Methods and related equipment for determining the real-time temperature inside the vehicle-mounted gas cylinder during refueling.

Abstract

This invention provides a method and related equipment for determining the real-time temperature inside a vehicle-mounted gas cylinder during refueling. The method includes: determining initial state parameters inside the vehicle-mounted gas cylinder based on sensor parameters within the refueling machine during refueling initialization; collecting real-time state parameters within the refueling machine during refueling; and determining the real-time temperature inside the vehicle-mounted gas cylinder during refueling based on the initial state parameters and the real-time state parameters. This invention utilizes parameters sensed by a sensor system installed in the refueling machine to simulate and infer the real-time temperature inside the vehicle-mounted gas cylinder, providing a reference for determining whether the gas cylinder is overheating and ensuring refueling safety even with increased refueling rates.

Description

Technical Field

[0001] This invention relates to the field of hydrogen refueling device technology, and in particular to a method and system for determining the real-time temperature inside the on-board gas cylinder during refueling, a method for controlling the refueling speed of the refueling machine during refueling, and a readable storage medium. Background Technology

[0002] To address the problems caused by the energy crisis and environmental pollution, hydrogen-powered fuel cell vehicles have developed and become industrialized rapidly, and countries around the world attach great importance to the construction of hydrogen refueling stations.

[0003] Most hydrogen refueling stations currently under construction or already in operation are designed with a hydrogen refueling capacity of 35MPa or 70MPa. According to GB / T 31138-2022, hydrogen refueling machines can be equipped with a standard communication interface for data exchange with the vehicle, allowing the pressure and temperature signals from the vehicle's gas cylinders to be input to the refueling machine during the refueling process, preventing overpressure and overtemperature issues. A pre-cooling system can also be installed in the hydrogen supply system.

[0004] To reduce waiting time and achieve rapid refueling at hydrogen refueling stations, storage tanks are typically installed to store high-pressure hydrogen compressed by the compressor. These tanks are directly connected to the refueling machine and are level with the vehicle's onboard gas cylinder. During refueling, the faster the refueling speed, the faster the hydrogen's kinetic energy is converted into internal energy after being added to the onboard cylinder, leading to a rapid temperature rise. If the temperature inside the onboard hydrogen storage cylinder exceeds the 85°C failure temperature of the outer carbon fiber layer, there is a risk of rupture. Therefore, a throttling valve is installed in the refueling machine to reduce the hydrogen flow rate. Experiments have shown that the maximum flow rate does not exceed 60 g / s. The throttling valve and other valves in the refueling machine generate heat during the throttling process due to the scorch effect. Therefore, a hydrogen cooler is needed to reduce the temperature rise caused by the scorch effect and to lower the temperature of the hydrogen inside the storage tank due to heat conduction from the external environment.

[0005] Currently, most hydrogen refueling stations and hydrogen fuel cell vehicles in China do not have station-vehicle communication devices on their onboard gas cylinders, or when communication is interrupted due to malfunctions or other reasons, hydrogen can only be refueled at a conservative filling speed to ensure that overheating does not occur during the refueling process. This not only slows down the hydrogen refueling speed but also increases the waiting time, affecting the promotion and application of hydrogen fuel cell vehicles.

[0006] In view of this, the present invention is hereby proposed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome at least some of the shortcomings of the prior art and provide a method for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process. The method determines the initial state parameters inside the vehicle-mounted gas cylinder based on the sensor parameters inside the refueling machine during the refueling initialization process, and collects the real-time state parameters inside the refueling machine during the refueling process. Then, the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process is determined based on the initial state parameters and the real-time state parameters, providing a reference for judging whether the vehicle-mounted gas cylinder is overheating and ensuring the safety of refueling when the refueling rate is increased.

[0008] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0009] A method for determining the real-time temperature inside a vehicle-mounted gas cylinder during refueling, comprising:

[0010] The initial state parameters inside the vehicle-mounted gas cylinder are determined based on the sensor parameters inside the refueling machine during the refueling initialization process.

[0011] During the dispensing process, real-time status parameters within the dispensing machine are collected; and

[0012] The real-time temperature inside the vehicle-mounted gas cylinder during the refueling process is determined based on the initial state parameters and the real-time state parameters.

[0013] In some implementations, the initial state parameters include the cylinder volume and initial gas volume of the vehicle-mounted gas cylinder;

[0014] The steps for determining the initial state parameters of the vehicle-mounted gas cylinder based on sensor parameters within the refueling machine during the refueling initialization process include:

[0015] Based on the sensor parameters inside the filling machine during the filling initialization process, the mass change and pressure change of the vehicle-mounted gas cylinder from the first time point to the second time point are determined;

[0016] Obtain the ambient temperature of the environment in which the dispensing machine is located;

[0017] The cylinder volume and the initial gas volume are determined based on the mass change, the pressure change, and the ambient temperature.

[0018] In some implementations, the time interval between the first time node and the second time node is in the range of 3s to 5s.

[0019] In some implementations, the real-time status parameters include the real-time pressure and real-time mass flow rate of the dispensing machine.

[0020] In some embodiments, the step of determining the real-time temperature inside the vehicle-mounted gas cylinder during refueling based on the initial state parameters and the real-time state parameters includes:

[0021] The real-time temperature inside the vehicle-mounted gas cylinder is determined based on the following formula:

[0022]

[0023] Where T is the time node t i The real-time temperature inside the vehicle-mounted gas cylinder is given by t, M is the molar mass of the gas being dispensed, P is the real-time pressure of the dispensing machine, V is the volume of the gas cylinder inside the vehicle-mounted gas cylinder, and R is the value at time node t. i-1 The gas constant at the temperature inside the vehicle-mounted gas cylinder is given by Δm, where Δm is the real-time mass flow rate of the filling machine, and m0 is the initial gas volume inside the vehicle-mounted gas cylinder.

[0024] The present invention also provides a method for controlling the dispensing speed of a dispensing machine during the dispensing process, comprising:

[0025] The real-time temperature inside the vehicle-mounted gas cylinder is determined according to the above-mentioned method for determining the real-time temperature inside the gas cylinder during the refueling process.

[0026] The filling speed of the filling machine is controlled according to the real-time temperature inside the vehicle-mounted gas cylinder.

[0027] In some embodiments, the step of controlling the dispensing speed of the dispensing machine based on the real-time temperature inside the vehicle-mounted gas cylinder includes:

[0028] When it is determined that the real-time temperature inside the vehicle-mounted gas cylinder exceeds a first temperature threshold, the filling speed of the filling machine is reduced.

[0029] When the real-time temperature inside the vehicle-mounted gas cylinder is determined to exceed the second temperature threshold, the filling machine is controlled to stop filling.

[0030] This invention also provides a system for determining the real-time temperature inside a vehicle-mounted gas cylinder during refueling, comprising:

[0031] The sensor system is used to sense the sensor parameters inside the dispensing machine during the dispensing initialization process and the real-time status parameters inside the dispensing machine during the dispensing process;

[0032] The determining unit is communicatively connected to the sensor system and is used to receive sensor parameters inside the refueling machine during the refueling initialization process and real-time status parameters inside the refueling machine during the refueling process. It is also capable of executing the method for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process as described above.

[0033] In some embodiments, the sensor system includes a mass flow meter, a pressure transmitter, and an ambient temperature sensor disposed in the dispensing machine.

[0034] The present invention also provides a readable storage medium, characterized in that the readable storage medium stores a computer program, which, when executed by a processor, implements the method for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process as described above.

[0035] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0036] The present invention provides a method for determining the real-time temperature inside a vehicle-mounted gas cylinder during refueling. This method determines the initial state parameters inside the gas cylinder based on sensor parameters inside the refueling machine during the refueling initialization process, collects real-time state parameters inside the refueling machine during the refueling process, and then determines the real-time temperature inside the gas cylinder during the refueling process based on the initial state parameters and the real-time state parameters. This provides a reference for judging whether the gas cylinder is overheating and ensures refueling safety while increasing the refueling rate. Attached Figure Description

[0037] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0038] Figure 1 This is the architecture of a system for determining the real-time temperature inside a vehicle-mounted gas cylinder during the refueling process, as provided by an exemplary embodiment of the present invention.

[0039] Figure 2 This is a schematic diagram of a liquid hydrogen refueling system provided according to an exemplary embodiment of the present invention;

[0040] Figure 3 This is a flowchart illustrating a method for determining the real-time temperature inside a vehicle-mounted gas cylinder during the refueling process, provided by an exemplary embodiment of the present invention.

[0041] Figure 4 This is a flowchart illustrating step S310 provided according to an exemplary embodiment of the present invention;

[0042] Figure 5 This is a flowchart illustrating a method for controlling the dispensing speed of a dispensing machine during the dispensing process, provided by an exemplary embodiment of the present invention.

[0043] Figure 6 This is a schematic diagram of the structure of an electronic device provided according to an exemplary embodiment of the present invention.

[0044] In the diagram: 100, Architecture; 110, Determining Unit; 120, Sensor System;

[0045] 200. Liquid hydrogen refueling system; 210. Hydrogen refueling pipeline; 211. Hydrogen supply pneumatic valve; 220. Refueling machine; 221. Hydrogen refueling machine inlet regulating valve; 222. Ambient temperature sensor; 223. Mass flow meter; 224. Discharge pneumatic valve; 225. Hydrogen precooling device; 226. Pressure transmitter; 227. Hydrogen temperature sensor; 228. Hydrogen refueling hose; 229. Hydrogen refueling nozzle; 230. Vehicle-mounted gas cylinder;

[0046] 600. Electronic device; 601. Processor; 602. Memory; 603. Bus; 604. Communication interface.

[0047] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0049] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] As described in the background section, determining the temperature inside the onboard gas cylinder using the refueling system when station-vehicle communication is unavailable or interrupted due to malfunctions is crucial for improving refueling speed and ensuring refueling safety. To address this issue, an exemplary embodiment of the present invention provides a method for determining the real-time temperature inside the onboard gas cylinder during refueling. This method includes determining initial state parameters inside the onboard gas cylinder based on sensor parameters within the refueling machine during refueling initialization; collecting real-time state parameters within the refueling machine during refueling; and determining the real-time temperature inside the onboard gas cylinder during refueling based on the initial state parameters and the real-time state parameters. In this solution, the real-time temperature inside the onboard gas cylinder is simulated and inferred using parameters sensed by the sensor system installed in the refueling machine, providing a reference for determining whether the onboard gas cylinder is overheating and ensuring refueling safety while increasing the refueling rate.

[0052] Figure 1 An architecture 100 is shown for a determination system suitable for implementing a method for determining the real-time temperature inside a vehicle-mounted gas cylinder during refueling, according to an exemplary embodiment of the present invention.

[0053] like Figure 1 As shown, architecture 100 includes a determination unit 110 and a sensor system 120. The sensor system 120 is used to sense sensor parameters within the refueling machine during the refueling initialization process and real-time status parameters within the refueling machine during the refueling process. The determination unit 110 is communicatively connected to the sensor system 120 and is used to receive the sensor parameters within the refueling machine during the refueling initialization process and the real-time status parameters within the refueling machine during the refueling process. It is also capable of executing a method for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process, thereby determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process.

[0054] It should be noted that the gas filled in the vehicle-mounted gas cylinder can be hydrogen, LNG, etc. The following content will use hydrogen as an example to introduce the process.

[0055] Figure 2 A schematic diagram of a liquid hydrogen refueling system 200 provided according to an exemplary embodiment of the present invention is shown.

[0056] like Figure 2As shown, the liquid hydrogen refueling system 200 includes a hydrogen refueling pipeline 210, one end of which is connected to a hydrogen storage system (not shown), and the other end is connected to a refueling machine 220. A hydrogen supply pneumatic valve 211 is installed on the hydrogen refueling pipeline 210 to control its opening and closing. The refueling machine 220 includes, in sequence, a hydrogen refueling machine inlet regulating valve 221, a mass flow meter 223, a hydrogen precooling device 225, a pressure transmitter 226, and a hydrogen refueling nozzle 229. The hydrogen refueling nozzle 229 is connected to the hydrogen refueling pipeline 210 via a hydrogen refueling hose 228. The hydrogen refueling machine inlet regulating valve 221 is connected to the control unit (not shown) of the refueling machine 220. The control unit sends control commands to the hydrogen refueling machine inlet regulating valve 221 to adjust the refueling speed of the liquid hydrogen refueling system 200. The refueling machine 220 also includes an ambient temperature sensor 222 for detecting the ambient temperature of the environment in which the refueling machine is located. The control unit is communicatively connected to the aforementioned determining unit 110 and is able to receive the real-time temperature inside the vehicle-mounted gas cylinder 230 during the refueling process.

[0057] In addition, the dispensing machine 220 also includes a hydrogen temperature sensor 227 for detecting the hydrogen temperature in the hydrogen refueling line 210. The control unit can adjust the precooling capacity of the hydrogen precooling device 225 according to the hydrogen temperature.

[0058] It is understandable that the aforementioned ambient temperature sensor 222, mass flow meter 223, and pressure transmitter 226 constitute the sensor system 120 in architecture 100.

[0059] In some embodiments, the hydrogenation line 210 is also connected to an exhaust line, on which an exhaust pneumatic valve 224 is installed.

[0060] It should be noted that the aforementioned determining unit 110 can be the control system configured on the refueling machine 220 itself, or it can be the cloud server of the hydrogen refueling station. This invention does not impose any restrictions here.

[0061] Figure 3 A flowchart illustrating a method 300 for determining the real-time temperature inside a vehicle-mounted gas cylinder 230 during refueling, provided by an exemplary embodiment of the present invention, is shown.

[0062] like Figure 3 As shown, the method 300 for determining the real-time temperature inside the vehicle-mounted gas cylinder 230 during the refueling process includes the following steps:

[0063] S310. Determine the initial state parameters of the vehicle-mounted gas cylinder based on the sensor parameters inside the refueling machine during the refueling initialization process;

[0064] S320. Collect real-time status parameters within the dispensing machine during the dispensing process; and

[0065] S330. Determine the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process based on the initial state parameters and the real-time state parameters.

[0066] It should be understood that the steps shown in the method 300 for determining the real-time temperature inside the vehicle-mounted gas cylinder 230 during refueling are not exclusive. The method 300 may also include additional steps not shown and / or the steps shown may be omitted. The scope of the invention is not limited in this respect. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other. In addition, unless explicitly defined or contradicted by the context, the specific steps included in the method described in the present invention are not limited to the order described, but can be performed in any order or in parallel. Refer below to Figures 1 to 3 Describe steps S310 to S330 in detail.

[0067] Before describing steps S310 to S330 in detail, the relevant assumptions made in this invention will be introduced first.

[0068] First, assuming that the opening pressure of the one-way valve in front of the vehicle-mounted gas cylinder 230 can be ignored, that is, the pressure indicated by the pressure transmitter 226 in the filling machine 220 during the initial filling process and the actual filling process can approximately show the gas pressure in the vehicle-mounted gas cylinder 230.

[0069] Second, it is assumed that during the initialization process of refueling, the gas temperature inside the vehicle-mounted gas cylinder 230 is the same as the ambient temperature. That is, during the initialization process of refueling, the ambient temperature sensor 222 inside the refueling machine 220 can approximately show the gas temperature inside the vehicle-mounted gas cylinder 230.

[0070] It should be noted that the aforementioned refueling initialization process refers to the initial pressure and initial leak detection process performed after the hydrogen refueling nozzle 229 is inserted into the refueling port of the vehicle-mounted gas cylinder 230. As an example, depending on different operating conditions, the duration of this process is approximately 10 to 15 seconds.

[0071] S310

[0072] The initial state parameters include the cylinder volume and initial gas volume of the vehicle-mounted gas cylinder 230.

[0073] like Figure 4 As shown, step S310, which determines the initial state parameters of the vehicle-mounted gas cylinder 230 based on the sensor parameters within the filling machine 220 during the filling initialization process, includes:

[0074] S311. Based on the sensor parameters inside the refueling machine during the refueling initialization process, determine the mass change and pressure change of the vehicle-mounted gas cylinder from the first time node to the second time node;

[0075] S312. Obtain the ambient temperature of the environment where the dispensing machine is located;

[0076] S313. Determine the cylinder volume and the initial gas volume based on the mass change, the pressure change, and the ambient temperature.

[0077] Specifically, in step S311, at the first time node t1 after the start of the refueling initialization process, the mass flow rate m1 at the current moment is recorded using the mass flow meter 223 inside the refueling machine 220, and the gas pressure P1 at the current moment is recorded using the pressure transmitter 226 inside the refueling machine 220. At the second time node t2 after the start of the refueling initialization process, the mass flow rate m2 at the current moment is recorded using the mass flow meter 223 inside the refueling machine 220, and the gas pressure P2 at the current moment is recorded using the pressure transmitter 226 inside the refueling machine 220. This allows the determination of the mass change m2-m1 and the pressure change P2-P1 within the vehicle-mounted gas cylinder 230 from the first time node to the second time node. Optionally, the time interval between the first time node and the second time node is in the range of 3s to 5s.

[0078] In step S312, the ambient temperature sensor 222 installed on the refueling machine 220 can be used to record the gas temperature inside the vehicle-mounted gas cylinder 230 at the first time node t1 and the second time node t2. Since the refueling initialization process is short, according to the second assumption mentioned above, the gas temperature inside the vehicle-mounted gas cylinder 230 at both the first time node t1 and the second time node t2 can be recorded as the ambient temperature T. e .

[0079] In step S313, according to the ideal gas law PM=ρRT, the gas in the on-board gas cylinder 230 at the first time node t1 satisfies the following formula ①:

[0080]

[0081] At the second time point t2, the gas in the on-board gas cylinder 230 satisfies the following formula ②:

[0082]

[0083] Based on formulas ① and ② above, the volume of the vehicle-mounted gas cylinder 230 can be determined, as shown in formula ③:

[0084]

[0085] Wherein, V is the volume of the gas cylinder inside the vehicle-mounted gas cylinder 230, m2-m1 is the mass change from the first time node t1 to the second time node t2, P2-P1 is the pressure change from the first time node t1 to the second time node t2, and T... e R is the ambient temperature, and T is the ambient temperature. e The gas constant is given by M, where M is the molar mass of the gas being injected.

[0086] Furthermore, based on the ideal gas law PM = ρRT, the gas density ρ1 inside the onboard gas cylinder 230 at the first time node t1 can also be determined, as shown in formula ④:

[0087]

[0088] Therefore, the initial gas volume in the vehicle-mounted gas cylinder 230 can be obtained according to the following formula ⑤:

[0089] m0=ρ1×V ⑤

[0090] Where m0 is the initial gas volume in the vehicle-mounted gas cylinder 230, ρ1 is the gas density in the vehicle-mounted gas cylinder 230 at the first time node t1, and V is the gas cylinder volume of the vehicle-mounted gas cylinder 230.

[0091] The determined cylinder volume and initial gas volume of the vehicle-mounted gas cylinder 230 are stored in the determination unit 110 for use in subsequent steps when determining the real-time temperature inside the vehicle-mounted gas cylinder 230 during the filling process.

[0092] S320

[0093] In step S320, during the gas filling process, the real-time gas volume Δm injected into the vehicle-mounted gas cylinder 230 is obtained by using the real-time mass flow rate sensed by the mass flow meter 223 on the filling machine 220, which gives the real-time gas volume m = m0 + Δm in the vehicle-mounted gas cylinder 230. The real-time gas pressure P in the vehicle-mounted gas cylinder 230 is obtained by using the real-time pressure sensed by the pressure transmitter 226 on the filling machine 220.

[0094] S330

[0095] In step S330, the step of determining the real-time temperature inside the vehicle-mounted gas cylinder 230 during the refueling process based on the initial state parameters and the real-time state parameters includes:

[0096] The real-time temperature inside the vehicle-mounted gas cylinder 230 is determined based on the following formula ⑥:

[0097]

[0098] Among them, T i Let t be the time point during the refueling process.i The real-time temperature inside the vehicle-mounted gas cylinder 230, M is the molar mass of the gas being dispensed, P is the real-time pressure of the dispensing machine 220, which can be obtained from the pressure transmitter 226 on the dispensing machine 220, V is the gas cylinder volume inside the vehicle-mounted gas cylinder 230, which can be retrieved from the data determined by the determining unit 110 in step S310, and R is the time node t during the dispensing process. i-1 The gas constant at the temperature inside the vehicle-mounted gas cylinder 230 is Δm, which is the real-time mass flow rate of the filling machine 220 and can be obtained by the mass flow meter 223 on the filling machine 220. The initial gas volume inside the vehicle-mounted gas cylinder 230 can be retrieved from the data determined by the determining unit 110 in step S310.

[0099] The determination unit 110 can upload the temperature curve inside the vehicle-mounted gas cylinder 230 to the central control system of the hydrogen refueling station in real time for display and storage, so that staff can keep abreast of the safety situation during the hydrogen refueling process.

[0100] It should be noted that although the real-time temperature inside the vehicle-mounted gas cylinder 230 cannot be accurately reflected by the parameters sensed by the sensors set in the filling machine 220, it is not necessary to know the exact temperature inside the vehicle-mounted gas cylinder 230 during the filling process. Instead, it is only necessary to judge its trend and ensure that it does not exceed the upper limit. Although the simulation results have errors, safety can be ensured by reducing the judgment conditions. This method is perfectly adequate for use.

[0101] Furthermore, it can also solve many problems that make it impossible to assess the accuracy of direct measurements due to uneven temperature field distribution caused by the addition of measuring devices, slow heat transfer due to thick tank walls, and inconvenient installation of insertion measuring equipment.

[0102] Furthermore, this invention can be implemented at existing hydrogen refueling stations without requiring additional hardware configuration, simply by modifying the hydrogen refueling machine control software, thereby reducing the operating costs of hydrogen refueling stations.

[0103] Figure 5 A flowchart illustrating a method 400 for controlling the dispensing speed of a dispensing machine 220 during the dispensing process, provided by an exemplary embodiment of the present invention, is shown.

[0104] like Figure 5 As shown, the execution of the refueling speed control method 400 of the refueling machine 220 during the refueling process includes the following steps:

[0105] S410. Determine the real-time temperature inside the vehicle-mounted gas cylinder according to method 300 for determining the real-time temperature inside the gas cylinder during the refueling process.

[0106] S420: Control the filling speed of the filling machine 220 according to the real-time temperature inside the vehicle-mounted gas cylinder.

[0107] Specifically, in step S410, the real-time temperature inside the vehicle-mounted gas cylinder 230 is simulated and inferred using parameters sensed by the sensor system 120 installed in the refueling machine 220. In step S420, based on the predicted temperature value, the hydrogen refueling machine inlet regulating valve 221 is controlled to adjust the hydrogen refueling rate of the vehicle-mounted gas cylinder 230, and the temperature of the hydrogen in the vehicle-mounted gas cylinder 230 is kept below the maximum operating temperature. For example, when it is determined that the real-time temperature inside the vehicle-mounted gas cylinder 230 exceeds a first temperature threshold, the refueling speed of the refueling machine 220 is reduced; when it is determined that the real-time temperature inside the vehicle-mounted gas cylinder 230 exceeds a second temperature threshold, the refueling machine 220 is controlled to stop refueling. The first temperature threshold is, for example, 80°C, and the second temperature threshold is, for example, 85°C.

[0108] Figure 6 The structure of an electronic device provided according to an exemplary embodiment of the present invention is shown.

[0109] like Figure 6 As shown, the electronic device 600 includes a processor 601 and a memory 602. The memory 602 is communicatively connected to the processor 601. The memory 602 stores a program executable by the processor. When the program is executed by the processor, the processor 601 can execute the aforementioned method 300 for determining the real-time temperature inside the vehicle-mounted gas cylinder 230 during the refueling process. As an example, the electronic device may be, for instance, the aforementioned determining unit 110.

[0110] Figure 6 The electronic device shown also includes a bus 603 and a communication interface 604. The processor 601, the communication interface 604, and the memory 602 are connected via the bus 603.

[0111] The memory 602 may include high-speed random access memory (RAM), or it may also include non-volatile memory 602, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 604 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc. The bus 603 may be an ISA bus, PCI bus, or EISA bus, etc. The bus 603 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 6 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus 603 or one type of bus 603.

[0112] Processor 601 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 601 or by instructions in software form. The processor 601 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor, or processor 601 can be any conventional processor. The steps of the methods disclosed in the embodiments of this invention can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software module can reside in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory 602. The processor 601 reads the information in memory 602 and, in conjunction with its hardware, completes the steps of the method described in the foregoing embodiments.

[0113] An exemplary embodiment of the present invention also provides a computer-readable storage medium storing a computer program. When the computer program is called and executed by the processor 601, the computer-executable instructions cause the processor 601 to implement the method 300 for determining the real-time temperature inside the vehicle-mounted gas cylinder 230 during the refueling process. For specific implementation details, please refer to the method embodiment, which will not be repeated here.

[0114] The computer program product of the method 300 for determining the real-time temperature inside the vehicle-mounted gas cylinder 230 during the refueling process provided in this embodiment of the invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods in the preceding method embodiments. For specific implementation, please refer to the method embodiments, which will not be repeated here.

[0115] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the above-described device and / or electronic equipment can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0116] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for determining the real-time temperature inside a vehicle-mounted gas cylinder during refueling, characterized in that, First, assuming that the opening pressure of the one-way valve in front of the vehicle-mounted gas cylinder is negligible, the pressure indicated by the pressure transmitter in the filling machine during the initial filling process and the actual filling process approximately reflects the gas pressure in the vehicle-mounted gas cylinder. Second, assume that during the initial refueling process, the gas temperature inside the vehicle-mounted gas cylinder is the same as the ambient temperature. The determination methods include: The initial state parameters of the vehicle-mounted gas cylinder are determined based on the sensor parameters inside the refueling machine during the refueling initialization process. The initial state parameters include the cylinder volume and initial gas volume of the vehicle-mounted gas cylinder. This includes: determining the mass change and pressure change of the vehicle-mounted gas cylinder from a first time point to a second time point based on the sensor parameters inside the refueling machine during the refueling initialization process; obtaining the ambient temperature of the environment where the refueling machine is located; and determining the cylinder volume and the initial gas volume based on the mass change, the pressure change, and the ambient temperature. During the dispensing process, real-time status parameters within the dispensing machine are collected; and The real-time temperature inside the vehicle-mounted gas cylinder during the refueling process is determined based on the initial state parameters and the real-time state parameters.

2. The method for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process according to claim 1, characterized in that, The time interval between the first time node and the second time node is in the range of 3s to 5s.

3. The method for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process according to claim 1, characterized in that, The real-time status parameters include the real-time pressure and real-time mass flow rate of the dispensing machine.

4. The method for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process according to claim 3, characterized in that, The steps for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process based on the initial state parameters and the real-time state parameters include: The real-time temperature inside the vehicle-mounted gas cylinder is determined based on the following formula: Where T is the time node t i The real-time temperature inside the vehicle-mounted gas cylinder, M is the molar mass of the gas being dispensed, P is the real-time pressure of the dispensing machine, V is the volume of the gas cylinder inside the vehicle-mounted gas cylinder, and R is the time node t. i-1 The gas constant at the temperature inside the vehicle-mounted gas cylinder at that time. Δm The real-time mass flow rate of the filling machine. m 0 The initial gas volume in the vehicle-mounted gas cylinder.

5. A method for controlling the dispensing speed of a dispensing machine during the dispensing process, characterized in that, include: The method for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process according to any one of claims 1 to 4 determines the real-time temperature inside the vehicle-mounted gas cylinder. The filling speed of the filling machine is controlled according to the real-time temperature inside the vehicle-mounted gas cylinder.

6. The method for controlling the filling speed of the filling machine during the filling process according to claim 5, characterized in that, The steps for controlling the filling speed of the filling machine based on the real-time temperature inside the vehicle-mounted gas cylinder include: When it is determined that the real-time temperature inside the vehicle-mounted gas cylinder exceeds a first temperature threshold, the filling speed of the filling machine is reduced. When the real-time temperature inside the vehicle-mounted gas cylinder is determined to exceed the second temperature threshold, the filling machine is controlled to stop filling.

7. A system for determining the real-time temperature inside a vehicle-mounted gas cylinder during refueling, characterized in that, include: The sensor system is used to sense the sensor parameters inside the dispensing machine during the dispensing initialization process and the real-time status parameters inside the dispensing machine during the dispensing process; The determining unit is communicatively connected to the sensor system and is used to receive sensor parameters inside the refueling machine during the refueling initialization process and real-time status parameters inside the refueling machine during the refueling process, and is capable of executing the method for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process according to any one of claims 1 to 4.

8. The system for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process according to claim 7, characterized in that, The sensor system includes a mass flow meter, a pressure transmitter, and an ambient temperature sensor installed in the filling machine.

9. A readable storage medium, characterized in that, A computer program is stored on a readable storage medium, which, when executed by a processor, implements the method for determining the real-time temperature inside the vehicle-mounted gas cylinder during the refueling process according to any one of claims 1 to 4.

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