DE102024206294A1 - Methods for detecting at least one sensor drift - Google Patents

Abstract

Method for detecting at least one sensor drift (delta_p) of a first sensor (10) in a hydrogen tank system (100), comprising the hydrogen tank system (100):
- at least one first sensor (10) for measuring at least one first measured value (p1, T1), for example a first pressure (p1) that is specific to the hydrogen tank system (100),
- a filling nozzle (50) for filling the hydrogen tank system (100) with hydrogen, wherein the filling nozzle (50) is connectable to a filling device (250) of a filling station (200) for filling, comprising the method:
- Connecting (110) the filling nozzle (50) to a filling device (250) of a filling station (200) for filling the hydrogen tank system (100) with hydrogen,
- Measuring (120) at least one first measured value (p1, T1) by the at least one first sensor (10) in the hydrogen tank system (100),
- Measuring (130) at least one second measured value (p2, T2), for example a second pressure (p2) that is specific to the filling device (250),
- Determine (140), by a control unit (HSCU) of the hydrogen tank system (100), a sensor drift (delta_p) of at least one first sensor (10) as a function of the first measured value (p1, T1) and the second measured value (p2, T2).

Description

The invention relates to a method for detecting at least one sensor drift with the features of the independent method claim, a hydrogen tank system with the features of the independent device claim, a computer program product with the features of the independent patent claim relating to a computer program product, a computer-readable data carrier with the features of the independent patent claim relating to a computer-readable data carrier, a control unit with the features of the independent patent claim relating to a control unit, and a vehicle with the features of the independent vehicle claim.

Hydrogen tank systems designed for storing hydrogen are well-known. These can be installed in a vehicle. Such hydrogen tank systems may need to be filled or refilled at a filling station. To detect this and/or other situations, at least one sensor, for example for pressure and/or temperature, can be integrated into the hydrogen tank system.

The current state of the art has its drawbacks. Sensors are exposed to various influences that can negatively affect the accuracy and/or reliability of their readings. These can include aging, contamination, icing, and/or wear. In such cases, while it may still be possible to acquire measurements, these may be inaccurate and/or incorrect, a phenomenon known as sensor drift. Furthermore, the readings from a sensor exhibiting sensor drift may deviate from the actual values, such as temperature or pressure present at the sensor. Existing systems and/or methods may not be able to detect and/or compensate for this drift sufficiently.

Advantages of the invention

It is therefore an object of the present invention to overcome at least one of the disadvantages described above, at least partially. In particular, it is an object of the invention to provide an improved method for detecting sensor drift. Furthermore, it may be provided to make better use of (additional) information, reference values, and/or measured values. It may also be provided to enable improved compensation and/or acquisition of measured values.

The foregoing problem is solved by a method for detecting at least one sensor drift with the features of the independent method claim, a hydrogen tank system with the features of the independent device claim, a computer program product with the features of the independent patent claim relating to a computer program product, a computer-readable data carrier with the features of the independent patent claim relating to a computer-readable data carrier, a control unit with the features of the independent patent claim relating to a control unit, and a vehicle with the features of the independent vehicle claim. Further features and details of the invention will become apparent from the dependent claims, the description, and the drawings. Features and details described in connection with the method according to the invention naturally also apply in connection with the hydrogen tank system according to the invention and/or in connection with the computer program product according to the invention and/or in connection with the computer-readable data carrier according to the invention and/or in connection with the control unit according to the invention and/or in connection with the vehicle according to the invention, and vice versa, so that the disclosure relating to the individual aspects of the invention always makes or can make reciprocal reference. In particular, advantages described within the first, second, third, fourth, fifth, and/or sixth aspect also apply to the first, second, third, fourth, fifth, and/or sixth aspect.

• - zumindest einen ersten Sensor (eingerichtet) zum Messen von zumindest einem ersten Messwert, vorzugsweise einem ersten Druck, der für das Wasserstofftanksystem spezifisch ist,
• - einen Füllstutzen (eingerichtet) zum Befüllen des Wasserstofftanksystems mit Wasserstoff, wobei der Füllstutzen mit einer Füllvorrichtung einer (externen) Tankstelle zum Befüllen verbindbar ist,

das Verfahren aufweisend:

• - Verbinden (Anschließen/Koppeln) des Füllstutzens mit einer Füllvorrichtung (z.B. einem Zapfhahn) einer Tankstelle zum Befüllen des Wasserstofftanksystems mit Wasserstoff,
• - (erstes) Messen von zumindest einem ersten Messwert, insbesondere einem ersten Druck, durch den zumindest einen ersten Sensor im Wasserstofftanksystem,
• - (zweites) Messen von zumindest einem zweiten Messwert, beispielsweise einem zweiten Druck, der für die Füllvorrichtung spezifisch ist,
• - Ermitteln, durch eine Steuereinheit des Wasserstofftanksystems, einer Sensordrift des zumindest einen ersten Sensors in Abhängigkeit von dem ersten Messwert und dem zweiten Messwert.

The above problem is solved according to a first aspect by a method for detecting at least one sensor drift of a first sensor in a hydrogen tank system (or a hydrogen tank system) comprising the hydrogen tank system:

• - at least one first sensor (installed) for measuring at least one first measured value, preferably a first pressure specific to the hydrogen tank system,
• - a filling nozzle (equipped) for filling the hydrogen tank system with hydrogen, wherein the filling nozzle is connectable to a filling device of an (external) filling station for filling,

demonstrating the procedure:

• - Connecting (attaching/coupling) the filling nozzle to a filling device (e.g. a nozzle) at a filling station to fill the hydrogen tank system with hydrogen,
• - (First) measurement of at least one initial measurement value, in particular an initial pressure, by which at least one initial sensor in the hydrogen tank system,
• - (second) measurement of at least one second measured value, for example a second pressure that is specific to the filling device,
• - Determine, by a control unit of the hydrogen tank system, a sensor drift of at least one first sensor as a function of the first measured value and the second measured value.

The method described in the first aspect can be computer-implemented and/or performed repeatedly and/or continuously. Preferably, the method can be performed during, before, and/or (preferably) during the filling or use of a vehicle and/or control unit and/or a refueling station, for example, during a vehicle refueling stop. Alternatively or additionally, the method can be performed at (regular) intervals, for example, every hundred milliseconds. It can also be provided that the method is always and/or only performed during the filling of the hydrogen tank system, particularly at a refueling station. This prevents (undesired) overloading of the control unit at other times. This relieves the processing unit and/or control unit. The control unit can implement the method, for example, by performing and/or controlling (e.g., corresponding sensors, interfaces, and/or actuators) the steps mentioned above. The method enables sensor drift to be detected efficiently and/or more reliably. Furthermore, it may be possible to compensate for sensor measurement data, particularly depending on detected sensor drift. This enables more precise and/or improved operation, for example, of the hydrogen tank system and/or the vehicle. For instance, hydrogen shortages can be detected more accurately, reliably, and/or effectively. This can be advantageous for planning and/or determining refueling stops, for example, autonomously and/or automatically via the control unit.

The hydrogen tank system can be configured to store hydrogen. This hydrogen can be pressurized, in particular, it can have a primary pressure, e.g., 700 bar. The hydrogen tank system can have at least one (or more) tank(s) in which the hydrogen is stored. A tank can have a valve (e.g., controllable via an actuator) to close the tank. The valve can be located, for example, at the tank's inlet. It can be provided that a tank, in particular an inlet of the tank, has the primary sensor. Alternatively or additionally, it can be provided that a distributor has a (further) primary sensor. This allows primary sensors to be located at different positions within the hydrogen tank system. The process can then be carried out for one or more of these sensors. Information can thus be generated depending on the different sensors (e.g., characteristic curves). A tank, in particular each tank, can be connected to the distributor, for example, via an inlet of the tank. The tank or distributor can be connected to a user system (e.g., a fuel cell) via a supply line. The tank or distributor can also be connected via (at least) a first supply line to a filling port (of the hydrogen tank system), which is designed for filling with hydrogen, e.g., by connecting it to a filling device. It is possible for the (first) pressure in the hydrogen tank system to be essentially uniform throughout. Alternatively, it is possible for the (first) pressure to differ (at least slightly) at different locations.

It may be provided that the (first) measurement of a first measured value, in particular a first pressure and/or a first temperature, by the at least one sensor, preferably takes place after the filling nozzle has been connected to a filling device of an (external) filling station.

The (second) measurement of at least one measured value can preferably be carried out by a second sensor, which is located in the filling station, preferably in and/or on the filling device. This can therefore be an external sensor. Advantageously, this sensor can be used as a reference value and/or gold standard. This makes it easier and/or more effective to detect changes in the hydrogen tank system, particularly in the first sensor.

The measurement can be performed by a control unit of the hydrogen tank system. The sensor drift can be determined or ascertained as a function of the first (internal) measurement value of the first sensor and the second (external) measurement value of the second (external) sensor.

Within the scope of the invention, it can be advantageous that the connection involves establishing an (external) data connection between the control unit. of the hydrogen tank system and an interface of the filling station, wherein preferably the filling station transmits the at least one second measured value, for example a second pressure, and/or a second calculated value, in particular a diameter, a heat transfer coefficient, a coefficient of friction and/or a length of the filling device, which is specific to the filling device, to the control unit via the external data connection.

The second calculation parameter can also provide a mass of the (refueled) hydrogen and/or a mass flow rate of (refueled) hydrogen, as well as other parameters, measurements, and/or values. Depending on this, the control unit can calculate a modeled pressure loss and/or a modeled pressure, for example, based on simulation data and/or a (thermodynamic) model of the hydrogen tank system and/or the filling station, especially the filling device.

Within the scope of the invention, it is conceivable that the measurement of at least one first measured value, for example a first pressure, is carried out by the at least one first sensor in the hydrogen tank system, which is equipped for this purpose, wherein the measurement includes a transmission of the at least one first measured value, in particular via an internal data connection, to the control unit of the hydrogen tank system.

Within the scope of the invention, it may be provided that the measurement of at least one second measured value, for example a second pressure specific to the filling device, is carried out by a second sensor of the filling station, in particular of the filling device, which is equipped to measure the at least one second measured value, in particular to measure a second pressure.

Within the scope of the invention, it may be preferentially provided to use a first and/or second pressure. Alternatively or additionally, and in particular analogously, it may also be provided to use a first and/or second temperature. It is also conceivable that the method can be carried out for further/other sensors and/or sensor positions, for example, a third sensor in the distributor, in addition to a first sensor at the inlet of a tank and/or a second sensor in the filling device.

It is also conceivable that the determination includes calculating a modeled (or expected, simulated, calculated and/or predicted) pressure loss delta_p_mod as a function of at least one second measured value, and in particular as a function of the second calculated variable, where the pressure loss is specific to the filling station, in particular the filling device, and the hydrogen tank system.

Therefore, the following can apply: $$\text{delta\_p\_mod}=\text{f}\left(\text{p}\mathrm{2,}\text{D}\mathrm{2,}\text{L}2\right)$$

This can additionally or alternatively be performed based on a first calculated parameter specific to the hydrogen tank system (e.g., stored in a storage unit, system-specific), such as the pipework and/or the position of the first sensor. In other words, based on the (already available) information about the hydrogen tank system and the information transmitted by the filling station, the control unit can calculate (e.g., using a parameterized model and/or a simulation, see also above) how the first measured value, in particular the first pressure (and/or the first temperature) within the hydrogen tank system (during filling), should be configured. For example, the geometric configuration of the hydrogen tank system can be stored and/or pre-simulated. Depending on the second measured value and/or the second calculated parameter, the modeled pressure loss can then be calculated (e.g., using flow equations and/or simulations). Preferably, the first measured value can be validated or verified by comparing it with these values (see below). Preferably, the modeled pressure loss can represent a (modeled) pressure difference originating from the position of the second sensor (in the filling device) via the lines to the position of the first sensor. Accordingly, the modeled pressure loss can represent a (calculated) pressure loss between the position of the second sensor and the first sensor.

It is also conceivable that the determination includes calculating at least one modeled pressure, which is preferably specific for an expected first measured value, in particular for a first pressure, of the at least one first sensor, wherein the calculation of the modeled pressure is carried out as a function of the at least second measured value, for example a second pressure, and in particular a modeled pressure loss.

Preferably, the modeled pressure can be calculated by subtracting the (previously determined) modeled pressure loss from at least one second measured value, in particular the second pressure (by the control unit). In other words, the modeled pressure loss can be calculated by subtracting the (previously determined) modeled pressure loss from the at least one second measured value, in particular the second pressure. For example, a pressure loss along the (supply) line and/or the filling device (at the filling station) can be calculated. The difference can then be used to determine how the pressure at the height and/or position of at least one initial sensor should be designed, based on this pressure loss.

Therefore, the following can apply: $$\text{p\_mod}=\text{p}2-\text{delta}\_\text{p}\_\text{mod}$$

• - positives Feststellen einer Sensordrift (z.B. Sensordrift liegt vor), wenn eine Differenz, insbesondere der Betrag der Differenz, zwischen dem zumindest einen ersten Messwert, insbesondere eines ersten Drucks, und dem modellierten Druck größer (oder gleich) dem Schwellwert ist,
• - negatives Feststellen einer Sensordrift (z.B. Sensordrift liegt nicht vor), wenn eine Differenz, insbesondere der Betrag der Differenz, zwischen dem zumindest einen ersten Messwert, insbesondere eines ersten Drucks, und dem modellierten Druck kleiner (oder gleich) dem Schwellwert ist.

Within the scope of the invention, it is optionally possible that determining a sensor drift of the at least one first sensor as a function of the first measured value and the second measured value includes determining a sensor drift as a function of a threshold value (previously defined, e.g. stored in the memory unit of the control unit), in particular comprising:

• - positive detection of sensor drift (e.g. sensor drift is present) if a difference, in particular the amount of the difference, between the at least one first measured value, in particular a first pressure, and the modeled pressure is greater than (or equal to) the threshold value,
• - negative detection of sensor drift (e.g. sensor drift is not present) if a difference, in particular the amount of the difference, between the at least one first measured value, in particular a first pressure, and the modeled pressure is less than (or equal to) the threshold value.

Therefore, the following can apply (for a positive finding): $$\left|\text{p\_mod}-\text{p}1\right|>\text{p\_schwell}$$

This allows for a (quantified and/or objective) determination of whether sensor drift, in particular an altered or falsified (initial) measurement, is present. Sensor drift can be detected using external information from the gas station.

Furthermore, within the scope of the invention, it may be provided that the determination includes calculating an adaptation value which is configured to provide a corrected first measured value as a function of the at least one first measured value, in particular the at least one first pressure, and in particular the sensor drift, wherein in particular the adaptation value is calculated by subtracting the at least one first measured value, in particular the at least one first pressure, from the modeled pressure.

Therefore, the following can apply: $$\text{delta\_p\_off}=\text{p\_mod}-\text{p}1$$

This allows the deviation to be advantageously quantified (objectively and/or more accurately).

With regard to the present invention, it is conceivable that the determination includes calculating a corrected first measured value, wherein in particular the calculation is performed depending on the at least one first measured value, in particular a first pressure, and an adaptation value (or the above one), in particular by subtraction (or addition).

Therefore, the following can apply: $${\text{p}}_{\text{korr}}=\text{p}1-\text{delta\_p\_off}$$

Accordingly, it may be possible to calculate a corrected first measurement value by subtracting the adaptation value from the at least one first measurement value. Therefore, (at least) one corrected first measurement value can be specific to an actual measurement value, in particular to an actual first pressure and/or temperature, which, for example, is present at the altitude and/or position of the at least one first sensor.

The method can be performed for various operating points, e.g., different pressures, temperatures, and/or times (for example, during refueling). This can result in a large number and/or a series of measured values and/or corrected values. These can be compared with expected trends and/or historical data. For this purpose, the hydrogen tank system can be connected to a backend, preferably via a data connection. Historical data can be stored and/or retrieved there. It can also be provided that, for example, depending on the historical data and/or by comparison, a malfunction of at least one second sensor and/or the filling station is detected. It can also be provided that, within the scope of the invention, an incorrect or leaking connection between the filling device and the filling nozzle is detected, particularly depending on the determination.

• - zumindest einen ersten Sensor zum Messen von zumindest einem ersten Messwert, beispielsweise einem ersten Druck, der für das Wasserstofftanksystem spezifisch ist,
• - einen Füllstutzen zum Befüllen des Wasserstofftanksystems mit Wasserstoff, wobei der Füllstutzen mit einer Füllvorrichtung einer Tankstelle zum Befüllen verbindbar ist,

wobei das Wasserstofftanksystem dazu eingerichtet ist, das Verfahren nach einem der vorhergehenden Ansprüche zu implementieren.The above problem is solved according to a second aspect by a hydrogen tank system according to the invention for detecting at least one sensor drift of a first sensor in the hydrogen tank system, which includes the hydrogen tank system:

• - at least one initial sensor for measuring at least one initial measurement value, for example an initial pressure specific to the hydrogen tank system,
• - a filling nozzle for filling the hydrogen tank system with hydrogen, wherein the filling nozzle is connectable to a filling device of a filling station for filling,

wherein the hydrogen tank system is configured to implement the method according to one of the preceding claims.

The hydrogen tank system may preferably include a control unit, particularly as described in the fifth aspect. The hydrogen tank system may preferably implement and/or carry out the process in conjunction with a filling station.

This results in the same advantages with regard to a hydrogen tank system according to the invention as have already been described with regard to a method according to the invention.

The above problem is solved according to a third aspect by a computer program product according to the invention, comprising instructions which, when the computer program product is executed by a computer, cause it to implement the method according to one of the preceding claims.

This results in the same advantages with regard to a computer program product according to the invention as have already been described with regard to a method according to the invention and/or a hydrogen tank system according to the invention.

The above problem is solved according to a fourth aspect by a computer-readable data carrier according to the invention, in which instructions are stored which, when executed by a computer, cause it to carry out the method according to one of the preceding claims.

This results in the same advantages with regard to a computer-readable data carrier according to the invention as have already been described with regard to a method according to the invention and/or a hydrogen tank system according to the invention and/or a computer program product according to the invention.

The above problem is solved according to a fifth aspect by a control unit according to the invention, comprising a computing unit and/or a storage unit in which instructions are stored which, when at least partially executed by the computing unit, carry out a method according to one of the preceding claims.

• - dem zumindest ersten Sensor,
• - der Tankstelle, insbesondere über eine Schnittstelle der Tankstelle, insbesondere dem zweiten Sensor bzw. der Füllvorrichtung, wobei dies insbesondere kabelgebunden und/oder kabellos erfolgen kann,
• - den Ventilen des Wasserstofftanksystems, und/oder
• - dem Füllstutzen, insbesondere einem Füllsensor des Füllstutzens, welcher dazu eingerichtet ist eine Füllvorrichtung, insbesondere die Anordnung der Füllvorrichtung in dem Füllstutzen, zu erkennen.

The control unit can be configured to implement the procedure. For this purpose, the control unit can be connected, in particular via a data connection, to at least one of the following units:

• - at least the first sensor,
• - the filling station, in particular via an interface of the filling station, in particular the second sensor or the filling device, whereby this can be done in particular via cable and/or wirelessly,
• - the valves of the hydrogen tank system, and/or
• - the filling nozzle, in particular a filling sensor of the filling nozzle, which is designed to detect a filling device, in particular the arrangement of the filling device in the filling nozzle.

Preferably, information and/or initial calculation parameters can be stored in the control unit, in particular in a storage unit of the control unit.

This results in the same advantages with regard to a control unit according to the invention as have already been described with regard to a method according to the invention and/or a hydrogen tank system according to the invention and/or a computer program product according to the invention and/or a computer-readable data carrier according to the invention.

The above problem is solved according to a sixth aspect by a vehicle according to the invention comprising a control unit according to the preceding claim and/or a hydrogen tank system according to one of the preceding claims.

This results in the same advantages with regard to a vehicle according to the invention as have already been described with regard to a method according to the invention and/or a hydrogen tank system according to the invention and/or a computer program product according to the invention and/or a computer-readable data carrier according to the invention and/or a control unit according to the invention.

Further advantages, features, and details of the invention will become apparent from the following description, in which several exemplary embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination.

Drawings

• 1 ein Fahrzeug mit einem Wasserstofftanksystem,
• 2 ein Wasserstofftanksystem und eine Tankstelle, und
• 3 ein Verfahren.

Each schematically illustrates:

• 1 a vehicle with a hydrogen tank system,
• 2 a hydrogen tank system and a filling station, and
• 3 a procedure.

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

Description of the exemplary implementations

1 Figure 3 shows a vehicle 300 with a hydrogen tank system 100, which has a control unit HSCU with a computing unit CU and a storage unit MU. The hydrogen tank system 100 can have a first sensor 10.

2 Figure 1 shows a hydrogen tank system 100 connected to a filling station 200. The hydrogen tank system 100 comprises one (or two or more) tank(s) 20 for receiving or storing hydrogen. The tank 20 can be connected to a distributor 30 and/or have a first sensor 10, particularly near the tank inlet. The sensor 10 can measure a first measured value p1, T1, in particular a first pressure p1. The hydrogen tank system 100 can have a control unit HSCU with a processing unit CU and a storage unit MU, which can be connected to the first sensor 10 via an internal data connection Dat_int. The hydrogen tank system 100, in particular the distributor 30, can be connected to a filling port 50 via a first (supply) line 40. Filling or refueling can take place via the filling port 50, for example by performing a connection 110. A filling device 250 of the filling station 200 can be connected to the filling nozzle 50. The filling station 200, in particular the filling device 250, can have a second sensor 210, which can be configured to measure 130 a second measured value p2, T2, in particular a second pressure p2. An interface 230, in particular of a control unit of the filling station 200, can be connected to the second sensor 210 via a data connection. The interface 230 can be connected to the control unit HSCU via an external data connection Dat_ext.

• - zumindest einen ersten Sensor 10 zum Messen von zumindest einem ersten Messwert p1, T1, beispielsweise einem ersten Druck p1, der für das Wasserstofftanksystem 100 spezifisch ist,
• - einen Füllstutzen 50 zum Befüllen des Wasserstofftanksystems 100 mit Wasserstoff, wobei der Füllstutzen 50 mit einer Füllvorrichtung 250 einer Tankstelle 200 zum Befüllen verbindbar ist,

das Verfahren aufweisend:

• - Verbinden 110 des Füllstutzens 50 mit einer Füllvorrichtung 250 einer Tankstelle 200 zum Befüllen des Wasserstofftanksystems 100 mit Wasserstoff,
• - Messen 120 von zumindest einem ersten Messwert p1, T1, insbesondere einem ersten Druck p1, durch den zumindest einen ersten Sensor 10 im Wasserstofftanksystem 100,
• - Messen 130 von zumindest einem zweiten Messwert p2, T2, beispielsweise einem zweiten Druck p2, der für die Füllvorrichtung 250 spezifisch ist,
• - Ermitteln 140, durch eine Steuereinheit HSCU des Wasserstofftanksystems 100, einer Sensordrift delta_p des zumindest einen ersten Sensors 10 in Abhängigkeit von dem ersten Messwert p1, T1 und dem zweiten Messwert p2, T2.

3 shows a method for detecting at least one sensor drift delta_p of a first sensor 10 in a hydrogen tank system 100, comprising the hydrogen tank system 100:

• - at least one first sensor 10 for measuring at least one first measured value p1, T1, for example a first pressure p1, which is specific for the hydrogen tank system 100,
• - a filling nozzle 50 for filling the hydrogen tank system 100 with hydrogen, wherein the filling nozzle 50 can be connected to a filling device 250 of a filling station 200 for filling,

demonstrating the procedure:

• - Connect 110 of the filling nozzle 50 to a filling device 250 of a filling station 200 for filling the hydrogen tank system 100 with hydrogen,
• - Measure 120 of at least one first measured value p1, T1, in particular a first pressure p1, by which at least one first sensor 10 in the hydrogen tank system 100,
• - Measure 130 of at least one second measured value p2, T2, for example a second pressure p2 that is specific for the filling device 250,
• - Determine 140, by means of a control unit HSCU of the hydrogen tank system 100, a sensor drift delta_p of at least one first sensor 10 as a function of the first measured value p1, T1 and the second measured value p2, T2.

It may be provided that the connection 110 includes establishing 111 an external data connection Dat_ext between the control unit HSCU of the hydrogen tank system 100 and an interface 230 of the filling station 200, wherein preferably the filling station 200 transmits via the external data connection Dat_ext the at least one second measured value p2, T2, for example a second pressure p2, and/or a second calculated value D2, L2, in particular a diameter D2 and a length L2 of the filling device 250, which is specific for the filling device 250, to the control unit HSCU.

It may be provided that the measurement of 120 of at least one initial measurement value p1, T1, for example a first pressure p1, by which at least a first sensor 10 in the hydrogen tank system 100 is carried out, which is set up for this purpose, wherein the measuring 120 includes a transmission 121 of the at least one first measured value p1, T1, in particular via an internal data connection Dat_int, to the control unit HSCU of the hydrogen tank system 100.

It may be provided that the measurement 130 of at least one second measured value p2, T2, for example a second pressure p2, which is specific for the filling device 250, is carried out by a second sensor 210 of the filling station 200, in particular of the filling device 250, which is set up to measure 130 the at least one second measured value p2, T2, in particular to measure 130 a second pressure p2.

It may be provided that the determination 140 includes a calculation 141 of a modeled pressure loss delta_p_mod depending on the at least one second measured value p2, T2, and in particular depending on the second calculated variable D2, L2, wherein the pressure loss delta_p_mod is specific for the filling station 200, in particular the filling device 250, and the hydrogen tank system 100.

It may be provided that the determination 140 includes a calculation 142 of at least one modeled pressure p_mod, which is specific for an expected first measured value p1, T1, in particular for a first pressure p1, of the at least one first sensor 10, wherein the calculation 142 of the modeled pressure p_mod is carried out as a function of the at least second measured value p2, T2, for example a second pressure p2, and in particular a modeled pressure loss delta_p_mod.

• - positives Feststellen 144 einer Sensordrift delta_p, wenn eine Differenz, insbesondere der Betrag der Differenz, zwischen dem zumindest einen ersten Messwert p1, T1, insbesondere eines ersten Drucks p1, und dem modellierten Druck p_mod größer dem Schwellwert p_schwell ist,
• - negatives Feststellen 145 eines Sensordrifts delta_p, wenn eine Differenz, insbesondere der Betrag der Differenz, zwischen dem zumindest einen ersten Messwert p1, T1, insbesondere eines ersten Drucks p1, und dem modellierten Druck p_mod kleiner dem Schwellwert p_schwell ist.

It may be provided that determining 140 a sensor drift delta_p of at least one first sensor 10 as a function of the first measured value p1, T1 and the second measured value p2, T2 includes determining 143 a sensor drift delta_p as a function of a threshold value p_threshold, in particular comprising:

• - positive detection 144 of a sensor drift delta_p, if a difference, in particular the amount of the difference, between the at least one first measured value p1, T1, in particular a first pressure p1, and the modeled pressure p_mod is greater than the threshold p_threshold,
• - negative detection 145 of a sensor drift delta_p, if a difference, in particular the amount of the difference, between the at least one first measured value p1, T1, in particular a first pressure p1, and the modeled pressure p_mod is less than the threshold p_threshold.

It may be provided that the determination 140 includes a calculation 146 of an adaptation value delta_p_off, which is set up to provide a corrected first measurement p1_korr as a function of the at least one first measurement p1, T1, in particular the at least one first pressure p1, and the sensor drift delta_p, wherein in particular the adaptation value delta_p_off is calculated by subtracting 147 the at least one first measurement p1, T1, in particular the at least one first pressure p1, from the modeled pressure p_mod.

It may be provided that the determination 140 includes a calculation 148 of a corrected first measurement value p_corr, wherein in particular the calculation 148 is calculated as a function of the at least one first measurement value p1, T1, in particular a first pressure p1, and an adaptation value delta_p_off, in particular by subtraction.

Reference symbol list

10

first sensor

20

tank

30

Distribution

40

first (supply) line

50

Filling nozzle

100

Hydrogen tank system

HSCU

control unit

CU

computing unit

MU

Storage unit

Dat_int

internal data connection

110

Connecting the filling nozzle to a filling device

111

Establishing an external data connection

120

Measuring at least one initial measurement

121

Transmitting at least one initial measurement

130

Measuring at least one second measurement

140

Determining sensor drift

141

Calculating a modeled pressure loss

142

Calculating a modeled pressure

143

Detecting sensor drift

144

Positive detection of sensor drift

145

Negative detection of sensor drift

146

Calculating an adaptation value

147

Subtract

148

Calculating a corrected first measurement value

200

gas station

210

second sensor

230

interface

250

Filling device

Dat_ext

external data connection

300

vehicle

p1, T1

first measurement

p1

first printing

p2, T2

second measurement

p2

second print

D2, L2

second calculation parameter

D2

Diameter of the filling device

L2

Length of the filling device

delta_p_mod

modeled pressure loss

p_mod

modeled print

p_threshold

threshold

delta_p

Sensor drift

delta_p_off

Adaptation value

p_corr

corrected first measurement

Claims (14)

Method for detecting at least one sensor drift (delta_p) of a first sensor (10) in a hydrogen tank system (100), the hydrogen tank system (100) comprising: - at least one first sensor (10) for measuring at least one first measured value (p1, T1), for example, a first pressure (p1) specific to the hydrogen tank system (100), - a filling nozzle (50) for filling the hydrogen tank system (100) with hydrogen, wherein the filling nozzle (50) is connectable to a filling device (250) of a filling station (200) for filling, the method comprising: - connecting (110) the filling nozzle (50) to a filling device (250) of a filling station (200) for filling the hydrogen tank system (100) with hydrogen, - measuring (120) at least one first measured value (p1, T1), in particular a first pressure (p1), by which at least one first sensor (10) in the Hydrogen tank system (100), - Measuring (130) at least one second measured value (p2, T2), for example a second pressure (p2) specific to the filling device (250), - Determining (140) by a control unit (HSCU) of the hydrogen tank system (100), a sensor drift (delta_p) of the at least one first sensor (10) as a function of the first measured value (p1, T1) and the second measured value (p2, T2). Procedure according to Claim 1 , characterized in that the connection (110) comprises establishing (111) an external data connection (Dat_ext) between the control unit (HSCU) of the hydrogen tank system (100) and an interface (230) of the filling station (200), wherein preferably the filling station (200) transmits the at least one second measured value (p2, T2), for example a second pressure (p2), and/or a second calculated value (D2, L2), in particular a diameter (D2) and a length (L2) of the filling device (250), which is specific to the filling device (250), to the control unit (HSCU) via the external data connection (Dat_ext). Method according to one of the preceding claims, characterized in that the measurement (120) of at least one first measured value (p1, T1), for example a first pressure (p1), is carried out by the at least one first sensor (10) in the hydrogen tank system (100), which is configured for this purpose, wherein the measurement (120) comprises a transmission (121) of the at least one first measured value (p1, T1), in particular via an internal data connection (Dat_int), to the control unit (HSCU) of the hydrogen tank system (100). Method according to one of the preceding claims, characterized in that the measurement (130) of at least one second measured value (p2, T2), for example a second pressure (p2), which is specific for the filling device (250), is carried out by a second sensor (210) of the filling station (200), in particular of the filling device (250), which is configured to measure (130) the at least one second measured value (p2, T2), in particular to measure (130) a second pressure (p2). A method according to one of the preceding claims, characterized in that the determination (140) is a calculation (141) of a modeled ten pressure loss (delta_p_mod) as a function of at least one second measured value (p2, T2) and in particular as a function of the second calculated variable (D2, L2), wherein the pressure loss (delta_p_mod) is specific for the filling station (200), in particular the filling device (250), and the hydrogen tank system (100). Method according to one of the preceding claims, characterized in that the determination (140) comprises a calculation (142) of at least one modeled pressure (p_mod) which is specific for an expected first measured value (p1, T1), in particular for a first pressure (p1), of the at least one first sensor (10), wherein the calculation (142) of the modeled pressure (p_mod) is carried out as a function of the at least second measured value (p2, T2), for example a second pressure (p2), and in particular a modeled pressure loss (delta_p_mod). A method according to one of the preceding claims, characterized in that determining (140) a sensor drift (delta_p) of the at least one first sensor (10) as a function of the first measured value (p1, T1) and the second measured value (p2, T2) comprises detecting (143) a sensor drift (delta_p) as a function of a threshold value (p_threshold), in particular comprising: - positive detection (144) of a sensor drift (delta_p) if a difference, in particular the magnitude of the difference, between the at least one first measured value (p1, T1), in particular a first pressure (p1), and the modeled pressure (p_mod) is greater than the threshold value (p_threshold), - negative detection (145) of a sensor drift (delta_p) if a difference, in particular the magnitude of the difference, between the at least one first measured value (p1, T1), in particular a first pressure (p1), and the modeled pressure (p_mod) is less than the threshold value (p_threshold) is. Method according to one of the preceding claims, characterized in that the determination (140) comprises a calculation (146) of an adaptation value (delta_p_off) which is configured to provide a corrected first measurement value (p1_korr) as a function of the at least one first measurement value (p1, T1), in particular the at least one first pressure (p1), and the sensor drift (delta_p), wherein in particular the adaptation value (delta_p_off) is calculated by subtracting (147) the at least one first measurement value (p1, T1), in particular the at least one first pressure (p1), from the modeled pressure (p_mod). Method according to one of the preceding claims, characterized in that the determination (140) comprises a calculation (148) of a corrected first measured value (p_corr), wherein in particular the calculation (148) is performed as a function of the at least one first measured value (p1, T1), in particular a first pressure (p1), and an adaptation value (delta_p_off), in particular by subtraction. Hydrogen tank system (100) for detecting at least one sensor drift (delta_p) of a first sensor (10) in the hydrogen tank system (100), the hydrogen tank system (100) comprising: - at least one first sensor (10) for measuring (120) at least one first measured value (p1, T1), for example a first pressure (p1) specific to the hydrogen tank system (100), - a filling nozzle (50) for filling the hydrogen tank system (100) with hydrogen, wherein the filling nozzle (50) is connectable to a filling device (250) of a filling station (200) for filling, wherein the hydrogen tank system (100) is configured to implement the method according to one of the preceding claims. Computer program product, comprising instructions which, when executed by a computer, cause the computer to perform the procedure according to any of the preceding Claims 1 until 9 to implement. A computer-readable data carrier in which instructions are stored which, when executed by a computer, cause it to carry out the procedure according to one of the preceding Claims 1 until 9 to carry out. Control unit (HSCU), comprising an arithmetic unit (CU) and/or a storage unit (MU) in which instructions are stored which, when at least partially executed by the arithmetic unit (CU), perform a procedure according to one of the preceding Claims 1 until 9 carry out. Vehicle (300) comprising a control unit (HSCU) according to the preceding claim and/or a hydrogen tank system (100) according to Claim 10 .