Hydrogenation system and method for supplying hydrogen to replaceable vehicle-mounted hydrogen storage module

Abstract

The invention discloses a hydrogenation system for supplying hydrogen to a replaceable vehicle-mounted hydrogen storage module. The hydrogenation system comprises a PLC (Programmable Logic Controller) control module, an emergency cut-off module, a hydrogen leakage and flame detection module, a process equipment module and the vehicle-mounted hydrogen storage module, the PLC control module is used for collecting key signals of the hydrogen leakage and flame detection module and the process equipment module, and the interlocking emergency cut-off module controls the operation of the process equipment module; the process equipment module comprises a hydrogen unloading module, a hydrogen compression module, a nitrogen busbar, a long tube trailer, a water chilling unit and a filling busbar; the hydrogen unloading module is connected with the long tube trailer through a plurality of unloading columns and used for unloading hydrogen loaded by the long tube trailer, a hydrogen outlet of the hydrogen unloading module is connected with the hydrogen compression module, the hydrogen is input into the filling busbar through the hydrogen compression module, and the water chilling unit is communicated with the hydrogen compression module and used for cooling the hydrogen compression module. The filling busbar comprises a plurality of branch pipelines used for filling the vehicle-mounted hydrogen storage modules with hydrogen, and the vehicle-mounted hydrogen storage modules filled with hydrogen are used for subsequently replacing the vehicle-mounted hydrogen storage modules on the hydrogen fuel cell vehicle in the'hydrogen bottle replacing mode '.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen energy infrastructure, and in particular to a hydrogen refueling station system for supplying hydrogen to an onboard hydrogen storage module of a "hydrogen bottle exchange mode" hydrogen fuel cell vehicle. Background Art

[0002] A hydrogen refueling station is a gas station that is specially used to provide hydrogen for fuel cell vehicles. As an important link in the hydrogen energy industry chain, the construction of hydrogen refueling stations is of great significance to promoting the popularization and development of hydrogen energy vehicles.

[0003] In terms of hydrogen filling technology, high-pressure gas hydrogen filling technology is the main one, and liquid hydrogen filling technology is still in its infancy. High-pressure gas hydrogen filling is affected by the limited investment in hydrogenation equipment hardware and supporting equipment. It is difficult to quickly increase the high-pressure gas hydrogen filling speed and put it into practical use in a short period of time. This results in the actual operation of some hydrogenation stations. Some fuel cell models have a large hydrogen storage capacity and a limited hydrogen filling speed, resulting in a long hydrogen filling time and a long queue time for subsequent vehicles. In addition, in some severe weather and specific environments, the working conditions and number of operators are limited. The "hydrogen bottle replacement filling mode" of hydrogen fuel cell vehicles came into being, that is, hydrogen fuel cell vehicles directly replace the on-board hydrogen supply module to achieve rapid energy replenishment, thereby greatly improving hydrogenation efficiency and convenience. Based on the advantages of the above-mentioned "hydrogen bottle replacement filling mode", the present invention proposes a hydrogenation station system that is beneficial to the promotion and application of this mode to solve the current problems of slow hydrogenation speed, long waiting time for hydrogenation, and poor artificial hydrogenation environment. At the same time, the hydrogenation station system is optimized to save fixed investment in hydrogenation stations.

[0004] Therefore, it is necessary to improve the above-mentioned prior art to overcome the above-mentioned defects. Summary of the invention

[0005] The purpose of the present invention is to provide a hydrogen refueling station equipment system and a working method thereof for supplying hydrogen to the on-board hydrogen storage module of a hydrogen fuel cell vehicle in a "hydrogen bottle exchange mode" to solve the problems of slow hydrogen refueling speed and long waiting time for hydrogen refueling encountered in the current hydrogen refueling station mode, and at the same time optimize the equipment configuration to save fixed investment in hydrogen refueling stations.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A hydrogen filling station equipment system for supplying hydrogen to an onboard hydrogen storage module of a "hydrogen bottle exchange mode" hydrogen fuel cell vehicle, comprising a PLC control module, an emergency cut-off module connected to the PLC control module for communication, a hydrogen leak and flame detection module, a process equipment module and an onboard hydrogen storage module;

[0008] The PLC control module is used to collect key signals from the hydrogen leakage and flame detection module and the process equipment module, and the interlock emergency cut-off module controls the operation of the process equipment module;

[0009] The process equipment module includes a hydrogen unloading module, a hydrogen compression module, a nitrogen bus, a long tube trailer, a chiller and a filling bus;

[0010] The hydrogen unloading module is connected to the long tube trailer through a number of unloading columns, and is used to unload the hydrogen loaded on the long tube trailer. The hydrogen outlet of the hydrogen unloading module is connected to the hydrogen compression module, and the hydrogen is input into the filling bus through the hydrogen compression module. The chiller is connected to the hydrogen compression module and is used to cool the hydrogen compression module. The filling bus includes a number of branch pipelines for filling the on-board hydrogen storage module with hydrogen. The filled on-board hydrogen storage module is used to replace the on-board hydrogen storage module on the fuel cell vehicle.

[0011] Furthermore, the emergency shut-off module includes an emergency stop button and an emergency shut-off valve. The emergency stop button is connected to the signal input end of the PLC control module and is used to send an emergency stop signal to the PLC control module. Several emergency shut-off valves are installed in the pipeline of the process equipment module and are used to prevent the hydrogen pressure in the process equipment module from being too high.

[0012] Furthermore, the hydrogen leakage and flame detection module includes a combustible gas alarm host, a hydrogen leakage probe, a flame alarm host and a flame probe; the hydrogen leakage probe and the flame probe are used to monitor hydrogen leakage and flame respectively, and send signals to the PLC control module through the combustible gas alarm host and the flame alarm host.

[0013] Furthermore, the filling bus includes a plurality of branch pipelines, the front ends of the branch pipelines are respectively connected to the hydrogen compression module and the nitrogen bus through inlet pipelines, and the rear ends of the branch pipelines are provided with hydrogen filling guns for connecting to the vehicle-mounted hydrogen storage module.

[0014] Furthermore, a filter and a flow meter are provided on the inlet pipeline;

[0015] The inlet end of the inlet pipeline is connected to the hydrogen compression module and the nitrogen busbar through a first pipeline and a second pipeline respectively, a first needle valve is provided on the first pipeline, and a second needle valve and a check valve are provided on the second pipeline;

[0016] The outlet ends of the inlet pipelines are respectively communicated with a branch pipeline.

[0017] Furthermore, a third needle valve is provided at the inlet of the branch pipeline, a hydrogenation gun is provided at the outlet of the branch pipeline, an emergency shut-off valve, a pressure gauge and a pressure sensor are provided on the branch pipeline, the branch pipeline is connected to the discharge pipeline through the emergency shut-off valve, and a ball valve is provided on the discharge pipeline;

[0018] The branch pipeline is also connected to the safety pipeline. A check valve and a fourth needle valve are provided at the inlet end of the safety pipeline, and a safety valve and a fifth needle valve are provided at the outlet end of the safety pipeline.

[0019] A method for operating a hydrogen refueling station for supplying hydrogen to an onboard hydrogen storage module of a hydrogen fuel cell vehicle in a "hydrogen bottle exchange mode" comprises the following steps:

[0020] 1) Connect the front hydrogen unloading module to the long tube trailer through the unloading column, and connect the rear filling bus to the on-board hydrogen storage module;

[0021] 2) Open the second needle valve and emergency shut-off valve on the second pipeline, introduce nitrogen through the nitrogen bus for nitrogen replacement, wait until the pressure on the pressure gauge reaches the replacement pressure and maintains the pressure for tens of seconds, then open the valve on the safety pipeline to release the pressure to the filling pressure;

[0022] 3) Close the above valves, open the first needle valve on the first pipeline and start filling hydrogen. In the early stage of filling hydrogen, the process equipment module adopts the straight-through mode. In the straight-through mode, the pressure in the long-tube trailer is greater than the pressure in the on-board hydrogen storage module. Therefore, there is no need to start the hydrogen compression module. The hydrogen stored in the long-tube trailer will enter the on-board hydrogen storage module through the filling bus under the action of the pressure difference;

[0023] 4) When the pressure in the on-board hydrogen storage module gradually increases and approaches the pressure in the long tube trailer, the process equipment module adopts the boosting mode. In the boosting mode, the hydrogen compression module is started to boost the hydrogen at the front end so that the hydrogen at the front end is greater than the pressure of the on-board hydrogen storage module. The hydrogen is filled into the busbar and enters the on-board hydrogen storage module under the action of the pressure difference;

[0024] 5) After the on-board hydrogen storage module is filled, the on-board hydrogen storage module is transferred to the corresponding location for subsequent use.

[0025] In summary, the present invention has the following beneficial effects:

[0026] The hydrogen refueling station system and working method for supplying hydrogen to the on-board hydrogen storage module of a hydrogen fuel cell vehicle in a "hydrogen bottle exchange mode" described in the present invention is adopted in combination with the "hydrogen bottle exchange and filling mode" of the hydrogen fuel cell vehicle to solve the current problems of slow hydrogen refueling speed and long waiting time for hydrogen refueling. At the same time, the hydrogen refueling mode is optimized, and the coordinated operation of each equipment module is optimized to save the fixed investment of the hydrogen refueling station. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a module block diagram of the hydrogen filling station system adopting the bottle exchange mode described in the present invention.

[0028] Figure 2 It is a schematic diagram of the charging bus described in the present invention. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with illustrations and specific embodiments.

[0030] like Figure 1 and Figure 2 As shown, a hydrogen refueling station system adopting a bottle exchange mode proposed by the present invention includes a PLC control module 2, an emergency cut-off module 1 communicatively connected to the PLC control module 2, a hydrogen leakage and flame detection module 3, a process equipment module 5 and an on-board hydrogen storage module 6;

[0031] The PLC control module 2 is used to collect key signals from the hydrogen leakage and flame detection module 3 and the process equipment module 5, and the interlocking emergency cut-off module 1 controls the operation of the process equipment module 5;

[0032] The process equipment module 5 includes a hydrogen unloading module 51, a hydrogen compression module 52, a nitrogen bus 53, a long tube trailer 54, a chiller 55 and a filling bus 56;

[0033] The hydrogen unloading module 51 is connected to the long tube trailer 54 through a plurality of unloading columns, and is used to unload the hydrogen loaded on the long tube trailer 54. The hydrogen outlet of the hydrogen unloading module 51 is connected to the hydrogen compression module 52, and the hydrogen is input into the filling bus 56 through the hydrogen compression module 52. The chiller 55 is connected to the hydrogen compression module 52 and is used to cool the hydrogen compression module 52. The filling bus 56 includes a plurality of branch pipelines 561 for filling the on-board hydrogen storage module 6 with hydrogen. The filled on-board hydrogen storage module 6 is used to replace the on-board hydrogen storage module 6 on the fuel cell vehicle.

[0034] The emergency shut-off module 1 includes an emergency stop button 11 and an emergency shut-off valve 12. The emergency stop button 11 is connected to the signal input end of the PLC control module 2 and is used to send an emergency stop signal to the PLC control module 2. Several emergency shut-off valves 12 are installed in the pipeline of the process equipment module 5 and are used to prevent the hydrogen pressure in the process equipment module 5 from being too high.

[0035] The hydrogen leakage and flame detection module 3 includes a combustible gas alarm host 31, a hydrogen leakage probe 32, a flame alarm host 33 and a flame probe 34; the hydrogen leakage probe 32 and the flame probe 34 are used to monitor hydrogen leakage and flame respectively, and send signals to the PLC control module 2 through the combustible gas alarm host 31 and the flame alarm host 33.

[0036] The filling bus 56 includes a plurality of branch pipelines 561 , the front ends of the branch pipelines 561 are respectively connected to the hydrogen compression module 52 and the nitrogen bus 53 through inlet pipelines 562 , and the rear ends of the branch pipelines 561 are provided with a hydrogenation gun 563 for connecting to the vehicle-mounted hydrogen storage module 6 .

[0037] The inlet pipe 562 is provided with a filter 5621 and a flow meter 5622;

[0038] The inlet end of the inlet pipeline 562 is connected to the hydrogen compression module 52 and the nitrogen bus 53 through a first pipeline and a second pipeline respectively. A first needle valve 5623 is provided on the first pipeline, and a second needle valve 5624 and a check valve 5625 are provided on the second pipeline.

[0039] The outlet ends of the inlet pipelines 562 are respectively connected to a branch pipeline 561;

[0040] A third needle valve 5611 is provided at the inlet of the branch pipeline 561, a hydrogenation gun 563 is provided at the outlet of the branch pipeline 561, an emergency shut-off valve 12, a pressure gauge 5612 and a pressure sensor 5613 are provided on the branch pipeline 561, the branch pipeline 561 is connected to the discharge pipeline through the emergency shut-off valve 12, and a ball valve 5614 is provided on the discharge pipeline;

[0041] The branch pipeline 561 is also connected to a safety pipeline. A check valve 564 and a fourth needle valve 565 are provided at the inlet end of the safety pipeline, and a safety valve 566 and a fifth needle valve 567 are provided at the outlet end of the safety pipeline.

[0042] A working method of a hydrogen refueling station system using a bottle exchange mode comprises the following steps:

[0043] 1) Connect the front hydrogen unloading module 51 to the long tube trailer 54 through the unloading column, and connect the rear filling bus 56 to the vehicle-mounted hydrogen storage module 6;

[0044] 2) Open the second needle valve 5624 and the emergency shut-off valve 12 on the second pipeline, introduce nitrogen through the nitrogen bus 53 for nitrogen replacement, wait until the pressure on the pressure gauge 5611 reaches the replacement pressure and maintains the pressure for tens of seconds, then open the valve on the safety pipeline to release the pressure to the filling pressure;

[0045] 3) Close the above valves, open the first needle valve 5623 on the first pipeline and start filling hydrogen. In the early stage of filling hydrogen, the process equipment module 5 adopts the straight-through mode. In the straight-through mode, the pressure in the long-tube trailer 54 is greater than the pressure in the vehicle-mounted hydrogen storage module 6. Therefore, there is no need to start the hydrogen compression module 52. The hydrogen stored in the long-tube trailer 54 will enter the vehicle-mounted hydrogen storage module 6 through the filling bus 56 under the action of the pressure difference;

[0046] 4) When the pressure in the on-board hydrogen storage module 6 gradually increases and approaches the pressure in the long tube trailer 54, the process equipment module 5 adopts the boosting mode. In the boosting mode, the hydrogen compression module 52 is started to boost the hydrogen at the front end so that the hydrogen at the front end is greater than the pressure of the on-board hydrogen storage module 6. The hydrogen fills the bus 56 under the action of the pressure difference and enters the on-board hydrogen storage module 6;

[0047] 5) After the on-board hydrogen storage module 6 is filled, the on-board hydrogen storage module 6 is moved to a storage location for standby; when a heavy truck needs to be refueled with hydrogen, the on-board hydrogen storage module 6 of the heavy truck is directly replaced with the on-board hydrogen storage module 6 that has been filled in the station.

[0048] In this document, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore should not be understood as limitations of the present invention.

[0049] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hydrogenation system for supplying hydrogen to a replaceable vehicle-mounted hydrogen storage module, characterized in that: It comprises a PLC control module (2), an emergency cut-off module (1) communicatively connected to the PLC control module (2), a hydrogen leakage and flame detection module (3), a process equipment module (5) and an on-vehicle hydrogen storage module (6); The PLC control module (2) is used to collect key signals from the hydrogen leakage and flame detection module (3) and the process equipment module (5), and interlock the emergency cut-off module (1) to control the operation of the process equipment module (5); The process equipment module (5) comprises a hydrogen unloading module (51), a hydrogen compression module (52), a nitrogen bus (53), a long tube trailer (54), a chiller (55) and a filling bus (56); The hydrogen unloading module (51) is connected to the long tube trailer (54) through a plurality of unloading columns and is used to unload the hydrogen loaded on the long tube trailer (54). The hydrogen outlet of the hydrogen unloading module (51) is connected to the hydrogen compression module (52). The hydrogen is input into the filling bus (56) through the hydrogen compression module (52). The chiller (55) is connected to the hydrogen compression module (52) and is used to cool the hydrogen compression module (52). The filling bus (56) includes a plurality of branch pipelines (561) for filling the on-board hydrogen storage module (6) with hydrogen. The filled on-board hydrogen storage module (6) is used to replace the on-board hydrogen storage module (6) on the fuel cell vehicle.

2. The hydrogen refueling system for supplying hydrogen to a replaceable vehicle-mounted hydrogen storage module according to claim 1, characterized in that: The emergency shut-off module (1) comprises an emergency stop button (11) and an emergency shut-off valve (12); the emergency stop button (11) is connected to a signal input end of a PLC control module (2) and is used to send an emergency stop signal to the PLC control module (2); and a plurality of emergency shut-off valves (12) are installed in the pipeline of the process equipment module (5) and are used to prevent the hydrogen pressure in the process equipment module (5) from being too high.

3. The hydrogen refueling system for supplying hydrogen to a replaceable vehicle-mounted hydrogen storage module according to claim 1, characterized in that: The hydrogen leakage and flame detection module (3) comprises a combustible gas alarm host (31), a hydrogen leakage probe (32), a flame alarm host (33) and a flame probe (34); the hydrogen leakage probe (32) and the flame probe (34) are used to monitor hydrogen leakage and flame respectively, and send signals to the PLC control module (2) through the combustible gas alarm host (31) and the flame alarm host (33).

4. The hydrogen refueling system for supplying hydrogen to a replaceable vehicle-mounted hydrogen storage module according to claim 1, characterized in that: The filling busbar (56) comprises a plurality of branch pipelines (561), the front ends of the branch pipelines (561) being respectively connected to the hydrogen compression module (52) and the nitrogen busbar (53) via inlet pipelines (562), and the rear ends of the branch pipelines (561) being provided with a hydrogenation gun (563) for connecting to the vehicle-mounted hydrogen storage module (6).

5. The hydrogen refueling system for supplying hydrogen to a replaceable vehicle-mounted hydrogen storage module according to claim 4, characterized in that: The inlet pipeline (562) is provided with a filter (5621) and a flow meter (5622); The inlet end of the inlet pipeline (562) is connected to the hydrogen compression module (52) and the nitrogen bus (53) through a first pipeline and a second pipeline respectively, a first needle valve (5623) is provided on the first pipeline, and a second needle valve (5624) and a check valve (5625) are provided on the second pipeline; The outlet ends of the inlet pipelines (562) are respectively connected to a branch pipeline (561).

6. The hydrogen refueling system for supplying hydrogen to a replaceable vehicle-mounted hydrogen storage module according to claim 5, characterized in that: A third needle valve (5611) is provided at the inlet of the branch pipeline (561), a hydrogenation gun (563) is provided at the outlet of the branch pipeline (561), an emergency shut-off valve (12), a pressure gauge (5612) and a pressure sensor (5613) are provided on the branch pipeline (561), the branch pipeline (561) is connected to the discharge pipeline via the emergency shut-off valve (12), and a ball valve (5614) is provided on the discharge pipeline; The branch pipeline (561) is also connected to a safety pipeline. A check valve (564) and a fourth needle valve (565) are provided at the inlet end of the safety pipeline, and a safety valve (566) and a fifth needle valve (567) are provided at the outlet end of the safety pipeline.

7. A hydrogen refueling system and method for supplying hydrogen to a replaceable vehicle-mounted hydrogen storage module, comprising a hydrogen refueling station system as claimed in claim 6, characterized in that: The steps include: 1) connecting the front hydrogen unloading module (51) to the long tube trailer (54) via the unloading column, and connecting the rear charging bus (56) to the vehicle-mounted hydrogen storage module (6); 2) Open the second needle valve (5624) and the emergency shut-off valve (12) on the second pipeline, introduce nitrogen through the nitrogen bus (53) for nitrogen replacement, wait until the pressure on the pressure gauge (5611) reaches the replacement pressure and maintains the pressure for tens of seconds, then open the valve on the safety pipeline to release the pressure to the filling pressure; 3) The valve is closed, and the first needle valve (5623) on the first pipeline is opened to start filling hydrogen. In the early stage of filling hydrogen, the process equipment module (5) adopts a straight-through mode. In the straight-through mode, the pressure in the long-tube trailer (54) is greater than the pressure in the vehicle-mounted hydrogen storage module (6). Therefore, there is no need to start the hydrogen compression module (52). The hydrogen stored in the long-tube trailer (54) will enter the vehicle-mounted hydrogen storage module (6) through the filling bus (56) under the action of the pressure difference; 4) When the pressure in the on-board hydrogen storage module (6) gradually increases and approaches the pressure in the long tube trailer (54), the process equipment module (5) adopts a boosting mode. In the boosting mode, the hydrogen compression module (52) is started to boost the pressure of the hydrogen at the front end so that the pressure of the hydrogen at the front end is greater than the pressure of the on-board hydrogen storage module (6). The hydrogen fills the busbar (56) under the action of the pressure difference and enters the on-board hydrogen storage module (6); 5) After the on-board hydrogen storage module (6) is filled, the on-board hydrogen storage module (6) is transported to a corresponding location for storage for subsequent use.

Images