantageous charging of the energy storage device, the motor vehicle comprises a ventilation device designed for ventilating the vehicle interior of the motor vehicle with at least one supply air duct via which the motor vehicle receives the air cooled and provided by means of the charging station. This means that the supply air duct receives the air cooled by means of the charging station, wherein the vehicle interior of the motor vehicle can be ventilated by means of the cooled air. Thus, the cooled air can be used via the ventilation device for ventilating the vehicle interior of the motor vehicle, so that a cooling capacity of the motor vehicle can be used at least substantially completely for cooling the energy storage. In this way, a temperature of the energy storage can be kept particularly low, resulting in particularly short charging times of the energy storage.

In this context, it has proved to be advantageous if the air is supplied to the vehicle interior. This means that the cooled air received by the charging station by means of the supply air channel flows through the ventilation device of the motor vehicle and is subsequently supplied to the vehicle interior. Thus, advantageously, the air flowing through the supply air duct into the vehicle interior does not have to be cooled by means of the ventilation device in order to set a humidity and / or a temperature of the air supplied to the vehicle interior.

In a further advantageous embodiment of the invention, it is provided that the energy store is cooled by means of the received air. In this way, a self-cooling capacity of the motor vehicle for cooling the energy storage can be kept particularly low or the energy storage means of the self-cooling performance of the motor vehicle can be cooled to a particularly low temperature together with the cooled air received from the charging station, so that the energy storage can be charged with a particularly high charging power , This results in a particularly short charging time for a charging cycle of the energy storage.

In this context, it has proven to be further advantageous if the received air is supplied to a heat exchanger, by means of which the energy store is cooled. For example, heat is removed from the energy store by means of a coolant and released via the heat exchanger to the received air. This means that heat is transferred from the coolant to the received cooled air in the heat exchanger, so that the coolant is cooled as it flows through the heat exchanger. By means of the cooled coolant, in turn, heat can be absorbed by the energy store and transported away from the energy store. In this case, the air can be supplied to the vehicle interior of the motor vehicle after flowing through the heat exchanger in its heated by receiving heat from the energy storage state. This can be adjusted by adjusting a respective mass flow of the coolant through the heat exchanger and a temperature of the air after flowing through the heat exchanger and at inflows into the vehicle interior of the motor vehicle. This allows a particularly advantageous temperature of the vehicle interior of the motor vehicle with a simultaneous cooling of the energy storage.

It has been shown to be advantageous in a development when the received air is passed bypassing the vehicle interior to an environment of the motor vehicle. With In other words, the air is received by means of the supply air duct of the motor vehicle and then flows into the heat exchanger, in which the cooled received air absorbs heat via the coolant from the energy storage. If the air heated in flows of the heat exchanger air is not required for ventilating the vehicle interior of the motor vehicle, it is advantageous to supply the air after flowing through the heat exchanger, bypassing the vehicle interior of the motor vehicle of the environment of the motor vehicle. Alternatively, the air can be partially supplied to the vehicle interior of the motor vehicle after flowing through the heat exchanger and partially bypassing the vehicle interior of the motor vehicle, the environment of the motor vehicle are supplied. In this case, a heat absorption from the energy store of the motor vehicle to the air can be set via a mass flow of the air flowing through the heat exchanger.

In a further advantageous embodiment of the invention it is provided that the received air is supplied to an evaporator of the ventilation device. This means that the received air can flow to the evaporator and flow around. By means of the evaporator, the received air can be further cooled. Thus, the air can be cooled by means of a particularly low energy input in the evaporator to a particularly low temperature. Thus, from the perspective of the motor vehicle, a particularly efficient cooling of the air is possible. After cooling the air to the particularly low temperature, the air can be heated by means of the heat exchanger and / or by means of an electrically operable heating element to adjust a humidity and a temperature of the air. The heated air can then be directed into the vehicle interior of the motor vehicle in order to temper it particularly efficiently. Due to the cooling of the air by means of the evaporator to the particularly low temperature exists when flowing through the heat exchanger between the air and the coolant, a particularly large temperature difference, so that by means of the air a lot of heat can be absorbed by the coolant to thereby cool the energy storage particularly advantageous ,

Advantages and advantageous embodiments of the charging station according to the invention are to be regarded as advantages and advantageous embodiments of the inventive method and vice versa.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings. The features and feature combinations mentioned above in the description as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures can be connected not only in the respectively indicated combination but also in other combinations or in isolation, without the scope of To leave invention.

• 1 eine schematische Schnittansicht einer Ladestation zum Laden eines Energiespeichers eines Kraftfahrzeugs mit einer Energiebereitstellungseinrichtungen und einer Luftbereitstellungseinrichtung;
• 2 ein Fließschema eines Temperierungssystems eines elektrisch betreibbaren Kraftfahrzeugs mit einem Batteriekühlkreislauf, einem Kühlkreislauf sowie einem Erwärmkreislauf;
• 3 eine schematische Schnittansicht des Kraftfahrzeugs sowie des Temperierungssystems; und
• 4 eine schematische Schnittansicht einer Belüftungseinrichtung des Kraftfahrzeugs zum Belüften eines Fahrzeuginnenraums des Kraftfahrzeugs.

Showing:

• 1 a schematic sectional view of a charging station for charging an energy storage device of a motor vehicle with an energy supply devices and an air supply device;
• 2 a flow diagram of a Temperierungssystems an electrically operable motor vehicle with a battery cooling circuit, a cooling circuit and a heating circuit;
• 3 a schematic sectional view of the motor vehicle and the Temperierungssystems; and
• 4 a schematic sectional view of a ventilation device of the motor vehicle for ventilating a vehicle interior of the motor vehicle.

In 1 is a charging station in a schematic sectional view 10 for charging an energy store 12 of a motor vehicle 14 shown. In the motor vehicle 14 it is an electrically operable motor vehicle, in this case an electric vehicle. This motor vehicle 14 includes an electric machine 16 , which by means of energy storage 12 can be supplied with energy and by means of which the motor vehicle 14 is drivable. For controlling the electric machine 16 has the motor vehicle 14 a power electronics 18 on. In the energy storage 12 , by means of which the electrical energy for the electric machine 16 In the present case, this is a high-voltage energy store, which is also referred to as a traction battery. When charging the energy storage 12 is by means of an energy supply device 20 the charging station 10 electrical energy for charging the energy storage 12 provided.

The charging station 10 includes the energy supply device 20 by means of which via a charging port 22 electrical energy for charging the energy store 12 is available. In addition, the charging station includes 10 an air supply device 24 by means of which air 80 Coolable and the cooled air 80 for the motor vehicle 14 is available. In the present case by means of a suction device 26 the charging station 10 Air from an environment of the charging station 10 sucked and the air supply device 24 fed. In the air supply device 24 will be from the Present day environment cooled air by means of a compression refrigeration machine.

Furthermore, the charging station 10 an air connection device 28 on, by means of which the air supply device 24 with the motor vehicle 14 is connectable. By means of the air connection device 28 is that by means of the air supply device 24 cooled and provided air 80 to the motor vehicle 14 transferable. Thus, during the charging process of the energy storage 12 by means of the air supply device 24 the charging station 10 air 80 cooled and the cooled air 80 about with the motor vehicle 14 connected air supply device 24 provided and to the motor vehicle 14 transfer.

To a particularly advantageous temperature of the motor vehicle 14 to allow the air connection device 28 at least one connecting element 30 on, by means of which the air connection device 28 fluidic with at least one supply air duct 32 one for ventilating the vehicle interior 34 of the motor vehicle 14 trained ventilation device 36 is connectable. This is the vehicle interior 34 of the motor vehicle 14 by means of the air supply device 24 cooled and provided air 80 fed. Thus, the air connection device 28 the at least one fluidically with the at least one supply air duct 32 the for ventilating the vehicle interior 34 of the motor vehicle 14 trained ventilation device 36 of the motor vehicle 14 connected connection element 30 on, over which the cooled air 80 the supply air duct 32 is supplied.

The air connection device 28 , In the present case has a flexible hose, which with the air supply device 24 is connected and with the supply air duct 32 of the motor vehicle 14 is connectable to the preconditioned air, which in particular is cold and has a desired moisture from the charging station 10 to the supply air duct 32 to lead. The connection element 30 has one with the motor vehicle 14 connectable magnetic device on. By means of the magnetic device, the hose of the air connection device 28 with a hood 38 of the motor vehicle 14 get connected. This can be an outflow 40 the air connection device 28 with an inflow opening 42 of the supply air duct 32 be brought into overlap or, as present in 1 is shown, the outflow opening 40 within the supply air duct 32 to be ordered. In an alternative embodiment, not shown, the connecting element 30 at least one with a windshield of the motor vehicle 14 have connectable suction cup. Between the air connection device 28 and the supply air duct 32 does not necessarily have a fluidly sealed connection, as one of the aeration device 36 generated intake pressure the air 80 in the supply air duct 32 which sucks. However, there should be a loss of air 80 be kept particularly low in the area of the connection to an energy consumption for cooling the air 80 by means of the air supply device 24 keep as low as possible. The charging station 10 should the air 80 at a slightly higher pressure than ambient pressure to provide a pressure drop within the hose of the air conditioning device 28 to compensate. A fan 44 the ventilation device 36 could additionally create a negative pressure by means of which the air 80 in the supply air duct 32 is sucked in.

The air connection device 28 can be manually or by means of an electrically operable drive device 46 with the motor vehicle 14 connected or from the motor vehicle 14 be separated. This can be a communication between the motor vehicle 14 and the charging station 10 for controlling the electric drive device 46 be used.

In 4 is a tempering system in a process flow diagram 48 of the motor vehicle 14 shown. In the temperature control system 48 is a battery circuit 50 thermally with a cooling circuit 52 coupled. The cooling circuit 52 is again with a heating circuit 54 thermally coupled.

By means of the battery circuit 50 is heat from the energy store 12 receivable and via a first cooler 56 to the first radiator 56 circulating airstream deliverable. Alternatively or additionally, the battery circuit 50 Heat from the energy storage 12 via a first heat exchanger 58 to the cooling circuit 52 transfer. A corresponding heat flow from the energy store 12 on the first heat exchanger 58 is with an arrow 60 characterized. The battery circuit 15 in the present case comprises a first cooling medium, by means of which the heat from the energy storage 12 on the first radiator 56 and / or the first heat exchanger 58 is transferable, wherein the first cooling medium by means of pumps 62 is promoted in a circle.

About the first heat exchanger 58 is the battery circuit 50 with the cooling circuit 52 connected. The cooling circuit 52 includes the first heat exchanger 58 , an evaporator 64 leading to the first heat exchanger 58 is connected in parallel, and one in series with the first heat exchanger 58 and the evaporator 64 connected second heat exchanger 66 , About the second heat exchanger 66 can by means of the first heat exchanger 58 and / or the evaporator 64 in the cooling circuit 52 introduced heat to the heating circuit 54 be delivered. In the cooling circuit 52 a second cooling medium is circulated, which means a pump 62 , which is part of a compressor 98 is being promoted. Upstream of the evaporator 64 and upstream of the first heat exchanger 58 becomes the second cooling medium by means of at least one expansion device, in this case the expansion valves 68 expanded. In the cooling circuit 52 it is thus a heat pump cycle. Inside the cooling circuit 52 is that of the energy store 12 to the first heat exchanger 58 transferred heat flow 60 to the second heat exchanger 66 transferable, with the corresponding heat flow with an arrow 70 is marked.

The heating circuit 54 includes the second heat exchanger 66 , a second cooler 72 and a third heat exchanger 74 , In the heating circuit 54 are the third heat exchanger 74 and the second cooler 72 connected in parallel. By means of a 3-way valve 76 a respective one is the second radiator 72 and the third heat exchanger 74 flowing mass flow of a third cooling medium adjustable. The third cooling medium is by means of a pump 62 circulated and serves to transfer heat from the second heat exchanger 66 on the vehicle interior 34 of the motor vehicle 14 supplyable air 80 which the third heat exchanger 74 flows through. This is a with 78 characterized heat flow over the third cooling medium from the second heat exchanger 66 to the third heat exchanger 74 transfer.

The means of air supply device 24 provided air 80 flows through the supply air duct first 32 and then the evaporator 64 flow through. This can be the air 80 by means of the evaporator 64 be further cooled. Then the air can 80 bypassing the third heat exchanger 74 the vehicle interior 34 of the motor vehicle 14 be supplied. Alternatively, the air 80 at least partially after flowing through the evaporator 64 the third heat exchanger 74 be supplied for heating. Subsequently, the heated air 80 the vehicle interior 34 of the motor vehicle 14 be supplied or at least partially bypassing the vehicle interior 34 an environment of the motor vehicle 14 be supplied.

The battery circuit 50 , the cooling circuit 52 and the heating circuit 54 can each have at least one temperature sensor 82 by means of which a respective temperature of the cooling media can be detected, wherein the pumps 62 depending on the respective detected temperature of the cooling media are controllable.

In 3 is a schematic sectional view of the motor vehicle 14 with the temperature control system 48 in an alternative embodiment as well as with the aeration device 36 shown. The temperature control system 48 The alternative embodiment essentially corresponds to that in connection with 2 described tempering system 48 , In 3 However, there are two additional heating elements 84 intended. In addition, the cooling circuit 52 in 3 with the second cooler 72 connected. As in 3 can be detected, is the energy storage 12 with the energy supply device 20 via its charging port 22 connected. About the charging port 22 becomes the energy store 12 of the motor vehicle 14 charged with electrical energy by means of the motor vehicle 14 from the charging station 10 provided electrical energy is received. Furthermore, in 3 be recognized that by means of the motor vehicle 14 by means of the charging station 10 cooled and provided air 80 Will be received. For this purpose, the motor vehicle 14 for ventilating the vehicle interior 34 of the motor vehicle 14 trained ventilation device 36 with the at least one supply air duct 32 on, over which the motor vehicle 14 by means of the charging station 10 cooled and provided air 80 receives. Alternatively or additionally, the ventilation device 36 circulating air 86 from the vehicle interior 34 of the motor vehicle 14 remove and by means of the blower 44 through the evaporator 64 and / or through the third heat exchanger 74 perform and then the environment of the motor vehicle 14 or at least partially the vehicle interior 34 of the motor vehicle 14 respectively. By means of a switching element 88 is a ratio of by means of the blower 44 sucked and received air 80 and by means of the blower 44 sucked circulating air 86 adjustable.

It is assumed below that a means of the blower 44 sucked air mixture 90 is completely out of the received air 80 is formed. The air 80 can, as in 4 is shown, entirely the evaporator 64 to be further cooled or at least fed to flow through. In the illustrations in 3 is a first bypass door 92 provided by means of which the air 80 on the evaporator 64 can be passed over, so the air 80 the evaporator 64 bypasses. Downstream of the evaporator 64 can the air 80 the third heat exchanger 74 be supplied to them to flow through and thereby heated. To bypass the third heat exchanger 74 is a second bypass door 94 provided by means of which the air 80 at the third heat exchanger 74 is passed and thus the third heat exchanger 74 bypasses. Downstream of the third heat exchanger 74 can the air 80 the vehicle interior 34 of the motor vehicle 14 be supplied or at least partially bypassing the vehicle interior 34 the environment of the motor vehicle 14 be supplied. To the the vehicle interior 34 air to be supplied 80 to adjust is a third bypass flap 96 intended. By means of the third bypass flap 96 is the air 80 at least partially over in usual motor vehicles 14 already existing air ducts in the environment of the motor vehicle 14 dischargeable. The third bypass door 96 allows that by means of the cooled air 80 Heat over the third heat exchanger 74 from the heating circuit 54 and thus indirectly from the energy storage 12 is recorded and the environment of the motor vehicle 14 is supplied, if in the vehicle interior 34 of the motor vehicle 14 no need or less need than the charging station 10 can supply, at supplied air 80 consists.

Electric vehicles require that their batteries be set at a temperature not lower than 10 to 20 degrees Celsius or above 40 to 60 degrees Celsius. To this temperature interval in the energy storage 12 set, which may be below an ambient temperature, electric vehicles are provided with cooling systems, which are cooled by a refrigeration system, which is coupled to a vehicle interior ventilation device. It may be a challenging operating condition for a cooling system or a refrigeration system at the same time the vehicle interior 34 and the energy storage 12 of the motor vehicle 14 to cool. Particularly energy-consuming here is a cooling or dehumidifying the vehicle interior 34 while a vehicle occupant is in the vehicle interior 34 is located and the energy storage 12 by means of the charging station 10 is loaded, especially fast loading. A fast charging of the energy storage 12 requires particularly high charging power which leads to a particularly high heat generation in the energy storage 12 being able to lead. Charging powers, which are used in fast charging, are at a temperature of the energy storage 12 customized. This is intended to the temperature of the energy storage 12 below an upper limit of 40 to 60 degrees Celsius of the acceptable temperature range for the energy storage 12 being held. A reduction of the charging power leads to an increase in a time, which is required for the energy storage 12 to load. To the energy storage 12 charging within a particularly short period of time is adequate cooling of the energy store 12 and possibly additionally an associated charging system necessary.

It could be particularly advantageous to the tempering system 48 of the motor vehicle 14 especially small and instead a cooling capacity of the charging station 10 particularly high perform.

It is expected that the fast charging at the charging station 10 compared to an overnight load at home with the driver of the motor vehicle 14 less often used. Slow home charging required in the motor vehicle 14 only a cooling system with a very low cooling capacity. A presence of a particularly large cooling capacity of the charging station 10 There may be a need for a large and underutilized cooling system in the motor vehicle 14 replace. As a result, this cooling system attributable costs, weight and influence on a driving behavior of the motor vehicle fall 14 such as an acceleration away.

One during fast charging of the energy storage 12 additionally provided cooling capacity is possibly only required in regions which have particularly high outside temperatures and this only in appropriate times of a year in which the outside temperature is particularly high. Consequently, only charging stations can 10 with the air supply device 24 equipped, which are arranged in the regions with particularly high outside temperatures. Compared to equipping a plurality of motor vehicles 14 with a very large cooling system for cooling the energy storage 12 during fast loading around all motor vehicles 14 to prepare for the particularly high outside temperatures in which these may possibly be arranged, is the equipping of the corresponding charging stations 10 with the air supply device 24 the better solution.

By means of the charging station 10 It is possible to use both the vehicle interior 34 as well as the energy storage 12 during fast charging of the energy storage 12 by means of the charging station 10 to cool.

The resulting advantages are explained in more detail below.

The from the charging station 10 received air 80 which the evaporator 64 flows through is particularly cold, so by means of the evaporator 64 associated expansion valve 68 which is in 2 is shown, especially little second cooling medium the evaporator 64 is supplied. As a result, a particularly large amount of second cooling medium can pass through the first heat exchanger 58 supplied to thereby heat from the energy storage 12 dissipate and absorb. By this cooling of the energy store 12 can a reduction of the charging power, by means of which the energy storage 12 is charged, avoided and thus a particularly long charging time of the energy storage 12 be avoided. Thus, a particularly fast charging of the energy storage 12 by means of the charging station 10 possible.

Another advantage is that a cooling capacity of the temperature control system 48 can be used particularly advantageous. The temperature of the second cooling medium must not be below 2 degrees Celsius if the second cooling medium is the evaporator 64 flows through to freezing of humidity on a surface of the evaporator 64 to avoid. Will the second cooling medium due to the particularly low temperature of the received air 80 bypassing the evaporator 64 the second heat exchanger 58 fed, the second cooling medium can be cooled to a temperature below 2 degrees Celsius. By removing a restriction on the temperature of the second cooling medium, that in the cooling circuit 52 arranged compressor 98 be operated at very high speeds, with a particularly high compression speed of the compressor 98 leads to a particularly low temperature of the second cooling medium. A resulting high mass flow in the compressor 98 and a particularly high temperature difference between the second cooling medium and the first cooling medium in the first heat exchanger 58 allows the first heat exchanger 58 extra heat from the battery circuit 50 on the cooling circuit 52 transfers and thus the energy storage 12 cools particularly advantageous. It can thus by means of the first heat exchanger 58 a particularly large heat flow 60 from the energy store 12 be dissipated. A particularly high of the energy storage 12 dissipated heat flow 60 allows particularly high charging power for charging the energy storage 12 for a particularly long time and thus a particularly fast charging of the energy storage 12 ,

Another advantage of the charging station 10 lies in the fact that a particularly advantageous cooling of the energy storage 12 can be reached. The of the energy storage 12 to the first heat exchanger 58 transferred heat flow 60 gets over the cooling circuit 52 by means of the second heat exchanger 66 to the second radiator 72 and / or the third heat exchanger 74 issued. A lot of heat coming through the second cooler 72 to the environment of the motor vehicle 14 could be delivered in particular at a standstill of the motor vehicle 14 be limited because a particularly high fan speed of the second cooler 72 leading to a circle of hot air in the area of the second radiator 72 can lead. The air 80 , by means of which heat via the third heat exchanger 74 from the heating circuit 54 is discharged, by means of the supply air duct 32 over the aeration device 36 in the tempering system 48 brought in. An inlet opening of the supply air duct 32 is usually at a lower edge of a windshield of the motor vehicle 14 arranged. The sucking in of the air 80 At this point, a circuit guidance of hot air can at least substantially avoid.

Further advantageous are cost and weight advantages due to particularly small designed cooler 56 . 72 and the particularly small running third heat exchanger 74 , Providing the cooled air 80 by means of the charging station 10 for the supply air duct 32 of the motor vehicle 14 allows that by means of the third heat exchanger 74 a lot of heat from the heating circuit 54 and thus over the heat flows 60 . 70 . 78 from the energy store 12 is transported away. Because the air 80 Provided cooled, the vehicle interior 34 supplied air 80 even after absorption of heat through the third heat exchanger 74 have a desired temperature. If the of the charging station 10 provided air 80 not cool enough to a cooling requirement of the vehicle interior 34 To satisfy, the evaporator can 64 additional cooling of the air 80 serve.

Moreover, a particularly advantageous range of the motor vehicle 14 and a particularly advantageous thermal comfort in the vehicle interior 34 of the motor vehicle 14 by means of the charging station 10 be enabled. In particularly high outside temperatures, if the energy storage 12 is not sufficiently cooled, a charging power for charging the energy storage 12 be kept particularly low and / or the evaporator 64 supplied second cooling medium for cooling the vehicle interior 34 be supplied particularly low air to be supplied. This allows a thermal comfort in the vehicle interior 34 by a corresponding control of the motor vehicle 14 be particularly low. This scenario can be avoided or delayed by providing the cooled air 80 by means of the charging station 10 , In addition, provides a well-tempered vehicle interior 34 sure that if the motor vehicle 14 from the charging station 10 drive away, the temperature control system 48 at least substantially not for cooling the vehicle interior 34 must be used. As a result, particularly much of the energy storage 12 stored electrical energy for moving the motor vehicle 14 be used so that particularly long ranges with a battery charge of the energy storage 12 are reachable.

Moreover, advantageously, an economic advantage by means of the charging station 10 achievable, because of the particularly high thermal comfort, the particularly high range and the particularly fast charging in current motor vehicles 14 to a preference of customers with regard to the charging station 10 can lead.

Furthermore, the charging station 10 advantageously with already existing motor vehicles 14 , in particular electric vehicles compatible. By providing the cooled air 80 by means of the charging station 10 Only changes to current charging stations are necessary to this to the charging station 10 rebuild. tempering systems 48 of many, if not all motor vehicles 14 have expansion valves 68 on, by means of which by the evaporator 64 flowing second cooling medium is adjustable. All these vehicles 14 , even conventional motor vehicles, thus can from the provided cooled air 80 the charging station 10 benefit.

An alternative solution to cooled air 80 for the vehicle interior 34 would be to provide the motor vehicle 14 to arrange in a refrigerated environment. A particularly large surface area of this cooled environment exposed to another uncooled environment could result in a particularly high cost of providing particularly good insulation of the extra large surface area. Alternatively, a great deal of heat would flow from the cooled environment to the wider environment, resulting in particularly high energy consumption for cooling the refrigerated environment. In contrast to this is the charging station 10 the cooled air 80 only when flowing through the hose over a surface of the hose and in the vehicle interior 34 of the motor vehicle 14 exposed to the environment. Furthermore, would advantageously at the charging station 10 hot air flowing away from the coolers need not be cooled, whereas in an arrangement of the motor vehicle 14 in the refrigerated environment these hot air flowing away from the coolers would have to be cooled. Thus, the charging station 10 while providing the cooled air 80 particularly energy efficient.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• US 2015/0306974 A1 [0002, 0006]

Claims (10)

Charging station (10) for charging an energy store (12) of a motor vehicle (14), with an energy supply device (20), by means of which electrical energy for charging the energy store (12) can be provided, with an air supply device (24), by means of which air (80 ) and the cooled air (80) can be provided, and with an air connection device (28), by means of which the air supply device (24) is connectable to the motor vehicle (14), whereby the air cooled and provided by the air supply device (24) ( 80) can be transferred to the motor vehicle (14), characterized in that the air connection device (28) has at least one connection element (30), by means of which the air connection device (28) is fluidically connected to at least one supply air channel (32) for venting the vehicle interior (34 ) of the motor vehicle (14) formed ventilation device (36) of the motor vehicle (14) connectable is, whereby the vehicle interior (34) of the motor vehicle (14) by means of the air supply device (24) cooled and provided air (80) can be fed. Charging station (10), after Claim 1 , characterized in that the connecting element (30) comprises at least one with the motor vehicle (! 4) connectable suction pads and / or with the motor vehicle (14) connectable magnetic device. Charging station (10) after Claim 1 or 2 , characterized in that an electrically operable drive means (46) is provided, by means of which the air connection device (28) relative to the motor vehicle (14) is movable and connectable to the motor vehicle (14). Method for operating a charging station (10) for charging an energy store (12) of a motor vehicle (14), in which: - electrical energy is provided for charging the energy store (12) by means of an energy supply device (20) of the charging station (10); - Air (80) cooled by means of an air supply device (24) of the charging station (10) and the cooled air (80) via a motor vehicle (14) connected to the air connection device (28) and transmitted to the motor vehicle (14); characterized in that the air connection device (28) has at least one connection element (30) connected fluidically to at least one supply air channel (32) of a ventilation device (36) of the motor vehicle (14) designed to ventilate the vehicle interior (34) of the motor vehicle (14) which the cooled air (80) is supplied to the supply air duct (32). Method for operating a motor vehicle (14), in which - At least one energy storage (12) of the motor vehicle (14) is charged with electrical energy by the means of the motor vehicle (14) from a charging station (10) provided electrical energy is received; and - By means of the motor vehicle (14) by means of the charging station (10) cooled and provided air (80) is received; characterized in that the motor vehicle (14) has a venting device (36) designed to ventilate the vehicle interior (34) of the motor vehicle (14) with at least one supply air duct (32) via which the motor vehicle (14) is moved by means of the charging station (10). cooled and provided air (80) receives. Method according to Claim 5 , characterized in that the air (80) is supplied to the vehicle interior (34). Method according to Claim 5 or 6 , characterized in that by means of the received air (80) of the energy store (12) is cooled. Method according to Claim 7 , characterized in that the received air (80) is fed to a heat exchanger (74), by means of which the energy store (12) is cooled. Method according to Claim 8 , characterized in that the received air (80), bypassing the vehicle interior (34) to an environment of the motor vehicle (14) is passed. Method according to one of Claims 5 to 9 , characterized in that the received air (80) is fed to an evaporator (64) of the aeration device (36).

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