BRAKE DISC FOR A MOTOR VEHICLE

Abstract

The present development relates to an electronic control (50) for regulating the humidity of a reaction gas or reaction gas mixture to be supplied to a fuel cell (20) by means of a gas humidifier (40), comprising: - a signal input (52) which can be coupled to a humidity sensor (30) which is located downstream of the gas humidifier (40) in the direction of flow of the reaction gas towards the fuel cell (20), - a processor (54) which is designed to determine the actual humidity of the reaction gas based on electrical signals from the humidity sensor (30) and to generate electronic control signals for a control element (60) based on the determined actual humidity, which is fluidically coupled to the gas humidifier (40) or integrated into the gas humidifier (40), - an electronic storage device (56) which is coupled to the processor (54) via a signal connection and is designed to store the actual humidity of the reaction gas as determined by the processor (54), - a signal output (58) which can be coupled to the control element (60) for regulating the humidity of the reaction gas, - wherein the processor (54) is further configured to generate the electronic control signals (109) for the control element (60) on the basis of an actual humidity previously stored in the electronic memory (56).

Description

Technical field

[0001] The present development concerns an electronic control system for regulating the humidity of a reaction gas or reaction gas mixture supplied to a fuel cell. In a further aspect, the present development concerns a method for regulating the humidity of the reaction gas supplied to the fuel cell, as well as a corresponding system. Finally, the present development concerns a computer program for regulating the humidity of a reaction gas supplied to the fuel cell. background

[0002] Fuel cells, such as those used for local power generation in motor vehicles, must or should be operated within predefined parameters. Optimal operation of a fuel cell requires not only operating it within a specific temperature range, but also ensuring that the reaction gas, and in particular the reaction air supplied to the fuel cell, has a specific humidity level.

[0003] In existing fuel cell systems, it is common to include an air humidifier or gas humidifier, which allows moisture contained in the fuel cell's exhaust gas stream to be transferred to the reaction air supplied to the fuel cell, and thus to the reaction gas supplied to the fuel cell. For targeted regulation of the humidity of the reaction gas supplied to the fuel cell, it is possible, for example, to install a first humidity sensor downstream of a gas humidifier and a second humidity sensor upstream of the gas humidifier.

[0004] The second humidity sensor can be used to characterize the humidity of the air supplied to the fuel cell via an air inlet, i.e., the reaction air. Using two separate humidity sensors is comparatively expensive and requires a corresponding amount of additional equipment.

[0005] Furthermore, a method and a device for purging a fuel cell are known, for example, from CN 113 839 069 B, wherein the purging is based on controlling a pressure at an injector inlet to drive water vapor into a water separator. A humidity sensor is integrated into a return line to detect humidity levels and to automatically adjust the purging level based on a threshold value.

[0006] In contrast, the present development aims to provide an improved electronic control system for regulating the humidity of a reaction gas supplied to a fuel cell, for example, for regulating the humidity of the reaction air supplied to the fuel cell. The equipment required for such a system for regulating the humidity of the reaction gas supplied to the fuel cell is to be reduced, while the reliability and operational safety of such an electronic control system are to be increased. Advantageous designs

[0007] This problem is solved by means of an electronic control system, a system comprising such an electronic control system, a method for regulating the humidity of a reaction gas supplied to the fuel cell, and a computer program for regulating the humidity of the reaction gas supplied to the fuel cell, according to the features of the independent claims. Advantageous embodiments are the subject of dependent claims.

[0008] In its first aspect, the system provides an electronic control unit for regulating the humidity of the reaction gas or reaction gas mixture supplied to a fuel cell, using a gas humidifier. The electronic control unit includes a signal input that can be coupled to a humidity sensor located downstream of the gas humidifier in the direction of reaction gas flow towards the fuel cell. In other words, the humidity sensor is situated between the gas humidifier and the fuel cell when viewed in the direction of reaction gas flow.

[0009] The electronic control system also includes a processor, for example in the form of a controller or microcontroller, which is designed to determine the current humidity of the reaction gas based on electrical signals from the humidity sensor and, based on this determined humidity, to generate electronic control signals for a control element. This control element is fluidically coupled to or integrated into the gas humidifier. The control element serves to control or regulate the gas humidifier. Using the control element, for example, the humidity of the reaction gas supplied to the fuel cell can be changed or controlled, and thus precisely regulated.

[0010] The electronic control system also includes an electronic memory, which is coupled to the processor via signals and is designed to store the actual humidity of the reaction gas as determined by the processor.

[0011] The electronic control system also includes a signal output that can be coupled to the control unit for regulating the humidity of the reaction gas. The control signals generated by the processor can be transmitted to the control unit for regulating the humidity of the reaction gas via this signal output.

[0012] The processor of the electronic control system is further designed to generate the electronic control signals for the control element based on a previously stored actual humidity level in the electronic memory.

[0013] By using previously stored signals in the electronic memory, which represent the current humidity, and / or by using the previously stored current humidity, a highly precise, especially when starting up the fuel cell, current humidity can be used to enable particularly efficient and rapid control of the humidity of the reaction gas supplied to the fuel cell.

[0014] By using the previously stored actual humidity level in the electronic memory, the need for an additional humidity sensor upstream of the gas humidifier can be eliminated in a particularly simple manner. This reduces the complexity of the equipment required for humidity regulation. At the same time, previously stored measurements can be accessed, such as those recorded during or shortly before a fuel cell shutdown.

[0015] When the fuel cell is restarted, these stored values ​​can be accessed, thus shortening the settling-in period or start-up phase of the electronic control loop described here. This prevents, for example, a permanent system error or offset from having to be "relearned," and avoids the need to gradually determine the ambient humidity from a predefined starting value (e.g., 0% humidity) when the system restarts.

[0016] In a further embodiment, the processor is specifically designed to store an averaged actual humidity value over a predetermined time interval in electronic memory. Thus, the processor can be configured to calculate a time-averaged value across the respective actual humidity values ​​determined by the humidity sensor and to store this average value in electronic memory. Instead of individual actual values ​​stored in memory, the processor can then access the averaged actual humidity value stored in memory to generate the electronic control signals for the control element based on the previously stored averaged actual humidity value.

[0017] By designing or programming the electronic control, i.e., the processor, to perform long-term storage of the recorded actual humidity and to use such a value directly at or after the next start or commissioning of the fuel cell to generate specific control signals for the control element, it is ensured that, for example, an integral term of the control or control signals for the gas humidifier do not have to adapt to system-related tolerances in humidity detection and control.

[0018] The proposed use of an averaged actual humidity value previously stored in the system is based on the assumption that the system tolerances of the fuel cell or fuel cell system do not change abruptly after a temporary shutdown of the fuel cell, and that the ambient humidity normally changes so slowly that it is permissible and practical to initially assume a comparable humidity value when the fuel cell is next started or commissioned.

[0019] In this way, the control loop formed by the electronic control in combination with the humidity sensor and the control element, or with the gas humidifier, can start from a previously stored averaged humidity value and does not have to start from an initial humidity value of approximately zero and then make a successive adjustment of the humidity regulation.

[0020] In this way, during system startup or commissioning of the fuel cell, the electronic control can generate or provide a meaningful control signal for the control element of the gas humidifier particularly reliably and quickly, so that the start-up phase or the adjustment of the humidity of the reaction gas, especially during system startup or commissioning of the fuel cell, is comparatively close to a value that will be set later.

[0021] Additionally or alternatively, a deviation of the measured actual humidity from a system-wide predefined target humidity can be stored. Similarly, a deviation between actual and target humidity, integrated and / or averaged over time, can be determined by the processor and stored in electronic memory. In particular, an averaged, permanent deviation of the actual humidity from the predefined target humidity can also be stored.

[0022] Generally, the deflection of a long-term controller, or the so-called integral component of a control signal, is determined by system tolerances and ambient humidity for the given control system. It is advantageous to save a controller or signal deviation measured during system shutdown and use it when the system restarts.

[0023] Following a further refinement of the control system, the processor is designed to read the current humidity and / or the average current humidity stored in the electronic memory for the start-up of the fuel cell and to generate an initial control signal for the control element based on the current humidity read from the electronic memory and / or the average current humidity read from the electronic memory. In this way, the values ​​previously stored in the memory, particularly after a fuel cell shutdown, regarding current or average current humidity, can be used directly upon restart. This eliminates the need for a second humidity sensor upstream of the gas humidifier and simultaneously reduces the time required to reach the required humidity level of the reaction gas for fuel cell operation.

[0024] In a further refinement of the control system, the processor is also configured to generate electronic control signals for the control element based on a comparison of a predetermined target humidity with the actual humidity determined or measurable by the humidity sensor. In this respect, the processor can form a control loop with the humidity sensor, the control element, and the gas humidifier. The processor can be configured to continuously or at regular intervals compare the actual humidity determined by the humidity sensor with a predetermined target humidity of the reaction gas supplied to the fuel cell and, if the actual humidity deviates from the target humidity, generate a corresponding control signal for the control element, i.e., for the gas humidifier, so that the actual humidity approaches the target humidity.

[0025] Furthermore, by designing the processor to store previous values ​​of the actual humidity or an averaged actual humidity, i.e., an integral term of the determined humidity of the reaction gas, in memory and to use that stored value or those stored values ​​for the generation of electronic control signals, the initial control of the humidity of the reaction gas supplied to the fuel cell, such as the humidity of the reaction air supplied to the fuel cell, can be significantly shortened.

[0026] In a further embodiment, the electronic storage device includes a non-volatile electronic memory, so that even in the event of a system shutdown or deactivation of the electronic control, the previously stored measured values ​​regarding actual humidity or average actual humidity are retained.

[0027] In a further aspect, the present development also concerns a system for regulating the humidity of a reaction gas or reaction gas mixture supplied to a fuel cell by means of a gas humidifier. The system includes a previously described electronic control unit. The system also includes a gas humidifier that can be supplied with the reaction gas or reaction gas mixture supplied to the fuel cell. Finally, the system includes a control element that is fluidically coupled to or integrated into the gas humidifier and is designed to regulate the humidity of the reaction gas supplied to the fuel cell by means of the electronic control signals generated by the electronic control unit.Since the system includes a previously described electronic control, all features, effects and benefits previously described with regard to the control also apply equally to the system; and vice versa.

[0028] In a further development of the system, this includes a humidity sensor which is located downstream of the gas humidifier in the direction of flow of the reaction gas towards the fuel cell and is coupled to the electronic control system via data technology to determine the actual humidity of the reaction gas or the reaction gas mixture.

[0029] The system is particularly distinguished by the fact that it comprises only a single humidity sensor, specifically that no additional humidity sensor is located upstream of the gas humidifier. Instead, the system is designed to store the electrical signals detectable or generated by the humidity sensor for determining the current humidity in the electronic control unit's memory, specifically to store a time-averaged current humidity value in the electronic memory.

[0030] In this way, a humidity level averaged or integrated over time can be stored and used when the system restarts or the fuel cell is reactivated, thus eliminating the need for a humidity sensor upstream of the gas humidifier. The manufacturing and implementation costs for such a system, and consequently for a vehicle equipped with such a system, can therefore be significantly reduced.

[0031] Finally, in a further aspect, the present development concerns a method for regulating the humidity of a reaction gas or reaction gas mixture supplied to a fuel cell by means of a gas humidifier, using a previously described electronic control system and / or a previously described system. The method includes, in particular, generating electronic control signals for a control element linked to a gas humidifier via data processing, based on the actual humidity of the reaction gas previously stored in an electronic memory of the electronic control system.

[0032] Advantageously, the generation of electronic control signals for the control element coupled to or integrated into the gas humidifier is based on a previously determined averaged, i.e., time-averaged, actual humidity of the reaction gas.

[0033] Since the method uses a previously described electronic control and / or system, all features, properties and advantages previously described with regard to the electronic control and system also apply equally to the method for regulating the moisture content of the reaction gas supplied to the fuel cell; and vice versa.

[0034] In a further embodiment, the method also includes generating or producing the electronic control signals for the control element based on the actual humidity of the reaction gas, which can be determined by means of a humidity sensor. In particular, the electronic control signals for the control element can be generated or determined using the currently measured actual humidity of the reaction gas, i.e., by evaluating electrical signals from the humidity sensor. At the same time, the actual values ​​previously stored in the system or in the electronic memory from a previous commissioning of the fuel cell can be used, especially for the recommissioning of the fuel cell or the system for regulating the humidity of the reaction gas supplied to the fuel cell.

[0035] Finally, another aspect of this development concerns a computer program for regulating the humidity of a reaction gas or reaction gas mixture supplied to a fuel cell by means of a gas humidifier. The computer program comprises computer-readable instructions which, when executed by a processor of a previously described electronic control unit, cause the processor to generate electronic control signals for a control element linked to the gas humidifier, based on the actual or averaged actual humidity of the reaction gas previously stored in an electronic memory of the electronic control unit.

[0036] Since the computer program can be executed by means of a processor of the previously described electronic control system, all features, advantages and effects previously described with regard to the electronic control system, the system as well as the method for regulating the humidity of a reaction gas or reaction gas mixture to be supplied to the fuel cell also apply equally to the computer program; and vice versa.

[0037] In another aspect, the present development concerns a motor vehicle equipped with a previously described electronic control system or a corresponding system. The motor vehicle can be configured as a passenger car, a commercial vehicle (especially a van), a bus, or a delivery van. Brief description of the characters

[0038] Further features, properties, and advantages of the electronic control, the system, the method, and the computer program for regulating the humidity of a reaction gas supplied to a fuel cell are described below with reference to an exemplary embodiment and the figures. These figures show: Fig. 1 a schematic representation of a motor vehicle equipped with electronic control, Fig. 2 a block diagram of a system for regulating the humidity of a reaction gas supplied to a fuel cell, Fig. 3 a more detailed excerpt of the system, Fig. 4. A visual representation of measurement signals and derived control signals over time is considered and Fig. 5 a flowchart of the procedure for regulating the humidity of a reaction gas to be supplied to the fuel cell. Detailed description

[0039] In Fig. Figure 1 schematically shows a motor vehicle 1 with a vehicle body 2 and an interior 3 functioning as a passenger compartment. The motor vehicle 1 includes a system 10 for regulating the humidity of a reaction gas supplied to a fuel cell 20. The vehicle 1 includes a fuel cell 20, for example for generating electrical energy based on a reaction gas supplied to the fuel cell 20 via a fuel supply 22.

[0040] As especially in Fig. As shown in Figure 2, the fuel cell system comprises, in addition to the fuel cell 20, an air inlet 11, which forms the entrance to a flow path leading to the fuel cell 20 for the reaction air, i.e., for the reaction gas to be supplied to the fuel cell 20. Oxygen, i.e., ambient air, can be supplied to the fuel cell 20 via the air inlet 11. A further reaction gas, such as hydrogen, can be supplied to the fuel cell 20 via the fuel supply 22.

[0041] The fuel cell 20 also has an exhaust gas line 16, which is fluidically coupled to a gas humidifier 40. The flow path leading from the air inlet 11 towards the fuel cell 20 includes an air filter 12, downstream of which is a sensor device 13. A compressor 14 is provided downstream of the sensor device 13 to bring the reaction gas supplied to the fuel cell 20 to a predetermined pressure level. Downstream of the compressor, the inlet-side flow path for the reaction gas is also fluidically coupled to the gas humidifier 40. A humidity sensor 30 is provided downstream of the gas humidifier 40, which is arranged upstream of an inlet for the fuel cell 20.

[0042] The sensor device 13 can, in particular, include a pressure sensor, a temperature sensor and / or an air mass sensor to receive the corresponding measurement signals required for controlling the fuel cell 20. The sensor device 13 can be configured without a humidity sensor.

[0043] The gas humidifier 40 can in particular have a moisture-impermeable or moisture-promoting membrane 62, by means of which the moisture transported by the exhaust gas line or by the line 16 can be transferred to the gases flowing through the inlet-side line 15.

[0044] For humidity control of the reaction gas flowing through line 15 on the inlet side, for example, for the air supplied to the fuel cell 20, a bypass 18 can be provided, through which the gas humidifier 40 can be bypassed on the inlet side and in terms of flow characteristics. The amount of gas flowing through the bypass 18 can be regulated by means of a control element 60, for example, by means of a control valve. In this way, the proportion of the air initially supplied via the air inlet 11 that flows through the gas humidifier 40 can be controlled or regulated by means of the control element 60.

[0045] In terms of control technology, system 10 for regulating the humidity of the reaction gas supplied to the fuel cell 20 has a control unit 50, which is located in Fig. Figure 3 is shown separately. The controller 50 has a signal input 52 and a signal output 58. The controller 50 is coupled to the humidity sensor 30 via the signal input 52. The control signals generated or generable by the controller 50 can be transmitted to the control element 60 via the signal output 58 in order to ultimately regulate the humidity of the reaction gas by means of the gas humidifier 40. The line 15 carrying the reaction gas is in Fig. 3 indicated by arrows.

[0046] The controller 50 naturally comprises an electronic processor 54 and an electronic memory 56, which can be designed as non-volatile memory. The processor 54 is specifically designed to determine the actual humidity of the reaction gas or reaction gas mixture flowing through the humidity sensor 30, based on electrical signals coupled into the controller 50 via the signal input 52, and to store this actual humidity in the electronic memory 56. The processor 54 can also be specifically designed to determine or calculate a deviation between the determined actual humidity and a predetermined target humidity, and to store a time-averaged or integrated deviation in the memory 56.

[0047] The deviation between target and actual humidity can be directly considered as the so-called short-term control component or proportional component (P) of a control signal. It is called proportional because the measured difference is typically multiplied by a factor and directly applied to the control element.

[0048] Ideally, the short-term controller should always operate around the zero position, simply because otherwise meaningful multiplication with gain factors can become difficult. For this reason, the proportional component is integrated, resulting in the so-called integral component (I-component / long-term component) of the control signal.

[0049] Furthermore, the control unit 54 can be configured to read the actual humidity previously stored or saved in memory 56 and / or the averaged actual humidity for generating control signals for the control element 60, and to perform control based on these averaged and previously saved values. Additionally or instead of this, the integral component or long-term component of the control signal can also be determined and stored or saved in memory.

[0050] The operating principle of the electronic control 50 is shown in particular by diagram 100 according to Fig. 4 clearly.

[0051] At the start of commissioning, approximately at time t0, the electronic controller 50 operates almost like a conventional control loop, which includes the humidity sensor 30, the electronic controller 50, and the control element 60. Graph 109 represents the amplitude of the electronic control signal supplied to the control element 60 over time.

[0052] The control signal 109 can be divided into several components. The electronic control signal 109 is, in this case, a superposition of a short-term or proportional component 102 of the control signal, a further signal component 104, which characterizes constant system tolerances of the system 10, and a further long-term signal component 106, which represents the ambient humidity, i.e., the initial humidity of the reaction gas or combustion gas supplied via the air inlet 11.

[0053] The signal component 108 represents the integral of the proportional component 102. At time t0, during the initial commissioning of the electronic control 50, the control 50 is configured to compare a predetermined setpoint for the humidity of the reaction gas with a measured actual value. This comparison necessitates a gradual increase in the amplitude of the electronic control signal 109 up to time t1. This is also reflected in a sharp increase in the proportional or short-term component 102.

[0054] At time t1, the system is, so to speak, settled or steady. The control loop of system 10 then reacts to system changes or tolerances occurring during the operation of the fuel cell 20. As can be seen, for example, at time t2, the ambient humidity may change slightly between t1 and t2, which is reflected by a corresponding temporary decrease in the signal component 106 at time t2 compared to time t1. Accordingly, the amplitude of the final integral component 108 of the electronic control signal 109 for the control element 60 also changes.

[0055] At time t3, the fuel cell 20 is switched off or deactivated. Accordingly, the electronic control unit 50 is also put into standby mode. When the fuel cell 20, and thus the electronic control unit 50, is restarted at time t4, the electronic control unit 50 can now access previously stored averaged parameters or control signals in memory 56, for example at time t3, as well as the stored permanent deviation between target and actual humidity. This allows the control element 60 and the generation of the electronic control signals 109' to be used to assume an amplitude or value similar to that which prevailed at time t3 when the fuel cell was switched off.Unlike the initial commissioning and unlike the interval t0 to t1, during recommissioning at time t4, an electronic control signal 109' can be provided immediately and without noticeable time delay, which reflects the system tolerances and / or environmental conditions prevailing at time t4 relatively well. In particular, the signal component 108 can be stored at time t3 and read out from the storage at a later time when the fuel cell is recommissioned.

[0056] It is therefore proposed to establish long-term storage of the measured system humidity by storing the integral term of the humidity control when system 10 is switched off and applying this value directly after the next start of system 10. This ensures that the integral term, in particular signal components 104 and 106, do not have to adapt to system-related tolerances in humidity measurement and control, and that the humidity value measured during shutdown is also used when the fuel cell is switched on again.

[0057] The system tolerances, which necessitate corresponding adjustments by the control element 60, typically do not change abruptly during a system shutdown or startup. Furthermore, it can be assumed that the ambient humidity, i.e., the humidity at the air inlet 11, normally changes so slowly that it is perfectly acceptable and practical to assume an initial humidity value at the next startup or commissioning of the fuel cell 20 that is approximately the same as the humidity value the system had at the time of shutdown.

[0058] The flowchart according to Fig.Figure 5 again shows individual steps of a procedure for regulating the humidity of a reaction gas supplied to the fuel cell 20. In a first step 200, for example, or optionally, individual humidity values ​​measured by the humidity sensor 30 are stored in the memory 56 of the electronic control unit 50. In step 202, the fuel cell 20, and thus also the electronic control unit 50, can be temporarily switched off. In the subsequent step 204, the fuel cell 20, and thus also the electronic control unit 50, is restarted. During this step and in step 206, the integral or long-term component of the control signal previously stored in the electronic memory 56 is read out. Based on this read-out actual humidity value, previously stored in the memory 56, a control signal is then generated in step 208 to be supplied to the control unit 60.

[0059] The illustrated embodiments merely show possible configurations of the development, for which numerous further variants are conceivable during development. The exemplary embodiments shown are in no way to be interpreted as limiting with regard to the scope, applicability, or configuration possibilities of the development. The present description merely shows the person skilled in the art one or a few possible implementation(s) of an embodiment. Thus, a wide variety of modifications can be made to the function and arrangement of the described elements without departing from the scope of protection defined by the following claims or their equivalents. Reference symbol list 1 motor vehicle 2 Bodywork 3 Interior 10 System 11 Air intake 12 air filters 13 Sensor device 14 Compressor 15 Management 16 Management 18 Bypass 20 Fuel cell 22 Fuel supply 30 humidity sensors 40 gas humidifiers 50 Control 52 Signal input 54 processor 56 storage 58 Signal output 60 Control body 62 Membran QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 113 839 069 B

[0005]

Claims

Electronic control (50) for regulating the humidity of a reaction gas or reaction gas mixture supplied to a fuel cell (20) by means of a gas humidifier (40), comprising: - a signal input (52) which can be coupled to a humidity sensor (30) which is located downstream of the gas humidifier (40) in the direction of flow of the reaction gas towards the fuel cell (20), - a processor (54) which is designed to determine the actual humidity of the reaction gas based on electrical signals from the humidity sensor (30) and to generate electronic control signals for a control element (60) based on the determined actual humidity, which is fluidically coupled to or integrated into the gas humidifier (40), - an electronic memory (56) which is coupled to the processor (54) and designed to store the actual humidity of the reaction gas determined by the processor (54),- a signal output (58) which can be coupled to the control element (60) for regulating the humidity of the reaction gas, - wherein the processor (54) is further configured to generate the electronic control signals (109) for the control element (60) on the basis of an actual humidity previously stored in the electronic memory (56). Control (50) according to claim 1, wherein the processor (54) is configured to store an actual humidity averaged over a predetermined time interval or an integrated control signal in the electronic memory (56) during or as a result of a shutdown of the fuel cell (20). Control (50) according to one of the preceding claims, wherein the processor (54) is configured to read out the actual humidity stored in the electronic memory (54) and / or the averaged actual humidity for commissioning the fuel cell (20) and to generate an initial control signal for the control element (60) on the basis of the actual humidity read out from the electronic memory (54) and / or the averaged actual humidity. Control (50) according to one of the preceding claims, wherein the processor (54) is further configured to generate the electronic control signals (109) for the control element (60) on the basis of a comparison of a predetermined target humidity with the actual humidity that can be determined by means of the humidity sensor (30). Control (50) according to one of the preceding claims, wherein the electronic memory (56) comprises a non-volatile electronic memory. System (10) for regulating the humidity of a reaction gas or reaction gas mixture to be supplied to a fuel cell (20) by means of a gas humidifier (40), comprising: - an electronic control unit (50) according to one of the preceding claims, - a gas humidifier (40) which can be supplied with the reaction gas or reaction gas mixture to be supplied to the fuel cell (20), - a control element (60) which is fluidically coupled to or integrated into the gas humidifier (40) and is designed to regulate the humidity of the reaction gas to be supplied to the fuel cell (20) by means of the electronic control signals (109) generated by the electronic control unit (50). System (10) according to claim 6, further comprising a humidity sensor (30) which is located downstream of the gas humidifier (40) in the direction of flow of the reaction gas towards the fuel cell (20) and is coupled to the electronic control (50) for determining the actual humidity of the reaction gas or reaction gas mixture. Method for regulating the humidity of a reaction gas or reaction gas mixture to be supplied to a fuel cell (20) by means of a gas humidifier (40) using an electronic control (50) according to one of the preceding claims 1 to 5 and / or using a system (10) according to one of claims 6 or 7, comprising: - generating electronic control signals (109) for a control element (60) coupled to a gas humidifier (40) by means of data technology based on the actual humidity of the reaction gas previously stored in an electronic memory (56) of the electronic control (50). Method according to claim 8, further comprising:- Generating the electronic control signals (109) for the control element (60) on the basis of an actual humidity of the reaction gas which can be determined by means of a humidity sensor (30). Computer program for regulating the humidity of a reaction gas or reaction gas mixture supplied to a fuel cell (20) by means of a gas humidifier (40), wherein the computer program comprises computer-readable instructions which, when executed by a processor (54) of an electronic control unit (50) according to one of the preceding claims 1 to 5, cause the processor (54) to: - generate electronic control signals (109) for a control element (60) coupled to the gas humidifier (40) on the basis of the actual humidity of the reaction gas previously stored in an electronic memory (56) of the electronic control unit (50).

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