Method for controlling the supply of fuel to a fuel cell, fuel cell system, vehicle, computer program product, and storage medium

Abstract

The invention relates to a method for controlling the supply of fuel to a fuel cell (11) of a fuel cell system (10), having the steps of: determining the operating state of the fuel cell system (10), providing various possible steps for influencing the fuel supply, selecting at least one of the provided steps on the basis of the determined operating state of the fuel cell system (10), and controlling the supply of fuel to the fuel cell (11) by carrying out the at least one selected step. The invention further relates to a fuel cell system (10), to a vehicle (100), and to a computer program product (70) for carrying out the method as well as to a computer-readable storage medium (80) on which the computer program product (70) is stored.

Description

[0001] Description

[0002] Method for controlling the fuel supply of a fuel cell, fuel cell system, vehicle, computer program product and storage medium

[0003] The technology disclosed herein relates to a method for controlling the fuel supply of a fuel cell of a fuel cell system. The technology further relates to a fuel cell system, a vehicle, and a computer program product for executing the method. The method also relates to a computer-readable storage medium on which such a computer program product is stored.

[0004] Fuel cell systems for mobile applications are known in the prior art. In a vehicle, fuel cell systems are typically configured to generate electrical energy for the vehicle's drive motor. Typical fuel cell systems comprise a fuel cell stack. The fuel cell stack includes several fuel cells, each with two electrodes and a membrane arrangement between the two electrodes. Within the fuel cell stack, fuel reacts with oxygen via reverse electrolysis, thereby generating electricity. The fuel can be supplied to the fuel cell stack from at least one pressure vessel in the vehicle. The oxygen can be drawn from the ambient air.

[0005] Furthermore, it is known that the anode should be optimally supplied with fuel at all times. If the anode is not supplied with fuel, permanent damage to the fuel cell can result. In conventional fuel cells, there are various ways to supply the anode with fuel. For example, there are different methods for circulating anode gas in the anode area. One known method is to route anode exhaust gas via a purge path into a cathode exhaust path. A blower can be used for active circulation of the anode gas, and an ejector can be used for passive circulation. The recirculation effect of the ejector is determined by the fuel flow rate. The fuel flow rate correlates strongly with the power output of the fuel cell. At low power outputs, using the ejector with a constant fuel flow rate is only possible to a limited extent.Purging always results in fuel losses at the anode. These fuel losses must be minimized. The purpose of this technology is to create improved methods and devices for controlling the fuel supply to a fuel cell or fuel cell system.

[0006] The aforementioned problem is solved by the patent claims. In particular, the aforementioned problem is solved by the method according to claim 1 and by the fuel cell system, the vehicle, the computer program product, and the computer-readable storage medium according to the dependent claims. Further advantages of the disclosed technology will become apparent from the subclaims, the description, and the figures. Features described in connection with the method also apply in connection with the fuel cell system, the vehicle, the computer program product, and the storage medium, and vice versa, so that the disclosure always makes and / or can make reciprocal references to the individual aspects.

[0007] According to a first aspect of the present technology, a method for controlling the fuel supply of a fuel cell of a fuel cell system is proposed, wherein the fuel cell system comprises a fuel cell with an anode and a cathode, an anode inlet path, an anode exhaust path, a recirculation path, and an ejector. The method has the following steps:

[0008] - Determining the operating state of the fuel cell system,

[0009] - Providing the steps to: o Change an inert gas concentration in and / or at the anode, o Change a fluid pressure in and / or at the anode, o Change a temperature in and / or at the anode, o Set a pulsed operation of the ejector,

[0010] - Selecting at least one of the provided steps based on the determined operating state of the fuel cell system and

[0011] - Checking the fuel supply to the fuel cell by performing at least one selected step.

[0012] A method for systematically adjusting the operating strategy of the fuel cell system is proposed, according to the provided possible steps, to ensure the fuel supply to the fuel cell, and especially to the anode, effectively and as efficiently as possible. This means that fuel losses should be prevented as far as possible. The method can be used to actively modify the operating strategy of the fuel cell system in order to establish a minimum recirculation rate for a defined and / or definable power point of the fuel cell system. Accordingly, at least one of the provided steps can be selected such that, when controlling the fuel supply, a recirculation mass flow rate through the recirculation path is increased and / or a minimum recirculation mass flow rate through the recirculation path is achieved at virtually every power point of the fuel cell system.The technology described here also takes into account that the various steps have different cross-effects on, for example, the operating efficiency and / or aging behavior of the fuel cell system. This means that the fuel supply to the fuel cell is not simply controlled based on one of the aforementioned steps. Rather, at least one step is specifically selected considering the four possible steps, their interrelationships, their effectiveness, and potentially different boundary conditions. Only then is the fuel supply controlled according to the selected step. In this way, the desired fuel supply can be ensured particularly effectively and efficiently.

[0013] The process is preferably carried out in a fuel cell system that does not have an active recirculation fan and / or in which only or primarily the ejector is responsible for recirculation in the recirculation path. The aforementioned steps allow the recirculation through the recirculation path to be specifically influenced, for example, increased. By increasing the fluid pressure in and / or at the anode and decreasing the temperature in and / or at the anode, the gas density in and / or at the anode can be increased. This can have a positive effect on recirculation. The precise interactions of the individual steps and the subsequent adjustments to operating parameters can be calculated, simulated, and / or experimentally determined beforehand.

[0014] The procedure can be performed online, for example, during customer service, or during the design of the fuel cell system. The procedure is used in particular to monitor the fuel supply to the anode. Furthermore, the procedure is preferably used to monitor the fuel supply of a fuel cell within a PEM fuel cell system. The steps provided can, in principle, be performed in any order and / or with any frequency to monitor the desired fuel supply. The operating state of the fuel cell system can be understood as the current functional parameters and / or operating conditions of the fuel cell system during operation. The operating state can encompass a multitude of parameters and / or factors, each of which can influence the state and performance of the fuel cell system.This includes the operating temperature of the fuel cell, the operating pressure of the process gases such as fuel and air, the membrane humidity of the fuel cell, the current density of the fuel cell, the fuel cell voltage, the operating efficiency, and the degradation state. To determine the operating state, at least one of the aforementioned aspects, or at least one other aspect not mentioned, can be considered and / or determined. Determination can be understood as measuring, calculating, modeling, and / or estimating. Therefore, the operating state can be determined, for example, by means of measurements, estimations, virtual models, and / or calculations.

[0015] Providing the steps means making them available as possible process steps that can be executed by the fuel cell system. For example, the steps can be read as control instructions from a computer-readable storage medium and / or provided via such a storage medium, locally or online. In addition to the selected steps, further steps can be executed to control the fuel supply. Controlling can be understood as steering, regulating, and / or adjusting. Selection can be performed using a selection unit. The selection unit can be part of a control unit and / or a computer.

[0016] Fuel cell fuel supply refers to the provision and management of the fuel required for the electrochemical reaction within the fuel cell. Fuel supply can encompass several aspects and processes aimed at ensuring that the fuel is available in the correct quantity, purity, and under optimal conditions.

[0017] Changing the inert gas concentration generally results in a change in the fuel concentration in the recirculation path and / or in a change in the fuel concentration in and / or at the anode. Therefore, changing the inert gas concentration in and / or at the anode can also be understood as changing the fuel concentration in the recirculation path and / or as changing the fuel concentration in and / or at the anode. The term "inert gas" can refer to nitrogen and / or another inert gas.

[0018] The fluid pressure in and / or at the anode can be changed by appropriately controlling the ejector. The inert gas concentration in and / or at the anode can also be changed by appropriately controlling the ejector. The term ejector can refer to an injector / ejector. The temperature in and / or at the anode can be changed by a temperature control medium, in particular a coolant, in the fuel cell. The temperature control medium can be circulated in a coolant path of the fuel cell system. Changing the temperature in and / or at the anode can refer to actively and / or deliberately altering the fuel cell temperature, which affects the temperature in and / or at the anode.To change the inert gas concentration, fluid pressure, and / or temperature, the fuel cell system may include additional or other functional components, which can be considered parts of a control unit. Pulsing operation can be set using a purge valve in and / or on a purge path of the fuel cell system. The purge valve can be controlled to set the desired pulsing operation. The purge valve can be understood as part of a control unit of the fuel cell system for setting the pulsing operation.

[0019] Pulsed operation refers to a process in which purging is carried out with a defined pulsing frequency and / or cycle rate. Pulsed operation is distinct from operation in which the purge valve is opened only once for purging and then closed again. In other words, while the purge valve is opened and closed once in non-pulsed operation, it is opened and closed multiple times at a defined cycle rate during pulsed operation. However, setting the pulsed operation can also refer to modifying an existing pulsed operation. For example, setting the pulsed operation can change, such as increasing, the cycle rate of the current pulsed operation.

[0020] According to one implementation variant, the process can also feature:

[0021] - Selecting several provided steps based on the determined operating state of the fuel cell system, - Defining a sequence in which the selected steps are to be executed, based on the determined operating state of the fuel cell system and

[0022] - Checking the fuel supply to the fuel cell by performing the selected steps in the defined sequence.

[0023] During the development of the technology described here, it became apparent that the fuel supply can be controlled particularly effectively by a specific sequence of steps. For example, the fuel cell system can be operated with exceptional efficiency, gentleness on components, and / or safety by means of this specifically defined sequence. Fuel losses can be effectively prevented, while operational reliability and / or stability are maximized. The sequence of steps can be defined differently depending on the determined operating state and / or current boundary conditions such as the current fuel consumption. The sequence can be changed incrementally, i.e., step by step and / or gradually, depending on the determined operating state. Furthermore, it is possible to define the sequence based on...The sequence is defined depending on at least one functional property of at least one functional component of the fuel cell system. For example, the sequence can be defined differently for different fuel cell systems with different ejectors, depending on the ejector configuration. The steps can be used multiple times to define the sequence. This means the procedure is not limited to executing only four steps. For example, two of the four steps can be executed alternately until at least one further step is completed by the other two steps and / or until it is subsequently determined that the fuel supply is set as desired.For example, the process can involve first changing the fluid pressure, then changing the inert gas concentration, then changing the fluid pressure again, and finally setting up pulsed operation. Furthermore, it is possible to, for example, decrease the inert gas concentration or increase the fuel concentration in and / or at the anode, then increase the fluid pressure in and / or at the anode, and repeat these steps alternately until the desired fuel supply is achieved.

[0024] The described procedure may also include the following steps:

[0025] - Determining fuel consumption in the fuel cell and

[0026] - Defining the sequence based on the determined fuel consumption. Based on fuel consumption, a sequence can be defined that reliably leads to the desired advantageous control of the fuel supply, effectively preventing fuel losses.

[0027] Furthermore, a procedure like the one described here can exhibit:

[0028] - Selection of the provided steps,

[0029] - Define the following sequence based on the determined operating state of the fuel cell system: o Changing an inert gas concentration in and / or at the anode, then o Changing a fluid pressure in and / or at the anode, then o Changing a temperature in and / or at the anode, then o Setting a pulsed operation of the ejector, and

[0030] - Checking the fuel supply to the fuel cell based on the defined sequence.

[0031] Tests have shown that the fuel supply to the fuel cell can be ensured particularly effectively and efficiently by following the steps in the specified order. The process involves first adjusting the inert gas concentration and / or the fuel concentration. If the fuel concentration in the recirculation path cannot be increased further, even though this would be desirable, the fluid pressure in and / or at the anode can be changed, in particular increased. If this is not possible or cannot be carried out in the desired manner, the temperature in and / or at the anode can be changed, in particular reduced. Only if the temperature change does not achieve the desired effect should the pulsing operation of the ejector be set to a defined clock rate.Fuel supply monitoring can be performed in such a way that the defined sequence is specified, but not all four steps need to be carried out. For example, if it is determined after the first or second step that the fuel supply is satisfactory, the last two or three steps do not need to be performed. Furthermore, it is possible to perform the four steps and / or a portion of the four steps for monitoring the fuel supply several times in succession.

[0032] In the described process, the inert gas concentration in and / or at the anode can be altered by reducing it. A lower inert gas concentration can positively affect the amount of recirculated fuel. Tests have shown that this approach can be advantageous for the desired control of the fuel supply, although a lower inert gas concentration can also lead to increased fuel loss through purging.

[0033] Furthermore, the process according to the technology described here allows for the fluid pressure in and / or at the anode to be changed in such a way as to increase the fluid pressure. An increased fluid pressure in and / or at the anode can also have a positive effect on the amount of recirculated fuel and thus on the desired fuel supply. Tests have shown that for different primary mass flows through the injector of an injector / ejector and / or corresponding fuel cell power outputs, there is an optimal fluid pressure in and / or at the anode to generate maximum recirculation. It has also been found that the optimal fluid pressure is higher the higher the primary mass flow rate. However, it has also been shown that reducing the fluid pressure, for example at a low primary mass flow rate and / or low fuel cell power output, can also be advantageous.In this context, the fluid pressure in and / or at the anode can be understood as an anode pressure.

[0034] Furthermore, it is possible that the temperature change in and / or at the anode in the method described here is carried out in such a way as to reduce the temperature. Reducing the temperature can also have a positive effect on the amount of recirculated fuel and thus on the desired fuel supply.

[0035] Furthermore, the method allows for the pulsing operation to be configured by increasing the pulse rate. The primary mass flow rate at the ejector has a disproportionately large impact on the recirculation in the recirculation path. For example, if the primary mass flow rate through the ejector is doubled, the secondary mass flow rate through the recirculation path more than doubles. The fuel cell consumes a specific amount of fuel, which can be metered via the ejector on average. With pulsing and / or an increased pulsing rate of the metering, the average fuel mass flow rate in the recirculation path remains the same; however, the configured pulsing or the corresponding pulsing operation creates shorter periods with an increased fuel mass flow rate followed by periods with a lower fuel mass flow rate.Within the framework of the technology described here, it was recognized that while pulsing can cause negative effects such as acoustic problems, adjusting the pulsing operation is nevertheless suitable as an auxiliary measure to achieve the desired fuel supply. Another aspect of the technology described here concerns a fuel cell system with a fuel cell and a control unit. The fuel cell has an anode and a cathode. The control unit is configured to execute a procedure as described above. Thus, the fuel cell system offers the same advantages as described in detail with reference to the procedure. The fuel cell can have an anode input, an anode output, a cathode input, and a cathode output. The fuel cell system can be configured as a PEM fuel cell system.The fuel cell system can include an injector / ejector. The fuel cell system can include a fuel path, an anode inlet path, an anode exhaust path, a recirculation path, and a purge path. The purge path can include a purge valve for controlling a purge process. The fuel path can be configured to direct a fuel, particularly hydrogen, to a fuel inlet of the injector / ejector. The anode inlet path can be configured to direct anode gas, particularly a mixture of fuel and recirculated anode exhaust, to the anode inlet. The anode exhaust path can be configured to direct anode exhaust into the recirculation path and / or the purge path. The purge path can be configured to direct anode exhaust from the anode exhaust path into a cathode exhaust path.The control unit may include a control unit, an ECU, a computer, sensors, and / or actuators configured to perform the procedure. Fuel in this context can refer to hydrogen and / or a hydrogen-containing fluid.

[0036] The fuel cell system is preferably configured for mobile applications such as vehicles. The fuel cell system can be configured to provide electrical energy to at least one of the vehicle's drive units. The drive unit can be a machine, for example, an electric motor, used to propel the vehicle. The term "fuel cell" can refer to a single fuel cell or, in particular, a fuel cell stack with multiple fuel cells. In its simplest form, the fuel cell is an electrochemical energy converter that converts fuel and oxidant into reaction products, generating electricity and heat in the process. The anode and cathode of a single fuel cell can be separated by an ion-selective or ion-permeable separator.If the fuel cell is configured as a fuel cell stack, the anode can refer to the anode region of the fuel cell stack, and the cathode to the cathode region of the fuel cell stack. Another aspect of the proposed technology concerns a vehicle with a fuel cell system as described above, wherein the fuel cell system is configured to generate electricity in the vehicle. The vehicle can have at least one electric motor for propelling the vehicle, and the fuel cell system can be configured to supply power to this at least one electric motor. Thus, the vehicle offers the same advantages as described in detail with regard to the fuel cell system. The term "vehicle" can refer to a motor vehicle such as a motorized two-wheeler, a passenger car, or a truck.The term "vehicle" can also refer to a road vehicle, an aircraft, a watercraft, a rail vehicle, a spacecraft, and a robot. Furthermore, the term "vehicle" can include a purely electric vehicle and a hybrid electric vehicle, which, in addition to at least one electric motor, has an internal combustion engine for propulsion. The term "vehicle" can also include a fuel cell vehicle and / or a so-called FCEV (Fuel Cell Electric Vehicle).

[0037] Furthermore, the technology disclosed herein comprises a computer program product and a computer-readable, in particular non-volatile, storage medium on which the computer program product is stored. Thus, the computer program product and the computer-readable storage medium also offer the advantages described above. The computer program product can include instructions which, when executed by a computer, for example, a computer of a vehicle control unit, cause the computer to execute the proposed method in a vehicle as described above.

[0038] The computer program product can be implemented as machine-readable instruction code in any suitable programming language and / or machine language, such as Java, C++, C#, and / or Python. The computer program product can be stored on a machine-readable storage medium such as a data disk, removable drive, volatile or non-volatile memory, or onboard memory / processor. The instruction code can program a computer and other programmable devices, such as a control unit, to perform the desired functions. Furthermore, the computer program product can be made available on a network, such as the internet, from which it can be downloaded by a user as needed.The computer program product can be implemented using software, one or more special electronic circuits (i.e., in hardware), or in any hybrid form (i.e., using software components and hardware components).

[0039] Further features and combinations of features of the proposed technology will become apparent from the following description of various embodiments, which are schematically illustrated in the figures. All features and / or advantages arising from the claims, the description, and the figures, including design details and spatial arrangements, can be significant both individually and in combination with one another.

[0040] They each show schematically:

[0041] Fig. 1 shows a fuel cell system according to an embodiment of the present technology,

[0042] Fig. 2 is a flowchart to explain a process according to an embodiment of the present technology,

[0043] Fig. 3 shows a vehicle with a fuel cell system according to an embodiment of the present technology and

[0044] Fig. 4 shows a computer-readable storage medium with a computer program product stored thereon according to an embodiment of the present technology.

[0045] Elements with the same function and mode of operation are each provided with the same reference symbols in the figures.

[0046] Fig. 1 shows a fuel cell system 10 according to a possible embodiment in the form of a PEM fuel cell system. The fuel cell system 10 shown comprises a fuel cell 11 with an anode 12 and a cathode 13. The fuel cell 11 has an anode inlet 21, an anode outlet 22, a cathode inlet 23, and a cathode outlet 24. The fuel cell system 10 further comprises a fuel path 14, an anode inlet path 15, an anode exhaust path 16, a recirculation path 17, a cathode inlet path 26, a cathode exhaust path 27, an ejector 18 in the form of an injector / ejector, and a purge valve 25. Fuel as primary fluid can be fed via the fuel path 14 from a pressure vessel 70 of a vehicle 100, shown in Fig. 3, to the ejector 18. Anode gas can be fed into the fuel cell 11 via the anode inlet path 15 as a mixed gas from the ejector 18.Anode exhaust gas from the fuel cell 11 can be routed via the anode exhaust path 16. Anode exhaust gas from the fuel cell 11 can be routed or drawn into the ejector 18 as secondary fluid via the recirculation path 17 and subsequently returned to the fuel cell 11 via the anode inlet path 15. Anode exhaust gas from the fuel cell 11 can be routed into the cathode exhaust path 27 via the purge path 19. The fuel cell system 10 also includes a control unit 20. The control unit 20 comprises (not shown) control devices, sensors, and actuators configured to perform a procedure for controlling the fuel supply.The control unit 20 can determine the operating status of the fuel cell system 10 based on determined operating parameters such as fuel cell currents, temperatures in and / or at the fuel cell 11, fluid pressures in and / or at the fuel cell, and / or substance concentrations in the respective paths. Furthermore, the control unit 20 can be configured to define a sequence of selected process steps and to control the fuel supply to the fuel cell 11 based on the defined sequence. For this purpose, the control unit 20 can control the purge valve 25, the ejector 18, and / or other functional components of the fuel cell system 10 (not shown).

[0047] With reference to Fig. 2, a method for controlling the fuel supply of the fuel cell 11 shown in Fig. 1 is described. In a first step, the operating state of the fuel cell system 10 is determined. For this purpose, the fuel consumption in the fuel cell 11 is determined. In a second step S2, the steps

[0048] - S2a: Reducing the concentration of inert gas at anode 12,

[0049] - S2b: Increasing fluid pressure at anode 12,

[0050] - S2c: Reducing a temperature in the fuel cell 11 and

[0051] - S2d: Setting a pulsed operation of the ejector 17 is provided. The steps are read from a computer-readable storage medium as possible control instructions. Subsequently, the provided steps S2a, S2b, S2c, S2d are selected in step S3. Furthermore, in step S3, a sequence for steps S2a, S2b, S2c, S2d is defined according to which the steps S2a, S2b, S2c, S2d can be executed. In step S4, the fuel supply of the fuel cell 11 is checked based on the defined sequence. In the example shown in Fig. 2, the first two steps S2a, S2b of the defined sequence in step S3 are executed several times in succession to check the fuel supply. The last two steps S2c, S2d are not executed.

[0052] Figure 3 shows a vehicle 100 in the form of a passenger car. The vehicle 100 has a fuel cell system 10 as described above, comprising a fuel cell 11 and a pressure vessel 70 for fuel. The vehicle 100 also has two electric motors 60 for propelling the vehicle 100. The fuel cell system 10 is configured to generate electrical current in the vehicle 100, which can be used to power the electric motors 60. Furthermore, the vehicle 100 has a control unit 20 configured to execute the procedure described above.

[0053] Fig. 4 shows a computer-readable and non-volatile storage medium 50 on which a computer program product 40 is stored. The storage medium 50 is in the form of a flash drive. The computer program product 40 comprises instructions which, when executed by a computer, cause the computer to perform the described procedure in the fuel cell system 10 shown. The term "computer" can be understood to refer to a part of the control unit 20 of the vehicle 100.

[0054] The technology disclosed here allows for further design principles in addition to those illustrated. That is to say, the technology should not be considered limited to the embodiments explained with reference to the figures.

[0055] Reference symbol list

[0056] Fuel cell anode

[0057] Cathode Fuel path Anode inlet path Anode exhaust path Recirculation path Ejector

[0058] Purge path, control unit, anode input, anode output, cathode input, cathode output, purge valve, cathode inlet path, cathode exhaust path, computer program product, storage medium, electric motor, pressure vessel

[0059] vehicle

Claims

Patent claims 1. Method for controlling the fuel supply of a fuel cell (11) of a fuel cell system (10), wherein the fuel cell system (10) comprises a fuel cell (11) with an anode (12) and a cathode (13), an anode inlet path (14), an anode exhaust path (15), a recirculation path (16) and an ejector (17), comprising: - Determining an operating state of the fuel cell system (10), - Providing the steps of: o Changing an inert gas concentration in and / or at the anode (12), o Changing a fluid pressure in and / or at the anode (12), o Changing a temperature in and / or at the anode (12), o Setting a pulsed operation of the ejector (17), - Selecting at least one of the provided steps based on the determined operating state of the fuel cell system (10) and - Checking the fuel supply to the fuel cell (11) by performing at least one selected step.

2. Method according to claim 1, comprising: - Selecting several provided steps based on the determined operating state of the fuel cell system (10), - Defining a sequence in which the selected steps are to be carried out, based on the determined operating state of the fuel cell system (10) and - Checking the fuel supply to the fuel cell (11) by performing the selected steps in the defined sequence.

3. Method according to claim 2, comprising: - Determining fuel consumption in the fuel cell (11) and - Defining the sequence based on the determined fuel consumption.

4. A method according to any of the preceding claims, comprising: - Selecting the provided steps, - Defining the following sequence based on the determined operating state of the fuel cell system (10): o Changing an inert gas concentration in and / or at the anode (12) thereafter o Changing a fluid pressure in and / or at the anode (12), then o Changing a temperature in and / or at the anode (12), then o Setting a pulsed operation of the ejector (17), and - Checking the fuel supply to the fuel cell (11) based on the defined sequence.

5. Method according to one of the preceding claims, wherein the changing of the inert gas concentration in and / or at the anode (12) is carried out in such a way as to reduce the inert gas concentration.

6. Method according to one of the preceding claims, wherein the changing of the fluid pressure in and / or at the anode (12) is carried out such that the fluid pressure is increased.

7. Method according to one of the preceding claims, wherein the changing of the temperature in and / or at the anode (12) is carried out in such a way as to reduce the temperature.

8. Method according to one of the preceding claims, wherein the adjustment of the pulse operation is carried out by increasing a pulse rate.

9. Fuel cell system (10) with a control unit (20) configured to perform a method according to any of the preceding claims.

10. Vehicle (100) with a fuel cell system (10) according to claim 9, wherein the fuel cell system (10) is configured to generate electrical current in the vehicle (100).

11. Computer program product (40), comprising instructions which, when the computer program product (40) is executed by a computer, cause it to execute the method according to one of claims 1 to 8 in a fuel cell system (10) according to claim 9 and / or in a vehicle (100) according to claim 10.

12. Computer-readable storage medium (50) with a computer program product (40) stored thereon according to claim 11.

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