Fuel cell system, method, controller, and vehicle

Abstract

This invention relates to a fuel cell system, method, controller, and vehicle, comprising: a multi-functional valve, an ejector assembly, a fuel cell stack, and a controller; the multi-functional valve includes a hydrogen inlet line, a first channel, a second channel, and a valve core; the ejector assembly includes a primary ejector and a secondary ejector, the inlet of the primary ejector being connected to the first channel, the inlet of the secondary ejector being connected to the second channel, and the outlets of the primary and secondary ejectors being respectively connected to the fuel cell stack; the controller is electrically connected to the multi-functional valve and is used to control the movement of the valve core to control the opening / closing of the first and second channels, and the hydrogen flow rate of the first / second channels. This invention reduces the cost and size of the fuel cell system.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and more particularly to a fuel cell system, method, controller, and vehicle. Background Technology

[0002] Hydrogen fuel cell vehicles are a type of new energy vehicle, hailed as the cleanest means of transportation in the 21st century. The hydrogen supply system is an important part of the hydrogen fuel cell, and it is necessary to adjust the pressure and flow of hydrogen entering the fuel cell stack according to the operating conditions to ensure the stack's working efficiency.

[0003] In related technologies, hydrogen pressure and flow rate are typically regulated using an ejector and a combination of valves preceding the ejector. To improve efficiency, two-stage ejectors with different ejection ratios can be used to adapt to more fuel cell stack operating conditions. Therefore, to achieve switching between the first-stage and second-stage ejectors and to control the hydrogen pressure and flow rate entering the ejector, multiple sets of valves need to be installed in the fuel cell system, such as hydrogen shut-off valves, hydrogen proportioning valves, and hydrogen switching valves.

[0004] However, the use of multiple valves not only increases the cost of the fuel cell system, but also requires extra space for arrangement, increasing the size of the fuel cell system. Summary of the Invention

[0005] This invention provides a fuel cell system, method, controller, and vehicle that can reduce the cost and size of the fuel cell system.

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

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

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

[0009] 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).

[0010] In one possible implementation, 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:

[0011] 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 connected to the hydrogen inlet pipe (101), and the second outlet (C2) is connected to the first channel (102), so that hydrogen enters the first-stage ejector (21) in sequence through the hydrogen inlet pipe (101), the valve core (104), and the first channel (102).

[0012] 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 pipe (101), and the first outlet (C1) is connected to the second channel (103), so that hydrogen enters the secondary ejector (22) in sequence through the hydrogen inlet pipe (101), the valve core (104), and the second channel (103).

[0013] In one possible implementation, the multifunctional valve (1) further includes 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 a solenoid valve seat (109);

[0014] When the multi-functional valve (1) is de-energized, 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, 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) / the second channel (103).

[0015] In one possible implementation, 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).

[0016] In one possible implementation, the multifunctional valve (1) further includes 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);

[0017] The third inlet (R3) is connected to the hydrogen inlet pipeline (101) so that hydrogen enters the valve core (104) sequentially through the hydrogen inlet pipeline (101), the third inlet (R3), and the first inlet (R1) / second inlet (R2);

[0018] 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) in sequence through the first outlet (C1), the third outlet (C3), and the first channel (102); or enters the second-stage ejector (22) in sequence through the second outlet (C2), the fourth outlet (C4), and the second channel (103).

[0019] In one possible implementation, the outer side of the hydrogen inlet pipe (101) is sealed to the outer side of the valve housing (110) via a sealing assembly;

[0020] The outer side of the first channel (102) is sealed to the outer side of the valve body (110) through a sealing assembly, and the outer side of the second channel (103) is sealed to the outer side of the valve body (110) through a sealing assembly.

[0021] In a second aspect, embodiments of the present invention provide a fuel cell vehicle, comprising: a fuel cell system as described in any one of the first aspects.

[0022] Thirdly, embodiments of the present invention provide a control method for a fuel cell system, applied to a fuel cell system as described in any one of the first aspects, comprising:

[0023] In response to a fuel cell system start command or a first-stage ejector connection command, the valve core of the multi-functional valve is controlled to move to a first position to open the first channel, allowing hydrogen to enter the first-stage ejector through the first channel, and the valve core is controlled to move to adjust the hydrogen flow rate of the first channel.

[0024] In response to the secondary ejector connection command, the valve core is controlled to move to the second position to open the second channel, allowing hydrogen to enter the secondary ejector through the second channel, and the valve core is controlled to move to adjust the hydrogen flow rate in the second channel.

[0025] In one possible implementation, controlling the valve core to move to adjust the hydrogen flow rate in the first / second channel includes:

[0026] Acquire the pressure value collected by the pressure sensor, as well as the target pressure value corresponding to the current operating condition;

[0027] When the pressure value is greater than the target pressure value, the valve core is controlled to move to reduce the hydrogen flow rate in the first / second channel until the pressure value is equal to the target pressure value.

[0028] When the pressure value is less than the target pressure value, the valve core is controlled to move to increase the hydrogen flow rate of the first channel / second channel until the pressure value is equal to the target pressure value.

[0029] When the pressure value is equal to the target pressure value under the operating condition, the valve core is controlled to maintain its current position.

[0030] Fourthly, embodiments of the present invention provide a controller for a fuel cell system, comprising:

[0031] The processor, and the memory that is communicatively connected to the processor;

[0032] Memory is used to store instructions that the computer executes;

[0033] The processor is configured to execute computer execution instructions stored in memory, causing the processor to perform the third aspect and / or various possible implementations of the third aspect as described above.

[0034] Fifthly, embodiments of the present invention provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the third aspect and / or various possible implementations of the third aspect described above.

[0035] In a sixth aspect, embodiments of the present invention provide a computer program product, including a computer program, which, when executed by a processor, is used to implement the third aspect and / or various possible implementations of the third aspect described above.

[0036] The beneficial effects of this invention are as follows: The multifunctional valve can include a hydrogen inlet pipe, a first channel, a second channel, and a valve core. Hydrogen is introduced through the hydrogen inlet pipe, flows into the primary ejector through the first channel, and flows into the secondary ejector through the second channel. The controller is electrically connected to the multifunctional valve and can control the opening / closing of the first and second channels by controlling the movement of the valve core, thus switching between the primary and secondary ejectors. The controller can also control the hydrogen flow rate and pressure in the first / second channel by controlling the movement of the valve core. With this configuration, the multifunctional valve integrates the functions of multiple valves, allowing for the switching between the primary and secondary ejectors, as well as the control of hydrogen flow rate and pressure in the channels, all with a single valve. This effectively reduces the cost of the fuel cell system and eliminates the need for additional space, thus reducing the overall size of the fuel cell system. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a fuel cell system according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of a multifunctional valve when it is closed according to an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the structure of a multifunctional valve when the first channel is opened according to an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the structure of a multifunctional valve when the second channel is opened according to an embodiment of the present invention;

[0041] Figure 5 This is a flowchart of a control method for a fuel cell system according to an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of the control process of a fuel cell system according to an embodiment of the present invention;

[0043] Figure 7 This is a schematic diagram of the controller of a fuel cell system according to an embodiment of the present invention.

[0044] Reference numerals: 1. Multifunctional valve; 101. Hydrogen inlet pipeline; 102. First channel; 103. Second channel; 104. Valve core; 105. First end plug; 106. Second end plug; 107. First return spring; 108. Second return spring; 109. Solenoid valve seat; 110. Valve body; 2. Ejector assembly; 21. First-stage ejector; 22. Second-stage ejector; 3. Pressure sensor; 4. Controller; 5. Fuel cell stack; R1. First inlet; R2. Second inlet; R3. Third inlet; C1. First outlet; C2. Second outlet; C3. Third outlet; C4. Fourth outlet. Detailed Implementation

[0045] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0046] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] It should be noted that in the embodiments of the present invention, certain software, components, models and other existing solutions in the industry may be mentioned. These should be regarded as exemplary and are only intended to illustrate the feasibility of implementing the technical solution of the present invention. However, they do not mean that the applicant has used or necessarily used the solution.

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

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

[0050] First, the terms used in this invention will be explained:

[0051] The ejector, a key component in a fuel cell system, is responsible for the anode hydrogen circulation. It utilizes the energy of unreacted hydrogen (high-pressure working fluid) at the stack outlet to draw in fresh hydrogen (low-pressure ejector fluid), mix it, and then reintroduce it into the anode inlet of the stack. This improves hydrogen utilization and maintains the hydrothermal balance within the anode channel.

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

[0053] Based on the technical problem raised, the inventive concept of this invention is: how to provide a fuel cell solution that can reduce the cost and size of the fuel cell system.

[0054] This invention provides a fuel cell system, method, controller, and vehicle. A multi-functional valve includes a hydrogen inlet pipe, a first channel, a second channel, and a valve core. Hydrogen is introduced through the hydrogen inlet pipe, flows into a primary ejector through the first channel, and flows into a secondary ejector through the second channel. The controller is electrically connected to the multi-functional valve and can control the opening / closing of the first and second channels by moving the valve core, thus switching between the primary and secondary ejectors. The controller can also control the hydrogen flow rate and pressure in the first / second channel by moving the valve core. With this configuration, the multi-functional valve integrates the functions of multiple valves, allowing for switching between the primary and secondary ejectors and control of hydrogen flow rate and pressure in the channels using a single valve. This effectively reduces the cost of the fuel cell system and eliminates the need for additional space, thus reducing the overall size of the fuel cell system.

[0055] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems are described in detail below with specific embodiments. These 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 invention will now be described with reference to the accompanying drawings.

[0056] Figure 1 This is a schematic diagram of the structure of a fuel cell system according to an embodiment of the present invention, as shown below. Figure 1 As shown, the fuel cell system includes: a multi-functional valve (1), an ejector assembly (2), a fuel cell stack (5), and a controller (4);

[0057] Figure 2 This is a schematic diagram of the structure of a multifunctional valve when closed according to an embodiment of the present invention, as shown below. Figure 2As shown, the multi-functional valve (1) includes a hydrogen inlet pipe (101), a first channel (102), a second channel (103), and a valve core (104);

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

[0059] The controller (4) is electrically connected to the multi-function valve (1) 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) / second channel (103).

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

[0061] In this embodiment, the hydrogen inlet pipe (101), the first channel (102), and the second channel (103) can be integrally set with the valve body of the multi-functional valve (1), or they can be connected to the valve body through a connector.

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

[0063] In this embodiment, the activation of the primary ejector (21) and the secondary ejector (22) can be determined according to the specific operating conditions. The vehicle controller or body domain controller can collect relevant parameters after the vehicle starts and determine the operating conditions accordingly. The ejector to be activated can be determined based on the operating 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) to generate electricity through an electrochemical reaction.

[0065] In this embodiment, the controller (4) may be a fuel cell controller assembly (FCCU). The controller (4) may be connected to the multi-functional valve (1) via a wiring harness to control the movement of the valve core (104).

[0066] In this embodiment, when the vehicle starts or the operating conditions change, the vehicle controller or body domain controller can send a fuel cell start command or a first-stage ejector connection command / second-stage ejector connection command to the FCCU. After receiving the command, the FCCU will energize the multi-function valve (1) and control the valve core (104) to move to open the first channel (102) / second channel (103), thereby opening the first-stage ejector (21) / second-stage ejector (22) for hydrogen transfer.

[0067] In this embodiment, when the first channel (102) is opened, the first channel (102) is connected to the valve core (104), and the valve core (104) is also connected to the hydrogen inlet pipeline (101). Hydrogen enters the first-stage ejector (21) through the hydrogen inlet pipeline (101), the valve core (104), and the first channel (102).

[0068] In this embodiment, when the second channel (103) is opened, the second channel (103) is connected to the valve core (104), and the valve core (104) is also connected to the hydrogen inlet pipeline (101). Hydrogen enters the secondary ejector (22) through the hydrogen inlet pipeline (101), the valve core (104), and the second channel (103).

[0069] In this embodiment, after the FCCU opens the first channel (102) / second channel (103), it can also control the valve core (104) to move slightly in the open position to adjust the hydrogen flow area in the channel, thereby adjusting the hydrogen flow rate and pressure.

[0070] In this embodiment, the multi-functional valve may include a hydrogen inlet pipe, a first channel, a second channel, and a valve core. Hydrogen is introduced through the hydrogen inlet pipe, flows into the primary ejector through the first channel, and flows into the secondary ejector through the second channel. A controller is electrically connected to the multi-functional valve and can control the opening / closing of the first and second channels by moving the valve core, thus switching between the primary and secondary ejectors. The controller can also control the hydrogen flow rate and pressure in the first / second channel by moving the valve core. With this configuration, the multi-functional valve integrates the functions of multiple valves, allowing for switching between the primary and secondary ejectors and control of hydrogen flow rate and pressure in the channels using a single valve. This effectively reduces the cost of the fuel cell system and eliminates the need for additional space, thus reducing the overall size of the fuel cell system.

[0071] In one possible implementation, such 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). The valve core (104) is configured as follows:

[0072] Figure 3 This is a schematic diagram of the structure of a multifunctional valve when the first channel is opened according to an embodiment of the present invention. Figure 3 for Figure 2 The valve core (104) is moved to the left, as shown in the figure. Figure 3 As shown, 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 connected to the hydrogen inlet pipe (101), and the second outlet (C2) is connected to the first channel (102), so that hydrogen gas sequentially passes through the hydrogen inlet pipe (101), the valve core (104), and the first channel (102) into the first-stage ejector (21). Figure 3 The middle arrow indicates the hydrogen flow path.

[0073] Figure 4 This is a schematic diagram of the structure of a multifunctional valve when the second channel is opened according to an embodiment of the present invention. Figure 4 for Figure 2 / Figure 3 The valve core (104) is obtained by moving it to the right, as shown in the example. Figure 4 As shown, 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 connected to the hydrogen inlet pipe (101), and the first outlet (C1) is connected to the second channel (103), so that hydrogen gas enters the secondary ejector (22) sequentially through the hydrogen inlet pipe (101), the valve core (104), and the second channel (103). Figure 4 The middle arrow indicates the hydrogen flow path.

[0074] In this embodiment, such as Figure 2 / Figure 3 / Figure 4 As shown, the valve core (104) has two interconnected cross-shaped channels inside, 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, the specific second 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 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, as Figure 2 As shown, when the multi-functional valve (1) is closed, 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) / the second channel (103). There is no hydrogen input to either the primary ejector (21) or the secondary ejector (22).

[0078] In this embodiment, when the primary ejector is activated, the controller can move the valve core to the first position to open the first channel, allowing hydrogen to be transmitted to the primary ejector through the first channel. When the secondary ejector is activated, the controller can move the valve core to the second position to open the second channel, allowing hydrogen to be transmitted to the secondary ejector through the second channel.

[0079] In one possible implementation, such as Figure 2 As shown, the multi-functional valve (1) also includes a first end plug (105) and a second end plug (106). The first end plug (105) is connected to one end of the valve core (104) through a first return spring (107), and the second end plug (106) is connected to the other end of the valve core (104) through a second return spring (108). The second end plug (106) is also connected to the solenoid valve seat (109).

[0080] When the multi-functional valve (1) is de-energized, 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, 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) / the second channel (103).

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

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

[0083] In this embodiment, the solenoid valve seat (109) may contain an electromagnetic actuator (such as a proportional electromagnet or a stepper motor) that drives the valve core (104) to move axially.

[0084] In this embodiment, the third position can be the initial position of the valve core (104). When the fuel cell stack is shut down or the fuel cell system / multifunctional valve is de-energized, the valve core (104) will return to the third position. At this time, the first channel (102) and the second channel (103) are both closed to ensure that hydrogen does not enter the ejector assembly (2).

[0085] In this embodiment, the specific third 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 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) / the second channel (103).

[0086] In this embodiment, the valve core can be provided with two inlet and two outlet ports, which cooperate with the hydrogen inlet pipeline, the first channel, and the second channel for hydrogen transmission. When the multi-functional valve is energized, the controller can drive the valve core to move through the solenoid valve seat to switch between the first channel and the second channel and adjust the hydrogen flow rate. When the multi-functional valve is de-energized, the first return spring and the second return spring can fix the valve core in the third position, so that both the first channel and the second channel are closed.

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

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

[0089] In this embodiment, the controller (4) can be connected to the pressure sensor (3) via a wiring harness to obtain the pressure value at the outlet of the ejector assembly (2) collected by the pressure sensor (3).

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

[0091] In one possible implementation, such as Figure 2As shown, the multi-functional valve (1) may also include a valve body (110), the valve body (110) having a built-in valve core (104), the valve body (110) including a third inlet (R3), a third outlet (C3) and a fourth outlet (C4);

[0092] The third inlet (R3) is connected to the hydrogen inlet pipeline (101) so that hydrogen enters the valve core (104) sequentially through the hydrogen inlet pipeline (101), the third inlet (R3), and the first inlet (R1) / second inlet (R2);

[0093] 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 ejector (21) in sequence through the first outlet (C1), the third outlet (C3), and the first channel (102); or enters the second ejector (22) in sequence through the second outlet (C2), the fourth outlet (C4), and the second channel (103).

[0094] In this embodiment, the connection method between the third inlet (R3) and the hydrogen inlet pipeline (101), the connection method between the third outlet (C3) and the first channel (102), and the connection method between the fourth outlet (C4) and the second channel (103) are not limited in any way, as long as a firm connection can be ensured 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 body (110) can also be integrally formed with the hydrogen inlet pipe (101), the first channel (102), and the second channel (103).

[0096] In this embodiment, the valve body can be provided with ports at positions corresponding to the hydrogen inlet pipe, the first channel, and the second channel, so that the valve body, the valve core, the first channel, and the second channel cooperate to form two hydrogen transmission paths. The valve core can move inside the valve body to switch between the two hydrogen transmission paths.

[0097] In one possible implementation, the outer side of the hydrogen inlet line (101) is sealed to the outer side of the valve housing (110) via a sealing assembly;

[0098] The outer side of the first channel (102) is sealed to the outer side of the valve body (110) through a sealing assembly, and the outer side of the second channel (103) is sealed to the outer side of the valve body (110) through a sealing assembly.

[0099] In this embodiment, the type of sealing component can be flexibly set by those skilled in the art according to actual conditions, and no restrictions are made here. For example, the sealing component can be an O-ring, etc., as long as the sealing component can prevent hydrogen from leaking out from the connection.

[0100] In this embodiment, sealing components can be installed on the outside of the hydrogen inlet pipeline, the first channel, the second channel and the valve body to prevent hydrogen leakage.

[0101] Figure 5 This is a flowchart of a control method for a fuel cell system according to an embodiment of the present invention. In this embodiment, the execution subject is... Figure 1 The FCCU (Fuel Cell Control Unit) of the fuel cell system describes the control method of the fuel cell system. For example... Figure 5 As shown, the control method for this fuel cell system may include the following steps:

[0102] S501: In response to a fuel cell system start command or a first-stage ejector connection command, control the valve core of the multi-function valve to move to the first position to open the first channel, allowing hydrogen to enter the first-stage ejector through the first channel, and control the valve core to move to adjust the hydrogen flow rate of the first channel.

[0103] In this embodiment, after the vehicle starts, the vehicle controller or body domain controller sends a fuel cell system start command to the FCCU to start the fuel cell system and wake up the FCCU. The FCCU then controls the movement of the valve core of the multi-function valve (by...). Figures 2 to 3 The valve core moves to the left to the first position to open the first channel.

[0104] In this embodiment, during operation, the vehicle controller or body domain controller will also collect relevant parameters and determine the operating conditions accordingly. Based on the operating load / power, the ejector to be activated will be determined. If it is determined at a certain moment that the first-level ejector needs to be activated, the vehicle controller or body domain controller will send a first-level ejector connection command to the FCCU. The FCCU will control the valve core of the multi-function valve to move to the first position to open the first channel.

[0105] In this 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 rate of the first channel.

[0106] S502: In response to the secondary ejector connection command, the control valve core moves to the second position to open the second channel, allowing hydrogen to enter the secondary ejector through the second channel, and the control valve core moves to adjust the hydrogen flow rate in the second channel.

[0107] In this embodiment, during operation, the vehicle controller or body domain controller will also collect relevant parameters and determine the operating conditions accordingly. Based on the operating load / power, it will determine which ejector to activate. If it is determined at a certain moment that the secondary ejector needs to be activated, the vehicle controller or body domain controller will send a secondary ejector connection command to the FCCU. The FCCU will then control the movement of the valve core of the multi-functional valve (by...). Figures 3 to 4 The valve core moves to the right to the second position to open the second channel.

[0108] In this embodiment, after the second channel is opened, the FCCU can control the valve core to move (left / right) near the second position to adjust the hydrogen flow rate of the second channel.

[0109] In this embodiment, the multi-functional valve may include a hydrogen inlet pipe, a first channel, a second channel, and a valve core. Hydrogen is introduced through the hydrogen inlet pipe, flows into the primary ejector through the first channel, and flows into the secondary ejector through the second channel. A controller is electrically connected to the multi-functional valve and can control the opening / closing of the first and second channels by moving the valve core, thus switching between the primary and secondary ejectors. The controller can also control the hydrogen flow rate and pressure in the first / second channel by moving the valve core. With this configuration, the multi-functional valve integrates the functions of multiple valves, allowing for switching between the primary and secondary ejectors and control of hydrogen flow rate and pressure in the channels using a single valve. This effectively reduces the cost of the fuel cell system and eliminates the need for additional space, thus reducing the overall size of the fuel cell system.

[0110] In one possible implementation, the movement of the control valve core described above to adjust the hydrogen flow rate in the first / second channel may include:

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

[0112] S12: When the pressure value is greater than the target pressure value, the control valve core moves to reduce the hydrogen flow rate in the first / second channel until the pressure value is equal to the target pressure value.

[0113] S13: When the pressure value is less than the target pressure value, the control valve core moves to increase the hydrogen flow rate in the first / second channel until the pressure value is equal to the target pressure value.

[0114] S14: When the pressure value is equal to the target pressure value of the operating condition, the control valve core maintains its current position.

[0115] In this embodiment, the controller can obtain the pressure value at the outlet of the ejector assembly through a pressure sensor installed on the main pipeline between the outlet of the ejector assembly and the inlet of the fuel cell stack.

[0116] In this embodiment, different operating conditions can correspond to different target pressure values. Those skilled in the art can pre-calibrate the fuel cell system to obtain the ejector and target pressure values ​​corresponding to the fuel cell system under different operating conditions. The ejector corresponding to the fuel cell system under different operating conditions is written into the vehicle controller or body domain controller, and the target pressure values ​​corresponding to the fuel cell system under different operating conditions are written into the FCCU.

[0117] For example, under certain operating conditions A, the fuel cell system uses the first channel and the first-stage ejector for hydrogen transfer. At time T1, the pressure value at the outlet of the ejector assembly collected by the pressure sensor is P. 10 The target pressure value corresponding to operating condition A is P. 目标1 Then the controller will compare P. 10 P 目标1 The size is determined and judged.

[0118] If P 10 >P 目标1 If the pressure at the ejector assembly outlet is greater than the target pressure, the FCCU needs to control the valve core to move, reducing the hydrogen flow area in the first channel, decreasing the hydrogen flow rate in the first channel, and lowering the ejector assembly outlet pressure P. 10 ;

[0119] If P 10 <P 目标1 If the pressure at the ejector assembly outlet is lower than the target pressure, it is necessary to move the valve core via the FCCU to increase the hydrogen flow area and flow rate in the first channel, thereby increasing the ejector assembly outlet pressure P. 10 ;

[0120] If P 10 =P 目标1 This indicates that the pressure at the ejector assembly outlet is equal to the target pressure under operating conditions. Therefore, the FCCU needs to control the valve core to maintain its current position and keep the ejector assembly outlet pressure P. 10 .

[0121] For example, under certain operating conditions B, the fuel cell system uses a second channel and a second-stage ejector for hydrogen transfer. At time T2, the pressure value at the outlet of the ejector assembly collected by the pressure sensor is P. 20 The target pressure value corresponding to operating condition A is P. 目标2 Then the controller will compare P.20 P 目标2 The size is determined and judged.

[0122] If P 20 >P 目标2 If the pressure at the ejector assembly outlet is greater than the target pressure, the FCCU needs to control the valve core to move, reducing the hydrogen flow area in the second channel, decreasing the hydrogen flow rate in the second channel, and lowering the ejector assembly outlet pressure P. 20 ;

[0123] If P 20 <P 目标2 If the pressure at the ejector assembly outlet is lower than the target pressure, it is necessary to move the valve core via the FCCU to increase the hydrogen flow area in the second channel, increase the hydrogen flow rate in the second channel, and increase the pressure P at the ejector assembly outlet. 20 ;

[0124] If P 20 =P 目标2 This indicates that the pressure at the ejector assembly outlet is equal to the target pressure under operating conditions. Therefore, the FCCU needs to control the valve core to maintain its current position and keep the ejector assembly outlet pressure P. 20 .

[0125] In this embodiment, when the fuel cell stack is shut down, the FCCU can control the valve core to return to the initial position (third position) and simultaneously close the first and second channels. After the fuel cell system / multifunction valve is de-energized, the valve core will also remain in the initial position under the combined action of the first and second return springs, ensuring 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, so as to adjust the hydrogen flow rate and pressure in the channel, making the pressure value equal to the target pressure value, thus using different working conditions and improving working efficiency.

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

[0128] In one specific embodiment, the fuel cell system includes a multi-functional valve (1), an ejector assembly (2), a fuel cell stack (5), a controller (4), and a pressure sensor (3). The pressure sensor (3) is located between the ejector assembly (2) and the fuel cell stack (5). The controller (4) is connected to the multi-functional valve (1) and the pressure sensor (3) respectively via wiring harnesses.

[0129] The multi-functional valve (1) includes a hydrogen inlet pipe (101), a first channel (102), a second channel (103), a valve core (104), a first end plug (105), a second end plug (106), and a valve body (110). The valve body (110) houses the valve core (104). The first end plug (105) is connected to one end of the valve core (104) via a first return spring (107). The second end plug (106) is connected to the other end of the valve core (104) via a second return spring (108). The second end plug (106) is also connected to a solenoid valve seat (109).

[0130] The ejector assembly (2) includes a primary ejector (21) and a secondary ejector (22). The inlet of the primary ejector (21) is connected to the first channel (102), the inlet of the secondary ejector (22) is connected to the second channel (103), and the outlets of the primary ejector (21) and the secondary ejector (22) are respectively connected to the fuel cell stack (5).

[0131] The valve core (104) includes a first inlet (R1), a second inlet (R2), a first outlet (C1), and a second outlet (C2). The valve body (110) includes 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) sequentially through the hydrogen inlet pipeline (101), the third inlet (R3), and the first inlet (R1) / second inlet (R2). 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) sequentially through the first outlet (C1), the third outlet (C3), and the first channel (102); or enters the second-stage ejector (22) sequentially through the second outlet (C2), the fourth outlet (C4), and the second channel (103).

[0132] The outer side of the hydrogen inlet pipe (101) is sealed to the outer side of the valve body (110) through a sealing assembly; the outer side of the first channel (102) is sealed to the outer side of the valve body (110) through a sealing assembly, and the outer side of the second channel (103) is sealed to the outer side of the valve body (110) through a sealing assembly.

[0133] Figure 6 This is a schematic diagram of the control process of a fuel cell system according to an embodiment of the present invention, as shown below. Figure 6 As shown, after the vehicle is started, the vehicle controller or body domain controller sends a fuel cell system start command to the controller (4) to start the fuel cell system and wake up the controller (4). The controller (4) controls the valve core (104) of the multi-function 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 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 the hydrogen enters the first-stage ejector (21) in sequence through the hydrogen inlet pipeline (101), the valve core (104), and the first channel (102).

[0135] The controller (4) acquires the pressure value P at time T1 from the pressure sensor (3) at the outlet of the ejector assembly (2). 10 The target pressure value corresponding to the current operating condition is P. 目标1 Then the controller (4) will compare P. 10 P 目标1 The size is determined, and the judgment is made:

[0136] If P 10 >P 目标1 If the pressure value at the outlet of the ejector assembly (2) is greater than the target pressure value under operating conditions, then the controller (4) controls the valve core (104) to move, reducing the hydrogen flow area of ​​the first channel (102), reducing the hydrogen flow rate of the first channel (102), and lowering the pressure value P at the outlet of the ejector assembly (2). 10 ;

[0137] If P 10 <P 目标1 If the pressure value at the outlet of the ejector assembly (2) is less than the target pressure value under operating conditions, the controller (4) will control the valve core (104) to move, increasing the hydrogen flow area of ​​the first channel (102), increasing the hydrogen flow rate of the first channel (102), and increasing the pressure value P at the outlet of the ejector assembly (2). 10 ;

[0138] If P 10 =P 目标1 If the pressure value at the outlet of the ejector assembly (2) is equal to the target pressure value under operating conditions, then the controller (4) controls the valve core (104) to maintain its current position, thus maintaining the pressure value P at the outlet of the ejector assembly (2). 10 .

[0139] At a certain moment, the working condition changes to a high-load condition. The vehicle controller or body domain controller sends a secondary ejector connection command to the controller (4). The controller (4) controls the valve core (104) of the multi-function 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 opened and the first channel (102) is closed. The second inlet (R2) is connected to the hydrogen inlet pipe (101), and the first outlet (C1) is connected to the second channel (103), so that the hydrogen enters the secondary ejector (22) in sequence through the hydrogen inlet pipe (101), the valve core (104), and the second channel (103).

[0141] The controller (4) acquires the pressure value P at time T2 from the pressure sensor (3) at the outlet of the ejector assembly (2). 20 The target pressure value for this operating condition is P. 目标2 Then the controller (4) will compare P. 20 P 目标2 The size is determined, and the judgment is made:

[0142] If P 20 >P 目标2 If the pressure value at the outlet of the ejector assembly (2) is greater than the target pressure value under operating conditions, the controller (4) will control the valve core (104) to move, reducing the hydrogen flow area of ​​the second channel (103), reducing the hydrogen flow rate of the second channel (103), and lowering the pressure value P at the outlet of the ejector assembly (2). 20 ;

[0143] If P 20 <P 目标2 If the pressure value at the outlet of the ejector assembly (2) is less than the target pressure value under operating conditions, the controller (4) will control the valve core (104) to move, increasing the hydrogen flow area of ​​the second channel (103), increasing the hydrogen flow rate of the second channel (103), and increasing the pressure value P at the outlet of the ejector assembly (2). 20 ;

[0144] If P 20 =P 目标2 If the pressure value at the outlet of the ejector assembly (2) is equal to the target pressure value under operating conditions, then the controller (4) controls the valve core (104) to maintain its current position, thus maintaining the pressure value P at the outlet of the ejector assembly (2). 20 .

[0145] At a certain moment, the fuel cell stack (5) is shut down, and 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, 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) / the second channel (103).

[0146] Figure 7This is a schematic diagram of the controller of a fuel cell system according to an embodiment of the present invention, as shown below. 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-described method embodiments.

[0147] In the controller of the aforementioned fuel cell system, the memory 702 and the processor 701 are electrically connected directly or indirectly to enable 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 a bus connection. The memory 702 stores computer-executable instructions for implementing data access control methods, including at least one software functional 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, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory 702 stores programs, which are executed by the processor 701 upon receiving execution instructions. Furthermore, the software programs and modules within the memory 702 may 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 can communicate with various hardware or software components to provide an operating environment for other software components.

[0149] Processor 701 can be an integrated circuit chip with signal processing capabilities. The aforementioned processor 701 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor.

[0150] An embodiment of the present invention also provides a fuel cell vehicle, comprising: as shown in the figure Figure 1 The fuel cell system shown includes, as described above, a fuel cell system comprising, Figure 2 / Figure 3 / Figure 4 The multi-functional valve shown, and Figure 7 The controller of the fuel cell system shown.

[0151] An embodiment of the present invention also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the steps of the various method embodiments of the present invention.

[0152] An embodiment of the present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the various method embodiments of the present invention.

[0153] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0154] It should be further noted that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0155] It should be understood that the above-described device embodiments are merely illustrative, and the device of the present invention can also be implemented in other ways. For example, the division of units / modules in the above embodiments is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units, modules, or components may be combined, or integrated into another system, or some features may be ignored or not executed.

[0156] Furthermore, unless otherwise specified, the functional units / modules in the various embodiments of the present invention can be integrated into one unit / module, or each unit / module can exist physically separately, or two or more units / modules can be integrated together. The integrated units / modules described above can be implemented in hardware or as software program modules.

[0157] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0158] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the appended claims.

[0159] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention 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) includes a hydrogen inlet pipe (101), a first channel (102), a second channel (103), and a valve core (104). The ejector assembly (2) includes a primary ejector (21) and a secondary ejector (22). The inlet of the primary ejector (21) is connected to the first channel (102), the inlet of the secondary ejector (22) is connected to the second channel (103), and the outlets of the primary ejector (21) and the secondary ejector (22) are respectively connected to the fuel cell stack (5). The controller (4) is electrically connected to the multi-functional valve (1) and is used to control 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 rate of the first channel (102) / the second channel (103); 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 open and the second channel (103) is closed. The first inlet (R1) is connected to the hydrogen inlet pipe (101), and the second outlet (C2) is connected to the first channel (102), so that hydrogen enters the first-stage ejector (21) in sequence through the hydrogen inlet pipe (101), the valve core (104), and the first channel (102). 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 pipe (101), and the first outlet (C1) is connected to the second channel (103), so that hydrogen enters the secondary ejector (22) in sequence through the hydrogen inlet pipe (101), the valve core (104), and the second channel (103). The multifunctional valve (1) further includes a first end plug (105) and a second end plug (106). The first end plug (105) is connected to one end of the valve core (104) through a first return spring (107), and the second end plug (106) is connected to the other end of the valve core (104) through a second return spring (108). The second end plug (106) is also connected to the solenoid valve seat (109). When the multifunctional valve (1) is de-energized, 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, 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) / the second channel (103).

2. The fuel cell system according to claim 1, characterized in that, A pressure sensor (3) is also provided between the ejector assembly (2) and the fuel cell stack (5). The controller (4) is connected to the pressure sensor (3) to obtain the pressure value collected by the pressure sensor (3).

3. The fuel cell system according to claim 1, characterized in that, The multi-functional valve (1) also includes a valve body (110), the valve body (110) housing the valve core (104), and the valve body (110) including a third inlet (R3), a third outlet (C3) and a fourth outlet (C4). The third inlet (R3) is connected to the hydrogen inlet pipe (101) so that hydrogen enters the valve core (104) sequentially through the hydrogen inlet pipe (101), the third inlet (R3), the first inlet (R1) / the second inlet (R2). 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 ejector (21) sequentially through the first outlet (C1), the third outlet (C3), and the first channel (102); or enters the second ejector (22) sequentially through the second outlet (C2), the fourth outlet (C4), and the second channel (103).

4. The fuel cell system according to claim 3, characterized in that, The outer side of the hydrogen inlet pipe (101) is sealed to the outer side of the valve body (110) through a sealing assembly; The outer side of the first channel (102) is sealed to the outer side of the valve body (110) through a sealing assembly, and the outer side of the second channel (103) is sealed to the outer side of the valve body (110) through a sealing assembly.

5. A fuel cell vehicle, characterized in that, include: The fuel cell system as described in any one of claims 1-4.

6. A control method for a fuel cell system, characterized in that, Applied to a fuel cell system as described in any one of claims 1-4, comprising: In response to a fuel cell system start command or a first-stage ejector connection command, the valve core of the multi-functional valve is controlled to move to a first position to open the first channel, allowing hydrogen to enter the first-stage ejector through the first channel, and the valve core is controlled to move to adjust the hydrogen flow rate of the first channel. In response to the secondary ejector connection command, the valve core is controlled to move to the second position to open the second channel, allowing hydrogen to enter the secondary ejector through the second channel, and the valve core is controlled to move to adjust the hydrogen flow rate in the second channel.

7. The control method for a fuel cell system according to claim 6, characterized in that, Controlling the movement of the valve core to adjust the hydrogen flow rate in the first / second channel includes: Acquire the pressure value collected by the pressure sensor, as well as the target pressure value corresponding to the current operating condition; When the pressure value is greater than the target pressure value, the valve core is controlled to move to reduce the hydrogen flow rate in the first / second channel until the pressure value is equal to the target pressure value. When the pressure value is less than the target pressure value, the valve core is controlled to move to increase the hydrogen flow rate of the first channel / second channel until the pressure value is equal to the target pressure value. When the pressure value is equal to the target pressure value under the operating condition, the valve core is controlled to maintain its current position.

8. 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-executed instructions; The processor is used to execute computer execution instructions stored in the memory, causing the processor to perform the control method of the fuel cell system as described in claim 6 or 7.

Images