Fuel cell power device

Abstract

The fuel cell power device comprises a plurality of electric piles, and each electric pile is provided with an air inlet, an air outlet, a hydrogen inlet, a hydrogen outlet, a cooling inlet and a cooling outlet; the air inlet and outlet device comprises a first pipeline, a second pipeline and a humidifier; the multiple hydrogen inlet and outlet devices are matched with the multiple electric piles in a one-to-one correspondence mode, each hydrogen inlet and outlet device comprises a third pipeline, a fourth pipeline and a steam-water separator, an inlet of the third pipeline is used for introducing hydrogen, an outlet of the third pipeline is communicated with a hydrogen inlet of the corresponding electric pile, and an outlet of the fourth pipeline is communicated with a steam-water separator; an inlet of the fourth pipeline is communicated with a hydrogen outlet of the corresponding electric pile, and an outlet of the fourth pipeline is communicated with the steam-water separator; and the cooling device comprises a cooling pipeline, a water pump and a temperature adjusting device. Therefore, the fuel cell power device has the advantages of being convenient to control and high in reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a fuel cell power device. Background Art

[0002] A hydrogen fuel cell is a power generation device that continuously converts the chemical energy in hydrogen and oxygen into electrical energy. It has the characteristics of low temperature, high efficiency, and zero emissions. In terms of structural mechanism, traditional batteries generally store chemical energy inside the battery, and the capacity is limited. Once the chemical energy is consumed, it needs to be replenished. If it does not support charging, the battery life will be over. As long as the fuel cell continues to supply the required hydrogen and oxygen, it can continue to generate electricity efficiently at a specific temperature. Due to technical defects such as too many chips, too long gas flow channels, and too high coolant temperature differences, the single stack system cannot achieve unlimited output power improvement. Correspondingly, the dual stack system and multi-stack distributed system overcome the above defects and are widely used in high-power fuel cell projects. However, high-power fuel cell systems require more equipment to be controlled, the control is more complex, and the consistency and durability control of multiple stacks are required to be higher. It is difficult for the system to operate efficiently for a long time, the failure rate is high, and maintenance is also more complicated. The large number of equipment leads to increased system costs. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a fuel cell power device.

[0004] The fuel cell power device according to the embodiment of the present invention comprises:

[0005] A plurality of fuel cell stacks, each of the fuel cell stacks having an air inlet, an air outlet, a hydrogen inlet, a hydrogen outlet, a cooling inlet, and a cooling outlet;

[0006] An air inlet and outlet device, the air inlet and outlet device comprising a first pipeline, a second pipeline and a humidifier, the inlet of the first pipeline is used to let in air, the outlet of the first pipeline is connected to the air inlets of the plurality of battery stacks in a one-to-one correspondence through a plurality of first sub-pipelines, the humidifier is used to increase the air humidity in the first pipeline, the inlet of the second pipeline is connected to the air outlets of the plurality of battery stacks in a one-to-one correspondence through a plurality of second sub-pipelines;

[0007] A plurality of hydrogen inlet and outlet devices, wherein the plurality of hydrogen inlet and outlet devices are matched with the plurality of the battery stacks in a one-to-one correspondence, each of the hydrogen inlet and outlet devices comprises a third pipeline, a fourth pipeline and a steam-water separator, the inlet of the third pipeline is used to introduce hydrogen, the outlet of the third pipeline is communicated with the hydrogen inlet of the corresponding battery stack, the inlet of the fourth pipeline is communicated with the hydrogen outlet of the corresponding battery stack, the outlet of the fourth pipeline is communicated with the steam-water separator, the gas outlet of the steam-water separator is used to discharge hydrogen, and a steam trap is provided on the water outlet of the steam-water separator, and the steam trap can adjust the drainage flow of the water outlet of the steam-water separator;

[0008] A cooling device, the cooling device includes a cooling pipeline, a water pump and a temperature regulating device, the temperature regulating device is used to regulate the temperature of the coolant in the cooling pipeline, the water pump is arranged on the cooling pipeline, the outlet of the cooling pipeline is connected to the cooling inlet of the multiple fuel cell stacks in a one-to-one correspondence through a plurality of first sub-cooling pipelines, and the inlet of the cooling pipeline is connected to the cooling outlet of the multiple fuel cell stacks in a one-to-one correspondence through a plurality of second sub-cooling pipelines.

[0009] Therefore, the fuel cell power device according to the embodiment of the present invention has the advantages of easy control and high reliability.

[0010] In some embodiments, the humidifier has an air supply cavity and a humidification cavity, the air supply cavity is connected to the first pipeline, the water vapor in the humidification cavity can be passed into the air supply cavity to increase the air humidity in the air supply cavity, the inlet of the humidification cavity is connected to the outlets of multiple second sub-pipelines, and the outlet of the humidification cavity is connected to the second pipeline.

[0011] In some embodiments, the humidifier has a heat exchange cavity, which is used to pass cold fluid to reduce the air temperature in the air supply cavity. The inlet of the heat exchange cavity is connected to the outlet of the cooling pipeline through a first heat exchange pipeline. A throttling ring is provided on the first heat exchange pipeline. The outlet of the heat exchange cavity is connected to the inlet of the cooling pipeline through a second heat exchange pipeline.

[0012] In some embodiments, the air inlet and outlet device includes a filter, a flow meter and an air compressor arranged on the first pipeline, and the filter, the flow meter, the air compressor and the humidifier are arranged in sequence on the first pipeline along the air flow direction in the first pipeline.

[0013] In some embodiments, a back pressure throttle is provided on the second pipeline;

[0014] The air inlet and outlet device includes a purge pipeline, the inlet of the purge pipeline is connected to the first pipeline, the inlet of the purge pipeline is located between the humidifier and the outlet of the first pipeline on the first pipeline, the outlet of the purge pipeline is connected to the second pipeline, the outlet of the purge pipeline is located between the inlet of the second pipeline and the back pressure throttle on the second pipeline, and a purge throttle is provided on the purge pipeline.

[0015] In some embodiments, each of the hydrogen inlet and outlet devices includes an ejector, which is disposed on the third pipeline. The gas outlet of the steam-water separator is connected to the ejector cavity of the ejector, and the ejector is used to eject the hydrogen discharged from the gas outlet of the steam-water separator into the third pipeline.

[0016] In some embodiments, an isolation valve is provided at the inlet of the third pipeline, and the inlet of the third pipeline is connected to the hydrogen storage cylinder group;

[0017] The outlet of the drain valve is connected to the second pipeline through a drain pipeline. The connection point between the outlet of the drain pipeline and the second pipeline is adjacent to the outlet of the second pipeline. A muffler is provided at the outlet of the second pipeline.

[0018] In some embodiments, the cooling device includes an expansion water tank, the outlet of which is connected to the cooling pipeline, the expansion water tank is used to replenish water to the cooling pipeline, and the outlet of the expansion water tank is located between the temperature regulating device and the water pump on the cooling pipeline.

[0019] In some embodiments, a particle filter is provided on the cooling pipeline, and the temperature regulating device, the outlet of the expansion water tank, the water pump and the particle filter are sequentially arranged on the cooling pipeline in a direction away from the outlet of the cooling pipeline;

[0020] A portion of the cooling pipeline is a heating pipeline and a heat dissipation pipeline arranged in parallel;

[0021] The temperature regulating device comprises a temperature control valve, a heater and a radiator, the inlet of the temperature control valve is connected with the outlet of the heat dissipation pipeline and the outlet of the heating pipeline, the heater is arranged on the heating pipeline, and the radiator is arranged on the heat dissipation pipeline;

[0022] The second sub-cooling pipeline is in communication with the first exhaust pipeline, the outlet of the first exhaust pipeline is in communication with the inlet of the expansion water tank, and a deionization tank is provided on the first exhaust pipeline;

[0023] The heat dissipation pipeline is communicated with the second exhaust pipeline, the outlet of the second exhaust pipeline is communicated with the inlet of the expansion water tank, and the inlet of the second exhaust pipeline is located on the heat dissipation pipeline between the radiator and the outlet of the heat dissipation pipeline.

[0024] In some embodiments, the number of the battery stacks is two, the number of the hydrogen inlet and outlet devices is two, and the two hydrogen inlet and outlet devices are matched with the two battery stacks in a one-to-one correspondence;

[0025] The steam trap can affect the voltage of the corresponding fuel cell stack by adjusting the drainage flow rate of the water outlet of the steam-water separator;

[0026] Each of the battery stacks has a patrol device coordinated therewith, and the patrol device is used to monitor the voltage of the corresponding battery stack;

[0027] A hydrogen concentration detector is provided in the box of each of the fuel cell stacks, and the hydrogen concentration detector is used to monitor the hydrogen leakage in the corresponding fuel cell stack;

[0028] A pressure sensor and a temperature sensor are provided at the air inlet, the air outlet, the hydrogen inlet, the hydrogen outlet, the cooling inlet and the cooling outlet of each fuel cell stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of a fuel cell power plant according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] 1. first pipeline, 11. first sub-pipeline, 12. humidifier, 13. filter, 14. flow meter, 15. air compressor, 16. first heat exchange pipeline, 17. second heat exchange pipeline, 18. throttling ring;

[0032] 2. second pipeline, 21. second sub-pipeline, 22. back pressure throttle, 23. purge pipeline, 24. purge throttle;

[0033] 3. The third pipeline, 31. The ejector, 32. The isolation valve, 33. The hydrogen storage cylinder group;

[0034] 4. Fourth pipeline, 41. Steam-water separator, 42. Steam trap, 43. Steam trap pipeline, 44. Muffler;

[0035] 5. cooling pipeline, 51. first sub-cooling pipeline, 52. second sub-cooling pipeline, 53. temperature control valve, 54. heater, 55. radiator, 56. heating pipeline, 57. cooling pipeline, 58. water pump, 59. particulate filter;

[0036] 6. Fuel cell, 61. Air inlet, 62. Air outlet, 63. Hydrogen inlet, 64. Hydrogen outlet, 65. Cooling inlet, 66. Cooling outlet;

[0037] 71. Hydrogen concentration detector, 72. Inspection device;

[0038] 81. expansion water tank, 82. first exhaust pipeline, 83. deionization tank, 84. second exhaust pipeline. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0040] The fuel cell power device according to the embodiment of the present invention is described below with reference to the accompanying drawings. Figure 1 As shown, the fuel cell power device according to the embodiment of the present invention includes a plurality of fuel cell stacks 6, an air inlet and outlet device, a plurality of hydrogen inlet and outlet devices, and a cooling device.

[0041] Each stack 6 has an air inlet 61, an air outlet 62, a hydrogen inlet 63, a hydrogen outlet 64, a cooling inlet 65 and a cooling outlet 66. Specifically, air enters the stack 6 from the air inlet 61, and unconsumed air and a portion of water vapor are discharged from the air outlet 62. Hydrogen is introduced into the stack 6 from the hydrogen outlet 63, and water generated by the reaction and unconsumed hydrogen are discharged from the hydrogen outlet 64. Coolant can be introduced into the stack 6 from the cooling inlet 65 to cool the stack 6, so that the reaction temperature of the stack 6 can be made to be the desired temperature, and the coolant after heat exchange can be discharged from the cooling outlet 66.

[0042] In some embodiments, pressure sensors and temperature sensors are provided at the air inlet 61, air outlet 62, hydrogen inlet 63, hydrogen outlet 64, cooling inlet 65 and cooling outlet 66 of each fuel cell stack 6 to measure the fluid pressure and temperature at the air inlet 61, air outlet 62, hydrogen inlet 63, hydrogen outlet 64, cooling inlet 65 and cooling outlet 66, so as to detect the real-time process parameters of the fuel cell stack 6.

[0043] like Figure 1 As shown, in some embodiments, each battery stack 6 has a patrol device 72 matched therewith, and the patrol device 72 is used to monitor the voltage of the corresponding battery stack 6. The patrol device 72 (patrol integrated module) is used to detect the real-time status of the single-chip voltage of the battery stack 6.

[0044] In some embodiments, a hydrogen concentration detector 71 is provided in the box of each fuel cell stack 6 , and the hydrogen concentration detector 71 is used to monitor hydrogen leakage in the corresponding fuel cell stack 6 .

[0045] The air inlet and outlet device comprises a first pipeline 1 , a second pipeline 2 and a humidifier 12 .

[0046] The inlet of the first pipeline 1 is used to pass air, and the outlet of the first pipeline 1 is connected to the air inlets 61 of the multiple stacks 6 in one-to-one correspondence through the multiple first sub-pipelines 11, and the inlet of the second pipeline 2 is connected to the air outlets 62 of the multiple stacks 6 in one-to-one correspondence through the multiple second sub-pipelines 21. Specifically, the multiple first sub-pipelines 11 are connected to the multiple air inlets 61 in one-to-one correspondence, and the first pipeline 1 is connected to the multiple first sub-pipelines 11, and air can be passed into the multiple air inlets 61 through the multiple first sub-pipelines 11, and distributed to each stack 6 with equal pressure and equal flow through the internal distributor of the stack module. The multiple air outlets 62 are connected to the multiple second sub-pipelines 21 in one-to-one correspondence, and the multiple air outlets 62 can pass the exhaust gas into the second pipeline 2 through the multiple second sub-pipelines 21 and then discharge it.

[0047] The humidifier 12 is used to increase the air humidity in the first pipeline 1. Specifically, the humidifier 12 has an air supply cavity and a humidification cavity, and the air supply cavity is connected to the first pipeline 1, and air can enter the air supply cavity. The water vapor in the humidification cavity can be passed into the air supply cavity to increase the air humidity in the air supply cavity. The inlet of the humidification cavity is connected to the outlets of the plurality of second sub-pipelines 21, and the outlet of the humidification cavity is connected to the second pipeline 2. In other words, the exhaust gas (with water vapor) coming out of the plurality of air outlets 62 can first be passed into the humidification cavity through the second sub-pipeline 21, the water vapor in the humidification cavity can be passed into the air supply cavity, and the air in the humidification cavity is discharged from the humidifier 12 and then passed into the second pipeline 2.

[0048] In some embodiments, the gas supply cavity and the humidification cavity are separated by a material or device that allows water to pass but prevents gas from passing. For example, the gas supply cavity and the humidification cavity are separated by a hydrophilic membrane or a reverse osmosis membrane.

[0049] like Figure 1 As shown, in some embodiments, the air inlet and outlet device includes a filter 13, a flow meter 14 and an air compressor 15 arranged on the first pipeline 1, and the filter 13, the flow meter 14, the air compressor 15 and the humidifier 12 are arranged in sequence on the first pipeline 1 along the air flow direction in the first pipeline 1. That is, the air entering the first pipeline 1 passes through the filter 13, the flow meter 14, the air compressor 15 and the humidifier 12 in sequence and then passes into the fuel cell stack 6. The filter 13 can filter impurities in the air entering the first pipeline 1. The flow meter 14 is used to monitor the flow rate of the air in the first pipeline 1. The air compressor 15 is used to compress and pressurize the air in the first pipeline 1. The pressurized air is passed into the humidifier 12 to increase the humidity so as to meet the reaction requirements of the fuel cell stack 6.

[0050] In some embodiments, a back pressure throttle valve 22 is provided on the second pipeline 2. Specifically, the back pressure throttle valve 22 is a device for controlling the back pressure in the exhaust system (the second pipeline 2).

[0051] The air inlet and outlet device includes a purge pipeline 23, the inlet of the purge pipeline 23 is connected to the first pipeline 1, and the inlet of the purge pipeline 23 is located between the humidifier 12 and the outlet of the first pipeline 1 on the first pipeline 1. The outlet of the purge pipeline 23 is connected to the second pipeline 2, and the outlet of the purge pipeline 23 is located between the inlet of the second pipeline 2 and the back pressure throttle 22 on the second pipeline 2. The purge throttle 24 is provided on the purge pipeline 23. The purge throttle 24 is a device for controlling the back pressure in the exhaust system (purge pipeline 23), and the air inlet 61 of the electric propulsion 6 requires air with a preset pressure to enter. Therefore, when it is necessary to purge the air inlet and outlet device, the purge throttle 24 is opened so that the air enters the purge pipeline 23 after passing through the filter 13, the flow meter 14, the air compressor 15 and the humidifier 12 in sequence, and then enters the second pipeline 2 and is discharged through the back pressure throttle 22, so as to purge the air inlet and outlet device.

[0052] like Figure 1 As shown, a plurality of hydrogen inlet and outlet devices are matched with a plurality of fuel cell stacks 6 in a one-to-one correspondence, and each hydrogen inlet and outlet device includes a third pipeline 3 , a fourth pipeline 4 and a steam-water separator 41 .

[0053] The inlet of the third pipeline 3 is used to pass hydrogen, the outlet of the third pipeline 3 is connected to the hydrogen inlet 63 of the corresponding stack 6, and the inlet of the fourth pipeline 4 is connected to the hydrogen outlet 64 of the corresponding stack 6. The outlet of the fourth pipeline 4 is connected to the (inlet of) steam-water separator 41, and the steam-water separator 41 is used to separate water and gas. The gas outlet of the steam-water separator 41 is used to discharge hydrogen, and a steam trap 42 is provided on the water outlet of the steam-water separator 41, and the steam trap 42 can adjust the drainage flow of the water outlet of the steam-water separator 41. Each stack 6 is equipped with a hydrogen inlet and outlet device separately so that the hydrogen supply is sufficient. And each stack 6 has a separately equipped steam trap 42. Therefore, when the voltage of the stack 6 is higher or lower, the drainage flow of the corresponding steam trap 42 can be adjusted to affect the amount of water after the reaction in the stack 6, so as to affect the reaction ring in the stack 6, and then affect the voltage of the stack 6.

[0054] like Figure 1As shown, in some embodiments, each hydrogen inlet and outlet device includes an ejector 31. The ejector 31 is arranged on the third pipeline 3, and the gas outlet of the steam-water separator 41 is connected to the ejection cavity of the ejector 31. The ejector 31 is used to eject the hydrogen discharged from the gas outlet of the steam-water separator 41 into the third pipeline 3. Specifically, the ejector 31 can save energy as a driver. The fluid passing through the ejector 31 in the third pipeline 3 is a high-speed fluid. When the hydrogen in the third pipeline 3 passes into the throat of the ejector, the speed increases and the pressure decreases, thereby generating suction to absorb the hydrogen discharged from the gas outlet of the steam-water separator 41. Thereby, the unreacted hydrogen discharged from the hydrogen outlet 64 can be passed into the third pipeline 3 again to supply the fuel cell stack 6.

[0055] like Figure 1 As shown, in some embodiments, an isolation valve 32 is provided at the inlet of the third pipeline 3 (each hydrogen inlet and outlet device), and the inlet of the third pipeline 3 is connected to the hydrogen storage cylinder group 33. Therefore, after the isolation valve 32 is opened, the hydrogen in the hydrogen storage cylinder group 33 can be passed into the third pipeline 3.

[0056] The outlet of the drain valve 42 is connected to the second pipeline 2 through the drain pipeline 43 . The connection point between the outlet of the drain pipeline 43 and the second pipeline 2 is adjacent to the outlet of the second pipeline 2 . A muffler 44 is provided at the outlet of the second pipeline 2 .

[0057] like Figure 1 As shown, the cooling device includes a cooling pipeline 5, a water pump 58 and a temperature regulating device.

[0058] The temperature regulating device is used to regulate the temperature of the coolant (water) in the cooling pipeline 5. The water pump 58 is arranged on the cooling pipeline 5. The outlet of the cooling pipeline 5 is connected to the cooling inlet 65 of the plurality of fuel cell stacks 6 in one-to-one correspondence through the plurality of first sub-cooling pipelines 51. The inlet of the cooling pipeline 5 is connected to the cooling outlet 66 of the plurality of fuel cell stacks 6 in one-to-one correspondence through the plurality of second sub-cooling pipelines 52. In this way, the coolant in the cooling pipeline 5 can be passed into the fuel cell stack 6 for heat exchange after passing through the fuel cell stack 6, and then passed into the fuel cell stack 6 for heat exchange after being regulated by the temperature regulating device.

[0059] like Figure 1 As shown, in some embodiments, the cooling device includes an expansion water tank 81, the outlet of the expansion water tank 81 is connected to the cooling pipeline 5, the expansion water tank 81 is used to replenish water to the cooling pipeline 5, and the outlet of the expansion water tank 81 is located between the temperature regulating device and the water pump 58 on the cooling pipeline 5. Specifically, the expansion water tank 81 can accommodate the expansion of the water volume in the cooling pipeline 5 due to temperature changes, thereby protecting the system from excessive pressure and damage. When the cooling pipeline 5 is damaged, the expansion water tank 81 can replenish water into the cooling pipeline 5.

[0060] In some embodiments, a particle filter 59 is provided on the cooling line 5, and the temperature adjustment device, the outlet of the expansion water tank 81, the water pump 58 and the particle filter 59 are sequentially arranged on the cooling line 5 in a direction away from the outlet of the cooling line 5. That is, in the extension direction of the cooling line 5, the coolant in the cooling line 5 can sequentially pass through the positions of the temperature adjustment device, the outlet of the expansion water tank 81, the water pump 58 and the particle filter 59. The particle filter 59 can filter the particulate matter in the cooling line 5.

[0061] like Figure 1 As shown, in some embodiments, a portion of the cooling pipeline 5 is a heating pipeline 56 and a heat dissipation pipeline 57 arranged in parallel. The temperature regulating device includes a temperature control valve 53, a heater 54 and a radiator 55. The inlet of the temperature control valve 53 is connected with the outlet of the heat dissipation pipeline 57 and the outlet of the heating pipeline 56. The heater 54 is arranged on the heating pipeline 56, and the radiator 55 is arranged on the heat dissipation pipeline 57. Specifically, the heating pipeline 56 and the heat dissipation pipeline 57 are arranged in parallel, and the coolant in the main pipeline of the cooling pipeline 5 can be passed into the heating pipeline 56 and the heat dissipation pipeline 57. The heater 54 can increase the temperature of the coolant in the heating pipeline 56, and the radiator 55 can reduce the temperature of the coolant in the heat dissipation pipeline 57. The coolant in the heating pipeline 56 and the heat dissipation pipeline 57 can be passed into the temperature control valve 53 and mixed, so that the temperature of the coolant discharged from the temperature control valve 53 is the required temperature. For example, the heater 54 is an electric heater, and the radiator 55 includes a fan module.

[0062] like Figure 1 As shown, in some embodiments, the second sub-cooling pipeline 52 is connected to (the inlet of) the first exhaust pipeline 82, the outlet of the first exhaust pipeline 82 is connected to the inlet of the expansion water tank 81, and a deionization tank 83 is provided on the first exhaust pipeline 82. Specifically, at least part of the first exhaust pipeline 82 is located above the battery stack 6 and the expansion water tank 81, and the gas (with water vapor) in the second sub-cooling pipeline 52 can be passed into the first exhaust pipeline 82, and the water vapor can be passed into the expansion water tank 81 after the ions in the water are removed by the deionization tank 83.

[0063] The heat dissipation pipeline 57 is in communication with (the inlet of) the second exhaust pipeline 84, the outlet of the second exhaust pipeline 84 is in communication with the inlet of the expansion water tank 81, and the inlet of the second exhaust pipeline 84 is located between the radiator 55 and the outlet of the heat dissipation pipeline 57 on the heat dissipation pipeline 57. Specifically, at least part of the second exhaust pipeline 84 is located above the heat dissipation pipeline 57 and the expansion water tank 81, and the water vapor in the gas in the heat dissipation pipeline 57 can pass into the expansion water tank 81.

[0064] like Figure 1As shown, in some embodiments, the humidifier 12 has a heat exchange cavity. The heat exchange cavity is used to pass a cold fluid to reduce the air temperature in the air supply cavity, and the heat exchange cavity and the air supply cavity can exchange heat. The inlet of the heat exchange cavity is connected to the outlet of the cooling pipeline 5 through the first heat exchange pipeline 16, and a throttling ring 18 is provided on the first heat exchange pipeline 16. The outlet of the heat exchange cavity is connected to the inlet of the cooling pipeline 5 through the second heat exchange pipeline 17. The throttling ring 18 is used to control the flow of the first heat exchange pipeline 16. As a result, the coolant in the cooling pipeline 5 can be passed into the humidifier 12 through the first heat exchange pipeline 16 to cool the air in the first pipeline 1, and the coolant after heat exchange can be passed into the inlet of the cooling pipeline 5 again (the inlet of the heating pipeline 56 and the heat dissipation pipeline 57). For example, the humidifier 12 is an integrated intercooler humidifier.

[0065] like Figure 1 As shown, in some embodiments, the number of the stacks 6 is two, the number of hydrogen inlet and outlet devices is two, and the two hydrogen inlet and outlet devices are matched with the two stacks 6 in a one-to-one correspondence. Specifically, the two stacks 6 share a set of air inlet and outlet devices and a set of cooling devices, and each electric propeller 6 is equipped with a separately set hydrogen inlet and outlet device. The drain valve 42 can adjust the drainage flow rate of the water outlet of the steam-water separator 41 to affect the voltage of the corresponding stack 6. The two ejectors 3 are respectively used to provide a circulating hydrogen supply for the two stacks 6, and the two drain valves 42 are respectively used to discharge the generated water for the two stacks 6. The dual-stack hydrogen system is independently controlled and does not interfere with each other. The drain valve 42 can adjust the discharge time and discharge cycle of the drain valve 42 according to the dry and wet states of the multiple (two) stacks 6, and make the multiple (two) electric propellers 6 in a range with the same dry and wet conditions by the speed of drainage, so as to ensure the consistency of the dual-stack output of the system and improve the stability of the system.

[0066] According to the fuel cell power device of the embodiment of the present invention, a set of air inlet and outlet devices and a set of cooling devices reduce the complexity of the system and improve the system integration. To ensure the consistency of the air intake of multiple stacks 6, the cooling path is controlled by a single water pump to ensure the consistency of the cooling temperature difference of the stack 6, so as to ensure that the stack 6 works under the same operating conditions as much as possible, improve the performance consistency of the stack 6, reduce the attenuation difference of the stack 6, and thus improve the overall reliability of the system.

[0067] The hydrogen inlet and outlet device adopts an ejector 3, which reduces the cost of the system, and the ejector system does not need to be controlled, which reduces the control difficulty of the system's electronic control system. There are multiple, which ensures sufficient supply of hydrogen system fuel. Damage to the stack membrane electrode and system durability degradation caused by anode gas shortage are avoided. The drainage and order systems of multiple stacks 6 are independently controlled and can be flexibly controlled to ensure smooth drainage and improve system reliability. In this way, when each stack works and outputs electricity under stable and consistent process parameters, the number of system components and integration complexity can be reduced as much as possible, and the difficulty of system control and auxiliary power consumption can be reduced.

[0068] Therefore, the fuel cell power device according to the embodiment of the present invention has the advantages of easy control and high reliability.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0074] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A fuel cell power device, characterized in that: include: A plurality of fuel cell stacks, each of the fuel cell stacks having an air inlet, an air outlet, a hydrogen inlet, a hydrogen outlet, a cooling inlet, and a cooling outlet; An air inlet and outlet device, the air inlet and outlet device comprising a first pipeline, a second pipeline and a humidifier, the inlet of the first pipeline is used to let in air, the outlet of the first pipeline is connected to the air inlets of the plurality of battery stacks in a one-to-one correspondence through a plurality of first sub-pipelines, the humidifier is used to increase the air humidity in the first pipeline, the inlet of the second pipeline is connected to the air outlets of the plurality of battery stacks in a one-to-one correspondence through a plurality of second sub-pipelines; A plurality of hydrogen inlet and outlet devices, wherein the plurality of hydrogen inlet and outlet devices are matched with the plurality of the battery stacks in a one-to-one correspondence, each of the hydrogen inlet and outlet devices comprises a third pipeline, a fourth pipeline and a steam-water separator, the inlet of the third pipeline is used to introduce hydrogen, the outlet of the third pipeline is communicated with the hydrogen inlet of the corresponding battery stack, the inlet of the fourth pipeline is communicated with the hydrogen outlet of the corresponding battery stack, the outlet of the fourth pipeline is communicated with the steam-water separator, the gas outlet of the steam-water separator is used to discharge hydrogen, and a steam trap is provided on the water outlet of the steam-water separator, and the steam trap can adjust the drainage flow of the water outlet of the steam-water separator; A cooling device, the cooling device includes a cooling pipeline, a water pump and a temperature regulating device, the temperature regulating device is used to regulate the temperature of the coolant in the cooling pipeline, the water pump is arranged on the cooling pipeline, the outlet of the cooling pipeline is connected to the cooling inlet of the multiple fuel cell stacks in a one-to-one correspondence through a plurality of first sub-cooling pipelines, and the inlet of the cooling pipeline is connected to the cooling outlet of the multiple fuel cell stacks in a one-to-one correspondence through a plurality of second sub-cooling pipelines.

2. The fuel cell power device according to claim 1, characterized in that: The humidifier comprises an air supply cavity and a humidifying cavity, the air supply cavity is connected with the first pipeline, the water vapor in the humidifying cavity can be passed into the air supply cavity so as to increase the air humidity in the air supply cavity, the inlet of the humidifying cavity is connected with the outlets of a plurality of the second sub-pipelines, and the outlet of the humidifying cavity is connected with the second pipeline.

3. The fuel cell power device according to claim 2, characterized in that: The humidifier has a heat exchange cavity, which is used to pass cold fluid to reduce the air temperature in the air supply cavity. The inlet of the heat exchange cavity is connected to the outlet of the cooling pipeline through a first heat exchange pipeline. A throttling ring is provided on the first heat exchange pipeline. The outlet of the heat exchange cavity is connected to the inlet of the cooling pipeline through a second heat exchange pipeline.

4. The fuel cell power device according to claim 1, characterized in that: The air inlet and outlet device includes a filter, a flow meter and an air compressor arranged on the first pipeline. The filter, the flow meter, the air compressor and the humidifier are arranged in sequence on the first pipeline along the air flow direction in the first pipeline.

5. The fuel cell power device according to claim 4, characterized in that: A back pressure throttle valve is provided on the second pipeline; The air inlet and outlet device includes a purge pipeline, the inlet of the purge pipeline is connected to the first pipeline, the inlet of the purge pipeline is located between the humidifier and the outlet of the first pipeline on the first pipeline, the outlet of the purge pipeline is connected to the second pipeline, the outlet of the purge pipeline is located between the inlet of the second pipeline and the back pressure throttle on the second pipeline, and a purge throttle is provided on the purge pipeline.

6. The fuel cell power device according to claim 1, characterized in that: Each of the hydrogen inlet and outlet devices includes an ejector, which is arranged on the third pipeline. The gas outlet of the steam-water separator is connected to the ejection cavity of the ejector. The ejector is used to eject the hydrogen discharged from the gas outlet of the steam-water separator into the third pipeline.

7. The fuel cell power device according to claim 6, characterized in that: An isolation valve is provided at the inlet of the third pipeline, and the inlet of the third pipeline is connected to the hydrogen storage cylinder group; The outlet of the drain valve is connected to the second pipeline through a drain pipeline. The connection point between the outlet of the drain pipeline and the second pipeline is adjacent to the outlet of the second pipeline. A muffler is provided at the outlet of the second pipeline.

8. The fuel cell power device according to claim 1, characterized in that: The cooling device comprises an expansion water tank, the outlet of which is in communication with the cooling pipeline, the expansion water tank is used to replenish water to the cooling pipeline, and the outlet of the expansion water tank is located between the temperature regulating device and the water pump on the cooling pipeline.

9. The fuel cell power device according to claim 8, characterized in that: A particle filter is provided on the cooling pipeline, and the temperature regulating device, the outlet of the expansion water tank, the water pump and the particle filter are arranged in sequence on the cooling pipeline in a direction away from the outlet of the cooling pipeline; A portion of the cooling pipeline is a heating pipeline and a heat dissipation pipeline arranged in parallel; The temperature regulating device comprises a temperature control valve, a heater and a radiator, the inlet of the temperature control valve is connected with the outlet of the heat dissipation pipeline and the outlet of the heating pipeline, the heater is arranged on the heating pipeline, and the radiator is arranged on the heat dissipation pipeline; The second sub-cooling pipeline is in communication with the first exhaust pipeline, the outlet of the first exhaust pipeline is in communication with the inlet of the expansion water tank, and a deionization tank is provided on the first exhaust pipeline; The heat dissipation pipeline is communicated with the second exhaust pipeline, the outlet of the second exhaust pipeline is communicated with the inlet of the expansion water tank, and the inlet of the second exhaust pipeline is located on the heat dissipation pipeline between the radiator and the outlet of the heat dissipation pipeline.

10. The fuel cell power device according to any one of claims 1 to 9, characterized in that: There are two battery stacks, and there are two hydrogen inlet and outlet devices, and the two hydrogen inlet and outlet devices are matched with the two battery stacks in a one-to-one correspondence; The steam trap can affect the voltage of the corresponding fuel cell stack by adjusting the drainage flow rate of the water outlet of the steam-water separator; Each of the battery stacks has a patrol device coordinated therewith, and the patrol device is used to monitor the voltage of the corresponding battery stack; A hydrogen concentration detector is provided in the box of each of the fuel cell stacks, and the hydrogen concentration detector is used to monitor the hydrogen leakage in the corresponding fuel cell stack; A pressure sensor and a temperature sensor are provided at the air inlet, the air outlet, the hydrogen inlet, the hydrogen outlet, the cooling inlet and the cooling outlet of each fuel cell stack.

Images