A built-in heat exchange type solid-state metal hydrogen storage device

Abstract

The utility model discloses a kind of built-in heat exchange type solid-state metal hydrogen storage devices, it is related to hydrogen storage equipment technical field, specifically a kind of built-in heat exchange type solid-state metal hydrogen storage device, including tank body, double circulation liquid component, temperature control component, hydrogen storage component, the hydrogen storage component includes hydrogen storage alloy element, two support frame, multiple positioning rods;Through the cooperation setting of tank body, double circulation liquid component, temperature control component, hydrogen storage component, make this a kind of built-in heat exchange type solid-state metal hydrogen storage device has the effect of high efficient hydrogen storage, high efficient hydrogen release, by setting built-in heat exchange coil pipe and double circulation liquid component, the heat generated in the hydrogen storage process can be quickly exported or the heat required in hydrogen release process is imported, effectively control the temperature inside hydrogen storage tank.Compared with prior art, the heat exchange efficiency of the utility model is significantly improved, the hydrogen storage and hydrogen release process can be completed in shorter time, greatly improve the working efficiency of hydrogen storage device.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen storage equipment technology, specifically to an internal heat exchange solid metal hydrogen storage device. Background Technology

[0002] With the progress of modern society and economic development, the demand for energy is increasing day by day. Traditional fossil fuels, represented by oil, coal, and natural gas, are non-renewable energy sources and face the dilemma of gradual depletion. Hydrogen energy, due to its high calorific value, zero emissions, and its potential as a carrier for high-density energy storage, has attracted widespread attention from researchers and investors worldwide. There are three main methods of hydrogen storage: high-pressure gaseous hydrogen storage, liquid hydrogen storage, and solid-state hydrogen storage. The main disadvantages of high-pressure gaseous hydrogen storage are its low hydrogen storage density and significant safety hazards. Although liquid hydrogen has a high hydrogen storage density, the energy consumed in the hydrogen liquefaction process is very large. The energy consumed in hydrogen liquefaction (21K) is equivalent to one-third of the energy of the liquefied hydrogen, and there are also safety issues related to the vaporization of liquid hydrogen. Solid-state hydrogen storage materials, on the other hand, have advantages such as high hydrogen storage density and high safety and efficiency. Therefore, solid-state hydrogen storage has become the most active hydrogen storage technology in current hydrogen energy research.

[0003] Solid hydrogen storage materials, such as metal hydrides, generate heat during hydrogen absorption and desorption, and also undergo expansion and contraction. This stress impacts the internal structure of the tank, and if the hydrogen storage material is not evenly distributed, stress concentration can damage the internal structure. For example, patent CN111188988B discloses a solid hydrogen storage device with high heat exchange characteristics. This device solves the problem of stress concentration damaging the internal structure by using multiple hydrogen storage cylinders and heat-conducting baffles to ensure uniform distribution of the hydrogen storage material. It also improves heat dissipation efficiency by incorporating heat transfer fins and other structures. However, this device still has limitations in practical applications. Its heat exchange efficiency needs further improvement, and its ability to precisely control the temperature during hydrogen storage is insufficient, making it difficult to meet the needs of applications with high temperature requirements during hydrogen storage. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an internally heated solid metal hydrogen storage device, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an internal heat exchange solid metal hydrogen storage device, comprising a tank, a dual-circulation liquid component, a temperature control component, and a hydrogen storage component. The hydrogen storage component includes a hydrogen storage alloy element, two support frames, and multiple positioning rods. Each support frame is fixedly installed on the inner side wall of the tank. The two ends of each positioning rod are fixedly installed to the two support frames, and the positioning rods are parallel to each other. The hydrogen storage alloy element is fixedly installed on each positioning rod. The dual-circulation liquid component includes a heat exchange coil, a first conveying component, and a second conveying component. The heat exchange coil is fixedly installed on the inner side wall of the tank. The media outlet of the first conveying component is connected to the media inlet of the heat exchange coil. The media inlet of the first conveying component is connected to the media outlet of the heat exchange coil. The medium outlet of the heat exchange coil is connected; the medium outlet of the second conveying component is connected to the medium inlet of the heat exchange coil, and the medium inlet of the second conveying component is connected to the medium outlet of the heat exchange coil; the first conveying component and the second conveying component respectively convey fluid medium into the heat exchange coil; the temperature control component is respectively connected to the first conveying component and the second conveying component, and the temperature control component respectively controls the rise and fall of the fluid medium temperature inside the first conveying component and the second conveying component; when the first conveying component conveys low-temperature fluid medium into the heat exchange coil, the low-temperature fluid medium absorbs heat from inside the tank, reducing the temperature and pressure inside the tank; when the second conveying component conveys high-temperature fluid medium into the heat exchange coil, the high-temperature fluid medium transfers heat to inside the tank, increasing the temperature and pressure inside the tank.

[0008] Optionally, a tank flange is fixedly installed at one end of the tank body, and a quick-opening blind flange is fixedly installed on the tank flange; a pressure gauge is fixedly installed on the tank body; and a hydrogen inlet / outlet pipe is fixedly installed at the other end of the tank body, and the two are connected.

[0009] Optionally, the first conveying assembly includes a cold liquid tank, a condenser, and a first conveying pump. The condenser is fixedly installed on the cold liquid tank and cools the fluid medium inside the cold liquid tank. The medium inflow end of the cold liquid tank is connected to the medium outflow end of the heat exchange coil. The medium outflow end of the cold liquid tank is fixedly installed and connected to the medium inflow end of the first conveying pump. The medium outflow end of the first conveying pump is connected to the medium inflow end of the heat exchange coil. The second conveying assembly includes a hot liquid tank, a heater, and a second conveying pump. The heater is fixedly installed on the hot liquid tank and heats the fluid medium inside the hot liquid tank. The medium inflow end of the hot liquid tank is connected to the medium outflow end of the heat exchange coil. The medium outflow end of the hot liquid tank is fixedly installed and connected to the medium inflow end of the second conveying pump. The medium outflow end of the second conveying pump is connected to the medium inflow end of the heat exchange coil.

[0010] Optionally, the temperature control component includes a control element, a first temperature sensor, a second temperature sensor, and a third temperature sensor. The first temperature sensor is fixedly installed inside the tank body, the second temperature sensor is fixedly installed inside the cold liquid tank, and the third temperature sensor is fixedly installed inside the hot liquid tank.

[0011] Optionally, the control unit is a programmable logic controller, which is electrically connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the first delivery pump, the condenser, the second delivery pump, and the heater.

[0012] Optionally, the control unit includes a first temperature controller, a second temperature controller, and a third temperature controller. The first temperature controller is electrically connected to a first temperature sensor, a first delivery pump, and a second delivery pump, respectively. The second temperature controller is electrically connected to a second temperature sensor and a condenser, respectively. The third temperature controller is electrically connected to a third temperature sensor and a heater, respectively.

[0013] An application method for an internally heated solid metal hydrogen storage device includes the following steps: Step 1, temperature control: The internal temperature of the tank is detected by a first temperature sensor, and the first temperature sensor transmits the detected temperature signal to the control unit.

[0014] The temperature control unit maintains the temperature of the fluid medium in the coolant tank between 15 and 25°C. When the temperature of the fluid medium in the coolant tank is higher than 25°C, the condenser is started by the control unit. When the temperature of the fluid medium in the coolant tank is lower than 15°C, the condenser is shut down by the control unit.

[0015] The temperature control component maintains the temperature of the fluid medium inside the hot liquid tank between 50 and 60°C. When the temperature of the fluid medium inside the hot liquid tank is below 50°C, the heater is started by the control component. When the temperature of the fluid medium inside the hot liquid tank is above 60°C, the heater is shut down by the control component.

[0016] Step 2: Test the airtightness of the tank: After sealing the quick-opening blind flange, introduce nitrogen gas at 5 MPa into the tank and maintain the pressure for 6 hours. If the pressure drop in the tank does not exceed 0.02 MPa after 6 hours, it proves that the airtightness of the tank is qualified.

[0017] Step 3, during hydrogen storage: Hydrogen is introduced into the tank through the hydrogen inlet and outlet pipes, and the internal pressure of the tank is controlled at 5 MPa. When the internal temperature of the tank exceeds 30°C, the temperature control unit starts the first delivery pump. The first delivery pump delivers the low-temperature fluid medium in the cold liquid tank to the heat exchange coil. The low-temperature fluid medium absorbs heat during its flow in the heat exchange coil, and the internal temperature of the tank decreases. After the internal temperature and pressure of the tank no longer change, the hydrogen filling ends, and the temperature control unit shuts down the first delivery pump.

[0018] Step 4, during hydrogen release: Hydrogen gas inside the tank is released through the hydrogen inlet and outlet pipes. When the internal pressure of the tank is lower than 1 MPa, the second delivery pump is started by controlling the temperature control component. The second delivery pump delivers the high-temperature fluid medium in the hydrothermal tank to the heat exchange coil. The high-temperature fluid medium releases heat during its flow in the heat exchange coil, and the internal temperature of the tank rises. When the internal pressure of the tank is lower than atmospheric pressure, hydrogen release is complete, and the temperature control component shuts down the second delivery pump.

[0019] (III) Beneficial Effects

[0020] This invention provides an internally heat-dissipating solid metal hydrogen storage device, which has the following advantages:

[0021] 1. This internally heated solid metal hydrogen storage device, through the coordinated arrangement of a tank, dual circulating liquid components, a temperature control component, and a hydrogen storage component, achieves efficient hydrogen storage and release. By incorporating an internally heated heat exchange coil and dual circulating liquid components, it can quickly remove heat generated during hydrogen storage or introduce heat required for hydrogen release, effectively controlling the internal temperature of the hydrogen storage tank. Heat released during hydrogen storage is rapidly removed, and preheating is performed before hydrogen release, accelerating the process. Compared to existing technologies, this invention significantly improves heat exchange efficiency, enabling the completion of hydrogen storage and release processes in a shorter time, greatly enhancing the working efficiency of the hydrogen storage device. For example, during hydrogen storage, when the internal temperature of the tank exceeds a set value, the temperature control component can quickly activate the first delivery pump, transporting the low-temperature fluid medium from the cold liquid tank to the heat exchange coil, rapidly absorbing heat from the tank and quickly lowering the temperature. This avoids problems such as decreased performance of the hydrogen storage alloy due to excessively high temperatures, thus ensuring the efficient operation of the hydrogen storage process. During hydrogen release, a second transfer pump delivers the high-temperature fluid medium from the hydrothermal tank to the heat exchange coil, rapidly increasing the internal temperature of the tank, promoting hydrogen release, and improving hydrogen release efficiency. This efficient heat exchange method allows the hydrogen storage device to better adapt to different working environments and needs, and has broader application prospects.

[0022] 2. This internally heated solid metal hydrogen storage device, through the coordinated arrangement of a tank, dual-circulation liquid components, a temperature control component, and a hydrogen storage component, achieves precise temperature control. This invention utilizes multiple temperature sensors and controllers within the temperature control component to monitor the temperature inside the tank, as well as in the cold and hot liquid tanks, in real time, and precisely control the temperature of the fluid medium as needed. This precise temperature control capability allows the hydrogen storage device to operate under optimal temperature conditions, improving the service life and storage efficiency of the hydrogen storage alloy. For example, the first temperature sensor monitors the internal temperature of the tank in real time and transmits the signal to the controller. The controller precisely controls the start and stop of the first and second delivery pumps according to the set temperature range, thereby achieving precise control of the internal temperature of the tank. Simultaneously, the second and third temperature sensors monitor the temperatures in the cold and hot liquid tanks respectively, and the second and third temperature controllers control the start and stop of the condenser and heater, ensuring that the temperature of the fluid medium in the cold and hot liquid tanks remains within the set range. This precise temperature control system not only ensures the safety and reliability of the hydrogen storage process, but also allows for flexible adjustment of the temperature control strategy based on different hydrogen storage alloy materials and operating requirements, further improving the performance and adaptability of the hydrogen storage device. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a partial cross-sectional view of an internal heat exchange solid metal hydrogen storage device according to the present invention.

[0025] Figure 2 This is a cross-sectional view of an internal heat exchange solid metal hydrogen storage device according to the present invention. Figure 1 Schematic diagram of the structure of (AA);

[0026] Figure 3 This is a schematic diagram of the pipeline connection structure of the temperature control component and the dual circulating liquid component in an internal heat exchange solid metal hydrogen storage device of this utility model.

[0027] In the diagram: 1. Quick-opening blind flange; 2. Tank flange; 3. Support frame; 4. Fastening bolts; 5. Positioning rod; 6. Heat exchange coil; 7. Dual circulation liquid components; 701. First three-way valve; 702. First check valve; 703. Second check valve; 704. First transfer pump; 705. Second transfer pump; 706. Cold liquid tank; 707. Condenser; 708. Hot liquid tank; 709. Heater; 710. Third check valve; 711. 712. Fourth check valve; 713. Second three-way valve; 8. Pressure gauge; 9. Temperature control component; 901. First temperature controller; 902. First temperature sensor; 903. Second temperature controller; 904. Second temperature sensor; 905. Third temperature controller; 906. Third temperature sensor; 10. Liquid inlet; 11. Liquid outlet; 12. Tank body; 13. Hydrogen storage alloy element; 14. Hydrogen inlet and outlet pipes; 15. Support base. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying anything.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0030] Please see Figures 1 to 3This utility model provides a technical solution: an internal heat exchange solid metal hydrogen storage device, comprising a tank 12, a dual circulation liquid component 7, a temperature control component 9, and a hydrogen storage component. The hydrogen storage component includes a hydrogen storage alloy element 13, two support frames 3, and multiple positioning rods 5. Each support frame 3 is fixedly installed on the inner side wall of the tank 12. The two ends of each positioning rod 5 are fixedly installed to the two support frames 3 respectively. Specifically, the positioning rods 5 are fixedly installed to the support frames 3 by fastening bolts 4. The positioning rods 5 are parallel to each other, and the hydrogen storage alloy element 13 is fixedly installed on each positioning rod 5.

[0031] The hydrogen storage alloy element 13 is used to absorb and release hydrogen. It is mainly made of hydrogen storage alloy and polymer (such as PVP) bonded together, and has good hydrogen storage performance and mechanical strength. The support frame 3 and positioning rod 5 are used to support and fix the hydrogen storage alloy element 13, avoiding structural damage caused by stress concentration, thereby improving the safety and reliability of the hydrogen storage device.

[0032] The dual-circulation liquid component 7 includes a heat exchange coil 6, a first conveying assembly, and a second conveying assembly. The heat exchange coil 6 is fixedly installed on the inner wall of the tank 12. The media outlet of the first conveying assembly is connected to the media inlet of the heat exchange coil 6, and the media inlet of the first conveying assembly is connected to the media outlet of the heat exchange coil 6. The media outlet of the second conveying assembly is connected to the media inlet of the heat exchange coil 6, and the media inlet of the second conveying assembly is connected to the media outlet of the heat exchange coil 6. The first and second conveying assemblies respectively convey fluid media into the heat exchange coil 6.

[0033] Temperature control component 9 is connected to the first conveying component and the second conveying component respectively, and controls the rise and fall of the internal fluid medium temperature of the first conveying component and the second conveying component respectively.

[0034] When the first conveying component delivers the cryogenic fluid medium into the heat exchange coil 6, the cryogenic fluid medium absorbs heat from inside the tank 12, reducing the internal temperature and pressure of the tank 12. This avoids problems such as the degradation of the hydrogen storage alloy performance due to excessively high temperatures, thereby ensuring the efficient operation of the hydrogen storage process.

[0035] When the second conveying component delivers a high-temperature fluid medium into the heat exchange coil 6, the high-temperature fluid medium transfers heat to the inside of the tank 12, increasing the temperature and pressure inside the tank 12, promoting the release of hydrogen, and improving the hydrogen release efficiency.

[0036] The tank 12 is used to house the hydrogen storage alloy element 13 and hydrogen gas. The heat exchange coil 6 is used to exchange heat with the internal temperature of the tank 12 through a fluid medium, thereby controlling the internal temperature of the tank 12.

[0037] Specifically, a tank flange 2 is fixedly installed at one end of the tank body 12, and a quick-opening blind flange 1 is fixedly installed on the tank flange 2. A pressure gauge 8 is fixedly installed on the tank body 12; a hydrogen inlet / outlet pipe 14 is fixedly installed at the other end of the tank body 12, and the two are connected.

[0038] The pressure gauge 8 is used to monitor the pressure inside the tank 12, accurately reflecting pressure changes and providing crucial information for safe control of the hydrogen storage process. Through the monitoring of the pressure gauge 8, operators can promptly detect abnormal pressure conditions and take appropriate measures to ensure the safe operation of the hydrogen storage device. The quick-opening blind flange 1 is used for rapid sealing and opening of the tank 12. A fluororubber sealing ring is used to seal the quick-opening blind flange 1 to the tank flange 2, and a mechanical structure is used to achieve the sealing connection. The design of the quick-opening blind flange 1 makes maintenance and repair of the hydrogen storage device more convenient and faster, improving the operability and maintenance efficiency of the device. The hydrogen inlet / outlet pipe 14 is used to fill or discharge hydrogen into the tank 12. Hydrogen filling and discharging can be achieved by controlling the valves of the hydrogen inlet / outlet pipe 14. During the hydrogen storage process, hydrogen is filled into the tank 12 through the hydrogen inlet / outlet pipe 14. When the internal pressure of the tank 12 reaches the set value, hydrogen filling stops. During the hydrogen release process, the hydrogen inside the tank 12 is released through the hydrogen inlet / outlet pipe 14. When the pressure inside the tank 12 is lower than the set value, the hydrogen release stops.

[0039] Specifically, the first delivery assembly includes a cold liquid tank 706, a condenser 707, and a first delivery pump 704. The condenser 707 is fixedly installed on the cold liquid tank 706 and cools the fluid medium inside the cold liquid tank 706. The medium inflow end of the cold liquid tank 706 is connected to the medium outflow end of the heat exchange coil 6. The medium outflow end of the cold liquid tank 706 is fixedly installed and connected to the medium inflow end of the first delivery pump 704. The medium outflow end of the first delivery pump 704 is connected to the medium inflow end of the heat exchange coil 6. The second conveying assembly includes a hot liquid tank 708, a heater 709, and a second conveying pump 705. The heater 709 is fixedly installed on the hot liquid tank 708 and heats the fluid medium inside the hot liquid tank 708. The medium inflow end of the hot liquid tank 708 is connected to the medium outflow end of the heat exchange coil 6. The medium outflow end of the hot liquid tank 708 is fixedly installed and connected to the medium inflow end of the second conveying pump 705. The medium outflow end of the second conveying pump 705 is connected to the medium inflow end of the heat exchange coil 6.

[0040] In this system, the fluid medium in the cold liquid tank 706 is cooled by the condenser 707 to ensure its temperature remains within a set range. The condenser 707 includes, but is not limited to, equipment currently available on the market for cooling fluid media. When the internal temperature of the tank 12 is too high, the first delivery pump 704 starts, delivering the low-temperature fluid medium from the cold liquid tank 706 to the heat exchange coil 6. During its flow within the heat exchange coil 6, the fluid medium absorbs heat from the tank 12, thereby lowering its internal temperature. The second delivery assembly delivers a high-temperature fluid medium to the heat exchange coil 6 to increase the internal temperature of the tank 12. The fluid medium in the hot liquid tank 708 is heated by the heater 709 to ensure its temperature remains within a set range. When hydrogen release is required, the internal pressure of the tank 12 decreases, and the second delivery pump 705 starts, delivering the high-temperature fluid medium from the hot liquid tank 708 to the heat exchange coil 6. During its flow within the heat exchange coil 6, the fluid medium releases heat, thereby raising the internal temperature of the tank 12 and promoting hydrogen release.

[0041] More specifically, the temperature control component 9 includes a control unit, a first temperature sensor 902, a second temperature sensor 904, and a third temperature sensor 906. The first temperature sensor 902 is fixedly installed inside the tank 12, the second temperature sensor 904 is fixedly installed inside the cold liquid tank 706, and the third temperature sensor 906 is fixedly installed inside the hot liquid tank 708. The control unit employs a programmable logic controller (PLC), which is electrically connected to the first temperature sensor 902, the second temperature sensor 904, the third temperature sensor 906, the first transfer pump 704, the condenser 707, the second transfer pump 705, and the heater 709, and also includes communication connections.

[0042] The system includes a first temperature sensor 902 for real-time monitoring of the internal temperature of tank 12 and transmitting the signal to the controller. A second temperature sensor 904 monitors the temperature of the fluid medium in cold liquid tank 706 and transmits the signal to the controller. A third temperature sensor 906 monitors the temperature of the fluid medium in hot liquid tank 708 and transmits the signal to the controller. Based on the signals from each temperature sensor, the controller precisely controls the start and stop of the first transfer pump 704, the second transfer pump 705, the condenser 707, and the heater 709, thereby achieving precise control of the internal temperature of tank 12. For example, based on the signal from the second temperature sensor 904, the controller controls the start and stop of the condenser 707 to ensure that the temperature of the fluid medium in cold liquid tank 706 remains within a set range. Based on the signal from the third temperature sensor 906, the controller controls the start and stop of the heater 709 to ensure that the temperature of the fluid medium in hot liquid tank 708 remains within a set range. When the control unit adopts a programmable logic controller, the control unit is equipped with software programs such as logic control program and timing control program to meet the needs of signal processing, data transmission and automatic control of electrical equipment.

[0043] More specifically, the control components include a first temperature controller 901, a second temperature controller 903, and a third temperature controller 905. However, in actual implementation, the control components may also use the first temperature controller 901, the second temperature controller 903, and the third temperature controller 905. The first temperature controller 901 is electrically connected to the first temperature sensor 902, the first delivery pump 704, and the second delivery pump 705, respectively.

[0044] In this process, after detecting the temperature, the first temperature sensor 902 transmits the corresponding control command signal to the first temperature controller 901. In response to the first temperature sensor 902, the first temperature controller 901 controls the start of the first delivery pump 704 or the second delivery pump 705.

[0045] The second temperature controller 903 is electrically connected to the second temperature sensor 904 and the condenser 707, respectively.

[0046] The output of the second temperature sensor 904 is connected to the input of the second temperature controller 903 to transmit the detected temperature signal. The second temperature sensor 904 is typically connected to the second temperature controller 903 via a specific interface or wiring, such as the signal lines of thermocouples or resistance temperature detectors (RTDs) connected to the corresponding input terminals of the second temperature controller 903. The output of the second temperature controller 903 is connected to the control terminal of the condenser 707 to control its opening and closing. Typically, the second temperature controller 903 is connected to the condenser 707 via intermediate devices such as relays or solid-state relays to control the condenser 707. For example, the output signal of the second temperature controller 903 can control the on / off state of the solid-state relay, thereby controlling the operating state of the condenser 707.

[0047] The third temperature controller 905 is electrically connected to the third temperature sensor 906 and the heater 709, and its working principle is the same as that described above.

[0048] A first three-way valve 701 is installed at the medium inlet end (i.e., liquid inlet 10) of the heat exchange coil 6, and the two are connected. The two inlet ends of the first three-way valve 701 are respectively connected to the medium outlet ends of the first transfer pump 704 and the second transfer pump 705. Furthermore, a first check valve 702 is installed at the medium outlet end of the first transfer pump 704, and a second check valve 703 is installed at the medium outlet end of the second transfer pump 705.

[0049] A second three-way valve 712 is installed at the medium outlet (i.e., liquid outlet 11) of the heat exchange coil 6, and the two are connected. The two outlets of the second three-way valve 712 are connected to the medium inflow ends of the cold liquid tank 706 and the hot liquid tank 708, respectively. Furthermore, a third check valve 710 is installed at the medium inflow end of the cold liquid tank 706; a fourth check valve 711 is installed at the medium inflow end of the hot liquid tank 708. A support base 15 is fixedly installed below the tank body 12. The check valves are used to prevent backflow of the fluid medium. The use of three-way valves reduces the number of delivery pipelines and lowers pipeline costs.

[0050] The application method of this internally purged solid metal hydrogen storage device includes the following steps:

[0051] Step 1, Temperature Control: The internal temperature of the tank 12 is detected by the first temperature sensor 902, and the first temperature sensor 902 transmits the detected temperature signal to the control unit.

[0052] Temperature control component 9 controls the temperature of the fluid medium in the coolant tank 706 to be between 15 and 25°C; when the temperature of the fluid medium in the coolant tank 706 is higher than 25°C, the condenser 707 is started by the control component; when the temperature of the fluid medium in the coolant tank 706 is lower than 15°C, the condenser 707 is shut down by the control component.

[0053] Temperature control component 9 controls the temperature of the fluid medium in the hot liquid tank 708 to be between 50 and 60°C; when the temperature of the fluid medium in the hot liquid tank 708 is below 50°C, the heater 709 is started by the control component; when the temperature of the fluid medium in the hot liquid tank 708 is above 60°C, the heater 709 is turned off by the control component.

[0054] Step 2: Test the airtightness of tank 12: After sealing the quick-opening blind flange 1, introduce 5MPa of nitrogen into tank 12 and maintain the pressure for 6 hours. If the pressure drop in tank 12 does not exceed 0.02MPa after 6 hours, it proves that the airtightness of tank 12 is qualified.

[0055] Step 3, during hydrogen storage: Hydrogen is introduced into the tank 12 through the hydrogen inlet / outlet pipe 14, and the internal pressure of the tank 12 is controlled at 5 MPa. When the internal temperature of the tank 12 exceeds 30°C, the temperature control component 9 controls the start of the first delivery pump 704. The first delivery pump 704 delivers the cryogenic fluid medium from the cold liquid tank 706 to the heat exchange coil 6. The cryogenic fluid medium absorbs heat during its flow in the heat exchange coil 6, and the internal temperature of the tank 12 decreases. After the internal temperature and pressure of the tank 12 no longer change, the hydrogen filling ends, and the temperature control component 9 controls the shutdown of the first delivery pump 704.

[0056] Step 4, during hydrogen release: Hydrogen gas is released from inside tank 12 through hydrogen inlet / outlet pipe 14. When the internal pressure of tank 12 is lower than 1 MPa, the second transfer pump 705 is started under the control of temperature control component 9. The second transfer pump 705 transports the high-temperature fluid medium in hydrothermal tank 708 to heat exchange coil 6. The high-temperature fluid medium releases heat during its flow in heat exchange coil 6, causing the internal temperature of tank 12 to rise. When the internal pressure of tank 12 is lower than atmospheric pressure, hydrogen release is complete, and temperature control component 9 shuts down the second transfer pump 705.

[0057] During use, hydrogen is first introduced into the tank 12 through the hydrogen inlet / outlet pipe 14, gradually increasing the internal pressure. When the internal temperature of the tank 12 exceeds a set value, the first temperature sensor 902 in the temperature control component 9 detects the temperature signal and transmits it to the controller. The controller then activates the first delivery pump 704 based on the signal, delivering the cryogenic fluid medium from the coolant tank 706 to the heat exchange coil 6. As the cryogenic fluid medium flows within the heat exchange coil 6, it absorbs heat from inside the tank 12, thereby lowering the internal temperature of the tank 12.

[0058] Simultaneously, the second temperature sensor 904 monitors the temperature of the fluid medium inside the coolant tank 706. When the temperature exceeds the set value, the controller activates the condenser 707 to cool the fluid medium inside the coolant tank 706; when the temperature falls below the set value, the controller shuts off the condenser 707, ensuring that the temperature of the fluid medium inside the coolant tank 706 remains within the set range. In this way, the hydrogen storage device can operate under optimal temperature conditions, avoiding problems such as performance degradation of the hydrogen storage alloy due to excessively high temperatures, thus ensuring the efficient operation of the hydrogen storage process.

[0059] During hydrogen release, when hydrogen release is required, the hydrogen inside the tank 12 is released through the hydrogen inlet / outlet pipe 14, and the internal pressure of the tank 12 gradually decreases. When the internal pressure of the tank 12 is lower than the set value, the first temperature sensor 902 in the temperature control component 9 detects the temperature signal and transmits it to the control unit. The control unit starts the second delivery pump 705 according to the signal, and delivers the high-temperature fluid medium in the hydrothermal tank 708 to the heat exchange coil 6. The high-temperature fluid medium releases heat during its flow in the heat exchange coil 6, thereby increasing the internal temperature of the tank 12 and promoting the release of hydrogen.

[0060] Simultaneously, a third temperature sensor 906 monitors the temperature of the fluid medium inside the hydrothermal tank 708. When the temperature is lower than the set value, the controller activates the heater 709 to heat the fluid medium inside the hydrothermal tank 708; when the temperature is higher than the set value, the controller shuts off the heater 709, ensuring that the temperature of the fluid medium inside the hydrothermal tank 708 is always maintained within the set range. In this way, the hydrogen storage device can perform hydrogen release operations under optimal temperature conditions, improving hydrogen release efficiency and ensuring the smooth progress of the hydrogen release process.

[0061] Throughout the hydrogen storage and release process, pressure gauge 8 monitors the internal pressure of tank 12 in real time, providing crucial pressure information to operators. In case of abnormal pressure, operators can take timely and appropriate measures to ensure the safe operation of the hydrogen storage unit. Furthermore, the quick-opening blind flange 1 design makes maintenance and repair of the hydrogen storage unit more convenient and efficient, improving the unit's operability and maintenance efficiency.

[0062] In summary, the internal heat exchange solid metal hydrogen storage device of this invention achieves efficient, safe and reliable operation of the hydrogen storage process through the synergistic effect of its various components, and has broad application prospects.

[0063] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An internally heat-dissipating solid metal hydrogen storage device, characterized in that: Includes tank (12), dual circulation liquid components (7), temperature control components (9), and hydrogen storage components. The hydrogen storage component includes a hydrogen storage alloy element (13), two support frames (3), and multiple positioning rods (5). Each support frame (3) is fixedly installed on the inner side wall of the tank (12). The two ends of each positioning rod (5) are fixedly installed on the two support frames (3) respectively. Each positioning rod (5) is parallel to each other. The hydrogen storage alloy element (13) is fixedly installed on each positioning rod (5). The dual-circulation liquid component (7) includes a heat exchange coil (6), a first conveying component, and a second conveying component. The heat exchange coil (6) is fixedly installed on the inner wall of the tank (12). The media outlet of the first conveying component is connected to the media inlet of the heat exchange coil (6), and the media inlet of the first conveying component is connected to the media outlet of the heat exchange coil (6). The media outlet of the second conveying component is connected to the media inlet of the heat exchange coil (6), and the media inlet of the second conveying component is connected to the media outlet of the heat exchange coil (6). The first conveying component and the second conveying component respectively convey fluid media into the heat exchange coil (6). The temperature control component (9) is connected to the first conveying component and the second conveying component respectively, and the temperature control component (9) controls the rise and fall of the internal fluid medium temperature of the first conveying component and the second conveying component respectively; When the first conveying component conveys a low-temperature fluid medium into the heat exchange coil (6), the low-temperature fluid medium absorbs heat from the inside of the tank (12), reducing the temperature and pressure inside the tank (12); when the second conveying component conveys a high-temperature fluid medium into the heat exchange coil (6), the high-temperature fluid medium transfers heat to the inside of the tank (12), increasing the temperature and pressure inside the tank (12).

2. The internal heat exchange solid metal hydrogen storage device according to claim 1, characterized in that: A tank flange (2) is fixedly installed at one end of the tank body (12), and a quick-opening blind flange (1) is fixedly installed on the tank flange (2); a pressure gauge (8) is fixedly installed on the tank body (12); a hydrogen inlet / outlet pipe (14) is fixedly installed at the other end of the tank body (12), and the two are connected.

3. The internal heat exchange solid metal hydrogen storage device according to claim 1, characterized in that: The first delivery assembly includes a cold liquid tank (706), a condenser (707), and a first delivery pump (704). The condenser (707) is fixedly installed on the cold liquid tank (706) and cools the fluid medium in the cold liquid tank (706). The medium inflow end of the cold liquid tank (706) is connected to the medium outflow end of the heat exchange coil (6). The medium outflow end of the cold liquid tank (706) is fixedly installed and connected to the medium inflow end of the first delivery pump (704). The medium outflow end of the first delivery pump (704) is connected to the medium inflow end of the heat exchange coil (6). The second delivery assembly includes a hot liquid tank (708), a heater (709), and a second delivery pump (705). The heater (709) is fixedly installed on the hot liquid tank (708) and heats the fluid medium in the hot liquid tank (708). The medium inflow end of the hot liquid tank (708) is connected to the medium outflow end of the heat exchange coil (6). The medium outflow end of the hot liquid tank (708) is fixedly installed and connected to the medium inflow end of the second delivery pump (705). The medium outflow end of the second delivery pump (705) is connected to the medium inflow end of the heat exchange coil (6).

4. The internal heat exchange solid metal hydrogen storage device according to claim 3, characterized in that: The temperature control component (9) includes a control element, a first temperature sensor (902), a second temperature sensor (904), and a third temperature sensor (906). The first temperature sensor (902) is fixedly installed inside the tank body (12), the second temperature sensor (904) is fixedly installed inside the cold liquid tank (706), and the third temperature sensor (906) is fixedly installed inside the hot liquid tank (708).

5. The internal heat exchange solid metal hydrogen storage device according to claim 4, characterized in that: The control unit is a programmable logic controller, which is electrically connected to the first temperature sensor (902), the second temperature sensor (904), the third temperature sensor (906), the first delivery pump (704), the condenser (707), the second delivery pump (705), and the heater (709).

6. The internal heat exchange solid metal hydrogen storage device according to claim 4, characterized in that: The control unit includes a first temperature controller (901), a second temperature controller (903), and a third temperature controller (905). The first temperature controller (901) is electrically connected to a first temperature sensor (902), a first delivery pump (704), and a second delivery pump (705), respectively. The second temperature controller (903) is electrically connected to a second temperature sensor (904) and a condenser (707), respectively. The third temperature controller (905) is electrically connected to a third temperature sensor (906) and a heater (709), respectively.

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