Hydrogen charging management method for solid hydrogen storage device

Abstract

This application provides a hydrogen charging management method for a solid-state hydrogen storage device, relating to the field of hydrogen storage technology. The method includes: charging the solid-state hydrogen storage device with hydrogen at a preset flow rate by connecting a hydrogen charging gun to the first inlet of the device; controlling the exhaust end of the device to discharge heat-exchanged hydrogen; starting a circulation pump to input the hydrogen discharged from the exhaust end into a cooling device for cooling via a circulation pipeline, and then charging the solid-state hydrogen storage device with the cooled hydrogen through a second inlet via the circulation pipeline; stopping the charging process when the solid hydrogen storage material in the device reaches hydrogen absorption saturation. This method allows for the charging of the solid-state hydrogen storage device with a preset flow rate of hydrogen, carrying away the heat generated by the hydrogen absorption of the solid hydrogen storage material from the device. After charging is complete, the solid-state hydrogen storage device discharges a small amount of hydrogen, resulting in high safety.

Description

Technical Field

[0001] This application relates to the field of hydrogen storage technology, and in particular to a method for managing the hydrogen charging of a solid-state hydrogen storage device. Background Technology

[0002] Hydrogen storage technologies mainly include material-based hydrogen storage and physical hydrogen storage. Physical hydrogen storage is divided into gaseous hydrogen storage and liquid hydrogen storage. Gaseous hydrogen storage, with its advantages of fast hydrogen charging and discharging rates, low energy consumption, low cost, and mature technology, has become the first commercially applied hydrogen storage technology. Solid-state hydrogen storage technology, due to its advantages of high volumetric hydrogen storage density, safety, no need for high-pressure containers, and ability to improve hydrogen purity, can solve the two most pressing concerns of high-density hydrogen storage and safe application. Furthermore, the hydrogen pressure generated by PEM and AEM electrolysis of water meets the charging pressure requirements for solid-state hydrogen storage. Therefore, solid-state hydrogen storage technology is considered one of the best hydrogen storage methods for off-grid power generation in conjunction with renewable energy sources.

[0003] Solid-state hydrogen storage refers to storing hydrogen in solid materials using the physical and chemical adsorption of hydrogen. During the hydrogen filling process, the alloy hydrogen storage material undergoes an exothermic reaction under certain temperature and hydrogen pressure, absorbing hydrogen and forming metal hydrides. Current technologies continuously introduce hydrogen into the solid-state hydrogen storage device, carrying away the heat released by the solid-state hydrogen storage material after hydrogen absorption. This leaves a large amount of hydrogen remaining after filling, posing certain safety hazards. Summary of the Invention

[0004] To address the aforementioned issues, this application proposes a hydrogen charging management method for a solid-state hydrogen storage device. This method solves the technical problem in the prior art where hydrogen is continuously introduced into the solid-state hydrogen storage device to remove the heat generated by the hydrogen absorption of the solid hydrogen storage material, resulting in a large amount of hydrogen remaining after charging, which poses certain safety hazards. The proposed method can charge the solid-state hydrogen storage device with a preset hydrogen flow rate, remove the heat generated by the hydrogen absorption of the solid hydrogen storage material, and discharge a small amount of hydrogen after charging, thus ensuring higher safety.

[0005] This application provides a hydrogen charging management method for a solid-state hydrogen storage device, the method comprising:

[0006] Connect the hydrogen refueling gun to the first gas inlet of the solid hydrogen storage device and fill the solid hydrogen storage device with hydrogen gas of a preset hydrogen flow rate.

[0007] The exhaust end of the solid hydrogen storage device is controlled to discharge hydrogen gas that has undergone heat exchange;

[0008] Start the circulation pump to input the hydrogen gas discharged from the exhaust end into the cooling device through the circulation pipeline, and then input the cooled hydrogen gas into the solid hydrogen storage device through the second air inlet of the solid hydrogen storage device through the circulation pipeline.

[0009] When the solid hydrogen storage material in the solid hydrogen storage device reaches hydrogen absorption saturation, hydrogen charging stops.

[0010] In some embodiments, the method includes:

[0011] After the hydrogen refueling gun fills the solid hydrogen storage device with a preset hydrogen flow rate, it stops filling the solid hydrogen storage device with hydrogen.

[0012] In some embodiments, the method includes:

[0013] The flow rate of consumed hydrogen stored in the identification storage unit of the solid hydrogen storage device is obtained;

[0014] The preset hydrogen flow rate of the solid hydrogen storage device is determined by summing the consumed hydrogen flow rate and the corrected hydrogen flow rate.

[0015] In some embodiments, the method includes:

[0016] Obtain the remaining hydrogen flow rate and total hydrogen flow rate of the solid-state hydrogen storage device;

[0017] Based on the remaining hydrogen flow rate and the total hydrogen flow rate, the absolute difference is calculated to obtain the hydrogen consumption flow rate of the solid-state hydrogen storage device.

[0018] The consumed hydrogen flow rate is stored in the identification storage unit of the solid-state hydrogen storage device.

[0019] In some embodiments, the method includes:

[0020] The real-time temperature inside the solid hydrogen storage device is obtained at a preset acquisition cycle;

[0021] When the real-time temperature is greater than the preset temperature threshold, the exhaust end of the solid hydrogen storage device is controlled to discharge hydrogen that has undergone heat exchange.

[0022] In some embodiments, the method includes:

[0023] A temperature sensor is used to obtain the real-time temperature inside the solid hydrogen storage device at a preset acquisition period.

[0024] In some embodiments, the method includes:

[0025] If the real-time temperature inside the solid hydrogen storage device remains within a preset temperature range for a period of time exceeding a preset time, it is determined that the solid hydrogen storage material inside the solid hydrogen storage device has reached hydrogen absorption saturation, and hydrogen charging is stopped.

[0026] In some embodiments, the method includes:

[0027] When the solid hydrogen storage device stops charging hydrogen, the hydrogen gas discharged from the exhaust end of the solid hydrogen storage device after heat exchange is cooled by the cooling device and then fed into the hydrogen refueling machine through the recovery pipeline for recovery.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] By connecting the hydrogen refueling nozzle to the first inlet of the solid-state hydrogen storage device, hydrogen gas of a preset flow rate is introduced into the device. The exhaust end of the device discharges heat-exchanged hydrogen gas. A circulation pump is started, and the hydrogen gas discharged from the exhaust end is fed into a cooling device via a circulation pipeline for cooling. The cooled hydrogen gas is then fed back into the solid-state hydrogen storage device through the second inlet via the circulation pipeline. Once the solid-state hydrogen storage material reaches hydrogen saturation, hydrogen refueling stops. This method allows for the introduction of a preset flow rate of hydrogen gas into the solid-state hydrogen storage device, carrying away the heat generated by the hydrogen absorption of the solid-state hydrogen storage material. After refueling, the device discharges a small amount of hydrogen gas, resulting in a high level of safety. Attached Figure Description

[0030] The embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0031] Figure 1 This is a schematic diagram illustrating the implementation process of a hydrogen charging management method for a solid-state hydrogen storage device provided in an embodiment of this application. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0034] If the application documents contain similar descriptions such as "first, second, third", the following explanation shall be added: In the following description, the terms "first, second, third" are used only to distinguish similar objects and do not represent a specific order of objects. It is understood that "first, second, third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0036] This application provides a method for managing the hydrogen charging of a solid-state hydrogen storage device. Figure 1 This is a schematic diagram illustrating the implementation process of a hydrogen charging management method for a solid-state hydrogen storage device provided in an embodiment of this application, as shown below. Figure 1 As shown, the method includes:

[0037] Step S1: Connect the hydrogen refueling gun to the first gas inlet of the solid hydrogen storage device and fill the solid hydrogen storage device with hydrogen gas of a preset flow rate.

[0038] In this embodiment of the invention, the hydrogen dispensing nozzle of the hydrogen dispenser is connected to the first inlet of the solid hydrogen storage device, the second inlet of the solid hydrogen storage device is connected to the output of the circulation pipeline, and the exhaust end of the solid hydrogen storage device is connected to the input of the circulation pipeline. The controller of the solid hydrogen storage device is communicatively connected to the controller of the hydrogen dispenser. The hydrogen dispenser is set with a preset hydrogen flow rate to be supplied to the solid hydrogen storage device. The controller of the hydrogen dispenser sends a hydrogen dispensing command to the controller of the solid hydrogen storage device. The controller of the solid hydrogen storage device controls the opening of the valve and mass flow meter at the first inlet, supplying the solid hydrogen storage device with the preset hydrogen flow rate. The solid hydrogen storage material in the solid hydrogen storage device absorbs and stores the hydrogen. After the hydrogen dispensing nozzle supplies the solid hydrogen storage device with the preset hydrogen flow rate, the supply of hydrogen to the solid hydrogen storage device stops. That is, the controller of the solid hydrogen storage device controls the closing of the valve and mass flow meter at the first inlet.

[0039] Step S2: Control the exhaust end of the solid hydrogen storage device to discharge hydrogen gas that has undergone heat exchange;

[0040] In this embodiment of the invention, the solid hydrogen storage material in the solid hydrogen storage device absorbs hydrogen and releases heat. The cold hydrogen absorbs heat and becomes hot hydrogen. The controller of the solid hydrogen storage device controls the opening of the valve and mass flow meter at the exhaust end, and discharges the hot hydrogen after heat exchange through the exhaust end, thereby carrying away the heat released by the solid hydrogen storage material in the solid hydrogen storage device, realizing the heat exchange of the solid hydrogen storage device.

[0041] Step S3: Start the circulation pump, input the hydrogen gas discharged from the exhaust end into the cooling device through the circulation pipeline, and then charge the cooled hydrogen gas into the solid hydrogen storage device through the second air inlet of the solid hydrogen storage device through the circulation pipeline.

[0042] In this embodiment of the invention, the controller of the hydrogen dispenser controls the start of the circulation pump, which introduces the hot hydrogen discharged from the exhaust end through a circulation pipeline to a cooling device for rapid cooling, resulting in cooled hydrogen gas. The controller of the solid-state hydrogen storage device controls the opening of the switch valve and mass flow meter at the second inlet, allowing the cooled hydrogen gas to be introduced into the solid-state hydrogen storage device through the second inlet. The hydrogen gas circulates within the circulation pipeline and the solid-state hydrogen storage device under the action of the circulation pump.

[0043] Step S4: The solid hydrogen storage material in the solid hydrogen storage device reaches hydrogen absorption saturation, and hydrogen charging is stopped.

[0044] In some embodiments of the present invention, the method includes:

[0045] Step S41: When the real-time temperature in the solid hydrogen storage device remains within the preset temperature range for a period of time exceeding a preset time, it is determined that the solid hydrogen storage material in the solid hydrogen storage device has reached hydrogen absorption saturation, and hydrogen charging is stopped.

[0046] In this embodiment of the invention, since the solid hydrogen storage material in the solid hydrogen storage device releases heat when absorbing hydrogen, the real-time temperature inside the device will exceed the normal temperature range. Therefore, the condition for determining that the solid hydrogen storage material has reached hydrogen absorption saturation is that the real-time temperature inside the device remains within a preset temperature range for a period exceeding a preset time. When the solid hydrogen storage material in the device reaches hydrogen absorption saturation, the controller of the device closes the switching valves at the second inlet and outlet ends, as well as the mass flow meter, to stop hydrogen charging.

[0047] In summary, by connecting the hydrogen refueling gun to the first inlet of the solid-state hydrogen storage device, a preset hydrogen flow rate is introduced into the device. The device's exhaust end is controlled to discharge heat-exchanged hydrogen. A circulation pump is started, and the discharged hydrogen is fed through a circulation pipe to a cooling device for cooling. The cooled hydrogen is then fed back into the device through the second inlet via the circulation pipe. Once the solid-state hydrogen storage material reaches hydrogen saturation, the refueling process stops. This method allows for the introduction of a preset hydrogen flow rate, carrying away the heat generated by the hydrogen absorption in the solid-state hydrogen storage material. After refueling, the device discharges a small amount of hydrogen, resulting in a high level of safety.

[0048] In some embodiments, the method includes:

[0049] Step S11: Obtain the flow rate of consumed hydrogen stored in the identification storage unit of the solid hydrogen storage device;

[0050] Step S12: Summing the consumed hydrogen flow rate and the corrected hydrogen flow rate to determine the preset hydrogen flow rate of the solid hydrogen storage device.

[0051] In this embodiment of the invention, by acquiring the consumed hydrogen flow rate stored in the identification storage unit and the preset corrected hydrogen flow rate, the preset hydrogen flow rate of the solid hydrogen storage device is calculated, which can ensure that the remaining hydrogen after the solid hydrogen storage device is filled with enough hydrogen is always maintained at the corrected hydrogen flow rate.

[0052] In some embodiments, the method includes:

[0053] Step S111: Obtain the remaining hydrogen flow rate and total hydrogen flow rate of the solid-state hydrogen storage device;

[0054] Step S112: Based on the remaining hydrogen flow rate and the total hydrogen flow rate, calculate the absolute difference to obtain the hydrogen consumption flow rate of the solid hydrogen storage device.

[0055] Step S113: Store the consumed hydrogen flow rate in the identification storage unit of the solid hydrogen storage device.

[0056] In this embodiment of the invention, the total hydrogen flow rate of the solid-state hydrogen storage device is fixed, and the remaining hydrogen flow rate can be obtained by calculating the absolute difference between the hydrogen flow rate added and the hydrogen flow rate consumed. By calculating the absolute difference between the remaining hydrogen flow rate and the total hydrogen flow rate of the solid-state hydrogen storage device, the hydrogen flow rate consumed by the solid-state hydrogen storage device can be obtained. The hydrogen flow rate consumed is stored in the identification storage unit of the solid-state hydrogen storage device, which facilitates reading the hydrogen flow rate consumed during hydrogen filling, thereby determining the preset hydrogen flow rate based on the hydrogen flow rate consumed.

[0057] In some embodiments, the method includes:

[0058] Step S21: Obtain the real-time temperature inside the solid hydrogen storage device at a preset acquisition cycle;

[0059] Step S22: When the real-time temperature is greater than the preset temperature threshold, control the exhaust end of the solid hydrogen storage device to discharge the hydrogen that has undergone heat exchange.

[0060] In this embodiment of the invention, a temperature sensor is used to acquire the real-time temperature inside the solid-state hydrogen storage device at a preset acquisition cycle. The temperature sensor is installed inside the solid-state hydrogen storage device and is communicatively connected to the controller of the solid-state hydrogen storage device. The preset temperature threshold can be the optimal hydrogen absorption temperature; maintaining the optimal hydrogen absorption temperature can improve the hydrogen filling efficiency. The normal temperature inside the solid-state hydrogen storage device is lower than the preset temperature threshold. After hydrogen is introduced through the hydrogen gun, the solid hydrogen storage material in the solid-state hydrogen storage device absorbs hydrogen and releases heat, causing the temperature inside the solid-state hydrogen storage device to rise. When the real-time temperature inside the solid-state hydrogen storage device exceeds the preset temperature threshold, the pressure inside the solid-state hydrogen storage device is relatively high, posing a certain safety hazard. At this point, the controller of the solid-state hydrogen storage device controls the opening of the exhaust valve and mass flow meter, allowing the hot hydrogen that has undergone heat exchange to be discharged through the exhaust end, reducing the pressure inside the solid-state hydrogen storage device and ensuring the safety of hydrogen filling.

[0061] In some embodiments, the method includes:

[0062] Step S5: When the solid hydrogen storage device stops charging hydrogen, the hydrogen gas discharged from the exhaust end of the solid hydrogen storage device after heat exchange is cooled by the cooling device and then fed into the hydrogen refueling machine through the recovery pipeline for recovery.

[0063] In this embodiment of the invention, the hydrogen gas discharged through the exhaust end is cooled by a cooling device and then fed into a hydrogen refueling machine through a recovery pipeline for recovery, thereby reducing costs and increasing efficiency.

[0064] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. The sequence numbers of the above-described embodiments are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0065] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, object, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, object, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, object, or apparatus that includes that element.

[0066] The above description is merely an embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for managing hydrogen charging in a solid-state hydrogen storage device, characterized in that, The method includes: Connect the hydrogen refueling gun to the first gas inlet of the solid hydrogen storage device and fill the solid hydrogen storage device with hydrogen gas of a preset hydrogen flow rate. The exhaust end of the solid hydrogen storage device is controlled to discharge hydrogen gas that has undergone heat exchange; Start the circulation pump to input the hydrogen gas discharged from the exhaust end into the cooling device through the circulation pipeline, and then input the cooled hydrogen gas into the solid hydrogen storage device through the second air inlet of the solid hydrogen storage device through the circulation pipeline. When the solid hydrogen storage material in the solid hydrogen storage device reaches hydrogen absorption saturation, hydrogen charging is stopped. Before charging with hydrogen, the flow rate of consumed hydrogen stored in the identification storage unit of the solid hydrogen storage device is obtained; The preset hydrogen flow rate of the solid hydrogen storage device is determined by summing the consumed hydrogen flow rate and the corrected hydrogen flow rate. Furthermore, the remaining hydrogen flow rate and total hydrogen flow rate of the solid-state hydrogen storage device are obtained; Based on the remaining hydrogen flow rate and the total hydrogen flow rate, the absolute difference is calculated to obtain the hydrogen consumption flow rate of the solid hydrogen storage device. The consumed hydrogen flow rate is stored in the identification storage unit of the solid-state hydrogen storage device.

2. The hydrogen charging management method for a solid-state hydrogen storage device according to claim 1, characterized in that, The method further includes: After the hydrogen refueling gun fills the solid hydrogen storage device with a preset hydrogen flow rate, it stops filling the solid hydrogen storage device with hydrogen.

3. The hydrogen charging management method for a solid-state hydrogen storage device according to claim 1, characterized in that, The method further includes: The real-time temperature inside the solid hydrogen storage device is obtained at a preset acquisition cycle; When the real-time temperature is greater than the preset temperature threshold, the exhaust end of the solid hydrogen storage device is controlled to discharge hydrogen that has undergone heat exchange.

4. The hydrogen charging management method for a solid-state hydrogen storage device according to claim 3, characterized in that, The method further includes: A temperature sensor is used to obtain the real-time temperature inside the solid hydrogen storage device at a preset acquisition period.

5. The hydrogen charging management method for a solid-state hydrogen storage device according to claim 1, characterized in that, The method further includes: If the real-time temperature inside the solid hydrogen storage device remains within a preset temperature range for a period of time exceeding a preset time, it is determined that the solid hydrogen storage material inside the solid hydrogen storage device has reached hydrogen absorption saturation, and hydrogen charging is stopped.

6. The hydrogen charging management method for a solid-state hydrogen storage device according to claim 1, characterized in that, The method further includes: When the solid hydrogen storage device stops charging hydrogen, the hydrogen gas discharged from the exhaust end of the solid hydrogen storage device after heat exchange is cooled by the cooling device and then fed into the hydrogen refueling machine through the recovery pipeline for recovery.

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