Methods for operating a compressed gas supply system and / or filling a tank, and electronic devices

Abstract

The present invention relates to a method for operating and / or tank filling a compressed gas supply system (34) having at least two compressed gas tanks (15, 16, 17, 18, 19) connected to an anode path (2) of a fuel cell system (1). 【Means for solving the problem】 In order to improve thermal safety during operation and / or tank filling of the compressed gas supply system (34), an injection path having an actively switchable injection valve and a relief path having an actively switchable relief valve are included for each compressed gas tank (15, 16, 17, 18, 19), and valve devices (21, 22, 23, 24, 25) attached to the pressure tanks (15, 16, 17, 18, 19) are individually controlled through a sensor device including at least one sensor for detecting the current temperature in each valve device (21, 22, 23, 24, 25) and a control device connected with respect to the detection.

Description

Technical Field

[0001] The present invention relates to a method for operating and / or tank filling a compressed gas supply system having at least two compressed gas tanks connected to an anode path of a fuel cell system. In addition, the present invention relates to a control device for an electronic device, preferably a vehicle, particularly a fuel cell vehicle.

Background Art

[0002] From Patent Document 1, a method for initial conditioning of a fuel cell of a fuel cell unit for a fuel cell vehicle is known. The fuel cell is controllable by a control device of the fuel cell unit, and the fuel cell is at least partially or fully initially conditioned by the control device. From Patent Document 2, a method for operating a fuel cell system is known. In this method, hydrogen is taken out from a hydrogen reservoir and supplied to the anode of a fuel cell stack via an anode path. The mass flow rate of hydrogen is set by a hydrogen metering valve arranged in the anode path, and the pressure is variably adjusted regardless of the mass flow rate by a controllable pressure reducer arranged in the anode path upstream of the hydrogen metering valve. The pressure is adjusted depending on at least one current condition, particularly ambient temperature, the time point of the most recent tank filling process, the filling level of the hydrogen reservoir, the calibrated pressure after the pressure reducer, the pressure at the anode, the pressure at the cathode, and / or the mass flow rate of hydrogen delivered. From Patent Document 3, a similar method for operating a fuel cell system is known, in which hydrogen taken out from a compressed gas container is thermally conditioned by a heat exchanger arranged in the anode path.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

[0004] The object of the present invention is to simplify or improve the operation and / or tank filling of a compressed gas supply system having at least two compressed gas tanks connected to the anode path of a fuel cell system. [Means for solving the problem]

[0005] The problem is solved by a method for operating and / or filling a compressed gas supply system having at least two compressed gas tanks connected to the anode path of a fuel cell system, wherein each compressed gas tank includes an injection path with an actively switchable injection valve and a relief path with an actively switchable relief valve, and the valve device attached to the pressure tank is individually controlled via a control device connected to detection, which includes at least one sensor that detects the current temperature in each valve device. This method is applicable, for example, to a fuel cell system including a hydrogen-based fuel cell in which hydrogen is converted into electrical energy by oxygen. The electrical energy thus provided is used for propulsion in applications such as electric motors in vehicles. Alternatively, the method relating to the patent application can also be applied to an internal combustion engine system in which hydrogen is used for combustion. The actively switchable valves allow each compressed gas tank to be injected and emptied individually. This offers significant advantages, on the one hand, when filling compressed gas tanks in a compressed gas supply system at a corresponding refueling station, such as a hydrogen station. On the other hand, the compressed gas contained in the compressed gas tanks, particularly hydrogen, can be transported between individual compressed gas tanks as needed, either when the compressed gas supply system is operating or when the vehicle equipped with the compressed gas supply system is stopped. In this way, time can be saved during tank filling. In addition, each compressed gas tank can be injected with a larger amount of compressed gas than in conventional compressed gas supply systems, depending on the circumstances. Furthermore, each compressed gas tank can be operated below the minimum limit pressure when necessary, because each compressed gas tank can be quickly and easily disconnected from and connected to the compressed gas supply system for a certain period of time by closing an actively switchable valve when necessary.In the valve devices attached to each individual compressed gas tank, preferably using a sensor device including multiple sensors, not only is temperature detected, but it is also preferable that operating data of other fluids, such as pressure at the branching point of the valve device and / or mass flow rate through each valve device, is detected by the sensor device in each valve device when the compressed gas tank is being filled or released. The control device is equipped with appropriate software products to process the sensor signals from the sensor device and appropriately control the switching valves, i.e., actively switchable fill valves and actively switchable relief valves, individually.

[0006] A preferred embodiment of this method is characterized in that the control device is equipped with a data set product including reference and / or limit data of the fluid, which is used to control the valve device during the tank filling process and / or when the compressed gas supply system is in operation, depending on the current temperature detected by the valve device, so that the compressed gas tank temperature in the compressed gas tank, also detected, is kept below a first limit temperature. The reference and / or limit data of the fluid includes at least one limit temperature, preferably several different limit temperatures, a temperature characteristic curve, and / or a temperature characteristic map. The compressed gas tank temperature is detected by appropriate sensors in all compressed gas tanks. The advantage of temperature detection in the valve device is that the temperature of hydrogen in each injection and relief path can be detected. In this way, in combination with the compressed gas tank temperature, also detected, extremely efficient temperature control is possible during tank filling and when the compressed gas supply system is in operation.

[0007] Another preferred embodiment of this method is characterized in that the control device is equipped with a data set product containing reference and / or limit data of the fluid, which is used to control the valve device during the tank filling process and / or when the compressed gas supply system is operating, depending on the current temperature detected by the valve device, so that the rise in the individual compressed gas tank temperature in one of the compressed gas tanks is limited through the control of the respective valve device as soon as the compressed gas tank in that tank reaches a second limit temperature. The English concept of derating can also be applied to the limiting of the individual compressed gas tank temperature through the control of the respective valve device. Derating means reduction, pull-down control, or pull-down control in particular. The use of two limit temperatures can further improve temperature control during operation and when the compressed gas supply system is filling tanks.

[0008] Another preferred embodiment of this method is characterized in that, in order to satisfy a predetermined safety requirement, the injection path of a compressed gas tank where the detected compressed gas tank temperature is below a first limit value is opened through the injection valve of the respective valve device. The safety requirement includes, for example, reaching a legally defined safety value during the operation of the compressed gas supply system. Once the predetermined safety value is reached, the injection path of the compressed gas tank is shut off again.

[0009] Another preferred embodiment of this method is characterized in that at least one relief path of each compressed gas tank is opened through a relief valve in the respective valve device to effectively release heat entering each compressed gas tank from the outside. This further improves safety during operation and / or when filling the tanks of the compressed gas supply system. As soon as a sufficient amount of heat has been released, the relief path of each compressed gas tank is shut off again.

[0010] Another preferred embodiment of this method is characterized in that the injection and / or relief paths of the valve device are precisely controlled via a control device to temporally control the compressed gas tank temperature within the compressed gas tank. A correspondingly optimized extraction strategy from individual compressed gas tanks enables a simple method of limiting the temperature within the compressed gas tanks as desired. In this way, predetermined safety requirements can be easily met.

[0011] Another preferred embodiment of this method is characterized in that, when the compressed gas tanks have different internal pressures at the time of tank filling, the compressed gas tanks are filled in a cascaded manner based on the control of an injection valve through a check valve in the injection path of an attached valve device. Preferably, the injection into the compressed gas tank is performed only when the internal pressure of the compressed gas tank is exceeded at the time of tank filling. In this way, the efficiency of tank filling can be effectively improved.

[0012] Another preferred embodiment of this method is characterized in that compressed gas tanks having different storage volumes are filled not simultaneously but staggered in time through their respective injection paths, and the injection path for the larger storage volume compressed gas tank is released via a control device at a time earlier than the filling path for the smaller storage volume compressed gas tank. For example, if there are two compressed gas tanks of different sizes, the larger compressed gas tank is filled first. If there are multiple large compressed gas tanks, it is preferable that they be filled in a cascading manner before the smaller compressed gas tanks are filled. If the compressed gas tank temperature in one compressed gas tank exceeds the critical temperature during the tank filling process, the filling process for that compressed gas tank can simply be stopped, while the other compressed gas tanks simply continue to be filled.

[0013] Another preferred embodiment of this method is characterized in that compressed gas is precisely transferred between each compressed gas tank via an attached valve device to perform internal equilibrium in the compressed gas supply system. In this case as well, control is preferably performed through a control device. The transfer of compressed gas between each compressed gas tank enables intelligent operation strategies and / or tank filling strategies through the control device, for example, by utilizing artificial intelligence. The injection process of the relevant compressed gas tank can be precisely delayed, for example, before reaching the critical temperature.

[0014] The present invention also relates, optionally, to a compressed gas supply system having at least two compressed gas tanks connected to the anode path of a fuel cell system, each compressed gas tank being accompanied by a valve device having an injection path with an actively switchable injection valve and a relief path with an actively switchable relief valve. In this case, the relatively high manufacturing cost due to the paths required by the valve device and the actively switchable valves is intentionally accepted.

[0015] A preferred embodiment of the compressed gas supply system is characterized in that the injection and relief paths of the valve device are fluidically connected in parallel between the internal space of each compressed gas tank and the branching point. This allows for easy individual injection into each compressed gas tank via an injection path having an actively switchable injection valve. Each compressed gas tank can be individually relieved via a relief path having a switchable relief valve. In this way, the compressed gas supply system can operate more efficiently than conventional compressed gas supply systems, not only during tank filling but also under extreme environmental conditions, especially at ambient temperatures.

[0016] Another preferred embodiment of the compressed gas supply system is characterized in that the injection valve in the injection path is located between the branch and a check valve that shuts off in the direction of the injection valve, and in the relief path, a check valve that shuts off in the direction of the relief valve is located between the relief valve and the branch. This prevents malfunctions during operation of the compressed gas supply system.

[0017] Another preferred embodiment of the compressed gas supply system is characterized in that the valve device, along with the injection path, injection valve, relief path, relief valve, and branching section, is integrated into a valve block that is fitted to each compressed gas tank. In addition to the above components, the valve block also includes other components that are partially regulated by law, such as check valves, filters, sensors, and especially preferably pressure limiters. The valve block is preferably fitted to the end of each compressed gas tank. For manufacturing engineering reasons, it is preferable that the valve block is manufactured independently of the compressed gas tank. The valve block is screwed, for example, into the opening of the compressed gas tank. A simple sealing ring, such as an O-ring, can be used to seal between the valve block and the compressed gas tank. The integration of an actively switchable valve into the valve block allows for a simple combination of a conventional compressed gas tank with the valve device of the patent application.

[0018] Another preferred embodiment of the compressed gas supply system is characterized in that the injection valve and relief valve are manufactured as electromagnetically operable 2 / 2-way valves. The 2 / 2-way valves include a closed position and an open position in which each path is released. Preferably, both valves are subjected to initial stress to their respective closed positions in which the fluid passages through each path are blocked. The valves can be opened by electromagnetic control. This improves the safety of the compressed gas supply system during operation.

[0019] Another preferred embodiment of the compressed gas supply system is characterized in that the injection valve and relief valve are connected with respect to a control device connected with respect to detection, and with respect to detection, to a sensor device including at least one sensor that detects fluid operation data such as pressure, temperature, and / or mass flow rate at the branch. This allows for easy and convenient control of temperature, pressure, and / or fill level within each compressed gas tank. Preferably, the control device stores a dataset containing corresponding reference data and / or limit data for pressure, temperature, and / or mass flow rate.

[0020] In the method of operating the compressed gas supply system described above, the aforementioned problems are solved, either alternatively or additionally, by having the injection valve and relief valve individually controlled by the control device, depending on fluid motion data detected by the sensor device. In this way, individual compressed gas tanks can be individually injected as needed, and the contents of each compressed gas tank can be individually released. As a result, advantages are brought about when injecting the compressed gas tanks of the compressed gas supply system. In addition, significant advantages are brought about when operating the compressed gas supply system.

[0021] A preferred embodiment of this method is characterized in that the injection valve and relief valve are individually controlled by a control device to ensure that the compressed gas tanks are filled and / or emptied unevenly. This is particularly preferred when the compressed gas supply system includes compressed gas tanks of different sizes and / or when assembled, each tank is exposed to different environmental conditions, particularly ambient temperature. This is because, for example, some compressed gas tanks are located further outside the vehicle, either inside or on the surface, which can lead to these tanks heating up more rapidly than tanks located further inside the vehicle when exposed to strong sunlight.

[0022] Furthermore, the present invention relates to a control device of an electronic device, preferably of a vehicle, in particular of a fuel cell vehicle, set up to carry out the method described above. By means of the electronic device, the valve devices of the individual compressed gas tanks can be controlled individually. In this way, a comfortable control of the filling level, temperature, and / or pressure in the individual compressed gas tanks of the compressed gas supply system becomes possible.

[0023] The present invention also relates, optionally, to valve devices for the compressed gas supply system described above, in particular valve blocks, injection valves, relief valves, sensor devices, sensors, check valves, and / or compressed gas tanks. The above-mentioned components can be handled separately.

[0024] Other advantages, components, and specific matters of the present invention will become apparent from the following description that specifically describes various embodiments while referring to the drawings.

Brief Description of the Drawings

[0025] [Figure 1] It is a schematic diagram showing a compressed gas supply system having a total of five compressed gas tanks to be filled at a hydrogen station, and each compressed gas tank is equipped with a valve device including an injection path having an actively switchable injection valve and a relief path having an actively switchable relief valve. [Figure 2] It is a diagram showing one of the valve devices of FIG. 1 in the form of a fluid circuit diagram.

Embodiments for Carrying Out the Invention

[0026] In FIG. 1, a hydrogen station 40 is schematically illustrated. By arrow 38, it is suggested that an automobile, which has a fuel cell system 1 and is not shown in detail, is filled with hydrogen at the hydrogen station 40.

[0027] The fuel cell system 1 includes a fuel cell stack (not shown in detail), each having a fuel cell containing an anode that receives hydrogen via an anode path 2. The structure and function of this type of fuel cell system are well known.

[0028] The anode path 2 includes a check valve 3, a filter 4, a pressure sensor 5, a temperature sensor 6, a temperature sensor 8, another pressure sensor 9, another filter 10, a pressure reducer 11, another filter 12, and a check valve 13. A fluid branching section 7 is provided between temperature sensor 6 and temperature sensor 8. At the fluid branching section 7, the manifold piping 14 communicates with the anode path 2.

[0029] Five compressed gas tanks 15, 16, 17, 18, and 19 of the compressed gas supply system 34 are fluidly connected to the manifold piping 14. Compressed gas tanks 15 through 19 are manufactured to partially different sizes. Compressed gas tanks 15 through 17 are approximately the same size, but are larger than both compressed gas tanks 18 and 19, which are similarly manufactured to the same size.

[0030] Compressed gas tanks 15 to 19 are each equipped with valve devices 21 to 25 at the left end of Figure 1. Compressed gas tanks 15 to 19 are each equipped with valve devices 26 to 30 at the right end of Figure 1. Compressed gas tanks 15 to 19 are connected to a manifold piping 20 via valve devices 26 to 30. The manifold piping 20 serves, for example, to manually empty compressed gas tanks 15 to 19. In this case, valve devices 26 to 30 are manufactured as tank discharge valves.

[0031] Valve devices 21 to 25 are all manufactured identically. The valve device 21, located at the left end of the compressed gas tank 15 in Figure 1, will be described in detail below with reference to Figure 2. Valve device 21 is connected to the manifold piping 14 via connecting or linking pipes 31. In this way, the internal space of the compressed gas tank 15, denoted by reference numeral 64 in Figure 2, can be connected to the manifold piping 14 and the anode path 2 via the valve device 21.

[0032] The valve device 21 is integrated into a valve block 50, which is mounted on the upper end of a compressed gas tank 15, which is manufactured as a gas cylinder, as shown in Figure 2.

[0033] In the upper part of Figure 2, a hydrogen station 40 having a tank route 38 indicated by arrows is schematically shown. The hydrogen station 40 is connectable to a control device 43 for control purposes via an infrared interface 41 and a control line 42. The control device 43 is attached to a compressed gas supply system 34 and a fuel cell system 1 in a fuel cell vehicle equipped with the fuel cell system 1 shown in Figure 1.

[0034] The hydrogen station 40 is indicated in the upper part of Figure 2. In the lower part of Figure 2, the upper end of the compressed gas tank 15, which is fabricated as a gas cylinder, is indicated. The internal space 64 of the compressed gas tank 15 is connected to a discharge path 61, an injection path 65, and a relief path 70. These three paths 61, 65, and 70 extend through the valve block 50.

[0035] In the upper part of Figure 2, the connecting pipe 31 is connected to the valve block 50 at connection point 52. The connecting pipe 51 extends from connection point 52 to the fluid branching section 53 of the valve block 50. The connecting pipe 51 is preferably manufactured as a connecting passage within the valve block 50. For convenience, all fluid connections will be referred to as piping below. However, within the valve block 50, it is preferable that all piping be manufactured as bores.

[0036] The connecting pipe 51 is equipped with an optional hydraulic resistor 56 in the form of a throttle. A filter 57 is positioned between the hydraulic resistor 56 and the branching section 53. A discharge path 61 extends from the branching section 53 and communicates with the internal space 64 of the tank. Two valves 62 and 63 are connected in series within the discharge path 61. Valve 62 is a manually operated discharge valve or release valve. The contents of the compressed gas tank 15 can be manually discharged via valve 62 when necessary, for example, when the service life has expired and use is terminated.

[0037] Valve 63 is a heat-activated pressure relief valve. It can relieve pressure in the tank's internal space 64. A manually operated shut-off valve 58 is located between branch 53 and branch 54. The manually operated shut-off valve 58 serves to safely shut off the compressed gas tank 15, for example, during repairs.

[0038] A sensor circuit 59 extends from the branching section 54, and through this, a sensor device 60 detects operational data such as pressure, temperature, and / or fluid mass flow rate at the branching section 54 of the valve block 50 when the compressed gas supply system is in operation. A connecting pipe 51 extending from the branching section 52 communicates with the branching section 55, from which the injection path 65 extends, and the relief path 70 also communicates.

[0039] An injection valve 66 and a check valve 67 are connected in series to the injection path 65. The check valve 67 opens toward the tank internal space 64 and closes toward the injection valve 66. The injection path 65 extends parallel to the relief path 70 from the branching section 55.

[0040] The relief path 70 has a check valve 71, a relief valve 72, a filter 73, and a flow limiter 74 connected in series. The check valve 71 shuts off in the direction of the relief valve 72 and opens in the direction of the branch 55. The flow limiter 74 serves to limit leakage in the event of undesirable pipe damage.

[0041] The injection valve 66 and the relief valve 72 are manufactured as 2 / 2-way valves having an open position and a closed position. Both valves 66 and 72 are electromagnetically operated and connected to the control unit 43 for control purposes. Both valves 66 and 72 are subjected to initial stress towards their respective closed positions, as indicated by the spring symbols. The sensor device 60 is also connected to the control unit 43 for detection or control purposes. In Figure 2, the control line, signal line, or sensor line 76 is indicated by a dashed line.

[0042] The control device 43 is equipped with software that processes the signals from the sensors detected by the sensor device 60 when the compressed gas supply system 34 is operating. The sensors of the sensor device 60 detect, for example, temperature, pressure, mass flow rate, flow direction, and optionally other quantities at the branch 54 of the valve block 50.

[0043] Through the control device 43, compressed gas tanks 15 to 19 are individually controlled to prevent uneven injection and / or uneven release of their contents. For this purpose, the injection valve 66 and the relief valve 72 are actively controlled through the control device 43. In this way, the contents of each compressed gas tank 15 to 19 can be released below the allowable operating system limit pressure, while at least one of the compressed gas tanks 15 to 19 remains energized at at least the allowable operating system limit pressure. In this way, a defined amount of compressed gas, particularly hydrogen, is retained in the compressed gas tanks from which the contents have been released below the allowable operating system limit pressure and can subsequently be used for conditioning the fuel cell system 1 at system startup.

[0044] The active opening of the injection path 65 by the control device 43 via the injection valve 66 enables the operation of the compressed gas supply system 34 by the fuel cell system 1 even under various different tank pressures. The switching valves 66 and 72 are individually controlled according to the operating mode of the vehicle equipped with the fuel cell system 1 and the compressed gas supply system 34, such as driving, parking, and tank filling.

[0045] Precise temporal control or regulation of the pressure and / or temperature of individual compressed gas tanks 15 to 19 has the advantage of enabling pressure reductions below the system's limit pressure. Such reductions are particularly preferable under system modes, such as when pre-injecting the system from low-pressure compressed gas tanks, i.e., when hydrogen is injected, or when hydrogen conditioning is performed for operation. Such conditioning can be performed down to very low residual pressures, thereby extending the system's operating range.

[0046] The method of applying for rights enables precise and time-dependent control of compressed gas tank temperatures through optimized extraction strategies from individual compressed gas tanks. In this way, the compressed gas tank temperature in each compressed gas tank can be limited to improve operational safety. Rising in compressed gas tank temperatures can be addressed early through derating via actively switchable valves.

[0047] In cases where the compressed gas tanks have different pressures at the time of tank filling, the check valve 67 in the injection path 65 automatically operates for cascaded tank filling after the injection valve 66 is switched. The compressed gas tank in question is only filled when the current pressure of that tank is exceeded at the time of tank filling. [Explanation of Symbols]

[0048] 1. Fuel cell system 2 Anode Paths 15, 16, 17, 18, 19 Compressed gas tanks 21, 22, 23, 24, 25 Valve device 26, 27, 28 Valve device 34 Compressed Gas Supply System 43 Control device 60 Sensor Devices 65 Injection routes 66 Injection valve 70 Relief routes 72 Relief valve

Claims

1. A method for operating and / or filling a compressed gas supply system (34) having at least two compressed gas tanks (15, 16, 17, 18, 19) connected to the anode path (2) of a fuel cell system (1), The compressed gas supply system (34) comprises a valve device (21, 22, 23, 24, 25) attached to each of the compressed gas tanks (15, 16, 17, 18, 19), and a control device (43) that individually controls the valve device. Each of the valve devices (21, 22, 23, 24, 25) comprises an injection path (65) having an actively switchable injection valve (66), a relief path (70) having an actively switchable relief valve (72), and at least one sensor device (60) for detecting the current temperature of the compressed gas in the valve device. The method is characterized in that the control device (43) individually controls the injection valve (66) and the relief valve (72) in each of the valve devices (21, 22, 23, 24, 25) based on the temperature detection result by the sensor device (60).

2. The method according to claim 1, characterized in that the control device (43) is equipped with a data set product including reference data and / or limit data of the fluid, and uses this to control, during the tank filling process and / or when the compressed gas supply system (34) is in operation, the relief path (70) of the valve device (21, 22, 23, 24, 25) to be opened through the relief valve (72) depending on the current temperature detected by the valve device (21, 22, 23, 24, 25), so that the heat entering the compressed gas tank (15, 16, 17, 18, 19) corresponding to the relief valve (72) is discharged from the compressed gas tank, thereby keeping the compressed gas tank temperature in the compressed gas tank below a first limit temperature.

3. The method according to claim 2, characterized in that the control device (43) is equipped with a data set product including reference data and / or limit data of fluid, and using this, during the tank filling process, the valve devices (21, 22, 23, 24, 25) are controlled in accordance with the current temperature detected by the valve devices (21, 22, 23, 24, 25), and when the detected temperature reaches a second limit temperature higher than the first limit temperature, the injection valve (66) of the valve devices (21, 22, 23, 24, 25) is controlled to limit the filling of compressed gas, thereby limiting the rise in the compressed gas tank temperature in one of the compressed gas tanks (15, 16, 17, 18, 19).

4. The method according to claim 2, characterized in that, in order to satisfy a predetermined safety requirement, the injection path (65) of the compressed gas tanks (15, 16, 17, 18, 19) whose detected compressed gas tank temperature is below the first limit temperature is released through the injection valve (66) of the valve device (21, 22, 23, 24, 25), respectively.

5. The method according to claim 3, characterized in that, in order to satisfy a predetermined safety requirement, the injection path (65) of the compressed gas tanks (15, 16, 17, 18, 19) whose detected compressed gas tank temperature is below the first limit temperature is released through the injection valve (66) of the valve device (21, 22, 23, 24, 25), respectively.

6. The method according to any one of claims 1 to 5, characterized in that the injection path (65) and / or the relief path (70) of the valve device (21, 22, 23, 24, 25) are controlled via the control device (43) in order to control the compressed gas tank temperature in the compressed gas tank (15, 16, 17, 18, 19) over time.

7. The method according to any one of claims 1 to 5, characterized in that, when the compressed gas tanks (15, 16, 17, 18, 19) each have different internal pressures when the tanks are filled, the compressed gas tanks (15, 16, 17, 18, 19) are filled in a cascading manner based on the control of the injection valve (66) through the check valve (67) in the injection path (65) of the attached valve device (21, 22, 23, 24, 25).

8. The method according to any one of claims 1 to 5, characterized in that the compressed gas tanks (15, 16, 17, 18, 19), each having a different storage volume, are filled not simultaneously but at a time staggered rate through the attached injection paths (65), and the injection paths (65) of the compressed gas tanks with larger storage volumes (15, 16, 17) are released through the control device (43) at a time earlier than the injection paths (65) of the compressed gas tanks with smaller storage volumes (18, 19).

9. The method according to any one of claims 1 to 5, characterized in that, in order to perform internal equilibrium in the compressed gas supply system (34), compressed gas is transferred between each of the compressed gas tanks (15, 16, 17, 18, 19) via the attached valve devices (21, 22, 23, 24, 25).

10. A vehicle control device (43) set up to carry out the method described in any one of claims 1 to 5.

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