Hydrogen refueling method, device, storage medium and electronic equipment

Abstract

The present disclosure relates to a hydrogen refueling method, device, storage medium and electronic equipment, the method comprising: in response to the hydrogen refueling device accessing the vehicle-mounted hydrogen storage bottle, obtaining the initial hydrogen storage pressure of the vehicle-mounted hydrogen storage bottle; from a plurality of hydrogen delivery levels of the hydrogen source storage bottle, selecting the level with the smallest pressure difference value as the target hydrogen delivery level of the hydrogen source storage bottle; calculating the maximum pressure difference of hydrogen refueling according to the target hydrogen delivery pressure under the target hydrogen delivery level and the initial hydrogen storage pressure; determining the target filling flow rate of the vehicle-mounted hydrogen storage bottle according to the maximum pressure difference and the preset hydrogen refueling resistance; and performing hydrogen refueling based on the target hydrogen delivery level and the target filling flow rate. Thus, different hydrogen delivery levels are used for hydrogen delivery based on different pressure differences, hydrogen refueling is performed at a large flow rate during operation, passive adjustment is used, the refueling process is simplified, and the hydrogen delivery efficiency is significantly improved.

Description

Technical Field

[0001] The present disclosure relates to the field of energy transportation, and in particular, to a hydrogen filling method, device, storage medium and electronic equipment. Background Art

[0002] Among related technologies, hydrogen energy applications are still mainly concentrated in the transportation sector, and are currently mainly used in commercial vehicles such as buses and logistics vehicles. However, in the transportation process, heavy-duty trucks and trains are more urgently in need of emission reduction. The typical characteristics of hydrogen heavy-duty trucks and hydrogen trains are large on-board hydrogen storage capacity, and the mass of hydrogen required to be refueled is also relatively large. In order to meet the hydrogen refueling needs of heavy-duty trucks and hydrogen trains, hydrogen refueling infrastructure for buses and logistics vehicles is needed, that is, hydrogen refueling station processes and 35MPa hydrogen refueling machines for buses and logistics vehicles. Since buses and logistics vehicles are generally equipped with hydrogen storage bottles with a volume of 6×140L or more, they generally need to be refueled with a hydrogen mass of more than 20kg within 10 minutes to 20 minutes. This requires a relatively large refueling mass flow rate. The maximum flow rates of the current 35MPa / 70MPa hydrogen refueling machines equipped with hydrogen refueling stations are 3.6kg / min and 7.2kg / min, respectively. Applying them to buses and logistics vehicles will slow down the refueling rate. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a hydrogen filling method, device, storage medium and electronic equipment to solve the technical problem of low hydrogen filling efficiency in the related art.

[0004] In order to achieve the above-mentioned object, a first aspect of an embodiment of the present disclosure provides a hydrogen filling method, the method comprising:

[0005] In response to the hydrogenation device being connected to the on-board hydrogen storage bottle, obtaining the initial hydrogen storage pressure of the on-board hydrogen storage bottle;

[0006] From multiple hydrogen transmission levels of the gas source hydrogen storage bottle, select the level with the smallest pressure difference as the target hydrogen transmission level of the gas source hydrogen storage bottle; the pressure difference of any hydrogen transmission level is the difference between the maximum hydrogen transmission pressure corresponding to the hydrogen transmission level and the initial hydrogen storage pressure;

[0007] Calculating a maximum pressure difference for hydrogen refueling according to the target hydrogen delivery pressure at the target hydrogen delivery level and the initial hydrogen storage pressure;

[0008] determining a target filling flow rate of the on-board hydrogen storage bottle according to the maximum pressure difference and a preset hydrogenation resistance;

[0009] Hydrogen filling is performed based on the target hydrogen delivery level and the target filling flow rate.

[0010] Optionally, the performing hydrogen filling based on the target hydrogen delivery level and the target filling flow rate includes:

[0011] Determining target on / off states of a plurality of flow rate regulating valves in a preset hydrogenation line and target resistance values ​​of resistance control resistors in the preset hydrogenation line according to the target filling flow rate;

[0012] Based on the target on / off state and the target resistance value, adjusting the preset hydrogenation route to generate a target hydrogenation route;

[0013] Hydrogen filling is performed according to the target hydrogen filling route and the target filling flow rate.

[0014] Optionally, determining target on / off states of a plurality of flow rate regulating valves in a preset hydrogenation line according to the target hydrogen transmission level includes:

[0015] When the target filling flow rate is a low-speed hydrogen transmission level, determining that the branch regulating valves among the plurality of flow rate regulating valves are closed and the main regulating valve is opened;

[0016] When the target filling flow rate is a mid-range hydrogen transmission level, determining that the branch regulating valve is turned on and the main regulating valve is turned off;

[0017] When the target filling flow rate is a high-end hydrogen transmission level, it is determined that the plurality of flow rate regulating valves are all in a conducting state.

[0018] Optionally, the method further includes:

[0019] When the target filling flow rate is less than a set flow rate threshold, obtaining the current ambient temperature of the on-board hydrogen storage tank;

[0020] If the temperature difference is less than the temperature difference threshold, the target filling flow rate is adjusted to the high-end hydrogen delivery level, wherein the temperature difference is the difference between the current ambient temperature and the maximum hydrogen filling temperature.

[0021] Optionally, determining the target filling flow rate of the on-board hydrogen storage bottle according to the maximum pressure difference and the preset hydrogenation resistance includes:

[0022] Acquiring the current ambient temperature of the vehicle-mounted hydrogen storage bottle based on the ambient temperature detection device;

[0023] Determining a flow limiting coefficient according to the maximum pressure difference and the maximum ambient temperature difference, wherein the maximum ambient temperature difference is the difference between the maximum hydrogenation temperature and the current ambient temperature;

[0024] determining an initial target filling flow rate according to the maximum pressure difference and the preset hydrogenation resistance;

[0025] The flow restriction coefficient and the initial target filling flow rate are multiplied to generate the target filling flow rate.

[0026] Optionally, the method further includes:

[0027] When the hydrogen storage pressure of the on-board hydrogen storage bottle reaches the target hydrogen transmission pressure, determining the hydrogen storage volume of the on-board hydrogen storage bottle;

[0028] If the hydrogen storage volume is greater than or equal to the preset maximum volume, stopping hydrogen filling;

[0029] If the hydrogen storage volume is less than the preset maximum volume, the first hydrogen transmission level is used as the target hydrogen transmission level, and the above steps of filling hydrogen based on the target hydrogen transmission level and the target filling flow rate are repeated according to the target hydrogen transmission pressure under the target hydrogen transmission level and the initial hydrogen storage pressure, wherein the maximum hydrogen transmission pressure of the first hydrogen transmission level is greater than the maximum hydrogen transmission pressure of the target hydrogen transmission level.

[0030] According to a second aspect of an embodiment of the present disclosure, there is provided a hydrogen filling device, the device comprising:

[0031] an acquisition module, configured to acquire an initial hydrogen storage pressure of the on-board hydrogen storage bottle in response to the hydrogen refueling device being connected to the on-board hydrogen storage bottle;

[0032] A selection module is configured to select a level with the smallest pressure difference from multiple hydrogen transmission levels of the gas source hydrogen storage bottle as the target hydrogen transmission level of the gas source hydrogen storage bottle; the pressure difference of any hydrogen transmission level is the difference between the maximum hydrogen transmission pressure corresponding to the hydrogen transmission level and the initial hydrogen storage pressure;

[0033] a first determining module, configured to calculate a maximum pressure difference for hydrogen filling according to a target hydrogen transmission pressure at the target hydrogen transmission level and the initial hydrogen storage pressure;

[0034] A second determination module is configured to determine a target filling flow rate of the on-board hydrogen storage bottle according to the maximum pressure difference and a preset hydrogenation resistance;

[0035] An execution module is configured to perform hydrogen filling based on the target hydrogen delivery level and the target filling flow rate.

[0036] Optionally, the execution module includes:

[0037] a determination submodule, configured to determine, based on the target filling flow rate, target on-off states of a plurality of flow rate regulating valves in a preset hydrogenation circuit and a target resistance value of a resistance control resistor in the preset hydrogenation circuit;

[0038] a generating submodule, configured to adjust the preset hydrogenation route based on the target on / off state and the target resistance value to generate a target hydrogenation route;

[0039] The execution submodule is configured to perform hydrogen filling according to the target hydrogen filling route and the target filling flow rate.

[0040] According to a third aspect of an embodiment of the present disclosure, a non-temporary computer-readable storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the steps of any one of the methods described in the first aspect of the present disclosure are implemented.

[0041] According to a fourth aspect of an embodiment of the present disclosure, there is provided an electronic device, including:

[0042] a memory having a computer program stored thereon;

[0043] A processor is configured to execute the computer program in the memory to perform the steps of any one of the methods described in the first aspect of the present disclosure.

[0044] Through the above technical solution, in response to the hydrogenation device being connected to the on-board hydrogen storage bottle, the initial hydrogen storage pressure of the on-board hydrogen storage bottle is obtained, and the level with the smallest pressure difference is selected from the multiple hydrogen transmission levels of the gas source hydrogen storage bottle as the target hydrogen transmission level of the gas source hydrogen storage bottle. The pressure difference of any hydrogen transmission level is the difference between the maximum hydrogen transmission pressure corresponding to the hydrogen transmission level and the initial hydrogen storage pressure. Based on the target hydrogen transmission pressure and the initial hydrogen storage pressure at the target hydrogen transmission level, the maximum pressure difference for hydrogen refueling is calculated. Based on the maximum pressure difference and the preset hydrogenation resistance, the target refueling flow rate of the on-board hydrogen storage bottle is determined, and hydrogen refueling is performed based on the target hydrogen transmission level and the target refueling flow rate. Thus, different hydrogen transmission levels are used for hydrogen transmission based on different pressure differences, and hydrogen refueling is performed at a high flow rate during operation. By using a passive adjustment method, the refueling process is simplified, and the hydrogen transmission efficiency is significantly improved.

[0045] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0047] Figure 1 The figure is a flow chart showing a hydrogen filling method according to an exemplary embodiment.

[0048] Figure 2 is a schematic diagram of a high-flow hydrogen filling machine according to an exemplary embodiment.

[0049] Figure 3 The figure is a block diagram of a hydrogen filling device according to an exemplary embodiment.

[0050] Figure 4 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0051] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0052] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the corresponding data protection laws and policies of the country where they are located and with the authorization given by the owner of the corresponding device.

[0053] Figure 1 is a flow chart showing a hydrogen filling method according to an exemplary embodiment. Figure 1 As shown, the method is applied to hydrogen filling equipment and includes the following steps.

[0054] Step S11: in response to the hydrogen refueling device being connected to the on-board hydrogen storage bottle, obtaining the initial hydrogen storage pressure of the on-board hydrogen storage bottle.

[0055] It is worth mentioning that this embodiment is applied to hydrogen filling equipment, which can be a hydrogen filling machine. The hydrogen filling machine includes: a manual stop valve, a filter, a pneumatic stop valve, a throttle valve, a pneumatic stop valve, a hydrogen filling gun, a thermometer, a pressure gauge, etc. The various devices in the hydrogen filling machine are connected through a preset connection line to form a hydrogen filling circuit, and the gas source hydrogen storage bottle and the hydrogen filling device are connected through the hydrogen filling circuit, and hydrogen is transported from the gas source hydrogen storage bottle to the vehicle-mounted hydrogen storage bottle. Figure 2 is a schematic diagram of a large flow hydrogen filling machine according to an exemplary embodiment. Figure 2 As shown, the hydrogen refueling machine includes: a first on-off valve A0V01, a filter, a hydrogen pressure gauge PT1, a mass flowmeter, a safety valve, a second on-off valve A0V02, a third on-off valve A0V03, a resistance device, a manual shut-off valve, an accuracy display device PT2, a temperature transmitter TE01, a one-way valve, a vent, an ambient temperature transmitter TE02, and a hydrogenation gun TK2.5. The first, second, and third on-off valves, and the resistance device are used to adjust the hydrogen delivery rate of the hydrogen refueling machine. The temperature of the temperature transmitter TE01 is adjusted based on the temperature data from the ambient temperature transmitter TE02 to ensure that the hydrogenation temperature remains within the normal range during the refueling process, avoiding risks caused by temperature increases. The hydrogenation machine includes a hydrogenation device, which can be a hydrogenation gun, a hydrogenation tube, etc. A plug-in sensor is installed on the hydrogenation device to detect whether the hydrogenation device is connected to the corresponding position of the on-board hydrogen storage tank.

[0056] For example, in this embodiment, a chiller is used to regulate the temperature of the temperature transmitter. The high-flow, high-pressure hydrogen refueling system includes only one chiller to cool the compressor. This design leverages the cascaded utilization of cooling energy, fully utilizing the chiller's output. Compared to traditional hydrogen refueling station processes, this design eliminates one chiller for pre-cooling the hydrogen refueling unit. This reduces initial investment costs and operating costs.

[0057] For example, in this embodiment, the hydrogen refueling machine is mainly used to refuel vehicles with hydrogen, and the vehicle can be a large transport vehicle such as a heavy truck or a long-distance train. The vehicle is equipped with an on-board hydrogen storage bottle. Usually, the volume of the on-board hydrogen storage bottle is more than 6×140L and is used to store more than 20kg of hydrogen. When the plug-in sensor on the hydrogenation device determines that the hydrogenation machine is connected to the on-board hydrogen storage bottle, the hydrogen storage volume of the on-board hydrogen storage bottle is read. When the hydrogen storage volume is greater than the set volume threshold, it is determined that the on-board hydrogen storage bottle matches the hydrogenation device, and hydrogen refueling can be carried out based on the hydrogenation device. The initial hydrogen storage pressure in the on-board hydrogen storage bottle is determined by the detection device. For example, the hydrogen storage meter in the on-board terminal can be obtained by the hydrogenation machine, and the hydrogen remaining data recorded on the hydrogen storage meter can be read to obtain the initial hydrogen storage pressure in the on-board hydrogen storage bottle. The relevant staff can also read the energy display data on the vehicle to obtain the initial hydrogen storage pressure of the vehicle, and input the initial hydrogen storage pressure into the hydrogenation machine.

[0058] Step S12: Select the level with the smallest pressure difference from the multiple hydrogen transmission levels of the gas source hydrogen storage bottle as the target hydrogen transmission level of the gas source hydrogen storage bottle. The pressure difference of any hydrogen transmission level is the difference between the maximum hydrogen transmission pressure corresponding to the hydrogen transmission level and the initial hydrogen storage pressure.

[0059] It is worth mentioning that in this embodiment, the gas source hydrogen storage bottle includes multiple hydrogen transmission levels, and the hydrogen transmission pressure in the gas source hydrogen storage bottle remains constant at different hydrogen transmission levels. For example, the hydrogen transmission level may include: high-pressure hydrogen transmission level, medium-pressure hydrogen transmission level and low-pressure hydrogen transmission level. For example, the hydrogen transmission pressure of the low-pressure hydrogen transmission level is 20MPa, the hydrogen transmission pressure of the medium-pressure hydrogen transmission level is 40MPa, and the hydrogen transmission pressure of the high-pressure hydrogen transmission level is 60MPa. After determining the initial hydrogen storage pressure in the on-board hydrogen storage bottle through the above steps, the hydrogen transmission level closest to the initial hydrogen storage pressure is selected from the multiple hydrogen transmission levels as the target hydrogen transmission level under the current state of the vehicle. It should be noted that in order for the hydrogen in the gas source hydrogen storage bottle to be successfully added to the on-board hydrogen storage bottle, the hydrogen transmission pressure corresponding to the hydrogen transmission level of the gas source hydrogen storage bottle needs to be greater than the initial hydrogen storage pressure of the on-board hydrogen storage bottle. In addition, it is necessary to select the hydrogen transmission level closest to the initial hydrogen storage pressure to avoid the risk of excessive hydrogen transmission pressure causing the temperature to rise too quickly during hydrogen transmission, which brings about risks.

[0060] Under normal circumstances, the temperature in the on-board hydrogen storage bottle cannot exceed 85°C at maximum flow rate. To avoid a rapid temperature rise under high pressure and high flow rate, this embodiment uses multi-level hydrogen transmission pressure to refill the on-board hydrogen storage bottle with hydrogen. Based on the vehicle's hydrogen storage pressure, the hydrogen transmission pressure is adjusted until the hydrogen storage in the on-board hydrogen storage bottle reaches the preset maximum hydrogen storage capacity. First, based on the initial hydrogen storage pressure, the closest hydrogen transmission level is selected, and hydrogen refilling is performed based on this hydrogen transmission level. When the hydrogen storage pressure of the on-board hydrogen storage bottle reaches the maximum hydrogen transmission pressure of this hydrogen transmission level, if the hydrogen storage capacity of the on-board hydrogen storage bottle reaches the preset maximum storage capacity, hydrogen refilling is stopped. If the hydrogen storage capacity of the on-board hydrogen storage bottle has not reached the preset maximum storage capacity, a hydrogen transmission level higher than the current level is selected to refill the on-board hydrogen storage bottle with hydrogen.

[0061] Step S13, calculating the maximum pressure difference for hydrogen filling according to the target hydrogen transmission pressure at the target hydrogen transmission level and the initial hydrogen storage pressure.

[0062] For example, in this embodiment, different hydrogen transmission levels include different hydrogen transmission pressures. After determining the target hydrogen transmission level through the above steps, the maximum hydrogen transmission pressure at the target hydrogen transmission level is determined as the target hydrogen transmission pressure. The target hydrogen transmission pressure is subtracted from the hydrogen storage pressure to generate the maximum pressure difference when hydrogen is refueled to the current vehicle.

[0063] Step S14: Determine the target filling flow rate of the on-board hydrogen storage bottle based on the maximum pressure difference and the preset hydrogenation resistance.

[0064] For example, in this embodiment, hydrogen filling needs to be performed at a high flow rate to improve hydrogen filling efficiency. After determining the maximum pressure difference between the gas source and the on-board hydrogen storage bottle through the above steps, the target filling flow rate of the on-board hydrogen storage bottle is determined based on the maximum pressure difference and the preset hydrogen filling resistance. Among them, the preset hydrogen filling resistance is related to the cross-sectional area of ​​the hydrogen filling gun in the hydrogen filling machine. The model of the hydrogen filling machine is fixed, and the corresponding hydrogen filling resistance is constant. Through the flow rate calculation formula, the target filling flow rate of the on-board hydrogen storage bottle can be determined based on the maximum pressure difference and the preset hydrogen filling resistance.

[0065] Step S15: hydrogen filling is performed based on the target hydrogen delivery level and the target filling flow rate.

[0066] For example, in this embodiment, the hydrogen filling machine is adjusted according to the target hydrogen transmission level, and the hydrogen storage bottle is filled with hydrogen at a preset maximum flow rate based on the adjusted hydrogen filling machine and the target filling flow rate determined in the above steps, thereby increasing the speed of hydrogen filling.

[0067] Optionally, in one embodiment, the above step S15 includes:

[0068] Determining target on / off states of multiple flow rate regulating valves in a preset hydrogenation line and target resistance values ​​of resistance control resistors in the preset hydrogenation line according to the target filling flow rate;

[0069] Based on the target on / off state and the target resistance value, the preset hydrogenation route is adjusted to generate a target hydrogenation route;

[0070] Hydrogen is added according to the target hydrogenation route and target filling flow rate.

[0071] For example, the above Figure 2 Take the large flow hydrogen filling machine in the example as an example, adjust according to the target filling flow rate Figure 2 The target on-off states of multiple flow rate regulating valves in the hydrogenation circuit are preset, wherein the multiple flow rate regulating valves include the above Figure 2 The first switch valve, the second switch valve, and the third switch valve in the embodiment of the present invention are configured such that different on-off states of the switch valves are set for different target filling flow rates. For example, the target on-off states of the first switch valve, the second switch valve, and the third switch valve are set based on the target filling flow rate.

[0072] Alternatively, in another embodiment, the step of “determining target on / off states of a plurality of flow rate regulating valves in a preset hydrogenation line according to the target filling flow rate” includes:

[0073] When the target filling flow rate is a low-speed hydrogen transmission level, determining that the branch regulating valves among the multiple flow rate regulating valves are closed and the main regulating valve is connected;

[0074] When the target filling flow rate is a mid-range hydrogen transmission level, the branch regulating valve is ensured to be open and the main regulating valve is ensured to be closed;

[0075] When the target filling flow rate is a high-end hydrogen transmission level, it is determined that the plurality of flow rate regulating valves are all in a conducting state.

[0076] For example, in this embodiment, the target filling flow rate includes a low-range hydrogen transmission level, a mid-range hydrogen transmission level, and a high-range hydrogen transmission level. Different target filling flow rates correspond to different hydrogen transmission levels in the hydrogenation equipment, wherein the magnitude relationship of the hydrogen transmission flow rates at each level is: low-range hydrogen transmission level < mid-range hydrogen transmission level < high-range hydrogen transmission level. At different target filling flow rates, the on-off state of the switch valve in the preset hydrogenation circuit is different. When the target filling flow rate is the low-range hydrogen transmission level, it is determined that the branch regulating valves among the multiple flow rate regulating valves are closed, and the main regulating valve is turned on; when the target filling flow rate is the mid-range hydrogen transmission level, it is determined that the branch regulating valves are turned on, and the main regulating valve is closed; when the target filling flow rate is the high-range hydrogen transmission level, it is determined that the multiple flow rate regulating valves are all in the on state.

[0077] Optionally, in another embodiment, after the above step S15, the method further includes:

[0078] When the hydrogen storage pressure of the on-board hydrogen storage tank reaches the target hydrogen delivery pressure, determine the hydrogen storage volume of the on-board hydrogen storage tank;

[0079] If the hydrogen storage volume is greater than or equal to the preset maximum volume, hydrogen filling is stopped;

[0080] If the hydrogen storage volume is less than the preset maximum volume, the first hydrogen transmission level is used as the target hydrogen transmission level, and the above steps of hydrogen filling based on the target hydrogen transmission pressure and the initial hydrogen storage pressure at the target hydrogen transmission level, the target hydrogen transmission level, the resistance coefficient and the preset maximum flow rate are repeated, wherein the maximum hydrogen transmission pressure of the first hydrogen transmission level is greater than the maximum hydrogen transmission pressure of the target hydrogen transmission level.

[0081] For example, in this embodiment, the stopping condition for hydrogen filling is whether the hydrogen storage in the hydrogen storage bottle has reached the maximum volume. When the hydrogen volume in the hydrogen storage bottle reaches the maximum volume, hydrogen filling is stopped. When the hydrogen storage pressure of the on-board hydrogen storage bottle is greater than the target hydrogen transmission pressure, it means that under the current state, hydrogen cannot be delivered to the on-board hydrogen storage bottle when hydrogen is refilled at the current hydrogen transmission pressure. At this time, the hydrogen storage volume in the hydrogen storage bottle is compared with the preset maximum volume. When the current hydrogen storage volume is greater than or equal to the preset maximum volume, hydrogen filling is stopped; when the hydrogen storage volume is less than the preset maximum volume, the first hydrogen transmission level is used as the target hydrogen transmission level, and the above steps of hydrogen filling based on the target hydrogen transmission pressure and the initial hydrogen storage pressure under the target hydrogen transmission level are repeated until the target hydrogen transmission level, the resistance coefficient and the preset maximum flow rate are reached, wherein the maximum hydrogen transmission pressure of the first hydrogen transmission level is greater than the maximum hydrogen transmission pressure of the target hydrogen transmission level.

[0082] For example, a 35MPa hydrogen storage bus is refueled with hydrogen using the above method, where the main parameters of the hydrogen storage bus are: hydrogen storage volume: 140L×8; rated working pressure: 35.0MPa; maximum working pressure: 43.8MPa; filling ambient temperature: 18°C; the bus is refueled with hydrogen using the high-flow high-pressure hydrogen filling system of the present invention, and the initial state parameters of the bus hydrogen storage system are:

[0083] Initial pressure temperature volume Ambient temperature 2.3MPa 18℃ 1120L 18℃

[0084] After filling, the state parameters of the bus hydrogen storage system are:

[0085] Filling end pressure temperature volume Ambient temperature 36.8MPa 57℃ 1120L 18℃

[0086] When refueling this bus, the average refueling mass flow rate of the high-pressure hydrogen refueling system is about 2.7kg / min, which greatly improves the hydrogen refueling speed of the hydrogen refueling machine.

[0087] Optionally, in another embodiment, after the step S15, the method further comprises:

[0088] In the case that the actual filling flow rate is less than the set flow rate threshold, obtaining the current ambient temperature of the vehicle-mounted hydrogen storage cylinder;

[0089] If the temperature difference is less than the temperature difference threshold, adjusting the target filling flow rate to a high-grade hydrogen delivery level, wherein the temperature difference is the difference between the current ambient temperature and the maximum hydrogen filling temperature.

[0090] In the example, in the process of hydrogen filling at the target filling flow rate in the embodiment, the actual filling flow rate may be less than the target filling flow rate due to the influence of resistance factors. And when the actual filling flow rate is less than the set flow rate threshold, the target filling flow rate of the hydrogen filling machine needs to be increased to ensure the rate of hydrogen filling. In the embodiment, when the actual filling flow rate is less than the set flow rate threshold, the current ambient temperature of the vehicle-mounted hydrogen storage cylinder is obtained. It is worth mentioning that, in order to avoid the danger existing in the hydrogen filling process, the current ambient temperature of the vehicle-mounted hydrogen storage cylinder in the hydrogen filling process needs to be less than the maximum hydrogen filling temperature, so when the flow rate needs to be increased, it is necessary to determine whether the current ambient temperature is less than the maximum hydrogen filling temperature. In the example, in the embodiment, when the difference between the current ambient temperature and the maximum hydrogen filling temperature is less than the temperature difference threshold, the hydrogen delivery level of the target filling flow rate is adjusted from the resistance hydrogen delivery level to the medium hydrogen delivery level, or from the medium hydrogen delivery level to the high hydrogen delivery level based on increasing the target filling flow rate.

[0091] Optionally, in another embodiment, the step S14 comprises:

[0092] Based on the ambient temperature detection device, obtaining the current ambient temperature of the vehicle-mounted hydrogen storage cylinder;

[0093] According to the maximum pressure difference and the maximum ambient temperature difference, determining a flow limiting coefficient, wherein the maximum ambient temperature difference is the difference between the maximum hydrogen filling temperature and the current ambient temperature;

[0094] According to the maximum pressure difference and the preset hydrogen filling resistance, determining an initial target filling flow rate;

[0095] Multiplying the flow limiting coefficient and the initial target filling flow rate to generate the target filling flow rate.

[0096] For example, in this embodiment, the hydrogen refueling machine is provided with an ambient temperature detection device for detecting the current ambient temperature in the on-board hydrogen storage bottle. Under normal circumstances, the maximum temperature in the on-board hydrogen storage bottle cannot exceed 85°C during hydrogen refueling. Therefore, it is necessary to control the hydrogenation temperature below 85°C by limiting the hydrogenation speed. The maximum hydrogenation temperature is subtracted from the current ambient temperature to generate the maximum ambient temperature difference. Based on the maximum ambient temperature difference and the maximum pressure difference, the flow limiting coefficient of the hydrogen refueling machine is calculated and generated, and the target refueling flow rate of the hydrogen refueling machine is determined according to the flow limiting coefficient.

[0097] It is worth mentioning that in this embodiment, an initial target filling flow rate can be determined based on the maximum pressure difference and the preset hydrogenation resistance. This initial target filling flow rate is multiplied by the flow limiting coefficient to generate the target filling flow rate. By determining the target filling flow rate based on the flow limiting coefficient, the hydrogenation machine can be passively regulated to avoid the danger of excessive flow rate leading to an increase in ambient temperature. This approach increases the speed and efficiency of hydrogen filling while ensuring the safety of hydrogen filling.

[0098] Through the above technical solution, in response to the hydrogenation device being connected to the on-board hydrogen storage bottle, the initial hydrogen storage pressure of the on-board hydrogen storage bottle is obtained, and the level with the smallest pressure difference is selected from the multiple hydrogen transmission levels of the gas source hydrogen storage bottle as the target hydrogen transmission level of the gas source hydrogen storage bottle. The pressure difference of any hydrogen transmission level is the difference between the maximum hydrogen transmission pressure corresponding to the hydrogen transmission level and the initial hydrogen storage pressure. Based on the target hydrogen transmission pressure and the initial hydrogen storage pressure at the target hydrogen transmission level, the maximum pressure difference for hydrogen refueling is calculated. Based on the maximum pressure difference and the preset hydrogenation resistance, the target refueling flow rate of the on-board hydrogen storage bottle is determined, and hydrogen refueling is performed based on the target hydrogen transmission level and the target refueling flow rate. Thus, different hydrogen transmission levels are used for hydrogen transmission based on different pressure differences, and hydrogen refueling is performed at a high flow rate during operation. By using a passive adjustment method, the refueling process is simplified, and the hydrogen transmission efficiency is significantly improved.

[0099] Figure 3 is a block diagram of a hydrogen filling device according to an exemplary embodiment. Figure 4 As shown, the apparatus 100 includes: an acquisition module 110 , a selection module 120 , a first determination module 130 , a second determination module 140 and an execution module 150 .

[0100] An acquisition module 110 is configured to acquire an initial hydrogen storage pressure of the on-board hydrogen storage bottle in response to the hydrogen refueling device being connected to the on-board hydrogen storage bottle;

[0101] The selection module 120 is configured to select the level with the smallest pressure difference from the multiple hydrogen transmission levels of the gas source hydrogen storage bottle as the target hydrogen transmission level of the gas source hydrogen storage bottle; the pressure difference of any hydrogen transmission level is the difference between the maximum hydrogen transmission pressure corresponding to the hydrogen transmission level and the initial hydrogen storage pressure;

[0102] A first determination module 130 is configured to calculate a maximum pressure difference for hydrogen refueling based on a target hydrogen transmission pressure and an initial hydrogen storage pressure at a target hydrogen transmission level;

[0103] The second determining module 140 is configured to determine a target filling flow rate of the on-board hydrogen storage tank based on the maximum pressure difference and a preset hydrogen filling resistance;

[0104] The execution module 150 is configured to perform hydrogen filling based on the target hydrogen delivery level and the target filling flow rate.

[0105] Optionally, the execution module 150 includes:

[0106] A determination submodule, configured to determine target on / off states of multiple flow rate regulating valves in a preset hydrogenation line and target resistance values ​​of resistance control resistors in the preset hydrogenation line according to a target filling flow rate;

[0107] A generation submodule, configured to adjust a preset hydrogenation route based on a target on / off state and a target resistance value to generate a target hydrogenation route;

[0108] The execution submodule is used to perform hydrogen filling according to the target hydrogen filling route and the target filling flow rate.

[0109] Optionally, the determination submodule is used to:

[0110] When the target filling flow rate is a low-speed hydrogen transmission level, determining that the branch regulating valves among the multiple flow rate regulating valves are closed and the main regulating valve is connected;

[0111] When the target filling flow rate is a mid-range hydrogen transmission level, the branch regulating valve is ensured to be open and the main regulating valve is ensured to be closed;

[0112] When the target filling flow rate is a high-end hydrogen transmission level, it is determined that the plurality of flow rate regulating valves are all in a conducting state.

[0113] Optionally, the apparatus 100 further includes an adjustment module, which is configured to:

[0114] When the actual filling flow rate is less than the set flow rate threshold, obtain the current ambient temperature of the on-board hydrogen storage tank;

[0115] If the temperature difference is less than the temperature difference threshold, the target filling flow rate is adjusted to a high-end hydrogen delivery level, wherein the temperature difference is the difference between the current ambient temperature and the maximum hydrogen filling temperature.

[0116] Optionally, the second determining module 140 is configured to:

[0117] Based on the ambient temperature detection device, obtain the current ambient temperature of the on-board hydrogen storage tank;

[0118] Determine the flow limiting coefficient based on the maximum pressure difference and the maximum ambient temperature difference, wherein the maximum ambient temperature difference is the difference between the maximum hydrogenation temperature and the current ambient temperature;

[0119] Determine the initial target filling flow rate based on the maximum pressure difference and the preset hydrogenation resistance;

[0120] Multiply the restriction factor and the initial target fill flow rate to generate the target fill flow rate.

[0121] Optionally, the apparatus 100 includes a determination module, the determination module being configured to:

[0122] When the hydrogen storage pressure of the on-board hydrogen storage tank reaches the target hydrogen delivery pressure, determine the hydrogen storage volume of the on-board hydrogen storage tank;

[0123] If the hydrogen storage volume is greater than or equal to the preset maximum volume, hydrogen filling is stopped;

[0124] If the hydrogen storage volume is less than the preset maximum volume, the first hydrogen transmission level is used as the target hydrogen transmission level, and the above steps of filling hydrogen based on the target hydrogen transmission pressure under the target hydrogen transmission level and the initial hydrogen storage pressure are repeated until the target hydrogen transmission level and the target filling flow rate are filled, wherein the maximum hydrogen transmission pressure of the first hydrogen transmission level is greater than the maximum hydrogen transmission pressure of the target hydrogen transmission level.

[0125] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0126] Figure 4 FIG. 4 is a block diagram of an electronic device 400 according to an exemplary embodiment. Figure 4 As shown, the electronic device 400 may include: a processor 401 , a memory 402 , and may further include one or more of a multimedia component 403 , an input / output (I / O) interface 404 , and a communication component 405 .

[0127] The processor 401 is configured to control overall operations of the electronic device 400 to complete all or part of the steps of the hydrogen refilling method described above. The memory 402 is configured to store various types of data to support operations of the electronic device 400, which can include, for example, instructions for any application or method operating on the electronic device 400, and application-related data, such as contact data, sent and received messages, pictures, audio, video, and the like. The memory 402 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk, or an optical disk. The multimedia component 403 can include a screen and an audio component. The screen can be, for example, a touch screen, and the audio component is configured to output and / or input audio signals. For example, the audio component can include a microphone configured to receive external audio signals. The received audio signals can be further stored in the memory 402 or transmitted through the communication component 405. The audio component also includes at least one speaker configured to output audio signals. The I / O interface 404 provides an interface between the processor 401 and other interface modules, which can be a keyboard, a mouse, a button, and the like. The buttons can be virtual buttons or physical buttons. The communication component 405 is configured to perform wired or wireless communication between the electronic device 400 and other devices. The wireless communication, such as Wi-Fi, Bluetooth, near field communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 4G, and the like, or a combination of one or more of them, is not limited herein. Therefore, the corresponding communication component 405 can include a Wi-Fi module, a Bluetooth module, an NFC module, and the like.

[0128] In an exemplary embodiment, the electronic device 400 can 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 above-mentioned hydrogen refueling method.

[0129] In another exemplary embodiment, a computer-readable storage medium including program instructions is further provided. When executed by a processor, the program instructions implement the steps of the above-described hydrogen refueling method. For example, the computer-readable storage medium may be the aforementioned memory 402 including the program instructions. The program instructions may be executed by the processor 401 of the electronic device 400 to perform the above-described hydrogen refueling method.

[0130] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program executable by a programmable device, and has a code portion for performing the above-mentioned hydrogen refueling method when executed by the programmable device.

[0131] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0132] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction.

[0133] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A hydrogen filling method, characterized in that: The method comprises: In response to the hydrogen refueling device being connected to the on-board hydrogen storage bottle, obtaining the initial hydrogen storage pressure of the on-board hydrogen storage bottle; From multiple hydrogen transmission levels of the gas source hydrogen storage bottle, select the level with the smallest pressure difference as the target hydrogen transmission level of the gas source hydrogen storage bottle; the pressure difference of any hydrogen transmission level is the difference between the maximum hydrogen transmission pressure corresponding to the hydrogen transmission level and the initial hydrogen storage pressure; Calculating a maximum pressure difference for hydrogen refueling according to the target hydrogen delivery pressure at the target hydrogen delivery level and the initial hydrogen storage pressure; determining a target filling flow rate of the on-board hydrogen storage bottle according to the maximum pressure difference and a preset hydrogenation resistance; filling hydrogen based on the target hydrogen delivery level and the target filling flow rate; The step of determining a target filling flow rate of the on-board hydrogen storage bottle according to the maximum pressure difference and the preset hydrogenation resistance includes: Acquiring the current ambient temperature of the vehicle-mounted hydrogen storage bottle based on the ambient temperature detection device; Determining a flow limiting coefficient according to the maximum pressure difference and the maximum ambient temperature difference, wherein the maximum ambient temperature difference is the difference between the maximum hydrogenation temperature and the current ambient temperature; determining an initial target filling flow rate according to the maximum pressure difference and the preset hydrogenation resistance; The flow restriction coefficient and the initial target filling flow rate are multiplied to generate the target filling flow rate.

2. The method according to claim 1, characterized in that The hydrogen filling based on the target hydrogen delivery level and the target filling flow rate includes: Determining target on / off states of a plurality of flow rate regulating valves in a preset hydrogenation line and target resistance values ​​of resistance control resistors in the preset hydrogenation line according to the target filling flow rate; Based on the target on / off state and the target resistance value, adjusting the preset hydrogenation route to generate a target hydrogenation route; Hydrogen filling is performed according to the target hydrogen filling route and the target filling flow rate.

3. The method according to claim 2, characterized in that The step of determining target on / off states of a plurality of flow rate regulating valves in a preset hydrogenation line according to the target filling flow rate includes: When the target filling flow rate is a low-speed hydrogen transmission level, determining that the branch regulating valves among the plurality of flow rate regulating valves are closed and the main regulating valve is opened; When the target filling flow rate is a mid-range hydrogen transmission level, determining that the branch regulating valve is turned on and the main regulating valve is turned off; When the target filling flow rate is a high-end hydrogen transmission level, it is determined that the plurality of flow rate regulating valves are all in a conducting state.

4. The method according to claim 1, wherein The method further comprises: When the actual filling flow rate is less than the set flow rate threshold, obtaining the current ambient temperature of the on-board hydrogen storage tank; If the temperature difference is less than a temperature difference threshold, the target filling flow rate is adjusted to a high-end hydrogen delivery level, wherein the temperature difference is the difference between the current ambient temperature and the maximum hydrogen filling temperature.

5. The method according to claim 1, wherein The method further comprises: When the hydrogen storage pressure of the on-board hydrogen storage bottle reaches the target hydrogen transmission pressure, determining the hydrogen storage volume of the on-board hydrogen storage bottle; If the hydrogen storage volume is greater than or equal to the preset maximum volume, stopping hydrogen filling; If the hydrogen storage volume is less than the preset maximum volume, the first hydrogen transmission level is used as the target hydrogen transmission level, and the above steps of filling hydrogen based on the target hydrogen transmission level and the target filling flow rate are repeated according to the target hydrogen transmission pressure under the target hydrogen transmission level and the initial hydrogen storage pressure, wherein the maximum hydrogen transmission pressure of the first hydrogen transmission level is greater than the maximum hydrogen transmission pressure of the target hydrogen transmission level.

6. A hydrogen filling device, characterized in that: The device comprises: an acquisition module, configured to acquire an initial hydrogen storage pressure of the on-board hydrogen storage bottle in response to the hydrogen refueling device being connected to the on-board hydrogen storage bottle; A selection module is configured to select a level with the smallest pressure difference from multiple hydrogen transmission levels of the gas source hydrogen storage bottle as the target hydrogen transmission level of the gas source hydrogen storage bottle; the pressure difference of any hydrogen transmission level is the difference between the maximum hydrogen transmission pressure corresponding to the hydrogen transmission level and the initial hydrogen storage pressure; a first determining module, configured to calculate a maximum pressure difference for hydrogen filling according to a target hydrogen transmission pressure at the target hydrogen transmission level and the initial hydrogen storage pressure; A second determination module is configured to determine a target filling flow rate of the on-board hydrogen storage bottle according to the maximum pressure difference and a preset hydrogenation resistance; Determining the target filling flow rate of the on-board hydrogen storage bottle based on the maximum pressure difference and the preset hydrogenation resistance includes: obtaining the current ambient temperature of the on-board hydrogen storage bottle based on an ambient temperature detection device; determining a flow limiting coefficient based on the maximum pressure difference and the maximum ambient temperature difference, wherein the maximum ambient temperature difference is the difference between the maximum hydrogenation temperature and the current ambient temperature; determining an initial target filling flow rate based on the maximum pressure difference and the preset hydrogenation resistance; and multiplying the flow limiting coefficient by the initial target filling flow rate to generate the target filling flow rate. An execution module is configured to perform hydrogen filling based on the target hydrogen delivery level and the target filling flow rate.

7. The device according to claim 6, characterized in that The execution module includes: a determination submodule, configured to determine, based on the target filling flow rate, target on-off states of a plurality of flow rate regulating valves in a preset hydrogenation circuit and a target resistance value of a resistance control resistor in the preset hydrogenation circuit; a generating submodule, configured to adjust the preset hydrogenation route based on the target on / off state and the target resistance value to generate a target hydrogenation route; The execution submodule is configured to perform hydrogen filling according to the target hydrogen filling route and the target filling flow rate.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

9. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 5.

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