Pressure determination method, apparatus, electronic device, and computer-readable storage medium
By obtaining the initial pulse peak pressure, flow rate, and temperature of the fuel gas, and calculating the equivalent drag coefficient, the problem of insufficient hydrogen refueling during the refueling process of fuel cell vehicles was solved, achieving accuracy and sufficiency in fuel gas refueling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA ENERGY INVESTMENT CORP LTD
- Filing Date
- 2022-04-22
- Publication Date
- 2026-05-19
AI Technical Summary
The problem of insufficient hydrogen refueling during the refueling process of fuel cell vehicles is mainly due to the difficulty of refueling stations in accurately predicting the target balance pressure of the hydrogen storage system of fuel cell vehicles, resulting in insufficient refueling.
By obtaining the initial pulse peak pressure, flow rate, and temperature of the fuel gas during refueling, the equivalent drag coefficient is determined. Combined with the peak pressure, flow rate, and temperature at the refueling cutoff, the target equilibrium pressure is calculated, providing accurate pressure guidance to avoid insufficient refueling.
It achieves accurate pressure control during the refueling process of fuel cell vehicles, ensuring sufficient fuel gas filling, and is suitable for the different gas storage system structures of different vehicles.
Smart Images
Figure CN116979100B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of fuel cells, and more particularly to a pressure determination method, apparatus, electronic device, and computer-readable storage medium. Background Technology
[0002] During the refueling process of fuel cell vehicles at hydrogen refueling stations, the resistance of the hydrogen pipeline system causes a certain deviation between the stable pressure and the instantaneous pressure, leading to insufficient hydrogen refueling. Furthermore, the pipeline structures of the onboard hydrogen storage systems vary significantly among different fuel cell vehicles, making standardization impossible. Additionally, non-communication-based refueling methods cannot effectively transmit information about the onboard hydrogen pipelines and cylinders to the refueling station in a timely manner. This makes it difficult for refueling stations to predict the target equilibrium pressure at the refueling cutoff point of the fuel cell vehicle's hydrogen storage system, easily resulting in insufficient hydrogen refueling. Summary of the Invention
[0003] The purpose of this disclosure is to provide a pressure determination method, apparatus, electronic device, and computer-readable storage medium to solve the problem of insufficient refueling caused by the difficulty in determining the target equilibrium pressure at the refueling cutoff during the refueling process of fuel cell vehicles.
[0004] To achieve the above objectives, a first aspect of this disclosure provides a stress prediction method, comprising:
[0005] The first peak pressure, first flow rate, and first temperature of the fuel gas are obtained when the pressure of the fuel gas reaches the initial pulse peak.
[0006] The first equilibrium pressure of the fuel gas is obtained when the pressure state of the fuel gas reaches an equilibrium state.
[0007] The equivalent resistance coefficient is determined based on the first peak pressure, the first flow rate, the first temperature, and the first equilibrium pressure.
[0008] Obtain the second peak pressure, second flow rate, and second temperature of the fuel gas at the time of fuel gas refueling cutoff;
[0009] The target equilibrium pressure at the time of fuel gas refueling cutoff is determined based on the second peak pressure, the second flow rate data, the second hydrogen temperature, and the equivalent drag coefficient.
[0010] Optionally, the method further includes:
[0011] After the fuel gas refueling is stopped, the current pressure of the fuel gas is obtained;
[0012] If the difference between the current pressure and the target equilibrium pressure is greater than a preset difference threshold, the fuel gas is replenished to make the difference between the current pressure and the target equilibrium pressure less than or equal to the difference threshold.
[0013] Optionally, before obtaining the second peak pressure, second flow rate, and second temperature of the fuel gas at the time of fuel gas refueling cutoff, the method further includes:
[0014] The third peak pressure, third flow rate, and third temperature of the fuel gas were obtained during leak detection at the time of fuel gas refueling.
[0015] The second equilibrium pressure is determined based on the third peak pressure, the third flow rate, the third temperature, and the equivalent resistance coefficient.
[0016] The presence of a leak is determined based on the second equilibrium pressure.
[0017] Optionally, before obtaining the first equilibrium pressure of the fuel gas when the pressure state of the fuel gas reaches an equilibrium state, the method further includes:
[0018] When the rate at which the pressure of the fuel gas decreases over time is less than or equal to a set threshold, it is determined that the pressure state has reached an equilibrium state.
[0019] Optionally, the equivalent drag coefficient is obtained through an equivalent drag coefficient calculation formula, which includes:
[0020]
[0021] Where, N c The equivalent resistance coefficient is given by the formula: P1 is the first peak pressure, P'1 is the first equilibrium pressure, F1 is the first flow rate, and T1 is the first temperature.
[0022] Optionally, the target equilibrium pressure is obtained through a target equilibrium pressure calculation formula, which includes:
[0023]
[0024] Where, N c P2 is the equivalent resistance coefficient, P'2 is the second peak pressure, P'2 is the target equilibrium pressure, F2 is the second flow rate, and T2 is the second temperature. The target equilibrium pressure is obtained through the calculation formula.
[0025] Optionally, the second equilibrium pressure is obtained by a second equilibrium pressure calculation formula, which includes:
[0026]
[0027] Where, N c The equivalent resistance coefficient is P3, the third peak pressure is P'3, the second equilibrium pressure is P'3, the third flow rate is F3, and the third temperature is T3. The second equilibrium pressure is obtained through the calculation formula.
[0028] A second aspect of this disclosure provides a pressure determining device, comprising:
[0029] The first acquisition module is used to acquire the first peak pressure, first flow rate, and first temperature of the fuel gas when the pressure of the fuel gas reaches the initial pulse peak.
[0030] The second acquisition module is used to acquire the first equilibrium pressure of the fuel gas when the pressure state of the fuel gas reaches the equilibrium state.
[0031] The coefficient determination module is used to determine the equivalent resistance coefficient based on the first peak pressure, the first flow rate, the first temperature, and the first equilibrium pressure.
[0032] The third acquisition module is used to acquire the second peak pressure, second flow rate, and second temperature of the fuel gas when the fuel gas refueling is cut off.
[0033] The pressure determination module is used to determine the target equilibrium pressure at the time of fuel gas refueling cutoff based on the second peak pressure, the second flow rate data, the second hydrogen temperature, and the equivalent drag coefficient.
[0034] A third aspect of this disclosure provides an electronic device comprising:
[0035] A memory on which computer programs are stored;
[0036] A processor for executing the computer program in the memory to implement the steps of the method of any one of the first aspects.
[0037] A fourth aspect of this disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in any of the first aspects.
[0038] In the above technical solution, the first peak pressure, first flow rate, and first temperature of the fuel gas are obtained when the pressure of the fuel gas reaches the initial pulse peak. The first equilibrium pressure of the fuel gas is obtained when the pressure state reaches equilibrium. Then, based on the first peak pressure, first flow rate, first temperature, and first equilibrium pressure, the equivalent resistance coefficient is determined. Finally, the second peak pressure, second flow rate, and second temperature of the fuel gas are obtained when fuel gas refueling is stopped. Based on the second peak pressure, second flow rate data, second hydrogen temperature, and equivalent resistance coefficient, the target equilibrium pressure at the fuel gas refueling stop is determined. Through this technical solution, the target equilibrium pressure of the fuel cell vehicle's gas storage system at the fuel gas refueling stop can be predicted, thus providing accurate pressure guidance for the fuel gas refueling process, avoiding insufficient refueling, and ensuring that the fuel gas refueled to the vehicle meets the requirements for full refueling.
[0039] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0040] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0041] Figure 1 This is a flowchart illustrating a pressure prediction method according to an exemplary embodiment of the present disclosure.
[0042] Figure 2 This is a flowchart illustrating another pressure determination method according to an exemplary embodiment of the present disclosure.
[0043] Figure 3 This is a flowchart illustrating yet another pressure determination method according to an exemplary embodiment of the present disclosure.
[0044] Figure 4 The diagram shows a pressure change curve during a fuel gas refueling process, according to an exemplary embodiment of the present disclosure.
[0045] Figure 5 This is a flowchart illustrating a fuel gas refueling process according to an exemplary embodiment of the present disclosure.
[0046] Figure 6 This is a block diagram illustrating a pressure determining device according to an exemplary embodiment.
[0047] Figure 7 This is a block diagram illustrating an electronic device according to an exemplary embodiment.
[0048] Figure 8This is a block diagram illustrating yet another electronic device according to an exemplary embodiment. Detailed Implementation
[0049] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0050] It should be noted that all actions involving the acquisition of signals, information, or data in this disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with authorization from the owner of the relevant device.
[0051] Figure 1 This is a flowchart illustrating a pressure prediction method according to an exemplary embodiment of the present disclosure, such as... Figure 1 As shown, this pressure prediction method may include the following steps:
[0052] In step S101, the first peak pressure, first flow rate, and first temperature of the fuel gas are obtained when the pressure of the fuel gas reaches the initial pulse peak.
[0053] It is understood that in the various embodiments of this disclosure, the fuel gas can be any gas that can be used as fuel for a fuel cell. A fuel cell is a power generation device that directly converts the chemical energy of fuel and oxidant into electrical energy through an electrochemical reaction. For example, in a hydrogen fuel cell, the fuel gas is hydrogen.
[0054] A typical fuel gas refueling system may include a fuel gas tank, a refueling pump, a one-way valve, and a refueling interface. The gas storage system of a fuel cell vehicle typically includes an intake valve and a gas tank (the structures of the above refueling system and the vehicle's gas storage system are exemplary and may include other devices or components). When refueling a fuel cell vehicle, the refueling interface of the refueling system is connected to the vehicle, thus creating a closed environment between the refueling system and the vehicle's gas storage system. Within this closed environment, as the refueling system inputs fuel gas into the vehicle, the fuel gas pressure changes accordingly. Therefore, it is necessary to monitor the refueling pressure to ensure the safety of the refueling process and to ensure that sufficient fuel gas is supplied to the vehicle.
[0055] In one embodiment, the flow rate of the fuel gas being dispensed can be detected using a gas flow meter. A pressure sensor can be installed near the gas flow meter (nearby can be understood as a distance less than a certain distance threshold) to detect the pressure of the fuel gas. A temperature sensor is installed on the gas pipeline near the gas flow meter to detect the temperature of the fuel gas. When the pressure sensor near the gas flow meter detects that the fuel gas pressure first reaches its peak value, the pulse formed by the pressure curve can be called the initial pulse, and the pressure value of this pulse can be called the initial pulse peak value. At this time, the pressure value currently detected by the pressure sensor is obtained as the first peak pressure, the flow rate value of the gas flow meter at this time is obtained as the first flow rate, and the current temperature value of the temperature sensor is obtained as the first temperature.
[0056] In step S102, the first equilibrium pressure of the fuel gas is obtained when the pressure state of the fuel gas reaches the equilibrium state.
[0057] It is understandable that during the fuel gas refueling process, after the fuel gas pressure reaches the first peak pressure mentioned above, the fuel gas pressure will start to decrease from the first peak pressure over time. The condition for determining that the fuel gas pressure state has reached an equilibrium state may include: if the rate of decrease of the fuel gas pressure over time is less than or equal to a set threshold, the pressure state is determined to have reached an equilibrium state.
[0058] When the rate at which the pressure of the fuel gas decreases over time is lower than a certain set threshold, it can be understood that the rate at which the pressure of the fuel gas decreases is less than a certain level and the pressure tends to stabilize. Therefore, it can be determined that the pressure state of the fuel gas has reached an equilibrium state, and the first equilibrium pressure can be obtained by acquiring the pressure value of the pressure sensor at this time.
[0059] Alternatively, in addition to the method described above of determining whether an equilibrium state has been reached by detecting the rate at which the pressure of the fuel gas decreases over time, it can also be determined based on the refueling time. For example, when the refueling time exceeds a set time length, it can be determined that the pressure state has reached an equilibrium state.
[0060] In step S103, the equivalent resistance coefficient is determined based on the first peak pressure, the first flow rate, the first temperature, and the first equilibrium pressure.
[0061] It is understandable that the equivalent drag coefficient can be calculated based on the first peak pressure, first flow rate, first temperature, and first equilibrium pressure mentioned above. The fluid drag coefficient refers to the resistance an object experiences when it is in a fluid (liquid or gas) with relative motion. The direction of the resistance is opposite to the object's velocity relative to the fluid, and its magnitude is related to the relative velocity. When fuel gas is added to a vehicle, the injected fuel gas is equivalent to the aforementioned object, and the added fuel gas, existing in the vehicle's gas pipeline, is equivalent to the aforementioned fluid, providing resistance to the injected fuel. Therefore, the drag coefficient encountered by the fuel gas during injection is called the equivalent drag coefficient. This can be understood as estimating the current equivalent drag coefficient based on the first peak pressure, first flow rate, first temperature, and first equilibrium pressure. Since the gas storage system pipeline structures of different fuel cell vehicles may vary significantly, the method of calculating the equivalent drag coefficient described above can avoid the influence of differences in gas storage system pipeline structures and is applicable to different vehicles.
[0062] In step S104, the second peak pressure, second flow rate, and second temperature of the fuel gas are obtained when the fuel gas refueling is cut off.
[0063] In step S105, the target equilibrium pressure at the fuel gas refueling cutoff is determined based on the second peak pressure, the second flow rate, the second hydrogen temperature, and the equivalent drag coefficient.
[0064] It is understood that when the fuel gas refueling is cut off, the current pressure value of the pressure sensor is obtained as the second peak pressure, the current temperature value of the temperature sensor is obtained as the second temperature, and the current flow rate of the gas flow meter is obtained as the second flow rate.
[0065] The target equilibrium pressure can be predicted by calculation based on the second peak pressure, second flow rate, second hydrogen temperature, and the equivalent drag coefficient. After obtaining the target equilibrium pressure, it is used as a reference pressure for the current vehicle to add fuel gas, and as a guide for whether the fuel gas pressure meets the standard and whether the fuel gas needs to be compensated, thereby ensuring that the fuel gas is fully added.
[0066] Optionally, Figure 2 This is a flowchart illustrating another pressure determination method according to an exemplary embodiment of the present disclosure, such as... Figure 2 As shown, the pressure determination method may further include the following steps:
[0067] In step S106, after the fuel gas refueling is stopped, the current pressure of the fuel gas is obtained.
[0068] In step S107, if the difference between the current pressure and the target equilibrium pressure is greater than a preset difference threshold, fuel gas compensation is performed so that the difference between the current pressure and the target equilibrium pressure is less than or equal to the difference threshold.
[0069] It is understandable that after the refueling is stopped and the target balance pressure is determined through step S105, the current pressure value of the pressure sensor is obtained as the current pressure. If the difference between the current pressure and the predicted target balance pressure is greater than the difference threshold, fuel gas can continue to be added to the vehicle as compensation refueling until the current pressure detected by the pressure sensor reaches the target balance pressure. The current pressure reaching the target balance pressure can be understood as the current pressure being equal to the target balance pressure, or the difference between the current pressure and the target balance pressure being less than or equal to the difference threshold.
[0070] Optionally, the process of adding fuel gas after the pressure of the fuel gas has reached equilibrium may also include a leak detection step, which refers to detecting whether there is a leak in the pipeline. Figure 3 This is a flowchart illustrating yet another pressure determination method according to an exemplary embodiment of the present disclosure, such as... Figure 3 As shown, before step S104, the following steps may also be included:
[0071] In step S108, the third peak pressure, third flow rate, and third temperature of the fuel gas are obtained during the leak detection process when the fuel gas is being refueled.
[0072] In step S109, the second equilibrium pressure is determined based on the third peak pressure, the third flow rate, the third temperature, and the equivalent resistance coefficient.
[0073] In step S110, the presence of a leak is determined based on the second equilibrium pressure.
[0074] It is understandable that a leak detection process may occur during fuel gas refueling. For example, Figure 4 The diagram shown is a schematic representation of a pressure change curve during a fuel gas refueling process according to an exemplary embodiment of the present disclosure. Figure 4 As shown, the horizontal axis represents time in seconds (S), and the vertical axis represents the pressure value detected by the pressure sensor in MPa (megapascals). This pressure change curve is the curve of pressure changing with time during the refueling process. The curve includes the first peak pressure when the initial pulse is reached, the third peak pressure when leak detection occurs during refueling, and the second peak pressure when refueling is stopped.
[0075] During leak detection at the filling stage, if the pressure is in a state of pressure equilibrium, but the pressure obtained by the pressure sensor is significantly lower than the calculated second equilibrium pressure, then the pipeline is considered to be leaking. The pressure being significantly lower than the second equilibrium pressure can be understood as the difference between the current pressure and the second equilibrium pressure exceeding a certain threshold.
[0076] Figure 5 This is a flowchart illustrating a fuel gas refueling process according to an exemplary embodiment of the present disclosure, such as... Figure 5 As shown, the method may include the following steps:
[0077] Step S501: Add fuel gas to the vehicle and monitor the pressure, flow rate and temperature of the fuel gas.
[0078] The methods for monitoring the pressure, flow rate, and temperature of fuel gas can be referred to in step S101, and will not be repeated here.
[0079] Step S502: Obtain the first peak pressure, first flow rate, and first temperature when the pressure curve reaches the initial pulse.
[0080] Step S503: Wait for pressure to equalize.
[0081] Step S504: The first equilibrium pressure of the fuel gas when the pressure equilibrium state is reached.
[0082] Step S505: Determine the equivalent resistance coefficient based on the first peak pressure, first flow rate, first temperature, and first equilibrium pressure.
[0083] Optionally, the equivalent drag coefficient can be obtained through the equivalent drag coefficient calculation formula, which includes:
[0084]
[0085] Where, N c The equivalent drag coefficient N can be obtained using this formula, where P1 is the first peak pressure, P'1 is the first equilibrium pressure, F1 is the first flow rate, and T1 is the first temperature. c .
[0086] Step S506: Obtain the third peak pressure, third flow rate, and third temperature of the fuel gas during the leak detection process in the fuel gas refueling process.
[0087] Step S507: Determine the second equilibrium pressure based on the third peak pressure, the third flow rate, the third temperature, and the equivalent resistance coefficient.
[0088] Optionally, the second equilibrium pressure can be obtained by a second equilibrium pressure calculation formula, which includes:
[0089]
[0090] Where, N c P3 is the equivalent resistance coefficient, P'3 is the third peak pressure, P'3 is the second equilibrium pressure, F3 is the third flow rate, and T3 is the third temperature. The second equilibrium pressure is obtained through this calculation formula.
[0091] Step S508: Determine whether a leak exists based on the second equilibrium pressure.
[0092] Step S509: Obtain the second peak pressure, second flow rate, and second temperature of the fuel gas when the fuel gas refueling is cut off.
[0093] Step S510: Determine the target equilibrium pressure at the fuel gas refueling cutoff based on the second peak pressure, second flow rate data, second hydrogen temperature, and equivalent drag coefficient.
[0094] Optionally, the target equilibrium pressure can be obtained through a target equilibrium pressure calculation formula, which includes:
[0095]
[0096] Where, N c P2 is the equivalent resistance coefficient, P'2 is the second peak pressure, P'2 is the target equilibrium pressure, F2 is the second flow rate, and T2 is the second temperature. The target equilibrium pressure is obtained through this calculation formula.
[0097] Step S511: After the fuel gas refueling is stopped, obtain the current pressure of the fuel gas.
[0098] Step S512: Obtain the difference between the current pressure and the target equilibrium pressure.
[0099] Step S513: If the difference between the current pressure and the target equilibrium pressure is greater than a preset difference threshold, fuel gas compensation is performed so that the difference between the current pressure and the target equilibrium pressure is less than or equal to the difference threshold.
[0100] Step S514: If the difference between the current pressure and the target equilibrium pressure is less than or equal to the difference threshold, the refueling process ends.
[0101] The above technical solution can predict the target equilibrium pressure of the fuel cell vehicle's gas storage system when the fuel gas filling is cut off, thereby providing accurate pressure guidance for the fuel gas filling process, avoiding the problem of insufficient filling, and ensuring that the fuel gas added to the vehicle meets the requirements of full filling.
[0102] Figure 6This is a block diagram illustrating a pressure determining device according to an exemplary embodiment. Figure 6 As shown, the pressure determining device 600 includes:
[0103] The first acquisition module 601 is used to acquire the first peak pressure, first flow rate, and first temperature of the fuel gas when the pressure of the fuel gas reaches the initial pulse peak.
[0104] The second acquisition module 602 is used to acquire the first equilibrium pressure of the fuel gas when the pressure state of the fuel gas reaches the equilibrium state.
[0105] The coefficient determination module 603 is used to determine the equivalent resistance coefficient based on the first peak pressure, the first flow rate, the first temperature, and the first equilibrium pressure.
[0106] The third acquisition module 604 is used to acquire the second peak pressure, second flow rate, and second temperature of the fuel gas when the fuel gas refueling is cut off.
[0107] The pressure determination module 605 is used to determine the target equilibrium pressure at the fuel gas refueling cutoff based on the second peak pressure, the second flow rate data, the second hydrogen temperature, and the equivalent drag coefficient.
[0108] Optionally, the pressure determining device 600 may further include:
[0109] The fourth acquisition module is used to acquire the current pressure of the fuel gas after the fuel gas refueling is stopped;
[0110] The compensation refueling module is used to refuel fuel gas when the difference between the current pressure and the target equilibrium pressure is greater than a preset difference threshold, so that the difference between the current pressure and the target equilibrium pressure is less than or equal to the difference threshold.
[0111] Optionally, the pressure determining device 600 may further include: a fifth acquisition module and a safety module;
[0112] The fifth acquisition module is used to acquire the third peak pressure, third flow rate, and third temperature of the fuel gas during leak detection in the fuel gas refueling process;
[0113] The determination module is used to determine the second equilibrium pressure based on the third peak pressure, the third flow rate, the third temperature, and the equivalent resistance coefficient.
[0114] A safety module is used to determine whether a leak exists based on the second balancing pressure.
[0115] Optionally, the pressure determining device 600 can also be used to: determine that the pressure state has reached the equilibrium state before the first equilibrium pressure of the fuel gas is obtained when the pressure state of the fuel gas reaches the equilibrium state, provided that the rate at which the pressure of the fuel gas decreases over time is less than or equal to a set threshold.
[0116] Optionally, the equivalent drag coefficient is obtained through an equivalent drag coefficient calculation formula, which includes:
[0117]
[0118] Where, N c The equivalent resistance coefficient is given by the formula: P1 is the first peak pressure, P'1 is the first equilibrium pressure, F1 is the first flow rate, and T1 is the first temperature.
[0119] Optionally, the target equilibrium pressure is obtained through a target equilibrium pressure calculation formula, which includes:
[0120]
[0121] Where, N c P2 is the equivalent resistance coefficient, P'2 is the second peak pressure, P'2 is the target equilibrium pressure, F2 is the second flow rate, and T2 is the second temperature. The target equilibrium pressure is calculated using the formula.
[0122] Optionally, the second equilibrium pressure is obtained through a second equilibrium pressure calculation formula, which includes:
[0123]
[0124] Where, N c P3 is the equivalent resistance coefficient, P'3 is the third peak pressure, P'3 is the second equilibrium pressure, F3 is the third flow rate, and T3 is the third temperature. The second equilibrium pressure is calculated using the formula.
[0125] The above technical solution can predict the target equilibrium pressure of the fuel cell vehicle's gas storage system when the fuel gas filling is cut off, thereby providing accurate pressure guidance for the fuel gas filling process, avoiding the problem of insufficient filling, and ensuring that the fuel gas added to the vehicle meets the requirements of full filling.
[0126] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.
[0127] In the above technical solution, the first peak pressure, first flow rate, and first temperature of the fuel gas are obtained when the pressure of the fuel gas reaches the initial pulse peak. The first equilibrium pressure of the fuel gas is obtained when the pressure state reaches equilibrium. Then, based on the first peak pressure, first flow rate, first temperature, and first equilibrium pressure, the equivalent resistance coefficient is determined. Finally, the second peak pressure, second flow rate, and second temperature of the fuel gas are obtained when fuel gas refueling is stopped. Based on the second peak pressure, second flow rate data, second hydrogen temperature, and equivalent resistance coefficient, the target equilibrium pressure at the fuel gas refueling stop is determined. Through this technical solution, the target equilibrium pressure of the fuel cell vehicle's gas storage system at the fuel gas refueling stop can be predicted, thus providing accurate pressure guidance for the fuel gas refueling process, avoiding insufficient refueling, and ensuring that the fuel gas refueled to the vehicle meets the requirements for full refueling.
[0128] Figure 7 This is a block diagram illustrating an electronic device 700 according to an exemplary embodiment. Figure 7 As shown, the electronic device 700 may include a processor 701 and a memory 702. The electronic device 700 may also include one or more of a multimedia component 703, an input / output (I / O) interface 704, and a communication component 705.
[0129] The processor 701 controls the overall operation of the electronic device 700 to complete all or part of the steps in the pressure determination method described above. The memory 702 stores various types of data to support the operation of the electronic device 700. This data may include, for example, instructions for any application or method operating on the electronic device 700, and application-related data such as contact data, sent and received messages, pictures, audio, video, etc. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The multimedia component 703 may include a screen and audio components. The screen may be, for example, a touchscreen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in memory 702 or transmitted via communication component 705. The audio component also includes at least one speaker for outputting audio signals. I / O interface 704 provides an interface between processor 701 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual or physical buttons. Communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IoT, eMTC, or other 5G technologies, or combinations thereof, is not limited here. Therefore, the corresponding communication component 705 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.
[0130] In an exemplary embodiment, the electronic device 700 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the pressure determination method described above.
[0131] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the pressure determination method described above. For example, the computer-readable storage medium may be the memory 702 including program instructions described above, which may be executed by the processor 701 of the electronic device 700 to complete the pressure determination method described above.
[0132] Figure 8 This is a block diagram illustrating an electronic device 800 according to an exemplary embodiment. For example, the electronic device 800 may be provided as a server. (Refer to...) Figure 8 The electronic device 800 includes a processor 822, which may be one or more, and a memory 832 for storing computer programs executable by the processor 822. The computer program stored in the memory 832 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processor 822 may be configured to execute the computer program to perform the aforementioned pressure determination method.
[0133] Additionally, the electronic device 800 may also include a power supply component 826 and a communication component 850. The power supply component 826 can be configured to perform power management of the electronic device 800, and the communication component 850 can be configured to enable communication of the electronic device 800, such as wired or wireless communication. Furthermore, the electronic device 800 may also include an input / output (I / O) interface 858. The electronic device 800 can operate on an operating system, such as Windows Server, stored in memory 832. TM Mac OSX TM Unix TM Linux TM etc.
[0134] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the pressure determination method described above. For example, the non-transitory computer-readable storage medium may be the memory 832 including the program instructions described above, which may be executed by the processor 822 of the electronic device 800 to complete the pressure determination method described above.
[0135] In another exemplary embodiment, a computer program product is also provided, which includes a computer program executable by a programmable device, the computer program having a code portion for performing the pressure determination method described above when executed by the programmable device.
[0136] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and all such simple modifications fall within the protection scope of this disclosure. Furthermore, it should be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction.
[0137] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. A method for determining pressure, characterized in that, The method includes: The first peak pressure, first flow rate, and first temperature of the fuel gas are obtained when the pressure of the fuel gas reaches the initial pulse peak. The first equilibrium pressure of the fuel gas is obtained when the pressure state of the fuel gas reaches an equilibrium state. The equivalent resistance coefficient is determined based on the first peak pressure, the first flow rate, the first temperature, and the first equilibrium pressure. Obtain the second peak pressure, second flow rate, and second temperature of the fuel gas at the time of fuel gas refueling cutoff; The target equilibrium pressure at the time of fuel gas refueling cutoff is determined based on the second peak pressure, the second flow rate, the second temperature, and the equivalent resistance coefficient.
2. The method according to claim 1, characterized in that, The method further includes: After the fuel gas refueling is stopped, the current pressure of the fuel gas is obtained; If the difference between the current pressure and the target equilibrium pressure is greater than a preset difference threshold, the fuel gas is replenished to make the difference between the current pressure and the target equilibrium pressure less than or equal to the difference threshold.
3. The method according to claim 1, characterized in that, Before obtaining the second peak pressure, second flow rate, and second temperature of the fuel gas at the time of fuel gas refueling cutoff, the method further includes: The third peak pressure, third flow rate, and third temperature of the fuel gas were obtained during leak detection at the time of fuel gas refueling. The second equilibrium pressure is determined based on the third peak pressure, the third flow rate, the third temperature, and the equivalent resistance coefficient. The presence of a leak is determined based on the second equilibrium pressure.
4. The method according to claim 1, characterized in that, Before obtaining the first equilibrium pressure of the fuel gas when the pressure state of the fuel gas reaches equilibrium, the method further includes: When the rate at which the pressure of the fuel gas decreases over time is less than or equal to a set threshold, it is determined that the pressure state has reached an equilibrium state.
5. The method according to claim 1, characterized in that, The equivalent drag coefficient is obtained through the equivalent drag coefficient calculation formula, which includes: in, The equivalent drag coefficient is... This is the first peak pressure. For the first equilibrium pressure, For the first flow rate, The first temperature is used to calculate the equivalent drag coefficient using the aforementioned formula.
6. The method according to claim 1, characterized in that, The target equilibrium pressure is obtained through a target equilibrium pressure calculation formula, which includes: in, The equivalent drag coefficient is... This is the second peak pressure. To balance the target pressure, For the second flow rate, The second temperature is used to calculate the target equilibrium pressure using the aforementioned formula.
7. The method according to claim 3, characterized in that, The second equilibrium pressure is obtained through a second equilibrium pressure calculation formula, which includes: in, The equivalent drag coefficient is... The third peak pressure, This is the second equilibrium pressure. For the third flow, The third temperature is used to obtain the second equilibrium pressure using the calculation formula.
8. A pressure determining device, characterized in that, The device includes: The first acquisition module is used to acquire the first peak pressure, first flow rate, and first temperature of the fuel gas when the pressure of the fuel gas reaches the initial pulse peak. The second acquisition module is used to acquire the first equilibrium pressure of the fuel gas when the pressure state of the fuel gas reaches the equilibrium state. The coefficient determination module is used to determine the equivalent resistance coefficient based on the first peak pressure, the first flow rate, the first temperature, and the first equilibrium pressure. The third acquisition module is used to acquire the second peak pressure, second flow rate, and second temperature of the fuel gas when the fuel gas refueling is cut off. The pressure determination module is used to determine the target equilibrium pressure at the time of fuel gas refueling cutoff based on the second peak pressure, the second flow rate, the second temperature, and the equivalent resistance coefficient.
9. An electronic device, characterized in that, include: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1-7.
10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by a processor, it implements the steps of the method according to any one of claims 1-7.