Hydrogen charging management method of solid hydrogen storage device

Abstract

The invention provides a hydrogen charging management method of a solid hydrogen storage device, and relates to the technical field of hydrogen storage, the method comprises the following steps: connecting a hydrogenation gun into a first gas inlet end of the solid hydrogen storage device, and charging hydrogen with a preset hydrogen flow into the solid hydrogen storage device; controlling the exhaust end of the solid hydrogen storage device to exhaust the hydrogen subjected to heat exchange; a circulating pump is started, hydrogen exhausted from the exhaust end is input into a cooling device through a circulating pipeline to be cooled, and the cooled hydrogen is filled into the solid hydrogen storage device through a second gas inlet end of the solid hydrogen storage device through the circulating pipeline; and when the solid hydrogen storage material in the solid hydrogen storage device reaches a hydrogen absorption saturation state, hydrogen charging is stopped. The solid hydrogen storage device can be filled with hydrogen of the preset hydrogen flow, heat generated by hydrogen absorption of the solid hydrogen storage material in the solid hydrogen storage device is brought out of the solid hydrogen storage device, the solid hydrogen storage device discharges a small amount of hydrogen after hydrogenation is completed, and safety is high.

Description

Technical Field

[0001] The present application relates to the field of hydrogen storage technology, and in particular to a hydrogen charging management method for a solid-state hydrogen storage device. Background Art

[0002] Hydrogen storage technologies mainly include material hydrogen storage and physical hydrogen storage. Physical hydrogen storage is divided into gaseous hydrogen storage and liquid hydrogen storage. Gaseous hydrogen storage has become the first commercially applied hydrogen storage technology due to its advantages such as fast hydrogen charging and discharging speed, low hydrogen storage energy consumption, low cost and mature technology. Solid-state hydrogen storage technology can solve the two problems of high-density storage and safe application of hydrogen energy that people are most concerned about, due to its high volume hydrogen storage density, safety, no need for high-pressure containers, and the ability to increase the purity of hydrogen. At the same time, the hydrogen pressure generated by PEM and AEM water electrolysis to produce hydrogen meets the solid-state hydrogen storage filling pressure, so solid-state hydrogen storage technology is considered to be one of the best hydrogen storage methods for off-grid power generation in conjunction with renewable energy.

[0003] Solid-state hydrogen storage refers to the use of materials to store hydrogen in solid materials by physical and chemical adsorption. During the hydrogen charging process, the alloy hydrogen storage material absorbs hydrogen to generate metal hydrides under a certain temperature and hydrogen pressure through an exothermic reaction. In the prior art, hydrogen is continuously introduced into the solid-state hydrogen storage device to remove the heat released by the solid-state hydrogen storage material absorbing hydrogen. After the hydrogen charging is completed, a large amount of hydrogen remains, which poses certain safety risks. Summary of the invention

[0004] In response to the above-mentioned problems, the present application proposes a hydrogen charging management method for a solid-state hydrogen storage device, which solves the technical problem in the prior art that a large amount of hydrogen remains after the hydrogen charging is completed, posing certain safety hazards. The method can charge a preset hydrogen flow of hydrogen into the solid-state hydrogen storage device to bring out the heat generated by the solid-state hydrogen storage material in the solid-state hydrogen storage device absorbing hydrogen, and discharge a small amount of hydrogen from the solid-state hydrogen storage device after the hydrogenation is completed, thereby achieving high safety.

[0005] The present application provides a method for managing hydrogen charging of a solid-state hydrogen storage device, the method comprising:

[0006] Connecting a hydrogenation gun to a first gas inlet end of a solid-state hydrogen storage device, and charging the solid-state hydrogen storage device with hydrogen at a preset hydrogen flow rate;

[0007] Controlling the exhaust end of the solid-state hydrogen storage device to discharge the hydrogen that has undergone heat exchange;

[0008] Starting the circulation pump, inputting the hydrogen discharged from the exhaust end into the cooling device through the circulation pipeline for cooling, and charging the cooled hydrogen into the solid-state hydrogen storage device through the circulation pipeline and the second air inlet end of the solid-state hydrogen storage device;

[0009] The solid-state hydrogen storage material in the solid-state hydrogen storage device reaches a hydrogen absorption saturation state, and hydrogen charging stops.

[0010] In some embodiments, the method comprises:

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

[0012] In some embodiments, the method comprises:

[0013] Obtaining the consumed hydrogen flow rate stored in the identification storage unit of the solid-state hydrogen storage device;

[0014] The preset hydrogen flow rate of the solid-state hydrogen storage device is determined based on the sum of the consumed hydrogen flow rate and the corrected hydrogen flow rate.

[0015] In some embodiments, the method comprises:

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

[0017] Based on the residual flow rate of hydrogen and the total flow rate of hydrogen, an absolute difference is calculated to obtain the consumed hydrogen 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 comprises:

[0020] Acquiring the real-time temperature in the solid-state hydrogen storage device in a preset acquisition cycle;

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

[0022] In some embodiments, the method comprises:

[0023] A temperature sensor is used to obtain the real-time temperature in the solid-state hydrogen storage device in a preset collection period.

[0024] In some embodiments, the method comprises:

[0025] When the real-time temperature in the solid-state hydrogen storage device remains within the preset temperature range for longer than a preset time, it is determined that the solid-state hydrogen storage material in the solid-state hydrogen storage device has reached a hydrogen absorption saturation state, and hydrogen charging is stopped.

[0026] In some embodiments, the method comprises:

[0027] When the solid-state hydrogen storage device stops charging hydrogen, the hydrogen that has undergone heat exchange is discharged from the exhaust end of the solid-state hydrogen storage device, cooled by a cooling device, and then input into a hydrogenator through a recovery pipeline for recovery.

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

[0029] By connecting the hydrogenation gun to the first air inlet of the solid-state hydrogen storage device, the solid-state hydrogen storage device is filled with hydrogen with a preset hydrogen flow rate; the exhaust end of the solid-state hydrogen storage device is controlled to discharge the hydrogen that has undergone heat exchange; the circulation pump is started to input the hydrogen discharged from the exhaust end into the cooling device through the circulation pipeline for cooling, and the cooled hydrogen is filled into the solid-state hydrogen storage device through the circulation pipeline and the second air inlet of the solid-state hydrogen storage device; the solid-state hydrogen storage material in the solid-state hydrogen storage device reaches a saturated state of hydrogen absorption, and hydrogen filling is stopped. The solid-state hydrogen storage device can be filled with hydrogen with a preset hydrogen flow, and the heat generated by the solid-state hydrogen storage material in the solid-state hydrogen storage device absorbing hydrogen is taken out of the solid-state hydrogen storage device. After the hydrogenation is completed, the solid-state hydrogen storage device discharges a small amount of hydrogen, which has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0031] Figure 1 A schematic diagram of the implementation flow of a hydrogen charging management method for a solid-state hydrogen storage device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0033] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be 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 similar descriptions of "first\second\third" appear in the application documents, the following instructions will be added. In the following description, the terms "first\second\third" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of the present 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 those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0036] The present application embodiment provides a hydrogen charging management method for a solid-state hydrogen storage device. Figure 1 A schematic diagram of a process flow for implementing a hydrogen charging management method for a solid-state hydrogen storage device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the method includes:

[0037] Step S1: connecting a hydrogenation gun to a first gas inlet end of a solid-state hydrogen storage device, and charging the solid-state hydrogen storage device with hydrogen at a preset hydrogen flow rate;

[0038] In an embodiment of the present invention, the hydrogenation gun of the hydrogenator is connected to the first air inlet end of the solid-state hydrogen storage device, the second air inlet end of the solid-state hydrogen storage device is connected to the output end of the circulation pipeline, the exhaust end of the solid-state hydrogen storage device is connected to the input end of the circulation pipeline, and the controller of the solid-state hydrogen storage device is communicatively connected to the controller of the hydrogenator. The preset hydrogen flow rate that needs to be filled into the solid-state hydrogen storage device is set in the hydrogenator, and the controller of the hydrogenator sends a hydrogenation instruction to the controller of the solid-state hydrogen storage device. The controller of the solid-state hydrogen storage device controls the switch valve and mass flowmeter at the first air inlet end to open, and the solid-state hydrogen storage device is filled with hydrogen with a preset hydrogen flow rate, and the solid-state hydrogen storage material of the solid-state hydrogen storage device absorbs hydrogen and stores it. Among them, after the hydrogenation gun fills the solid-state hydrogen storage device with hydrogen with a preset hydrogen flow rate, it stops filling hydrogen into the solid-state hydrogen storage device. That is, the switch valve and mass flowmeter at the first air inlet end are controlled to be closed by the controller of the solid-state hydrogen storage device.

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

[0040] In the embodiment of the present invention, the solid-state hydrogen storage material in the solid-state hydrogen storage device absorbs hydrogen and releases heat, and the cold hydrogen absorbs heat and becomes hot hydrogen. The controller of the solid-state hydrogen storage device controls the switch valve and the mass flow meter at the exhaust end to open, and the hot hydrogen after heat exchange is discharged through the exhaust end, thereby bringing out the heat released by the solid-state hydrogen storage material in the solid-state hydrogen storage device to realize heat exchange of the solid-state hydrogen storage device.

[0041] Step S3: starting the circulation pump, inputting the hydrogen discharged from the exhaust end into the cooling device through the circulation pipeline for cooling, and charging the cooled hydrogen into the solid-state hydrogen storage device through the circulation pipeline and the second air inlet end of the solid-state hydrogen storage device;

[0042] In the embodiment of the present invention, the controller of the hydrogen filling machine controls the circulation pump to start, and the hot hydrogen discharged from the exhaust end is input into the cooling device through the circulation pipeline for cooling, so that the hot hydrogen discharged from the exhaust end can be quickly cooled to obtain cooled hydrogen. The controller of the solid-state hydrogen storage device controls the switch valve and mass flow meter of the second air inlet end to open, and the hydrogen cooled by the cooling device is filled into the solid-state hydrogen storage device through the second air inlet end. Hydrogen circulates in the circulation pipeline and the solid-state hydrogen storage device under the action of the circulation pump.

[0043] Step S4: the solid-state hydrogen storage material in the solid-state hydrogen storage device reaches a hydrogen absorption saturation state, 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-state hydrogen storage device continues to be within the preset temperature range for more than a preset time, it is determined that the solid-state hydrogen storage material in the solid-state hydrogen storage device has reached a hydrogen absorption saturation state, and hydrogen charging is stopped.

[0046] In the embodiment of the present invention, since the solid-state hydrogen storage material in the solid-state hydrogen storage device releases heat when absorbing hydrogen, the real-time temperature in the solid-state hydrogen storage device will exceed the conventional temperature range. Therefore, the time that the real-time temperature in the solid-state hydrogen storage device continues in the preset temperature range exceeds the preset time, which is used as a condition for judging that the solid-state hydrogen storage material in the solid-state hydrogen storage device has reached the saturated state of hydrogen absorption. When the solid-state hydrogen storage material in the solid-state hydrogen storage device reaches the saturated state of hydrogen absorption, the controller of the solid-state hydrogen storage device controls the switch valves and the mass flowmeter at the second air inlet end and the exhaust end to close, and stop hydrogen charging.

[0047] In summary, by connecting the hydrogenation gun to the first air inlet of the solid-state hydrogen storage device, the solid-state hydrogen storage device is filled with hydrogen of a preset hydrogen flow rate; the exhaust end of the solid-state hydrogen storage device is controlled to discharge the hydrogen that has undergone heat exchange; the circulation pump is started, the hydrogen discharged from the exhaust end is input into the cooling device through the circulation pipeline for cooling, and the cooled hydrogen is filled into the solid-state hydrogen storage device through the circulation pipeline and the second air inlet of the solid-state hydrogen storage device; the solid-state hydrogen storage material in the solid-state hydrogen storage device reaches a saturated state of hydrogen absorption, and hydrogen filling is stopped. The solid-state hydrogen storage device can be filled with hydrogen of a preset hydrogen flow rate, and the heat generated by the solid-state hydrogen storage material in the solid-state hydrogen storage device absorbing hydrogen is taken out of the solid-state hydrogen storage device. After the hydrogenation is completed, the solid-state hydrogen storage device discharges a small amount of hydrogen, which has a high safety.

[0048] In some embodiments, the method comprises:

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

[0050] Step S12: Determine a preset hydrogen flow rate of the solid-state hydrogen storage device based on the sum of the consumed hydrogen flow rate and the corrected hydrogen flow rate.

[0051] In an embodiment of the present invention, by obtaining the consumed hydrogen flow stored in the identification storage unit and the pre-set corrected hydrogen flow, the preset hydrogen flow of the solid-state hydrogen storage device is calculated, which can ensure that the remaining hydrogen is always maintained at the corrected hydrogen flow after the solid-state hydrogen storage device is filled with sufficient hydrogen.

[0052] In some embodiments, the method comprises:

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

[0054] Step S112: Based on the residual flow rate of hydrogen and the total flow rate of hydrogen, an absolute difference is calculated to obtain the consumed hydrogen flow rate of the solid-state hydrogen storage device.

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

[0056] In the embodiment of the present 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 taking the absolute difference between the hydrogen flow rate charged and the hydrogen flow rate consumed. The consumed hydrogen flow rate of the solid-state hydrogen storage device can be obtained by calculating the absolute difference between the remaining hydrogen flow rate and the total hydrogen flow rate of the solid-state hydrogen storage device, and the consumed hydrogen flow rate is stored in the identification storage unit of the solid-state hydrogen storage device, so that the consumed hydrogen flow rate can be read when hydrogen is charged, thereby determining the preset hydrogen flow rate according to the consumed hydrogen flow rate.

[0057] In some embodiments, the method comprises:

[0058] Step S21: acquiring the real-time temperature in the solid-state hydrogen storage device in a preset acquisition cycle;

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

[0060] In an embodiment of the present invention, a temperature sensor is used to obtain the real-time temperature in the solid-state hydrogen storage device with a preset collection cycle. The temperature sensor is arranged in the solid-state hydrogen storage device and is connected to the controller of the solid-state hydrogen storage device. The preset temperature threshold may be an optimal hydrogen absorption temperature. Maintaining the optimal hydrogen absorption temperature may improve the hydrogen charging efficiency. The conventional temperature in the solid-state hydrogen storage device is lower than the preset temperature threshold. After hydrogen is charged through a hydrogen gun, the solid-state hydrogen storage material of the solid-state hydrogen storage device absorbs hydrogen and releases heat, causing the temperature in the solid-state hydrogen storage device to rise until the real-time temperature in the solid-state hydrogen storage device is higher than the preset temperature threshold. The pressure in the solid-state hydrogen storage device is relatively high, and there are certain safety hazards. At this time, the controller of the solid-state hydrogen storage device controls the switch valve and the mass flow meter at the exhaust end to open, and discharges the hot hydrogen after heat exchange through the exhaust end, thereby reducing the pressure in the solid-state hydrogen storage device and ensuring the safety of hydrogen charging.

[0061] In some embodiments, the method comprises:

[0062] Step S5: When the solid-state hydrogen storage device stops charging hydrogen, the hydrogen that has undergone heat exchange is discharged from the exhaust end of the solid-state hydrogen storage device, cooled by a cooling device, and then input into a hydrogenation machine through a recovery pipeline for recovery.

[0063] In the embodiment of the present invention, the hydrogen discharged through the exhaust end is cooled by a cooling device and then input into the hydrogenation machine through a recovery pipeline for recovery, thereby achieving cost reduction and rate increase.

[0064] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and 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 the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0065] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, object or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, object or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, object or device including the element.

[0066] The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A hydrogen charging management method for a solid-state hydrogen storage device, characterized in that: The method comprises: Connecting a hydrogenation gun to a first gas inlet end of a solid-state hydrogen storage device, and charging the solid-state hydrogen storage device with hydrogen at a preset hydrogen flow rate; Controlling the exhaust end of the solid-state hydrogen storage device to discharge the hydrogen that has undergone heat exchange; Starting the circulation pump, inputting the hydrogen discharged from the exhaust end into the cooling device through the circulation pipeline for cooling, and charging the cooled hydrogen into the solid-state hydrogen storage device through the circulation pipeline and the second air inlet end of the solid-state hydrogen storage device; The solid-state hydrogen storage material in the solid-state hydrogen storage device reaches a hydrogen absorption saturation state, and hydrogen charging stops.

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

3. The hydrogen charging management method of a solid-state hydrogen storage device according to claim 1, characterized in that: The method comprises: Obtaining the consumed hydrogen flow rate stored in the identification storage unit of the solid-state hydrogen storage device; The preset hydrogen flow rate of the solid-state hydrogen storage device is determined based on the sum of the consumed hydrogen flow rate and the corrected hydrogen flow rate.

4. The hydrogen charging management method of a solid-state hydrogen storage device according to claim 3, characterized in that: The method comprises: Obtaining the remaining hydrogen flow and the total hydrogen flow of the solid-state hydrogen storage device; Based on the residual flow rate of hydrogen and the total flow rate of hydrogen, an absolute difference is calculated to obtain the consumed hydrogen flow rate of the solid-state hydrogen storage device. The consumed hydrogen flow rate is stored in the identification storage unit of the solid-state hydrogen storage device.

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

6. A hydrogen charging management method for a solid-state hydrogen storage device according to claim 5, characterized in that: The method comprises: A temperature sensor is used to obtain the real-time temperature in the solid-state hydrogen storage device in a preset collection period.

7. The hydrogen charging management method of a solid-state hydrogen storage device according to claim 1, characterized in that: The method comprises: When the real-time temperature in the solid-state hydrogen storage device remains within the preset temperature range for longer than a preset time, it is determined that the solid-state hydrogen storage material in the solid-state hydrogen storage device has reached a hydrogen absorption saturation state, and hydrogen charging is stopped.

8. The hydrogen charging management method of a solid-state hydrogen storage device according to claim 1, characterized in that: The method comprises: When the solid-state hydrogen storage device stops charging hydrogen, the hydrogen that has undergone heat exchange is discharged from the exhaust end of the solid-state hydrogen storage device, cooled by a cooling device, and then input into a hydrogenator through a recovery pipeline for recovery.

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