Solid hydrogen storage system

Abstract

The utility model provides a solid hydrogen storage system, which comprises a hydrogen storage module, a waste heat recovery module and a waste heat export module, and the hydrogen storage module is respectively connected with a hydrogen source and a user side and is used for storing and releasing hydrogen; the waste heat recovery module is connected to the hydrogen storage module and can recover heat released in the hydrogen filling stage and store the heat through a heat storage working medium. The waste heat leading-out module is connected to the waste heat recovery module, heat stored by the waste heat recovery module is released and utilized, the waste heat leading-out module can be connected with the hydrogen storage module to serve as a heat source in the hydrogen desorption stage, and the waste heat leading-out module can also be connected with other systems with heat energy requirements. Waste heat in the hydrogen charging process is recycled, energy waste is avoided, efficient utilization of energy is achieved through system circulation, the conversion efficiency of a fuel cell can be fully exerted, good market applicability is achieved, the stored waste heat can serve as a heat source to be used for various ways, and the system is simple in overall structure, low in cost, high in practicability and suitable for popularization and application. The application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydrogen fuel cell technical field, specifically relates to a solid hydrogen storage system. BACKGROUND

[0002] Under the "double carbon" goal, hydrogen fuel cell facing renewable energy is one of the most promising high-efficiency "zero carbon" energy technologies, which has important role in distributed power generation system, new energy vehicle and other fields due to high energy conversion rate, high power density, low pollution and other advantages.

[0003] The solid hydrogen storage device of hydrogen fuel cell generates a certain amount of heat during the hydrogen charging stage due to the compression and storage process of hydrogen, and at the same time, during the start and operation stage of hydrogen fuel cell, the solid hydrogen storage device needs to maintain a certain temperature and needs a large amount of heat, and the waste heat during the hydrogen charging stage in the current solid hydrogen storage system is discharged through the cold water tower, which has great waste of heat energy, if the waste heat during the hydrogen charging process of fuel cell is extracted by using heat pump and stored, it can be used as part of heat source for fuel cell start and operation stage or heating, therefore, a suitable heat storage device system is established in the solid hydrogen storage system, which can further improve the energy utilization efficiency. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a solid hydrogen storage system, which recycles and stores the heat generated during the hydrogen charging process through a waste heat recovery module, avoids the waste of waste heat during the hydrogen charging stage, and releases and utilizes the stored heat when needed, which can be used as a heat source for various purposes such as hydrogen discharge stage, the utilization of heat is more flexible, and the utilization efficiency of energy can be effectively improved.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a solid hydrogen storage system, which comprises:

[0006] A hydrogen storage module, the hydrogen storage module comprises:

[0007] A solid hydrogen storage device, one end of which is connected with a hydrogen source through a hydrogen inlet pipe, and the other end is connected with a user end through a hydrogen outlet pipe;

[0008] A heating device, which is connected with the solid hydrogen storage device through a heating circuit, and the heating device heats the solid hydrogen storage device through the heating circuit to realize hydrogen charging or hydrogen discharge;

[0009] A waste heat recovery module, which is connected with the hydrogen storage module, and the heat discharged during the hydrogen charging stage is introduced into the waste heat recovery module and stored through a heat storage working medium.

[0010] In an optional embodiment of the utility model, the solid hydrogen storage device is filled with alloy material, and in the hydrogen filling process, hydrogen gas reacts with the alloy material in the solid hydrogen storage device, stores hydrogen gas and releases heat.

[0011] In an optional embodiment of the utility model, the heating device is a heat conducting oil furnace, the heat conducting oil furnace is connected with the solid hydrogen storage device through a heating loop, the heat conducting oil is heated and heats the hydrogen storage alloy through the heating loop to realize hydrogen filling or hydrogen release.

[0012] In an optional embodiment of the utility model, the waste heat recovery module comprises:

[0013] A heat pump loop is arranged with an air compressor, a condenser, a throttle valve and an evaporator;

[0014] A first oil inlet pipeline is connected with the heating loop at one end and connected with the evaporator at the other end;

[0015] A first oil return pipeline is connected with the evaporator at one end and connected with the heating loop at the other end;

[0016] In the hydrogen filling process, the solid hydrogen storage device releases heat and heats the heat conducting oil, the high-temperature heat conducting oil after heating enters the evaporator through the first oil inlet pipeline to heat the air working medium, and the high-temperature heat conducting oil after temperature reduction flows back to the solid hydrogen storage device through the first oil return pipeline to continue heat absorption;

[0017] In the heat pump loop, the air working medium exchanges heat with the high-temperature heat conducting oil in the evaporator, absorbs heat and enters the air compressor to further increase temperature and pressure, and then enters the condenser to release heat, and the temperature is reduced after heat exchange in the condenser, and the air working medium enters the evaporator through the throttle valve to exchange heat with the high-temperature heat conducting oil.

[0018] In an optional embodiment of the utility model, a first flow distribution valve is arranged at the connection between the first oil inlet pipeline and the heating loop, and a first three-way valve is arranged at the connection between the first oil return pipeline and the heating loop.

[0019] In an optional embodiment of the utility model, the waste heat recovery module further comprises a heat storage loop, a first storage unit and a second storage unit are communicated through the heat storage loop, the condenser is connected between the first storage unit and the second storage unit, and the heat storage working medium enters the condenser from the first storage unit, and then enters the second storage unit after heat exchange with the air working medium.

[0020] In an optional embodiment of the utility model, still be provided with pressure booster between first storage unit with condenser, first storage unit and second storage unit are cold tank and hot tank respectively, low temperature heat storage working medium is stored in cold tank, high temperature heat storage working medium is stored in hot tank.

[0021] In an optional embodiment of the utility model, still include waste heat lead out module, it includes waste heat lead out circuit, it is provided with heat exchanger on it, both ends of waste heat lead out circuit are connected to cold tank and hot tank respectively;

[0022] The high temperature heat storage working medium in the hot tank enters the heat exchanger through the waste heat lead out circuit, becomes the low temperature heat storage working medium after giving out heat and enters the cold tank for storage.

[0023] In an optional embodiment of the utility model, the heat exchanger is connected with the heating circuit through a second oil inlet pipeline and a second oil return pipeline, the heat conducting oil enters the heat exchanger through the second oil inlet pipeline for heating, and then returns to the solid hydrogen storage device through the second oil return pipeline to heat the alloy material and maintain its temperature.

[0024] In an optional embodiment of the utility model, a second flow distribution valve is arranged at the connection between the heating circuit and the second oil inlet pipeline, and a second three-way valve is arranged at the connection between the heating circuit and the second oil return pipeline.

[0025] In an optional embodiment of the utility model, the heat storage working medium is heat conducting oil, molten salt or water.

[0026] In an optional embodiment of the utility model, a hydrogen backflow pipe is further arranged between the hydrogen outlet pipe and the user end, and part of the hydrogen released by the solid hydrogen storage device flows to the heat conducting oil furnace through the hydrogen backflow pipe for heating.

[0027] The utility model discloses a system for hydrogen fuel cell, which comprises a solid hydrogen storage device, a heat pump circuit, a waste heat lead out circuit, a heating circuit and a hydrogen outlet pipe. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0029] Fig. 1 The system structure schematic diagram of the hydrogen charging stage of the solid-state hydrogen storage system in an example of the present application;

[0030] Fig. 2 The system structure schematic diagram of the hydrogen discharging stage of the solid-state hydrogen storage system in an example of the present application.

[0031] Label explanation:

[0032] 100, hydrogen storage module; 200, waste heat recovery module; 300, waste heat leading-out module; 400, hydrogen inlet pipe; 500, hydrogen outlet pipe; 600, hydrogen backflow pipe;

[0033] 110, solid-state hydrogen storage device; 120, heating device; 130, heating circuit;

[0034] 210, heat pump circuit; 220, first oil inlet pipeline; 230, first oil return pipeline; 240, heat storage circuit;

[0035] 211, air compressor; 212, condenser; 213, throttle valve; 214, evaporator;

[0036] 221, first flow distribution valve; 231, first three-way valve;

[0037] 241, first storage unit; 242, booster pump; 243, second storage unit;

[0038] 310, waste heat leading-out circuit; 320, heat exchanger; 330, second oil inlet pipeline; 340, second oil return pipeline;

[0039] 331, second flow distribution valve; 341, second three-way valve;

[0040] 410, hydrogen source; 420, hydrogen absorption valve group; 510, user end; 520, hydrogen discharging valve group. DETAILED DESCRIPTION

[0041] The following embodiments and features of the present application will be described in detail with reference to the drawings. The advantages and effects of the present application can be easily understood by those skilled in the art from the description of the present application. The present application can be implemented or applied in other different embodiments, and the details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0042] It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present application, and only show the components related to the present application in the diagrams, not the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be changed arbitrarily, and the component layout pattern can be more complex.

[0043] Solid-state alloy hydrogen storage is a technology that uses metal alloy and hydrogen reaction to form metal hydride to realize solid-state storage and release of hydrogen. There are two major processes of hydrogen charging and hydrogen releasing. In the hydrogen charging stage, hydrogen enters the gas furnace of the oil furnace heating system, heats the heat conducting oil, and continuously heats the alloy hydrogen storage material in the solid-state hydrogen storage group through the heat conducting oil circulation. When the alloy hydrogen storage material reaches a certain temperature, the gas furnace stops working, hydrogen starts to enter the alloy hydrogen storage material, the system automatically absorbs hydrogen, and the heat conducting oil continues to circulate. The heat released during the hydrogen absorption process is dissipated through the cold water tower, and this part of waste heat is not recovered. In the hydrogen releasing stage, the alloy-based solid-state alloy material needs to be heated to a certain temperature and maintained at a certain temperature, and the alloy material will release hydrogen at a certain rate. This requires an additional heat source, resulting in energy waste of the system.

[0044] Please refer to Figs. 1-2The utility model provides a kind of solid-state hydrogen storage system, including hydrogen storage module 100, waste heat recovery module 200 and waste heat export module 300, hydrogen storage module 100 is connected with hydrogen source 410 by hydrogen inlet pipe 400, and is connected with user end 510 by hydrogen outlet pipe 500, for storing and releasing hydrogen;Waste heat recovery module 200 is connected to hydrogen storage module 100, the heat released by hydrogen storage module 100 in hydrogen filling stage is introduced into waste heat recovery module 200 and is stored by heat storage working medium;Waste heat export module 300 is connected to waste heat recovery module 200, for releasing and utilizing the heat stored in waste heat recovery module 200, waste heat export module 300 can be connected with hydrogen storage module 100, heat is exported to hydrogen storage module 100 as heat source in hydrogen release stage, it can also be connected with other systems with heat energy demand, as heat source for heating or other heat energy demand.By recycling and utilizing waste heat in hydrogen filling process, energy waste is avoided, and efficient use of energy is realized by system circulation, fuel cell conversion efficiency can be fully utilized, with good market application, and the stored waste heat can also be used as heat source for various ways, system overall structure is simple, low in cost, strong in practicality, and wide in application range.

[0045] Please refer to Figs. 1-2 In an optional embodiment of the utility model, hydrogen storage module 100 includes solid-state hydrogen storage device 110 and heating device 120. One end of solid-state hydrogen storage device 110 is connected with hydrogen source 410 by hydrogen inlet pipe 400, and the other end is connected with user end 510 by hydrogen outlet pipe 500, and user end 510 can be fuel cell end, etc.; heating device 120 is connected with solid-state hydrogen storage device 110 by heating circuit 130, and heating device 120 heats solid-state hydrogen storage device 110 by heating circuit 130 to realize hydrogen filling or hydrogen release.

[0046] Please refer to Figs. 1-2 In an optional embodiment of the utility model, solid-state hydrogen storage device 110 is filled with alloy material, and hydrogen gas reacts with alloy material in solid-state hydrogen storage device 110 during hydrogen filling process, stores hydrogen gas and releases heat; heating device 120 is heat conducting oil furnace, and heat conducting oil furnace is connected with solid-state hydrogen storage device 110 by heating circuit 130, heat conducting oil is heated and heats hydrogen storage alloy by heating circuit 130 to realize hydrogen filling or hydrogen release.

[0047] Please refer to Figs. 1-2In the optional embodiment of the utility model, still be provided with hydrogen backflow pipe 600 between hydrogen outlet pipe 500 and user end 510, part hydrogen of solid hydrogen storage device 110 release flows to heat conducting oil furnace to heat through hydrogen backflow pipe 600, so that can maintain the temperature in solid hydrogen storage device 110, guarantee stable circulation of hydrogen release stage. In hydrogen charging stage, hydrogen from hydrogen source 410 enters solid hydrogen storage device 110 through hydrogen absorption valve group 420, heat conducting oil is heated using heat conducting oil furnace, alloy material in solid hydrogen storage device 110 is heated through heat conducting oil, stop heating after reaching hydrogen charging temperature, hydrogen gas and alloy material react and are stored in alloy material, heat is released in hydrogen charging process, the part heat is recovered and stored using waste heat recovery module 200, and heat is exported using waste heat export module 300; when user end 510 needs hydrogen source 410 in hydrogen release stage, the recovered heat is imported into hydrogen storage module 100 using waste heat export module 300, is used as heat source to heat heat conducting oil, alloy material is heated through heat conducting oil, solid hydrogen storage module 100 starts to release hydrogen through hydrogen release valve group 520 when reaching hydrogen release temperature, part hydrogen is supplied to user end 510, part hydrogen enters heat conducting oil furnace through hydrogen backflow pipe 600 to heat heat conducting oil, maintain the temperature in solid hydrogen storage device 110, guarantee stable hydrogen release process.

[0048] Please refer to Figs. 1-2 In the optional embodiment of the utility model, waste heat recovery module 200 is connected to hydrogen storage module 100, the heat released in hydrogen charging stage is imported into waste heat recovery module 200 and is stored through heat storage working medium, and waste heat recovery module 200 includes heat pump circuit 210, first oil inlet pipeline 220, first oil return pipeline 230 and heat storage circuit 240. Air compressor 211, condenser 212, throttle valve 213 and evaporator 214 are arranged on heat pump circuit 210, heat is transferred through the circulation of air working medium, one end of first oil inlet pipeline 220 is connected to heating circuit 130, the other end is connected to evaporator 214, one end of first oil return pipeline 230 is connected to evaporator 214, the other end is connected to heating circuit 130, and high-temperature heat conducting oil in heating circuit 130 is imported and heat exchanged with air working medium, heat storage circuit 240 is connected with condenser 212 on heat pump circuit 210, and heat is stored through the heat exchange of heat storage working medium and air working medium.

[0049] Please refer to Figs. 1-2In the optional embodiment of the utility model, first oil inlet pipeline 220 and heating circuit 130's joint is provided with first flow distribution valve 221, first oil return pipeline 230 and heating circuit 130's joint is provided with first three-way valve 231, to control the circulation of heat conducting oil, when hydrogen filling initial stage, heat conducting oil is heated and is heated to solid hydrogen storage device 110 through the circulation of heat conducting oil in heating circuit 130, when reaching hydrogen filling temperature, stop heating heat conducting oil, hydrogen and alloy material release heat when reacting in hydrogen filling process, heat conducting oil in heating circuit 130 is heated, when opening first flow distribution valve 221, heat conducting oil is guided to the circulation of first oil inlet pipeline 220 and first oil return pipeline 230, high temperature heat conducting oil in solid hydrogen storage device 110 enters evaporator 214 through first oil inlet pipeline 220 and heats air working medium, high temperature heat conducting oil temperature reduces, and enters solid hydrogen storage device 110 through first oil return pipeline 230 and first three-way valve 231 and continues to absorb heat, and realizes heat exchange through the circulation of first oil inlet pipeline 220 and first oil return pipeline 230 between solid hydrogen storage device 110 and evaporator 214.

[0050] Please refer to Figs. 1-2 In the optional embodiment of the utility model, first storage unit 241 and second storage unit 243 are connected through heat storage circuit 240, booster pump 242 is arranged between first storage unit 241 and condenser 212, is used for guiding out low temperature and low pressure heat storage medium in first storage unit 241, condenser 212 is connected between first storage unit 241 and second storage unit 243, heat storage medium enters condenser 212 from first storage unit 241, and after heat exchange with air working medium, enters second storage unit 243 again.

[0051] Please refer to Figs. 1-2 In the optional embodiment of the utility model, first storage unit 241 and second storage unit 243 are connected through heat storage circuit 240, booster pump 242 is arranged between first storage unit 241 and condenser 212, is used for guiding out low temperature and low pressure heat storage medium in first storage unit 241, condenser 212 is connected between first storage unit 241 and second storage unit 243, heat storage medium enters condenser 212 from first storage unit 241, and after heat exchange with air working medium, enters second storage unit 243 again.

[0052] Please refer to Figs. 1-2In the optional embodiment of the utility model, in the hydrogen filling process, the solid hydrogen storage device 110 releases heat and heats the heat conducting oil, the high temperature heat conducting oil after heating enters the evaporator 214 through the first oil inlet pipeline 220 to heat the air working substance, the high temperature heat conducting oil temperature reduces and then flows back to the solid hydrogen storage device 110 through the first oil return pipeline 230 to continue heat absorption; on the heat pump circuit 210, the air working substance exchanges heat with the high temperature heat conducting oil in the evaporator 214, enters the air compressor 211 to further improve the temperature and pressure after heat absorption, then enters the condenser 212 to release heat, the temperature reduces after heat exchange in the condenser 212, enters the evaporator 214 through the throttle valve 213 to exchange heat with the high temperature heat conducting oil; on the heat storage circuit 240, the low temperature heat storage working substance in the cold tank is introduced into the condenser 212 through the booster pump 242, exchanges heat with the high temperature air working substance, becomes high temperature heat storage working substance after heating and flows to the hot tank to store.

[0053] Please refer to Figs. 1-2 In the optional embodiment of the utility model, the waste heat leading-out module 300 includes a waste heat leading-out circuit 310, which is provided with a heat exchanger 320, and the two ends of the waste heat leading-out circuit 310 are connected to the cold tank and the hot tank respectively; the high temperature heat storage working substance in the hot tank enters the heat exchanger 320 through the waste heat leading-out circuit 310, becomes low temperature heat storage working substance after releasing heat and enters the cold tank to store.

[0054] Please refer to Figs. 1-2In an optional embodiment of the present application, the heat exchanger 320 is connected with the heating circuit 130 through the second oil inlet pipeline 330 and the second oil return pipeline 340, the heat conducting oil enters the heat exchanger 320 through the second oil inlet pipeline 330 for heating, and then returns to the solid-state hydrogen storage device 110 through the second oil return pipeline 340 to heat the alloy material and maintain the temperature thereof. In the hydrogen release stage, the alloy material in the solid-state hydrogen storage device 110 needs to be maintained at a certain temperature, and hydrogen can be released at a certain rate, at this time, the recovered heat in the hydrogen charging stage is released through the waste heat leading-out circuit 310 and is used to heat the heat conducting oil, the heat conducting oil enters the solid-state hydrogen storage device 110 to release heat, so as to maintain the alloy material at a certain temperature, and stable hydrogen release can be realized. Specifically, the heat conducting oil enters the heat exchanger 320 through the second oil inlet pipeline 330, the high-temperature heat storage medium in the hot tank enters the heat exchanger 320 to heat the heat conducting oil, the high-temperature heat storage medium becomes low-temperature heat storage medium through the waste heat leading-out circuit 310 and enters the cold tank for storage, the high-temperature heat conducting oil after heating returns to the heating circuit 130 through the second oil return pipeline 340, and enters the solid-state hydrogen storage device 110 to release heat, so as to maintain the alloy material at a certain temperature, maintain stable operation of the system, and the cold heat conducting oil after heat exchange continues to be heat-exchanged through the waste heat leading-out circuit 310. It can be understood that the heat stored in the heat storage circuit 240 can be flexibly applied according to actual needs, in other embodiments, the waste heat leading-out circuit 310 can also be connected with a heating system or other systems requiring heat, and serves as a heat source to provide required heat energy for other systems.

[0055] Please refer to Figs. 1-2 In an optional embodiment of the present application, the connection between the heating circuit 130 and the second oil inlet pipeline 330 is provided with a second flow distribution valve 331, the connection between the heating circuit 130 and the second oil return pipeline 340 is provided with a second three-way valve 341, and the circulation of the heat conducting oil is controlled through the valves. When the valve on the second oil inlet pipeline 330 is closed, the circulation of each module is not affected; when the heat conducting oil needs to be heated in the hydrogen release stage, the second flow distribution valve 331 is opened to open the second oil inlet pipeline 330 and the second oil return pipeline 340, the heat conducting oil is circulated and heat-exchanged through the second oil inlet pipeline 330 and the second oil return pipeline 340, the temperature of the solid-state hydrogen storage device 110 is maintained, and the stability of the system is maintained.

[0056] Please refer to Figs. 1-2 In an optional embodiment of the present application, the solid-state hydrogen storage device 110 and the heat exchanger 320 can also be provided with temperature sensors and be externally connected with control modules, so as to ensure accurate control of the temperature in the hydrogen storage module 100 in the hydrogen charging stage and the hydrogen release stage.

[0057] Please refer to Figs. 1-2In the optional embodiment of the utility model, when hydrogen fuel cell charges hydrogen, hydrogen enters solid hydrogen storage device 110, heating conducting oil and heating alloy material through heating circuit 130, hydrogen and alloy material react to store hydrogen after alloy material reaches certain temperature, stop heating at this moment, release heat while storing hydrogen, conducting oil in circuit is heated, open first flow distribution valve 221 on first oil inlet pipeline 220, guide high temperature conducting oil into evaporator 214, heat air working substance, the temperature of heated conducting oil reduces, enter solid hydrogen storage device 110 through first oil return pipeline 230 and first three-way valve 231 to continue heat absorption and realize circulation;In heat pump circuit 210, high temperature conducting oil from solid hydrogen storage device 110 is used as heat source, absorbs this part of heat and transfers to circulating air working substance through evaporator 214, air absorbs heat and temperature rises, enter air compressor 211 to further improve the temperature and pressure of circulating air, heat and raise the temperature of heat storage working substance from cold tank in condenser 212 and store in hot tank, the temperature of compressed air reduces after heat exchange in condenser 212, flow through throttle valve 213 and heat exchange with high temperature conducting oil in evaporator 214, realize circulation.

[0058] In the hydrogen release stage of hydrogen fuel cell, alloy material in solid hydrogen storage device 110 needs to maintain certain temperature, hydrogen can be released at certain rate, part of released hydrogen supplies fuel cell, part of released hydrogen heats conducting oil furnace and heating circuit 130, the heat needed in hydrogen release stage of hydrogen fuel cell is provided by heat recovered by waste heat recovery module 200, open second flow distribution valve 331, conducting oil enters heat exchanger 320 through second oil inlet pipeline 330, heat storage working substance in hot tank enters heat exchanger 320 through waste heat export circuit 310 to heat cold conducting oil, conducting oil reaches certain temperature and returns to solid hydrogen storage device 110 through second oil return pipeline 340 to release heat, maintain alloy material temperature, keep system stable operation, cold conducting oil after heat exchange enters heat exchanger 320 through second oil inlet pipeline 330 to continue heat absorption, realize circulation.

[0059] In summary, in the solid hydrogen storage system of the utility model, waste heat in hydrogen charging process is recovered through heat pump system and is stored by heat storage working substance, can be used as heat source in hydrogen release stage, realizes energy recycling, saves the heat of conducting oil furnace, circulates stably between each module, effectively reduces energy waste, improves the energy utilization efficiency of the whole system;The whole system has simple structure, and the heat storage working substance has low cost and is easy to store, has good practicality;The system can fully exert the conversion efficiency of fuel cell, can be widely used in hydrogen fuel cell industry, has good market application property;The recovered and stored waste heat can also be used in multiple ways, is flexible to use, has high energy utilization rate and wide application range.

[0060] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not intended to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed by the present application should be covered by the claims of the present application.

[0061] In the description of the present application, numerous specific details are provided, such as examples of components and / or methods, to provide a thorough understanding of embodiments of the present application. Persons of ordinary skill in the art will recognize, however, that the application can be practiced without one or more of the specific details. In other instances, well-known structures, materials, or operations are not shown or described in detail in order to avoid obscuring aspects of the embodiments of the application.

[0062] Reference throughout this specification to "an embodiment", "embodiments" or "certain embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application and is not necessarily included in all embodiments. Thus, the appearances of the phrase "in one embodiment", "in an embodiment", or "in certain embodiments" in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It is understood that other variations and modifications of the applications described and illustrated herein can be made based on the teachings herein, and are therefore considered to be a part of the spirit and scope of the applications.

[0063] It is also to be understood that one or more of the elements of the drawings shown can be implemented in a more separated or more integrated manner, or even removed, as is known in certain cases, or provided, as can be useful in certain applications.

[0064] In addition, unless explicitly stated otherwise, any directional arrows herein are to be understood in a generic and illustrative sense only and not as limiting. Additionally, unless otherwise stated, the use herein of the term "or" generally means "and / or". Combinations of components or steps will also be considered as being noted, particularly if that combination is included in the art as an equivalent.

[0065] As used in the description of the application and throughout the claims that follow, unless otherwise indicated, the word "a" or "an" means "one or more." Also, as used in the description of the application and throughout the claims that follow, unless otherwise indicated, the phrase "in an embodiment" or "in certain embodiments" is intended to mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the application and is not necessarily included in all embodiments. Thus, the appearances of the phrase "in an embodiment" or "in certain embodiments" in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It is understood that other variations and modifications of the applications described and illustrated herein can be made based on the teachings herein, and are therefore considered to be a part of the spirit and scope of the applications.

[0066] The above description of the illustrated embodiments of the application (including what is described in the abstract) is not intended to be exhaustive or to limit the application to the precise forms disclosed. While specific embodiments of, and examples for, the application are described herein for illustrative purposes, various equivalent modifications are possible within the spirit and scope of the application, as those skilled in the relevant art will recognize and appreciate. As indicated, these modifications can be made to the above described embodiments of the application and yet the application will fall within the scope of the application. Accordingly, one or more features can be implemented to one or more embodiments of the application without being limited to only a single or a particular set of the features described.

[0067] The systems and methods have been described generally herein as facilitating an understanding of the details of the application. Moreover, various specific details have been given for providing an overall understanding of the embodiments of the application. One skilled in the relevant art will understand, however, that the application can be practiced without one or more of the specific details or with other apparatus, systems, assemblies, methods, components, materials, parts, and the like. In other instances, well-known structures, materials, and / or operations have not been shown or described in detail to avoid obscuring aspects of the embodiments of the application.

[0068] Accordingly, although the application has been described herein in reference to its specific embodiments, it is not intended that the application be limited to these embodiments. Rather, it is intended to cover all modifications and alternatives within the scope of the application. It should be understood, therefore, that various modifications, equivalences and substitutions can be made by those skilled in the art without departing from the spirit and scope of the application as set forth in the following claims. Accordingly, many modifications can be made in carrying out the application as set forth in the foregoing description and accompanying claims, while the application remains true to its spirit. The scope of the application is therefore intended to be limited only by the appended claims.

Claims

1. A solid-state hydrogen storage system, characterized in that, include: Hydrogen storage module, the hydrogen storage module comprising: A solid-state hydrogen storage device, one end of which is connected to a hydrogen source via a hydrogen inlet pipe, and the other end of which is connected to a user via a hydrogen outlet pipe; A heating device is connected to the solid hydrogen storage device via a heating circuit. The heating device heats the solid hydrogen storage device via the heating circuit to achieve hydrogen filling or releasing. The waste heat recovery module is connected to the hydrogen storage module. The heat released during the hydrogen charging stage is introduced into the waste heat recovery module and stored through the heat storage medium.

2. The solid-state hydrogen storage system according to claim 1, characterized in that, The solid hydrogen storage device is filled with alloy material. During the hydrogen filling process, hydrogen reacts with the alloy material in the solid hydrogen storage device to store hydrogen and release heat.

3. The solid-state hydrogen storage system according to claim 1, characterized in that, The heating device is a thermal oil furnace, which is connected to the solid hydrogen storage device through a heating circuit. The thermal oil is heated and then heated through the heating circuit to heat the hydrogen storage alloy, thereby achieving hydrogen charging or decharging.

4. The solid-state hydrogen storage system according to claim 3, characterized in that, The waste heat recovery module includes: A heat pump circuit, wherein an air compressor, a condenser, a throttle valve and an evaporator are provided; The first oil inlet pipe has one end connected to the heating circuit and the other end connected to the evaporator; The first return oil line is connected at one end to the evaporator and at the other end to the heating circuit; During the hydrogen charging process, the solid hydrogen storage device releases heat and heats the heat transfer oil. The heated high-temperature heat transfer oil enters the evaporator through the first oil inlet pipe to heat the air working fluid. After the temperature of the high-temperature heat transfer oil decreases, it flows back to the solid hydrogen storage device through the first oil return pipe to continue absorbing heat. In the heat pump circuit, the air working fluid exchanges heat with the high-temperature heat transfer oil in the evaporator, absorbs heat, and then enters the air compressor to further increase its temperature and pressure. It then enters the condenser to release heat, and after heat exchange in the condenser, its temperature decreases. It then enters the evaporator through the throttling valve to exchange heat with the high-temperature heat transfer oil.

5. The solid-state hydrogen storage system according to claim 4, characterized in that, A first flow distribution valve is provided at the connection between the first oil inlet pipeline and the heating circuit, and a first three-way valve is provided at the connection between the first oil return pipeline and the heating circuit.

6. The solid-state hydrogen storage system according to claim 4, characterized in that, The waste heat recovery module also includes a heat storage circuit. The first storage unit and the second storage unit are connected through the heat storage circuit. The condenser is connected between the first storage unit and the second storage unit. The heat storage medium enters the condenser from the first storage unit, exchanges heat with the air medium, and then enters the second storage unit.

7. The solid-state hydrogen storage system according to claim 6, characterized in that, A booster pump is also provided between the first storage unit and the condenser. The first storage unit and the second storage unit are a cold tank and a hot tank, respectively. The low-temperature heat storage medium is stored in the cold tank, and the high-temperature heat storage medium is stored in the hot tank.

8. The solid-state hydrogen storage system according to claim 7, characterized in that, It also includes a waste heat removal module, which includes a waste heat removal circuit and a heat exchanger thereon. The two ends of the waste heat removal circuit are respectively connected to the cold tank and the hot tank. The high-temperature heat storage medium in the hot tank enters the heat exchanger through the waste heat extraction circuit, releases heat, becomes the low-temperature heat storage medium, and enters the cold tank for storage.

9. The solid-state hydrogen storage system according to claim 8, characterized in that, The heat exchanger is connected to the heating circuit via a second oil inlet pipe and a second oil return pipe. The heat transfer oil enters the heat exchanger through the second oil inlet pipe for heating and then returns to the solid hydrogen storage device through the second oil return pipe to heat the alloy material and maintain its temperature.

10. The solid-state hydrogen storage system according to claim 9, characterized in that, A second flow distribution valve is provided at the connection between the heating circuit and the second oil inlet pipe, and a second three-way valve is provided at the connection between the heating circuit and the second oil return pipe.

11. The solid-state hydrogen storage system according to claim 6, characterized in that, The heat storage medium is heat transfer oil, molten salt, or water.

12. The solid-state hydrogen storage system according to claim 3, characterized in that, A hydrogen return pipe is also provided between the hydrogen outlet pipe and the user terminal. Part of the hydrogen released by the solid hydrogen storage device flows to the thermal oil furnace through the hydrogen return pipe for heating.

Images