Fuel cell system, fuel cell and vehicle

Abstract

The invention discloses a fuel cell system, a cell and a vehicle. The fuel cell system comprises an air compressor, an intercooler, an electric pile assembly and a bypass pipeline, a first channel and a second channel which are arranged at an interval are arranged in the intercooler, a first inlet of the first channel is communicated with the compression end of the air compressor, and a first outlet of the first channel is communicated with a second inlet of the electric pile assembly; a third inlet of the second channel is communicated with a second outlet of the electric pile assembly, a third outlet of the second channel is communicated with the expansion end of the air compressor, one end of the bypass pipeline is communicated with a first outlet of the first channel, and the other end of the bypass pipeline is communicated with the third inlet of the second channel. According to the fuel cell system, the bypass pipeline is arranged between the first channel and the second channel, so that part of the first gas output by the first channel can be guided into the second channel, the second gas in the second channel is heated by utilizing the first gas with relatively high temperature, and the energy utilization rate of the fuel cell system can be improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a fuel cell system, a fuel cell, and a vehicle. Background Art

[0002] As people's awareness of environmental protection gradually increases, the application of fuel cells has become increasingly widespread. Fuel cells include fuel cell stacks, air compressors, intercoolers and humidifiers. The air compressor is the core component of the fuel cell system and can provide the fuel cell stack with the required specific flow and pressure of air.

[0003] In a fuel cell system based on related technologies, the gas compressed by the compressor's compression end is cooled by an intercooler before entering the fuel cell stack for a reaction. The exhaust gas flowing out of the fuel cell stack after the reaction is then transported back to the compressor's expansion end for recycling. However, due to the relatively low temperature of the exhaust gas transported to the expansion end, the compressor requires a high power consumption. The heat from the compressed gas is removed by the coolant in the intercooler but is not fully utilized, resulting in energy waste. Summary of the Invention

[0004] The present application aims to provide a fuel cell system, a fuel cell and a vehicle, which can solve the problem in the related art that the heat of the high-temperature gas compressed by the air compressor is not fully utilized.

[0005] In order to solve the above technical problems, this application is implemented as follows: In a first aspect, an embodiment of the present application provides a fuel cell system, comprising: an air compressor, an intercooler, a fuel cell stack assembly, and a bypass line; The intercooler is provided with a first channel and a second channel arranged at intervals, a first inlet of the first channel is communicated with the compression end of the air compressor, and a first outlet of the first channel is communicated with the second inlet of the fuel cell stack assembly; The third inlet of the second channel is connected to the second outlet of the fuel cell assembly, the third outlet of the second channel is connected to the expansion end of the air compressor, one end of the bypass line is connected to the first outlet of the first channel, and the other end of the bypass line is connected to the third inlet of the second channel.

[0006] Optionally, the intercooler includes a main body and an integrated part that are connected to each other, the first channel and the second channel are provided in the main body, and a third channel is provided in the integrated part; one end of the third channel is connected to the first outlet of the first channel, and the other end of the third channel is connected to the third inlet of the second channel to form the bypass line.

[0007] Optionally, a hollow cavity is provided in the main body, a partition is provided in the hollow cavity, and the partition separates the hollow cavity into the first channel and the second channel.

[0008] Optionally, the partition is a heat-conducting partition.

[0009] Optionally, the fuel cell system also includes a control valve having an input end and two output ends, the input end is connected to the first outlet of the first channel, the second inlet of the stack assembly is connected to one of the output ends, and the end of the third channel away from the second channel is connected to the other output end.

[0010] Optionally, the intercooler further includes a cooling pipe, which is at least partially disposed in the first channel. The cooling pipe is used to circulate a coolant to cool the gas flowing through the first channel by the coolant.

[0011] Optionally, the fuel cell system also includes a first regulating valve, which is arranged between the second outlet of the fuel cell stack assembly and the third inlet of the second channel. One end of the first regulating valve is connected to the second outlet of the fuel cell stack assembly, and the other end of the first regulating valve is connected to the third inlet of the second channel, for regulating the intake amount at the third inlet of the second channel.

[0012] Optionally, the fuel cell system also includes a second regulating valve, which is arranged between the compression end of the air compressor and the first inlet of the first channel, one end of the second regulating valve is connected to the compression end of the air compressor, and the other end of the second regulating valve is connected to the first inlet of the first channel, for adjusting the intake amount at the first inlet of the first channel.

[0013] In a second aspect, an embodiment of the present application proposes a fuel cell, comprising a fuel cell system as described in any one of the above items.

[0014] In a third aspect, an embodiment of the present application proposes a vehicle comprising the fuel cell described above.

[0015] In an embodiment of the present application, a first channel and a second channel are provided in the intercooler, and a first inlet of the first channel is connected to the compression end of the air compressor. External gas is compressed by the compression end to form compressed gas. The compressed gas flows through the first channel of the intercooler and flows out of the first outlet to form the first gas. The first gas then flows into the fuel cell assembly, reacts, and discharges the second gas with a relatively low temperature. The third inlet of the second channel is connected to the fuel cell assembly so that the second gas flowing out of the fuel cell assembly flows into the second channel. A bypass line is provided between the first outlet of the first channel and the third inlet of the second channel. In this way, part of the first gas output from the first channel can be directed into the second channel, so that the higher temperature first gas and the lower temperature second gas are mixed in the second channel to form a mixed gas with a relatively moderate temperature. The third outlet of the second channel is connected to the expansion end of the air compressor to guide the mixed gas in the second channel to the expansion end of the air compressor. This can increase the temperature of the gas entering the expansion end, thereby increasing the expansion work of the expansion end, thereby not only improving the efficiency of the fuel cell system, but also realizing energy recovery and utilization of the first gas, thereby improving the energy utilization rate of the fuel cell system.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is one of the structural schematic diagrams of a fuel cell system according to an embodiment of the present application; Figure 2 This is a second structural diagram of a fuel cell system according to an embodiment of the present application; Figure 3 2 is a schematic structural diagram of an intercooler according to an embodiment of the present application.

[0018] Reference numerals: 100: air compressor; 110: compression end; 120: expansion end; 200: intercooler; 210: main body; 211: first channel; 2111: first inlet; 2112: first outlet; 220: second channel; 2211: third inlet; 2212: third outlet; 221: bypass line; 222: third channel; 230: partition; 240: cooling pipe; 250: integrated part; 300: fuel cell stack assembly; 310: humidifier; 311: second inlet; 312: second outlet; 400: fuel cell stack; 500: control valve; 510: first regulating valve; 520: second regulating valve; 600: air filter; 700: water separator; 810: flow detection element; 820: control element; 830: temperature detection element. DETAILED DESCRIPTION

[0019] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0021] In the description of the present application, 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0023] The fuel cell system, fuel cell, and vehicle provided in the embodiments of the present application are described in detail below with reference to specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0024] like Figure 1 and Figure 3 As shown, according to some embodiments of the present application, the fuel cell system includes: an air compressor 100, an intercooler 200, a fuel cell stack assembly 300, and a bypass line 221; the intercooler 200 is provided with a first channel 211 and a second channel 220 arranged at intervals, the first inlet 2111 of the first channel 211 is connected to the compression end 110 of the air compressor 100, and the first outlet 2112 of the first channel 211 is connected to the second inlet 311 of the fuel cell stack assembly 300; the third inlet 2211 of the second channel 220 is connected to the second outlet 312 of the fuel cell stack assembly 300, and the third outlet 2212 of the second channel 220 is connected to the expansion end 120 of the air compressor 100, one end of the bypass line 221 is connected to the first outlet 2112 of the first channel 211, and the other end of the bypass line 221 is connected to the third inlet 2211 of the second channel 220, so as to introduce part of the first gas output from the first channel 211 into the second channel 220.

[0025] In the embodiment of the present application, a first channel 211 and a second channel 220 are provided in the intercooler 200, and the first inlet 2111 of the first channel 211 is connected to the compression end 110 of the air compressor 100. The external gas is compressed by the compression end 110 to form a compressed gas. The compressed gas flows out from the first outlet 2112 after passing through the first channel 211 of the intercooler 200 to form a first gas. The first gas then flows into the fuel cell assembly 300 to react and then discharges a second gas with a relatively low temperature; the third inlet 2211 of the second channel 220 is connected to the fuel cell assembly 300 so that the second gas flowing out of the fuel cell assembly 300 flows into the second channel 220; and at the first outlet 2112 of the first channel 211 and the second channel 220, A bypass line 221 is provided between the third inlet 2211, so that part of the first gas output from the first channel 211 can be introduced into the second channel 220, so that the first gas with a higher temperature is mixed with the second gas with a lower temperature in the second channel 220 to form a mixed gas with a relatively moderate temperature, and then the third outlet 2212 of the second channel 220 is connected to the expansion end 120 of the air compressor 100, so as to guide the mixed gas in the second channel 220 to the expansion end 120 of the air compressor 100, which can increase the temperature of the gas entering the expansion end 120, thereby increasing the expansion work of the expansion end 120, thereby not only improving the efficiency of the fuel cell system, but also realizing the energy recovery and utilization of the first gas, thereby improving the energy utilization rate of the fuel cell system.

[0026] In addition, the temperature of the mixed gas entering the expansion end 120 is increased, which can vaporize the moisture in the gas and reduce the water entering the expansion end 120, thereby improving the safety of the air compressor 100 and extending its service life; at the same time, in the embodiment of the present application, the bypass line 221 is used to introduce part of the first gas flowing out of the first channel 211 into the second channel 220, and the first gas can also be used to dilute the second gas discharged from the stack assembly 300, reducing the hydrogen concentration in the exhaust gas, thereby improving the safety of the fuel cell system operation.

[0027] It should be noted that the compression end 110 and expansion end 120 of the air compressor 100 are connected via a coaxial rigid connection or a gear train coupling to form an integrated compression-expansion structure. The compression end 110 converts mechanical energy into the pressure and kinetic energy of the gas, reducing the gas volume to increase the gas pressure and temperature accordingly; the expansion end 120 expands the high-pressure gas in the opposite direction to a low-pressure state. When the temperature of the gas entering the expansion end 120 increases, the expansion work increases, and the energy recovered by the expansion end 120 increases. At this time, the air compressor 100 does not require more external energy to drive the compression end 110 to perform work, thereby reducing the energy consumption of the air compressor 100.

[0028] In some embodiments, the stack assembly 300 includes a humidifier 310 and a stack 400, the inlet of the humidifier 310 is connected to the first channel 211, the outlet of the humidifier 310 is connected to the inlet of the stack 400, and the outlet of the stack 400 is connected to the second channel 220, wherein the inlet of the humidifier 310 is the second inlet 311, the outlet of the stack 400 is the second outlet 312, the air compressor 100 has a compression end 110 and an expansion end 120, and the compression end 110 is coaxially connected to the expansion end 120; the intercooler 200 is provided with a first channel 211 and a second channel 220 arranged at intervals, the first inlet 2111 of the first channel 211 is connected to the compression end 110, and the first inlet 2111 of the first channel 211 is connected to the compression end 110, and the second inlet 2111 of the first channel 211 is connected to the compression end 110. An outlet 2112 is connected to the second inlet 311 of the humidifier 310, and the humidifier 310 is connected to the fuel cell stack 400, so that the compressed gas compressed at the compression end 110 can enter the first channel 211 of the intercooler 200 to be cooled to form a first gas. After entering the humidifier 310, the first gas enters the inlet of the fuel cell stack 400; the third inlet 2211 of the second channel 220 is connected to the second outlet 312 of the humidifier 310, and the third outlet 2212 of the second channel 220 is connected to the expansion end 120 of the air compressor 100, so that the second gas discharged from the fuel cell stack 400 flows through the humidifier 310 and the second channel 220 of the intercooler 200 in sequence and then enters the expansion end 120 of the air compressor 100.

[0029] It should be noted that the external gas is compressed by the air compressor 100 to form compressed gas, and the compressed gas enters the first channel 211 of the intercooler 200 and is cooled to form the first gas; after the first gas passes through the intercooler 200 and the fuel cell assembly 300 in turn, the gas generated after the reaction in the fuel cell assembly 300 is discharged from the fuel cell assembly 300 and then enters the second channel 220 through the humidifier 310. The gas at this time has a lower temperature than the first gas, and is referred to as the second gas. In the second channel 220, the first gas and the second gas are mixed to form a mixed gas with a relatively moderate temperature, which also realizes the use of the higher temperature first gas to heat the lower temperature second gas.

[0030] In some embodiments, the fuel cell system also includes an air filter 600, the output end of the air filter 600 is connected to the compression end 110 of the air compressor 100, and the air filter 600 can filter out dust, particles and other impurities in the air to prevent blockage of the gas flow channel of the compression end 110 in the air compressor 100, thereby improving the stability of the fuel cell system operation and extending the service life of the fuel cell.

[0031] In some other embodiments, the fuel cell system further includes a water separator 700, which is arranged between the second outlet 312 of the humidifier 310 and the third inlet 2211 of the intercooler 200. One end of the water separator 700 is connected to the third inlet 2211 of the intercooler 200, and the other end of the water separator 700 is connected to the second outlet 312 of the humidifier 310. The second gas discharged from the humidifier 310 contains moisture. The water separator 700 can separate the moisture in the second gas so that the dry second gas flows into the intercooler 200 and the air compressor 100, thereby preventing the moisture from affecting the components in the fuel cell and improving the safety and stability of the operation of the fuel cell system. Alternatively, as Figure 3 As shown, the intercooler 200 includes a main body 210 and an integrated part 250 that are connected to each other. The main body 210 is provided with a first channel 211 and a second channel 220, and the integrated part 250 is provided with a third channel 222; one end of the third channel 222 is connected to the first outlet 2112 of the first channel 211, and the other end of the third channel 222 is connected to the third inlet 2211 of the second channel 220 to form a bypass line 221.

[0032] In the embodiment of the present application, an integrated portion 250 is provided on the main body 210, and a third channel 222 is provided in the integrated portion 250. One end of the third channel 222 communicates with the first outlet 2112 of the first channel 211, and the other end of the third channel 222 communicates with the third inlet 2211 of the second channel 220, thereby forming a bypass line 221. The provision of the integrated portion 250 not only reduces the number of pipelines used in the fuel cell system, thereby lowering production costs and simplifying installation and maintenance, but also makes the intercooler 200 more compact, thereby reducing the intercooler's space utilization.

[0033] Alternatively, as Figure 1 As shown, the fuel cell system also includes a control valve 500, which has an input end and two output ends. The input end is connected to the first outlet 2112 of the first channel 211, the second inlet 311 of the stack assembly 300 is connected to one of the output ends, and the third channel 222 is connected to the other output end at one end away from the second channel 220.

[0034] In an embodiment of the present application, by providing a control valve 500 having one input end and two output ends, the opening and closing of the passage between the first outlet 2112 of the first passage in the intercooler 200 and the second inlet 311 of the fuel cell assembly 300, as well as the opening and closing of the passage between the first outlet 2112 of the first passage and the third inlet 2211 of the second passage can be flexibly regulated; at the same time, the provision of the control valve 500 can not only save installation space, but also simplify the structure of the fuel cell system, providing convenience for the installation and maintenance of the fuel cell system.

[0035] In some embodiments, the control valve 500 may be integrated on the intercooler 200 so that the control valve 500 and the intercooler 200 form an integrated structure, which not only facilitates assembly and use but also improves the overall structural compactness.

[0036] Optionally, the control valve 500 is an electrically controlled three-way valve.

[0037] In the embodiment of the present application, by setting the control valve 500 as an electrically controlled three-way valve, precise control of the gas flow direction and flow rate can be achieved. In addition, the electrically controlled three-way valve has a fast response speed, which can also improve the stability and efficiency of the fuel cell system.

[0038] Alternatively, as Figure 3 As shown, a hollow cavity is provided in the main body 210, and a partition 230 is provided in the hollow cavity. The partition 230 separates the hollow cavity into a first channel 211 and a second channel 220; the gas flowing through the first channel 211 can exchange heat with the gas flowing through the second channel 220 through the partition 230.

[0039] In an embodiment of the present application, by arranging a partition 230 in the hollow cavity of the main body 210, the hollow cavity can be separated into a first channel 211 and a second channel 220, so that the first channel 211 is connected to the compression end 110 of the air compressor 100, and the second channel 220 is connected to the expansion end 120 of the air compressor 100. This method of separating the main body 210 into the first channel 211 and the second channel 220 by a partition has a simple structure and is easy to install, disassemble and maintain.

[0040] Among them, the partition 230 can be made of a heat-conducting material. By selecting a heat-conducting material as the partition 230, the compressed gas in the first channel 211 can exchange heat with the mixed gas in the second channel 220 through the partition 230, so that the higher temperature compressed gas in the first channel 211 can be used to heat the mixed gas in the second channel 220, thereby increasing the temperature of the gas entering the expansion end 120 through the second channel 220, thereby increasing the expansion work output from the expansion end 120 to the compression end 110, and realizing an improvement in the energy utilization rate in the fuel cell system.

[0041] In addition, the mixed gas with a lower temperature in the second channel 220 can be used to assist in cooling the compressed gas in the first channel 211. This not only reduces the energy consumption of the intercooler 200, but also further improves the energy utilization rate in the fuel cell system.

[0042] It should also be noted that the thermal conductive material can be a polymer composite material or a metal material, etc. The specific type of the thermal conductive material can be flexibly selected according to the actual process, and this embodiment does not limit it.

[0043] Among them, polymer composite materials have excellent thermal conductivity, corrosion resistance and mechanical strength, which help to improve the service life of fuel cells; metal materials have the advantages of high thermal conductivity, high temperature stability and low cost, which can reduce the production cost of fuel cells.

[0044] Alternatively, as Figure 3 As shown, the intercooler 200 further includes a cooling pipe 240 . The cooling pipe 240 is at least partially disposed in the first channel 211 . The cooling pipe 240 is used to circulate coolant to cool the gas flowing through the first channel 211 by the coolant.

[0045] In an embodiment of the present application, a cooling pipe 240 is provided in the intercooler 200, so that after the higher-temperature compressed gas generated by the air compressor 100 enters the first channel 211, the coolant in the cooling pipe 240 is used to cool the higher-temperature compressed gas entering the first channel 211 to obtain a cooled first gas. That is, before the compressed gas enters the fuel cell stack 400, the temperature of the compressed gas is first adjusted to a preset temperature, so as to better meet the process requirements of the fuel cell stack 400.

[0046] Specifically, the cooling pipe 240 at least partially extends into the first channel 211, and the cooling pipe 240 is connected to the intercooler 200 by welding, threaded connection or clamping; in addition, a coolant inlet is provided at the first inlet 2111 of the intercooler 200 near the first channel 211, and a coolant outlet is provided at the first outlet 2112 of the intercooler 200 near the first channel 211. The coolant inlet and the coolant outlet are connected to the cooling pipe 240, and the coolant enters the first channel 211 through the coolant inlet. The coolant flows in the cooling pipe 240 and exchanges heat with the compressed gas entering the first channel 211 to adjust the temperature of the compressed gas to a preset temperature. The coolant finally flows out from the coolant outlet.

[0047] It is understandable that the connection method between the cooling pipe 240 and the intercooler 200 can be flexibly set according to actual process requirements, and this embodiment does not limit it.

[0048] It should be noted that the external gas is compressed by the compression end 110 of the air compressor 100 to form compressed gas. The temperature of the compressed gas is relatively high. After the compressed gas enters the first channel 211, it is cooled by the coolant in the cooling tube 240 to form a first gas. After the first gas passes through the fuel cell assembly 300, it reacts to form a second gas. The temperature of the second gas is lower than that of the first gas, that is, the temperature of the compressed gas > the temperature of the first gas > the temperature of the second gas.

[0049] It should also be noted that the cooling pipe 240 in the first channel 211 can be designed as a spiral or serpentine shape to increase the contact time and contact area between the coolant and the compressed gas entering the first channel 211, thereby improving the heat exchange efficiency.

[0050] Alternatively, as Figure 1 As shown, the fuel cell system also includes a first regulating valve 510, which is arranged between the second outlet 312 of the fuel cell stack assembly 300 and the third inlet 2211 of the second channel 220. One end of the first regulating valve 510 is connected to the second outlet 312 of the fuel cell stack assembly 300, and the other end of the first regulating valve 510 is connected to the third inlet 2211 of the second channel 220, and is used to adjust the intake amount at the third inlet 2211 of the second channel 220.

[0051] In an embodiment of the present application, by setting a first regulating valve 510 between the second outlet 312 of the fuel cell stack assembly 300 and the third inlet 2211 of the second channel 220, the flow of the second gas entering the second channel 220 from the fuel cell stack assembly 300 can be adjusted, thereby optimizing the exhaust performance of the fuel cell system and improving the stability of the fuel cell system.

[0052] Alternatively, as Figure 1 As shown, the fuel cell system also includes a second regulating valve 520, which is arranged between the compression end 110 of the air compressor 100 and the first inlet 2111 of the first channel 211. One end of the second regulating valve 520 is connected to the compression end 110 of the air compressor 100, and the other end of the second regulating valve 520 is connected to the first inlet 2111 of the first channel 211, and is used to adjust the intake amount at the first inlet 2111 of the first channel 211.

[0053] In an embodiment of the present application, by setting a second regulating valve 520 between the compression end 110 of the air compressor 100 and the first inlet 2111 of the first channel 211, the flow rate of the compressed gas input from the compression end 110 to the first channel 211 can be adjusted to maintain the pressure stability between the air compressor 100 and the intercooler 200, avoid excessive pressure of the compressed gas entering the intercooler 200, and cause pressure shock to the intercooler 200, thereby ensuring the operating stability and reliability of the intercooler 200 and improving the service life of the intercooler 200.

[0054] Alternatively, as Figure 2 As shown, the fuel cell system also includes a flow detection component 810 and a control component 820; the flow detection component 810 is arranged at the inlet of the compression end 110, and is used to detect the intake air volume of the compression end 110; the control component 820 is electrically connected to the control valve 500, the first regulating valve 510, the second regulating valve 520 and the flow detection component 810 respectively, and the control component 820 is used to control the operation of the control valve 500, the first regulating valve 510 and the second regulating valve 520 respectively based on the intake air volume of the compression end 110.

[0055] In an embodiment of the present application, a flow detection component 810 is provided at the inlet of the compression end 110, and the control component 820 is electrically connected to the flow detection component 810, the control valve 500, the first regulating valve 510 and the second regulating valve 520, so that the flow detection component 810 can detect the intake air volume at the inlet of the compression end 110, and the control component 820 controls the opening and closing of the first regulating valve 510, the second regulating valve 520 and the control valve 500 according to the intake air volume, thereby realizing the adjustment of the fuel cell system under different working conditions.

[0056] In some embodiments, when the fuel cell system is operating normally, the first regulating valve 510 and the second regulating valve 520 can be controlled to open by the control component 820, and the control component 820 can also control the control valve 500 to connect the first outlet 2112 of the first channel 211 with the second inlet 311 of the fuel cell stack assembly 300, so that the first gas flowing out of the first channel 211 can flow into the fuel cell stack assembly 300; at the same time, the control component 820 can also control the control valve 500 to connect the first outlet 2112 of the first channel 211 with the bypass line 221, so that the first gas flowing out of the first channel 211 flows into the second channel 220 through the bypass line 221, and the heat of the first gas is used to heat the second gas in the second channel 220, so as to increase the temperature of the gas entering the expansion end 120, thereby improving the efficiency of the fuel cell system.

[0057] In some embodiments, when the flow detection component 810 detects that the intake volume at the inlet of the compression end 110 is insufficient and the air compressor 100 surges, the control component 820 controls the control valve 500 to connect the first outlet 2112 of the first channel 211 with the bypass line 221 to increase the gas flow entering the second channel 220, thereby increasing the intake volume of the expansion end 120, allowing more gas to enter the expansion end 120 for expansion and work, thereby alleviating the surge phenomenon of the air compressor 100.

[0058] It should be noted that in actual applications, the fuel cell system in this application can flexibly adjust the working states of the control valve 500, the first regulating valve 510 and the second regulating valve 520 through the control component 820 according to the specific application scenario to meet the requirements of different scenarios.

[0059] Alternatively, as Figure 2 As shown, the fuel cell system also includes a temperature detection component 830, which is arranged at the inlet of the compression end 110 and is used to detect the intake air temperature at the inlet of the compression end 110. The temperature detection component 830 is electrically connected to the control component 820, and the control component 820 is also used to control the operation of the control valve 500, the first regulating valve 510 and the second regulating valve 520 based on the intake air temperature.

[0060] In an embodiment of the present application, a temperature detection component 830 is provided at the inlet of the compression end 110, and the temperature detection component 830 is electrically connected to the control component 820 so that the temperature detection component 830 can detect the intake air temperature at the inlet of the compression end 110. The control component 820 controls the opening and closing of the first regulating valve 510, the second regulating valve 520 and the control valve 500 according to the intake air temperature, thereby realizing the adjustment of the fuel cell system under different working conditions.

[0061] It should be noted that the fuel cell system is suitable for use in vehicles. When the vehicle is started in a low-temperature environment, the low temperature of the gas entering the air compressor 100 causes incomplete hydrogen reaction in the fuel cell stack 400, thereby increasing the hydrogen concentration in the second gas discharged from the fuel cell stack 400, which may affect the safety of the vehicle. To this end, when the temperature detection component 830 detects a low intake air temperature at the inlet of the compression end 110, the control component 820 controls the control valve 500 to connect the first outlet 2112 of the first channel 211 with the bypass line 221. This allows the first gas flowing out of the first channel 211 to dilute the hydrogen concentration in the second gas discharged from the fuel cell stack 400, thereby improving the safety of the vehicle.

[0062] In other embodiments, the fuel cell can be applied to a vehicle, and the control component 820 in the fuel cell system is electrically connected to the central control system of the vehicle. The control component 820 can receive vehicle speed information transmitted by the central control system, and the control component 820 can control the operation of the control valve 500 based on the vehicle speed information. Specifically, when the speed of the vehicle is low, the hydrogen reaction in the fuel cell stack 400 is incomplete, resulting in an increase in the hydrogen concentration in the second gas discharged from the fuel cell stack 400. To this end, the control valve 500 is controlled by the control component 820 to connect the first outlet 2112 of the first channel 211 with the bypass line 221, so that the first gas flowing out of the first channel 211 can be used to reduce the hydrogen concentration in the second gas discharged from the fuel cell stack 400, thereby improving the safety of the vehicle. Optionally, an embodiment of the present application provides a fuel cell, including the fuel cell system as in the above embodiment.

[0063] In the embodiment of the present application, a first channel 211 and a second channel 220 are provided in the intercooler 200, and the first inlet 2111 of the first channel 211 is connected to the compression end 110 of the air compressor 100. The external gas is compressed by the compression end 110 to form a compressed gas. The compressed gas flows out from the first outlet 2112 after passing through the first channel 211 of the intercooler 200 to form a first gas. The first gas then flows into the fuel cell assembly 300 to react and then discharges a second gas with a relatively low temperature; the third inlet 2211 of the second channel 220 is connected to the fuel cell assembly 300 so that the second gas flowing out of the fuel cell assembly 300 flows into the second channel 220; and at the first outlet 2112 of the first channel 211 and the second channel 220, A bypass line 221 is provided between the third inlet 2211, so that part of the first gas output from the first channel 211 can be introduced into the second channel 220, so that the first gas with a higher temperature is mixed with the second gas with a lower temperature in the second channel 220 to form a mixed gas with a relatively moderate temperature, and then the third outlet 2212 of the second channel 220 is connected to the expansion end 120 of the air compressor 100, so as to guide the mixed gas in the second channel 220 to the expansion end 120 of the air compressor 100, which can increase the temperature of the gas entering the expansion end 120, thereby increasing the expansion work of the expansion end 120, thereby not only improving the efficiency of the fuel cell system, but also realizing the energy recovery and utilization of the first gas, thereby improving the energy utilization rate of the fuel cell system.

[0064] Optionally, an embodiment of the present application provides a vehicle comprising the fuel cell in the above embodiment.

[0065] In the embodiment of the present application, a first channel 211 and a second channel 220 are provided in the intercooler 200, and the first inlet 2111 of the first channel 211 is connected to the compression end 110 of the air compressor 100. The external gas is compressed by the compression end 110 to form a compressed gas. The compressed gas flows out from the first outlet 2112 after passing through the first channel 211 of the intercooler 200 to form a first gas. The first gas then flows into the fuel cell assembly 300 to react and then discharges a second gas with a relatively low temperature; the third inlet 2211 of the second channel 220 is connected to the fuel cell assembly 300 so that the second gas flowing out of the fuel cell assembly 300 flows into the second channel 220; and at the first outlet 2112 of the first channel 211 and the second channel 220, A bypass line 221 is provided between the third inlet 2211, so that part of the first gas output from the first channel 211 can be introduced into the second channel 220, so that the first gas with a higher temperature is mixed with the second gas with a lower temperature in the second channel 220 to form a mixed gas with a relatively moderate temperature, and then the third outlet 2212 of the second channel 220 is connected to the expansion end 120 of the air compressor 100, so as to guide the mixed gas in the second channel 220 to the expansion end 120 of the air compressor 100, which can increase the temperature of the gas entering the expansion end 120, thereby increasing the expansion work of the expansion end 120, thereby not only improving the efficiency of the fuel cell system, but also realizing the energy recovery and utilization of the first gas, thereby improving the energy utilization rate of the fuel cell system.

[0066] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means 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 application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0067] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A fuel cell system, characterized in that: include: An air compressor (100), an intercooler (200), a fuel cell assembly (300), and a bypass line (221); The intercooler (200) is provided with a first channel (211) and a second channel (220) arranged at intervals, a first inlet (2111) of the first channel (211) being in communication with the compression end (110) of the air compressor (100), and a first outlet (2112) of the first channel (211) being in communication with the second inlet (311) of the fuel cell stack assembly (300); The third inlet (2211) of the second channel (220) is in communication with the second outlet (312) of the fuel cell assembly (300), the third outlet (2212) of the second channel (220) is in communication with the expansion end (120) of the air compressor (100), one end of the bypass line (221) is in communication with the first outlet (2112) of the first channel (211), and the other end of the bypass line (221) is in communication with the third inlet (2211) of the second channel (220).

2. The fuel cell system according to claim 1, wherein: The intercooler (200) comprises a main body (210) and an integrated part (250) connected to each other, the main body (210) being provided with the first channel (211) and the second channel (220), and the integrated part (250) being provided with a third channel (222); one end of the third channel (222) being in communication with the first outlet (2112) of the first channel (211), and the other end of the third channel (222) being in communication with an end of the second channel (220) close to the third inlet (2211), so as to form the bypass line (221).

3. The fuel cell system according to claim 2, wherein: A hollow cavity is provided in the main body (210), a partition (230) is provided in the hollow cavity, and the partition (230) separates the hollow cavity into the first channel (211) and the second channel (220).

4. The fuel cell system according to claim 3, wherein: The partition (230) is a heat-conducting partition.

5. The fuel cell system according to claim 2, wherein: The fuel cell system further comprises a control valve (500), wherein the control valve (500) has an input end and two output ends, wherein the input end is connected to the first outlet (2112) of the first channel (211), the second inlet (311) of the stack assembly (300) is connected to one of the output ends, and the end of the third channel (222) away from the second channel (220) is connected to the other output end.

6. The fuel cell system according to any one of claims 1 to 5, characterized in that: The intercooler (200) further comprises a cooling pipe (240), wherein the cooling pipe (240) is at least partially disposed in the first channel (211), and the cooling pipe (240) is used to cool the gas flowing through the first channel (211).

7. The fuel cell system according to any one of claims 1 to 5, characterized in that: The fuel cell system further comprises a first regulating valve (510), the first regulating valve (510) being arranged between the second outlet (312) of the fuel cell stack assembly (300) and the third inlet (2211) of the second channel (220), one end of the first regulating valve (510) being in communication with the second outlet (312) of the fuel cell stack assembly (300), and the other end of the first regulating valve (510) being in communication with the third inlet (2211) of the second channel (220), for regulating the amount of air intake at the third inlet (2211) of the second channel (220).

8. The fuel cell system according to any one of claims 1 to 5, characterized in that: The fuel cell system further comprises a second regulating valve (520), the second regulating valve (520) being arranged between the compression end (110) of the air compressor (100) and the first inlet (2111) of the first channel (211), one end of the second regulating valve (520) being in communication with the compression end (110) of the air compressor (100), and the other end of the second regulating valve (520) being in communication with the first inlet (2111) of the first channel (211), for regulating the amount of air intake at the first inlet (2111) of the first channel (211).

9. A fuel cell, characterized in that: Comprising the fuel cell system according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the fuel cell as claimed in claim 9.

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