On-board hydrogen systems and operating machinery

Abstract

The present invention relates to the technical field of hydrogen fuel cells, and provides a vehicle-mounted hydrogen system and an operating machine. The vehicle-mounted hydrogen system comprises: a pressure vessel for storing hydrogen and provided with a gas port; a connecting branch connected to the gas port, the connecting branch comprising a control valve for controlling the on-off of the connecting branch, a first pressure detection device capable of detecting the pressure value of the connecting branch, and a temperature detection device capable of detecting the temperature value of the connecting branch; a gas branch connected to the connecting branch and used for introducing hydrogen into the fuel cell; a control module, respectively connected to the first pressure detection device and the temperature detection device, and controlling the operation of the control valve based on the pressure value and the temperature value. When the pressure value and the temperature value of the pressure vessel change, the surface external conditions change, and the control module timely controls the operation of the control valve, which can avoid the occurrence of dangerous conditions and improve the safety of the vehicle-mounted hydrogen system.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cells, and in particular to a vehicle-mounted hydrogen system and an operating machine. Background Art

[0002] The onboard hydrogen system is an important component of a fuel cell vehicle. It can store hydrogen and provide the required hydrogen according to the needs of the vehicle when the fuel cell is working. Hydrogen is usually set in a hydrogen cylinder. In order to improve the safety of use, a collision sensor is usually set on the mounting frame of the hydrogen cylinder in the prior art to close the hydrogen cylinder in time after the mounting frame is hit. However, this method can only provide passive protection when external trigger conditions occur, and it is impossible to actively control the hydrogen cylinder based on the situation inside the hydrogen cylinder, which is inconvenient to use. Summary of the invention

[0003] The present invention provides a vehicle-mounted hydrogen system and operating machinery, which are used to solve the defect that the method of using collision sensors to control and protect hydrogen cylinders in the prior art cannot control and protect the hydrogen cylinders based on the conditions inside the hydrogen cylinders, and can actively control the hydrogen cylinders based on the conditions inside the hydrogen cylinders, thereby improving the safety of the vehicle-mounted hydrogen system.

[0004] The present invention provides a vehicle-mounted hydrogen system, comprising:

[0005] A pressure vessel for storing hydrogen and provided with a gas port;

[0006] A connecting branch connected to the gas port, the connecting branch comprising a control valve for controlling the on-off of the connecting branch, a first pressure detection device capable of detecting the pressure value of the connecting branch, and a temperature detection device capable of detecting the temperature value of the connecting branch;

[0007] A gas branch connected to the connecting branch and used for introducing hydrogen into the fuel cell;

[0008] Control module;

[0009] Wherein, the first pressure detection device and the temperature detection device are both connected to the control module, and the control module controls the action of the control valve based on the pressure value and the temperature value.

[0010] According to a vehicle-mounted hydrogen system provided by the present invention, the control valve action is controlled based on the pressure value, including:

[0011] When it is determined that the pressure value is higher than a preset high pressure threshold, the control module controls the control valve to close;

[0012] When it is determined that the pressure value is lower than a preset low pressure threshold, the control module sends fuel cell shutdown information to the vehicle controller, and after the vehicle controller shuts down the fuel cell, the control module controls the control valve to close.

[0013] According to a vehicle-mounted hydrogen system provided by the present invention, the controlling the action of the control valve based on the temperature value includes:

[0014] When it is determined that the temperature value is higher than a preset temperature threshold, the control module controls the control valve to close.

[0015] According to the present invention, a vehicle-mounted hydrogen system further includes a first exhaust branch and a second exhaust branch;

[0016] The first drain branch is connected to the gas port, and the second drain branch is connected to an end of the pressure vessel away from the gas port. Both the first drain branch and the second drain branch can discharge the hydrogen in the pressure vessel when the hydrogen in the pressure vessel is over-temperature and / or over-pressure.

[0017] According to a vehicle-mounted hydrogen system provided by the present invention, the connecting branch further includes an overflow valve, a first regulating valve and a first filter, and the overflow valve, the first regulating valve and the first filter are all arranged in series with the control valve.

[0018] According to the present invention, a vehicle-mounted hydrogen system further includes a second regulating valve, and the second regulating valve and the connecting branch are arranged in parallel.

[0019] According to the present invention, a vehicle-mounted hydrogen system further includes a charging branch connected to the connecting branch, for replenishing hydrogen to the pressure vessel;

[0020] The control valve is an electromagnetic reversing valve. In an open state, the control valve is bidirectionally conductive. In a closed state, the control valve is unidirectionally conductive and enables the charging branch to replenish hydrogen to the pressure vessel through the connecting branch.

[0021] A vehicle-mounted hydrogen system provided according to the present invention further includes a third exhaust branch, which is connected to the gas branch and can discharge the hydrogen in the gas branch when the temperature and / or pressure in the gas branch is over-temperature and / or over-pressure.

[0022] According to an on-vehicle hydrogen system provided by the present invention, the third exhaust branch includes a safety valve and a third regulating valve arranged in parallel with the safety valve.

[0023] According to the present invention, a vehicle-mounted hydrogen system further includes a support frame and an air intake duct assembly;

[0024] The pressure vessel is arranged on the support frame, and the support frame is used to be connected to the vehicle body;

[0025] The air inlet passage is used to be connected to the fuel cell, and the air inlet passage is arranged on the side wall of the support frame.

[0026] According to a vehicle-mounted hydrogen system provided by the present invention, it also includes at least one of a hydrogen concentration sensor and a collision sensor, the hydrogen concentration sensor can detect hydrogen concentration information, the collision sensor can detect collision information suffered by the pressure vessel, the hydrogen concentration sensor and the collision sensor are both connected to the control module, and the control module also controls the action of the control valve based on the hydrogen concentration information and the collision information.

[0027] The present invention also provides a working machine, comprising the vehicle-mounted hydrogen system as described above.

[0028] The vehicle-mounted hydrogen system provided by the present invention is connected to the gas port of the pressure vessel through a connecting branch. The first pressure detection device on the connecting branch can detect the pressure value of the connecting branch, and the temperature detection device can detect the temperature value of the connecting branch. When the control valve is in an open state, the pressure value and temperature value of the connecting branch are also the pressure value and temperature value in the pressure vessel. The control module is connected to the first pressure detection device and the temperature detection device, and controls the operation of the control valve based on the pressure value and the temperature value. When the pressure value and the temperature value of the pressure vessel change, the surface external conditions change, and the control module can actively control the operation of the control valve in a timely manner, which can avoid the occurrence of dangerous conditions and improve the safety of the vehicle-mounted hydrogen system.

[0029] Furthermore, the operating machine provided by the present invention includes the vehicle-mounted hydrogen system provided by the present invention, and thus includes all the above-mentioned advantages of the operating machine at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 is a schematic structural diagram of a vehicle-mounted hydrogen system provided in an embodiment of the present invention;

[0032] Figure 2 It is a schematic structural diagram of a pressure vessel provided in an embodiment of the present invention when it is installed on a supporting frame.

[0033] Reference numerals:

[0034] 1. Combination valve; 101. Control valve; 102. First pressure detection device; 103. Temperature detection device; 104. Over-flow valve; 105. First regulating valve; 106. First filter; 107. Second regulating valve; 108. Over-temperature and over-pressure protection device; 2. Pressure vessel; 3. Connecting branch; 4. Gas branch; 5. First emptying branch; 6. Second emptying branch; 7. Third emptying branch; 8. Inflating branch; 9. Safety valve; 10. Third regulating valve; 11. Pressure reducer; 12. Second filter; 13. Low-pressure regulator; 14. Third filter; 15. Second pressure detection device; 16. Fourth filter; 17. One-way valve; 18. Pressure gauge; 19. Support frame; 20. Radiator; 21. Kettle; 22. Connecting plate; 23. Air intake duct; 24. Hydrogen concentration sensor; 25. Pressure relief pipeline. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Combine the following Figure 1 to Figure 2 The vehicle-mounted hydrogen system in an embodiment of the present invention is described.

[0037] Specifically, the on-board hydrogen system includes a pressure vessel 2, a connecting branch 3, a gas branch 4 and a control module.

[0038] The pressure container 2 is used to store hydrogen, and the pressure container 2 is provided with a gas port for hydrogen to enter and exit. For example, the pressure container 2 can be configured as a hydrogen bottle or a hydrogen tank.

[0039] The connecting branch 3 is connected to the gas port so that the hydrogen in the pressure vessel 2 can be discharged through the connecting branch 3, or the hydrogen in the external hydrogenation device can enter the pressure vessel 2 through the connecting branch 3. The connecting branch 3 includes a control valve 101, a first pressure detection device 102 and a temperature detection device 103. Among them, the control valve 101 can control the on-off of the connecting branch 3. The first pressure detection device 102 can detect the pressure value of the connecting branch 3. When the control valve 101 is in an open state, the pressure value of the connecting branch 3 is also the pressure value in the pressure vessel 2. The temperature detection device 103 can detect the temperature value of the connecting branch 3. When the control valve 101 is in an open state, the temperature value of the connecting branch 3 is also the temperature value of the pressure vessel 2. For example, the first pressure detection device 102 can be set as a pressure sensor, and the temperature detection device 103 can be set as a temperature sensor.

[0040] The gas branch 4 is connected to the connecting branch 3 and is used to introduce hydrogen into the fuel cell.

[0041] The first pressure detection device 102 and the temperature detection device 103 are both connected to the control module, and the control module controls the operation of the control valve 101 based on the pressure value detected by the first pressure detection device 102 and the temperature value detected by the temperature detection device 103. It should be noted that the control module includes but is not limited to various controllers.

[0042] The on-board hydrogen system provided in the embodiment of the present invention is connected to the gas port of the pressure vessel 2 through the connecting branch 3. The first pressure detection device 102 on the connecting branch 3 can detect the pressure value of the connecting branch 3, and the temperature detection device 103 can detect the temperature value of the connecting branch 3. When the control valve 101 is in the open state, the pressure value and temperature value of the connecting branch 3 are also the pressure value and temperature value in the pressure vessel 2. The control module is connected to the first pressure detection device 102 and the temperature detection device 103, and controls the operation of the control valve 101 based on the pressure value and the temperature value. When the pressure value and the temperature value of the pressure vessel 2 change, the surface external conditions change, and the control module can actively control the control valve operation in a timely manner, which can avoid the occurrence of dangerous conditions and improve the safety of the on-board hydrogen system.

[0043] In some embodiments provided by the present invention, based on the pressure value, controlling the action of the control valve 101 includes:

[0044] When it is determined that the pressure value is higher than the preset high pressure threshold, the control module controls the control valve 101 to close.

[0045] Specifically, when the pressure value is higher than the preset high-pressure threshold, there may be a dangerous situation such as fire, which may cause the temperature of the pressure vessel 2 to rise and then cause the pressure value inside the pressure vessel 2 to increase. At this time, the control module controls the control valve 101 to close, which can prevent hydrogen from continuing to be discharged and avoid pipeline damage causing hydrogen leakage and causing deflagration and explosion.

[0046] When it is determined that the pressure value is lower than the preset low pressure threshold, the control module sends fuel cell shutdown information to the vehicle controller, and after the vehicle controller shuts down the fuel cell, the control module controls the control valve 101 to close.

[0047] Specifically, when the pressure value is too low, it may be that there is insufficient hydrogen in the pressure vessel 2. In order to avoid the fuel cell malfunctioning and shutting down due to insufficient hydrogen, which affects the service life of the fuel cell, the control module can first send a fuel cell shutdown message to the vehicle controller, and the vehicle controller controls the fuel cell to shut down normally. After the vehicle controller sends a confirmation shutdown message to the control module, the control module controls the control valve 101 to close. Furthermore, the preset low-pressure threshold can be higher than the minimum pressure value of the pressure vessel 2 required for the normal operation of the fuel cell, so as to avoid shutting down the fuel cell after the hydrogen shortage has occurred.

[0048] In some embodiments provided by the present invention, based on the temperature value, controlling the action of the control valve 101 includes:

[0049] When it is determined that the temperature value is higher than the preset temperature threshold, the control module controls the control valve 101 to close.

[0050] Specifically, when the temperature value is higher than the preset temperature threshold, there may be a fire or other dangerous situation that causes the temperature of the pressure vessel 2 to rise. At this time, the control module controls the control valve 101 to close, which can prevent the hydrogen from continuing to be arranged and avoid pipeline damage causing hydrogen leakage and causing deflagration and explosion.

[0051] In some embodiments provided by the present invention, the on-board hydrogen system further includes a first exhaust branch 5 and a second exhaust branch 6 .

[0052] The first emptying branch 5 is connected to the gas port, and the second emptying branch 6 is connected to the end of the pressure vessel 2 away from the gas port. The first emptying branch 5 and the second emptying branch 6 can both discharge the hydrogen in the pressure vessel 2 when the hydrogen in the pressure vessel 2 is over-temperature and / or over-pressure. Optionally, the first emptying branch 5 and the second emptying branch 6 both include an emptying pipeline and an over-temperature and over-pressure protection device 108 arranged on the emptying pipeline. Among them, the emptying pipeline is connected to the pressure vessel 2 and the emptying port respectively, and the over-temperature and over-pressure protection device 108 can be opened when the pressure vessel 2 is over-temperature or over-pressure, so as to discharge the hydrogen in the pressure vessel 2 from the emptying port. It should be noted that the over-temperature and over-pressure protection device 108 is a product in the prior art, and its structure and principle are not the focus of this article, and will not be repeated here.

[0053] With such arrangement, the emptying function of the first emptying branch 5 and the second emptying branch 6 can cooperate with the control valve 101 that controls the action of the control valve 101 based on the pressure value and the temperature value, thereby providing a double protection effect for the on-board hydrogen system and improving the safety of the on-board hydrogen system.

[0054] For example, when the pressure value or temperature value of the pressure vessel 2 increases, in order to avoid deflagration and explosion caused by hydrogen leakage, the control module controls the control valve 101 to close. If the fault is not eliminated, resulting in a further increase in the pressure value or temperature value of the container, in order to avoid the problem of explosion of the pressure vessel 2, the hydrogen in the pressure vessel 2 is emptied by the first emptying branch 5 and the second emptying branch 6. Therefore, the starting pressure value set for the over-temperature and over-pressure device can be greater than or equal to the preset high pressure threshold, and the starting temperature value set for the over-temperature and over-pressure device can be greater than or equal to the preset temperature threshold.

[0055] In addition, by connecting the first emptying branch 5 to the gas port of the pressure vessel 2 and the second emptying branch 6 to the end of the pressure vessel 2 away from the gas port, on the one hand, the first emptying branch 5 and the second emptying branch 6 can simultaneously empty the pressure vessel, thereby increasing the emptying rate of the pressure vessel 2 and improving safety. On the other hand, since the pressure vessel 2 is usually long, by arranging the first emptying branch 5 and the second emptying branch 6 at the two ends of the pressure vessel 2, respectively, the problem that the emptying branch cannot be opened in time to empty the pressure vessel 2 due to uneven pressure or uneven temperature at the two ends of the pressure vessel 2 can be avoided.

[0056] In some embodiments provided by the present invention, the connecting branch 3 further includes an overflow valve 104, a first regulating valve 105 and a first filter 106. The overflow valve 104, the first regulating valve 105 and the first filter 106 are all connected in series with the control valve 101.

[0057] Among them, by setting the overflow valve 104, when the pressure vessel 2 discharges hydrogen to the gas branch 4 through the connecting branch 3, if there is a hydrogen leakage problem in the gas branch 4, the overflow valve 104 can be automatically closed to ensure the safety of the vehicle hydrogen system. It should be noted that the overflow valve 104 is a product in the prior art, and its structure and principle are not the focus of this article, and will not be repeated here.

[0058] By providing the first filter 106 , the hydrogen gas entering the gas branch line 4 can be filtered.

[0059] The flow rate of hydrogen can be adjusted by providing the first regulating valve 105. For example, the first regulating valve 105 includes but is not limited to a needle valve.

[0060] Optionally, in the flow direction of hydrogen in the connecting branch 3 when the pressure vessel 2 discharges hydrogen from the connecting branch 3, the first filter 106, the overflow valve 104, the first regulating valve 105 and the control valve 101 are connected in sequence. The first pressure detection device 102 is arranged downstream of the control valve 101, and the temperature detection device 103 is arranged between the pressure vessel 2 and the filter.

[0061] In some embodiments provided by the present invention, the vehicle-mounted hydrogen system further includes a second regulating valve 107, and the second regulating valve 107 is arranged in parallel with the connecting branch 3. In this arrangement, when a fault such as power failure occurs in the connecting branch 3, the pressure vessel 2 can discharge hydrogen to the gas branch 4 through the second regulating valve 107. Alternatively, hydrogen can be filled into the pressure vessel 2 through the second regulating valve 107. Optionally, the second regulating valve 107 includes but is not limited to a needle valve.

[0062] In some embodiments provided by the present invention, the second regulating valve 107, the control valve 101, the first pressure detection device 102, the temperature detection device 103, the over-flow valve 104, the first filter 106, the first regulating valve 105 and the over-temperature and over-pressure protection device 108 of the first exhaust branch 5 are integrated to form a combined valve 1. Such an arrangement can make the structure of the vehicle-mounted hydrogen system more compact.

[0063] In some embodiments provided by the present invention, the on-board hydrogen system further includes a charging branch 8 connected to the connecting branch 3 for replenishing hydrogen to the pressure vessel 2 .

[0064] The control valve 101 is an electromagnetic reversing valve. In the open state, the control valve 101 is bidirectional, and the pressure vessel 2 can discharge hydrogen to the gas branch 4 through the connecting branch 3. In the closed state, the control valve 101 is unidirectional, and the charging branch 8 can replenish hydrogen to the pressure vessel 2 through the connecting branch 3. In this way, the control valve 101 is in the closed state, which is equivalent to the one-way valve 17, so that the hydrogen in the pressure vessel 2 cannot be discharged, but the hydrogen in the charging branch 8 can enter the pressure vessel 2 through the control valve 101, so as to facilitate the hydrogenation of the pressure vessel 2.

[0065] Optionally, the charging branch 8 includes a charging pipeline, a fourth filter 16, a one-way valve 17 and a pressure gauge 18. One end of the charging pipeline is connected to the connecting branch 3, and the other end of the charging pipeline is used to connect to the hydrogenation device. Along the flow direction of hydrogen in the charging pipeline, the fourth filter 16, the one-way valve 17 and the pressure gauge 18 are arranged in sequence. The fourth filter 16 can filter impurities in the hydrogen, the one-way valve 17 can prevent the hydrogen in the pressure vessel 2 from flowing back to the charging pipeline, and the pressure gauge 18 can display the pressure of hydrogenation.

[0066] In some embodiments provided by the present invention, the vehicle-mounted hydrogen system further includes a third exhaust branch 7. The third exhaust branch 7 is connected to the gas branch 4, and can discharge the hydrogen in the gas branch 4 when the gas branch 4 is over-temperature and / or over-pressured. In this way, when the gas branch 4 is over-temperature or over-pressured, the third exhaust branch 7 can discharge the hydrogen in the gas branch 4 to the exhaust port in time, so as to empty the third exhaust branch 7 and avoid dangerous conditions.

[0067] Optionally, the gas branch 4 includes a gas pipeline, a pressure reducer 11 and a third filter 14. Among them, one end of the gas pipeline is connected to the connecting branch 3, and the other end of the gas pipeline is used to connect to the fuel cell. Along the flow direction of hydrogen in the gas pipeline, the third filter 14 and the pressure reducer 11 are arranged in sequence. The hydrogen discharged from the connecting branch 3 can be filtered by the third filter 14 to prevent impurities in the hydrogen from entering the fuel cell. The pressure reducer 11 can reduce the pressure of the hydrogen discharged from the connecting branch 3 to the hydrogen pressure required by the fuel cell.

[0068] Further, the pressure reducer 11 includes a second filter 12, a low-pressure regulator 13 and a second pressure detection device 15. Among them, along the flow direction of hydrogen, the second filter 12 and the low-pressure regulator 13 are arranged in sequence. The second pressure detection device 15 is connected to the outlet of the low-pressure regulator 13 and is used to detect the outlet pressure value of the low-pressure regulator 13. Optionally, the second pressure detection device 15 is connected to the control module, and the control module also controls the low-pressure regulator 13 based on the outlet pressure value detected by the second pressure detection device 15, so that the outlet pressure value meets the pressure requirement of the fuel cell.

[0069] Further, the pressure reducer 11 includes a low-pressure gas outlet and a pressure relief port. The low-pressure gas outlet is connected to the fuel cell, and the third exhaust branch 7 is connected to the low-pressure gas outlet. The pressure relief port is connected to the exhaust port through a pressure relief pipeline 25. In this way, the third exhaust branch 7 can be used to discharge hydrogen in the downstream pipeline of the pressure reducer 11, and the pressure relief port can be used to discharge hydrogen in the pressure reducer 11 and the upstream pipeline of the pressure reducer 11.

[0070] In some embodiments provided by the present invention, the third emptying branch 7 includes a safety valve 9 and a third regulating valve 10 arranged in parallel with the safety valve 9. The safety valve 9 can automatically open to empty the hydrogen in the gas branch 4 when the gas branch 4 is over-temperature or over-pressured. The gas branch 4 can be manually emptied by setting the third regulating valve 10 in parallel with the safety valve 9. Optionally, the third regulating valve 10 includes but is not limited to a needle valve. Further, the third emptying branch 7 includes an emptying pipeline, one end of the emptying pipeline is connected to the hydrogen outlet of the pressure reducer 11, and the other end of the emptying pipeline is connected to the emptying port, and the safety valve 9 and the third regulating valve 10 are arranged in parallel on the emptying pipeline.

[0071] In some embodiments provided by the present invention, there are multiple pressure vessels 2 and multiple combination valves 1. Each pressure vessel 2 is connected to the charging branch 8, the gas branch 4 and the exhaust port through the corresponding combination valve 1.

[0072] In some embodiments provided by the present invention, the vehicle-mounted hydrogen system further includes a support frame 19 and an air intake duct 23 assembly.

[0073] The pressure vessel 2 is disposed on a support frame 19, and the support frame 19 is used to be connected to a vehicle body.

[0074] The air inlet duct 23 is used to connect with the fuel cell system to provide air to the fuel cell. The air inlet duct 23 is arranged on the side wall of the support frame 19 .

[0075] By arranging both the air intake duct 23 and the pressure vessel 2 on the support frame 19, the space utilization rate of the support frame 19 can be improved, making the overall structure of the operating machine more compact.

[0076] Optionally, the support frame 19 includes a plurality of support layers distributed along the height direction of the support frame 19, and each support layer is provided with a high-pressure container. For example, each support layer is provided with two high-pressure containers.

[0077] Optionally, the support frame 19 is connected to the vehicle body through a connecting plate 22. For example, both ends of the connecting plate 22 are connected to the support frame 19 and the vehicle body respectively through threaded fasteners such as bolts.

[0078] In some embodiments provided by the present invention, the vehicle-mounted hydrogen system further includes at least one of a hydrogen concentration sensor 24 and a collision sensor. The hydrogen concentration sensor 24 can detect hydrogen concentration information, and the collision sensor can detect collision information received by the pressure vessel 2. Both the hydrogen concentration sensor 24 and the collision sensor are connected to the control module, and the control module also controls the operation of the control valve 101 based on the hydrogen concentration information and the collision information.

[0079] Further, when the control module receives the hydrogen concentration information and determines that the hydrogen concentration information is higher than the hydrogen concentration threshold, it controls the control valve 101 to close. The hydrogen concentration information is higher than the hydrogen concentration threshold, indicating that hydrogen leakage may have occurred, and further leakage of hydrogen can be prevented by closing the control valve 101.

[0080] Further, when the control module receives the collision information, it controls the control valve 101 to close. After receiving the collision information, it means that the pressure vessel 2 may be hit. In order to avoid hydrogen leakage caused by damage to the pipeline, the control valve 101 can be closed to prevent further leakage of hydrogen and ensure safety.

[0081] Optionally, at least two hydrogen concentration sensors 24 are provided, and the hydrogen concentration sensors 24 are provided on the top of the support frame 19 , and hydrogen concentration sensors 24 are provided at positions on the top of the support frame 19 corresponding to both ends of the pressure vessel 2 .

[0082] Optionally, a plurality of collision sensors are provided, and collision sensors are arranged around the supporting frame and on the vehicle body.

[0083] An embodiment of the present invention further provides a working machine.

[0084] Specifically, the work machine includes an onboard hydrogen system as described above.

[0085] It should be noted that the operating machinery includes an on-board hydrogen system, which also includes all the advantages of the on-board hydrogen system, which will not be elaborated here.

[0086] It should also be noted that the operating machinery described in the present invention includes but is not limited to commercial vehicles, excavators and cranes, wherein commercial vehicles include but are not limited to commercial heavy trucks.

[0087] In some embodiments provided by the present invention, the operating machine further includes a radiator 20 and a kettle 21 connected to the radiator 20. The radiator 20 is connected to the motor and / or the motor controller to cool the motor and the motor controller. The kettle 21 is used to replenish water to the radiator 20. The radiator 20 and the kettle 21 are both arranged on the top of the support frame 19, thereby improving the space utilization of the support frame 19 and making the overall structure of the operating machine more compact.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle-mounted hydrogen system, characterized in that: include: A pressure vessel (2) for storing hydrogen and having a gas outlet; A connecting branch (3) connected to the gas port, the connecting branch (3) comprising a control valve (101) for controlling the on / off of the connecting branch (3), a first pressure detection device (102) capable of detecting a pressure value of the connecting branch (3), and a temperature detection device (103) capable of detecting a temperature value of the connecting branch (3); a second regulating valve (107), wherein the second regulating valve (107) and the connecting branch (3) are arranged in parallel; a third exhaust branch (7), the third exhaust branch (7) being connected to the gas branch (4) and capable of exhausting hydrogen in the gas branch (4) when the gas branch (4) is over-temperature and / or over-pressure; A gas branch (4) connected to the connecting branch (3) for introducing hydrogen into the fuel cell; the gas branch (4) comprises a gas pipeline, a pressure reducer (11) and a third filter (14); one end of the gas pipeline is connected to the connecting branch (3), and the other end of the gas pipeline is used to connect to the fuel cell; along the flow direction of hydrogen in the gas pipeline, the third filter (14) and the pressure reducer (11) are arranged in sequence; The pressure reducer (11) comprises a low-pressure gas outlet and a pressure relief port, the low-pressure gas outlet is connected to the fuel cell, the third exhaust branch (7) is connected to the low-pressure gas outlet, and the pressure relief port is connected to the exhaust port via a pressure relief pipeline (25); Control module; The first pressure detection device (102) and the temperature detection device (103) are both connected to the control module, and the control module controls the operation of the control valve (101) based on the pressure value and the temperature value.

2. The vehicle-mounted hydrogen system according to claim 1, characterized in that: Based on the pressure value, controlling the action of the control valve (101) comprises: When it is determined that the pressure value is higher than a preset high pressure threshold, the control module controls the control valve (101) to close; When it is determined that the pressure value is lower than a preset low pressure threshold, the control module sends fuel cell shutdown information to the vehicle controller, and after the vehicle controller shuts down the fuel cell, the control module controls the control valve (101) to close.

3. The vehicle-mounted hydrogen system according to claim 1, characterized in that: The controlling the action of the control valve (101) based on the temperature value comprises: When it is determined that the temperature value is higher than a preset temperature threshold, the control module controls the control valve (101) to close.

4. The vehicle-mounted hydrogen system according to any one of claims 1 to 3, characterized in that: It also includes a first drain branch (5) and a second drain branch (6); The first drain branch (5) is connected to the gas port, and the second drain branch (6) is connected to an end of the pressure vessel (2) away from the gas port. Both the first drain branch (5) and the second drain branch (6) are capable of discharging the hydrogen in the pressure vessel (2) when the hydrogen in the pressure vessel (2) is over-temperature and / or over-pressured.

5. The vehicle-mounted hydrogen system according to any one of claims 1 to 3, characterized in that: The connecting branch (3) further comprises an overflow valve (104), a first regulating valve (105) and a first filter (106); the overflow valve (104), the first regulating valve (105) and the first filter (106) are all arranged in series with the control valve (101).

6. The vehicle-mounted hydrogen system according to any one of claims 1 to 3, characterized in that: It also includes a charging branch (8) connected to the connecting branch (3) and used to replenish hydrogen to the pressure container (2); The control valve (101) is an electromagnetic reversing valve. In an open state, the control valve (101) is bidirectionally conductive. In a closed state, the control valve (101) is unidirectionally conductive and enables the charging branch (8) to replenish hydrogen to the pressure vessel (2) through the connecting branch (3).

7. The vehicle-mounted hydrogen system according to claim 1, characterized in that: The third exhaust branch (7) comprises a safety valve (9) and a third regulating valve (10) arranged in parallel with the safety valve (9).

8. The vehicle-mounted hydrogen system according to any one of claims 1 to 3, characterized in that: Also included is a support frame (19) and an air intake duct (23) assembly; The pressure container (2) is arranged on the support frame (19), and the support frame (19) is used to be connected to a vehicle body; The air intake passage (23) is used to be connected to the fuel cell, and the air intake passage (23) is arranged on the side wall of the support frame (19).

9. The vehicle-mounted hydrogen system according to any one of claims 1 to 3, characterized in that: The invention also includes at least one of a hydrogen concentration sensor (24) and a collision sensor, wherein the hydrogen concentration sensor (24) is capable of detecting hydrogen concentration information, and the collision sensor is capable of detecting collision information received by the pressure vessel (2), and both the hydrogen concentration sensor (24) and the collision sensor are connected to the control module, and the control module also controls the operation of the control valve (101) based on the hydrogen concentration information and the collision information.

10. A working machine, characterized in that: Comprising the on-vehicle hydrogen system as described in any one of claims 1-9.

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