Rail vehicle, fuel cell system of a rail vehicle and control method thereof

Abstract

The application discloses a rail vehicle, a fuel cell system of the rail vehicle and a control method of the fuel cell system, wherein the rail vehicle comprises multiple car bodies, the fuel cell system comprises a fuel cell, a hydrogen storage container, a hydrogen supply pipeline and a hydrogen filling pipeline, the fuel cell and the hydrogen storage container are arranged in different car bodies respectively, a hydrogen supply pipeline is arranged between the fuel cell and the hydrogen storage container, the hydrogen supply pipeline comprises a first hose section, the hydrogen supply pipeline is further provided with a valve box, the valve box is arranged at the upstream of the first hose section, and the valve box is provided with an electromagnetic valve, a safety valve, a pressure reducing valve, a manual relief valve, a high-low pressure sensor and the like. The first hose section can be deformed flexibly, can better adapt to the relative displacement between the fuel cell and the hydrogen storage container, and can greatly avoid hydrogen leakage in the hydrogen supply process and safety accidents caused by the hydrogen leakage.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail vehicles, in particular to a rail vehicle, a fuel cell system of the rail vehicle and a control method thereof. BACKGROUND

[0002] With the rapid development of hydrogen energy and fuel cell technology, rail vehicles driven by hydrogen fuel cells are gradually moving towards commercial use, and have become an important development direction of new energy rail vehicles.

[0003] A hydrogen fuel cell vehicle uses hydrogen as an energy source and a fuel cell as a power generation unit. Hydrogen is stored in a hydrogen storage container in the form of gas, liquid, metal hydride or hydrogen-containing organic compounds and is delivered to the fuel cell through a hydrogen supply pipeline. Generally, the hydrogen storage container and the fuel cell are close to each other and installed on the same platform (a roof platform, a bottom platform or the same frame), and there is no relative displacement. Therefore, the connection pipeline (i.e. the hydrogen supply pipeline) between the hydrogen storage container and the fuel cell is generally a hard pipe made of stainless steel.

[0004] However, in many application scenarios, due to the limitation of installation space, the hydrogen storage container and the fuel cell are arranged on different platforms. During vehicle operation, relative displacement may occur between different platforms. If a hard pipe is still used for connection, it is easy to cause bending, fatigue and even damage of the hard pipe, thereby causing hydrogen leakage and possibly causing safety accidents such as explosion. SUMMARY

[0005] The purpose of the present application is to provide a rail vehicle, a fuel cell system of the rail vehicle and a control method thereof, wherein the hydrogen supply pipeline of the fuel cell system is provided with a first flexible pipe section, which can improve the safety of operation.

[0006] To solve the above technical problems, the present application provides a fuel cell system of a rail vehicle, the rail vehicle comprising a plurality of car bodies, the fuel cell system comprising a fuel cell and a hydrogen storage container, the fuel cell and the hydrogen storage container being arranged in different car bodies, respectively, a hydrogen supply pipeline being arranged between the fuel cell and the hydrogen storage container, the hydrogen supply pipeline comprising a first flexible pipe section, the hydrogen supply pipeline further comprising a valve box, the valve box being arranged upstream of the first flexible pipe section, and a pressure reducing valve being arranged in the valve box.

[0007] The first flexible pipe section can deform flexibly and can better adapt to the relative displacement between the fuel cell and the hydrogen storage container, thereby avoiding hydrogen leakage during hydrogen supply and the safety accidents caused thereby to a great extent.

[0008] And, the upstream of the first hose section can be further provided with a valve box, and a pressure reducing valve is arranged in the valve box to reduce the pressure of the hydrogen discharged from the hydrogen supply container. In this way, on the one hand, the use requirement of the fuel cell can be better met, and on the other hand, the gas pressure in the first hose section can be reduced, so that the damage to the first hose section during the transmission of hydrogen can be avoided to a large extent, and the safety can be improved to a large extent.

[0009] Optionally, the number of the hydrogen storage containers is multiple, each of the hydrogen storage containers is arranged on a different vehicle body, and each of the hydrogen storage containers is connected to the fuel cell through the hydrogen supply pipeline.

[0010] Optionally, the hydrogen supply pipeline comprises a main pipeline and a plurality of branch pipelines, the fuel cell and each of the hydrogen storage containers are connected to the branch pipelines, each of the branch pipelines is connected to the main pipeline, and the branch pipeline connected to each of the hydrogen storage containers is provided with the valve box.

[0011] Optionally, the main pipeline comprises first hard pipe sections and the first hose sections arranged alternately, the branch pipeline comprises second hard pipe sections, the second hard pipe sections are connected to the first hard pipe sections, and the part of the main pipeline between adjacent two branch pipelines comprises the first hose sections.

[0012] Optionally, a first switch valve is arranged at the upstream and / or downstream of the first hose section; and / or, a first safety valve is arranged at the upstream and / or downstream of the first hose section; and / or, a first one-way valve is arranged at the downstream of at least part of the first hose section.

[0013] Optionally, a hydrogen filling pipeline is further arranged, the hydrogen filling pipeline has a hydrogen filling port, the hydrogen filling pipeline is connected to each of the hydrogen storage containers in sequence, and the part of the hydrogen filling pipeline between adjacent two hydrogen storage containers comprises a second hose section.

[0014] Optionally, a second switch valve is arranged at the upstream and / or downstream of the second hose section; and / or, a second safety valve is arranged at the upstream and / or downstream of the second hose section; and / or, a second one-way valve is arranged at the downstream of the hydrogen filling port and the downstream of the second hose section.

[0015] Optionally, the hydrogen filling pipeline and the hydrogen supply pipeline are connected, and the connection position of the hydrogen filling pipeline and the hydrogen supply pipeline is located at the upstream of the valve box.

[0016] Optionally, the first hose section and the second hose section are both wound with signal cables, when the first hose section / second hose section is broken due to stretching, the signal transmission is interrupted, the system issues an alarm and automatically closes the corresponding switch valve, so as to realize the fault isolation of the corresponding disconnected first hose section or second hose section.

[0017] Optionally, a controller is further included.

[0018] The application further provides a control method of the fuel cell system of the rail vehicle, which is suitable for the fuel cell system of the rail vehicle, and comprises the following steps: detecting the operation condition of the fuel cell system; determining whether the operation condition is a fault operation, and if yes, performing the following steps: locating the position where the fault occurs; and isolating the position.

[0019] The control method can isolate only the position where the fault occurs, and other positions can still work normally, so that the rail vehicle can be prevented from stopping running due to the local fault, and the fault operation capability of the rail vehicle can be effectively improved.

[0020] Optionally, the fuel cell system further comprises a hydrogen filling pipeline, the number of the hydrogen storage containers is plural, each of the hydrogen storage containers is arranged on different car bodies, the hydrogen filling pipeline is connected with each of the hydrogen storage containers in sequence, the part of the hydrogen filling pipeline between two adjacent hydrogen storage containers comprises a second hose section, and the position where the fault occurs comprises the hydrogen storage container, the first hose section and the second hose section.

[0021] Optionally, the hydrogen storage container comprises a plurality of gas cylinders, and the position where the fault occurs further comprises a gas cylinder.

[0022] The application further provides a control method of the fuel cell system of the rail vehicle, which is suitable for the fuel cell system of the rail vehicle, and specifically comprises the following steps: after hydrogen filling is completed, closing the gas outlet of each hydrogen storage container, and controlling the hydrogen filling pipeline to be connected with the fuel cell through the hydrogen supply pipeline for a set time length.

[0023] The control method provided by the application can transport the residual high-pressure hydrogen in the hydrogen filling pipeline to the fuel cell, so that the waste of hydrogen can be avoided, and the potential safety risk of the residual high-pressure hydrogen in the hydrogen filling pipeline can also be overcome.

[0024] The application further provides a rail vehicle comprising a plurality of car bodies and the fuel cell system of the rail vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of the fuel cell system of the rail vehicle provided by the application;

[0026] Figure 2 FIG. 2 is a flowchart of a control method of the fuel cell system of the rail vehicle provided by the application.

[0027] Figure 1 The reference signs in the drawings are described as follows:

[0028] 1 vehicle body;

[0029] 2 fuel cell system, 21 fuel cell, 22 hydrogen storage container, 23 hydrogen supply pipeline, 231 main pipeline, 231a first hard pipe section, 231b first hose section, 231c first switch valve, 231d first safety valve, 231e first check valve, 232 branch pipeline, 232a valve box, 24 hydrogen addition pipeline, 241 third hard pipe section, 242 second hose section, 243 second switch valve, 244 second safety valve, 245 hydrogen addition port, 246 second check valve, 25 controller. DETAILED DESCRIPTION

[0030] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0031] In the embodiments of the present application, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features.

[0032] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, "connection" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium. Among them, "fixed connection" means that the relative positional relationship after connection is unchanged. "Rotary connection" means that the relative rotation after connection is connected. "Sliding connection" means that the relative sliding after connection is connected.

[0033] The orientation terms mentioned in the embodiments of the present application, such as "up", "down" and the like, are only the direction of the drawings, therefore, the orientation terms used are for better, clearer illustration and understanding of the embodiments of the present application, and are not indicative or implied that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, therefore, cannot be understood as a limitation on the embodiments of the present application. In addition, unless otherwise specified in the present application, "a plurality of" in the present application means two or more.

[0034] In the description of the embodiments of the present application, the term "comprising" or "including" or any other variant thereof is intended to mean non-exclusive inclusion, such that processes, methods, articles or apparatuses that comprise a list of elements are not limited to those elements, but can also include other elements not expressly listed, or also include elements inherent in such processes, methods, articles or apparatuses. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

[0035] In the embodiments of the present application, "and / or" is merely a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0036] Embodiment One

[0037] Please refer to Figure 1 , Figure 1 for a structural schematic diagram of a specific embodiment of the fuel cell system of the rail vehicle provided by the present application.

[0038] The rail vehicle related to the embodiments of the present application comprises a plurality of car bodies 1, and adjacent car bodies 1 can be connected to form a whole. Here, the embodiments of the present application do not limit the number of car bodies 1 and the connection mode between adjacent two car bodies 1, and in specific practice, a person skilled in the art can determine according to the type of rail vehicle and other actual conditions. In some embodiments, adjacent two car bodies 1 can be connected through a car coupler.

[0039] As shown in Figure 1 , the present application provides a fuel cell system 2 comprising a fuel cell 21 and a hydrogen storage container 22, and a hydrogen supply pipeline 23 is arranged between the fuel cell 21 and the hydrogen storage container 22. The hydrogen stored in the hydrogen storage container 22 can be delivered to the fuel cell 21 through the hydrogen supply pipeline 23 to supply the fuel cell 21 for power generation, so as to meet the energy demand of the rail vehicle.

[0040] The fuel cell 21 and the hydrogen storage container 22 can be arranged on different car bodies 1 respectively, and can be arranged on the top or bottom of the car body 1, or one can be arranged on the top of the car body 1 and the other can be arranged on the bottom of the car body 1. In this way, during the operation of the rail vehicle, the relative distance between the fuel cell 21 and the hydrogen storage container 22 changes with the relative position of the two car bodies 1, which can cause a pulling force on the hydrogen supply pipeline 23. If the hydrogen supply pipeline 23 still uses the hard pipe mentioned in the background art, the hydrogen supply pipeline 23 can be easily bent, fatigued or even damaged under the action of the pulling force, which can cause hydrogen leakage and even safety accidents such as explosion.

[0041] To solve the above problems, in the embodiment of the present application, the hydrogen supply pipeline 23 can include a first soft pipe section 231b, which can be deformed flexibly and can better adapt to the relative displacement between the fuel cell 21 and the hydrogen storage container 22, thereby greatly reducing the risk of hydrogen leakage and safety accidents caused thereby during the hydrogen supply process.

[0042] In addition, a valve box 232a can be arranged upstream of the first soft pipe section 231b, and a pressure reducing valve can be arranged in the valve box 232a to reduce the pressure of the hydrogen discharged from the hydrogen supply container 22. In this way, on the one hand, the use requirements of the fuel cell 21 can be better met, and on the other hand, the gas pressure in the first soft pipe section 231b can be reduced, which can greatly reduce the damage to the first soft pipe section 231b during the hydrogen transmission process and can greatly improve the safety. The specific pressure value of the hydrogen after pressure reduction is not limited herein, and can be adjusted by those skilled in the art according to actual needs during implementation; as an exemplary description, the pressure of the hydrogen after pressure reduction can be 1±0.2MPa.

[0043] In actual use, the valve box 232a can not only have the function of reducing pressure, but also can have the functions of remote shutdown, manual discharge, overpressure discharge, pressure monitoring, etc. Correspondingly, the valve box 232a can be provided with on-off valves, manual discharge valves, overpressure discharge valves (also known as safety valves in some embodiments), pressure sensors (such as high and low pressure sensors, etc.), etc. The internal devices of the valve box 232a can be set according to actual use requirements.

[0044] Herein, the material of the first soft pipe section 231b is not limited in the embodiment of the present application, and can be determined by those skilled in the art according to actual use requirements, as long as it can be deformed flexibly. For example, the material of the first soft pipe section 231b can be plastic, silicone, etc., and a metal material compatible with hydrogen transmission can also be used.

[0045] The number of hydrogen storage containers 22 used in combination with the same fuel cell 21 can be one or multiple. When the number of hydrogen storage containers 22 is multiple, each hydrogen storage container 22 can be installed on the same vehicle body 1, in which case, the hydrogen storage containers 22 can be connected by hard pipes or soft pipes, and then connected to the fuel cell 21 through the first soft pipe section 231b; or at least some of the hydrogen storage containers 22 can be distributed on different vehicle bodies 1, in which case, the hydrogen storage containers 22 distributed on different vehicle bodies 1 can each be provided with the first soft pipe section 231b, so as to be directly or indirectly connected to the fuel cell 21 through the first soft pipe section 231b.

[0046] In Figure 1 the embodiment, the number of hydrogen storage containers 22 used in combination with the same fuel cell 21 is multiple, and each hydrogen storage container 22 can be arranged on a different vehicle body 1. In this embodiment, the hydrogen supply pipeline 23 can include a main pipeline 231 and a plurality of branch pipelines 232, the fuel cell 21 and each hydrogen storage container 22 can be connected to a branch pipeline 232, and each branch pipeline 232 can be connected to the main pipeline 231, in which case, the fuel cell 21 and each hydrogen storage container 22 are connected in parallel to the main pipeline 231 through the branch pipeline 232, and the structure of the entire hydrogen supply pipeline 23 is relatively simple, which can facilitate installation and arrangement; the branch pipeline 232 connected to the hydrogen storage container 22 can be provided with a valve box 232a, through which the pressure, flow rate and other parameters of the hydrogen in the branch pipeline 232 can be adjusted to meet the use requirements of the fuel cell 21.

[0047] The main pipeline 231 can include first hard pipe sections 231a and first soft pipe sections 231b arranged alternately, and the branch pipeline 232 can include second hard pipe sections, which can be connected to the first hard pipe sections 231a. The portion of the main pipeline 231 between adjacent branch pipelines 232 can include a first soft pipe section 231b, so as to adapt to the relative displacement between adjacent hydrogen storage containers 22 and between the hydrogen storage containers 22 and the fuel cell 21.

[0048] In combination Figure 1 , in specific installation, each hydrogen storage container 22 can be pre-installed with a connected second hard pipe section and first hard pipe section 231a, and then, adjacent two first hard pipe sections 231a can be connected through a first soft pipe section 231b to form the main pipeline 231.

[0049] Here, the embodiments of the present application do not limit the material of the first hard pipe section 231 and the second hard pipe section, and in actual use, a person skilled in the art can determine according to specific use requirements, as long as the requirements of use are met. For example, the material of the first hard pipe section 231a and the second hard pipe section can be a metal that can be compatible with hydrogen delivery, such as 316L stainless steel, etc.

[0050] In some optional embodiments, the upstream and / or downstream of the first hose section 231b can be configured with a first switch valve 231c. By adjusting the first switch valve 231c, the first hose section 231b can be turned on or turned off.

[0051] In normal operation, the first switch valve 231c can be in an open valve state, so that the first hose section 231b can be turned on, and the smoothness of hydrogen flow can be ensured. When a fault such as a breakage of the first hose section 231b is detected, the first switch valve 231c upstream and / or downstream of the first hose section 231b can be in a closed valve state to isolate the corresponding first hose section 231b. It can be understood that the above isolation of the first hose section 231b is point isolation, which can isolate the specified first hose section 231b, while the remaining first hose section 231b can still work normally, which can avoid the overall shutdown of the rail vehicle due to the fault of one or several first hose sections 231b, and can effectively improve the ability of system fault operation.

[0052] In some optional embodiments, the upstream and / or downstream of the first hose section 231b can be configured with a first safety valve 231d. When the pressure in the first hose section 231b is detected to exceed the set pressure, the first safety valve 231d can be opened to release the pressure in the first hose section 231b, so as to ensure the safety of system operation.

[0053] In some optional embodiments, the downstream of at least part of the first hose section 231b can be configured with a first one-way valve 231e, which can realize one-way conduction and can ensure the flow direction of hydrogen in the hydrogen supply pipeline 23.

[0054] When a fault such as a breakage of the corresponding first hose section 231b occurs, the first one-way valve 231e downstream of the first hose section 231b can also isolate the first hose section 231b and the downstream equipment (mainly part of the downstream hydrogen supply pipeline 23 and the hydrogen storage container 22, etc.), which can point to isolate the fault first hose section 231b, while the downstream equipment can still work normally, which can avoid the overall shutdown of the rail vehicle due to the fault of one or several first hose sections 231b, and can effectively improve the ability of system fault operation.

[0055] In Figure 1In some embodiments, a first one-way valve 231c can be arranged at the downstream of each first hose section 231b except for the first hose section 231b adjacent to the fuel cell 21.

[0056] Please continue to refer to Figure 1 The fuel cell system 2 can further comprise a hydrogen filling pipeline 24, which is provided with a hydrogen filling port 245 for being connected to a hydrogen filling pipeline of a hydrogen filling station. The hydrogen filling pipeline 24 can be connected to each hydrogen storage container 22 in sequence, and the part of the hydrogen filling pipeline 24 between two adjacent hydrogen storage containers 22 can comprise a second hose section 242 to accommodate the relative displacement between the two adjacent hydrogen storage containers 22, thereby avoiding hydrogen leakage during hydrogen filling and the resulting safety accidents to a great extent.

[0057] The material of the second hose section 242 can refer to the first hose section 231b described above, and will not be repeated here.

[0058] Similar to the first hose section 231b, the upstream and / or downstream of the second hose section 242 can be provided with a second switch valve 243, which can realize the conduction and fault isolation of the second hose section 242, and the fault isolation mentioned here is also point isolation, which can improve the fault operation capability of the system. The upstream and / or downstream of the second hose section 242 can be provided with a second safety valve 244, which can relieve the pressure of the second hose section 242 to ensure the safety of the system operation. The downstream of each second hose section 242 and the downstream of the hydrogen filling port 245 are provided with a second one-way valve 246 to realize the one-way conduction of hydrogen, and also realize fault isolation, which can improve the fault operation capability of the system.

[0059] In some embodiments, the hydrogen filling pipeline 24 and the hydrogen supply pipeline 23 can be independent of each other to avoid mutual interference.

[0060] In some other embodiments, as shown in Figure 1 The hydrogen filling pipeline 24 and the hydrogen supply pipeline 23 can also be connected, so that the hydrogen filling pipeline 24 and the hydrogen supply pipeline 23 can form an integral whole, which can facilitate installation.

[0061] After the hydrogen filling is completed, a certain amount of high-pressure hydrogen gas is actually still left in the hydrogen filling pipeline 24. At this time, the hydrogen filling pipeline 24 can be controlled to be connected to the fuel cell 21 through the hydrogen supply pipeline 23. In this way, the high-pressure hydrogen gas in the hydrogen filling pipeline 24 can be delivered to the fuel cell 21, which can avoid the waste of hydrogen, and also can overcome the potential safety risk of the residual high-pressure hydrogen gas in the hydrogen filling pipeline 24.

[0062] And, the hydrogen supply pipeline 24 and the hydrogen supply pipeline 23 are connected at the upstream of the valve box 232a, so that the hydrogen supplied by the hydrogen supply pipeline 24 can be controlled by the pressure of the pressure reducing valve, so as to meet the use requirements of the fuel cell 21, and the possibility of damage to the first hose section 231b can be reduced.

[0063] Still as Figure 1 shown, the hydrogen supply pipeline 24 can further include a third rigid pipe section 241, and the hydrogen supply pipeline 24 can be connected to the branch pipeline 232 through the third rigid pipe section 241, so as to connect the hydrogen supply pipeline 24 and the hydrogen supply pipeline 23 as a whole, thereby simplifying the structure of the hydrogen supply pipeline 24 and the hydrogen supply pipeline 23, and facilitating installation.

[0064] The first hose section 231b and the second hose section 242 can be wound with signal cables. Under normal operation, the signals transmitted by the signal cables always exist, which indicates that the first hose section 231b and the second hose section 242 are in normal operation. When a fault condition such as breakage or loose shedding of the first hose section 231b and the second hose section 242 occurs, the signal cables can be pulled off, and the signals transmitted by the signal cables will be interrupted. In specific practice, the operation condition of the system can be detected by judging whether the signals transmitted by the signal cables exist, and the position of the hose fault can be quickly located, so as to timely isolate and repair the fault.

[0065] Please continue to refer to Figure 1 , the embodiment of the present application can further include a controller 25, and the controller 25 and the valve box 232a, the first switch valve 231c, the first safety valve 231d, the second switch valve 243, and the second safety valve 244 can be signal connected, so as to control the opening and closing of the valve components, thereby realizing automatic operation or fault isolation of the system. For example, when a fault exists in a certain hydrogen storage container 22, the corresponding valve box 232a can be controlled to be closed, so as to isolate the corresponding hydrogen storage container 22; when a fault occurs in a certain hose section, the switch valves upstream and / or downstream of the hose section can be controlled to be closed, so as to isolate the corresponding hose section.

[0066] In fact, in addition to the valve components mentioned above, the embodiment of the present application can be further provided with more valve components. For example, a plurality of gas cylinders can exist in the hydrogen storage container 22, and each gas cylinder can be individually provided with an opening valve for realizing the opening and closing of the corresponding gas cylinder; the controller 25 can also be connected to these opening valves, so that when a fault of a certain gas cylinder is detected, the opening valve of the corresponding gas cylinder can be directly controlled to be closed, so as to isolate the corresponding gas cylinder.

[0067] Embodiment two

[0068] Please refer to Figure 2 , Figure 2A flow chart of the control method of the fuel cell system of the rail vehicle is shown.

[0069] As shown in Figure 2 The control method of the fuel cell system of the rail vehicle provided by the present application is applicable to the fuel cell system of the rail vehicle involved in Embodiment One, and comprises the following steps: Step S1, detecting the operating condition of the fuel cell system 2; Step S2, judging whether the operating condition is a fault operation, and if yes, executing the following Step S3; Step S4, locating the position where the fault occurs; and Step S5, isolating the position where the fault occurs.

[0070] In practice, whether a fault exists can be determined by monitoring the supply amount or supply pressure of hydrogen, and in the case where a fault exists, the soft pipe section where the fault exists can be located by determining whether the signal cable wound on the soft pipe section is broken, and then the fault can be isolated by controlling the closing of the switch valve upstream and downstream of the corresponding soft pipe section, thereby improving the fault operation capability of the system.

[0071] Of course, the fault can also occur in the hydrogen supply container 22, in which case it can be determined by the pressure monitoring component provided in the corresponding hydrogen supply container 22, and then the fault can be isolated by controlling the corresponding valve box 232a.

[0072] By using the above control method, the embodiment of the present application can only isolate the position where the fault occurs, while the other positions can still work normally, which can greatly avoid the stopping of the rail vehicle due to local faults, and can effectively improve the fault operation capability of the rail vehicle.

[0073] As described in part of Embodiment One, the fuel cell system 2 comprises a hydrogen supply container 22, a hydrogen supply pipe 23 and a hydrogen filling pipe 24, wherein the hydrogen supply pipe 23 comprises a first soft pipe section 231b, and the hydrogen filling pipe 24 comprises a second soft pipe section 242. In the fuel cell system 2 provided by the present application, the position where the fault occurs mainly includes the hydrogen storage container 22, the first soft pipe section 231b and the second soft pipe section 242, and the corresponding fault isolation is mainly aimed at the hydrogen storage container 22, the first soft pipe section 231b and the second soft pipe section 242.

[0074] For the scheme in which the hydrogen storage container 22 comprises a plurality of gas cylinders, the position where the fault occurs can also be a gas cylinder, and therefore the corresponding fault isolation can also be aimed at a specific gas cylinder.

[0075] Embodiment Three

[0076] The application further provides a control method of the fuel cell system of the rail vehicle, which is suitable for the fuel cell system of the rail vehicle of the first embodiment, and specifically comprises the following steps: after the hydrogenation is completed, the gas outlet of each hydrogen storage container 22 is closed, and the hydrogenation pipeline 24 is controlled to be communicated with the fuel cell 21 through the hydrogen supply pipeline 23 for a set time length, so as to effectively reduce the hydrogen pressure in the hydrogenation pipeline 24, thereby improving the safety and avoiding the waste of hydrogen.

[0077] Here, the application does not limit the specific time of the set time length, and in actual application, a person skilled in the art can set it according to specific needs, as long as it can meet the use requirements. For example, the set time length can be 1s-2s, and after being communicated with the fuel cell 21, the gas pressure in the hydrogenation pipeline 24 can be reduced to 1±0.2MPa.

[0078] Embodiment four

[0079] The application further provides a rail vehicle comprising a plurality of car bodies 1, and the rail vehicle further comprises the fuel cell system of the rail vehicle of the first embodiment.

[0080] Since the fuel cell system of the rail vehicle of the first embodiment has the above technical effects, the rail vehicle with the fuel cell system also has similar technical effects, and thus details are not repeated here.

[0081] The above is only the preferred embodiment of the application, and it should be pointed out that, for those skilled in the art, some improvements and refinements can be made without departing from the principles of the application, and these improvements and refinements should also be considered as the protection scope of the application.

Claims

1. A fuel cell system for a rail vehicle, the rail vehicle comprising multiple car sections (1), characterized in that, The fuel cell system (2) includes a fuel cell (21) and a hydrogen storage container (22). The fuel cell (21) and the hydrogen storage container (22) are respectively arranged in different vehicle bodies (1). A hydrogen supply pipeline (23) is configured between the fuel cell (21) and the hydrogen storage container (22). The hydrogen supply pipeline (23) includes a first hose section (231b). The hydrogen supply pipeline (23) is also configured with a valve box (232a). The valve box (232a) is located upstream of the first hose section (231b). A pressure reducing valve is configured inside the valve box (232a). There are multiple hydrogen storage containers (22), each of which is disposed in a different vehicle body (1). Each hydrogen storage container (22) is connected to the fuel cell (21) through the hydrogen supply pipeline (23). The hydrogen supply pipeline (23) includes a main pipeline (231) and several branch pipelines (232). The fuel cell (21) and each of the hydrogen storage containers (22) are connected to the branch pipelines (232), and each branch pipeline (232) is connected to the main pipeline (231). The branch pipe (232) connected to the hydrogen storage container (22) is equipped with the valve box (232a); the main pipe (231) includes alternating first rigid pipe section (231a) and first flexible pipe section (231b), the branch pipe (232) includes a second rigid pipe section connected to the first rigid pipe section (231a), and the portion of the main pipe (231) between two adjacent branch pipes (232) includes the first flexible pipe section (231b). It also includes a hydrogen refueling pipeline (24), which has a hydrogen refueling port (245). The hydrogen refueling pipeline (24) is connected to each of the hydrogen storage containers (22) in sequence. The portion of the hydrogen refueling pipeline (24) located between two adjacent hydrogen storage containers (22) includes a second flexible hose section (242). The hydrogen refueling pipeline (24) is connected to the hydrogen supply pipeline (23), and the connection position between the hydrogen refueling pipeline (24) and the hydrogen supply pipeline (23) is located upstream of the valve box (232a). After hydrogen refueling is completed, the gas outlet of each of the hydrogen storage containers (22) is closed, and the hydrogen refueling pipeline (24) is connected to the fuel cell (21) through the hydrogen supply pipeline (23) for a set time. Both the first hose segment (231b) and the second hose segment (242) are wrapped with signal cables.

2. The fuel cell system for the rail vehicle according to claim 1, characterized in that, A first switching valve (231c) is configured upstream and / or downstream of the first hose segment (231b).

3. The fuel cell system for the rail vehicle according to claim 1, characterized in that, A first safety valve (231d) is provided upstream and / or downstream of the first hose segment (231b).

4. The fuel cell system for the rail vehicle according to claim 1, characterized in that, At least a portion of the first hose segment (231b) is provided with a first check valve (231e) downstream.

5. The fuel cell system for a rail vehicle according to any one of claims 1-4, characterized in that, A second switching valve (243) is configured upstream and / or downstream of the second hose segment (242).

6. The fuel cell system for a rail vehicle according to any one of claims 1-4, characterized in that, A second safety valve (244) is provided upstream and / or downstream of the second hose section (242).

7. The fuel cell system for a rail vehicle according to any one of claims 1-4, characterized in that, A second check valve (246) is provided downstream of the hydrogenation port (245) and downstream of the second hose section (242).

8. The fuel cell system for a rail vehicle according to any one of claims 1-4, characterized in that, It also includes a controller (25).

9. A control method for a fuel cell system of a rail vehicle, characterized in that, The control method for controlling the fuel cell system of the rail vehicle according to any one of claims 1-8 includes: Detect the operating status of the fuel cell system (2); Determine whether the operating status is a fault operation; if so, perform the following steps. Locate the location of the fault; Isolate the location where the incident occurred.

10. The control method for the fuel cell system of a rail vehicle according to claim 9, characterized in that, The fuel cell system (2) further includes a hydrogen refueling pipeline (24), and there are multiple hydrogen storage containers (22). Each hydrogen storage container (22) is respectively configured on a different vehicle body (1). The hydrogen refueling pipeline (24) is connected to each hydrogen storage container (22) in sequence. The portion of the hydrogen refueling pipeline (24) located between two adjacent hydrogen storage containers (22) includes a second flexible hose section (242). The location of occurrence includes the hydrogen storage container (22), the first hose segment (231b), and the second hose segment (242).

11. The control method for the fuel cell system of a rail vehicle according to claim 9 or 10, characterized in that, The hydrogen storage container (22) includes several gas cylinders, and the location of occurrence also includes gas cylinders.

12. A control method for a fuel cell system of a rail vehicle, characterized in that, The control method for the fuel cell system of the rail vehicle according to any one of claims 1-8 is as follows: after hydrogen refueling is completed, the outlet of each of the hydrogen storage containers (22) is closed, and the hydrogen refueling pipeline (24) is connected to the fuel cell (21) through the hydrogen supply pipeline (23) for a set time.

13. A rail vehicle comprising multiple car bodies (1), characterized in that, It also includes the fuel cell system of the rail vehicle as described in any one of claims 1-8.

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