A method, device, equipment, vehicle computer and vehicle for calculating hydrogen storage system capacity

Abstract

The present invention relates to the field of fuel cell technology, and discloses a method, device, equipment, vehicle machine and vehicle for calculating the capacity of a hydrogen storage system, wherein the method comprises: calculating a correction value of the hydrogen refueling capacity of the hydrogen storage system under different hydrogen refueling conditions. The hydrogen storage capacity correction value is used to compensate and correct the first hydrogen storage capacity under the target hydrogen refueling condition to obtain a second hydrogen storage capacity. The third hydrogen storage capacity of the hydrogen storage system during real-time operation and the fourth hydrogen storage capacity when the current pressure of the hydrogen storage system is lower than the unavailable pressure are calculated. The SOC value of the hydrogen storage system is calculated based on the second hydrogen storage capacity, the third hydrogen storage capacity and the fourth hydrogen storage capacity. The present invention can improve the calculation accuracy of the SOC value of the hydrogen storage system, and the calculated SOC value of the hydrogen storage system is more accurate, thereby improving the performance and user experience of hydrogen fuel vehicles.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell technology, and more specifically, to a method, device, equipment, vehicle computer, and vehicle for calculating the capacity of a hydrogen storage system. Background Art

[0002] With the development and commercialization of the hydrogen energy industry, hydrogen fuel cell vehicles are becoming a primary means of transportation. Hydrogen fuel cell vehicles primarily rely on hydrogen storage systems, and the capacity of these systems directly impacts the vehicle's range. A hydrogen storage system is a set of equipment used to store and transport hydrogen, with the hydrogen storage vessel being the most critical component. Commonly used automotive hydrogen storage vessels have a maximum pressure of 35 MPa. At this extremely high pressure, the ideal gas equation no longer applies.

[0003] A self-calibration method for hydrogen storage capacity in hydrogen storage containers currently exists. This method uses a temperature- and pressure-fitted compression factor to calculate the mass of each container separately, summing the values ​​as the numerator. Using a fixed system capacity as the denominator, the system's State of Charge (SOC) is used to correct the remaining hydrogen. The SOC is the ratio of the remaining available hydrogen in the system to the available hydrogen when fully loaded. However, during hydrogen refueling, the temperature inside the container rises dramatically, resulting in varying temperatures within each container. Heat transfer from the container to the container walls occurs through convection, and then dissipates to the outside environment through conduction and convection. This results in lower gas temperatures near the container walls, leading to inaccurate temperature measurements. After refueling, when the container cools to room temperature, the internal temperature drops, causing the SOC to fall below 100%, or even below 90%. Furthermore, the gas container has an unusable pressure below which it cannot deliver sufficient power. This pressure represents the unusable capacity.

[0004] Therefore, the SOC value of the gas storage system calculated by the above method may have the problems of low precision and inaccuracy. Summary of the Invention

[0005] In order to overcome the defects of low and inaccurate calculation of SOC value of gas storage system in the prior art, the present invention proposes the following technical solutions:

[0006] In a first aspect, the present invention provides a method for calculating the capacity of a hydrogen storage system, comprising:

[0007] First operating condition data of the hydrogen storage system under different hydrogenation operating conditions are obtained, and based on the first operating condition data, a hydrogenation capacity correction value of the hydrogen storage system under the different hydrogenation operating conditions is calculated.

[0008] Second operating condition data of the hydrogen storage system when it is fully filled with hydrogen under the target hydrogenation operating condition is obtained, and a first hydrogen storage capacity of the hydrogen storage system under the target hydrogenation operating condition is calculated based on the second operating condition data.

[0009] The first hydrogen storage capacity is compensated and corrected using the hydrogen storage capacity correction value to obtain a second hydrogen storage capacity.

[0010] The third operating condition data of the hydrogen storage system in real-time operation is obtained, and a third hydrogen storage capacity of the hydrogen storage system in real-time operation is calculated based on the third operating condition data.

[0011] An unusable pressure of the hydrogen storage system under the target hydrogenation operating condition is obtained, and based on the unusable pressure, a fourth hydrogen storage capacity is calculated when a current pressure of the hydrogen storage system is lower than the unusable pressure.

[0012] An SOC value of the hydrogen storage system is calculated based on the second hydrogen storage capacity, the third hydrogen storage capacity, and the fourth hydrogen storage capacity.

[0013] In a second aspect, the present invention further provides a hydrogen storage system capacity calculation device, comprising:

[0014] The first calculation module is used to obtain first operating condition data of the hydrogen storage system under different hydrogenation conditions, and calculate the hydrogenation capacity correction value of the hydrogen storage system under different hydrogenation conditions based on the first operating condition data.

[0015] The second calculation module is used to obtain second operating condition data of the hydrogen storage system when it is fully filled with hydrogen under the target hydrogenation operating condition, and calculate the first hydrogen storage capacity of the hydrogen storage system under the target hydrogenation operating condition based on the second operating condition data.

[0016] The compensation correction module is used to compensate and correct the first hydrogen storage capacity using the hydrogen storage capacity correction value to obtain a second hydrogen storage capacity.

[0017] The third calculation module is used to obtain third operating condition data of the hydrogen storage system during real-time operation, and calculate a third hydrogen storage capacity of the hydrogen storage system during real-time operation based on the third operating condition data.

[0018] The fourth calculation module is used to obtain the unusable pressure of the hydrogen storage system under the target hydrogenation condition, and calculate the fourth hydrogen storage capacity when the current pressure of the hydrogen storage system is lower than the unusable pressure based on the unusable pressure.

[0019] The fifth calculation module is used to calculate the SOC value of the hydrogen storage system according to the second hydrogen storage capacity, the third hydrogen storage capacity and the fourth hydrogen storage capacity.

[0020] In a third aspect, the present invention further proposes a control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the operations performed by the hydrogen storage system capacity calculation method described in the first aspect are implemented.

[0021] In a fourth aspect, the present invention further proposes a vehicle computer, which includes the control device as described in the third aspect and a display module for displaying the SOC value of the hydrogen storage system, the instantaneous hydrogen consumption per 100 kilometers, and the hydrogen consumption per 100 kilometers.

[0022] In a fifth aspect, the present invention further provides a vehicle, which is equipped with the vehicle computer as described in the fourth aspect.

[0023] Compared with the existing technology, the technical solution of the present invention has the following beneficial effects: by acquiring operating data of multiple hydrogen storage systems under different hydrogenation conditions and determining the correction value of the hydrogen storage system capacity under different operating conditions, the present invention can accurately calculate the baseline value of the hydrogen storage system capacity under various operating conditions. In addition, according to actual needs, an unavailable pressure value is set under the current operating condition, and a fourth hydrogen storage capacity is calculated as the unavailable capacity. This unavailable capacity is excluded when calculating the hydrogen storage system SOC value. This can greatly improve the calculation accuracy of the hydrogen storage system SOC value, making the calculated hydrogen storage system SOC value more accurate, and improving the performance and user experience of hydrogen fuel cell vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of the method for calculating the capacity of a hydrogen storage system provided in an embodiment of the present application.

[0025] Figure 2 Schematic diagram of the relationship between pressure and time of the hydrogen storage system during the hydrogenation process in the embodiment of the present application.

[0026] Figure 3 Schematic diagram of the relationship between temperature and time during the hydrogenation process of the hydrogen storage system in the embodiment of the present application.

[0027] Figure 4 This is an architectural diagram of a hydrogen storage system capacity calculation device according to an embodiment of the present application.

[0028] Figure 5 A schematic diagram of the structure of the control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will describe embodiments of the present invention with reference to the accompanying drawings and preferred technical solutions. Those skilled in the art will readily understand other advantages and benefits of the present invention from the contents disclosed in this specification. The present invention may also be implemented or applied through different specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred technical solutions are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0030] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0031] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring the embodiments of the present invention.

[0032] Specifically, Figure 1 A flow chart of the method for calculating the capacity of a hydrogen storage system provided in an embodiment of the present application.

[0033] like Figure 1 As shown, the method for calculating the capacity of the hydrogen storage system includes the following steps:

[0034] S10: Acquire first operating condition data of the hydrogen storage system under different hydrogenation operating conditions, and calculate hydrogenation capacity correction values ​​of the hydrogen storage system under different hydrogenation operating conditions based on the first operating condition data.

[0035] It's understandable that a hydrogen storage system provides hydrogen to devices such as vehicles that use hydrogen as a power source. During the hydrogenation process, the temperature of the hydrogen storage system rises, which is affected by a variety of factors, such as ambient temperature, hydrogen pre-cooling temperature, hydrogenation method, gas source pressure, and internal pressure of the hydrogen storage system. Comprehensively considering the correlation and impact of these parameters would be extremely complex. Furthermore, fuel cell vehicles are currently primarily used in demonstration operations, and the hydrogenation operating conditions are relatively simple.

[0036] In this embodiment, data requirements are proposed for specific hydrogenation working conditions. Specifically, the ambient temperature selects ten gears between -15°C and 40°C, with one gear every 5°C. The closest lower gear is taken according to the actual ambient temperature. For example, when the actual ambient temperature is 8°C, the gear of 5°C is taken. The hydrogen pre-cooling temperature is assumed to be -10°C. The hydrogen filling method selects three-stage filling, that is, first use a 20MPa low-pressure hydrogen cylinder group to fill it to 18MPa, then use a 30MPa medium-pressure hydrogen cylinder group to fill it to 28MPa, and finally use a 40MPa high-pressure hydrogen cylinder group to fill it to 35MPa. According to these above conditions, a plurality of different first working condition data of the hydrogen storage system are obtained.

[0037] Optionally, in one embodiment of the present application, calculating the hydrogenation capacity correction value of the hydrogen storage system under different hydrogenation conditions based on the first operating condition data specifically includes:

[0038] S101: Calculating the hydrogenation capacity of the hydrogen storage system under different hydrogenation conditions based on the first operating condition data.

[0039] In this embodiment, the first operating condition data includes the mass, pressure and temperature of the hydrogen storage system before and after hydrogenation. The calculation of the hydrogenation capacity of the hydrogen storage system under different hydrogenation conditions based on the first operating condition data specifically includes:

[0040] According to the mass of the hydrogen storage system before and after hydrogenation, the first hydrogenation capacity O1 is calculated, and its expression is as follows:

[0041] O1=m2-m1

[0042] Among them, m1 is the mass of the hydrogen storage system before hydrogenation, and m2 is the mass of the hydrogen storage system after hydrogenation.

[0043] According to the pressure and temperature of the hydrogen storage system before and after hydrogenation, the second hydrogenation capacity O1 is calculated, and its expression is as follows:

[0044]

[0045] Among them, M is the molar mass of the hydrogen molecule, V is the gas volume in the hydrogen storage system, R is the universal gas constant, P1 and T1 are the pressure and temperature of the hydrogen storage system before hydrogenation, P2 and T2 are the pressure and temperature of the hydrogen storage system after hydrogenation, Z1 is the compressed hydrogen molecule under the conditions of P1 and T1, and Z2 is the fitted compressed hydrogen molecule under the conditions of P2 and T2.

[0046] In this embodiment, for a set of determined temperatures T and pressures P, the corresponding compressibility factor Z is expressed as follows:

[0047]

[0048] Among them, ai 、b i and c i They represent different constant coefficients, and the preferred values ​​are: a1 = 5.88846e-2, a2 ​​= -6.13611e-2, a3 = -2.650473e-3, a4 = 2.731125e-3, a5 = 1.802374e-3, a6 = -1.150707e-3, a7 = 0.9588528e-4, a8 = -0.1109040e -6,a9=0.1264403e-9,b1=1.325,b2=1.87,b3=2.5,b4=2.8,b5=2.938,b6=3.14,b7 =3.37, b8=3.75, b9=4, c1=1, c2=1, c3=2, c4=2, c5=2.42, c6=2.63, c7=3, c8=4, c9=5.

[0049] S102: Calculating a correction value of the hydrogenation capacity of the hydrogen storage system under different hydrogenation conditions based on the hydrogenation capacity of the hydrogen storage system under different hydrogenation conditions.

[0050] In this embodiment, in order to compensate for the deviation of the hydrogen storage system capacity calculation method of a hydrogen storage system, this embodiment uses two hydrogen storage capacity confirmation methods to determine the capacity of each hydrogenation operating condition data, and obtains the hydrogen storage capacity corresponding to each capacity determination method. Based on the hydrogenation capacity of the hydrogen storage system under different hydrogenation operating conditions, the hydrogenation capacity correction value e of the hydrogen storage system under different hydrogenation operating conditions is calculated, and its expression is as follows:

[0051]

[0052] During the specific implementation process, in order to improve the accuracy of the correction value e, repeated hydrogenation operations can be performed under the same operating conditions, data measurements can be taken, the average value of the multiple deviation values ​​obtained can be calculated, and finally the hydrogen storage capacity correction value under the target operating conditions can be determined.

[0053] S20: Acquire second operating condition data of the hydrogen storage system when it is fully filled with hydrogen under the target hydrogenation operating condition, and calculate a first hydrogen storage capacity of the hydrogen storage system under the target hydrogenation operating condition based on the second operating condition data.

[0054] Optionally, in one embodiment of the present application, the first hydrogen storage capacity E1 is calculated according to the second operating condition data, and its expression is as follows:

[0055]

[0056] Wherein, M is the molar mass of hydrogen element molecules, which is 0.002016 kg / mol; P0 is the pressure of the hydrogen storage system under the target hydrogenation conditions, V is the gas volume in the hydrogen storage system, Z0 is the compressed hydrogen molecule under the target hydrogenation conditions, R is the universal gas constant, and T0 is the temperature of the hydrogen storage system under the target hydrogenation conditions.

[0057] It is understandable that obtaining the data of the first hydrogen storage capacity of the hydrogen storage system requires satisfying two prerequisites, such as Figure 2 As shown, Figure 2 It is a schematic diagram of the relationship curve between pressure and time of the hydrogen storage system during the hydrogenation process in the embodiment of the present application. The first condition is that the internal pressure of the hydrogen storage system reaches the nominal pressure. For example, after the hydrogenation is completed, the controller receives feedback from the bottle valve of the target hydrogen storage system that the air pressure of all hydrogen storage containers is ≥35MPa, and it is considered that the first condition is met; the second condition is that the internal temperature of the hydrogen storage system reaches the calibrated temperature. For example, after the hydrogenation is completed, the controller receives feedback from the bottle valve of the target hydrogen storage system that the temperature inside the hydrogen storage container is ≥358K, and it is considered that the second condition is met. When these two conditions are met at the same time, the acquired data can be processed to obtain the first hydrogen storage capacity. In addition, the controller should also have the function of automatically correcting the first hydrogen storage capacity, that is, each time the two conditions are met, the current counting result will be set to the first hydrogen storage capacity of the target hydrogen storage system.

[0058] In addition, during the hydrogenation process, the temperature inside the hydrogen storage system bottle will continue to rise due to three reasons (the kinetic energy of the rapidly flowing hydrogen is converted into internal energy to generate heat; the rapid compression of hydrogen generates heat; and the temperature change caused by the Joule-Thompson effect). Existing technologies have devices for pre-cooling hydrogen, but even after pre-cooling, the temperature inside the bottle will still rise to a value far higher than the ambient temperature. Figure 3 As shown, Figure 3 This is a diagram showing the relationship between temperature and time during the hydrogenation process of the hydrogen storage system in the embodiment of this application. When hydrogenation is complete, the pressure P0 is 35 MPa, and T0 is greater than the ambient temperature. When the hydrogen storage system returns to ambient temperature through convection, heat transfer, and other methods, T0 decreases, and the compressed hydrogen molecules decrease as the temperature rises. This results in a decrease in pressure P0, assuming all other parameters except P0 remain unchanged. Therefore, when calculating the SOC of a hydrogen storage system using 35 MPa as a reference, the SOC will be far less than 100%, and may even reach 82%.

[0059] S30: compensating and correcting the first hydrogen storage capacity using the hydrogen storage capacity correction value to obtain a second hydrogen storage capacity.

[0060] It is understood that the hydrogen storage capacity correction value is used to adjust the parameters of the hydrogen storage system under the target operating conditions according to the ambient temperature, that is, to compensate the first hydrogen storage capacity to obtain the second hydrogen storage capacity. The second hydrogen storage capacity is the denominator for calculating the SOC of the hydrogen storage system, and its accuracy is very important. It should change accordingly with changes in the first hydrogen storage capacity.

[0061] S40: Acquire third operating condition data of the hydrogen storage system during real-time operation, and calculate a third hydrogen storage capacity of the hydrogen storage system during real-time operation based on the third operating condition data.

[0062] It is understandable that the third hydrogen storage capacity is calculated based on the third operating condition data of the target hydrogen storage system during real-time operation. It reflects the actual capacity of the hydrogen storage system and will change with the output and hydrogenation of the hydrogen storage container. Its calculation method is similar to that of the first hydrogen storage capacity E1, as shown below:

[0063]

[0064] Where E3 is the third hydrogen storage capacity, M is the molar mass of hydrogen molecules, which is 0.002016 kg / mol; P ′ is the pressure of the hydrogen storage system during real-time operation, V is the gas volume in the hydrogen storage system, and Z ′ is the compressed hydrogen molecule in real-time operation, R is the universal gas constant, T ′ is the temperature of the hydrogen storage system during real-time operation.

[0065] S50: Obtaining an unusable pressure of the hydrogen storage system under the target hydrogenation operating condition, and calculating, based on the unusable pressure, a fourth hydrogen storage capacity when a current pressure of the hydrogen storage system is lower than the unusable pressure.

[0066] It's understandable that hydrogen storage systems, unlike fuel tanks or other fuel systems, have a concept called a "breakdown pressure." This pressure is defined as the point below which the hydrogen storage system's capacity cannot be used normally. For example, current hydrogen refueling stations require a minimum hydrogen storage system pressure of 2 MPa for hydrogen fuel cell vehicles. Furthermore, some fuel cell system manufacturers require a minimum hydrogen circuit inlet pressure of 1.8 MPa. Therefore, a breakdown pressure can be determined based on the usage scenario.

[0067] S60: Calculating the SOC value of the hydrogen storage system in a target time period based on the second hydrogen storage capacity, the third hydrogen storage capacity, and the fourth hydrogen storage capacity. The target time period is any time point in the entire life cycle of the target hydrogen storage system.

[0068] In this embodiment, the expression for calculating the SOC value of the hydrogen storage system is as follows:

[0069]

[0070] Optionally, in one embodiment of the present application, the total mass flow rate of hydrogen output by the hydrogen storage system is calculated, and its expression is as follows:

[0071]

[0072] Wherein, t is the measurement time, and Q0 is the current hydrogen mass flow rate of the hydrogen storage system.

[0073] The instantaneous hydrogen consumption per 100 kilometers and the hydrogen consumption per 100 kilometers of the hydrogen storage system are calculated based on the total hydrogen mass flow rate.

[0074] It is understandable that according to the current status of the hydrogen storage system, the flow method is used to measure the hydrogen storage capacity output by the hydrogen storage system, and the instantaneous hydrogen consumption per 100 kilometers and the hydrogen consumption per 100 kilometers are accurately output to the vehicle computer, so that users can have a better grasp of the economy and endurance of the entire vehicle.

[0075] Next, a hydrogen storage system capacity calculation device proposed according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0076] Figure 4 2 is an architectural diagram of a hydrogen storage system capacity calculation device according to an embodiment of the present application.

[0077] like Figure 4 As shown, the communication device includes: a first calculation module 100 , a second calculation module 200 , a compensation and correction module 300 , a third calculation module 400 , a fourth calculation module 500 and a fifth calculation module 600 .

[0078] Among them, the first calculation module 100 is used to obtain the first operating condition data of the hydrogen storage system under different hydrogenation conditions, and calculate the hydrogenation capacity correction value of the hydrogen storage system under different hydrogenation conditions based on the first operating condition data. The second calculation module 200 is used to obtain the second operating condition data of the hydrogen storage system when it is fully filled with hydrogen under the target hydrogenation condition, and calculate the first hydrogen storage capacity of the hydrogen storage system under the target hydrogenation condition based on the second operating condition data. The compensation correction module 300 is used to compensate and correct the first hydrogen storage capacity using the hydrogen storage capacity correction value to obtain the second hydrogen storage capacity. The third calculation module 400 is used to obtain the third operating condition data of the hydrogen storage system when it is operating in real time, and calculate the third hydrogen storage capacity of the hydrogen storage system when it is operating in real time based on the third operating condition data. The fourth calculation module 500 is used to obtain the unusable pressure of the hydrogen storage system under the target hydrogenation condition, and calculate the fourth hydrogen storage capacity when the current pressure of the hydrogen storage system is lower than the unusable pressure based on the unusable pressure. The fifth calculation module 600 is used to calculate the SOC value of the hydrogen storage system according to the second hydrogen storage capacity, the third hydrogen storage capacity and the fourth hydrogen storage capacity.

[0079] It should be noted that the aforementioned explanation of the embodiment of the method for calculating the capacity of a hydrogen storage system is also applicable to the device for calculating the capacity of a hydrogen storage system of this embodiment, and will not be repeated here.

[0080] Figure 5 This is a schematic diagram of the structure of a control device 700 provided in an embodiment of the present application. The control device 700 includes: a memory 701, a processor 702, and a computer program stored in the memory 701 and executable by the processor 702. When the processor 702 executes the program, it implements the hydrogen storage system capacity calculation method provided in the above embodiment.

[0081] Furthermore, the control device 700 further includes: a communication interface 703 for communication between the memory 701 and the processor 702 .

[0082] The memory 701 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0083] If the memory 701, processor 702, and communication interface 703 are implemented independently, the communication interface 703, memory 701, and processor 702 can be connected to each other via a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0084] Optionally, in a specific implementation, if the memory 701, the processor 702 and the communication interface 703 are integrated on a chip, the memory 701, the processor 702 and the communication interface 703 can communicate with each other through an internal interface.

[0085] The processor 702 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0086] An embodiment of the present application also provides a vehicle computer, which includes the above-mentioned control device and a display module for displaying the SOC value of the hydrogen storage system, the instantaneous hydrogen consumption per 100 kilometers, and the hydrogen consumption per 100 kilometers.

[0087] An embodiment of the present application also provides a vehicle, which is equipped with the above-mentioned vehicle computer.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0089] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "N" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0090] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0091] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0092] Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above-mentioned embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0093] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A method for calculating the capacity of a hydrogen storage system, characterized in that: include: Acquiring first operating condition data of the hydrogen storage system under different hydrogenation operating conditions, and calculating a hydrogenation capacity correction value of the hydrogen storage system under the different hydrogenation operating conditions based on the first operating condition data; Obtaining second operating condition data of the hydrogen storage system when it is fully filled with hydrogen under the target hydrogenation operating condition, and calculating a first hydrogen storage capacity of the hydrogen storage system under the target hydrogenation operating condition based on the second operating condition data; Using the hydrogen storage capacity correction value to compensate for the first hydrogen storage capacity to obtain a second hydrogen storage capacity; Acquiring third operating condition data of the hydrogen storage system when it is operating in real time, and calculating a third hydrogen storage capacity of the hydrogen storage system when it is operating in real time based on the third operating condition data; Obtaining an unusable pressure of the hydrogen storage system under the target hydrogenation operating condition, and calculating, based on the unusable pressure, a fourth hydrogen storage capacity when a current pressure of the hydrogen storage system is lower than the unusable pressure; An SOC value of the hydrogen storage system is calculated based on the second hydrogen storage capacity, the third hydrogen storage capacity, and the fourth hydrogen storage capacity.

2. The method for calculating the capacity of a hydrogen storage system according to claim 1, wherein: Calculating the hydrogenation capacity correction value of the hydrogen storage system under different hydrogenation conditions based on the first operating condition data specifically includes: Calculating the hydrogenation capacity of the hydrogen storage system under different hydrogenation conditions based on the first operating condition data; According to the hydrogenation capacity of the hydrogen storage system under different hydrogenation conditions, the hydrogenation capacity correction value of the hydrogen storage system under different hydrogenation conditions is calculated.

3. The method for calculating the capacity of a hydrogen storage system according to claim 2, wherein: The first operating condition data includes the mass, pressure, and temperature of the hydrogen storage system before and after hydrogenation; and calculating the hydrogenation capacity of the hydrogen storage system under different hydrogenation conditions based on the first operating condition data specifically includes: According to the mass of the hydrogen storage system before and after hydrogenation, the first hydrogenation capacity O1 is calculated, and its expression is as follows: O1=m2-m1 Wherein, m1 is the mass of the hydrogen storage system before hydrogenation, and m2 is the mass of the hydrogen storage system after hydrogenation; According to the pressure and temperature of the hydrogen storage system before and after hydrogenation, the second hydrogenation capacity O1 is calculated, and its expression is as follows: Among them, M is the molar mass of the hydrogen molecule, V is the gas volume in the hydrogen storage system, R is the universal gas constant, P1 and T1 are the pressure and temperature of the hydrogen storage system before hydrogenation, P2 and T2 are the pressure and temperature of the hydrogen storage system after hydrogenation, Z1 is the compressed hydrogen molecule under the conditions of P1 and T1, and Z2 is the fitted compressed hydrogen molecule under the conditions of P2 and T2.

4. The method for calculating the capacity of a hydrogen storage system according to claim 3, wherein: According to the hydrogenation capacity of the hydrogen storage system under different hydrogenation conditions, the hydrogenation capacity correction value e of the hydrogen storage system under different hydrogenation conditions is calculated, and its expression is as follows:

5. The method for calculating the capacity of a hydrogen storage system according to claim 3, wherein: For a certain set of temperature T and pressure P, the corresponding compressibility factor Z is expressed as follows: Among them, a i 、b i and c i They represent different constant coefficients respectively.

6. The method for calculating the capacity of a hydrogen storage system according to claim 1, wherein: According to the second operating condition data, the first hydrogen storage capacity E1 is calculated, and its expression is as follows: Wherein, M is the molar mass of hydrogen molecules, P0 is the pressure of the hydrogen storage system under the target hydrogenation conditions, V is the gas volume in the hydrogen storage system, Z0 is the compressed hydrogen molecules under the target hydrogenation conditions, R is the universal gas constant, and T0 is the temperature of the hydrogen storage system under the target hydrogenation conditions.

7. The method for calculating the capacity of a hydrogen storage system according to claim 1, wherein: The method further includes calculating the total mass flow rate of hydrogen output by the hydrogen storage system, and the expression thereof is as follows: Where t is the measurement time, Q0 is the current hydrogen mass flow rate of the hydrogen storage system; The instantaneous hydrogen consumption per 100 kilometers and the hydrogen consumption per 100 kilometers of the hydrogen storage system are calculated based on the total hydrogen mass flow rate.

8. The method for calculating the capacity of a hydrogen storage system according to any one of claims 1 to 7, wherein: The SOC value of the hydrogen storage system is calculated according to the second hydrogen storage capacity, the third hydrogen storage capacity, and the fourth hydrogen storage capacity, and its expression is as follows:

9. A hydrogen storage system capacity calculation device, characterized in that: include: a first calculation module, configured to obtain first operating condition data of the hydrogen storage system under different hydrogenation operating conditions, and calculate a hydrogenation capacity correction value of the hydrogen storage system under the different hydrogenation operating conditions based on the first operating condition data; a second calculation module, configured to obtain second operating condition data of the hydrogen storage system when the hydrogen storage system is fully filled with hydrogen under the target hydrogenation operating condition, and calculate a first hydrogen storage capacity of the hydrogen storage system under the target hydrogenation operating condition based on the second operating condition data; a compensation correction module, configured to compensate and correct the first hydrogen storage capacity using the hydrogen storage capacity correction value to obtain a second hydrogen storage capacity; a third calculation module, configured to obtain third operating condition data of the hydrogen storage system during real-time operation, and calculate a third hydrogen storage capacity of the hydrogen storage system during real-time operation based on the third operating condition data; a fourth calculation module, configured to obtain an unusable pressure of the hydrogen storage system under a target hydrogenation operating condition, and calculate, based on the unusable pressure, a fourth hydrogen storage capacity when a current pressure of the hydrogen storage system is lower than the unusable pressure; The fifth calculation module is used to calculate the SOC value of the hydrogen storage system according to the second hydrogen storage capacity, the third hydrogen storage capacity and the fourth hydrogen storage capacity.

10. A control device, characterized in that: The control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the operations performed by the method for calculating the capacity of a hydrogen storage system as claimed in any one of claims 1 to 7 are implemented.

11. A vehicle computer, characterized in that: The vehicle computer includes the control device as claimed in claim 10 and a display module for displaying the SOC value of the hydrogen storage system, the instantaneous hydrogen consumption per 100 kilometers, and the hydrogen consumption per 100 kilometers.

12. A vehicle, characterized in that: The vehicle is equipped with the vehicle computer according to claim 11.

Images