Drawer-type modular solid-state hydrogen storage off-grid power supply device

Abstract

This utility model belongs to the field of off-grid power supply and solid-state hydrogen storage technology, specifically relating to a drawer-type modular solid-state hydrogen storage off-grid power supply device. The device includes a cabinet with a horizontal partition dividing the interior into upper and lower sections. The upper section serves as the main control output area, housing the main controller, DC / DC module, and lithium battery pack. The lower section has a vertically arranged heat-conducting partition, dividing it into two parts for housing the solid-state hydrogen storage drawer module and the fuel cell, respectively. The upper section has a load output interface on its side, and the lower section has ventilation holes on its side. This utility model is suitable for off-grid power supply applications requiring frequent replacement of hydrogen storage modules and alternating use in multiple scenarios.

Description

Technical Field

[0001] This utility model belongs to the field of off-grid power supply and solid-state hydrogen storage technology, specifically relating to a drawer-type modular solid-state hydrogen storage off-grid power supply device, which is particularly suitable for off-grid power supply occasions that require frequent replacement of hydrogen storage modules and alternating use in multiple scenarios. Background Technology

[0002] Off-grid power supply systems are mainly used in situations where there is no power grid coverage or the power supply from the grid is unstable, such as field construction, communication base stations in remote areas, emergency rescue equipment, and temporary power supply scenarios. These scenarios are typically characterized by complex power supply environments, limited maintenance conditions, and high requirements for continuous operation. Therefore, off-grid power supply devices not only need to have stable power generation capabilities, but also good energy storage capabilities, rapid maintenance capabilities, and on-site adaptability.

[0003] Existing off-grid power supply technologies have the following main shortcomings:

[0004] Off-grid power supply devices are widely used in areas without grid coverage, and their continuous power supply capability depends on the capacity and ease of replacement of the energy storage unit. Existing hydrogen energy storage off-grid power supply devices generally adopt an integrated structure, with the hydrogen storage tank, power generation, and control components densely integrated in the same housing. When the hydrogen storage medium is depleted or fails, the entire unit needs to be disassembled and returned to the factory for replacement. On-site replacement is not possible, which seriously affects the continuity of power supply and also consumes a lot of logistics, time, and labor costs.

[0005] Furthermore, solid-state hydrogen storage and release require external heating, and the initial startup of the system relies on the effective output of lithium batteries or photovoltaics. Under conditions such as lithium battery depletion or continuous rainy weather, the system cannot start automatically due to the lack of available power to heat the hydrogen storage tank, creating a predicament. Existing solutions lack an effective self-powered closed-loop design. Moreover, most existing solutions do not adequately utilize waste heat from fuel cells, resulting in a high degree of continuous reliance on electric heating and low energy utilization efficiency for solid-state hydrogen storage devices.

[0006] In summary, there is an urgent need for an off-grid power supply solution that allows for modular and quick-change hydrogen storage units and provides self-sufficiency in power generation. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a drawer-type modular solid-state hydrogen storage off-grid power supply device.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A drawer-type modular solid-state hydrogen storage off-grid power supply device includes: a cabinet with a horizontal partition dividing the interior into upper and lower spaces; the upper space serves as the main control output area, housing the main controller, DC / DC module, and lithium battery pack; the lower space has a vertically arranged heat-conducting partition dividing it into two parts, used for housing the solid-state hydrogen storage drawer module and the fuel cell, respectively; a load output interface is provided on the side of the upper space.

[0010] The solid hydrogen storage drawer module is internally equipped with a solid hydrogen storage device, a heating component, a phase change material heat storage layer, and a starting battery; the solid hydrogen storage device is wrapped with a phase change material heat storage layer, and the heating component is attached to the outside of the phase change material heat storage layer; the starting battery is electrically connected to the heating component.

[0011] The hydrogen generated by the solid-state hydrogen storage device enters the hydrogen pipeline, first passing through a pressure reducing valve, then through a check valve and the hydrogen interface on the fuel cell, and finally into the fuel cell.

[0012] The fuel cell is electrically connected to the DC / DC module, and the DC / DC module is connected to the lithium battery pack 7 and the load output interface to form an electrical connection circuit.

[0013] The main control unit is connected to the solid hydrogen storage device, heating components, starting battery, fuel cell, DC / DC module, lithium battery pack, load output interface, pressure reducing valve and check valve for control.

[0014] The lower part of the cabinet has ventilation holes on its side.

[0015] The solid hydrogen storage drawer module has a slide rail at the bottom of its outer shell and a corresponding slide track on the upper surface of the bottom of the cabinet. The slide rail slides within the slide track to realize the pull-out movement of the solid hydrogen storage drawer module, forming a drawer-type structure.

[0016] The solid hydrogen storage drawer module has an independent heat-insulated compartment at the top, and the starting battery is arranged inside the heat-insulated compartment.

[0017] The starting battery and heating component are connected via an electrical quick-connect interface.

[0018] The hydrogen generated by the solid-state hydrogen storage device enters the hydrogen pipeline through a self-sealing quick-connect interface.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Modular quick-change, significantly improving efficiency. This utility model encapsulates the solid hydrogen storage device within a solid hydrogen storage drawer module, which is connected to the cabinet via slide rails. When the hydrogen storage material is depleted, the module needs maintenance, or a hydrogen storage device of a different capacity needs to be replaced, the operator only needs to stop the machine and pull out the drawer module to replace the solid hydrogen storage drawer module, thus completing the disassembly of the hydrogen storage unit. This avoids the problems of traditional integrated devices that require disassembling the entire machine, disconnecting pipelines, and rewiring, significantly improving the efficiency of on-site maintenance and module replacement.

[0021] 2. Waste heat recovery coupled with phase change thermal storage significantly improves energy utilization efficiency. This invention incorporates a phase change material thermal storage layer on the outside of the solid-state hydrogen storage device, and transfers the waste heat generated during fuel cell operation to the phase change material thermal storage layer via a thermally conductive partition. The phase change material thermal storage layer absorbs and stores waste heat, releasing it when the temperature of the solid-state hydrogen storage device decreases, thereby improving the overall energy utilization efficiency of the system.

[0022] 3. This invention incorporates a start-up battery within the solid-state hydrogen storage drawer module, which provides power to the main controller and heating components during the start-up phase. Even when external power is unavailable, photovoltaic output is insufficient, or the lithium battery pack has low charge, the start-up battery can still provide initial heating to the solid-state hydrogen storage device, bringing the solid-state hydrogen storage material to its effective hydrogen release temperature range, thereby enhancing the device's autonomous start-up capability in off-grid environments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the drawer-type modular solid-state hydrogen storage off-grid power supply device of this utility model.

[0024] Figure 2 This is a schematic diagram showing the connection between the solid hydrogen storage drawer module and the fuel cell in this utility model;

[0025] In the diagram: 1 Solid-state hydrogen storage drawer module; 2 Starting battery; 3 Main controller; 4 DC / DC module; 5 Cabinet; 6 Load output interface; 7 Lithium battery pack; 8 Vent hole; 9 Fuel cell; 10 Thermal conductive partition; 11 Heating component; 12 Slide rail; 13 Insulated compartment; 14 Electrical quick-connect interface; 15 Hydrogen self-sealing quick-connect interface; 16 Hydrogen pipeline; 17 Pressure reducing valve; 18 Check valve; 19 Solid-state hydrogen storage device; 20 Phase change material heat storage layer. Detailed Implementation

[0026] The specific embodiments of this utility model are further described below with reference to the accompanying drawings and technical solutions.

[0027] like Figure 1 and Figure 2As shown, this utility model discloses a drawer-type modular solid-state hydrogen storage off-grid power supply device, comprising: a cabinet 5, wherein a horizontal partition is provided inside the cabinet 5, dividing the interior of the cabinet 5 into upper and lower spaces; wherein the upper space serves as the main control output area, and a main controller 3, a DC / DC module 4, and a lithium battery pack 7 are arranged therein; the lower space is provided with a vertically arranged heat-conducting partition 10, dividing the lower space into two parts, which are respectively used to arrange a solid-state hydrogen storage drawer module 1 and a fuel cell 9; a load output interface 6 is provided on the side of the upper space, and a vent 8 is provided on the side of the lower space.

[0028] The bottom of the solid hydrogen storage drawer module 1 is provided with a slide rail 12, and the corresponding position on the upper surface of the bottom of the cabinet 5 is provided with a slide track. The slide rail 12 slides in the slide track to realize the pull-out movement of the solid hydrogen storage drawer module 1, forming a drawer-type structure.

[0029] The solid hydrogen storage drawer module 1 is internally equipped with a solid hydrogen storage device 19, a heating component 11, a phase change material heat storage layer 20, and a starting battery 2. The solid hydrogen storage device 19 is wrapped with the phase change material heat storage layer 20, and the heating component 11 is attached to the outside of the phase change material heat storage layer 20. An independent heat insulation compartment 13 is provided in the upper part of the solid hydrogen storage drawer module 1. The starting battery 2 is arranged in the heat insulation compartment 13. The starting battery 2 and the heating component 11 are connected through an electrical quick-connect interface 14. The electrical quick-connect interface 14 is used to realize the electrical connection between the solid hydrogen storage drawer module and the cabinet.

[0030] The solid-state hydrogen storage device 19 is internally sealed and filled with a metal hydride hydrogen storage alloy material. Hydrogen is pre-activated by hydrogen charging and stored in this hydrogen storage alloy. During normal operation and hydrogen release, the hydrogen storage alloy inside the solid-state hydrogen storage device undergoes a dehydrogenation reaction upon heating, releasing hydrogen. The hydrogen generated by the solid-state hydrogen storage device 19 enters the hydrogen pipeline 16 through the hydrogen self-sealing quick-connect interface 15, first passing through the pressure reducing valve 17, then through the one-way valve 18 and the hydrogen interface on the fuel cell 9, thus entering the fuel cell 9. The hydrogen self-sealing quick-connect interface 15 is used to establish the gas path connection between the solid-state hydrogen storage device 19 and the fuel cell 9.

[0031] After the solid hydrogen storage drawer module 1 is pushed into place, the electrical quick-connect interface 14 and the hydrogen quick-connect interface 15 automatically connect synchronously, enabling tool-free quick replacement of the module without the need for manual wiring.

[0032] The starting battery 2 is used to supply power to the heating component during the off-grid startup phase; when there is no external mains power, the starting battery 2 independently supplies power to the heating component 11 to start the solid hydrogen storage device 19 to release hydrogen, and the fuel cell 9 uses the electrochemical reaction between hydrogen and oxygen to generate electrical energy.

[0033] Fuel cell 9 is electrically connected to DC / DC module 4. DC / DC module 4 is connected to lithium battery pack 7 and load output interface 6 to form an electrical connection circuit. The electrical energy output by fuel cell 9 is converted by DC / DC module 4 to achieve regulated output. Part of the electrical energy is used to charge lithium battery pack 7 for energy storage, and the other part of the electrical energy is used to drive DC / DC module 4 and load output interface 6 to achieve regulated output and complete off-grid power supply. The load output interface 6 includes any one or a combination of DC output interface and AC output interface to adapt to the power supply requirements of different types of off-grid loads.

[0034] The main control unit 3 is connected to the solid hydrogen storage device 19, heating component 11, starting battery 2, fuel cell 9, DC / DC module 4, lithium battery pack 7, load output interface 6, pressure reducing valve 17 and check valve 18 for unified control of the entire process of heating start-up, solid hydrogen release, fuel cell power generation, lithium battery energy storage, external power distribution and safety protection.

[0035] The solid hydrogen storage drawer module 1 is replaceable. When the hydrogen storage material in the solid hydrogen storage device 19 is exhausted, the solid hydrogen storage drawer module 1 can be directly replaced with a new one.

[0036] Vent 8 ensures that the fuel cell 9 has the oxygen requirement to operate and also plays a certain role in heat dissipation.

[0037] The hydrogen pipeline 16 is equipped with a one-way valve 18 and a pressure reducing valve 17 to ensure that hydrogen can only flow from the solid hydrogen storage device 19 to the fuel cell 9, and backflow is strictly prohibited, thus protecting the hydrogen storage material, fuel cell, and pipeline interface. The pressure reducing valve 17 is used to stabilize the inlet pressure of the fuel cell.

[0038] The thermally conductive partition 10 is used to facilitate the transfer of heat generated by the fuel cell 9 to the solid hydrogen storage drawer module 1. The waste heat generated when the fuel cell 9 is working is conducted to the phase change material heat storage layer 20 via the thermally conductive partition 10 for reuse.

[0039] The phase change material (PCM) heat storage layer 20 utilizes the PCM's properties of absorbing and storing heat when heated and releasing heat and maintaining temperature when cooled, thereby reducing continuous dependence on external electric heating. Furthermore, the PCM temperature of the PCM heat storage layer 20 is selected within the effective hydrogen release temperature range of the solid hydrogen storage material, precisely matching the waste heat temperature zone of the fuel cell 9 and the hydrogen release requirements of the solid hydrogen storage device 19. This allows the device to maintain its temperature through the release of latent heat from the PCM when no heating components are available.

[0040] Horizontal partitions are used for heat insulation, ensuring the lifespan of the lithium battery pack.

[0041] By adopting the above technical solution and using a drawer-type structure design, the sliding rail movement and modular design enable quick replacement, which saves resources, protects the device components, and facilitates maintenance and inspection.

[0042] In use, first push the solid hydrogen storage drawer module 1 into the corresponding drawer slot along the slide rail 12 inside the cabinet 5. The electrical quick-connect interface 14 and the hydrogen self-sealing quick-connect interface 15 are then connected.

[0043] During the initial heating phase, the main controller 3 controls the starting battery 2 to supply power to the heating assembly 11. The heating assembly 11 heats the solid hydrogen storage device 19, gradually raising the temperature of the solid hydrogen storage material to the effective hydrogen release temperature range.

[0044] After the solid hydrogen storage device 19 reaches the hydrogen release temperature, the solid hydrogen storage material releases hydrogen gas. The released hydrogen gas enters the hydrogen pipeline 16 through the hydrogen self-sealing quick-connect interface 15, and then passes through the pressure reducing valve 17 and the one-way valve 18 in sequence, and finally enters the fuel cell 9.

[0045] Hydrogen gas enters fuel cell 9, which generates electricity through an electrochemical reaction between the hydrogen and oxygen in the air. The electrical energy output from fuel cell 9 is converted by DC / DC module 4; part of the energy is supplied to an external load, and the other part is used to charge lithium battery pack 7. Lithium battery pack 7 provides auxiliary power to the system control loop when the output of fuel cell 9 is insufficient or during startup.

[0046] During the operation of fuel cell 9, the waste heat generated is transferred to phase change material heat storage layer 20 via thermally conductive partition 10. Phase change material heat storage layer 20 absorbs and stores the waste heat, and releases the heat when the temperature of solid hydrogen storage device 19 decreases, thereby slowing down the cooling rate of solid hydrogen storage device 19 and reducing the continuous power supply requirement of heating component 11.

[0047] When the hydrogen storage in the solid hydrogen storage device 19 is insufficient or needs to be replaced, the main control unit 3 controls the solid hydrogen storage device 19 to gradually exit the hydrogen release state. After the fuel cell 9 completes the shutdown process, the operator can pull out the solid hydrogen storage drawer module along the slide rail for new modular replacement.

Claims

1. A drawer-type modular solid-state hydrogen storage off-grid power supply device, characterized in that, The drawer-type modular solid-state hydrogen storage off-grid power supply device includes: a cabinet (5), which is equipped with a horizontal partition to divide the interior of the cabinet (5) into upper and lower spaces; the upper space serves as the main control output area, where a main controller (3), a DC / DC module (4) and a lithium battery pack (7) are arranged; the lower space is equipped with a vertically arranged heat-conducting partition (10) to divide the lower space into two parts, which are used to arrange the solid-state hydrogen storage drawer module (1) and the fuel cell (9) respectively; the upper space is equipped with a load output interface (6) on the side. The solid hydrogen storage drawer module (1) is equipped with a solid hydrogen storage device (19), a heating component (11), a phase change material heat storage layer (20), and a starting battery (2) inside. The solid hydrogen storage device (19) is wrapped with a phase change material heat storage layer (20), and the heating component (11) is attached to the outside of the phase change material heat storage layer (20). The starting battery (2) is electrically connected to the heating component (11). The hydrogen generated by the solid hydrogen storage device (19) enters the hydrogen pipeline (16), first through the pressure reducing valve (17), then through the one-way valve (18) and the hydrogen interface on the fuel cell (9), and then enters the fuel cell (9).

2. The drawer-type modular solid-state hydrogen storage off-grid power supply device according to claim 1, characterized in that, The fuel cell (9) is electrically connected to the DC / DC module (4), and the DC / DC module (4) is connected to the lithium battery pack (7) and the load output interface (6) to form an electrical connection circuit. The main controller (3) is connected to the solid hydrogen storage device (19), the heating component (11), the starting battery (2), the fuel cell (9), the DC / DC module (4), the lithium battery pack (7), the load output interface (6), the pressure reducing valve (17), and the one-way valve (18) for control.

3. The drawer-type modular solid-state hydrogen storage off-grid power supply device according to claim 1, characterized in that, The upper space of the cabinet (5) is provided with a load output interface (6) on the side, and the lower space is provided with a ventilation hole (8) on the side.

4. The drawer-type modular solid-state hydrogen storage off-grid power supply device according to claim 1, characterized in that, The bottom of the shell of the solid hydrogen storage drawer module (1) is provided with a slide rail (12), and the corresponding position of the bottom upper surface of the cabinet (5) is provided with a slide rail (12). The slide rail (12) slides in the slide rail to realize the pull-out movement of the solid hydrogen storage drawer module (1) and form a drawer structure.

5. The drawer-type modular solid-state hydrogen storage off-grid power supply device according to claim 1, characterized in that, The solid hydrogen storage drawer module (1) has an independent heat insulation chamber (13) in the upper part, and the starting battery (2) is arranged in the heat insulation chamber (13).

6. The drawer-type modular solid-state hydrogen storage off-grid power supply device of claim 1, wherein, The starting battery (2) and the heating assembly (11) are connected via an electrical quick-connect interface (14).

7. The drawer-type modular solid-state hydrogen storage off-grid power supply device of claim 1, wherein, The hydrogen generated by the solid hydrogen storage device (19) enters the hydrogen pipeline (16) through the hydrogen self-sealing quick-connect interface (15).

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