Method for flushing an anode subsystem, fuel cell system, vehicle, computer program product, computer-readable medium and data carrier signal

Abstract

The present invention relates to a method for flushing an anode subsystem (30) in a low-load operation of a fuel cell system (100), wherein the anode subsystem (30) has an anode supply path (31) leading to an anode inlet (32) of a fuel cell stack, a recirculation path (34) leading away from an anode outlet (33) of the fuel cell stack (20), a passive fuel recirculation conveyor (37), a controllable fuel metering valve (36) for supplying fresh fuel, and a controllable anode flushing valve (38) for flushing the anode subsystem (30). As one step, the method comprises detecting (320) a flushing request for flushing the anode subsystem (30), wherein, in response thereto, the fuel metering valve (36) and the anode flushing valve (38) are monitored (340) at least temporarily in a coordinated manner such that the fuel metering valve (36) and the anode flushing valve (38) are each operated in a pulsating manner and the anode flushing valve (38) is fluidically open only when the fuel metering valve (36) is fluidically open.

Description

[0001] Method for purging an anode subsystem, fuel cell system, vehicle, computer program product, computer-readable medium and data carrier signal

[0002] The present invention relates to a method for rinsing an anode subsystem of a fuel cell system, a fuel cell system, a vehicle, a computer program product, a computer-readable medium and a data carrier signal.

[0003] In a fuel cell system with passive recirculation, for example using a fuel recirculation pump such as a jet pump, recirculation can be minimal or (almost) nonexistent during low-load operation of the fuel cell system, i.e., at low loads and thus with low amounts of fresh fuel. Furthermore, an anode purge valve can be opened to flush an anode subsystem, for example, to discharge nitrogen from a recirculation circuit. Opening the anode purge valve during low-load operation of the fuel cell system can influence the suction effect of the passive fuel recirculation pump. This allows at least a portion of the introduced fresh fuel, such as fresh hydrogen, to be discharged directly via the recirculation pump and the anode purge valve without having flowed through a fuel cell stack of the fuel cell system.This can affect the efficiency and / or lifespan of the fuel cell system, especially the fuel cell stack.

[0004] It is an object of the present invention to at least partially overcome the disadvantages described above. In particular, it is an object of the present invention to provide a method for purging an anode subsystem in low-load operation of a fuel cell system, or a fuel cell system, or a vehicle with a fuel cell system, in which the efficiency and / or service life of the fuel cell system is particularly high.

[0005] The foregoing problem is solved by a method having the features of claim 1, a fuel cell system having the features of claim 6, a vehicle having the features of claim 8, and a computer program product, a computer-readable medium, or a data carrier signal having the features of claims 9, 10, or 11, respectively. Further features and details of the invention will become apparent from the dependent claims, the description, and the drawings. Features and details described in connection with the method according to the invention naturally also apply in connection with the fuel cell system according to the invention, and / or the vehicle, and / or the computer program product, and / or the computer-readable medium, and / or the data carrier signal, and vice versa, so that the disclosure relating to the individual aspects of the invention always makes, or can make, reciprocal reference.

[0006] According to a first aspect, the present invention discloses a method for purging an anode subsystem during low-load operation of a fuel cell system, wherein the fuel cell system comprises at least one fuel cell stack with an anode compartment in the fuel cell stack and the anode subsystem. The anode subsystem comprises at least one anode supply path leading to an anode inlet of the fuel cell stack for supplying the fuel cell stack with anode gas, at least one recirculation path leading away from an anode outlet of the fuel cell stack, a passive fuel recirculation conveyor, a controllable fuel metering valve for supplying fresh fuel to the anode gas, and a controllable anode purge valve for purging the anode subsystem.Furthermore, in the low-load operation of the fuel cell system, the procedure includes as one step the detection of a purging request to purge the anode subsystem, whereby, in response to this, the fuel metering valve and the anode purging valve are controlled in such a coordinated manner that the fuel metering valve and the anode purging valve are each operated in a pulsating manner and the anode purging valve is only fluidically open when the fuel metering valve is fluidly open.

[0007] The process steps described above and below can be carried out individually, together, simply, multiple times, in parallel and / or sequentially in any order, provided it is technically feasible.

[0008] Flushing the anode subsystem can also be understood as purging the anode subsystem.

[0009] The fuel cell system comprises the anode subsystem, which is primarily formed by fuel-carrying components of the fuel cell system. The main function of the anode subsystem is, in particular, the supply and distribution of fuel, especially hydrogen, to the electrochemically active surfaces of the anode compartment of the fuel cell stack and the removal of anode exhaust gas. The fuel cell system may also include a cathode subsystem. The cathode subsystem is primarily formed by the oxidant-carrying components. The cathode subsystem may include at least one oxidant feeder, at least one cathode supply path leading to a cathode inlet of the fuel cell stack, at least one cathode exhaust path leading away from a cathode outlet of the fuel cell stack, and / or other elements. The main function of the cathode subsystem is, in particular, the supply and distribution of oxidant, e.g., hydrogen.Air or oxygen to the electrochemically active surfaces of a cathode compartment of the fuel cell stack and the removal of unused oxidizing agent.

[0010] The at least one recirculation path can also be referred to as the recirculation circuit of the anode subsystem and can furthermore begin at the anode outlet of the fuel cell stack. The recirculation path can terminate upstream of the fuel cell stack at an opening into the anode supply path, with the opening being provided, in particular, in the passive fuel recirculation pump, e.g., a jet pump. The fuel recirculation pump is, in particular, fluidically arranged downstream of the fuel metering valve. The recirculation path ensures that the fuel not consumed during the electrochemical reaction in the fuel cell stack is at least partially reused. The jet pump is particularly preferably an ejector, whereby a pressure differential can be generated by fresh fuel supplied via the controllable fuel metering valve, thus creating a suction effect.The controllable fuel metering valve can be an injector or designed as an injector. Advantageously, an injector as a controllable fuel metering valve and an ejector as a passive fuel recirculation pump can form a single, manageable assembly. This allows for a particularly simple design of the fuel cell system.

[0011] The anode purge valve can also be referred to as a purge valve. By repeatedly opening and closing the anode purge valve (pulsating operation), anode exhaust gases can be advantageously extracted from the recirculation path and introduced into an exhaust gas path, e.g., an anode purge line. The anode purge valve can be located in, on, or downstream of a water separator of the anode subsystem. Furthermore, the fuel metering valve and the anode purge valve can each be designed as an electromagnetic valve. Thus, according to the invention, the fuel metering valve and the anode purge valve can be particularly advantageously coordinated and controlled in a manner consistent with each other.

[0012] The purge request for the anode subsystem can be detected by a control device of the fuel cell system or a vehicle equipped with a fuel cell system. The purge request can be issued to the control device based on a detected or determined concentration of a component of the anode gas in the recirculation path, for example, based on a measured fuel concentration. The fuel concentration in the recirculation path can be detected, for example, by a physical sensor, such as a fuel concentration sensor, or by a virtual sensor.

[0013] The expression "that the fuel metering valve and the anode purge valve are each operated in a pulsating manner" is intended to express in particular that the fuel metering valve is repeatedly opened and closed and that the anode purge valve is repeatedly opened and closed.

[0014] By controlling the fuel metering valve and the anode purge valve in such a way that, in response to the detected purge request, at least temporarily, preferably at least for one (complete) purge cycle, the fuel metering valve and the anode purge valve are each operated in a pulsating manner and the anode purge valve is only fluidically open when the fuel metering valve is fluidly open, a suction effect of the passive fuel recirculation pump, e.g. an ejector, can be counteracted and particularly strong against a counter-suction effect occurring due to the open anode purge valve.Thus, the proportion of introduced fresh fuel, such as hydrogen, which would otherwise be discharged directly via the recirculation conveyor and the anode purge valve during purging of the anode subsystem without having flowed through the fuel cell stack of the fuel cell system, can be kept particularly low, or preferably avoided altogether. Furthermore, the method according to the invention can also ensure a continuous flow through the fuel cell stack for a particularly long period, thereby minimizing the formation of unwanted water accumulation in the fuel cell stack and / or flooding of the fuel cell stack. Thus, the method according to the invention can also improve the efficiency and / or service life of the fuel cell system during low-load operation.

[0015] Fuel cell systems should be particularly large.

[0016] In a method according to the invention, it can be advantageous that, at least during one pulse wave of the pulsating fuel metering valve, the anode purge valve is opened fluidically with a time delay relative to the opening of the fuel metering valve. This ensures, in particular, that the anode purge valve is opened fluidically only after the fuel metering valve. Thus, the suction effect of the passive fuel recirculation pump, e.g., an ejector, can be particularly advantageously counteracted and be substantial against any counter-suction effect occurring due to the open anode purge valve. Furthermore, in a (single) purge process for purging an anode subsystem, the anode purge valve can be opened fluidly with a time delay relative to the respective opening of the fuel metering valve during multiple or many pulse waves of the pulsating fuel metering valve.Thus, the proportion of introduced fresh fuel, such as hydrogen, which (otherwise) is discharged directly via the recirculation conveyor and the anode purge valve during purging of the anode subsystem without having flowed through the fuel cell stack of the fuel cell system, can be kept particularly low, preferably avoided altogether.

[0017] In particular, a pulse wave of the pulsating fuel metering valve begins with a first fluid-technical opening of the fuel metering valve and ends with the immediately following second fluid-technical opening of the fuel metering valve, wherein, in particular, between the first fluid-technical opening of the fuel metering valve and the second fluid-technical opening of the fuel metering valve, the fuel metering valve was closed once, in particular exactly once, and in particular was at least partially closed.

[0018] Pulsating operation (of the fuel metering valve) can also be understood as a time-limited state during which the fuel metering valve alternately supplies more and less fuel than would be necessary for continuous operation of the fuel cell. This time-limited state can last from shortly before the anode purge valve opens at least partially until shortly after the anode purge valve closes at least partially.

[0019] In a method according to the invention, it can be advantageous that, at least during a pulse wave of the pulsating fuel metering valve, the fuel metering valve is closed fluidically with a time delay relative to the closed anode purge valve. This ensures, in particular, that the anode purge valve is closed fluidically before the fuel metering valve. Thus, the proportion of introduced, fresh fuel, such as hydrogen, which would otherwise be discharged directly via the recirculation conveyor and the anode purge valve during purging of the anode subsystem without having flowed through the fuel cell stack of the fuel cell system, can be kept particularly low, or preferably avoided altogether.Furthermore, in a (single) purging process for purging an anode subsystem, with several or many pulse waves of the pulsating fuel metering valve, the fuel metering valve can be closed fluidically with a time delay in relation to the closed anode purging valve.

[0020] In a method according to the invention, it can further be advantageous that, at least during one pulse wave of the pulsating fuel metering valve, the anode purge valve is opened fluidically with a time delay relative to the opening of the fuel metering valve, and that, at least during this pulse wave of the pulsating fuel metering valve, the fuel metering valve is also closed fluidly with a time delay relative to the closed anode purge valve. This can be used in particular in a (single) purge process for purging an anode subsystem with several or many pulse waves of the pulsating fuel metering valve.Thus, the proportion of introduced, fresh fuel, such as hydrogen, which (otherwise) is carried out directly via the recirculation conveyor and the anode purge valve during purging of the anode subsystem, without flowing through the fuel cell stack of the fuel cell system, can be kept particularly low or avoided altogether.

[0021] In a method according to the invention, it can be advantageous that, at least during one pulse wave of the pulsating fuel metering valve, the anode purge valve and the fuel metering valve are fluidically open for the same duration or for substantially the same duration. Furthermore, in a (single) purging process for purging an anode subsystem, during several or many pulse waves of the pulsating fuel metering valve, the anode purge valve and the fuel metering valve can each be fluidically open for the same duration or for substantially the same duration.Thus, the proportion of introduced fresh fuel, such as hydrogen, which (otherwise) is discharged directly via the recirculation conveyor and the anode purge valve during purging of the anode subsystem without having flowed through the fuel cell stack of the fuel cell system, can be kept particularly low, preferably avoided altogether, and at the same time the purging of the anode subsystem can be kept particularly short.

[0022] In particular, during normal operation at low load, the fuel cell system can be operated with at least one first fluid parameter value, e.g., a supply pressure, for feeding fresh fuel (via the controllable fuel metering valve) into the anode gas. During purging, the system can be operated with at least one second fluid parameter value, different from the first, for feeding fresh fuel (via the controllable fuel metering valve) into the anode gas. For example, during purging, the fresh fuel can be fed into the fuel metering valve at a higher supply pressure than during normal low-load operation.Thus, the suction effect of the passive fuel recirculation pump, e.g. an ejector, can be particularly advantageously directed against a counter-suction effect occurring due to the open anode purge valve and be particularly large.

[0023] In a method according to the invention, it can be advantageous for the anode purge valve to be a switching valve, wherein the switching valve is an on / off valve. This allows the fuel cell system to be designed in a particularly simple and / or cost-effective manner.

[0024] According to a second aspect, the present invention discloses a fuel cell system, wherein the fuel cell system comprises at least one fuel cell stack and an anode subsystem. Furthermore, the anode subsystem comprises an anode supply path leading to an anode inlet of the fuel cell stack for supplying the fuel cell stack with an anode gas, an anode compartment in the fuel cell stack, at least one recirculation path leading away from an anode outlet of the fuel cell stack, a passive fuel recirculation conveyor, a controllable fuel metering valve for supplying fresh fuel to the anode gas, and a controllable anode purge valve for purging the anode subsystem.Furthermore, the fuel cell system comprises a control device, wherein the control device is configured at least to detect a purging request for the anode subsystem and, in response thereto, to control the fuel metering valve and the anode purge valve in such a way that the fuel metering valve and the anode purge valve are each operated in a pulsating manner, and furthermore, the anode purge valve is fluidically open only when the fuel metering valve is fluidly open. In particular, the fuel cell system is designed and configured to carry out a method according to the invention.

[0025] The control device is furthermore configured, in particular, to control the fuel cell system in such a way that, at least during a pulse wave of the pulsating fuel metering valve, the anode purge valve is opened fluidically with a time delay relative to the opening of the fuel metering valve, and / or that, at least during a pulse wave of the pulsating fuel metering valve, the fuel metering valve is closed fluidly with a time delay relative to the closed anode purge valve, and / or that, at least during a pulse wave of the pulsating fuel metering valve, the anode purge valve and the fuel metering valve are open fluidly for the same duration or for substantially the same duration.

[0026] The control device can be at least one control unit. Furthermore, the control device can be understood or configured as a (single) control unit of the fuel cell system and / or a vehicle, or as a plurality or multitude of control units of the fuel cell system and / or the vehicle interconnected by communication technology.

[0027] The fuel cell system according to the second aspect of the invention thus has the same advantages as those already described for the method according to the first aspect of the invention.

[0028] According to a third aspect, the present invention shows a vehicle wherein the vehicle has a fuel cell system designed according to the invention.

[0029] The vehicle can be a motor vehicle, in particular a passenger car, a truck, or a motorcycle. The fuel cell system can generate electrical energy to power the vehicle for propulsion. The vehicle according to the third aspect of the invention thus has the same advantages as those already described for the method according to the first aspect of the invention and the fuel cell system according to the second aspect of the invention.

[0030] According to further aspects, the present invention discloses a computer program product, a computer-readable medium and a data carrier signal, wherein the computer program product, the computer-readable medium and the data carrier signal have the same advantages as have already been described for the method according to the first aspect of the invention, the fuel cell system according to the second aspect of the invention, the vehicle according to the third aspect of the invention, the computer program product, the computer-readable medium and the data carrier signal according to the further aspects of the invention.

[0031] The computer program product comprises commands, in particular instructions, wherein the commands, in particular instructions, cause a fuel cell system or a vehicle according to the invention to execute a method according to the invention. The computer program product can be implemented as computer-readable instruction code in any suitable programming language, such as Java, C++, etc., wherein, in particular, the instruction code of the computer program product can program a computer or other programmable devices, such as a control device of a fuel cell system or a vehicle according to the invention, such that the desired functions are executed.

[0032] The computer program product can be realized either by means of instruction code, i.e., software (computer program), or by means of one or more special electronic circuits, i.e., in hardware, or in any hybrid form, i.e., by means of software components and hardware components.

[0033] The computer program product can be stored on a computer-readable storage medium, e.g., volatile or non-volatile memory and / or a processor of the control device.

[0034] Furthermore, the computer program product can be provided in a network such as the Internet, from which it can be downloaded by a user when needed, wherein, in particular, the data carrier signal transmits the computer program product according to the invention when downloading the computer program product.

[0035] Further improvements to the invention will become apparent from the following description of some exemplary embodiments of the invention, which are schematically illustrated in the figures. All features and / or advantages arising from the claims, the description, or the drawings, including design details, spatial arrangements, and process steps, can be essential to the invention, both individually and in various combinations. It should be noted that the figures are for descriptive purposes only and are not intended to limit the invention in any way.

[0036] They show schematically:

[0037] Fig. 1 a method,

[0038] Fig. 2 shows a fuel cell system, and Fig. 3 shows a vehicle.

[0039] In the following figures, identical reference numerals are used for the same technical features even for different embodiments.

[0040] Fig. 1 schematically reveals a method for purging an anode subsystem (30) in low-load operation of a fuel cell system (100), as shown, for example, in Fig. 2. The fuel cell system (100) comprises at least one fuel cell stack (20) with an anode compartment (A), the anode subsystem (30) and a cathode compartment (K), and a cathode subsystem (10), wherein the anode subsystem (30) includes an anode supply path (31) leading to an anode inlet (32) of the fuel cell stack (20) for supplying the fuel cell stack (20) with an anode gas, at least one recirculation path (34) leading away from an anode outlet (33) of the fuel cell stack (20), a passive fuel recirculation conveyor (37), a controllable fuel metering valve (36) for supplying fresh fuel to the anode gas, and a controllable anode purge valve (38) for purging the anode subsystem (30).The anode purge valve (38) is preferably a switching valve, wherein the switching valve is an on / off valve or can only be controlled in one (single) on position (open position) and only one (single) off position (closed position). The method in the low-load operation of the.

[0041] The fuel cell system (100) includes as one step a detection (320) of a purging request to purge the anode subsystem (30), wherein, in response to this, at least temporarily the fuel metering valve (36) and the anode purging valve (38) are controlled in such a coordinated manner (340) that the fuel metering valve (36) and the anode purging valve (38) are each operated in a pulsating manner and the anode purging valve (38) (in the low-load operation of the fuel cell system (100)) is fluidically open only when the fuel metering valve (36) is fluidly open.

[0042] The cathode subsystem (10) is formed in particular from the oxidant-carrying components. The cathode subsystem (10) can include a cathode supply path (11) leading to a cathode inlet of the fuel cell stack (20), as well as a cathode exhaust path (15) leading away from a cathode outlet of the fuel cell stack (20), and / or other elements. By repeatedly opening and closing the anode purge valve (38) (=pulsating operation), anode exhaust gases can be advantageously extracted from the recirculation path (34) and introduced into the cathode exhaust path (15) via an anode purge line (39).

[0043] In the method shown in Fig. 1, it can be advantageous that, at least during a pulse wave of the pulsating fuel metering valve (36), the anode purge valve (38) is opened fluidically with a time delay in relation to the opening of the fuel metering valve (36) (341).

[0044] In the method shown in Fig. 1, it can also be advantageous that, at least during a pulse wave of the pulsating fuel metering valve (36), the fuel metering valve (36) is closed fluidically with a time delay in relation to the closed anode purge valve (38) (342).

[0045] In the method shown in Fig. 1, it can also be advantageous that, at least during a pulse wave of the pulsating fuel metering valve (36), the anode purge valve (38) and the fuel metering valve (36) are fluidically open for the same duration or for substantially the same duration (343).

[0046] Fig. 2 schematically reveals a fuel cell system (100) as already described with reference to Fig. 1, wherein the fuel cell system (100) is particularly configured to carry out a method according to the invention, as described, for example, with reference to Fig. 1. Furthermore, the fuel cell system (100) comprises a control device (50), wherein the control device (50) is configured at least to detect a purging request for purging the anode subsystem (30) and, in response thereto, to control the fuel metering valve (36) and the anode purging valve (38) at least temporarily in such a way that the fuel metering valve (36) and the anode purging valve (38) are each operated in a pulsating manner and, furthermore, the anode purging valve (38) is fluidically open only when the fuel metering valve (36) is fluidly open. The purging request can be based on a detected orThe determined concentration of a component of the anode gas in the recirculation path (34), e.g., based on a measured fuel concentration, is output to the control device (50). Measuring the fuel concentration in the recirculation path (34) or a related quantity can be done, e.g., using a physical sensor, such as a fuel concentration sensor like a hydrogen concentration sensor (60), or a virtual sensor based on several physical quantities (not shown) measured by sensors in the anode subsystem (30).

[0047] Fig. 3 schematically reveals a vehicle (200), wherein the vehicle has a fuel cell system (100) according to the invention, as described, for example, in relation to Fig. 1 and / or Fig. 2.

[0048] Reference symbol list

[0049] 11 Cathode supply pathway

[0050] 15 Cathode exhaust path

[0051] 20 fuel cell stacks

[0052] 30 anode subsystem

[0053] 31 Anode supply path

[0054] 32 Anode inlet

[0055] 33 Anode outlet

[0056] 34 Recirculation pathway

[0057] 36 Fuel metering valve

[0058] 37 Fuel recirculation conveyors

[0059] 38 Anode purge valve

[0060] 39 Anode flushing line

[0061] 50 Control device

[0062] 60 hydrogen concentration sensor

[0063] 100 fuels 11 in a system

[0064] 200 vehicles

[0065] 320 Detecting a flushing request to flush the anode subsystem

[0066] 340 coordinated control of the fuel metering valve and the anode purge valve

[0067] A Anode space

[0068] K cathode space

Claims

Claims 1. Method for purging an anode subsystem (30) in low-load operation of a fuel cell system (100), wherein the fuel cell system (100) comprises at least one fuel cell stack (20) with an anode compartment (A) and the anode subsystem (30), wherein the anode subsystem (30) comprises: - an anode supply path (31) leading to an anode inlet (32) of the fuel cell stack (20) for supplying the fuel cell stack (20) with an anode gas, - at least one recirculation path (34) leading away from an anode outlet (33) of the fuel cell stack (20), - a passive fuel recirculation conveyor (37), - a controllable fuel metering valve (36) for supplying fresh fuel to the anode gas, - a controllable anode purge valve (38) for purging the anode subsystem (30), the method comprising in the low-load operation of the fuel cell system (100): - Recognition (320) of a flushing request to flush the anode subsystem (30), wherein, in response, at least temporarily, the fuel metering valve (36) and the anode flushing valve (38) are controlled in such a coordinated manner (340) that the fuel metering valve (36) and the anode flushing valve (38) are each operated in a pulsating manner and the anode flushing valve (38) is only fluidically open when the fuel metering valve (36) is fluidically open.

2. Method according to claim 1, characterized in that at least during a pulse wave of the pulsating fuel metering valve (36) the anode purge valve (38) is opened fluidically with a time delay in relation to the opening of the fuel metering valve (36) (341).

3. Method according to one of the preceding claims, characterized in that that at least during a pulse wave of the pulsating fuel metering valve (36) the fuel metering valve (36) is closed fluidically with a time delay in relation to the closed anode purge valve (38) (342).

4. Method according to one of the preceding claims, characterized in that at least during a pulse wave of the pulsating fuel metering valve (36) the anode purge valve (38) and the fuel metering valve (36) are fluidically open for the same length of time or for substantially the same length of time (343).

5. Method according to one of the preceding claims, characterized in that the anode purge valve (38) is a switching valve, wherein the switching valve is an on / off valve.

6. Fuel cell system (100), wherein the fuel cell system (100) comprises at least one fuel cell stack (20) with an anode compartment (A) in the fuel cell stack (20) and an anode subsystem (30), and wherein the anode subsystem (30) comprises: - an anode supply path (31) leading to an anode inlet (32) of the fuel cell stack (20) for supplying the fuel cell stack (20) with an anode gas, - at least one recirculation path (33) leading away from an anode outlet (33) of the fuel cell stack (20), - a passive fuel recirculation conveyor (37), - a controllable fuel metering valve (36) for supplying fresh fuel to the anode gas, - a controllable anode purge valve (38) for purging the anode subsystem (30), and wherein the fuel cell system (100) comprises a control device (50), wherein the control device (50) is configured at least to detect a purge request to purge the anode subsystem (30) and, in response thereto, to control the fuel metering valve (36) and the anode purge valve (38) at least temporarily in such a coordinated manner that the fuel metering valve (36) and the anode purge valve (38) are each operated in a pulsating manner and, furthermore, the anode purge valve (38) is fluidically open only when the fuel metering valve (36) is fluidly open.

7. Fuel cell system (100) according to claim 6, characterized in that the fuel cell system (100) is configured to carry out a method according to one of the preceding claims.

8. Vehicle (200), wherein the vehicle (200) comprises a fuel cell system (100) configured according to claim 6 or 7.

9. Computer program product, wherein the computer program product comprises instructions, the instructions causing a fuel cell system (100) according to claim 6 to 7 or a vehicle (200) according to claim 8 to execute a method according to claim 1 to 5.

10. Computer-readable medium, wherein the computer-readable medium contains the The computer program product according to claim 9 is stored.

11. Data carrier signal, wherein the data carrier signal transmits the computer program product according to claim 9.

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