DE102014207597A1 - A regenerative fuel cell device for a motor vehicle and method for varying a temperature in a vehicle interior - Google Patents

Abstract

The invention relates to a regenerative fuel cell device (10) for a motor vehicle which is designed to carry out an endothermic electrolysis while consuming a supplied current and to generate electricity by means of an endothermic electrolysis reversible exothermic reaction, wherein the regenerative fuel cell device (10) in such a way designed and directly or indirectly connected to a heat transfer device (14) of the motor vehicle and / or sorption of a motor vehicle (16) that a waste heat (12) of the regenerative fuel cell device (10) at least partially to the heat transfer device (14) can be forwarded and / or at least one subunit (18) of the sorption refrigeration machine (16) can be heated by means of at least part of the waste heat (12) of the regenerative fuel cell device (10). Furthermore, the invention relates to a method for varying a temperature in a vehicle interior of a motor vehicle equipped with a regenerative fuel cell device (10).

Description

The invention relates to a regenerative fuel cell device for a motor vehicle. Likewise, the invention relates to a Fahrzeugtemperiersystem for a motor vehicle and an energy supply system for an electric drive motor of a motor vehicle. Furthermore, the invention relates to a method for varying a temperature in a vehicle interior of a motor vehicle equipped with a regenerative fuel cell device.

State of the art

In the DE 10 2004 027 433 A1 For example, a vehicle having a battery as a first energy storage and a hydrogen tank as a second energy storage is described. The hydrogen tank can be filled with a hydrogen produced by an electrolyzer. The electrolyzer and the battery are connectable to an external power source such that first the battery is rechargeable, and from exceeding a predetermined state of charge of the battery, the energy of the external power source for generating hydrogen for filling the hydrogen tank is usable. If energy is required to operate an electric machine as a drive unit, then its energy is first used up to a predetermined state of charge of the battery, and then hydrogen is consumed from the hydrogen tank in an internal combustion engine as fuel for generating energy. Instead of the electrolyzer and the internal combustion engine and a reversible fuel cell should be used.

Disclosure of the invention

The invention provides a regenerative fuel cell device, a vehicle temperature control system for a motor vehicle, a power supply system for an electric drive motor of a vehicle, an electric vehicle, and a method for varying a temperature in a vehicle interior of a motor vehicle equipped with a regenerative fuel cell device.

Advantages of the invention

The present invention provides possibilities for heating or cooling a vehicle interior of a motor vehicle by utilizing the waste heat of the regenerative fuel cell device occurring during the endothermic electrolysis and / or the reversible exothermic reaction. As will be explained in more detail below, when using the present invention, heating or cooling of the vehicle interior to a comfortable temperature for a vehicle occupant is possible even at extreme outdoor temperatures with virtually zero energy consumption (in addition to waste heat). By means of the present invention, a fuel consumption / power consumption necessary for heating or cooling the vehicle interior is thus significantly reduced. The present invention thus contributes to energy saving and environmental protection.

For example, the vehicle interior can be heated by means of the waste heat of the regenerative fuel cell device that is at least partially passed on by the heat transfer device. The waste heat generated in the regenerative fuel cell device allows a generous heating of the vehicle interior even at extreme outside temperatures. Thus, even in winter energy-saving and low-power driving with a comfortable temperature in the vehicle interior is possible.

As an alternative or as a supplement thereto, the vehicle interior can be cooled by means of the sorption refrigeration machine. In addition to a comfortable, energy-saving and low-power driving in winter can thus be achieved even in extremely summery temperatures, a pleasant temperature in the vehicle interior while maintaining the advantages mentioned above.

In an advantageous embodiment of the regenerative fuel cell device, the sorption refrigeration machine comprises an absorption refrigerating machine and an expeller can be heated as a subunit of the sorption refrigerating machine by means of at least the part of the waste heat of the regenerative fuel cell device. In this way, the vehicle interior can be cooled energy-saving and environmentally friendly. As an alternative or as a supplement thereto, the sorption refrigeration machine can also comprise an adsorption refrigeration machine, as a result of which a cold storage can be realized.

Preferably, the regenerative fuel cell device is connectable directly or indirectly to an electric drive motor of the vehicle such that the current generated by the regenerative fuel cell device can be output to the electric drive motor. The regenerative fuel cell device, which can be used so advantageously for heating or cooling the vehicle interior, can thus also be used to ensure a power supply to the electric drive motor. In particular, the regenerative fuel cell device can be used as a supplement to a battery, such as a conventional Li-ion battery. By the additional use of the regenerative fuel cell device together with the battery For example, a storage capacity and an energy density of a power supply system formed of the regenerative fuel cell device and the battery can be increased. In this case, the potential weight advantage of the regenerative fuel cell device over an additionally used second battery can be used.

In an advantageous embodiment, the regenerative fuel cell device is designed to split water into hydrogen and oxygen as endothermic electrolysis while consuming the provided current and to generate electricity by means of the reversible exothermic reaction of hydrogen and oxygen to form water. Such a regenerative fuel cell device is relatively easy and inexpensive to produce. It should be understood, however, that the invention is not limited to the use of this type of regenerative fuel cell device. Instead, other exothermic and endothermic reactions can be carried out by means of the regenerative fuel cell device, wherein the waste heat generated is used for heating or cooling the vehicle interior.

Also advantageous is a vehicle temperature control system for a motor vehicle having such a regenerative fuel cell device, the heat transfer device and / or the sorption refrigeration machine.

The above-mentioned advantages are also ensured in a power supply system for an electric drive motor of a vehicle, which comprises such a regenerative fuel cell device and a battery, by means of which the electric drive motor can be energized, wherein the regenerative fuel cell device and the battery electrically connected to a common electrical interface are, via which a charging current from an external power source such to the regenerative fuel cell device and the battery is provided that the battery is rechargeable and at least one attached to the regenerative fuel cell device memory for an electrolysis product produced in the endothermic electrolysis is refillable. Thus, a "refueling" of the power system is possible despite the additional use of the regenerative fuel cell device while maintaining the purely electrical interface.

In an advantageous embodiment of the energy supply system, the electric drive motor can be supplied with power simultaneously in a booster mode by means of the battery and by means of the regenerative fuel cell device. The realizable parallel supply of the electric drive motor from the battery and the regenerative fuel cell device contributes to the increase of the maximum motor current.

In a further advantageous embodiment, the regenerative fuel cell device and the battery can be connected to the regeneratively operable electric drive motor and / or a generator of the motor vehicle, and a generator current generated by the regeneratively operable electric drive motor and / or the generator is connected to the regenerative fuel cell device and the battery can be provided that the battery is rechargeable and the at least one memory is refillable. The present invention thus also contributes to increasing the energy recovery in recuperative braking.

An electric vehicle with a corresponding regenerative braking device or with such an energy supply system realizes the advantages described above.

Furthermore, the enumerated advantages are also realizable by performing a corresponding method for varying a temperature in a vehicle interior of a motor vehicle equipped with a regenerative fuel cell device. The method is further developable according to the embodiments of the regenerative fuel cell device and the power supply system.

Brief description of the drawings

Further features and advantages of the present invention will be explained below with reference to the figures. Show it:

1a to 1d schematic diagrams and coordinate systems for explaining an operation of an embodiment of the regenerative fuel cell device; and

2 a flowchart for explaining an embodiment of the method for varying a temperature in a vehicle interior of a motor vehicle equipped with a regenerative fuel cell device.

Embodiments of the invention

1a to 1d 12 show schematic representations and coordinate systems for explaining an operation of an embodiment of the regenerative fuel cell device.

In the 1a schematically illustrated regenerative fuel cell device 10 is in a motor vehicle, especially in one Electric vehicle or in a hybrid vehicle, usable. The regenerative fuel cell device 10 is designed to carry out an endothermic electrolysis using a supplied current and to generate electricity by means of an exothermic reaction reversible to the electrolysis. In the embodiment of 1a is the regenerative fuel cell device 10 designed to split water into hydrogen and oxygen as endothermic electrolysis by consuming the supplied stream and to generate electricity by means of the reversible exothermic reaction of hydrogen and oxygen to water (oxyhydrogen reaction). It should be noted that this design of the regerative fuel cell device 10 however, it is only to be interpreted as an example. Preferably, the regenerative fuel cell device is 10 in its activated state so controllable that either the endothermic electrolysis or the exothermic reaction by means of the regerativen fuel cell device 10 is executable.

Both during the endothermic electrolysis and during the exothermic reaction, a waste heat falls 12 the regenerative fuel cell device 10 at. The regenerative fuel cell device 10 is additionally designed and directly or indirectly so to a heat transfer device 14 of the motor vehicle and / or to a sorption refrigeration machine 16 the motor vehicle attachable / tailed that the waste heat 12 the regenerative fuel cell device 10 at least partially to the heat transfer device 14 can be forwarded and / or at least one subunit of the sorption 16 by means of at least part of the waste heat 12 the regenerative fuel cell device 10 is heated. In the embodiment of the 1a is the regenerative fuel cell device 10 both to the heat transfer device 14 as well as to the sorption chiller 16 tethered. The regenerative fuel cell device 10 may also be part of a (compact) Fahrzeugtemperiersystems which the heat transfer device 14 and / or the sorption chiller 16 additionally includes. The regenerative fuel cell device 10 can thus together with the heat transfer device 14 and / or the sorption chiller 16 be designed as a (compact) structural unit.

If the regenerative fuel cell device 10 to the heat transfer device 14 Tethered, the at least partially to the heat transfer device 14 provided waste heat 12 the regenerative fuel cell device 10 in a vehicle interior of a (with the regenerative fuel cell device 10 and the heat transfer device 14 equipped) vehicle, in particular in a passenger compartment, forwarded. In this way, the vehicle interior is by means of the heat transfer device 14 at least partially passed on waste heat 12 the regenerative fuel cell device 10 heated. Thus, the waste heat 12 the regenerative fuel cell device 10 be used for heating the vehicle interior, whereby at least less fuel and / or less electrical energy is needed for vehicle heating. In particular, the waste heat 12 the regenerative fuel cell device 10 be sufficient for comfortable heating of the vehicle interior. The usability of the waste heat described here 12 the regenerative fuel cell device 10 thus reduces energy consumption of a vehicle during heating.

Under the sorption chiller 16 can z. B. a Sorptionsklimaanlage be understood. The sorption chiller 16 in particular, an absorption chiller 16 or an adsorption chiller. As will be explained in more detail below, by means of heating at least one subunit of the sorption chiller 16 by means of at least the part of the waste heat 12 the regenerative fuel cell device 10 the vehicle interior by means of the sorption chiller 16 be cooled. Thus, in this case, the waste heat 12 the regenerative fuel cell device 10 be used to at least reduce necessary for cooling the vehicle interior fuel consumption and / or consumption of electrical energy. Also, the waste heat 12 the regenerative fuel cell device 10 sufficient for comfortable cooling of the vehicle interior so far that no fuel consumption and no consumption of electrical energy for cooling the vehicle interior are necessary. Even when cooling the vehicle interior thus energy can be saved.

For example, has a regenerative fuel cell device designed for endothermic cleavage of water and for power generation by the oxyhydrogen gas reaction 10 (especially in fuel cell operation) often waste heat 12 on, which corresponds to at least a thermal power of at least 6.5 kW. This is sufficient for a heating operation, in which even at extreme outside temperatures a good heating of the vehicle interior is achieved to a comfortable temperature. Even for reliable cooling of the vehicle interior to a comfortable temperature, the thermal power of 6.5 kW is sufficient, even in hot outside temperatures.

In an electric vehicle, conventionally, heating or cooling of the vehicle is possible only by means of an increase in the consumption of electric power. Ensuring a pleasant temperature in an electric vehicle requires so in the prior art, a more frequent recharging / refueling of electrical energy. However, this conventional comfort loss is by means of the above-described connection of the regenerative fuel cell device 10 to the heat transfer device 14 and / or to the sorption chiller 16 unrecoverable. A driver is thus encouraged to buy / use an environmentally friendly and quiet electric vehicle.

It is noted, however, that in each type of vehicle by means of the above-described connection of the regenerative fuel cell device 10 to the heat transfer device 14 and / or to the sorption chiller 16 a pleasant interior for a passenger in the vehicle interior in an environmentally friendly and energy-saving manner is guaranteed.

Optionally, at least a portion of the waste heat 12 before forwarding to the heat transfer device 14 and / or to the sorption chiller 16 be cached in a memory. In this way, even during a prolonged existence of the regenerative fuel cell device 10 in a deactivated state, the waste heat 12 at least partially still used for heating or cooling the vehicle interior.

In 1b is one with the regenerative fuel cell device 10 suitable sorption chiller 16 exemplified. The sorption chiller 16 is as an absorption chiller 16 being educated, being an exporter 18 as a subunit of the sorption chiller 16 by means of at least the part of the waste heat 12 the regenerative fuel cell device 10 is heated. In the example shown, the sorption chiller 16 specifically a LiBr / H2O absorption refrigeration system and thus has water as a refrigerant in a refrigerant circuit 20 and an aqueous lithium bromide solution as a solvent in a solvent circuit 22 on.

In an evaporator 24 in the refrigerant circuit 20 becomes liquid water by means of a pump 26 on a pipeline 28 sprayed. The one in the evaporator 24 present pressure is kept so low that on the pipeline 28 sprayed water evaporates, thus cooling one over the pipeline 28 guided cold water, z. B. from 12 ° C to 6 ° C causes. By means of evaporation of water on the pipeline 28 Thus, the cold water heat is removed, so that the cooled cold water for cooling the vehicle interior is available.

To the low pressure in the evaporator 24 Maintaining water vapor is via a pipe 30 from the evaporator to one in the solvent circuit 22 lying absorber 32 transferred and dissolved there in the solvent. The diluted with the water solvent is then by means of another pump 34 from the absorber 32 over a line 36 in the solvent circuit 22 lying expeller 18 pumped. The in the expeller 18 the solvent circuit 22 dischargeable waste heat 12 causes heating of the dilute solvent, whereby water vapor is released, which is from the expeller 18 over a line 38 in one in the coolant circuit 20 lying capacitor 40 can escape. That in the expeller 18 Residual concentrated solvent can be passed through a solution heat exchanger 42 in the absorber 32 to be led back. The in the condenser 40 escaping water vapor condenses there to water, which again by means of the pump 26 from the condenser 40 over a line 44 in the evaporator 24 pumpable and then on the pipeline 28 is sprayable.

The sorption chiller 16 provided waste heat 12 the regenerative fuel cell device 10 can thus be used to maintain a cycle, which is a continuous cooling of the over the pipeline 28 guided cold water allows. A waste heat of the means of 1b The process shown can be done via external heat exchangers 46 and 48 , which are operated for example by means of a water from a cooling tower and / or by means of a differently provided cooling water to be dissipated. Because the pumps 26 and 34 hardly consume energy, the energy required to maintain the process almost exclusively on the waste heat 12 the regenerative fuel cell device 10 covered. This is a vehicle cooling, which hardly consumes the energy resources of the motor vehicle, possible.

Thus, a low cost LiBr / H2O absorption refrigeration system can be used as sorption chiller 16 be used so that even with hot outside temperatures of the vehicle interior by means of the waste heat 12 is pleasantly coolable.

It is also noted that as a sorption chiller 16 an adsorption chiller, ie a sorption chiller 16 with a solid sorbent, can be used. Such a sorption chiller 16 can be under a use of waste heat 12 be used in particular as a cold storage.

In the embodiment of the 1a is the regenerative fuel cell device 10 advantageously such directly or indirectly on one electric drive motor 50 of the motor vehicle connectable / connected, that of the regenerative fuel cell device 10 generated power to the electric drive motor 50 is dispensable. The regenerative fuel cell device 10 forms in particular together with a battery 52 , which is, for example, a lithium-ion battery, a power supply system for the electric drive motor 50 , Also by means of the battery 52 is the electric drive motor 50 supplied with current. The regenerative fuel cell device 10 thus supports the battery 52 , This contributes to an increase in the storage capacity and the energy density of the components 10 and 52 existing energy supply system, especially for an electric vehicle, compared to a conventional vehicle battery at. In addition, in this way, a battery life 52 be increased by reducing the charging and discharging cycles. This also causes a decoupling of power and energy content of the power supply system, while in a conventional use of only a vehicle battery for powering the electric drive motor 50 Power and energy are directly related.

By using the waste heat 12 the regenerative fuel cell device 10 for heating or cooling the vehicle interior hardly any energy of the battery 52 needed to set a comfortable temperature in the vehicle interior. This causes a significant reduction in the consumption of the battery 52 stored energy, especially in an electric vehicle, resulting in additional protection of the battery 52 and a longer and further driving by means of the on the battery 52 stored energy is enabled. A range of one with the regenerative fuel cell device 10 and the battery 52 equipped vehicle after refueling is at least over 200 km steigerbar. An acceptance of an electric vehicle for a driver is thus increased.

The regenerative fuel cell device 10 and the battery 52 are electrically connected to a common electrical interface 54 connected via which a charging current from a vehicle external power source 56 such to the regenerative fuel cell device 10 and to the battery 52 It is possible to provide that battery 52 rechargeable and at least one to the regenerative fuel cell device 10 Tailored storage 58a and 58b for an electrolysis product produced in the endothermic electrolysis is refillable. A "refueling" of the vehicle equipped with the energy supply system is thus possible purely electrically. A direct refill of the at least one memory 58a and 58b is not necessary. Providing the charging current to the regenerative fuel cell device 10 and to the battery 52 can be done either simultaneously or in a predetermined order. The common electrical interface 54 For example, it can be a charging electronics.

By means of an energy manager 60 can the flow of energy between the electric drive motor 50 , the battery 52 and the regenerative fuel cell device 10 be controllable. For example, the driving of the components 10 . 50 and 52 by means of the energy manager 60 done so that the electric drive motor 50 in a booster operation at the same time by means of the battery 52 and by means of the regenerative fuel cell device 10 can be supplied with electric power. In a normal operation of the electric drive motor 50 however, the current flow between the components 10 . 50 and 52 be controlled so that either first the energy of the battery 52 or first on the regenerative fuel cell device 10 Energy stored in the form of the electrolysis products for operating the electric drive motor 50 is consumed.

Optionally, the regenerative fuel cell device may 10 and the battery 52 on the generator-operable electric drive motor 50 and / or a (not outlined) generator of the motor vehicle to be connected / tethered. Preferably, in this case, one of the generator-operable electric drive motor 50 and / or the generator (when braking the motor vehicle) generator power generated in such a way to the regenerative fuel cell device 10 and to the battery 52 Provable that the battery 52 rechargeable and the at least one store 58a and 58b (by performing the endothermic electrolysis) is refillable. The generator current can either simultaneously or in a predetermined order to the battery 52 and to the regenerative fuel cell device 10 be available. The realizable in this way division of the generator current to the battery 52 and the regenerative fuel cell device 10 causes an increase in the amount of energy recovered during recuperative braking. In addition, in this case, during the recuperative braking of the battery 52 output generator current is reducible without a reduction in Rekuperationseffizienz, the battery 52 better spared. This causes an increase in the life of the battery 52 ,

In the embodiment of the 1a For example, the regenerative fuel cell device includes an electrolysis unit 62 (or an electrolyzer) and a fuel cell unit 64 , The electrolysis unit 62 is designed to produce water into hydrogen and oxygen while consuming a supplied current / charge current split. Optionally, de-ionized water can be added to a tank 66 the regenerative fuel cell device 10 be removable. By means of the fuel cell unit 64 is the oxyhydrogen reaction for power generation executable. As an alternative to the separate formation of the units 62 and 64 can the regenerative fuel cell device 10 but also have a compact electrolysis and fuel cell unit.

The regenerative fuel cell device of 1a is designed as a closed system, so that in addition to a hydrogen storage 58a for storing the hydrogen produced during the endothermic electrolysis nor an oxygen storage 58b for storing the simultaneously obtained oxygen in the regenerative fuel cell device 10 is available. In the closed system, the electrolysis unit 62 preferably designed as a constant pressure electrolyzer, so that both the hydrogen produced and the oxygen obtained pressurized to the memory 58a and 58b be delivered.

The in the coordinate system of 1c Graph gH2 is a relation between one in the hydrogen storage 58a present storage pressure pH2 and a sufficient volume VH2 of the hydrogen storage 58a again. Accordingly, there is a relation between one in the oxygen storage 58b present storage pressure pO2 and a sufficient volume VO2 of the oxygen storage 58b by the graphene gO2 in the coordinate systems of 1d shown.

As shown schematically in the graphs gH2 and gO2, with an easily realizable storage pressure pH2 and pO2, a relatively small volume VH2 and VO2 of the storage already exist 58a and 58b sufficient. The accumulator pressure pH2 and pO2 can be stored in both stores, for example 58a and 58b at 700 bar, so for the hydrogen storage 58a a volume VH2 of 15.5 liters and for the oxygen storage 58b a volume VO2 of 7.5 liters is sufficient. As a rule, a re-compaction is not necessary. (If necessary, a hydrogen post-compression unit can be used.) It should be noted that at these volumes, VH2 and VO2 are for the memory 58a and 58b the regenerative fuel cell device 10 with a total volume of about 38 liters can be formed. The total volume of the regenerative fuel cell device 10 can still be below the volume of the battery 52 (typically 50 liters for a lithium-ion battery).

An equipment of the regenerative fuel cell device 10 with the tank 66 for de-ionised water 66 is optional. In addition, the regenerative fuel cell device 10 be designed as an open system, wherein the fuel cell unit 64 Atmospheric oxygen is used to carry out the oxyhydrogen reaction. In this case, that of the electrolysis unit 62 released oxygen into the atmosphere. Optionally, the obtained deionized water in the tank 66 cached or released into the atmosphere. In an embodiment of the regenerative fuel cell device 10 as an open system, their total volume is about 35.5 liters.

2 FIG. 12 is a flowchart for explaining an embodiment of the method for varying a temperature in a vehicle interior of a motor vehicle equipped with a regenerative fuel cell device.

For carrying out the method explained below, for example, at least some of the components described above can be used. It should be understood, however, that the practicability of the method is not limited to employing at least some of these components.

When utilizing the method for varying a temperature in a vehicle interior of a motor vehicle equipped with a regenerative fuel cell device, at least one of the method steps S1 and S2 is carried out:
In a method step S1, a waste heat of the regenerative fuel cell device, which is obtained when an endothermic electrolysis is carried out while consuming a supplied current and / or during an electrolysis reversible exothermic reaction to generate electricity, is at least partially forwarded to a heat transfer device of the motor vehicle. By means of the heat transfer device, the at least partially provided waste heat can therefore be forwarded into a vehicle interior such that the vehicle interior is heated by means of the waste heat of the regenerative fuel cell device which is at least partially passed on by the heat transfer device.

In a method step S2, at least one subunit of a sorption refrigerating machine is heated by means of at least part of the waste heat of the regenerative fuel cell device. As already explained above, the vehicle interior can be cooled by means of the sorption chiller in this way.

The method steps S1 and S2 can be carried out in any order and with as many repetitions as desired. On a new description of the advantages realized with it is omitted here.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• DE 102004027433 A1 [0002]

Claims (11)

Regenerative fuel cell device ( 10 ) for a motor vehicle which is designed to carry out an endothermic electrolysis while consuming a supplied current and to generate electricity by means of an exothermic reaction reversible to the endothermic electrolysis, characterized in that the regenerative fuel cell device ( 10 ) additionally designed in such a way and directly or indirectly so to a heat transfer device ( 14 ) of the motor vehicle and / or to a sorption refrigeration machine ( 16 ) of the motor vehicle is attachable, that a waste heat ( 12 ) of the regenerative fuel cell device ( 10 ) at least partially to the heat transfer device ( 14 ) and / or at least one subunit ( 18 ) of the sorption chiller ( 16 ) by means of at least part of the waste heat ( 12 ) of the regenerative fuel cell device ( 10 ) is heated. Regenerative fuel cell device ( 10 ) according to claim 1, wherein the sorption chiller ( 16 ) an absorption chiller ( 16 ) and an exporter ( 18 ) as a subunit ( 18 ) of the sorption chiller ( 16 ) by means of at least the part of the waste heat ( 12 ) of the regenerative fuel cell device ( 10 ) is heated. Regenerative fuel cell device ( 10 ) according to claim 1 or 2, wherein the sorption chiller ( 16 ) comprises an adsorption chiller. Regenerative fuel cell device ( 10 ) according to one of the preceding claims, wherein the regenerative fuel cell device ( 10 ) directly or indirectly to an electric drive motor ( 50 ) of the motor vehicle is attachable, that of the regenerative fuel cell device ( 10 ) generated electricity to the electric drive motor ( 15 ) is dispensable. Regenerative fuel cell device ( 10 ) according to one of the preceding claims, wherein the regenerative fuel cell device ( 10 ) is designed to split water into hydrogen and oxygen as an endothermic electrolysis while consuming the supplied stream and to generate electricity by means of the reversible exothermic reaction of hydrogen and oxygen to form water. Vehicle temperature control system for a motor vehicle with a regenerative fuel cell device ( 10 ) according to one of the preceding claims, the heat transfer device ( 14 ) and / or the sorption chiller ( 16 ). Energy supply system for an electric drive motor ( 50 ) of a motor vehicle with a regenerative fuel cell device ( 10 ) according to any one of claims 4 and 5; and a battery ( 52 ), by means of which the electric drive motor ( 10 ) is energized; wherein the regenerative fuel cell device ( 10 ) and the battery ( 52 ) electrically to a common electrical interface ( 54 ) are connected via which a charging current from a vehicle external power source ( 56 ) to the regenerative fuel cell device (US Pat. 10 ) and the battery ( 52 ) that the battery ( 52 ) and at least one of the regenerative fuel cell device ( 10 ) attached memory ( 58a . 58b ) is fillable for an electrolysis product produced in the endothermic electrolysis. Power supply system according to claim 7, wherein the electric drive motor ( 50 ) in a booster operation at the same time by means of the battery ( 52 ) and by means of the regenerative fuel cell device ( 10 ) is supplied with power. Power supply system according to claim 7 or 8, wherein the regenerative fuel cell device ( 10 ) and the battery ( 52 ) to the generator-operated electric drive motor ( 50 ) and / or a generator of the motor vehicle can be connected, and one of the generator-operable electric drive motor ( 50 ) and / or the generator generated generator current to the regenerative fuel cell device ( 10 ) and the battery ( 52 ) that the battery ( 52 ) and the at least one memory ( 58a . 58b ) is refillable. Electric vehicle with a regenerative fuel cell device ( 10 ) according to one of claims 1 to 5, a Fahrzeugtemperiersystem according to claim 6 or with a power supply system according to one of claims 7 to 9. Method for varying a temperature in a vehicle interior of a vehicle having a regenerative fuel cell device ( 10 ) equipped with at least one of the steps: forwarding a waste heat ( 12 ) of the regenerative fuel cell device ( 10 ), which occurs when carrying out an endothermic electrolysis with consumption of a supplied stream and / or during an electrolysis reversible exothermic reaction to generate electricity, at least partially to a heat transfer device ( 14 ) of the motor vehicle (S1); and / or heating at least one subunit ( 18 ) a sorption chiller ( 16 ) of the motor vehicle by means of at least part of the waste heat ( 12 ) of the regenerative fuel cell device ( 10 ) (S2).

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