A vehicle power system and control method based on a constant volume solid hydrogen pool

Abstract

The present invention relates to the field of vehicle power technology, and specifically to a vehicle power system and control method based on a constant volume solid hydrogen pool. The vehicle power system includes a power drive module, a power battery module, a solid hydrogen pool module, and a vehicle control module. The power battery module includes a hydrogen fuel cell and a pure electric cell. The solid hydrogen pool module includes a hydrogen release unit, a feed unit, a water supply unit, and a hydrogen supply unit. The hydrogen release unit includes a reactor. The feed unit includes a raw material bin and a feed nozzle. The water supply unit includes a water tank, a water pump, an atomizing nozzle, and a water circulation component. The hydrogen supply unit includes a slow hydrogen component and an ejector component. The ejector component ejects the solid hydrogen storage material from the raw material bin through the high-pressure hydrogen introduced by the reactor and injects it into the reactor in a gas-solid mixed manner. The present invention achieves efficient activation and controlled hydrogen release of the solid hydrogen storage material by precisely matching the injection amount of the solid hydrogen storage material, ensuring the smoothness of the vehicle power response and the continuity of energy supply.

Description

Technical Field

[0001] The present invention relates to the field of vehicle power technology, and in particular to a vehicle power system and a control method based on a constant-volume solid-state hydrogen pool. Background Art

[0002] Hydrogen, a renewable secondary energy source, has attracted widespread attention due to its pollution-free and environmentally friendly process products during energy conversion and utilization. In particular, in the automotive sector, it is being used in hydrogen fuel cell-based power systems as a new energy carrier that can replace traditional fossil fuels. Within a hydrogen fuel cell engine system, hydrogen and oxygen react under the action of an electrochemical catalyst, releasing electricity and heat. The electricity is used to drive the vehicle, while the heat is dissipated through an external heat sink. During this process, hydrogen's low density often results in a low storage density. To achieve the long-range driving goals of on-board hydrogen fuel cell power cells, the pressure of the vehicle's hydrogen storage system continues to increase, and the energy required for pressurization is constantly increasing. These issues result in significant energy consumption for energy storage and conversion. Even if hydrogen can be compressed to 35 MPa or 70 MPa, the storage density still cannot meet the long-range requirements of commercial heavy-duty trucks. Therefore, a power system with high density, high reliability, high safety, and high efficiency in hydrogen release is urgently needed to meet the long-range requirements of commercial heavy-duty trucks. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a vehicle power system and control method based on a constant volume solid-state hydrogen pool, so as to solve the problem that the power system using on-board hydrogen fuel cell power cells in the prior art cannot meet the long-range requirements of commercial heavy-duty trucks.

[0004] The present invention discloses a vehicle power system based on a constant volume solid-state hydrogen pool, comprising a power drive module, a power battery module, a solid-state hydrogen pool module and a vehicle control module, wherein the power drive module is used to provide driving force for the vehicle; the power battery module comprises a hydrogen fuel cell and a pure electric cell, and the hydrogen fuel cell and the pure electric cell are electrically connected to the power drive module respectively; the solid-state hydrogen pool module comprises a hydrogen release unit, a feeding unit, a water supply unit and a hydrogen supply unit, the hydrogen release unit comprises a reactor, and a catalyst layer and a first pressure sensor arranged in the reactor, the top and bottom of the reactor are in a conical structure arranged relative to each other, the feeding unit comprises a raw material bin, and a feeding nozzle located on one side of the top of the reactor and connected to the raw material bin, the water supply unit comprises a water tank, a water pump, a water circulation component, and a nozzle located on the other side of the top of the reactor and spraying in a direction The atomizing nozzle is opposite to the feeding nozzle, the water tank, the water pump and the atomizing nozzle are connected in sequence, the water circulation component is connected to the tail water discharge end of the hydrogen fuel cell and the water tank, the hydrogen supply unit includes a slow hydrogen component and an ejection component, the slow hydrogen component is connected to the top of the reactor and the hydrogen fuel cell, the raw material bin is connected to the feeding nozzle through the ejection component, and the ejection component is connected to the reactor, which is used to eject the solid hydrogen storage material from the raw material bin through the hydrogen introduced into the reactor, and quantitatively inject it into the reactor from the feeding nozzle in a gas-solid mixed manner; the vehicle control module is respectively communicated with the power drive module, the power battery module and the solid-state hydrogen pool module, and the first pressure sensor is respectively linked to the supply rate of the feeding unit, the water supply unit and the hydrogen supply unit through the vehicle control module.

[0005] Optionally, a hydrogen release outlet is provided at the top of the reactor, and the ejector assembly includes a material ejector and a three-way valve, one connecting port on the three-way valve is connected to the hydrogen release outlet, another connecting port on the three-way valve is connected to the hydrogen buffer assembly, the last connecting port on the three-way valve is connected to the working fluid port of the material ejector, the suction port of the material ejector is connected to the raw material bin, and the pressure port of the material ejector is connected to the feed nozzle.

[0006] Optionally, the ejection assembly further includes a power air storage chamber and a one-way valve, the three-way valve, the power air storage chamber and the working fluid port of the material ejector are connected in sequence, and the one-way valve is arranged on the pipeline connecting the power air storage chamber and the material ejector.

[0007] Optionally, the feeding unit further comprises a crushing box with a built-in crushing mechanism, and the raw material bin, the crushing box and the suction port of the material ejector are connected in sequence;

[0008] The built-in crushing mechanism of the crushing box is located in the upper half of the crushing box, the raw material bin is connected to the top of the crushing box, and the suction port of the material ejector is connected to the bottom of the crushing box.

[0009] Optionally, the vehicle power system also includes a thermal management unit, which includes a coolant compensation tank, a heat dissipation water jacket arranged on the outer surface of the reactor, and a cooling pipeline arranged in the reactor. The coolant compensation tank is pre-stored with cooling medium, a first medium circulation pipeline is arranged between the coolant compensation tank and the heat dissipation water jacket, and a first medium pump is arranged on the first medium circulation pipeline, a second medium circulation pipeline is arranged between the coolant compensation tank and the cooling pipeline, and a second medium pump is arranged on the second medium circulation pipeline, a temperature sensor is arranged in the reactor, and the temperature sensor is respectively linked to the first medium pump and the second medium pump through the vehicle control module.

[0010] Optionally, the thermal management unit also includes a heat exchanger, and the first medium circulation pipeline and the second medium circulation pipeline are both connected to the liquid inlet of the coolant compensation tank through the heat exchanger, and a third medium circulation pipeline is arranged between the heat exchanger and the electrochemical reaction chamber of the hydrogen fuel power cell, the third medium circulation pipeline is preset with a first heat exchange medium, and a third medium pump is arranged on the third medium circulation pipeline.

[0011] Optionally, the hydrogen buffer assembly includes a hydrogen buffer tank, a solid-state hydrogen storage component, and a heating element. The hydrogen buffer tank is a horizontal structure. One end of the hydrogen buffer tank is provided with an air inlet connected to the three-way valve, and the other end of the hydrogen buffer tank is provided with an air outlet connected to the hydrogen inlet side of the hydrogen fuel cell. A second pressure sensor is provided on the pipeline connecting the hydrogen buffer tank and the hydrogen fuel cell, and the second pressure sensor is respectively linked to the supply rate of the feed unit, the water supply unit, and the hydrogen supply unit;

[0012] The solid-state hydrogen storage component and the heating element are both arranged in the hydrogen buffer tank, and the solid-state hydrogen storage component releases hydrogen through the low-temperature heat provided by the heating element. The heating element includes an electric heater and a fourth medium circulation pipeline arranged between the hydrogen buffer tank and the heat exchanger. The fourth medium circulation pipeline is preset with a second heat exchange medium, and a fourth medium pump is provided on the fourth medium circulation pipeline.

[0013] Optionally, the water circulation component includes a first steam-water separator and a second steam-water separator, the first steam-water separator is connected to the anode reaction side of the hydrogen fuel power cell, and is used to draw out unreacted water vapor in the anode of the hydrogen fuel power cell, and the second steam-water separator is connected to the cathode product side of the hydrogen fuel power cell, and is used to draw out the reaction products in the cathode of the hydrogen fuel power cell, and the separation liquid outlets of the first steam-water separator and the second steam-water separator are both connected to the water tank.

[0014] Optionally, the solid-state hydrogen pool module includes a plurality of hydrogen release units, and each of the hydrogen release units is connected to the feed unit, the water supply unit and the hydrogen supply unit;

[0015] The reactors corresponding to the multiple hydrogen release units are configured with the same or different reaction temperatures and catalysts, and the multiple hydrogen release units configured with the same reaction temperature and catalyst constitute a hydrogen release module, and the reaction rates of the hydrogen release units in different hydrogen release modules are increased by configuring different reaction temperatures and catalysts;

[0016] The solid-state hydrogen pool module also includes a tailings recovery unit, which includes a tailings bin, a tailings pump and a solenoid valve. A tailings discharge port is provided in the middle of the bottom end of the reactor. The solenoid valve is provided in the tailings discharge port, and the solenoid valve is connected to the tailings bin through the tailings pump.

[0017] The present invention also discloses a control method for controlling the above-mentioned vehicle power system based on a constant volume solid hydrogen pool, the control method comprising:

[0018] In response to the target vehicle being powered on in standby mode, the output power of the power drive module is collected in real time according to the current working state of the target vehicle;

[0019] Converting the output power of the power drive module into the power consumption of the power drive module, and calculating the hydrogen consumption requirement of the hydrogen fuel cell based on the hydrogen-to-electricity conversion efficiency according to the power consumption of the power drive module;

[0020] When the hydrogen consumption demand of the hydrogen fuel cell meets the demand threshold, triggering control to inject the solid hydrogen storage material in the raw material bin and the water in the water tank into the reactor for hydrogen release reaction;

[0021] The amount of solid hydrogen storage material and water injected into the reactor is acquired in real time, and the actual hydrogen release efficiency is calculated based on the ideal gas law in combination with the hydrogen release pressure in the reactor acquired in real time by the first pressure sensor;

[0022] When the hydrogen release pressure in the reactor tends to be stable, the theoretical maximum hydrogen release amount is calculated according to the injection amount of the solid hydrogen storage material and the water injection amount when the hydrogen release pressure is stable, and the target hydrogen release efficiency is calculated in combination with the hydrogen consumption demand;

[0023] The actual hydrogen release efficiency is matched with the target hydrogen release efficiency in real time, and in response to judging that the actual hydrogen release amount is less than the target hydrogen release efficiency, the trigger control dynamically adjusts the working parameters of the ejector assembly and the water pump until the actual hydrogen release efficiency reaches the target hydrogen release efficiency.

[0024] Compared with the prior art, the vehicle power system and control method based on a constant volume solid hydrogen pool provided by the embodiments of the present invention have the following advantages:

[0025] By constructing a hybrid vehicle powertrain powered by a hydrogen fuel cell and a pure electric battery, and integrating a solid-state hydrogen pool module with the hydrogen fuel cell, the system utilizes a portion of the hydrogen released from the constant-volume reactor as the driving medium for the ejector assembly when the hydrogen fuel cell requires it. This ejector assembly then injects a portion of the solid-state hydrogen storage material from the feedstock bin into the reactor at high speed, eliminating the energy loss associated with traditional mechanical conveying mechanisms. Closed-loop control ensures precise matching of the injected solid-state hydrogen storage material, significantly improving the hydrogen release efficiency per unit mass of the solid-state hydrogen storage material. A water pump is also integrated to deliver water, enabling efficient activation and controlled hydrogen release of the solid-state hydrogen storage material. Furthermore, a water circulation assembly redirects tailwater from the hydrogen fuel cell into a water tank for water dehydrogenation, achieving closed-loop utilization of water resources. This combined design of the constant-volume reactor, the feed unit, the water supply unit, and the hydrogen supply unit provides a continuous and stable hydrogen supply to the hydrogen fuel cell, ensuring smooth power response and continuous energy supply under complex operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0027] Figure 1 A schematic diagram of the overall structure of a vehicle power system provided by an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the integrated structure of a solid-state hydrogen pool module and a hydrogen fuel cell provided in an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the structure of the integration of a solid-state hydrogen pool module and a thermal management unit provided in an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the structure of multiple hydrogen release units provided in an embodiment of the present invention.

[0031] The symbols in the accompanying drawings represent the following:

[0032] 1. Power drive module; 2. Power battery module; 21. Hydrogen fuel cell; 22. Pure electric cell; 3. Hydrogen release unit; 31. Reactor; 32. Catalyst layer; 33. First pressure sensor; 4. Feed unit; 41. Raw material bin; 42. Feed nozzle; 43. Crushing box; 5. Water supply unit; 51. Water tank; 52. Water pump; 53. Water circulation assembly; 531. First steam-water separator; 532. Second steam-water separator; 54. Atomizing nozzle; 6. Hydrogen supply unit; 61. Hydrogen buffer assembly; 611. Hydrogen buffer tank; 612. Solid-state hydrogen storage component; 613. Fourth medium circulation pipeline; 614. Fourth medium pump; 62. Ejector assembly; 621. Material ejector; 622. Three-way valve; 623. Power air storage chamber; 624. One-way valve; 7. Vehicle control module; 8. Thermal management unit; 81. Coolant compensation tank; 82. Heat dissipation water jacket; 821. First medium circulation pipeline; 822. First medium pump; 83. Cooling pipeline; 831. Second medium circulation pipeline; 832. Second medium pump; 84. Heat exchanger; 841. Third medium circulation pipeline; 842. Third medium pump; 9. Tailing recovery unit. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention will be described in detail.

[0034] The present invention discloses a vehicle power system based on a constant volume solid hydrogen pool, such as Figure 1 and Figure 2As shown, it includes a power drive module 1, a power battery module 2, a solid-state hydrogen pool module and a vehicle control module 7. The power drive module 1 is used to provide driving force for the vehicle; the power battery module 2 includes a hydrogen fuel cell power battery 21 and a pure electric cell power battery 22, and the hydrogen fuel cell power battery 21 and the pure electric cell power battery 22 are electrically connected to the power drive module 1 respectively; the solid-state hydrogen pool module includes a hydrogen release unit 3, a feeding unit 4, a water supply unit 5 and a hydrogen supply unit 6. The hydrogen release unit 3 includes a reactor 31, and a catalyst layer 32 and a first pressure sensor 33 arranged in the reactor 31. The top and bottom of the reactor 31 are in a conical structure arranged relatively. The feeding unit 4 includes a raw material bin 41 and a feeding nozzle 42 located on the top side of the reactor 31 and connected to the raw material bin 41. The water supply unit 5 includes a water tank 51, a water tank 52, a water tank 53 and a water tank 54. The pump 52, the water circulation component 53, and the atomizing nozzle 54 located on the other side of the top of the reactor 31 and the injection direction is opposite to the feed nozzle 42. The water tank 51, the water pump 52 and the atomizing nozzle 54 are connected in sequence. The water circulation component 53 is connected to the tail water discharge end of the hydrogen fuel cell 21 and the water tank 51. The hydrogen supply unit 6 includes a slow hydrogen component 61 and an ejection component 62. The slow hydrogen component 61 is connected to the top of the reactor 31 and the hydrogen fuel cell 21. The raw material bin 41 is connected to the feed nozzle 42 through the ejection component 62, and the ejection component 62 is connected to the reactor 31. It is used to eject the solid hydrogen storage material from the raw material bin 41 through the high-pressure hydrogen introduced by the reactor 31, and quantitatively inject it into the reactor 31 from the feed nozzle 42 in a gas-solid mixed manner; the vehicle control module 7 preferably adopts CAN (Controller Area Network, controller local area network) is respectively communicated with the power drive module 1, the power battery module 2, and the solid-state hydrogen pool module, and the first pressure sensor 33 is respectively linked to the supply rate of the feeding unit 4, the water supply unit 5 and the hydrogen supply unit 6 through the vehicle control module 7.

[0035] By implementing the above-mentioned vehicle power system embodiment, a vehicle power system is constructed that is hybrid-powered by a hydrogen fuel cell 21 and a pure electric power cell 22, and a solid-state hydrogen pool module is integrated with the hydrogen fuel cell 21. When the hydrogen fuel cell 21 requires hydrogen, part of the hydrogen released in the constant volume reactor 31 is used as the driving medium of the ejector assembly 62, and part of the solid-state hydrogen storage material output from the raw material bin 41 is injected into the reactor 31 at high speed through the ejector assembly 62, thereby avoiding the energy loss of the traditional mechanical conveying structure. The closed-loop control ensures the precise matching of the injection amount of the solid-state hydrogen storage material, thereby significantly improving the hydrogen release efficiency per unit mass of the solid-state hydrogen storage material. In addition, a water pump 52 is used to transport water, so that the solid-state hydrogen storage material and water injected into the reactor 31 undergo a rapid hydrolysis-hydrogenation reaction under the catalytic action of the catalyst layer 32, thereby achieving efficient activation and controlled hydrogen release of the solid-state hydrogen storage material. Preferably, the hydrogen fuel cell 21 and the pure electric cell 22 are electrically connected to the power drive module 1 via an all-in-one controller. The all-in-one controller typically includes multiple functional modules, such as a battery management system (BMS), a motor controller, an energy management system (EMS), and a communication interface, enabling it to process data from various sources and control multiple subsystems. For example, data such as battery voltage, current, and temperature are collected to ensure the battery operates within a safe operating range. The controller also monitors the battery's charge and discharge status, as well as its health.

[0036] The ejector assembly 62 utilizes the hydrogen generated within the reactor 31 as a power source, creating a high-speed ejector flow through the Venturi effect. This precisely delivers the solid-state hydrogen storage material from the raw material bin 41 into the reactor 31 as a gas-solid two-phase flow. Requiring no additional high-pressure air pump or motor drive, material transport is accomplished solely through the kinetic energy of the hydrogen itself, significantly reducing the energy consumption of the solid-state hydrogen storage material supply. Furthermore, the premixing of hydrogen and the solid-state hydrogen storage material during the ejection process ensures a uniform dispersion of the material before entering the reactor 31, significantly shortening the activation time for the subsequent hydrolysis reaction. Furthermore, the ejector assembly 62 and water pump 52 form a closed-loop feedback control chain with the first pressure sensor 33 and the vehicle control module 7. Specifically, when the pressure within the reactor 31 fluctuates due to changes in demand from the hydrogen fuel cell 21, the ejector gas flow rate and the kinetic energy of the water pump 52 are dynamically adjusted to ensure that the injection rate of the solid-state hydrogen storage material and water is strictly matched to the hydrogen consumption rate.

[0037] For example, if a vehicle accelerates suddenly, causing a surge in hydrogen demand from the hydrogen fuel cell 21 and the pressure within the reactor 31 to fall below a preset threshold, the solid-state hydrogen storage material supply is instantly boosted by increasing the injected hydrogen flow rate. Simultaneously, the atomizing nozzle 54 increases the amount of water mist sprayed, regulated by the water pump 52, to ensure a dynamic balance between material concentration and reaction intensity within the reactor 31. This immediate response ensures a stable and continuous hydrogen supply, avoiding the risk of power interruption caused by delayed hydrogen supply.

[0038] In addition, by utilizing the relatively arranged conical structures at the top and bottom of the reactor 31, the synergistic optimization of efficient hydrogen generation and stable system operation is achieved through deep coupling of geometric design and fluid dynamics. That is, the conical contraction structure at the top of the reactor 31 can accelerate the directional output of hydrogen and reduce gas phase retention by using the inertia of the airflow. At the same time, by utilizing the atomizing nozzle 54 and the feed nozzle 42 arranged relatively on both sides of the top of the reactor 31, when the solid hydrogen storage material and water are sprayed into the reactor 31 at high speed through the corresponding nozzles, counter-jet streams are formed, forcing the water and the solid hydrogen storage material to collide in multiple directions and mix evenly in the reactor 31, significantly improving the dispersion and contact activity of the solid hydrogen storage material and water. The cone at the bottom of the reactor 31 facilitates the dynamic sedimentation and centralized discharge of tailings and unreacted products through the tapered flow channel.

[0039] As described above, the water circulation assembly also redirects tailwater generated by the hydrogen fuel cell 21 into the water tank 51 to participate in the water decomposition and hydrogenation reaction, achieving closed-loop water resource utilization and reducing dependence on external water sources. Thus, the combined design of the constant volume reactor 31, the feeding unit 4, the water supply unit 5, and the hydrogen supply unit 6 provides a continuous and stable supply of hydrogen energy to the hydrogen fuel cell 21. Simultaneously, through the coordinated control strategy of the first pressure sensor 33 and the vehicle control module 7, the feeding rate and water supply rate are dynamically matched with the hydrogen consumption demand of the fuel cell. The power battery module 2 adopts a composite power supply architecture of the hydrogen fuel cell 21 and the pure electric power battery 22. Under high-load conditions such as vehicle acceleration or climbing, the coordinated discharge of the dual energy system can instantly provide peak power output. During low-speed cruising, the hydrogen fuel cell 21 is prioritized for power supply. Specifically for the long-distance transportation characteristics of commercial vehicles, there is no need to continuously consume energy to maintain a high-voltage state, ensuring improved storage and transportation safety and reduced energy consumption costs, thereby ensuring the vehicle's power response smoothness and energy supply continuity under complex operating conditions.

[0040] Preferably, the solid-state hydrogen storage material is a high hydrogen storage density solid-state hydrogen storage material, including reversible solid-state hydrogen storage materials, or irreversible solid-state hydrogen storage materials, including metal solid-state hydrogen storage materials and non-metallic solid-state hydrogen storage materials, mainly high hydrogen storage density solid-state hydrogen storage materials that can release hydrogen by adding water. For example, metal materials such as magnesium (Mg), calcium (Ca), aluminum (Al), hydrogen storage alloys, inorganic ionic compound solid-state hydrogen storage materials, carbonaceous solid-state hydrogen storage materials, metal organic framework compound solid-state hydrogen storage materials, etc. Hydrogen storage alloys include binary, ternary and multi-element systems, such as lithium hydride (LiH), sodium hydride (NaH), potassium hydride (KH), magnesium dihydride ( ), calcium dihydride ( )、Aluminum hydride( ) etc.; Inorganic ionic compound solid hydrogen storage materials mainly include coordinated hydrides and amino compounds, such as sodium aluminum tetrahydride ( )、lithium borohydride( ) and ammonia borane are both solid-state hydrogen storage materials with relatively high hydrogen storage density.

[0041] Further, combined with Figure 3 As shown, a hydrogen release outlet is provided at the top of the reactor 31, and the ejector assembly 62 includes a material ejector 621 and a three-way valve 622, one connecting port on the three-way valve 622 is connected to the hydrogen release outlet, another connecting port on the three-way valve 622 is connected to the hydrogen buffer assembly 61, and the last connecting port on the three-way valve 622 is connected to the working fluid port of the material ejector 621, the suction port of the material ejector 621 is connected to the raw material bin 41, and the pressure port of the material ejector 621 is connected to the feed nozzle 42.

[0042] Furthermore, the ejection assembly 62 also includes a power air storage chamber 623 and a one-way valve 624. The three-way valve 622, the power air storage chamber 623 and the working fluid port of the material ejector 621 are connected in sequence, and the one-way valve 624 is arranged on the pipeline connecting the power air storage chamber 623 and the material ejector 621.

[0043] Through the implementation of the above-described vehicle power system embodiment, the three-way valve 622 serves as a physical distribution node for hydrogen flow, directing hydrogen from the hydrogen release outlet of the reactor 31 to the ejector assembly 62 or the hydrogen buffer assembly 61. The high-pressure hydrogen introduced into the ejector assembly 62 first enters the power gas storage chamber 623 for storage, forming a stable ejection-driven pressure reserve, which can smooth out transient fluctuations in hydrogen release from the reactor 31. When the material ejector 621 is activated, the high-pressure hydrogen stored in the power gas storage chamber 623 is released through the one-way valve 624 into the working fluid port of the material ejector 621, forming a high-speed jet. At this time, the mixing chamber within the material ejector 621 generates a strong negative pressure adsorption effect, continuously drawing in and accelerating the solid-state hydrogen storage material within the raw material bin 41, ultimately injecting it into the reactor 31 through the feed nozzle 42 at a precisely controllable rate. For the vehicle power system, this structure enables the solid-state hydrogen storage material supply process to rely entirely on the system's internal hydrogen circulation energy, eliminating the need for additional on-board electrical or mechanical energy consumption, achieving zero parasitic power consumption for the feed subsystem. At the same time, the gas-solid two-phase flow generated by the material ejector 621 driven by high-pressure hydrogen enables the solid hydrogen storage material to obtain sufficient momentum and dispersion during the transportation process. When it is sprayed into the top of the reactor 31 from the feed nozzle 42, it can form a more uniform spatial interlacing with the atomized water jet, significantly improving the initial mixing efficiency of the hydrolysis reaction and ensuring the continuity and reliability of the vehicle power system under complex working conditions.

[0044] Furthermore, the feeding unit 4 further includes a crushing box 43 with a built-in crushing mechanism, and the raw material bin 41, the crushing box 43 and the suction port of the material ejector 621 are sequentially connected;

[0045] The crushing mechanism built into the crushing box 43 is located in the upper half of the crushing box 43 , the raw material bin 41 is connected to the top of the crushing box 43 , and the suction port of the material ejector 621 is connected to the bottom of the crushing box 43 .

[0046] Through the implementation of the above-mentioned vehicle power system embodiment, the solid-state hydrogen storage material in the raw material bin 41 can be a powdered material or a non-powdered material. If the solid-state hydrogen storage material in the raw material bin 41 is in powdered form, it is directly transported to the crushing box 43 for storage, and then the powdered solid-state hydrogen storage material stored in the crushing box 43 is injected into the reactor 31 through the material ejector 621. If the solid-state hydrogen storage material in the raw material bin 41 is in non-powdered form, while the solid-state hydrogen storage material is being transported to the crushing box 43, the high-speed shearing and impact action of the built-in crushing mechanism of the crushing box 43 is utilized to crush the solid-state hydrogen storage material into powder, and then the powdered solid-state hydrogen storage material is injected into the reactor 31 through the material ejector 621. This ensures that the solid-state hydrogen pool module of the embodiment of the present invention can be applied to solid-state hydrogen storage materials of any shape.

[0047] Secondly, by utilizing the design that the suction port of the material ejector 621 is connected to the bottom of the crushing box 43, continuous feeding is achieved through the deadweight of the solid hydrogen storage material. When the material ejector 621 is started, the solid hydrogen storage material at the bottom of the crushing box 43 forms a stable fluidized conveying under the dual effects of negative pressure adsorption and gravity, and its fluidity is significantly improved. And while the crushing mechanism continues to crush the new raw materials in the upper part of the crushing box 43, the processed powder at the bottom can be transported independently. This parallel processing mode doubles the overall efficiency of the feeding unit 4. For the vehicle power system, its feeding response speed is improved, and the time of the hydrolysis reaction is greatly shortened, thereby ensuring the hydrogen supply stability of the solid hydrogen pool module and providing all-weather reliable energy guarantee for the vehicle power system.

[0048] Furthermore, the vehicle power system also includes a thermal management unit 8, which includes a coolant compensation tank 81, a heat dissipation water jacket 82 arranged on the outer surface of the reactor 31, and a cooling pipeline 83 arranged in the reactor 31. The coolant compensation tank 81 is pre-stored with cooling medium, and a first medium circulation pipeline 821 is arranged between the coolant compensation tank 81 and the heat dissipation water jacket 82, and a first medium circulation pipeline 821 is arranged on the first medium circulation pipeline 821. A second medium circulation pipeline 831 is arranged between the coolant compensation tank 81 and the cooling pipeline 83, and a second medium pump 832 is arranged on the second medium circulation pipeline 831. A temperature sensor is arranged in the reactor 31, and the temperature sensor is linked to the first medium pump 822 and the second medium pump 832 respectively through the vehicle control module 7.

[0049] Furthermore, the thermal management unit 8 also includes a heat exchanger 84, and the first medium circulation pipeline 821 and the second medium circulation pipeline 831 are both connected to the liquid inlet of the coolant compensation tank 81 through the heat exchanger 84, and a third medium circulation pipeline 841 is arranged between the heat exchanger 84 and the electrochemical reaction chamber of the hydrogen fuel power cell 21. The first heat exchange medium is preset in the third medium circulation pipeline 841, and a third medium pump 842 is arranged on the third medium circulation pipeline 841.

[0050] Through the implementation of the above-described vehicle power system embodiment, the coolant pipeline within reactor 31 directly acts on the hydrolysis hydrogenation reaction zone. A second medium pump 832 regulates the coolant flow rate to dynamically dissipate the reaction heat, maintaining reactor 31 at a suitable reaction temperature. Simultaneously, a heat dissipation jacket 82 external to reactor 31 covers the entire reactor 31, balancing regional temperature differences generated by internal cooling within reactor 31, ensuring uniformity of the overall temperature field within reactor 31 and preventing reaction rate fluctuations. Furthermore, a temperature sensor provides real-time feedback on temperature data within reactor 31, and the vehicle control module 7 operates in conjunction with a dual-medium pump. When an abnormal temperature rise within reactor 31 is detected, the internal coolant pipeline initiates emergency cooling, while the external heat dissipation jacket 82 simultaneously initiates a pressurized cycle to rapidly dissipate excess reaction heat. This dual-path thermal management approach improves heat dissipation per unit volume and effectively prevents localized overheating.

[0051] Based on the above cooling method, in order to cool the medium that extracts the reaction heat for recycling, the embodiment of the present invention also proposes a waste heat recovery mode. That is, the reaction heat absorbed by the medium in the heat dissipation water jacket 82 and the cold liquid pipeline is exchanged with the electrochemical reaction in the hydrogen fuel cell 21 through the heat exchanger 84 to preheat or maintain the electrochemical reaction temperature in the hydrogen fuel cell 21, thereby realizing the recycling of heat energy. Therefore, when the stack in the hydrogen fuel cell 21 is at a low temperature, the waste heat recovery mode is enabled to form a cross-module thermal balance, which enables the cooling medium to be recycled and ensures that the power generation efficiency of the hydrogen fuel cell 21 is doubled, thereby greatly increasing the endurance of the vehicle power system.

[0052] Furthermore, the hydrogen buffer assembly 61 includes a hydrogen buffer tank 611, a solid-state hydrogen storage component 612, and a heating element. The hydrogen buffer tank 611 is a horizontal structure. One end of the hydrogen buffer tank 611 is provided with an air inlet connected to the three-way valve 622, and the other end of the hydrogen buffer tank 611 is provided with an air outlet connected to the hydrogen inlet side of the hydrogen fuel cell 21. A second pressure sensor is provided on the pipeline connecting the hydrogen buffer tank 611 and the hydrogen fuel cell 21. The second pressure sensor is respectively linked to the supply rate of the feeding unit 4, the water supply unit 5, and the hydrogen supply unit 6;

[0053] The solid-state hydrogen storage component 612 and the heating element are both arranged in the hydrogen buffer tank 611, and the solid-state hydrogen storage component 612 releases hydrogen through the low-temperature heat provided by the heating element. The heating element includes an electric heater and a fourth medium circulation pipeline 613 arranged between the hydrogen buffer tank 611 and the heat exchanger 84. The fourth medium circulation pipeline 613 is preset with a second heat exchange medium, and a fourth medium pump 614 is provided on the fourth medium circulation pipeline 613.

[0054] Through the implementation of the above-mentioned vehicle power system embodiment, when the hydrogen released from the hydrogen release outlet of the reactor 31 is directed into the hydrogen buffer assembly 61, the hydrogen buffer tank 611 is used to buffer and store the hydrogen released by hydrolysis in the reactor 31. The solid-state hydrogen storage component 612 provided inside the hydrogen buffer tank 611 absorbs part of the instantaneous high-pressure hydrogen released from the reactor 31 and entering the hydrogen buffer tank 611 through physical adsorption. Combined with the fact that the hydrogen buffer tank 611 itself has a certain hydrogen storage capacity, the pressure change impact caused by the hydrogen decomposition in the reactor 31 can be greatly reduced. At the same time, when the hydrogen release efficiency in the reactor 31 is far less than the hydrogen consumption demand of the hydrogen fuel cell 21, the heating element is activated to perform low-temperature heating in the hydrogen buffer tank 611, and the hydrogen stored in the solid-state hydrogen storage component 612 is quickly released in a short period of time, thereby maintaining the stability of the inlet pressure of the hydrogen fuel cell 21 and even meeting the sudden increase in the load of the hydrogen fuel cell 21. The solid-state hydrogen storage component 612 is different from the solid-state hydrogen storage material in the reactor 31 and can release the adsorbed hydrogen by only low-temperature heat, for example, non-metallic solid-state hydrogen storage materials such as aminoborane.

[0055] In addition, since a large amount of reaction heat is released during the hydrolysis reaction in the reactor 31, while the reaction heat is used to start the hydrogen fuel cell 21 at low temperature, the reaction heat absorbed by the medium in the cooling water jacket 82 and the cold liquid pipeline can be exchanged with the second heat exchange medium in the fourth medium circulation pipeline 613 through the heat exchanger 84 to maintain the hydrogen release temperature in the slow hydrogen tank 611, further realizing the recycling of thermal energy. At the same time, the internal environment of the slow hydrogen tank can be preheated at low temperature using an electric heater, and after reaching the temperature at which the solid-state hydrogen storage component 612 can release hydrogen, the second heat exchange medium is switched to maintain the hydrogen release temperature in the slow hydrogen tank 611.

[0056] Furthermore, the water circulation component 53 includes a first steam-water separator 531 and a second steam-water separator 532. The first steam-water separator 531 is connected to the anode reaction side of the hydrogen fuel power cell 21, and is used to draw out the unreacted water vapor in the anode of the hydrogen fuel power cell 21. The second steam-water separator 532 is connected to the cathode product side of the hydrogen fuel power cell 21, and is used to draw out the reaction products in the cathode of the hydrogen fuel power cell 21. The separated liquid outlets of the first steam-water separator 531 and the second steam-water separator 532 are both connected to the water tank 51.

[0057] Through the implementation of the above-mentioned vehicle power system embodiment, since the electrochemical reaction inside the hydrogen fuel cell 21 releases electrical energy, it cannot be guaranteed that all hydrogen is completely electrolyzed, so that some electrolysis products will still exist in the anode, mainly including unreacted hydrogen and a small amount of water vapor. Therefore, the first steam-water separator 531 is used to extract the unreacted water vapor in the anode of the hydrogen fuel cell 21 and perform gas-water separation. In addition, since the hydrogen produced by hydrolysis in the reactor 31 needs to have a certain humidity to meet the operating mass transfer conditions of the battery stack in the hydrogen fuel cell 21, when the electrochemical reaction inside the hydrogen fuel cell 21 releases electrical energy, the water vapor product located at the cathode after the reaction does not need to be refluxed, and is extracted through the second steam-water separator 532 and subjected to steam-water separation. The aqueous solution containing hydrogen atoms separated by the first steam-water separator 531 and the second steam-water separator 532 is recycled back to the water tank 51 for water decomposition and hydrogenation reaction, which can achieve closed-loop utilization of water resources and reduce the demand for external water replenishment. By reusing the hydrogen atoms in the aqueous solution to release hydrogen, the power generation efficiency of the hydrogen fuel cell 21 can be doubled, thereby greatly increasing the endurance of the vehicle power system.

[0058] Further, combined with Figure 2 and Figure 4 As shown, the solid-state hydrogen pool module includes a plurality of hydrogen release units 3, and each hydrogen release unit 3 is connected to a feed unit 4, a water supply unit 5 and a hydrogen supply unit 6;

[0059] The reactors 31 corresponding to the multiple hydrogen release units 3 are configured with the same or different reaction temperatures and catalysts. The multiple hydrogen release units 3 configured with the same reaction temperature and catalyst constitute a hydrogen release module, and the reaction rates of the hydrogen release units 3 in different hydrogen release modules are increased by configuring different reaction temperatures and catalysts.

[0060] The solid-state hydrogen pool module also includes a tailings recovery unit 9, which includes a tailings bin, a tailings pump and a solenoid valve. A tailings outlet is provided in the middle of the bottom end of the reactor 31, and the solenoid valve is provided in the tailings outlet. The solenoid valve is connected to the tailings bin through the tailings pump.

[0061] Through the implementation of the above-mentioned vehicle power system embodiment, by utilizing the modular combination of multiple hydrogen-releasing units 3 and the hierarchical reaction control strategy, comprehensive optimization is achieved in terms of the flexibility of hydrogen energy supply, system energy efficiency and sustainability, thereby allowing the vehicle control module 7 to dynamically adjust the hydrogen production scale according to the vehicle power demand.

[0062] That is, under low-load conditions, only some hydrogen release modules, or some hydrogen release units 3 within a hydrogen release module, are activated to reduce energy consumption. Under high-load conditions, multiple hydrogen release modules are used to coordinate output to meet instantaneous high power demands, significantly improving the matching accuracy between hydrogen energy supply and power demand. Different hydrogen release modules achieve a step-by-step reaction rate control capability by differentially configuring reaction temperatures and catalyst types. For example, a hydrogen release module configured with a highly active catalyst and medium-temperature conditions can quickly release hydrogen during vehicle acceleration, while a hydrogen release module using a long-lasting stability catalyst and low-temperature conditions is responsible for base load supply. This hierarchical control strategy improves the overall reaction efficiency of the system while avoiding catalyst deactivation caused by overloading a single hydrogen release unit 3.

[0063] In addition, during the process of releasing hydrogen in the reactor 31 and supplying hydrogen to the hydrogen fuel cell 21, when the hydrogen supply is completed and the pressure in the reactor 31 is less than the preset pressure threshold, the three-way valve 622 is closed and the solenoid valve is opened, so that the tailings collected at the bottom of the reactor 31 are directed from the tailings outlet to the tailings bin for temporary storage. Subsequently, the tailings can be activated, regenerated, or safely disposed of by an external processing system to facilitate timely removal of reaction byproducts to prevent clogging of the catalyst layer 32 and maintain the stability of the flow field inside the reactor 31. A closed-loop feedback is provided to determine whether the demand of the hydrogen fuel cell 21 has reached the preset demand threshold. When the preset demand threshold is reached, the solid-state hydrogen pool module is shut down, purged, and then shut down; if the preset demand threshold is not reached, the water dehydrogenation cycle of the solid-state hydrogen pool module continues, and the volume of the reactor 31 remains constant throughout the entire process.

[0064] The vehicle power system according to the embodiment of the present invention has the following outstanding technical effects:

[0065] 1. The vehicle power system of the present invention uses hydrogen energy as a secondary energy source for storage, and its energy storage density is more than 10 times that of traditional lithium batteries. The current higher energy density of existing lithium batteries is 200Wh / kg, and the solid-state hydrogen storage material is generally selected to have a hydrogen storage density of 20wt% after at least adding water to release hydrogen, that is, 100kg of solid-state hydrogen storage material can produce 20kg of hydrogen after reacting with water, and the low calorific value of hydrogen is 33kWh / kgH2, that is, 100kg of solid-state hydrogen storage material can store 660kWh of electrical energy. The energy density of solid-state hydrogen storage material is 6.6kWh / kg. If a hydrogen fuel cell power battery 21 is used to convert it into electricity, the efficiency of the hydrogen fuel cell power battery 21 is calculated at 60%, and the energy density of the hydrogen energy produced by the solid-state hydrogen pool module after being converted into electrical energy is 3.96kWh / kg, which is 20 times the energy density of a lithium battery, and can achieve leapfrog iteration;

[0066] 2. The vehicle power system of the present invention can fully reuse the water produced by the hydrogen fuel cell 21 to react with solid hydrogen storage materials to produce hydrogen, and reuse one hydrogen atom in the water molecule to generate electricity. In theory, this can double the power generation efficiency of the hydrogen fuel cell 21. That is, if the efficiency of the fuel cell is 60%, the hydrogen fuel cell 21 with the integrated solid hydrogen pool module of the present invention can increase the hydrogen-to-electricity conversion efficiency to 120%. Even considering the efficiency loss in actual use, the hydrogen-to-electricity conversion efficiency can reach at least 80%, which is much higher than the traditional fuel cell system using high-pressure hydrogen storage bottles;

[0067] 3. The vehicle power system of the present invention releases hydrogen gas from its solid-state hydrogen pool module to meet the hydrogen demand of the hydrogen fuel cell 21. When not in use, the hydrogen gas exists in the form of solid-state hydrogen storage material, which is highly safe at room temperature and pressure, without the risk of fire or explosion. It can be used in underground garages and is safer than gasoline and lithium-ion vehicles. This achieves the goal of using hydrogen without seeing it, completely resolving the safety issues of hydrogen energy terminal use and providing technical feasibility for the realization of a hydrogen energy social ecosystem.

[0068] 4. The vehicle power system of the present invention achieves controlled hydrogen fusion by controlling the hydrogen release rate within the fixed-volume reactor 31, making it possible to release hydrogen by adding water, thereby significantly increasing the hydrogen storage density. When the hydrogen storage density exceeds 20%, replacing the 500 kg lithium battery of a current lithium battery passenger car with a solid-state hydrogen cell module of the same weight can produce 100 kg of hydrogen. Currently, the hydrogen consumption of existing fuel cell passenger cars is generally less than 1 kgH2 / 100 km. The vehicle power system of the present invention can allow the entire vehicle to have a single driving range of more than 10,000 km, thus enabling fuel cell passenger cars to operate without charging, hydrogenation, or refueling, requiring only maintenance every 10,000 km, that is, replacing the solid-state hydrogen cell module once.

[0069] 5. The vehicle power system of the present invention makes infrastructure construction more convenient. There is no need to build hydrogen refueling stations. Instead, it is only necessary to build a solid hydrogen pool production enterprise at a hydrogen mother station or hydrogen production plant, which greatly reduces the cost of station construction. It can also reduce the construction of charging piles, charging stations, and gas stations, significantly reducing social costs.

[0070] 6. The vehicle power system of the present invention can achieve long-term power supply. Through intelligent control, it can realize timely, quantitative and intelligent control output from the vehicle-level VCU (Vehicle Control Unit) to the fuel cell level FCU (Fuel Cell Unit) and then to the hydrogen storage level HCU (Hydrogen Control Unit).

[0071] The present invention also discloses a control method for controlling the above-mentioned vehicle power system based on a constant volume solid hydrogen pool, the control method comprising:

[0072] In response to the target vehicle being powered on in standby mode, the output power of the power drive module 1 is collected in real time according to the current working state of the target vehicle;

[0073] Convert the output power of the power drive module 1 into the power consumption of the power drive module 1, and calculate the hydrogen consumption demand of the hydrogen fuel cell 21 based on the hydrogen-to-electricity conversion efficiency according to the power consumption of the power drive module 1;

[0074] When the hydrogen consumption demand of the hydrogen fuel cell 21 meets the demand threshold, the trigger control injects the solid hydrogen storage material in the raw material bin 41 and the water in the water tank 51 into the reactor 31 for hydrogen release reaction;

[0075] The amount of solid hydrogen storage material and water injected into the reactor 31 is acquired in real time, and the actual hydrogen release efficiency is calculated based on the ideal gas law in combination with the hydrogen release pressure in the reactor 31 acquired in real time by the first pressure sensor 33;

[0076] When the hydrogen release pressure in the reactor 31 tends to be stable, the theoretical maximum hydrogen release amount is calculated based on the injection amount of the solid hydrogen storage material and the water injection amount when the hydrogen release pressure is stable, and the target hydrogen release efficiency is calculated in combination with the hydrogen consumption demand;

[0077] The actual hydrogen release efficiency is matched with the target hydrogen release efficiency in real time, and in response to judging that the actual hydrogen release amount is less than the target hydrogen release efficiency, the trigger control dynamically adjusts the working parameters of the ejector assembly 62 and the water pump 52 until the actual hydrogen release efficiency reaches the target hydrogen release efficiency.

[0078] By implementing the above-described control method embodiment, a closed-loop dynamic matching mechanism is established between hydrogen energy supply and vehicle power demand. When the vehicle is started, the instantaneous output power of the power drive module 1 is prioritized. The built-in hydrogen-to-electricity conversion efficiency model is used to calculate the hydrogen consumption demand curve of the hydrogen fuel cell 21 in real time, forming a hydrogen supply control benchmark driven by power demand. This dynamically couples hydrogen energy supply with the vehicle's driving state (acceleration, cruising, braking, etc.) at the millisecond level, avoiding power response lag caused by hydrogen supply delays. During the hydrogen release reaction triggering phase, the deviation between the actual hydrogen production rate and the theoretical value within the reactor 31 is identified by synchronously quantifying the stoichiometric ratio of the solid-state hydrogen storage material and water injection, combined with pressure data fed back by the first pressure sensor 33. Based on this information, the solid-state hydrogen storage material injection rate and water injection flow rate of the ejector assembly 62 are dynamically adjusted. For example, if the actual hydrogen release efficiency is detected to be lower than the target value, the working fluid pressure of the material ejector 621 can be automatically increased, thereby increasing the hydrogen storage material injection rate. The water delivery rate of the water pump 52 is also optimized to increase the ratio of solid-state hydrogen storage material to water, restoring the reactor 31 to the optimal hydrogen production state. Thus, through multi-dimensional collaborative optimization, the solid-state hydrogen pool module can maintain a stable and continuous hydrogen production efficiency, thereby promoting the large-scale application of hydrogen fuel cell 21 in the field of vehicle power.

[0079] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art may modify the technical solutions described in the above embodiments, or replace some of the technical features therein with equivalents; and all these modifications and replacements should fall within the scope of protection of the present invention.

Claims

1. A vehicle power system based on a constant volume solid hydrogen pool, characterized in that: The vehicle power system includes: A power drive module is used to provide driving force for the vehicle; A power battery module, comprising a hydrogen fuel cell power battery and a pure electric cell power battery, wherein the hydrogen fuel cell power battery and the pure electric cell power battery are electrically connected to the power drive module respectively; A solid-state hydrogen pool module comprises a hydrogen release unit, a feeding unit, a water supply unit and a hydrogen supply unit, wherein the hydrogen release unit comprises a reactor, a catalyst layer and a first pressure sensor arranged in the reactor, the top and bottom of the reactor are in a conical structure arranged relative to each other, the feeding unit comprises a raw material bin, and a feeding nozzle located on one side of the top of the reactor and connected to the raw material bin, the water supply unit comprises a water tank, a water pump, a water circulation component, and an atomizing nozzle located on the other side of the top of the reactor and having an injection direction opposite to the feeding nozzle, the water tank, the water pump and the atomizing nozzle are connected in sequence, the water circulation component is connected to the tail water discharge end of the hydrogen fuel cell and the water tank, the hydrogen supply unit comprises a slow hydrogen component and an ejection component, the slow hydrogen component is connected to the top of the reactor and the hydrogen fuel cell, the raw material bin is connected to the feeding nozzle through the ejection component, and the ejection component is connected to the reactor, for ejecting the solid-state hydrogen storage material from the raw material bin through the hydrogen introduced into the reactor, and quantitatively injecting the solid hydrogen into the reactor from the feeding nozzle in a gas-solid mixed manner; The vehicle control module is respectively communicatively connected to the power drive module, the power battery module, and the solid-state hydrogen pool module, and the first pressure sensor is respectively linked to the supply rate of the feeding unit, the water supply unit, and the hydrogen supply unit through the vehicle control module.

2. The vehicle power system based on a constant volume solid hydrogen pool according to claim 1, characterized in that: A hydrogen release outlet is provided at the top of the reactor, and the ejector assembly includes a material ejector and a three-way valve, one connecting port on the three-way valve is connected to the hydrogen release outlet, another connecting port on the three-way valve is connected to the hydrogen buffer assembly, the last connecting port on the three-way valve is connected to the working fluid port of the material ejector, the suction port of the material ejector is connected to the raw material bin, and the pressure port of the material ejector is connected to the feed nozzle.

3. The vehicle power system based on a constant volume solid hydrogen pool according to claim 2, characterized in that: The ejection assembly also includes a power air storage chamber and a one-way valve. The three-way valve, the power air storage chamber and the working fluid port of the material ejector are connected in sequence, and the one-way valve is arranged on the pipeline connecting the power air storage chamber and the material ejector.

4. The vehicle power system based on a constant volume solid hydrogen pool according to claim 3, characterized in that: The feeding unit further comprises a crushing box with a built-in crushing mechanism, and the raw material bin, the crushing box and the suction port of the material ejector are connected in sequence; The built-in crushing mechanism of the crushing box is located in the upper half of the crushing box, the raw material bin is connected to the top of the crushing box, and the suction port of the material ejector is connected to the bottom of the crushing box.

5. The vehicle power system based on a constant volume solid hydrogen pool according to claim 2, characterized in that: The vehicle power system also includes a thermal management unit, which includes a coolant compensation tank, a heat dissipation water jacket arranged on the outer surface of the reactor, and a cooling pipeline arranged in the reactor. The coolant compensation tank is pre-stored with cooling medium, a first medium circulation pipeline is arranged between the coolant compensation tank and the heat dissipation water jacket, and a first medium pump is arranged on the first medium circulation pipeline, a second medium circulation pipeline is arranged between the coolant compensation tank and the cooling pipeline, and a second medium pump is arranged on the second medium circulation pipeline, a temperature sensor is arranged in the reactor, and the temperature sensor is respectively linked to the first medium pump and the second medium pump through the vehicle control module.

6. The vehicle power system based on a constant volume solid hydrogen pool according to claim 5, characterized in that: The thermal management unit also includes a heat exchanger, and the first medium circulation pipeline and the second medium circulation pipeline are both connected to the liquid inlet of the coolant compensation tank through the heat exchanger, and a third medium circulation pipeline is arranged between the heat exchanger and the electrochemical reaction chamber of the hydrogen fuel cell. The first heat exchange medium is preset in the third medium circulation pipeline, and a third medium pump is arranged on the third medium circulation pipeline.

7. The vehicle power system based on a constant volume solid hydrogen pool according to claim 6, characterized in that: The hydrogen buffer assembly includes a hydrogen buffer tank, a solid-state hydrogen storage component, and a heating element. The hydrogen buffer tank is a horizontal structure. One end of the hydrogen buffer tank is provided with an air inlet connected to the three-way valve, and the other end of the hydrogen buffer tank is provided with an air outlet connected to the hydrogen inlet side of the hydrogen fuel cell. A second pressure sensor is provided on the pipeline connecting the hydrogen buffer tank and the hydrogen fuel cell, and the second pressure sensor is respectively linked to the supply rate of the feed unit, the water supply unit, and the hydrogen supply unit; The solid-state hydrogen storage component and the heating element are both arranged in the hydrogen buffer tank, and the solid-state hydrogen storage component releases hydrogen through the low-temperature heat provided by the heating element. The heating element includes an electric heater and a fourth medium circulation pipeline arranged between the hydrogen buffer tank and the heat exchanger. The fourth medium circulation pipeline is preset with a second heat exchange medium, and a fourth medium pump is provided on the fourth medium circulation pipeline.

8. The vehicle power system based on a constant volume solid hydrogen pool according to claim 1, characterized in that: The water circulation component includes a first steam-water separator and a second steam-water separator. The first steam-water separator is connected to the anode reaction side of the hydrogen fuel power cell and is used to draw out unreacted water vapor in the anode of the hydrogen fuel power cell. The second steam-water separator is connected to the cathode product side of the hydrogen fuel power cell and is used to draw out the reaction products in the cathode of the hydrogen fuel power cell. The separated liquid outlets of the first steam-water separator and the second steam-water separator are both connected to the water tank.

9. The vehicle power system based on a constant volume solid hydrogen pool according to claim 1, characterized in that: The solid-state hydrogen pool module includes a plurality of hydrogen release units, and each of the hydrogen release units is connected to the feed unit, the water supply unit, and the hydrogen supply unit; The reactors corresponding to the multiple hydrogen release units are configured with the same or different reaction temperatures and catalysts, and the multiple hydrogen release units configured with the same reaction temperature and catalyst constitute a hydrogen release module, and the reaction rates of the hydrogen release units in different hydrogen release modules are increased by configuring different reaction temperatures and catalysts; The solid-state hydrogen pool module also includes a tailings recovery unit, which includes a tailings bin, a tailings pump and a solenoid valve. A tailings discharge port is provided in the middle of the bottom end of the reactor. The solenoid valve is provided in the tailings discharge port, and the solenoid valve is connected to the tailings bin through the tailings pump.

10. A control method for controlling a vehicle power system based on a constant volume solid hydrogen pool according to any one of claims 1 to 9, characterized in that: The control method includes: In response to the target vehicle being powered on in standby mode, the output power of the power drive module is collected in real time according to the current working state of the target vehicle; Converting the output power of the power drive module into the power consumption of the power drive module, and calculating the hydrogen consumption requirement of the hydrogen fuel cell based on the hydrogen-to-electricity conversion efficiency according to the power consumption of the power drive module; When the hydrogen consumption demand of the hydrogen fuel cell meets the demand threshold, triggering control to inject the solid hydrogen storage material in the raw material bin and the water in the water tank into the reactor for hydrogen release reaction; The amount of solid hydrogen storage material and water injected into the reactor is acquired in real time, and the actual hydrogen release efficiency is calculated based on the ideal gas law in combination with the hydrogen release pressure in the reactor acquired in real time by the first pressure sensor; When the hydrogen release pressure in the reactor tends to be stable, the theoretical maximum hydrogen release amount is calculated according to the injection amount of the solid hydrogen storage material and the water injection amount when the hydrogen release pressure is stable, and the target hydrogen release efficiency is calculated in combination with the hydrogen consumption demand; The actual hydrogen release efficiency is matched with the target hydrogen release efficiency in real time, and in response to judging that the actual hydrogen release amount is less than the target hydrogen release efficiency, the trigger control dynamically adjusts the working parameters of the ejector assembly and the water pump until the actual hydrogen release efficiency reaches the target hydrogen release efficiency.

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