Tail gas treatment device, fuel cell system and fuel cell automobile

Abstract

The invention discloses a tail gas treatment device, a fuel cell system and a fuel cell automobile, and relates to the technical field of fuel cell automobiles. The tail gas treatment device comprises a gas inlet pipeline, a gas exhaust pipeline and a heat exchange part; the air inlet pipeline outputs compressed air to the electric pile; the exhaust pipeline is communicated with the galvanic pile to output tail gas exhausted by the galvanic pile; the air inlet pipeline is divided into a first air inlet section and a second air inlet section by the heat exchange part, the exhaust pipeline is divided into a first exhaust section and a second exhaust section by the heat exchange part, and a cooling loop is further arranged between the heat exchange part and the electric pile; compressed air is output into the heat exchange part through the first air inlet section and is output to the electric pile through the second air inlet section after exchanging heat with a cooling medium of the cooling loop, and tail gas is output into the heat exchange part through the first exhaust section and exchanges heat with the compressed air, and is output to a tail exhaust pipeline through the second exhaust section. The problems that in the cold environment, moisture in tail gas of a fuel cell automobile is condensed, then tail gas fogging is caused, the driving sight of a rear automobile is hindered, and potential safety hazards are caused are solved.

Description

Technical Field

[0001] The present application relates to the technical field of fuel cell vehicles, and in particular to an exhaust gas treatment device, a fuel cell system and a fuel cell vehicle. Background Art

[0002] A fuel cell is a chemical device that uses hydrogen and oxygen as fuel to convert chemical energy into electrical energy. Its high efficiency and environmentally friendly power generation performance are conducive to the needs of environmental protection.

[0003] During the operation of a fuel cell vehicle equipped with a fuel cell, a chemical reaction occurs between hydrogen and oxygen, causing a large amount of water to be present in the vehicle's exhaust gas. In a cold environment, the saturated vapor pressure of water decreases, and the water in the exhaust gas condenses, causing the exhaust gas to fog, obstructing the driving vision of the following vehicle and posing a driving safety hazard.

[0004] Therefore, the above problems need to be solved urgently. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide an exhaust gas treatment device, a fuel cell system and a fuel cell vehicle to solve the problem that moisture in the exhaust gas of a fuel cell vehicle condenses in a cold environment, thereby causing the exhaust gas to fog, obstructing the driving vision of the following vehicle and posing a driving safety hazard.

[0006] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0007] The first aspect of the present application provides an exhaust gas treatment device, comprising:

[0008] An air intake pipeline outputs compressed air to the fuel cell stack;

[0009] An exhaust pipeline, the exhaust pipeline is connected to the battery stack to output the exhaust gas discharged by the battery stack;

[0010] A heat exchange unit, the heat exchange unit is connected to the output path of the intake pipeline to separate the intake pipeline into a first intake section and a second intake section, and the heat exchange unit is connected to the output path of the exhaust pipeline to separate the exhaust pipeline into a first exhaust section and a second exhaust section, and a cooling circuit is also provided between the heat exchange unit and the fuel cell stack;

[0011] Among them, the compressed air is output to the heat exchange part through the first air intake section and exchanges heat with the cooling medium of the cooling circuit, and then output to the fuel cell stack through the second air intake section. The exhaust gas is output to the heat exchange part through the first exhaust section and exchanges heat with the compressed air, and then output to the tail exhaust pipeline through the second exhaust section.

[0012] In some embodiments, the aforementioned exhaust gas treatment device, wherein the heat exchange portion has a first flow channel, a second flow channel and a third flow channel, the two ends of the first flow channel respectively form a first inlet and a first outlet on the heat exchange portion, the two ends of the second flow channel respectively form a second inlet and a second outlet on the heat exchange portion, and the two ends of the third flow channel respectively form a third inlet and a third outlet on the heat exchange portion; wherein the first inlet is connected to the first air intake section, the first outlet is connected to the second air intake section, the second inlet is connected to the first exhaust section, the second outlet is connected to the second exhaust section, and the third inlet and the third outlet are respectively connected to the two ends of the cooling circuit.

[0013] In some embodiments, the aforementioned exhaust gas treatment device, wherein an air compression component is provided on the first air intake section, the air compression component includes a monitoring module and an air compressor, the air compressor is provided between the monitoring module and the heat exchange part for compressing the gas entering the first air intake section, the monitoring module monitors the temperature flow data of the gas entering the first air intake section to control the compression power of the air compressor.

[0014] In some embodiments, the aforementioned exhaust gas treatment device, wherein a filter component is further disposed on the first air intake section, and the filter component is disposed before the air compression component to filter the gas entering the first air intake section.

[0015] In some embodiments, the aforementioned exhaust gas treatment device, wherein a first valve body is provided on the second air intake section, and the first valve body is used to regulate the flow rate of compressed air output to the fuel cell stack; a second valve body is provided on the first exhaust section, and the second valve body is used to regulate the flow rate of exhaust gas output to the heat exchange part.

[0016] In some embodiments, in the aforementioned exhaust gas treatment device, a first pressure sensor and a temperature sensor are further provided on the second air intake section, and the first pressure sensor and the temperature sensor are provided behind the first valve body.

[0017] In some embodiments, in the aforementioned exhaust gas treatment device, a second pressure sensor is further disposed on the first exhaust section, and the second pressure sensor is disposed in front of the second valve body.

[0018] In some embodiments, in the aforementioned exhaust gas treatment device, a silencer component is further provided on the first exhaust section, and the silencer component is located between the second valve body and the heat exchange part.

[0019] A second aspect of the present application provides a fuel cell system, including a fuel cell stack and the above-mentioned exhaust gas treatment device, wherein the heat exchange part of the exhaust gas treatment device is connected to the fuel cell stack through the second air intake section, the cooling circuit and the first exhaust section respectively.

[0020] A third aspect of the present application provides a fuel cell vehicle, comprising the above-mentioned fuel cell system.

[0021] Through the above technical solution, the exhaust gas treatment device, fuel cell system and fuel cell vehicle provided by the present application have at least the following advantages:

[0022] The first aspect of the present application provides an exhaust gas treatment device, including an intake pipeline, an exhaust pipeline and a heat exchange unit; the intake pipeline outputs compressed air to the fuel cell stack; the exhaust pipeline is connected to the fuel cell stack to output the exhaust gas discharged by the fuel cell stack; the heat exchange unit is connected to the output path of the intake pipeline to separate the intake pipeline into a first intake section and a second intake section, and the heat exchange unit is connected to the output path of the exhaust pipeline to separate the exhaust pipeline into a first exhaust section and a second exhaust section, and a cooling circuit is also provided between the heat exchange unit and the fuel cell stack; wherein, compressed air is output to the heat exchange unit through the first intake section and, after heat exchange with the cooling medium of the cooling circuit, is output to the fuel cell stack through the second intake section, and the exhaust gas is output to the heat exchange unit through the first exhaust section to exchange heat with the compressed air, and is output to the exhaust pipeline through the second exhaust section. The present application sets a heat exchange part on the output path of the intake and exhaust pipelines, and sets a cooling circuit to heat the high-temperature and high-pressure compressed air of the first intake section, thereby reducing the temperature of the compressed air in the second intake section entering the fuel cell stack, avoiding damage to the fuel cell stack, and the present application makes the exhaust gas with a lower temperature discharged by the fuel cell stack output to the heat exchange part through the first exhaust section to exchange heat with the compressed air, which can further reduce the temperature of the compressed air, reduce the workload of the cooling circuit, and increase the exhaust temperature in the second exhaust section output to the tail exhaust pipeline, thereby increasing the saturated vapor pressure of water, reducing the condensation of water vapor in cold environments, thereby reducing the generation of fog and ensuring road driving safety. Through the application of the present application, the problem of water condensation in the exhaust gas of fuel cell vehicles in cold environments, which causes exhaust fogging, obstructs the driving vision of the following vehicles, and brings hidden dangers to driving safety is solved.

[0023] The fuel cell system provided in the second aspect of the present application and the fuel cell vehicle provided in the third aspect have the same or similar technical effects as the exhaust gas treatment device provided in the first aspect of the present application.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1The schematic diagram of the structure of an exhaust gas treatment device provided in an embodiment of the present application is shown;

[0027] Figure 2 The structural diagram of the heat exchange part of an exhaust gas treatment device provided in an embodiment of the present application is schematically shown.

[0028] Description of reference numerals:

[0029] 1. Exhaust treatment device; 11. Intake pipeline; 12. Exhaust pipeline; 13. Heat exchange unit; 14. Cooling circuit; 15. Exhaust pipeline; 111. First intake section; 112. Second intake section; 113. Air compression assembly; 114. Filter component; 121. First exhaust section; 122. Second exhaust section; 131. First inlet; 132. First outlet; 133. Second inlet; 134. Second outlet; 135. Third inlet; 136. Third outlet; 1121. First valve body; 1122. First pressure sensor; 1123. Temperature sensor; 1131. Monitoring module; 1132. Air compressor; 1211. Second valve body; 1212. Second pressure sensor; 1213. Silencer component;

[0030] 2. Battery stack. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0032] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specified, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as merely exemplary, rather than as limiting.

[0033] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure 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 cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0035] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or a component connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific situation. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0036] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0038] Embodiment 1

[0039] like Figure 1As shown, the first aspect of the present application provides an exhaust gas treatment device 1, comprising an intake pipeline 11, an exhaust pipeline 12 and a heat exchange unit 13; the intake pipeline 11 outputs compressed air to the fuel cell stack 2; the exhaust pipeline 12 is connected to the fuel cell stack 2 to output the exhaust gas discharged by the fuel cell stack 2; the heat exchange unit 13 is connected to the output path of the intake pipeline 11 to separate the intake pipeline 11 into a first intake section 111 and a second intake section 112, and the heat exchange unit 13 is connected to the output path of the exhaust pipeline 12 , so as to separate the exhaust pipeline 12 into a first exhaust section 121 and a second exhaust section 122, and a cooling circuit 14 is also provided between the heat exchange part 13 and the fuel cell stack 2; wherein, the compressed air is output to the heat exchange part 13 through the first air intake section 111, and after heat exchange with the cooling medium of the cooling circuit 14, it is output to the fuel cell stack 2 through the second air intake section 112, and the exhaust gas is output to the heat exchange part 13 through the first exhaust section 121 to exchange heat with the compressed air, and is output to the tail exhaust pipeline 15 through the second exhaust section 122.

[0040] Specifically, the present application sets a heat exchange unit 13 on the output path of the intake pipe 11 and the exhaust pipe 12, and sets a cooling circuit 14 to perform heat exchange on the high-temperature and high-pressure compressed air of the first intake section 111, thereby reducing the temperature of the compressed air in the second intake section 112 entering the fuel cell stack 2 to avoid damage to the fuel cell stack 2. The present application outputs the relatively low-temperature exhaust gas discharged from the fuel cell stack 2 to the heat exchange unit 13 through the first exhaust section 121 for heat exchange with the compressed air, which can further reduce the temperature of the compressed air, so that the high-temperature and high-pressure compressed air is cooled and heat-exchanged by the cooling circuit 14 and the exhaust gas at the same time during the circulation process of the medium in the exhaust gas treatment device 1 before entering the fuel cell stack 2, so as to protect the fuel cell stack 2 from high-temperature damage, and by accurately controlling the heat exchange process in the heat exchange unit 13, the temperature of the compressed air entering the fuel cell stack 2 can be effectively adjusted to ensure that the fuel cell stack 2 operates within a suitable operating temperature range, thereby improving operating efficiency and service life.

[0041] The present application enables the relatively low-temperature exhaust gas discharged from the fuel cell stack 2 to be output to the heat exchange part 13 through the first exhaust section 121 for heat exchange with the compressed air, which can further reduce the temperature of the compressed air, reduce the workload of the cooling circuit 14, and at the same time increase the exhaust gas temperature output to the second exhaust section 122 of the tail exhaust pipe 15, thereby increasing the saturated vapor pressure of water, reducing the condensation of water vapor in a cold environment, thereby reducing the generation of fog and ensuring road driving safety.

[0042] In the present application, the heat exchange part 13 can be an intercooler or heat exchanger with multiple cavities to realize the connection between the first air intake section 111 and the second air intake section 112 of compressed air, the first exhaust section 121 and the second exhaust section 122 of exhaust gas, and the cooling circuit 14, so as to realize the increase of the temperature of the exhaust gas discharged to the tail exhaust pipe 15 after the heat exchange process is completed, increase the saturated vapor pressure of water, reduce the condensation of water vapor in the cold environment, and thus reduce the generation of fog, thereby ensuring road driving safety.

[0043] By controlling the gas flow of the second air intake section 112 and the first exhaust section 121, the flow of compressed air entering the fuel cell stack 2 and the flow of exhaust gas discharged can be flexibly adjusted to adapt to different workloads and environmental conditions, and the heat exchange part 13 can help balance the pressure of the medium in different delivery sections to ensure that the fuel cell system can operate stably under various operating conditions.

[0044] In the present application, the cooling circuit 14 is connected between the heat exchange part 13 and the fuel cell stack 2, so that the cooling medium in the cooling circuit 14 can absorb and take away the heat generated by the fuel cell stack 2 during operation while exchanging heat and cooling the compressed air in the heat exchange part 13, so as to maintain a uniform distribution of the internal temperature of the fuel cell stack 2, avoid local overheating, and improve the stability and safety of the fuel cell system.

[0045] In a first aspect, the present application provides an exhaust gas treatment device 1, comprising an intake pipe 11, an exhaust pipe 12 and a heat exchange unit 13; the intake pipe 11 outputs compressed air to the fuel cell stack 2; the exhaust pipe 12 is connected to the fuel cell stack 2 to output the exhaust gas discharged by the fuel cell stack 2; the heat exchange unit 13 is connected to the output path of the intake pipe 11 to separate the intake pipe 11 into a first intake section 111 and a second intake section 112, and the heat exchange unit 13 is connected to the output path of the exhaust pipe 12 to The exhaust pipeline 12 is divided into a first exhaust section 121 and a second exhaust section 122, and a cooling circuit 14 is also provided between the heat exchange part 13 and the fuel cell stack 2; wherein the compressed air is output to the heat exchange part 13 through the first air intake section 111, and after heat exchange with the cooling medium of the cooling circuit 14, it is output to the fuel cell stack 2 through the second air intake section 112, and the exhaust gas is output to the heat exchange part 13 through the first exhaust section 121 to exchange heat with the compressed air, and is output to the tail exhaust pipeline 15 through the second exhaust section 122. The present application sets a heat exchange unit 13 on the output path of the intake pipe 11 and the exhaust pipe 12, and sets a cooling circuit 14 to heat the high-temperature and high-pressure compressed air of the first intake section 111, thereby reducing the temperature of the compressed air entering the second intake section 112 of the stack 2, avoiding damage to the stack 2, and the present application makes the exhaust gas with a lower temperature discharged by the stack 2 output to the heat exchange unit 13 through the first exhaust section 121 to exchange heat with the compressed air, which can further reduce the temperature of the compressed air, reduce the workload of the cooling circuit 14, and increase the exhaust temperature output to the second exhaust section 122 of the exhaust pipe 15, thereby increasing the saturated vapor pressure of water, reducing the condensation of water vapor in a cold environment, thereby reducing the generation of fog, and ensuring road driving safety. Through the application of the present application, the problem of water condensation in the exhaust gas of a fuel cell vehicle in a cold environment, which causes the exhaust gas to fog, obstructs the driving vision of the following vehicle, and brings hidden dangers to driving safety is solved.

[0046] like Figure 1 and Figure 2As shown, in some embodiments, the heat exchange portion 13 has a first flow channel, a second flow channel and a third flow channel, the two ends of the first flow channel form a first inlet 131 and a first outlet 132 on the heat exchange portion 13, respectively, the two ends of the second flow channel form a second inlet 133 and a second outlet 134 on the heat exchange portion 13, respectively, and the two ends of the third flow channel form a third inlet 135 and a third outlet 136 on the heat exchange portion 13; wherein, the first inlet 131 is connected to the first air intake section 111, the first outlet 132 is connected to the second air intake section 112, the second inlet 133 is connected to the first exhaust section 121, the second outlet 134 is connected to the second exhaust section 122, and the third inlet 135 and the third outlet 136 are respectively connected to the two ends of the cooling circuit 14.

[0047] Specifically, in the present application, the heat exchange part 13 adopts a multi-channel setting and has a first channel, a second channel and a third channel. The setting of the three channels allows the heat exchange part 13 to fully utilize the space, thereby improving the compactness of the fuel cell system. The two ends of the first channel respectively form a first inlet 131 and a first outlet 132 on the heat exchange part 13. The first inlet 131 is connected to the first air intake section 111, and the first outlet 132 is connected to the second air intake section 112, so as to output the compressed air of the fuel cell stack 2 through the first channel; the two ends of the second channel respectively form a second inlet 133 and a second outlet 134 on the heat exchange part 13. The second inlet 133 is connected to the first exhaust section 121, and the second outlet 134 is connected to the second exhaust section 122, so as to output the exhaust gas generated by the fuel cell stack 2 through the second channel; the two ends of the third channel respectively form a third inlet 131 and a first outlet 132 on the heat exchange part 13. 135 and the third outlet 136, the third inlet 135 and the third outlet 136 are respectively connected to the two ends of the cooling circuit 14, the cooling circuit 14 exchanges heat with the high-temperature and high-pressure compressed air of the first air intake section 111, reduces the temperature of the compressed air entering the second air intake section 112 of the fuel cell stack 2, and avoids damage to the fuel cell stack 2. At the same time, the exhaust gas with a lower temperature is output to the heat exchange part 13 through the first exhaust section 121 to exchange heat with the compressed air, which can further reduce the temperature of the compressed air and reduce the workload of the cooling circuit 14. The present application integrates the intake, exhaust and cooling functions into one through the setting of the heat exchange part 13, thereby simplifying the system structure.

[0048] like Figure 1 As shown, in some embodiments, an air compression component 113 is provided on the first air intake section 111. The air compression component 113 includes a monitoring module 1131 and an air compressor 1132. The air compressor 1132 is arranged between the monitoring module 1131 and the heat exchange part 13 for compressing the gas entering the first air intake section 111. The monitoring module 1131 monitors the temperature flow data of the gas entering the first air intake section 111 to control the compression power of the air compressor 1132.

[0049] Specifically, in order to ensure the normal operation of the stack 2 in the fuel cell system, the present application outputs compressed air for the stack 2 through the first air intake section 111. The present application is provided with an air compression component 113 on the first air intake section 111. The air compression component 113 includes a monitoring module 1131 and an air compressor 1132. After the external gas enters the first air intake section 111, it first passes through the monitoring module 1131 and then enters the air compressor 1132 to output high-temperature and high-pressure compressed air. The monitoring module 1131 can monitor the temperature and flow data of the gas entering the first air intake section 111 in real time. According to the monitored data, the monitoring module 1131 can dynamically adjust the compression power of the air compressor 1132 to adapt to different workloads and environmental conditions, which helps to maintain efficient operation of the system and extend the service life of the fuel cell system.

[0050] The monitoring module 1131 can timely detect temperature anomalies or flow fluctuations by monitoring the temperature and flow data of the gas entering the first air inlet section 111, and issue an early warning, and can control the compression power reduction of the air compressor 1132 and start the cooling system and other measures to achieve protection. The monitoring module 1131 can be a flow meter integrated with a temperature acquisition unit to acquire temperature and flow data, or a thermometer integrated with a flow sensor to achieve acquisition, and the specific details are not limited.

[0051] like Figure 1 As shown, in some embodiments, a filter component 114 is further disposed on the first air intake section 111 . The filter component 114 is disposed before the air compression component 113 and is used to filter the gas entering the first air intake section 111 .

[0052] Specifically, the present application is also provided with a filter component 114 on the first air intake section 111, and the filter component 114 can effectively remove dust, particulate matter and other impurities that may be contained in the air entering the system. If these pollutants enter the battery stack 2 directly without treatment, they may be deposited on the electrode surface or block the gas diffusion layer, resulting in degradation of the performance of the battery stack 2, or even irreversible damage. Through pre-filtration, it can be ensured that the air supplied to the battery stack 2 is clean, thereby extending the service life of the battery stack 2 and maintaining its efficient operation. The filtered clean air can also reduce damage to the air compression assembly 113, the heat exchange unit 13, the battery stack 2, etc. that it passes through later, thereby reducing maintenance costs and improving the reliability of the entire system. The filter component 114 can be a particulate air filter, an activated carbon filter, an oil separator, a molecular sieve, etc., which is not limited to the specific ones, and can effectively remove dust, particulate matter and other impurities that may be contained in the air entering the system.

[0053] like Figure 1As shown, in some embodiments, a first valve body 1121 is provided on the second air intake section 112, and the first valve body 1121 is used to regulate the flow rate of compressed air output to the fuel cell stack 2; a second valve body 1211 is provided on the first exhaust section 121, and the second valve body 1211 is used to regulate the flow rate of exhaust gas output to the heat exchange part 13.

[0054] Specifically, the present application is provided with a first valve body 1121 and a second valve body 1211 on the second air intake section 112 and the first exhaust section 121, respectively. The flow rate of the compressed air output to the stack 2 is regulated by the first valve body 1121, so that the stack 2 can be ensured to operate under suitable working conditions, and the first valve body 1121 can be dynamically adjusted according to the actual needs of the work. The flow rate of the tail gas output to the heat exchange part 13 is regulated by the second valve body 1211, so that the heat exchange process of the tail gas in the heat exchange part 13 can be optimized. The appropriate tail gas flow rate helps to improve the heat exchange efficiency, ensure the smooth heat exchange process, and reduce the pressure loss during the transmission process. The first valve body 1121 can be a stop valve, a regulating valve, a proportional valve, etc., and the second valve body 1211 can be a back pressure valve to maintain the minimum pressure of the first exhaust section 121 and maintain the stable operation of the system. The second valve body 1211 can also be a regulating valve, a stop valve, a ball valve, etc., which can be adjusted according to actual production needs.

[0055] The present application realizes dynamic adjustment of the compressed air flow of the fuel cell stack 2 and the exhaust gas flow involved in heat exchange under different workloads through the setting of the first valve body 1121 and the second valve body 1211, so that the present application can achieve efficient and stable heat exchange while ensuring the efficient operation of the fuel cell stack 2, increase the exhaust gas temperature in the second exhaust section 122 output to the tail exhaust pipe 15, thereby increasing the saturated vapor pressure of water, reducing water vapor condensation in cold environments, thereby reducing fog generation and ensuring road driving safety.

[0056] like Figure 1 As shown, in some embodiments, a first pressure sensor 1122 and a temperature sensor 1123 are further provided on the second air intake section 112 , and the first pressure sensor 1122 and the temperature sensor 1123 are provided behind the first valve body 1121 .

[0057] Specifically, in order to ensure the stable operation of the fuel cell system, the present application further provides a first pressure sensor 1122 and a temperature sensor 1123 on the second air intake section 112. The first pressure sensor 1122 and the temperature sensor 1123 are provided behind the first valve body 1121 to measure the accurate temperature and pressure data of the compressed air entering the fuel cell stack 2, so as to accurately control the working conditions entering the fuel cell stack 2, and to achieve real-time monitoring through the first pressure sensor 1122 and the temperature sensor 1123, so as to give early warning and timely handle abnormal situations, so as to prevent overheating or overpressure from causing damage to the equipment in the system. In addition, the present application reduces the data delay caused by the operation of the first valve body 1121 and improves the response speed of the system by providing the first pressure sensor 1122 and the temperature sensor 1123 behind the first valve body 1121.

[0058] like Figure 1 As shown, in some embodiments, a second pressure sensor 1212 is further disposed on the first exhaust section 121 , and the second pressure sensor 1212 is disposed in front of the second valve body 1211 .

[0059] Specifically, in order to ensure the stability of the exhaust gas emission of the stack 2 so that the heat exchange can be carried out in the heat exchange part 13 later, the present application is also provided with a second pressure sensor 1212 on the first exhaust section 121, and the second pressure sensor 1212 is arranged in front of the second valve body 1211. The pressure drop generated inside the stack 2 can be obtained through the data measured by the second pressure sensor 1212 and the data measured by the first pressure sensor 1122 on the second air intake section 112, and the change of the pressure drop can be used to evaluate the performance of the stack 2 and diagnose potential problems. And through the monitoring of the second pressure sensor 1212, it is convenient to better control the second valve body 1211. In one embodiment, the second valve body 1211 is a back pressure valve, and the second pressure sensor 1212 can assist the back pressure valve in maintaining the pressure level of the exhaust gas discharged from the stack 2 to provide a suitable back pressure to ensure the efficient operation of the stack 2.

[0060] like Figure 1 As shown, in some embodiments, a silencer component 1213 is further provided on the first exhaust section 121 , and the silencer component 1213 is located between the second valve body 1211 and the heat exchange portion 13 .

[0061] Specifically, in order to reduce the noise generated when exhaust gas is discharged, improve the user experience and protect the equipment components in the fuel cell system, the present application also provides a silencer component 1213 on the first exhaust section 121, and the silencer component 1213 is located between the second valve body 1211 and the heat exchange part 13. The silencer component 1213 absorbs, reflects and diffuses sound waves to eliminate the noise generated when the exhaust gas is discharged due to high-speed flow and passing through the node. At the same time, for the fuel cell system of the fuel cell vehicle, the silencer component 1213 can bring a quieter driving experience and optimize the user's driving experience. The silencer component 1213 can also reduce the vibration of the equipment components in the fuel cell system caused by the exhaust gas flow process. The silencer component 1213 can avoid the occurrence of resonance on site through appropriate design, thereby reducing mechanical stress and fatigue damage and improving the reliability and stability of the system.

[0062] The silencer component 1213 may be a resistive silencer, a resonance silencer, an expansion silencer, a micro-perforated plate silencer, etc., without limitation, as long as it can reduce the noise during the tail exhaust process.

[0063] Embodiment 2

[0064] like Figure 1 As shown, the second aspect of the present application provides a fuel cell system, including a fuel cell stack 2 and an exhaust gas treatment device 1, wherein the heat exchange portion 13 of the exhaust gas treatment device 1 is connected to the fuel cell stack 2 via a second air intake section 112, a cooling circuit 14 and a first exhaust section 121 respectively.

[0065] Specifically, please refer to the first embodiment for the specific structure of the exhaust gas treatment device 1, which will not be described in detail here.

[0066] A second aspect of the present application provides a fuel cell system, including a fuel cell stack 2 and an exhaust gas treatment device 1, wherein a heat exchange portion 13 of the exhaust gas treatment device 1 is connected to the fuel cell stack 2 via a second air intake section 112, a cooling circuit 14 and a first exhaust section 121 respectively. The exhaust gas treatment device 1 includes an intake pipeline 11, an exhaust pipeline 12 and a heat exchange part 13; the intake pipeline 11 outputs compressed air to the fuel cell stack 2; the exhaust pipeline 12 is connected to the fuel cell stack 2 to output the exhaust gas discharged by the fuel cell stack 2; the heat exchange part 13 is connected to the output path of the intake pipeline 11 to separate the intake pipeline 11 into a first intake section 111 and a second intake section 112, and the heat exchange part 13 is connected to the output path of the exhaust pipeline 12 to separate the exhaust pipeline 12 into a first exhaust section 121 and a second exhaust section 122, and a cooling circuit 14 is also provided between the heat exchange part 13 and the fuel cell stack 2; wherein, the compressed air is output to the heat exchange part 13 through the first intake section 111 and exchanges heat with the cooling medium of the cooling circuit 14, and then is output to the fuel cell stack 2 through the second intake section 112, and the exhaust gas is output to the heat exchange part 13 through the first exhaust section 121 to exchange heat with the compressed air, and then is output to the exhaust pipeline 15 through the second exhaust section 122. The present application sets a heat exchange unit 13 on the output path of the intake pipe 11 and the exhaust pipe 12, and sets a cooling circuit 14 to heat the high-temperature and high-pressure compressed air of the first intake section 111, thereby reducing the temperature of the compressed air entering the second intake section 112 of the stack 2, avoiding damage to the stack 2, and the present application makes the exhaust gas with a lower temperature discharged by the stack 2 output to the heat exchange unit 13 through the first exhaust section 121 to exchange heat with the compressed air, which can further reduce the temperature of the compressed air, reduce the workload of the cooling circuit 14, and increase the exhaust temperature output to the second exhaust section 122 of the exhaust pipe 15, thereby increasing the saturated vapor pressure of water, reducing the condensation of water vapor in a cold environment, thereby reducing the generation of fog, and ensuring road driving safety. Through the application of the present application, the problem of water condensation in the exhaust gas of a fuel cell vehicle in a cold environment, which causes the exhaust gas to fog, obstructs the driving vision of the following vehicle, and brings hidden dangers to driving safety is solved.

[0067] Embodiment 3

[0068] A third aspect of the present application provides a fuel cell vehicle, including a fuel cell system.

[0069] Specifically, please refer to the second embodiment for the specific structure of the fuel cell system, which will not be described in detail here.

[0070] The third aspect of the present application provides a fuel cell vehicle, including a fuel cell system. The fuel cell system includes a stack 2 and an exhaust gas treatment device 1, wherein the heat exchange portion 13 of the exhaust gas treatment device 1 is connected to the stack 2 through the second air intake section 112, the cooling circuit 14 and the first exhaust section 121. The exhaust gas treatment device 1 includes an intake pipeline 11, an exhaust pipeline 12 and a heat exchange part 13; the intake pipeline 11 outputs compressed air to the fuel cell stack 2; the exhaust pipeline 12 is connected to the fuel cell stack 2 to output the exhaust gas discharged by the fuel cell stack 2; the heat exchange part 13 is connected to the output path of the intake pipeline 11 to separate the intake pipeline 11 into a first intake section 111 and a second intake section 112, and the heat exchange part 13 is connected to the output path of the exhaust pipeline 12 to separate the exhaust pipeline 12 into a first exhaust section 121 and a second exhaust section 122, and a cooling circuit 14 is also provided between the heat exchange part 13 and the fuel cell stack 2; wherein, the compressed air is output to the heat exchange part 13 through the first intake section 111 and exchanges heat with the cooling medium of the cooling circuit 14, and then is output to the fuel cell stack 2 through the second intake section 112, and the exhaust gas is output to the heat exchange part 13 through the first exhaust section 121 to exchange heat with the compressed air, and then is output to the exhaust pipeline 15 through the second exhaust section 122. The present application sets a heat exchange unit 13 on the output path of the intake pipe 11 and the exhaust pipe 12, and sets a cooling circuit 14 to heat the high-temperature and high-pressure compressed air of the first intake section 111, thereby reducing the temperature of the compressed air entering the second intake section 112 of the stack 2, avoiding damage to the stack 2, and the present application makes the exhaust gas with a lower temperature discharged by the stack 2 output to the heat exchange unit 13 through the first exhaust section 121 to exchange heat with the compressed air, which can further reduce the temperature of the compressed air, reduce the workload of the cooling circuit 14, and increase the exhaust temperature output to the second exhaust section 122 of the exhaust pipe 15, thereby increasing the saturated vapor pressure of water, reducing the condensation of water vapor in a cold environment, thereby reducing the generation of fog, and ensuring road driving safety. Through the application of the present application, the problem of water condensation in the exhaust gas of a fuel cell vehicle in a cold environment, which causes the exhaust gas to fog, obstructs the driving vision of the following vehicle, and brings hidden dangers to driving safety is solved.

[0071] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0072] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A tail gas treatment device, characterized in that: include: An air intake pipeline (11), wherein the air intake pipeline (11) outputs compressed air to the fuel cell stack (2); An exhaust pipeline (12), the exhaust pipeline (12) being connected to the fuel cell stack (2) to output exhaust gas discharged from the fuel cell stack (2); A heat exchange portion (13), the heat exchange portion (13) being connected to an output path of the intake pipeline (11) so as to separate the intake pipeline (11) into a first intake section (111) and a second intake section (112), and the heat exchange portion (13) being connected to an output path of the exhaust pipeline (12) so as to separate the exhaust pipeline (12) into a first exhaust section (121) and a second exhaust section (122), and a cooling circuit (14) being further provided between the heat exchange portion (13) and the fuel cell stack (2); The compressed air is output to the heat exchange part (13) through the first air intake section (111) and exchanges heat with the cooling medium of the cooling circuit (14), and then output to the fuel cell stack (2) through the second air intake section (112); the exhaust gas is output to the heat exchange part (13) through the first exhaust section (121) and exchanges heat with the compressed air, and then output to the exhaust pipe (15) through the second exhaust section (122).

2. The exhaust gas treatment device according to claim 1, characterized in that: The heat exchange portion (13) has a first flow channel, a second flow channel and a third flow channel, the two ends of the first flow channel respectively form a first inlet (131) and a first outlet (132) on the heat exchange portion (13), the two ends of the second flow channel respectively form a second inlet (133) and a second outlet (134) on the heat exchange portion (13), and the two ends of the third flow channel respectively form a third inlet (135) and a third outlet (136) on the heat exchange portion (13); The first inlet (131) is connected to the first air intake section (111), the first outlet (132) is connected to the second air intake section (112), the second inlet (133) is connected to the first exhaust section (121), the second outlet (134) is connected to the second exhaust section (122), and the third inlet (135) and the third outlet (136) are respectively connected to two ends of the cooling circuit (14).

3. The exhaust gas treatment device according to claim 2, characterized in that: An air compression component (113) is provided on the first air intake section (111), and the air compression component (113) includes a monitoring module (1131) and an air compressor (1132). The air compressor (1132) is provided between the monitoring module (1131) and the heat exchange part (13) and is used for compressing the gas entering the first air intake section (111). The monitoring module (1131) monitors the temperature and flow data of the gas entering the first air intake section (111) to control the compression power of the air compressor (1132).

4. The exhaust gas treatment device according to claim 3, characterized in that: The first air intake section (111) is also provided with a filter component (114), which is arranged in front of the air compression component (113) and is used for filtering the gas entering the first air intake section (111).

5. The exhaust gas treatment device according to claim 1, characterized in that: The second air intake section (112) is provided with a first valve body (1121), and the first valve body (1121) is used to regulate the flow rate of the compressed air output to the fuel cell stack (2); The first exhaust section (121) is provided with a second valve body (1211), and the second valve body (1211) is used to regulate the flow rate of the exhaust gas output to the heat exchange part (13).

6. The exhaust gas treatment device according to claim 5, characterized in that: The second air intake section (112) is also provided with a first pressure sensor (1122) and a temperature sensor (1123); the first pressure sensor (1122) and the temperature sensor (1123) are arranged behind the first valve body (1121).

7. The exhaust gas treatment device according to claim 6, characterized in that: The first exhaust section (121) is also provided with a second pressure sensor (1212), and the second pressure sensor (1212) is arranged in front of the second valve body (1211).

8. The tail gas treatment device according to any one of claims 5 to 7, characterized in that: The first exhaust section (121) is also provided with a silencer component (1213), and the silencer component (1213) is located between the second valve body (1211) and the heat exchange portion (13).

9. A fuel cell system, characterized in that: include: Battery stack (2); According to any one of claims 1 to 8, the heat exchange portion (13) of the exhaust gas treatment device (1) is connected to the fuel cell stack (2) via a second air intake section (112), a cooling circuit (14) and a first exhaust section (121), respectively.

10. A fuel cell vehicle, characterized in that: include: The fuel cell system as claimed in claim 9.

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