A control unit and control method for a mobile hydrogen supply system

Abstract

The present invention is applicable to the technical field of hydrogen supply system control, and provides a control unit and control method for a mobile hydrogen supply system, wherein the control unit includes a first controllable valve, a second controllable valve, a third controllable valve, a fourth controllable valve, a fifth controllable valve, a sixth controllable valve, a seventh controllable valve and a safety valve. The control unit can select a hydrogen supply method according to different needs. When hydrogen is added externally, the hydrogen storage end supplies hydrogen to the fuel cell end, and the hydrogen generation end supplies hydrogen to the hydrogenator for external hydrogenation; when there is no hydrogen at the hydrogen storage end, the hydrogen generation end can supply hydrogen to the fuel cell end through the hydrogen generation end, and hydrogen is added to the hydrogen storage end at the same time. The organic liquid hydrogen storage technology is organically combined with a fuel cell extended-range vehicle through the control unit, which can be used as a mobile hydrogenation station, effectively solving the problems of difficulty in hydrogenation of hydrogen-powered vehicles, field hydrogenation, hydrogenation for three high tests, and limited operation routes.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen supply system control, and in particular relates to a control unit and a control method for a mobile hydrogen supply system. Background Art

[0002] With the rapid development of hydrogen energy, the number of hydrogen-powered vehicles is increasing, but the current situation of a small number of hydrogen refueling stations, remote locations, and high costs for new hydrogen refueling stations cannot be effectively improved. As a result, hydrogen-powered vehicles have long refueling distances, fixed routes, and long queues at hydrogen refueling stations. When vehicles are tested in high temperatures, cold weather, and high altitudes, they need to go to remote areas, where there are problems such as poor infrastructure and no hydrogen refueling stations.

[0003] Organic liquid hydrogen storage technology uses the reversible reaction of unsaturated liquid organic matter and hydrogen to achieve hydrogen storage and release. Hydrogenation reaction achieves hydrogen storage, and dehydrogenation reaction achieves hydrogen release. The mass hydrogen storage density is high. The hydrogen storage material is liquid organic matter, which is non-hazardous chemical. It can be transported and stored as ordinary cargo at normal temperature and pressure. The mobile hydrogen supply system developed on this basis can effectively solve the above problems.

[0004] In the existing technology, mobile hydrogen supply systems based on organic liquid hydrogen storage technology are mostly composed of an organic liquid hydrogen storage system, a fuel cell system and a hydrogen refueling machine. Hydrogen is generated by the organic liquid hydrogen storage system, and then distributed to the fuel cell and the hydrogen refueling machine, which can not only provide kinetic energy for the mobile hydrogen supply system, but also provide hydrogen for external equipment.

[0005] However, how to reasonably distribute the hydrogen generated by the liquid hydrogen storage system to the fuel cell system and the hydrogen refueling machine is one of the key points in the current mobile hydrogen supply system. Therefore, a control unit for a mobile hydrogen supply system is provided to solve this problem through a simple structure and a corresponding control method. Summary of the invention

[0006] The purpose of the embodiments of the present invention is to provide a control unit and a control method for a mobile hydrogen supply system, aiming to solve the problems raised in the above-mentioned background technology.

[0007] The embodiment of the present invention is implemented as follows: a control unit for a mobile hydrogen supply system, comprising a first controllable valve, a second controllable valve, a third controllable valve, a fourth controllable valve, a fifth controllable valve, a sixth controllable valve, a seventh controllable valve and a safety valve;

[0008] One end of the first controllable valve is connected to a hydrogen generating end in a mobile hydrogen supply system through a pipeline, so as to receive hydrogen generated by the mobile hydrogen supply system, the other end of the first controllable valve is connected to a second controllable valve through a pipeline, and the other end of the second controllable valve is connected to a fuel cell end in the mobile hydrogen supply system through a pipeline;

[0009] One end of the third controllable valve and the fourth controllable valve are both connected to the pipeline between the first controllable valve and the second controllable valve through a pipeline, the other end of the third controllable valve is connected to the hydrogen storage end of the mobile hydrogen supply system, and the other end of the fourth controllable valve is connected to the hydrogenator through a pipeline;

[0010] One end of the fifth controllable valve is connected to the hydrogen storage end through a pipeline, and the other end of the fifth controllable valve is connected to the pipeline between the second controllable valve and the fuel cell end through a pipeline;

[0011] One end of the safety valve is connected to the pipeline between the fourth controllable valve and the hydrogenator, and the other end of the safety valve is connected to the vent through a pipeline;

[0012] One end of the sixth controllable valve is connected to nitrogen, and the other end of the sixth controllable valve is connected to the seventh controllable valve through a pipeline. The other end of the seventh controllable valve is connected to the pipeline between the safety valve and the vent, and the pipeline between the sixth controllable valve and the seventh controllable valve is also connected to the pipeline between the first controllable valve and the second controllable valve.

[0013] According to a further technical solution, the first controllable valve, the second controllable valve, the third controllable valve, the fourth controllable valve, the fifth controllable valve, the sixth controllable valve and the seventh controllable valve may be switch valves that can be controlled to open and close, such as electric control valves and pneumatic valves; wherein the second controllable valve is a pressure reducing valve.

[0014] According to a further technical solution, the safety valve is a mechanical safety valve.

[0015] Another object of an embodiment of the present invention is to provide a control method for a mobile hydrogen supply system. Based on the above-mentioned control unit for the mobile hydrogen supply system, the external hydrogen supply control process of the control unit includes the following steps:

[0016] Step 1: After the mobile hydrogen supply system is started, an external hydrogen supply request is received and the first controllable valve is opened;

[0017] Step 2: Determine whether the hydrogen generating end supplies hydrogen to the control unit, if so, proceed to the next step; if not, the hydrogen storage end supplies hydrogen to the control unit, and opens the fifth controllable valve to supply hydrogen for the operation of the fuel cell end;

[0018] Step 3: The hydrogen generating end supplies hydrogen to the control unit, opens the second controllable valve, and supplies hydrogen to the fuel cell end;

[0019] Step 4: Determine whether the hydrogen generating end is supplying hydrogen to the hydrogen refueling machine. If so, open the fourth controllable valve to supply hydrogen to the hydrogen refueling machine to refuel the external hydrogen-powered vehicle.

[0020] If not, determine whether the hydrogen generation end is replenishing hydrogen for the hydrogen storage end. If so, open the third controllable valve to add hydrogen to its own hydrogen storage end; if not, shut down the system.

[0021] According to a further technical solution, when the mobile hydrogen supply system is shut down, the purge process of the control unit includes the following steps:

[0022] Step a: opening the first controllable valve, the second controllable valve, the third controllable valve, the fourth controllable valve and the seventh controllable valve to discharge the hydrogen in the pipeline to the atmosphere, and reducing the pressure to atmospheric pressure;

[0023] Step b: closing the seventh controllable valve and simultaneously opening the sixth controllable valve, so that the pipeline is filled with nitrogen through the sixth controllable valve;

[0024] Step c: close the sixth controllable valve, keep other valves unchanged, open the seventh controllable valve, and exhaust the mixed gas;

[0025] Step d: After repeating the above operation 2 to 3 times, close the sixth controllable valve, the seventh controllable valve, the first controllable valve, the second controllable valve, the third controllable valve and the fourth controllable valve to complete the purging operation.

[0026] The embodiment of the present invention provides a control unit and control method for a mobile hydrogen supply system. The control unit can select a hydrogen supply method according to different needs. When hydrogen is added externally, the hydrogen storage end supplies hydrogen to the fuel cell end, and the hydrogen generation end supplies hydrogen to the hydrogen filling machine for external hydrogenation. When there is no hydrogen at the hydrogen storage end, the hydrogen generation end can supply hydrogen to the fuel cell end and add hydrogen to the hydrogen storage end at the same time. The organic liquid hydrogen storage technology is organically combined with the fuel cell extended-range vehicle through the control unit, which can be used as a mobile hydrogen filling station to replace the existing fixed hydrogen filling stations. The high hydrogen storage capacity, high safety and convenient energy replenishment of the organic liquid hydrogen storage technology can be used to solve the problems of difficulty in hydrogenation of hydrogen vehicles, field hydrogenation, three-high test hydrogenation and limited operation routes. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a control unit for a mobile hydrogen supply system provided by an embodiment of the present invention;

[0028] Figure 2 An external hydrogen supply control process of a control unit for a mobile hydrogen supply system provided in an embodiment of the present invention;

[0029] Figure 3 This is a structural diagram of the mobile hydrogen supply system.

[0030] In the attached drawings: a first controllable valve 1; a second controllable valve 2; a third controllable valve 3; a fourth controllable valve 4; a fifth controllable valve 5; a sixth controllable valve 6; a seventh controllable valve 7; and a safety valve 8. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0033] like Figure 1 As shown, a control unit for a mobile hydrogen supply system provided by an embodiment of the present invention includes a first controllable valve 1, a second controllable valve 2, a third controllable valve 3, a fourth controllable valve 4, a fifth controllable valve 5, a sixth controllable valve 6, a seventh controllable valve 7 and a safety valve 8;

[0034] One end of the first controllable valve 1 is connected to the hydrogen generating end in the mobile hydrogen supply system through a pipeline, and is used to receive the hydrogen generated by the mobile hydrogen supply system. The other end of the first controllable valve 1 is connected to the second controllable valve 2 through a pipeline, and the other end of the second controllable valve 2 is connected to the fuel cell end in the mobile hydrogen supply system through a pipeline.

[0035] One end of the third controllable valve 3 and the fourth controllable valve 4 are connected to the pipeline between the first controllable valve 1 and the second controllable valve 2 through a pipeline, the other end of the third controllable valve 3 is connected to the hydrogen storage end of the mobile hydrogen supply system, and the other end of the fourth controllable valve 4 is connected to the hydrogenator through a pipeline;

[0036] One end of the fifth controllable valve 5 is connected to the hydrogen storage end through a pipeline, and the other end of the fifth controllable valve 5 is connected to the pipeline between the second controllable valve 2 and the fuel cell end through a pipeline;

[0037] One end of the safety valve 8 is connected to the pipeline between the fourth controllable valve 4 and the hydrogenator, and the other end of the safety valve 8 is connected to the vent through a pipeline;

[0038] One end of the sixth controllable valve 6 is connected to nitrogen, and the other end of the sixth controllable valve 6 is connected to the seventh controllable valve 7 through a pipeline. The other end of the seventh controllable valve 7 is connected to the pipeline between the safety valve 8 and the vent, and the pipeline between the sixth controllable valve 6 and the seventh controllable valve 7 is also connected to the pipeline between the first controllable valve 1 and the second controllable valve 2.

[0039] In the embodiment of the present invention, when in use, the hydrogen generation end of the mobile hydrogen supply system releases hydrogen to the fuel cell end. After the hydrogen generation end is started, the control unit receives the hydrogen supplied by the hydrogen generation end.

[0040] When hydrogen is to be supplied to the fuel cell end, the first controllable valve 1 and the second controllable valve 2 are opened, and the hydrogen flows through the first controllable valve 1 and the second controllable valve 2 to be supplied to the fuel cell end.

[0041] When hydrogen is to be supplied to the hydrogen filling machine, the first controllable valve 1 and the fourth controllable valve 4 are opened, and the hydrogen flows through the first controllable valve 1 and the fourth controllable valve 4 to be supplied to the hydrogen filling machine, and then the hydrogen is filled after being connected to an external hydrogen-powered vehicle.

[0042] When hydrogen is to be added to the hydrogen storage end, the first controllable valve 1 and the third controllable valve 3 are opened, and hydrogen flows through the first controllable valve 1 and the third controllable valve 3 to add hydrogen to the hydrogen storage end, thereby realizing hydrogen storage.

[0043] While the hydrogen generation end supplies hydrogen to the fuel cell end, the hydrogen storage end can also supply hydrogen to the fuel cell end synchronously. It is only necessary to open the fifth controllable valve 5 synchronously while opening the first controllable valve 1 and the second controllable valve 2. The hydrogen at the hydrogen storage end can flow through the fifth controllable valve 5 and be supplied to the fuel cell end.

[0044] In addition, when the mobile hydrogen supply system is shut down, the control unit needs to be purged. Specifically, open the first controllable valve 1, the second controllable valve 2, the third controllable valve 3, the fourth controllable valve 4 and the seventh controllable valve 7, discharge the hydrogen in the pipeline to the atmosphere, and reduce the pressure to atmospheric pressure. Then close the seventh controllable valve 7, and simultaneously open the sixth controllable valve 6, and fill the pipeline with nitrogen through the sixth controllable valve 6. Then close the sixth controllable valve 6, keep the other valves unchanged, open the seventh controllable valve 7, and discharge the mixed gas. After repeating the above operation 2 to 3 times, close the sixth controllable valve 6, the seventh controllable valve 7, the first controllable valve 1, the second controllable valve 2, the third controllable valve 3 and the fourth controllable valve 4, and the purging operation is completed.

[0045] The control unit can be used to select the hydrogen supply method according to different needs. When hydrogen is added externally, the hydrogen storage end supplies hydrogen to the fuel cell end, and the hydrogen generation end supplies hydrogen to the hydrogen filling machine for external hydrogen addition. When there is no hydrogen at the hydrogen storage end, the hydrogen generation end can supply hydrogen to the fuel cell end and add hydrogen to the hydrogen storage end at the same time. When the hydrogen generation end adds hydrogen to the hydrogen storage end, the hydrogen generation end can also supply hydrogen to the fuel cell end.

[0046] As a preferred embodiment of the present invention, the first controllable valve 1, the second controllable valve 2, the third controllable valve 3, the fourth controllable valve 4, the fifth controllable valve 5, the sixth controllable valve 6 and the seventh controllable valve 7 can be switch valves that can be controlled to open and close, such as electric control valves and pneumatic valves; wherein the second controllable valve 2 is a pressure reducing valve.

[0047] As a preferred embodiment of the present invention, the safety valve 8 is a mechanical safety valve.

[0048] As a preferred embodiment of the present invention, the specific composition of the mobile hydrogen supply system is as follows: Figure 3 As shown, the hydrogen generation end corresponds to a hydrogen-containing organic liquid tank, a dehydrogenated organic liquid tank, an organic liquid dehydrogenation unit and a hydrogen compression unit; the hydrogen storage end is the on-board hydrogen storage unit; the fuel cell end corresponds to the fuel cell system; the control unit is respectively connected to the hydrogen compression unit, the on-board hydrogen storage unit, the fuel cell system and the hydrogen refueling machine to distribute the hydrogen.

[0049] like Figure 2 As shown, another embodiment of the present invention provides a control method for a mobile hydrogen supply system, based on the above-mentioned control unit for the mobile hydrogen supply system, the external hydrogen supply control process of the control unit includes the following steps:

[0050] Step 1: After the mobile hydrogen supply system is started, an external hydrogen supply request is received and the first controllable valve 1 is opened;

[0051] Step 2: Determine whether the hydrogen generating end supplies hydrogen to the control unit, if so, proceed to the next step; if not, the hydrogen storage end supplies hydrogen to the control unit, and opens the fifth controllable valve 5 to supply hydrogen for the operation of the fuel cell end;

[0052] Step 3: The hydrogen generating end supplies hydrogen to the control unit, opens the second controllable valve 2, and supplies hydrogen to the fuel cell end;

[0053] Step 4: Determine whether the hydrogen generating end is supplying hydrogen to the hydrogen refueling machine. If so, open the fourth controllable valve 4 to supply hydrogen to the hydrogen refueling machine to refuel the external hydrogen-powered vehicle.

[0054] If not, it is determined whether the hydrogen generating end is replenishing hydrogen for the hydrogen storage end. If so, the third controllable valve 3 is opened to add hydrogen to its own hydrogen storage end; if not, the system is closed.

[0055] As a preferred embodiment of the present invention, when the mobile hydrogen supply system is shut down, the purge process of the control unit includes the following steps:

[0056] Step a: opening the first controllable valve 1, the second controllable valve 2, the third controllable valve 3, the fourth controllable valve 4 and the seventh controllable valve 7 to discharge the hydrogen in the pipeline to the atmosphere, and reducing the pressure to atmospheric pressure;

[0057] Step b: closing the seventh controllable valve 7 and simultaneously opening the sixth controllable valve 6, so that the pipeline is filled with nitrogen through the sixth controllable valve 6;

[0058] Step c: close the sixth controllable valve 6, keep other valves unchanged, open the seventh controllable valve 7, and exhaust the mixed gas;

[0059] Step d: After repeating the above operation 2 to 3 times, close the sixth controllable valve 6, the seventh controllable valve 7, the first controllable valve 1, the second controllable valve 2, the third controllable valve 3 and the fourth controllable valve 4 to complete the purging operation.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A control unit for a mobile hydrogen supply system, characterized in that: It includes a first controllable valve, a second controllable valve, a third controllable valve, a fourth controllable valve, a fifth controllable valve, a sixth controllable valve, a seventh controllable valve and a safety valve; One end of the first controllable valve is connected to a hydrogen generating end in a mobile hydrogen supply system through a pipeline, so as to receive hydrogen generated by the mobile hydrogen supply system, the other end of the first controllable valve is connected to a second controllable valve through a pipeline, and the other end of the second controllable valve is connected to a fuel cell end in the mobile hydrogen supply system through a pipeline; One end of the third controllable valve and the fourth controllable valve are both connected to the pipeline between the first controllable valve and the second controllable valve through a pipeline, the other end of the third controllable valve is connected to the hydrogen storage end of the mobile hydrogen supply system, and the other end of the fourth controllable valve is connected to the hydrogenator through a pipeline; One end of the fifth controllable valve is connected to the hydrogen storage end through a pipeline, and the other end of the fifth controllable valve is connected to the pipeline between the second controllable valve and the fuel cell end through a pipeline; One end of the safety valve is connected to the pipeline between the fourth controllable valve and the hydrogenator, and the other end of the safety valve is connected to the vent through a pipeline; One end of the sixth controllable valve is connected to nitrogen, and the other end of the sixth controllable valve is connected to the seventh controllable valve through a pipeline, and the other end of the seventh controllable valve is connected to the pipeline between the safety valve and the vent, and the pipeline between the sixth controllable valve and the seventh controllable valve is also connected to the pipeline between the first controllable valve and the second controllable valve, so as to form a nitrogen purge loop; The first controllable valve, the second controllable valve, the third controllable valve, the fourth controllable valve, the fifth controllable valve, the sixth controllable valve and the seventh controllable valve are electrically controlled valves or pneumatic valves; Wherein, the second controllable valve is a pressure reducing valve; The safety valve is a mechanical safety valve.

2. A control method for a mobile hydrogen supply system, based on the control unit for a mobile hydrogen supply system according to claim 1, characterized in that: The external hydrogen supply control process of the control unit includes the following steps: Step 1: After the mobile hydrogen supply system is started, an external hydrogen supply request is received and the first controllable valve is opened; Step 2: Determine whether the hydrogen generating end supplies hydrogen to the control unit, if so, proceed to the next step; if not, the hydrogen storage end supplies hydrogen to the control unit, and opens the fifth controllable valve to supply hydrogen for the operation of the fuel cell end; Step 3: The hydrogen generating end supplies hydrogen to the control unit, opens the second controllable valve, and supplies hydrogen to the fuel cell end; Step 4: Determine whether the hydrogen generating end is supplying hydrogen to the hydrogen refueling machine. If so, open the fourth controllable valve to supply hydrogen to the hydrogen refueling machine to refuel the external hydrogen-powered vehicle. If not, determine whether the hydrogen generation end is replenishing hydrogen for the hydrogen storage end. If so, open the third controllable valve to add hydrogen to its own hydrogen storage end; if not, shut down the system.

3. The control method for a mobile hydrogen supply system according to claim 2, characterized in that: When the mobile hydrogen supply system is shut down, the purge process of the control unit includes the following steps: Step a: opening the first controllable valve, the second controllable valve, the third controllable valve, the fourth controllable valve and the seventh controllable valve to discharge the hydrogen in the pipeline to the atmosphere, and reducing the pressure to atmospheric pressure; Step b: closing the seventh controllable valve and simultaneously opening the sixth controllable valve, so that the pipeline is filled with nitrogen through the sixth controllable valve; Step c: close the sixth controllable valve, keep other valves unchanged, open the seventh controllable valve, and exhaust the mixed gas; Step d: After repeating the operations of step a to step c 2 to 3 times, close the sixth controllable valve, the seventh controllable valve, the first controllable valve, the second controllable valve, the third controllable valve and the fourth controllable valve to complete the purging operation.

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