Fuel cell system, method, controller and vehicle

Abstract

The invention relates to a fuel cell system, a method, a controller and a vehicle. The fuel cell system comprises a multifunctional valve, an ejector assembly, a fuel cell stack and the controller, the multifunctional valve comprises a hydrogen inlet pipeline, a first channel, a second channel and a valve element. The ejector assembly comprises a first-stage ejector and a second-stage ejector, an inlet of the first-stage ejector is connected with the first channel, an inlet of the second-stage ejector is connected with the second channel, and outlets of the first-stage ejector and the second-stage ejector are respectively connected with the fuel cell stack; the controller is electrically connected with the multifunctional valve and used for controlling the valve element to move so as to control opening / closing of the first channel and the second channel and the hydrogen flow of the first channel / the second channel. The cost of the fuel cell system is reduced, and the size of the fuel cell system is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fuel cell technology, in particular to a fuel cell system, method, controller and vehicle. BACKGROUND

[0002] The hydrogen fuel cell vehicle is a kind of new energy vehicle, and is praised as the most clean emission access tool in the 21st century, and the hydrogen supply system is an important part of the hydrogen fuel cell, and the hydrogen pressure and flow entering the fuel cell stack need to be adjusted according to the operating condition to ensure the working efficiency of the stack.

[0003] In the related art, the hydrogen pressure and flow are usually adjusted by combining an ejector and a valve before the ejector, and in order to improve the efficiency, two-stage ejectors with different entrainment ratios can also be used to adapt to more stack operating conditions. Therefore, in order to realize the switching of the primary ejector and the secondary ejector and control the hydrogen pressure and flow entering the ejector, multiple sets of valves such as hydrogen shut-off valves, hydrogen proportional valves, hydrogen switching valves, etc. need to be provided in the fuel cell system.

[0004] However, the use of multiple sets of valves not only increases the cost of the fuel cell system, but also requires additional space for arrangement, thereby increasing the volume of the fuel cell system. SUMMARY

[0005] The embodiments of the present application provide a fuel cell system, method, controller and vehicle, which can reduce the cost of the fuel cell system and reduce the volume of the fuel cell system.

[0006] In a first aspect, the embodiments of the present application provide a fuel cell system, comprising: a multifunctional valve (1), an ejector assembly (2), a fuel cell stack (5) and a controller (4);

[0007] The multifunctional valve (1) comprises a hydrogen inlet pipeline (101), a first channel (102), a second channel (103) and a valve core (104);

[0008] The ejector assembly (2) comprises a primary ejector (21) and a secondary ejector (22), the inlet of the primary ejector (21) is connected with the first channel (102), the inlet of the secondary ejector (22) is connected with the second channel (103), and the outlets of the primary ejector (21) and the secondary ejector (22) are respectively connected with the fuel cell stack (5);

[0009] The controller (4) is electrically connected with the multifunctional valve (1) for controlling the spool to move to control the opening / closing of the first channel (102) and the second channel (103) and the hydrogen flow of the first channel (102) / the second channel (103).

[0010] In a possible implementation, the spool (104) comprises a first inlet (R1), a second inlet (R2), a first outlet (C1) and a second outlet (C2), and the spool (104) is configured to:

[0011] When the spool (104) is in the first position, the first channel (102) is open and the second channel (103) is closed, the first inlet (R1) is in communication with the hydrogen inlet pipeline (101), and the second outlet (C2) is in communication with the first channel (102), so that hydrogen enters the primary ejector (21) in sequence through the hydrogen inlet pipeline (101), the spool (104) and the first channel (102);

[0012] When the spool (104) is in the second position, the second channel (103) is open and the first channel (102) is closed, the second inlet (R2) is in communication with the hydrogen inlet pipeline (101), and the first outlet (C1) is in communication with the second channel (103), so that hydrogen enters the secondary ejector (22) in sequence through the hydrogen inlet pipeline (101), the spool (104) and the second channel (103).

[0013] In a possible implementation, the multifunctional valve (1) further comprises a first end plug (105) and a second end plug (106), the first end plug (105) is connected with one end of the spool (104) through a first return spring (107), the second end plug (106) is connected with the other end of the spool (104) through a second return spring (108), and the second end plug (106) is further connected with a solenoid valve seat (109);

[0014] When the multifunctional valve (1) is powered off, the first return spring (107) and the second return spring (108) fix the spool (104) in the third position, and when the spool (104) is in the third position, neither the first inlet (R1) nor the second inlet (R2) is in communication with the hydrogen inlet pipeline (101), and neither the first outlet (C1) nor the second outlet (C2) is in communication with the first channel (102) / the second channel (103).

[0015] In a possible implementation, a pressure sensor (3) is further arranged between the ejector assembly (2) and the fuel cell stack (5), and the controller (4) is connected with the pressure sensor (3) to acquire a pressure value collected by the pressure sensor (3).

[0016] In a possible implementation, the multifunctional valve (1) further comprises a valve housing (110) in which the valve core (104) is arranged, and the valve housing (110) comprises a third inlet (R3), a third outlet (C3), and a fourth outlet (C4).

[0017] The third inlet (R3) is connected with the hydrogen inlet pipeline (101) to enable hydrogen to sequentially pass through the hydrogen inlet pipeline (101), the third inlet (R3), the first inlet (R1) / the second inlet (R2), and enter the valve core (104).

[0018] The third outlet (C3) is connected with the first channel (102), and the fourth outlet (C4) is connected with the second channel (103) to enable hydrogen in the valve core (104) to sequentially pass through the first outlet (C1), the third outlet (C3), the first channel (102), and enter the primary ejector (21), or sequentially pass through the second outlet (C2), the fourth outlet (C4), the second channel (103), and enter the secondary ejector (22).

[0019] In a possible implementation, the outer side of the hydrogen inlet pipeline (101) is sealingly connected with the outer side of the valve housing (110) through a sealing assembly.

[0020] The outer side of the first channel (102) is sealingly connected with the outer side of the valve housing (110) through a sealing assembly, and the outer side of the second channel (103) is sealingly connected with the outer side of the valve housing (110) through a sealing assembly.

[0021] In a second aspect, an embodiment of the present application provides a fuel cell vehicle, comprising the fuel cell system according to any one of the first aspect.

[0022] In a third aspect, an embodiment of the present application provides a control method of a fuel cell system, applied to the fuel cell system according to any one of the first aspect, and comprising:

[0023] In response to a fuel cell system starting instruction or a primary ejector communication instruction, the valve core of the multifunctional valve is controlled to move to a first position to open the first channel, so that hydrogen passes through the first channel and enters the primary ejector, and the valve core is controlled to move to adjust the hydrogen flow of the first channel.

[0024] In response to the secondary ejector communication instruction, the spool is controlled to move to a second position to open a second passage, so that hydrogen gas enters the secondary ejector through the second passage, and the spool is controlled to move to adjust the hydrogen gas flow of the second passage.

[0025] In a possible implementation, the control of the spool to move to adjust the hydrogen gas flow of the first passage / second passage includes:

[0026] The pressure value collected by the pressure sensor and a working condition target pressure value corresponding to a current working condition are obtained.

[0027] When the pressure value is greater than the working condition target pressure value, the spool is controlled to move to reduce the hydrogen gas flow of the first passage / second passage until the pressure value is equal to the working condition target pressure value.

[0028] When the pressure value is less than the working condition target pressure value, the spool is controlled to move to increase the hydrogen gas flow of the first passage / second passage until the pressure value is equal to the working condition target pressure value.

[0029] When the pressure value is equal to the working condition target pressure value, the spool is controlled to remain in the current position.

[0030] In a fourth aspect, an embodiment of the present application provides a controller of a fuel cell system, including:

[0031] A processor and a memory connected with the processor in communication;

[0032] The memory is configured to store computer-executable instructions;

[0033] The processor is configured to execute the computer-executable instructions stored in the memory, so that the processor performs the third aspect and / or various possible implementation manners of the third aspect.

[0034] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, and the computer-readable storage medium stores computer-executable instructions, which are executed by a processor to implement the third aspect and / or various possible implementation manners of the third aspect.

[0035] In a sixth aspect, an embodiment of the present application provides a computer program product, including a computer program, which is executed by a processor to implement the third aspect and / or various possible implementation manners of the third aspect.

[0036] The beneficial effects of the present application are as follows: the multifunctional valve can include a hydrogen inlet pipeline, a first channel, a second channel and a valve core, and hydrogen is connected through the hydrogen inlet pipeline, and the hydrogen flows into the primary ejector through the first channel and flows into the secondary ejector through the second channel. The controller is electrically connected with the multifunctional valve, and the opening / closing of the first channel and the second channel can be controlled by moving the valve core to realize the switching of the primary ejector and the secondary ejector, and the hydrogen flow and pressure of the first channel / second channel can also be controlled by moving the valve core. Through such a setting, the multifunctional valve can integrate the functions of multiple valves, and the switching of the primary ejector and the secondary ejector and the control of the hydrogen flow and pressure in the channel can be realized by using one valve, thereby effectively reducing the cost of the fuel cell system, and without the need for extra layout space, the volume of the fuel cell system is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 Structure schematic diagram of the fuel cell system of an embodiment of the present application;

[0038] Figure 2 Structure schematic diagram of the multifunctional valve of an embodiment of the present application when closed;

[0039] Figure 3 Structure schematic diagram of the multifunctional valve of an embodiment of the present application when the first channel is opened;

[0040] Figure 4 Structure schematic diagram of the multifunctional valve of an embodiment of the present application when the second channel is opened;

[0041] Figure 5 Flow chart of the control method of the fuel cell system of an embodiment of the present application;

[0042] Figure 6 Control process schematic diagram of the fuel cell system of an embodiment of the present application;

[0043] Figure 7 Structure schematic diagram of the controller of the fuel cell system of an embodiment of the present application.

[0044] Fig. 1 is a multifunctional valve; 101 is a hydrogen inlet pipeline; 102 is a first channel; 103 is a second channel; 104 is a valve core; 105 is a first end plug; 106 is a second end plug; 107 is a first return spring; 108 is a second return spring; 109 is an electromagnetic valve seat; 110 is a valve housing; 2 is an ejector assembly; 21 is a primary ejector; 22 is a secondary ejector; 3 is a pressure sensor; 4 is a controller; 5 is a fuel cell stack; R1 is a first inlet; R2 is a second inlet; R3 is a third inlet; C1 is a first outlet; C2 is a second outlet; C3 is a third outlet; C4 is a fourth outlet. DETAILED DESCRIPTION

[0045] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, like reference numerals refer to like elements, unless the context clearly dictates otherwise. The following description is not meant to limit the application to all of the embodiments described herein. Rather, the following description is meant to provide examples of apparatus and methods consistent with the application as detailed in the appended claims.

[0046] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present application, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms herein is to be construed to cover a general order and / or structure unless otherwise indicated by the context thereof. Furthermore, the foregoing description is not intended to represent that the application will necessarily accomplish all of the ends, advantages and / or objects disclosed herein, since some of the exemplary embodiments of the present application can not accomplish all of the ends, advantages and / or objects disclosed herein.

[0047] It should be noted that in the embodiments of the present application, some software, components, models and the like in the industry may be mentioned, which should be considered as exemplary, and the purpose is only to illustrate the feasibility of the technical solutions of the present application, but it does not mean that the applicant has or will necessarily use the scheme.

[0048] The fuel cell system, method, controller and vehicle of the present application can be used in the field of fuel cell technology, and can also be used in any field other than the field of fuel cell technology, such as the field of new energy technology, and the application field of the fuel cell system, method, controller and vehicle of the present application is not limited.

[0049] The fuel cell system, method, controller and vehicle of the present application can be applied to the use scenario of hydrogen fuel cell vehicles, as long as the hydrogen fuel cell vehicles include a two-stage ejector, the fuel cell system, method, controller and vehicle of the present application can be applied.

[0050] First, the terms involved in the present application are explained:

[0051] Ejector, the ejector in fuel cell system is the key component to realize the hydrogen circulation in anode, which uses the energy of the unreacted hydrogen (high pressure working fluid) at the outlet of the stack to suck in fresh hydrogen (low pressure ejector fluid) and mix them to send them into the anode inlet of the stack, so as to improve the hydrogen utilization and maintain the water-thermal balance in the anode flow channel.

[0052] Fuel Cell Control Unit (FCCU), is the core control unit of fuel cell system, responsible for coordinating the key functions such as hydrogen supply, air management, thermal management, stack protection and fault diagnosis.

[0053] Based on the technical problems proposed, the inventive concept of the present application is to provide a fuel cell solution capable of reducing the cost and size of the fuel cell system.

[0054] The fuel cell system, method, controller and vehicle provided by the embodiments of the present application can realize the switching of the primary ejector and the secondary ejector, and control the hydrogen flow and pressure in the first channel and the second channel by moving the valve core, thereby effectively reducing the cost of the fuel cell system and reducing the size of the fuel cell system.

[0055] The technical solutions of the present application and how the technical solutions solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0056] Figure 1 The structure schematic diagram of the fuel cell system of an embodiment of the present application is shown in FIG. 1, which comprises a multifunctional valve (1), an ejector assembly (2), a fuel cell stack (5) and a controller (4). Figure 1

[0057] Figure 2 The structure schematic diagram of the multifunctional valve when closed of an embodiment of the present application is shown in FIG. 2, which comprises a hydrogen inlet pipeline (101), a first channel (102), a second channel (103) and a valve core (104). Figure 2 ​As shown, the multifunctional valve (1) comprises a hydrogen inlet pipeline (101), a first channel (102), a second channel (103) and a valve core (104);

[0058] The ejector assembly (2) comprises a primary ejector (21) and a secondary ejector (22), the inlet of the primary ejector (21) is connected with the first channel (102), the inlet of the secondary ejector (22) is connected with the second channel (103), the outlets of the primary ejector (21) and the secondary ejector (22) are respectively connected with the fuel cell stack (5);

[0059] The controller (4) is electrically connected with the multifunctional valve (1) for controlling the valve core to move, so as to control the opening / closing of the first channel (102) and the second channel (103) and the hydrogen flow of the first channel (102) / the second channel (103).

[0060] In this embodiment, the hydrogen inlet pipeline (101) can be used to connect the hydrogen to the valve core (104), and the first channel (102) and the second channel (103) can be used to introduce the hydrogen from the valve core (104) to the primary ejector (21) or the secondary ejector (22).

[0061] In this embodiment, the hydrogen inlet pipeline (101), the first channel (102) and the second channel (103) can be integrally arranged with the valve housing of the multifunctional valve (1), or can be connected with the valve housing through a connecting piece.

[0062] In this embodiment, the first channel (102) and the second channel (103) in the multifunctional valve (1) are arranged in parallel, and the primary ejector (21) and the secondary ejector (22) in the ejector assembly (2) are arranged in parallel, that is, only one ejector is used for hydrogen injection at a time. The outlets of the primary ejector (21) and the secondary ejector (22) can be connected to the downstream pipeline together or separately, and the downstream pipeline is connected with the fuel cell stack (5).

[0063] In this embodiment, the opening of the primary ejector (21) and the secondary ejector (22) can be determined according to the specific working condition. The vehicle controller or the body domain controller can collect relevant parameters after the vehicle starts and determine the working condition according to the parameters, and then determine the ejector to be opened according to the working load / power. The primary ejector (21) can correspond to low and medium load conditions (power of 10-20KW), and the secondary ejector (22) can correspond to medium and high load conditions (power of 15-30KW).

[0064] In this embodiment, the fuel cell stack (5) can receive hydrogen from the ejector assembly (2) for electrochemical reaction to generate electricity.

[0065] In the embodiment, the controller (4) can be a fuel cell controller unit (FCCU), and the controller (4) can be connected with the multifunctional valve (1) through a wire harness to control the spool (104) to move.

[0066] In the embodiment, when the vehicle starts or the working condition changes, the vehicle controller or the body domain controller can send a fuel cell starting instruction or a primary ejector connection instruction / secondary ejector connection instruction to the FCCU, and the FCCU can send power to the multifunctional valve (1) after receiving the instruction, and control the spool (104) to move to open the first channel (102) / second channel (103), so as to open the primary ejector (21) / secondary ejector (22) for hydrogen transmission.

[0067] In the embodiment, when the first channel (102) is opened, the first channel (102) is in communication with the spool (104), and the spool (104) is also in communication with the hydrogen inlet pipeline (101), and the hydrogen enters the primary ejector (21) through the hydrogen inlet pipeline (101), the spool (104) and the first channel (102).

[0068] In the embodiment, when the second channel (103) is opened, the second channel (103) is in communication with the spool (104), and the spool (104) is also in communication with the hydrogen inlet pipeline (101), and the hydrogen enters the secondary ejector (22) through the hydrogen inlet pipeline (101), the spool (104) and the second channel (103).

[0069] In the embodiment, after the FCCU opens the first channel (102) / second channel (103), the spool (104) can also be controlled to move in a small range at the opening position to adjust the hydrogen flow area in the channel, so as to adjust the hydrogen flow and pressure.

[0070] In the embodiment, the multifunctional valve can include a hydrogen inlet pipeline, a first channel, a second channel and a spool, and the hydrogen is connected through the hydrogen inlet pipeline, the hydrogen flows into the primary ejector through the first channel, and the hydrogen flows into the secondary ejector through the second channel. The controller is electrically connected with the multifunctional valve, and the first channel and the second channel can be controlled to be opened / closed by controlling the spool to move, so as to realize the switching of the primary ejector and the secondary ejector, and the hydrogen flow and pressure in the channel can also be controlled by controlling the spool to move. Through such a design, the multifunctional valve can integrate the functions of multiple valves, and the switching of the primary ejector and the secondary ejector and the control of the hydrogen flow and pressure in the channel can be realized by using one valve, which effectively reduces the cost of the fuel cell system, and does not need extra layout space, and reduces the volume of the fuel cell system.

[0071] In one possible implementation, as Figure 2As shown, the valve core (104) includes a first inlet (R1), a second inlet (R2), a first outlet (C1) and a second outlet (C2), and the valve core (104) is configured as follows:

[0072] Figure 3 This is a structural diagram of a multifunctional valve according to an embodiment of the present invention when the first channel is opened. Figure 3 for Figure 2 The valve core (104) in the left shift is obtained, such as Figure 3 As shown, when the valve core (104) is in the first position, the first channel (102) is opened and the second channel (103) is closed, the first inlet (R1) is connected to the hydrogen inlet pipeline (101), and the second outlet (C2) is connected to the first channel (102), so that hydrogen enters the first-stage ejector (21) through the hydrogen inlet pipeline (101), the valve core (104), and the first channel (102) in sequence. Figure 3 The arrows in the middle indicate the hydrogen flow path.

[0073] Figure 4 This is a structural diagram of a multifunctional valve according to an embodiment of the present invention when the second channel is opened. Figure 4 for Figure 2 / Figure 3 The valve core (104) in the right is moved to obtain Figure 4 As shown, when the valve core (104) is in the second position, the second channel (103) is opened and the first channel (102) is closed, the second inlet (R2) is connected to the hydrogen inlet pipeline (101), and the first outlet (C1) is connected to the second channel (103), so that hydrogen enters the secondary ejector (22) through the hydrogen inlet pipeline (101), the valve core (104), and the second channel (103) in sequence. Figure 4 The arrows in the middle indicate the hydrogen flow path.

[0074] In this embodiment, if Figure 2 / Figure 3 / Figure 4 As shown, two communicating cross-shaped channels are provided inside the valve core (104), and the channels include a first inlet (R1), a second inlet (R2), a first outlet (C1) and a second outlet (C2).

[0075] In this embodiment, the specific first position can be flexibly set by those skilled in the art according to actual conditions, as long as the valve core (104) is in the first position, the first inlet (R1) is connected to the hydrogen inlet pipeline (101), and the second outlet (C2) is connected to the first channel (102).

[0076] Similarly, those skilled in the art can flexibly set the specific second position according to actual conditions, as long as the valve core (104) is in the second position, the second inlet (R2) is connected to the hydrogen inlet pipeline (101), and the first outlet (C1) is connected to the second channel (103).

[0077] In this embodiment, if Figure 2 As shown, when the multifunctional valve (1) is closed, the first inlet (R1) and the second inlet (R2) are not connected to the hydrogen inlet pipeline (101), the first outlet (C1) and the second outlet (C2) are not connected to the first channel (102) / the second channel (103), and no hydrogen is input to the first ejector (21) and the second ejector (22).

[0078] In this embodiment, when the first-stage ejector is turned on, the controller can move the valve core to the first position to open the first channel, so that hydrogen can be transmitted to the first-stage ejector through the first channel. When the second-stage ejector is turned on, the controller can move the valve core to the second position to open the second channel, so that hydrogen can be transmitted to the second-stage ejector through the second channel.

[0079] In one possible implementation, Figure 2 As shown, the multifunctional valve (1) further comprises a first end plug (105) and a second end plug (106), wherein the first end plug (105) is connected to one end of the valve core (104) via a first return spring (107), and the second end plug (106) is connected to the other end of the valve core (104) via a second return spring (108), and the second end plug (106) is also connected to the electromagnetic valve seat (109);

[0080] When the multifunctional valve (1) is powered off, the first return spring (107) and the second return spring (108) fix the valve core (104) in the third position. When the valve core (104) is in the third position, the first inlet (R1) and the second inlet (R2) are not connected to the hydrogen inlet pipeline (101), and the first outlet (C1) and the second outlet (C2) are not connected to the first channel (102) / the second channel (103).

[0081] In this embodiment, one end of the first end plug (105) may include a protruding connecting column, which is connected to one end of the valve core (104), and a first return spring (107) is connected in series to the outer side of the connecting column.

[0082] Similarly, one end of the second end plug (106) may also include a protruding connecting column, which is connected to one end of the valve core (104), and a second return spring (108) is connected in series to the outside of the connecting column, and the connecting column is also connected to the solenoid valve seat (109).

[0083] In the present embodiment, the electromagnetic valve seat (109) can contain an electromagnetic actuator (such as a proportional solenoid or a stepper motor) to drive the axial movement of the spool (104).

[0084] In the present embodiment, the third position can be the initial position of the spool (104), when the fuel cell stack is turned off or the fuel cell system / multi-functional valve is powered off, the spool (104) will return to the third position, at this time the first passage (102) and the second passage (103) are both closed, to ensure that hydrogen gas cannot enter the ejector assembly (2).

[0085] In the present embodiment, the specific third position can be flexibly set by those skilled in the art according to the actual situation, as long as the spool (104) is in the third position, the first inlet (R1) and the second inlet (R2) are not in communication with the hydrogen inlet pipeline (101), and the first outlet (C1) and the second outlet (C2) are not in communication with the first passage (102) / second passage (103).

[0086] In the present embodiment, the spool can be provided with two inlet and outlet ports, which cooperate with the hydrogen inlet pipeline, the first passage and the second passage to transmit hydrogen. When the multi-functional valve is powered on, the controller can drive the spool to move through the electromagnetic valve seat, to switch the first passage and the second passage, and adjust the hydrogen flow rate. When the multi-functional valve is powered off, the first return spring and the second return spring can fix the spool in the third position, so that the first passage and the second passage are both closed.

[0087] In one possible embodiment, as shown in Figure 1 The ejector assembly (2) and the fuel cell stack (5) can also be provided with a pressure sensor (3), and the controller (4) is connected with the pressure sensor (3) to obtain the pressure value collected by the pressure sensor (3).

[0088] In the present embodiment, the pressure sensor (3) can be arranged on the hydrogen supply main pipeline between the outlet of the ejector assembly (2) and the anode inlet of the fuel cell stack (5), for detecting the hydrogen pressure before entering the stack.

[0089] In the present embodiment, the controller (4) can be connected with the pressure sensor (3) through a wire harness to obtain the pressure value of the outlet of the ejector assembly (2) collected by the pressure sensor (3).

[0090] In the present embodiment, the controller can obtain the pressure value of the outlet of the ejector assembly through the pressure sensor arranged on the main pipeline between the outlet of the ejector assembly and the inlet of the fuel cell stack.

[0091] In one possible embodiment, as shown in Figure 2As shown, the multifunctional valve (1) can further include a valve housing (110) in which the valve core (104) is built, and the valve housing (110) includes a third inlet (R3), a third outlet (C3) and a fourth outlet (C4);

[0092] The third inlet (R3) is connected with the hydrogen inlet pipeline (101) to make the hydrogen enter the valve core (104) in sequence through the hydrogen inlet pipeline (101), the third inlet (R3), the first inlet (R1) / the second inlet (R2).

[0093] The third outlet (C3) is connected with the first channel (102), and the fourth outlet (C4) is connected with the second channel (103) to make the hydrogen in the valve core (104) enter the primary ejector (21) in sequence through the first outlet (C1), the third outlet (C3) and the first channel (102), or enter the secondary ejector (22) in sequence through the second outlet (C2), the fourth outlet (C4) and the second channel (103).

[0094] In the embodiment, the connection mode of the third inlet (R3) with the hydrogen inlet pipeline (101), the connection mode of the third outlet (C3) with the first channel (102), and the connection mode of the fourth outlet (C4) with the second channel (103) are not limited, as long as they can ensure firm connection between the third inlet (R3) and the hydrogen inlet pipeline (101), between the third outlet (C3) and the first channel (102), and between the fourth outlet (C4) and the second channel (103).

[0095] Alternatively, the valve housing (110) can be integrally formed with the hydrogen inlet pipeline (101), the first channel (102) and the second channel (103).

[0096] In the embodiment, the valve housing can be provided with a pipe opening at a position corresponding to the hydrogen inlet pipeline, the first channel and the second channel, so that the valve housing, the valve core, the first channel and the second channel cooperate to form two hydrogen transmission paths, and the valve core can move inside the valve housing to switch the two hydrogen transmission paths.

[0097] In a possible embodiment, the outer side of the hydrogen inlet pipeline (101) is sealingly connected with the outer side of the valve housing (110) through a sealing assembly;

[0098] The outer side of the first channel (102) is sealingly connected with the outer side of the valve housing (110) through a sealing assembly, and the outer side of the second channel (103) is sealingly connected with the outer side of the valve housing (110) through a sealing assembly.

[0099] In the embodiment, the type of the sealing assembly can be flexibly set by those skilled in the art according to actual conditions, and is not limited herein, for example, the sealing assembly can be an O-ring or the like, as long as the sealing assembly can prevent hydrogen from leaking out of the connection.

[0100] In the embodiment, sealing assemblies can be arranged outside the hydrogen inlet pipeline, the first channel, the second channel and the valve housing to prevent hydrogen from leaking out.

[0101] Figure 5 The flowchart of the control method of the fuel cell system of the embodiment is shown in FIG. 5. Figure 1 The controller FCCU of the fuel cell system is used to control the control method of the fuel cell system. Figure 5 As shown in FIG. 5, the control method of the fuel cell system can include the following steps.

[0102] S501: In response to a fuel cell system start instruction or a primary ejector connection instruction, the valve core of the multifunctional valve is controlled to move to a first position to open the first channel, so that hydrogen enters the primary ejector through the first channel, and the valve core is controlled to move to adjust the hydrogen flow of the first channel.

[0103] In the embodiment, after the vehicle is started, the vehicle controller or the body domain controller sends a fuel cell system start instruction to the FCCU to start the fuel cell system and wake up the FCCU, and the FCCU controls the valve core of the multifunctional valve to move (the valve core is moved left by the valve core) to the first position to open the first channel. Figure 2 to Figure 3

[0104] In the embodiment, during the operation, the vehicle controller or the body domain controller also collects relevant parameters and determines the working condition according to the parameters, determines the ejector to be opened according to the working condition load / power, and if the primary ejector is determined to be opened at a certain moment, the vehicle controller or the body domain controller sends a primary ejector connection instruction to the FCCU, and the FCCU controls the valve core of the multifunctional valve to move to the first position to open the first channel.

[0105] In the embodiment, after the first channel is opened, the FCCU can control the valve core to move (left / right) near the first position to adjust the hydrogen flow of the first channel.

[0106] S502: In response to a secondary ejector connection instruction, the valve core is controlled to move to a second position to open the second channel, so that hydrogen enters the secondary ejector through the second channel, and the valve core is controlled to move to adjust the hydrogen flow of the second channel.

[0107] ​In this embodiment, during the working process, the vehicle controller or the body domain controller will also collect relevant parameters and determine the working condition according to the parameters. The vehicle controller or the body domain controller will send a second-stage ejector connection instruction to the FCCU if it is determined to open the second-stage ejector at a certain moment. The FCCU controls the spool of the multifunctional valve to move (rightward movement) to the second position to open the second channel. Figure 3 to Figure 4

[0108] In this embodiment, after the second channel is opened, the FCCU can control the spool to move (leftward / rightward movement) near the second position to adjust the hydrogen flow of the second channel.

[0109] In this embodiment, the multifunctional valve can include a hydrogen inlet pipeline, a first channel, a second channel, and a spool. Hydrogen is connected through the hydrogen inlet pipeline, hydrogen flows into the first-stage ejector through the first channel, and hydrogen flows into the second-stage ejector through the second channel. The controller is electrically connected with the multifunctional valve, which can control the opening / closure of the first channel and the second channel by controlling the movement of the spool, realize the switching of the first-stage ejector and the second-stage ejector, and also can control the hydrogen flow and pressure of the first channel / second channel by controlling the movement of the spool. Through such a setting, the multifunctional valve can integrate the functions of multiple valves, and the switching of the first-stage ejector and the second-stage ejector, as well as the control of the hydrogen flow and pressure in the channel, can be realized by using one valve, which effectively reduces the cost of the fuel cell system, and does not need extra layout space, and reduces the volume of the fuel cell system.

[0110] In one possible implementation, the above-mentioned control of the movement of the spool to adjust the hydrogen flow of the first channel / second channel can include:

[0111] S11: Obtain the pressure value collected by the pressure sensor and the working condition target pressure value corresponding to the current working condition.

[0112] S12: When the pressure value is greater than the working condition target pressure value, control the spool to move to reduce the hydrogen flow of the first channel / second channel until the pressure value is equal to the working condition target pressure value.

[0113] S13: When the pressure value is less than the working condition target pressure value, control the spool to move to increase the hydrogen flow of the first channel / second channel until the pressure value is equal to the working condition target pressure value.

[0114] S14: When the pressure value is equal to the working condition target pressure value, the spool remains at the current position.

[0115] ​In this embodiment, the controller may obtain the pressure value of the ejector assembly outlet via a pressure sensor provided on the main pipeline between the ejector assembly outlet and the fuel cell stack inlet.

[0116] In this embodiment, different operating conditions may correspond to different operating condition target pressure values. Those skilled in the art may calibrate the fuel cell system in advance to obtain the ejector and operating condition target pressure values ​​corresponding to the fuel cell system under different operating conditions, and write the ejector corresponding to the fuel cell system under different operating conditions into the vehicle controller or the body domain controller, and write the operating condition target pressure values ​​corresponding to the fuel cell system under different operating conditions into the FCCU.

[0117] For example, under a certain working condition A, the fuel cell system uses the first channel and the first-stage ejector to transmit hydrogen. The pressure value of the ejector assembly outlet collected by the pressure sensor at time T1 is P 10 The target pressure value of the working condition A is P 目标1 ;Then the controller will compare P 10 、P 目标1 size and make a judgment.

[0118] If P 10 >P 目标1 , it means that the pressure value at the outlet of the ejector assembly is greater than the target pressure value of the working condition, then it is necessary to move the FCCU control valve core to reduce the hydrogen flow area of ​​the first channel, reduce the hydrogen flow of the first channel, and reduce the pressure value P at the outlet of the ejector assembly. 10 ;

[0119] If P 10 <P 目标1 , it means that the pressure value at the outlet of the ejector assembly is less than the target pressure value of the working condition, then it is necessary to move the FCCU control valve core to increase the hydrogen flow area of ​​the first channel, increase the hydrogen flow rate of the first channel, and increase the pressure value P at the outlet of the ejector assembly. 10 ;

[0120] If P 10 =P 目标1 , it means that the pressure value at the outlet of the ejector assembly is equal to the target pressure value of the working condition, then it is necessary to control the valve core through the FCCU to maintain the current position and maintain the pressure value P at the outlet of the ejector assembly. 10 .

[0121] For example, under a certain working condition B, the fuel cell system uses the second channel and the secondary ejector to transmit hydrogen. The pressure value of the ejector assembly outlet collected by the pressure sensor at time T2 is P 20 The target pressure value of the working condition A is P 目标2 ;Then the controller will compare P20 、P 目标2 size and make a judgment.

[0122] If P 20 >P 目标2 , it means that the pressure value at the outlet of the ejector assembly is greater than the target pressure value of the working condition, then it is necessary to move the FCCU control valve core to reduce the hydrogen flow area of ​​the second channel, reduce the hydrogen flow of the second channel, and reduce the pressure value P at the outlet of the ejector assembly. 20 ;

[0123] If P 20 <P 目标2 , it means that the pressure value at the outlet of the ejector assembly is less than the target pressure value of the working condition, then it is necessary to move the FCCU control valve core to increase the hydrogen flow area of ​​the second channel, increase the hydrogen flow rate of the second channel, and increase the pressure value P at the outlet of the ejector assembly. 20 ;

[0124] If P 20 =P 目标2 , it means that the pressure value at the outlet of the ejector assembly is equal to the target pressure value of the working condition, then it is necessary to control the valve core through the FCCU to maintain the current position and maintain the pressure value P at the outlet of the ejector assembly. 20 .

[0125] In this embodiment, when the fuel cell stack is turned off, the FCCU can control the valve core to return to the initial position (third position) and close the first channel and the second channel at the same time. After the fuel cell system / multi-function valve is powered off, the valve core will also remain in the initial position under the joint action of the first return spring and the second return spring to ensure that hydrogen does not enter the ejector assembly.

[0126] In this embodiment, the controller can adjust the position of the valve core according to the pressure value at the outlet of the ejector assembly and the target pressure value corresponding to the current working condition to adjust the hydrogen flow and pressure of the channel so that the pressure value is equal to the target pressure value, thereby using different working conditions and improving work efficiency.

[0127] The application process of the fuel cell system of the present invention is described below with reference to a specific embodiment.

[0128] In a specific embodiment, the fuel cell system includes a multifunctional valve (1), an ejector assembly (2), a fuel cell stack (5), a controller (4) and a pressure sensor (3), wherein the pressure sensor (3) is arranged between the ejector assembly (2) and the fuel cell stack (5), and the controller (4) is connected to the multifunctional valve (1) and the pressure sensor (3) respectively through a wiring harness.

[0129] The multifunctional valve (1) comprises a hydrogen inlet pipeline (101), a first channel (102), a second channel (103), a valve core (104), a first end plug (105), a second end plug (106), a valve shell (110), the valve shell (110) is internally provided with the valve core (104), the first end plug (105) is connected with one end of the valve core (104) through a first return spring (107), the second end plug (106) is connected with the other end of the valve core (104) through a second return spring (108), and the second end plug (106) is also connected with a solenoid valve seat (109).

[0130] The injector assembly (2) comprises a first-stage injector (21) and a second-stage injector (22), the inlet of the first-stage injector (21) is connected with the first channel (102), the inlet of the second-stage injector (22) is connected with the second channel (103), and the outlets of the first-stage injector (21) and the second-stage injector (22) are respectively connected with a fuel cell stack (5).

[0131] The valve core (104) comprises a first inlet (R1), a second inlet (R2), a first outlet (C1) and a second outlet (C2), the valve shell (110) comprises a third inlet (R3), a third outlet (C3) and a fourth outlet (C4), the third inlet (R3) is connected with the hydrogen inlet pipeline (101) to make hydrogen enter the valve core (104) through the hydrogen inlet pipeline (101), the third inlet (R3), the first inlet (R1) / the second inlet (R2) in sequence, the third outlet (C3) is connected with the first channel (102), and the fourth outlet (C4) is connected with the second channel (103) to make hydrogen in the valve core (104) enter the first-stage injector (21) through the first outlet (C1), the third outlet (C3) and the first channel (102) in sequence or enter the second-stage injector (22) through the second outlet (C2), the fourth outlet (C4) and the second channel (103) in sequence.

[0132] The outer side of the hydrogen inlet pipeline (101) is sealingly connected with the outer side of the valve shell (110) through a sealing assembly, the outer side of the first channel (102) is sealingly connected with the outer side of the valve shell (110) through a sealing assembly, and the outer side of the second channel (103) is sealingly connected with the outer side of the valve shell (110) through a sealing assembly.

[0133] Figure 6 The control process of the fuel cell system is shown in the figure. Figure 6 As shown in the figure, after the vehicle is started, the vehicle controller or the body domain controller sends a fuel cell system starting instruction to the controller (4) to start the fuel cell system and wake up the controller (4), and the controller (4) controls the valve core (104) of the multifunctional valve (1) to move to the first position to open the first channel (102).

[0134] When the valve core (104) is in the first position, the first channel (102) is open, and the second channel (103) is closed, the first inlet (R1) is in communication with the hydrogen inlet pipeline (101), and the second outlet (C2) is in communication with the first channel (102), so that the hydrogen enters the primary ejector (21) in turn through the hydrogen inlet pipeline (101), the valve core (104) and the first channel (102).

[0135] The controller (4) acquires the pressure value P 10 of the ejector assembly (2) outlet collected by the pressure sensor (3) at time T1, and the working condition target pressure value corresponding to the current working condition is P 目标1 ; Then the controller (4) compares the size of P 10 and P 目标1 , and judges:

[0136] If P 10 >P 目标1 , it means that the pressure value of the ejector assembly (2) outlet is greater than the working condition target pressure value, then the controller (4) controls the valve core (104) to move, reduces the hydrogen flow area of the first channel (102), reduces the hydrogen flow of the first channel (102), and reduces the pressure value P 10 of the ejector assembly outlet (2);

[0137] If P 10 <P 目标1 , it means that the pressure value of the ejector assembly (2) outlet is less than the working condition target pressure value, then the controller (4) controls the valve core (104) to move, increases the hydrogen flow area of the first channel (102), increases the hydrogen flow of the first channel (102), and increases the pressure value P 10 of the ejector assembly outlet (2);

[0138] If P 10 =P 目标1 , it means that the pressure value of the ejector assembly (2) outlet is equal to the working condition target pressure value, then the controller (4) controls the valve core (104) to keep the current position, and keeps the pressure value P 10 of the ejector assembly outlet (2).

[0139] At a certain time, the working condition changes to high load working condition, and the vehicle controller or body domain controller sends the secondary ejector communication instruction to the controller (4), and the controller (4) controls the valve core (104) of the multifunctional valve (1) to move to the second position to open the second channel (103).

[0140] When the valve core (104) is in the second position, the second channel (103) is open, and the first channel (102) is closed, the second inlet (R2) is in communication with the hydrogen inlet pipeline (101), and the first outlet (C1) is in communication with the second channel (103), so that the hydrogen enters the secondary ejector (22) in turn through the hydrogen inlet pipeline (101), the valve core (104) and the second channel (103).

[0141] The controller (4) acquires the pressure value P of the ejector assembly (2) outlet collected by the pressure sensor (3) at time T2. 20 The working condition corresponding to the working condition target pressure value is P 目标2 ; then the controller (4) compares the size of P 20 , P 目标2 , and makes a judgment:

[0142] If P 20 >P 目标2 , it means that the pressure value of the ejector assembly (2) outlet is greater than the working condition target pressure value, then the controller (4) controls the valve core (104) to move, reduces the hydrogen flow area of the second channel (103), reduces the hydrogen flow of the second channel (103), and reduces the pressure value P 20 of the ejector assembly (2) outlet.

[0143] If P 20 <P 目标2 , it means that the pressure value of the ejector assembly (2) outlet is less than the working condition target pressure value, then the controller (4) controls the valve core (104) to move, increases the hydrogen flow area of the second channel (103), increases the hydrogen flow of the second channel (103), and increases the pressure value P 20 of the ejector assembly (2) outlet.

[0144] If P 20 =P 目标2 , it means that the pressure value of the ejector assembly (2) outlet is equal to the working condition target pressure value, then the controller (4) controls the valve core (104) to keep the current position, and keeps the pressure value P 20 of the ejector assembly (2) outlet.

[0145] At a certain time, the fuel cell stack (5) is closed, the first return spring (107) and the second return spring (108) fix the valve core (104) in the third position, when the valve core (104) is in the third position, the first inlet (R1) and the second inlet (R2) are not in communication with the hydrogen inlet pipeline (101), and the first outlet (C1) and the second outlet (C2) are not in communication with the first channel (102) / second channel (103).

[0146] Figure 7FIG. 1 is a schematic diagram of a controller of a fuel cell system according to an embodiment of the present invention. Figure 7 As shown, the controller of the fuel cell system includes: a processor 701, and a memory 702 communicatively connected to the processor 701; the memory 702 stores computer-executable instructions; the processor 701 executes the computer-executable instructions stored in the memory 702 to implement the steps of the control method of the fuel cell system in the above-mentioned method embodiments.

[0147] In the controller of the above-mentioned fuel cell system, the memory 702 and the processor 701 are electrically connected directly or indirectly to realize data transmission or interaction. For example, these components can be electrically connected to each other via one or more communication buses or signal lines, such as via a bus connection. The memory 702 stores computer-executable instructions for implementing the data access control method, including at least one software function module that can be stored in the memory 702 in the form of software or firmware. The processor 701 executes various functional applications and data processing by running the software programs and modules stored in the memory 702.

[0148] The memory 702 may be, but is not limited to, a random access memory (RAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc. The memory 702 is used to store programs, and the processor 701 executes the programs after receiving execution instructions. Furthermore, the software programs and modules in the memory 702 may also include an operating system, which may include various software components and / or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.

[0149] The processor 701 can be an integrated circuit chip having a processing capability of signals. The processor 701 described above can be a general processor, including a central processing unit (CPU), a network processor (NP), etc. The processor can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general processor can be a microprocessor or the processor can also be any conventional processor.

[0150] An embodiment of the present application further provides a fuel cell vehicle, comprising: Figure 1 a fuel cell system as shown in Figure 2 / Figure 3 / Figure 4 a multifunctional valve as shown in Figure 7 and a controller of the fuel cell system as shown in

[0151] An embodiment of the present application further provides a computer readable storage medium, wherein a computer execution instruction is stored in the computer readable storage medium, and the computer execution instruction is used for implementing the steps of the method embodiments of the present application when executed by a processor.

[0152] An embodiment of the present application further provides a computer program product, comprising a computer program, and the computer program is used for implementing the steps of the method embodiments of the present application when executed by a processor.

[0153] It should be noted that, for the foregoing method embodiments, in order to simply describe, the method embodiments are all described as a series of action combinations, but those skilled in the art should know that the present application is not limited to the order of the actions described, because according to the present application, certain steps can be performed in other order or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to optional embodiments, and the actions and modules involved are not necessarily required by the present application.

[0154] It should be further noted that, although the steps in the flowchart are displayed in sequence according to the arrow, these steps are not necessarily executed in sequence according to the arrow. Unless otherwise specified in this article, the execution of these steps has no strict order limit, and these steps can be executed in other order. Moreover, at least part of the steps in the flowchart can include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these sub-steps or stages is not necessarily sequential, but can be executed in rotation or alternation with other steps or sub-steps or stages of other steps.

[0155] It should be understood that the above-mentioned apparatus embodiments are merely illustrative, and the apparatus of the present application can also be implemented in other manners. For example, the division of the units / modules in the above-mentioned embodiments is merely a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units / modules or components can be combined, or can be integrated into another system, or some features can be ignored or not executed.

[0156] In addition, unless specifically stated otherwise, each functional unit / module in each embodiment of the present application can be integrated in one unit / module, or each unit / module can exist physically, or two or more units / modules can be integrated together. The integrated unit / module can be realized in the form of hardware or in the form of a software program module.

[0157] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. Each technical feature of the above embodiments can be combined arbitrarily, and in order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0158] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the application pertains. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the application are indicated by the appended claims.

[0159] It should be understood that the present application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the present application. The scope of the present application is limited only by the appended claims.

Claims

1. A fuel cell system, characterized in that: include: Multifunctional valve (1), ejector assembly (2), fuel cell stack (5) and controller (4); The multifunctional valve (1) comprises a hydrogen inlet pipeline (101), a first channel (102), a second channel (103) and a valve core (104); The ejector assembly (2) comprises a primary ejector (21) and a secondary ejector (22), the inlet of the primary ejector (21) being connected to the first channel (102), the inlet of the secondary ejector (22) being connected to the second channel (103), and the outlets of the primary ejector (21) and the secondary ejector (22) being connected to the fuel cell stack (5) respectively; The controller (4) is electrically connected to the multifunctional valve (1) and is used to control the movement of the valve core to control the opening / closing of the first channel (102) and the second channel (103), as well as the hydrogen flow rate of the first channel (102) / the second channel (103).

2. The fuel cell system according to claim 1, wherein: The valve core (104) includes a first inlet (R1), a second inlet (R2), a first outlet (C1) and a second outlet (C2), and the valve core (104) is configured as follows: When the valve core (104) is in the first position, the first channel (102) is opened and the second channel (103) is closed, the first inlet (R1) is connected to the hydrogen inlet pipeline (101), and the second outlet (C2) is connected to the first channel (102), so that hydrogen enters the first-stage ejector (21) through the hydrogen inlet pipeline (101), the valve core (104), and the first channel (102) in sequence; When the valve core (104) is in the second position, the second channel (103) is opened and the first channel (102) is closed, the second inlet (R2) is connected to the hydrogen inlet pipeline (101), and the first outlet (C1) is connected to the second channel (103), so that hydrogen enters the secondary ejector (22) through the hydrogen inlet pipeline (101), the valve core (104), and the second channel (103) in sequence.

3. The fuel cell system according to claim 2, wherein: The multifunctional valve (1) further comprises a first end plug (105) and a second end plug (106), wherein the first end plug (105) is connected to one end of the valve core (104) via a first return spring (107), and the second end plug (106) is connected to the other end of the valve core (104) via a second return spring (108), and the second end plug (106) is also connected to the electromagnetic valve seat (109); When the multifunctional valve (1) is powered off, the first return spring (107) and the second return spring (108) fix the valve core (104) in a third position. When the valve core (104) is in the third position, neither the first inlet (R1) nor the second inlet (R2) is connected to the hydrogen inlet pipeline (101), and neither the first outlet (C1) nor the second outlet (C2) is connected to the first channel (102) / second channel (103).

4. The fuel cell system according to claim 2, wherein: A pressure sensor (3) is also provided between the ejector assembly (2) and the fuel cell stack (5), and the controller (4) is connected to the pressure sensor (3) to obtain the pressure value collected by the pressure sensor (3).

5. The fuel cell system according to claim 2, wherein: The multifunctional valve (1) further comprises a valve housing (110), wherein the valve core (104) is built into the valve housing (110), and the valve housing (110) comprises a third inlet (R3), a third outlet (C3), and a fourth outlet (C4); The third inlet (R3) is connected to the hydrogen inlet pipeline (101), so that hydrogen enters the valve core (104) through the hydrogen inlet pipeline (101), the third inlet (R3), the first inlet (R1) / the second inlet (R2) in sequence; The third outlet (C3) is connected to the first channel (102), and the fourth outlet (C4) is connected to the second channel (103), so that the hydrogen in the valve core (104) enters the first-stage ejector (21) through the first outlet (C1), the third outlet (C3), and the first channel (102) in sequence; or enters the second-stage ejector (22) through the second outlet (C2), the fourth outlet (C4), and the second channel (103) in sequence.

6. The fuel cell system according to claim 5, characterized in that The outer side of the hydrogen inlet pipeline (101) is sealedly connected to the outer side of the valve housing (110) via a sealing assembly; The outer side of the first channel (102) is sealed and connected to the outer side of the valve housing (110) through a sealing assembly, and the outer side of the second channel (103) is sealed and connected to the outer side of the valve housing (110) through a sealing assembly.

7. A fuel cell vehicle, characterized in that: include: The fuel cell system according to any one of claims 1 to 6.

8. A method for controlling a fuel cell system, characterized in that: A fuel cell system according to any one of claims 1 to 6, comprising: In response to a fuel cell system startup instruction or a first-stage ejector connection instruction, controlling the valve core of the multifunctional valve to move to a first position to open the first channel, allowing hydrogen to enter the first-stage ejector through the first channel, and controlling the valve core to move to adjust the hydrogen flow rate of the first channel; In response to the secondary ejector connection instruction, the valve core is controlled to move to the second position to open the second channel, so that hydrogen enters the secondary ejector through the second channel, and the valve core is controlled to move to adjust the hydrogen flow rate of the second channel.

9. The fuel cell system control method according to claim 8, characterized in that: Controlling the valve core to move to adjust the hydrogen flow rate of the first channel / the second channel includes: Obtain the pressure value collected by the pressure sensor and the target pressure value corresponding to the current working condition; When the pressure value is greater than the target pressure value of the working condition, controlling the valve core to move to reduce the hydrogen flow rate of the first channel / the second channel until the pressure value is equal to the target pressure value of the working condition; When the pressure value is less than the target pressure value of the working condition, controlling the valve core to move to increase the hydrogen flow rate of the first channel / the second channel until the pressure value is equal to the target pressure value of the working condition; When the pressure value is equal to the working condition target pressure value, the valve core is controlled to maintain the current position.

10. A controller for a fuel cell system, characterized in that: include: a processor, and a memory communicatively connected to the processor; The memory is used to store computer-executable instructions; The processor is configured to execute the computer-executable instructions stored in the memory, so that the processor executes the fuel cell system control method according to claim 8 or 9.

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