Solenoid valve and fuel cell system

Abstract

The utility model provides an electromagnetic valve and a fuel cell system. The electromagnetic valve comprises a valve body, an electromagnetic coil, a movable iron core and a detection assembly, a containing cavity is formed in the valve body, a medium inlet and a medium outlet are formed in the valve body, and a medium circulation channel is formed between the medium inlet and the medium outlet; the movable iron core is arranged in the containing cavity, the electromagnetic coil is arranged on the valve body, the electromagnetic coil is electrified to enable the movable iron core to slide between a first position and a second position, the movable iron core blocks the medium circulation channel when the movable iron core is located at the first position, and the movable iron core conducts the medium circulation channel when the movable iron core is located at the second position; the detection assembly comprises a first electric connecting piece and a second electric connecting piece, an external detection circuit is connected between the first electric connecting piece and the second electric connecting piece, and the first electric connecting piece and the second electric connecting piece can abut against the movable iron core moving to the second position so as to conduct the external detection circuit. According to the electromagnetic valve, the movable iron core can be judged to be opened in place through conduction of the detection circuit, and therefore faults can be found in time.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, and in particular to a solenoid valve. The utility model also relates to a fuel cell system provided with the solenoid valve. Background Art

[0002] A traditional solenoid valve, such as a nitrogen exhaust and drain valve used in the tail exhaust pipeline of a fuel cell system, receives an opening command from a control system, and the moving iron core in the nitrogen exhaust and drain valve is lifted by the suction of the electromagnet, and the gas and liquid in the fuel cell stack reach the outlet through the inlet of the nitrogen exhaust and drain valve. After completing the discharge task, according to the closing command of the control system, the moving iron core in the nitrogen exhaust and drain valve isolates the inlet and outlet of the nitrogen exhaust and drain valve under the action of the restoring force of the spring.

[0003] However, when the solenoid valve itself fails or the solenoid valve drive circuit fails, the moving iron core (i.e., the valve) does not open. At this time, the valve status cannot be monitored, and the valve failure can only be discovered when a more serious fault such as abnormal internal pressure of the battery stack or water flooding occurs. Utility Model Content

[0004] In view of this, the utility model aims to provide a solenoid valve, which can determine whether the moving iron core is fully opened through the conduction of an external detection circuit.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A solenoid valve comprises a valve body, a solenoid coil, a moving iron core and a detection component;

[0007] An accommodating cavity is formed in the valve body, and a medium inlet and a medium outlet communicating with the accommodating cavity are provided on the valve body, and a medium flow channel is formed between the medium inlet and the medium outlet;

[0008] The moving iron core is arranged in the accommodating cavity, the electromagnetic coil is arranged on the valve body, and the electromagnetic coil is energized to enable the moving iron core to slide between a first position and a second position, the moving iron core blocks the medium flow channel when in the first position, and opens the medium flow channel when in the second position;

[0009] The detection component includes a first electrical connector and a second electrical connector disposed on the valve body, the first electrical connector and the second electrical connector are used to connect an external detection circuit, and the first electrical connector and the second electrical connector can abut against the moving iron core moved to the second position to conduct the external detection circuit.

[0010] Furthermore, a guide structure is provided between the valve body and the moving iron core, and the guide structure is used to guide the moving iron core to slide in the valve body.

[0011] Furthermore, the guide structure includes a guide hole provided on the valve body, and a guide column provided on the moving iron core, and the guide column is inserted into the guide hole.

[0012] Furthermore, there are two guide holes, both of which penetrate the valve body, and the first electrical connector and the second electrical connector are respectively inserted into the two guide holes; the first electrical connector and the second electrical connector both have an exposed portion located outside the valve body.

[0013] Furthermore, the first electrical connector is provided with a first boss protruding outwardly around itself, and the first boss is overlapped on the valve body; and / or the second electrical connector is provided with a second boss protruding outwardly around itself, and the second boss is overlapped on the valve body.

[0014] Furthermore, the valve body includes a valve seat and a static iron core that are snap-fitted together; the accommodating cavity is defined between the valve seat and the static iron core, and the medium inlet and the medium outlet are arranged on the valve seat.

[0015] Furthermore, the electromagnetic coil is sleeved outside the static iron core.

[0016] Furthermore, an elastic reset member is provided between the static iron core and the moving iron core; the elastic reset member can store energy when the moving iron core moves from a first position to a second position; the elastic reset member can release energy when the moving iron core is in the second position, driving the moving iron core to slide from the second position to the first position.

[0017] Furthermore, the medium inlet is arranged in a plurality and spaced apart from each other in the circumferential direction of the valve seat, and each of the medium inlets is connected to the accommodating cavity; and / or the medium outlet is arranged at an end of the valve seat opposite to the static iron core.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The solenoid valve described in the utility model, through the detection component set up, can make the moving iron core move to the second position of the conductive medium flow channel, so that it can abut against the first electrical connector and the second electrical connector in the detection component to conduct the external detection circuit. Therefore, by utilizing the conduction of the external detection circuit, it is judged that the moving iron core is fully opened, which is conducive to timely discovering the fault of the moving iron core itself or the fault of the solenoid valve drive circuit, and has a very good use effect.

[0020] In addition, the guide structure provided between the valve body and the moving iron core is conducive to guiding the moving iron core to move between the first position and the second position in the valve body. The guide structure adopts the cooperation of the guide hole and the guide column, and its structure is simple and easy to process and manufacture. There are two guide holes, and the first electrical connector and the second electrical connector are respectively inserted into the two guide holes, so that the two guide columns can respectively share the guide holes corresponding to the first electrical connector and the second electrical connector, thereby making the structure more compact.

[0021] Secondly, the provision of the first boss is conducive to improving the stability of the installation of the first electrical connector on the valve body. The provision of the second boss is conducive to improving the stability of the installation of the second electrical connector on the valve body. The valve body adopts a valve seat and a static iron core that are connected by snapping, and its structure is simple and easy to process and manufacture. The elastic reset member between the static iron core and the moving iron core is conducive to resetting the moving iron core from the second position to the first position, and can save the reverse current passed through the electromagnetic coil to reset the moving iron core, and has a better reset effect.

[0022] In addition, the medium inlet is arranged in multiple positions on the circumference of the valve seat, which can facilitate the medium to fully flow into the accommodating cavity. The medium outlet is arranged at the end of the valve seat opposite to the static iron core, which facilitates the moving iron core to move to block the medium outlet or release the blockage of the medium outlet.

[0023] Another object of the present invention is to provide a fuel cell system, wherein the fuel cell system is provided with the solenoid valve as described above.

[0024] The fuel cell system of the utility model adopts the above-mentioned solenoid valve and can use the conduction of the external detection circuit to determine whether the moving iron core is fully opened, so that the solenoid valve failure can be discovered in time to avoid more serious failures of the battery stack in the fuel cell system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0026] Figure 1 A three-dimensional diagram of a solenoid valve according to an embodiment of the utility model;

[0027] Figure 2 It is a cross-sectional view of the solenoid valve described in the embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the valve seat according to an embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the static iron core according to an embodiment of the utility model;

[0030] Figure 5 This is a schematic structural diagram of the moving iron core according to an embodiment of the utility model;

[0031] Figure 6 It is a schematic diagram of the structure of the first electrical connector and the second electrical connector according to an embodiment of the utility model;

[0032] Description of reference numerals:

[0033] 1. Valve body; 2. Electromagnetic coil; 3. Moving iron core; 4. First electrical connection member; 5. Second electrical connection member; 6. Elastic reset member; 10. Accommodating chamber;

[0034] 101, valve seat; 102, static iron core; 1011, medium inlet; 1012, medium outlet; 1013, plug-in end; 1014, abutting convex edge; 1021, guide hole; 1022, first mounting groove; 301, guide column; 302, second mounting groove; 401, first boss; 501, second boss. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0036] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0039] Embodiment 1

[0040] The present embodiment relates to a solenoid valve, which can use the conduction of a detection circuit to determine whether the moving iron core is fully opened, thereby facilitating timely detection of faults.

[0041] In terms of overall structure, Figure 1 and Figure 2 As shown, the solenoid valve of this embodiment includes a valve body 1, an electromagnetic coil 2, a moving iron core 3 and a detection component.

[0042] The valve body 1 has an accommodating cavity 10 formed therein, and the valve body 1 is provided with a medium inlet 1011 and a medium outlet 1012 communicating with the accommodating cavity 10, and a medium flow channel is formed between the medium inlet 1011 and the medium outlet 1012. The moving iron core 3 is arranged in the accommodating cavity 10, and the electromagnetic coil 2 is arranged on the valve body 1. When the electromagnetic coil 2 is energized, the moving iron core 3 can slide between a first position and a second position. The moving iron core 3 blocks the medium flow channel when in the first position, and conducts the medium flow channel when in the second position.

[0043] The detection component includes a first electrical connector 4 and a second electrical connector 5 arranged on the valve body 1. The first electrical connector 4 and the second electrical connector 5 are used to connect an external detection circuit. The first electrical connector 4 and the second electrical connector 5 can abut against the moving iron core 3 moved to the second position to conduct the external detection circuit.

[0044] At this time, in the above structure, when the electromagnetic coil 2 is energized, the moving iron core 3 slides between the first position and the second position in the accommodating chamber 10 to block or open the medium channel between the medium inlet 1011 and the medium outlet 1012, and when the moving iron core 3 moves to the second position, that is, to open the medium flow channel, the moving iron core 3 abuts against the first electrical connector 4 and the second electrical connector 5 in the detection component, so that a conductive loop is formed between the moving iron core 3, the first electrical connector 4, the external detection circuit, and the second electrical connector 5, that is, the external detection circuit is turned on, thereby, by detecting whether the external detection circuit is turned on, it is determined whether the moving iron core 3 is opened in place, which is conducive to timely detection of faults in the moving iron core 3 itself or faults in the solenoid valve drive circuit.

[0045] It should be noted that the sliding of the moving iron core 3 between the first position and the second position in the accommodating chamber 10 can be achieved, for example, by passing a forward current and a reverse current into the electromagnetic coil 2, or by passing a current in only one direction into the electromagnetic coil 2 according to the direction in which the moving iron core 3 moves, and by energizing and de-energizing the electromagnetic coil 2, and cooperating with the gravity of the moving iron core 3 itself when de-energized, the sliding of the moving iron core 3 between the first position and the second position is achieved. Of course, an elastic reset member 6 can also be provided, which cooperates with the energization and de-energization of the electromagnetic coil 2 to achieve the sliding of the moving iron core 3 between the first position and the second position, and both are feasible.

[0046] It should also be noted that the medium passing through the medium inlet 1011 and the medium outlet 1012 can be gas, liquid, or a mixture of gas and liquid.

[0047] Based on the above overall structure, for details, continue to refer to Figure 1 and Figure 2 As shown, combined with Figures 3 to 6 In this embodiment, the valve body 1 includes a valve seat 101 and a static iron core 102 that are snap-fitted together. The above-mentioned accommodating chamber 10 is defined between the valve seat 101 and the static iron core 102, and a medium inlet 1011 and a medium outlet 1012 are provided on the valve seat 101. The valve seat 101 is made of an insulating material, and the insulating material can be made of, for example, EPDM rubber or fluororubber to ensure an insulating connection between the valve seat 101 and the static iron core 102. Moreover, the valve seat 101 and the static iron core 102 are also sealed to ensure a sealing effect of the accommodating chamber 10, and to prevent the medium entering the accommodating chamber 10 from leaking from between the valve seat 101 and the static iron core 102.

[0048] In specific implementation, the valve seat 101 and the static iron core 102 are preferably connected by plug-in. Specifically, the valve seat 101 has a cylindrical shell, and the outer diameter of the shell has a large diameter section and a small diameter section connected. The large diameter section and the small diameter section are connected by a horizontal connecting end face, and the small diameter section constitutes the plug-in end 1013, and the connecting end face constitutes the abutting ridge 1014. The static iron core 102 also has a cylindrical shell. During assembly, the plug-in end 1013 is inserted into the static iron core 102 and abuts against the inner wall of the static iron core 102, and the bottom end of the static iron core 102 abuts against the abutting ridge 1014. In order to ensure the sealed connection between the plug-in end 1013 and the static iron core 102, for example, a sealant can be applied between the plug-in end 1013 and the static iron core 102.

[0049] In this embodiment, when the moving iron core 3 is in the first position, in order to ensure better blocking of the medium flow channel formed between the medium inlet 1011 and the medium outlet 1012, the moving iron core 3 is connected to the moving iron core 3. Figure 2 , Figure 3 and Figure 5 As shown, a boss is provided on the valve seat 101, and the medium outlet 1012 is arranged through the boss. In this way, when the moving iron core 3 is in the first position, it can be pressed against the boss, and by utilizing the characteristics of the material of the valve seat 101, the moving iron core 3 can better block the medium outlet 1012, thereby better blocking the medium flow channel.

[0050] See also Figures 1 to 6As shown, in this embodiment, the medium inlet 1011 is arranged in a plurality of intervals in the circumferential direction of the valve seat 101, and each medium inlet 1011 is connected to the accommodating chamber 10. The plurality of medium inlets 1011 provided at this time can facilitate the medium to flow into the accommodating chamber 10 more fully and evenly, and also facilitate the moving iron core 3 to move more smoothly between the first position and the second position. In addition, the medium outlet 1012 is specifically provided at the end of the valve seat 101 opposite to the static iron core 102, so that the medium outlet 1012 is arranged in the moving direction of the moving iron core 3, and the moving iron core 3 is better utilized to block the medium outlet 1012 or release the blockage of the medium outlet 1012.

[0051] Continue to view Figures 1 to 6 As shown, in this embodiment, the electromagnetic coil 2 is specifically sleeved on the outer side of the static iron core 102. In order to facilitate the moving iron core 3 to move between the first position and the second position in the valve body 1, in this embodiment, a guide structure is provided between the valve body 1 and the moving iron core 3, and the guide structure is used to guide the moving iron core 3 to slide in the valve body 1. As a preferred embodiment, the guide structure of this embodiment includes a guide hole 1021 provided on the valve body 1, and a guide column 301 provided on the moving iron core 3, and the guide column 301 is inserted into the guide hole 1021. In this way, the guide structure adopts the cooperation of the guide hole 1021 and the guide column 301, and its structure is simple and easy to process and manufacture.

[0052] As a further preferred embodiment, in this embodiment, there are two guide holes 1021, both of which are set through the valve body 1, and the first electrical connector 4 and the second electrical connector 5 are respectively inserted into the two guide holes 1021. In specific implementation, the two guide holes 1021 are preferably set on the static iron core 102 to facilitate the arrangement of the first electrical connector 4 and the second electrical connector 5. Moreover, the first electrical connector 4 and the second electrical connector 5 both have exposed portions located outside the valve body 1, so that the exposed portions of the first electrical connector 4 and the second electrical connector 5 are used to connect the two ends of the external detection circuit, so that the connection of the external detection circuit is more convenient.

[0053] At the same time, corresponding to the number of guide holes 1021, there are two guide posts 301 disposed on the moving iron core 3. The two guide posts 301 respectively share the guide holes 1021 corresponding to the first electrical connector 4 and the second electrical connector 5, thus making the overall structure of the solenoid valve more compact.

[0054] Preferably, the first electrical connector 4 and the second electrical connector 5 are respectively a positive pole and a negative pole. The positive pole and the negative pole are specifically arranged on the static iron core 102 at intervals and are respectively insulated and connected to the static iron core 102.

[0055] In order to ensure the connection effect of the first electrical connector 4 and the second electrical connector 5 on the valve body 1, in this embodiment, the first electrical connector 4 is provided with a first boss 401 protruding outward around its own circumference, and the first boss 401 is overlapped on the valve body 1. The second electrical connector 5 is provided with a second boss 501 protruding outward around its own circumference, and the second boss 501 is overlapped on the valve body 1. In other words, the positive pole column and the negative pole column are respectively provided with the first boss 401 and the second boss 501, and the positive pole column and the negative pole column are overlapped on the valve body 1 through the first boss 401 and the second boss 501, respectively, so that the connection effect of the positive pole column and the negative pole column on the static iron core 102 is ensured.

[0056] It is worth noting that, in addition to providing the first boss 401 and the second boss 501 on the first electrical connector 4 and the second electrical connector 5 respectively, it is also possible to provide the first boss 401 only on the first electrical connector 4, or to provide the second boss 501 only on the second electrical connector 5.

[0057] Moreover, in order to ensure the insulation connection between the positive pole and the negative pole and the static iron core 102, an insulating part can be set between the positive pole and the static iron core 102, as well as between the negative pole and the static iron core 102. The insulating part can be, for example, a ceramic insulating sleeve, thereby achieving insulation isolation between the positive pole and the static iron core 102, as well as between the negative pole and the static iron core 102, thereby preventing short circuit and ensuring the use effect of the external detection circuit.

[0058] It should be noted that, in this embodiment, the external detection circuit includes, for example, a wire connected between the first electrical connector 4 and the second electrical connector 5, and a power supply and a current monitor arranged on the wire. In specific use, the moving iron core 3 moves to the second position under the action of magnetic attraction. At this time, the moving iron core 3 abuts against the first electrical connector 4 and the second electrical connector 5, that is, the moving iron core 3 abuts against the positive pole and the negative pole respectively. At this time, a conductive current loop is formed between the moving iron core 3, the positive pole, the wire and the negative pole, and the current monitor detects that there is current passing through the wire. If the current monitor does not detect the current in the wire, it means that the external detection circuit is not connected and the moving iron core 3 has not moved to the second position.

[0059] It should also be noted that the external detection circuit of the present embodiment also includes, for example, a wire connected between the first electrical connector 4 and the second electrical connector 5, as well as a power supply provided on the wire and a current signal line connected to the wire. The current signal line can be connected to the controller of the device, and the controller can feedback whether there is current passing through the external detection circuit. In this way, it is also possible to judge whether the moving iron core 3 is fully opened based on whether the detection circuit is conductive.

[0060] To ensure that the moving iron core 3 can be reliably moved from the second position to the first position, in this embodiment, an elastic reset member 6 is also provided between the static iron core 102 and the moving iron core 3. The elastic reset member 6 can store energy when the moving iron core 3 moves from the first position to the second position, and the elastic reset member 6 can release energy when the moving iron core 3 is in the second position, thereby driving the moving iron core 3 to slide from the second position to the first position.

[0061] Under normal conditions, the moving iron core 3 is kept in the first position under the action of the elastic reset member 6. When the electromagnetic coil 2 is energized, the moving iron core 3 receives the magnetic attraction of the static iron core 102 and moves from the first position to the second position. At this time, the elastic reset member 6 is compressed and stores energy. When the electromagnetic coil 2 loses power, the magnetic attraction is removed. At this time, the elastic reset member 6 releases energy and drives the moving iron core 3 to slide and reset from the second position to the first position. At this time, the setting of the elastic reset member 6 not only utilizes the reset of the moving iron core 3, but also can drive the moving iron core 3 to reset by passing a reverse current through the water electromagnetic coil 2, and at the same time can also protect a better reset effect.

[0062] In specific implementation, the elastic return member 6 of this embodiment preferably adopts a spring, and to facilitate the installation of the elastic return member 6, a first mounting groove 1022 is provided on the static iron core 102, and a second mounting groove 302 is provided on the moving iron core 3, the first mounting groove 1022 and the second mounting groove 302 are arranged relative to each other, and the two ends of the elastic return member 6 are respectively installed in the first mounting groove 1022 and the second mounting groove 302, and are respectively connected to the static iron core 102 and the moving iron core 3.

[0063] The solenoid valve of this embodiment can determine whether the moving iron core 3 is fully opened by the conduction of the external detection circuit, so as to timely discover the fault of the moving iron core 3 itself or the fault of the solenoid valve driving circuit, and has a good use effect.

[0064] Embodiment 2

[0065] The present embodiment relates to a fuel cell system, in which the solenoid valve described in the first embodiment is provided. In a specific implementation, the solenoid valve is, for example, provided on the anode outlet pipeline of the fuel cell system to discharge nitrogen and water. The moving iron core 3 moves to the second position under the magnetic adsorption of the static iron core 102, and the gas and liquid in the battery stack reach the medium outlet 1012 through the medium inlet 1011 on the battery valve to complete the discharge work. When the static iron core 102 loses power, the elastic force of the elastic reset member 6 is used to drive the moving iron core 3 to move from the second position to the first position, and at this time, the medium flow channel between the medium inlet 1011 and the medium outlet 1012 is blocked.

[0066] The fuel cell system of this embodiment, by adopting the solenoid valve of the first embodiment, can use the conduction of the external detection circuit to determine whether the moving iron core 3 is fully opened, so that the solenoid valve failure can be discovered in time to avoid more serious failures in the fuel cell stack in the fuel cell system.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solenoid valve, characterized in that: It comprises a valve body (1), an electromagnetic coil (2), a moving iron core (3) and a detection component; An accommodating cavity (10) is formed in the valve body (1), and a medium inlet (1011) and a medium outlet (1012) communicating with the accommodating cavity (10) are provided on the valve body (1), and a medium flow channel is formed between the medium inlet (1011) and the medium outlet (1012); The moving iron core (3) is arranged in the accommodating cavity (10), and the electromagnetic coil (2) is arranged on the valve body (1). When the electromagnetic coil is energized, the moving iron core (3) can slide between a first position and a second position. When the moving iron core (3) is in the first position, it blocks the medium flow channel, and when the moving iron core (3) is in the second position, it opens the medium flow channel. The detection component includes a first electrical connector (4) and a second electrical connector (5) arranged on the valve body (1), and the first electrical connector (4) and the second electrical connector (5) are used to connect an external detection circuit. The first electrical connector (4) and the second electrical connector (5) can abut against the moving iron core (3) moved to the second position to conduct the external detection circuit.

2. The solenoid valve according to claim 1, characterized in that: A guide structure is provided between the valve body (1) and the moving iron core (3), and the guide structure is used to guide the moving iron core (3) to slide inside the valve body (1).

3. The solenoid valve according to claim 2, characterized in that: The guide structure comprises a guide hole (1021) provided on the valve body (1), and a guide column (301) provided on the moving iron core (3), wherein the guide column (301) is inserted into the guide hole (1021).

4. The solenoid valve according to claim 3, characterized in that: There are two guide holes (1021), and both guide holes (1021) are arranged through the valve body (1), and the first electrical connector (4) and the second electrical connector (5) are respectively inserted into the two guide holes (1021); The first electrical connector (4) and the second electrical connector (5) both have an exposed portion located outside the valve body (1).

5. The solenoid valve according to claim 4, characterized in that: The first electrical connector (4) is provided with a first boss (401) protruding outwardly around the first electrical connector (4), and the first boss (401) overlaps the valve body (1); and / or, The second electrical connector (5) is provided with a second boss (501) which protrudes outwards around the second electrical connector (5), and the second boss (501) overlaps the valve body (1).

6. The solenoid valve according to any one of claims 1 to 5, characterized in that: The valve body (1) comprises a valve seat (101) and a static iron core (102) which are snap-fitted and connected; The accommodating chamber (10) is defined between the valve seat (101) and the static iron core (102), and the medium inlet (1011) and the medium outlet (1012) are arranged on the valve seat (101).

7. The solenoid valve according to claim 6, characterized in that: The electromagnetic coil (2) is sleeved outside the static iron core (102).

8. The solenoid valve according to claim 6, characterized in that: An elastic reset member (6) is provided between the static iron core (102) and the movable iron core (3); The elastic reset member (6) can store energy when the moving iron core (3) moves from the first position to the second position; the elastic reset member (6) can release energy when the moving iron core (3) is located in the second position, so as to drive the moving iron core (3) to slide from the second position to the first position.

9. The solenoid valve according to claim 6, characterized in that: The medium inlet (1011) is a plurality of medium inlets (1011) arranged at intervals in the circumferential direction of the valve seat (101), and each of the medium inlets (1011) is in communication with the accommodating chamber (10); and / or, The medium outlet (1012) is arranged at an end of the valve seat (101) opposite to the static iron core (102).

10. A fuel cell system, characterized in that: The fuel cell system is provided with the solenoid valve according to any one of claims 1 to 9.

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