An integrated stack system

Abstract

The utility model relates to the field of methanol reforming power generation, especially to an integrated electric pile system, including reformer and electric pile, the reformer includes the reaction chamber and combustion chamber of sealed connection, the electric pile includes the upper end plate, power generation assembly and lower end plate of detachable connection from top to bottom in proper order, the upper end plate is passed through the combustion chamber with the reaction chamber intercommunication, has set up first air inlet hole on the upper end plate, the combustion chamber detachable setting on the upper end plate. The combustion chamber carries out combustion, carries out heat exchange to the reaction chamber through heat exchange channel to guarantee the reaction efficiency, the combustion chamber additionally also carries out the preheating to the electric pile, and then guarantees the starting efficiency of electric pile, the hydrogen of reaction chamber generation enters power generation assembly through the upper end plate, realizes the hydrogen reaction power generation of electric pile, sets up the combustion chamber detachable on the upper end plate, avoided the connection of traditional through some transition connection to realize the reformer and electric pile, greatly reduced the complexity of equipment, to realize the miniaturization of equipment.

Description

Technical Field

[0001] This utility model relates to the field of methanol reforming power generation, and in particular to an integrated fuel cell stack system. Background Technology

[0002] In the current energy technology field, methanol reforming for hydrogen production plays a crucial role. This technology primarily involves converting methanol into hydrogen through a series of chemical reactions. Hydrogen fuel cells, as a highly efficient and clean energy conversion and supply technology, can effectively convert the chemical energy of hydrogen into electrical energy, and the byproducts generated in this process are completely pollution-free. Therefore, hydrogen fuel cell technology is widely considered one of the most promising energy technologies for the future.

[0003] Methanol reforming for hydrogen production mainly includes two methods: methanol steam reforming and methanol partial oxidation. In methanol steam reforming, methanol and steam undergo a reforming reaction under the action of a catalyst, ultimately producing hydrogen and carbon dioxide. This technology is quite mature and has been widely adopted in practical applications. Its advantages lie in its high hydrogen yield and the ability to achieve very high product hydrogen purity, typically exceeding 99.9%.

[0004] However, the equipment used for power generation via fuel cell stacks after methanol reforming to produce hydrogen is often structurally complex, making miniaturization difficult. Therefore, how to effectively combine the methanol reforming process with the fuel cell stack power generation stage and achieve miniaturization of the entire system has become a crucial challenge that the industry urgently needs to address. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an integrated fuel cell stack system, which solves the problem of integrated design of reformer and fuel cell stack.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An integrated fuel cell stack system includes a reformer and a fuel cell stack. The reformer includes a reaction chamber and a combustion chamber that are sealed together. A heat exchange channel is provided inside the reaction chamber. Methanol combustion is connected to the heat exchange channel through the combustion chamber. The reaction chamber is heat exchanged with the heat exchange channel.

[0007] The fuel cell stack includes an upper end plate, a power generation component, and a lower end plate that are detachably connected from top to bottom. The upper end plate is connected to the reaction chamber through the combustion chamber. A first air inlet is provided on the upper end plate. The combustion chamber is detachably mounted on the upper end plate.

[0008] Furthermore, it also includes an air preheating heat exchanger, which is connected to one side of the reaction chamber. The first air inlet is connected to the air preheating heat exchanger, and a second air inlet is provided on the air preheating heat exchanger.

[0009] Furthermore, the reaction chamber includes a shell, an upper partition, a lower partition, a first sealing plate, and a second sealing plate. The upper and lower partitions are arranged parallel to each other inside the shell, dividing the space into upper, middle, and lower layers. The first and second sealing plates seal off both ends of the middle layer to form a reaction zone. A vent is provided on the second sealing plate, which communicates with the upper end plate. An air supply hole is provided on the shell, which communicates with the reaction zone. The upper and lower layers form the heat exchange channel, and the upper layer communicates with the combustion chamber.

[0010] Furthermore, the combustion chamber includes a methanol-water preheating unit and a flameless combustion heating unit that are fixedly connected or integrally formed. The methanol-water preheating unit and the flameless combustion heating unit form a methanol-water heating zone. A flameless combustion catalyst is provided on the side of the flameless combustion heating unit connected to the methanol-water preheating unit. A methanol inlet is provided on the methanol-water preheating unit, which is connected to the methanol-water heating zone. The methanol-water preheating unit is connected to the heat exchange channel. A hydrogen channel is provided on the methanol-water preheating unit, and the reaction zone is connected to the upper end plate through the hydrogen channel.

[0011] Furthermore, the side of the methanol-water preheating unit facing the reaction chamber is divided into a gas dispersion zone and a methanol-fired heat exchange zone. The gas dispersion zone is connected to the upper layer, and the methanol-fired heat exchange zone is connected to the lower layer.

[0012] Furthermore, the methanol-water combustion preheating unit is provided with a hydrogen outlet and an air inlet. The hydrogen channel is connected to the upper end plate through the hydrogen outlet, and the methanol-water combustion heating zone is connected to the upper end plate through the air inlet.

[0013] Furthermore, the methanol-water combustion preheating unit is also provided with a reflux hole, and the upper end plate is connected to the methanol-water combustion heating zone through the reflux hole.

[0014] Furthermore, a heating rod is embedded in the methanol-water combustion preheating unit.

[0015] Furthermore, the upper end plate is provided with an air intake channel, an air outlet channel, a hydrogen intake channel, and an exhaust gas outlet channel. The air intake channel is connected to the air preheating heat exchanger through the first air intake hole, the air outlet channel is connected to the air inlet hole, the hydrogen intake channel is connected to the hydrogen channel through the hydrogen outlet hole, and the exhaust gas outlet channel is connected to the return hole.

[0016] This utility model provides an integrated fuel cell stack system, including a reformer and a fuel cell stack. The reformer includes a reaction chamber and a combustion chamber that are sealed together. A heat exchange channel is provided inside the reaction chamber. Methanol combustion is connected to the heat exchange channel through the combustion chamber. The reaction chamber is heat exchanged with the heat exchange channel.

[0017] The fuel cell stack includes an upper end plate, a power generation component, and a lower end plate, which are detachably connected from top to bottom. The upper end plate communicates with the reaction chamber through the combustion chamber, and a first air inlet is provided on the upper end plate. The combustion chamber is detachably mounted on the upper end plate. In this way, during combustion, the combustion chamber exchanges heat with the reaction chamber through a heat exchange channel to ensure reaction efficiency. The combustion chamber also preheats the fuel cell stack, thereby ensuring its start-up efficiency. The hydrogen produced in the reaction chamber enters the power generation component through the upper end plate, realizing hydrogen reaction power generation from the fuel cell stack. Detachably mounting the combustion chamber on the upper end plate avoids the traditional method of connecting the reformer and the fuel cell stack through transitional connections, greatly reducing the complexity of the equipment and achieving miniaturization. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an integrated fuel cell stack system according to this utility model;

[0019] Figure 2 This is a schematic diagram of the reaction chamber structure of an integrated fuel cell stack system according to the present invention;

[0020] Figure 3 This is a schematic diagram of the heat exchange channel side structure of an integrated fuel cell stack system according to this utility model;

[0021] Figure 4 This is a schematic diagram of the combustion chamber structure of an integrated fuel cell stack system according to the present invention;

[0022] Figure 5 This is a schematic diagram of the gas dispersion zone side of the combustion chamber of an integrated fuel cell stack system according to this utility model;

[0023] Figure 6 This is a schematic diagram of the upper plate structure of an integrated fuel cell stack system according to the present invention.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Reaction chamber; 101. Shell; 102. Upper partition; 103. Lower partition; 104. First sealing plate; 105. Second sealing plate; 106. Vent; 107. Gas supply port; 108. Reaction zone; 2. Combustion chamber; 201. Methanol-water preheating unit; 2011. Methanol inlet; 2012. Hydrogen passage; 2013. Gas dispersion zone; 2014. Methanol heat exchange zone; 201 5. Hydrogen outlet, 2016. Air inlet, 2017. Return outlet, 2018. Heating rod, 202. Flameless combustion heating unit, 3. Heat exchange channel, 4. Upper end plate, 401. Air inlet channel, 402. Air outlet channel, 403. Hydrogen inlet channel, 404. Exhaust gas outlet channel, 5. Power generation component, 6. Lower end plate, 7. Air preheating heat exchanger, 701. Second air inlet. Detailed Implementation

[0026] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "center", "inner", "outer", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] like Figures 1-6 As shown, this utility model provides an integrated fuel cell stack system, including a reformer and a fuel cell stack. The reformer includes a reaction chamber 1 and a combustion chamber 2 that are sealed together. A heat exchange channel 3 is provided inside the reaction chamber 1. Methanol combustion is connected to the heat exchange channel 3 through the combustion chamber 2. The reaction chamber 1 is heat-exchange connected to the heat exchange channel.

[0030] The fuel cell stack includes an upper end plate 4, a power generation component 5, and a lower end plate 6, which are detachably connected from top to bottom. The upper end plate 4 is connected to the reaction chamber 1 through the combustion chamber 2. The upper end plate 4 has a first air inlet. The combustion chamber 2 is detachably mounted on the upper end plate 4. In this way, when the combustion chamber 2 is burning, it exchanges heat with the reaction chamber 1 through the heat exchange channel 3 to ensure reaction efficiency. The combustion chamber 2 also preheats the fuel cell stack, thereby ensuring the start-up efficiency of the fuel cell stack. The hydrogen produced in the reaction chamber 1 enters the power generation component 5 through the upper end plate 4 to realize the hydrogen reaction power generation of the fuel cell stack. The detachable mounting of the combustion chamber 2 on the upper end plate 4 avoids the traditional connection between the reformer and the fuel cell stack through some transitional connections, greatly reducing the complexity of the equipment and realizing the miniaturization of the equipment.

[0031] The integrated fuel cell stack system of this utility model, such as Figures 1-6 As shown, based on the previously described technical solution, it can also include an air preheating heat exchanger 7. The air preheating heat exchanger 7 is heat-exchange connected to one side of the reaction chamber 1. The first air inlet is connected to the air preheating heat exchanger 7, and the air preheating heat exchanger 7 is provided with a second air inlet 701. In this way, by preheating the air entering the reaction chamber 1 through the air preheating heat exchanger 7, the efficiency and stability of the methanol reforming reaction within the reaction chamber 1 can be improved. Simultaneously, since the air is preheated before entering the reaction chamber 1, temperature fluctuations within the reaction chamber 1 are reduced, which helps maintain a stable temperature environment within the reaction chamber 1. Furthermore, the second air inlet 701 on the air preheating heat exchanger 7 can conveniently introduce fresh air. After being heated, the air enters the fuel cell stack through the first air inlet, preventing the fuel cell stack from becoming too cold and affecting its reaction and power generation efficiency.

[0032] The integrated fuel cell stack system of this utility model, such as Figures 1-6As shown, based on the technical solution described above, the reaction chamber 1 can also be: a shell 101, an upper partition 102, a lower partition 103, a first sealing plate 104, and a second sealing plate 105. The upper partition 102 and the lower partition 103 are arranged parallel to each other inside the shell 101. The upper partition 102 and the lower partition 103 divide the space into upper, middle, and lower layers. The first sealing plate 104 and the second sealing plate 105 block both ends of the middle layer to form a reaction zone 108. A vent hole 106 is opened on the second sealing plate 105, and the vent hole 106 communicates with the upper end plate 4. An air supply hole 107 is provided on the shell 101, and the air supply hole 107 communicates with the reaction zone 108. The upper and lower layers form the heat exchange channel 3, and the upper layer communicates with the combustion chamber 2. In this way, when the combustion chamber 2 is carrying out flameless combustion of methanol and water, its high-temperature gas flow is transferred from the upper layer to the lower layer and finally discharged to the outside. During this process, the reaction zone 108 in the middle layer absorbs the heat from the upper and lower layers to ensure the reaction efficiency of the catalyst and the reaction methanol and water in the middle layer. The middle layer, i.e. the reaction zone 108, is replenished with methanol and water through the reformed methanol water channel (which can be opened on the outer shell). The air supply hole 107 provided on the shell 101 provides air supply to ensure the materials required for the reaction in the reaction zone 108.

[0033] It should be noted that the reformed methanol water inlet is located on the shell 101. In order to prevent the methanol water entering the reaction chamber 1 from affecting the reaction efficiency due to low temperature, this design reserves a space in the upper part of the shell 101 (i.e., the upper part of the upper layer). The reformed methanol water inlet connects to this space and then flows to the reaction zone 108. This space is located in the upper part of the upper layer, which can preheat the reformed methanol water and ensure the reaction efficiency.

[0034] It should be noted that, in order to achieve the best reaction efficiency, this scheme, as shown in the diagram, has made the reaction zone 108 longitudinally divided. By dividing it longitudinally, the entire reaction zone 108 is made into a serpentine channel shape, which maximizes the contact reaction time between methanol and water and the catalyst, thereby achieving the maximum reaction efficiency.

[0035] The integrated fuel cell stack system of this utility model, such as Figures 1-6As shown, based on the technical solution described above, the combustion chamber 2 may also include a methanol-water preheating unit 201 and a flameless combustion heating unit 202 that are fixedly connected or integrally formed. The methanol-water preheating unit 201 and the flameless combustion heating unit 202 form a methanol-water heating zone. A flameless combustion catalyst is provided on the side of the flameless combustion heating unit 202 connected to the methanol-water preheating unit 201. A methanol inlet 2011 is provided on the methanol-water preheating unit 201, which is connected to the methanol-water heating zone. The methanol-water preheating unit 201 is connected to the heat exchange channel 3. A hydrogen channel 2012 is provided on the methanol-water preheating unit 201, and the reaction zone 108 is connected to the upper end plate 4 through the hydrogen channel 2012. Thus, the principle of the flameless combustion heating unit 202 is to generate heat by reacting combustion methanol-water with a flameless combustion catalyst. The flameless combustion heating unit 202 in this scheme adopts a back plate structure with a hollow structure on the back plate. The flameless combustion catalyst is placed in the hollow position and reacts with combustion methanol-water to release heat. Since the combustion methanol-water preheating unit 201 and the flameless combustion heating unit 202 form a combustion methanol-water heating zone, and the combustion methanol-water heating zone is connected to the heat exchange channel 3, the heat generated by the reaction will enter the heat exchange channel 3 to provide heat for the reaction zone 108. The combustion methanol inlet 2011 is to provide combustion methanol to the flameless combustion heating unit 202. When the flameless combustion heating unit 202 reacts, it will also heat the combustion methanol-water entering through the combustion methanol inlet 2011, thus realizing the combustion methanol-water preheating function.

[0036] One point to note is that the methanol-water combustion preheating unit 201 is equipped with a hydrogen channel 2012. The reaction zone 108 is connected to the upper end plate 4 through the hydrogen channel 2012. After the reaction zone 108 absorbs heat and reacts, the generated hydrogen needs to be transported to the fuel cell stack. If it were to be transported through a pipeline, it would undoubtedly increase the complexity of the equipment. Therefore, this solution provides a hydrogen channel 2012 on the methanol-water combustion preheating unit 201, and the hydrogen is directly transported to the fuel cell stack through the hydrogen channel 2012, resulting in a higher level of integration of the overall equipment.

[0037] The integrated fuel cell stack system of this utility model, such as Figures 1-6As shown, based on the previously described technical solution, the methanol-water combustion preheating unit 201 can also be divided into a gas dispersion zone 2013 and a methanol combustion heat exchange zone 2014 on the side facing the reaction chamber 1. The gas dispersion zone 2013 is connected to the upper layer, and the methanol combustion heat exchange zone 2014 is connected to the lower layer. In this way, the gas dispersion zone 2013 is mainly used to disperse the gas generated during the preheating process, preventing gas accumulation inside the preheating unit, ensuring smooth gas flow, and improving preheating efficiency. The methanol combustion heat exchange zone 2014 focuses on preheating the incoming methanol-water combustion, using the heat generated by the preheating unit to increase the temperature of the methanol-water combustion, allowing it to participate more fully in the flameless combustion reaction, further improving the overall thermal efficiency of the system. This design makes the function of the preheating unit more clearly defined, ensuring smooth gas dispersion and effective preheating of the methanol-water combustion, enhancing the system's integration and operating efficiency.

[0038] The integrated fuel cell stack system of this utility model, such as Figures 1-6 As shown, based on the previously described technical solution, it can also be: the methanol-water combustion preheating unit 201 is provided with a hydrogen outlet 2015 and an air inlet 2016. The hydrogen channel 2012 is connected to the upper end plate 4 through the hydrogen outlet 2015, and the methanol-water combustion heating zone is connected to the upper end plate 4 through the air inlet 2016. In this way, by setting the hydrogen outlet 2015, the hydrogen generated in the reaction chamber 1 can be directly introduced into the fuel cell stack through the methanol-water combustion preheating unit 201, and no additional pipeline is required in the overall interconnected structure. The air inlet 2016 is for air supply during flameless combustion. There are two ways to supply air: one is to connect directly to the outside to absorb outside air, and the other is to connect to the upper end plate 4 in this solution to recover the exhaust gas from the fuel cell stack cathode, realizing multi-stage utilization of air.

[0039] The integrated fuel cell stack system of this utility model, such as Figures 1-6 As shown, based on the previously described technical solution, it can also be: the methanol-water combustion preheating unit 201 is further provided with a reflux hole 2017, and the upper end plate 4 is connected to the methanol-water combustion heating zone through the reflux hole 2017. In this way, during the actual reaction process, the reaction chamber 1 generates hydrogen through methanol-water reforming, and the hydrogen enters the fuel cell stack for power generation. However, the reaction efficiency on the reaction chamber 1 side is not 100%, so the hydrogen will contain a small amount of methanol-water vapor. After the fuel cell stack finishes generating electricity using hydrogen, its exhaust gas will still contain the aforementioned methanol-water vapor. By setting the reflux hole 2017, the residual methanol-water vapor is recovered to the methanol-water combustion heating zone for flameless combustion.

[0040] The integrated fuel cell stack system of this utility model, such as Figures 1-6As shown, based on the technical solution described above, another option is to embed a heating rod 2018 on the methanol-water combustion preheating unit 201. In this way, during the initial stage of methanol-water combustion, the temperature is low and the combustion efficiency is not high. To ensure the combustion efficiency of methanol-water, this solution uses the heating rod 2018 to initially heat the methanol-water. Once the combustion of methanol-water stabilizes, the heating rod 2018 can be stopped.

[0041] The integrated fuel cell stack system of this utility model, such as Figures 1-6 As shown, based on the previously described technical solution, the upper end plate 4 can also be configured with an air inlet channel 401, an air outlet channel 402, a hydrogen inlet channel 403, and a tail gas outlet channel 404. The air inlet channel 401 is connected to the air preheating heat exchanger 7 through the first air inlet hole. The air outlet channel 402 is connected to the air inlet hole 2016. The hydrogen inlet channel 403 is connected to the hydrogen channel 2012 through the hydrogen outlet hole 2015. The tail gas outlet channel 404 is connected to the reflux hole 2017. This design ensures smooth flow of air and hydrogen in the system. Air enters the air preheating heat exchanger 7 through the air inlet channel 401 for preheating, and the preheated air then enters the reaction chamber 1 through the air outlet channel 402 to provide the required oxygen for methanol-water reforming. Simultaneously, hydrogen enters the fuel cell stack through the hydrogen inlet channel 403 to generate electricity. After power generation, the exhaust gas (including unreacted hydrogen and potentially residual methanol-water vapor) is discharged through the exhaust gas outlet channel 404 and connected to the return port 2017, thereby recovering the methanol-water vapor in the exhaust gas to the methanol-water combustion heating zone for flameless combustion, achieving full utilization of resources and environmental protection and energy conservation. This structural design not only improves the overall efficiency of the system but also effectively reduces the emission of harmful substances, meeting the requirements of modern industry for environmental protection and energy conservation.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated fuel cell stack system, comprising a reformer and a fuel cell stack, characterized in that: The reformer includes a sealed reaction chamber (1) and a combustion chamber (2). A heat exchange channel (3) is provided inside the reaction chamber (1). Methanol combustion is connected to the heat exchange channel (3) through the combustion chamber (2). The reaction chamber (1) is heat exchanged with the heat exchange channel. The fuel cell stack includes an upper end plate (4), a power generation component (5), and a lower end plate (6) that are detachably connected from top to bottom. The upper end plate (4) is connected to the reaction chamber (1) through the combustion chamber (2). A first air inlet is provided on the upper end plate (4). The combustion chamber (2) is detachably mounted on the upper end plate (4).

2. The integrated fuel cell stack system according to claim 1, characterized in that: It also includes an air preheating heat exchanger (7), which is heat exchanged and connected to one side of the reaction chamber (1). The first air inlet is connected to the air preheating heat exchanger (7), and a second air inlet (701) is provided on the air preheating heat exchanger (7).

3. The integrated fuel cell stack system according to claim 2, characterized in that: The reaction chamber (1) includes a shell (101), an upper partition (102), a lower partition (103), a first sealing plate (104), and a second sealing plate (105). The upper partition (102) and the lower partition (103) are arranged in parallel space inside the shell (101). The upper partition (102) and the lower partition (103) divide the space into upper, middle, and lower layers. The first sealing plate (104) and the second sealing plate (105) block the two ends of the middle layer to form a reaction zone (108). A vent hole (106) is opened on the second sealing plate (105). The vent hole (106) is connected to the upper end plate (4). An air supply hole (107) is provided on the shell (101). The air supply hole (107) is connected to the reaction zone (108). The upper and lower layers form the heat exchange channel (3). The upper layer is connected to the combustion chamber (2).

4. The integrated fuel cell stack system according to claim 3, characterized in that: The combustion chamber (2) includes a methanol-water preheating unit (201) and a flameless combustion heating unit (202) that are fixedly connected or integrally formed. The methanol-water preheating unit (201) and the flameless combustion heating unit (202) form a methanol-water heating zone. A flameless combustion catalyst is provided on the side of the flameless combustion heating unit (202) connected to the methanol-water preheating unit (201). A methanol inlet (2011) is provided on the methanol-water preheating unit (201), which is connected to the methanol-water heating zone. The methanol-water preheating unit (201) is connected to the heat exchange channel (3). A hydrogen channel (2012) is provided on the methanol-water preheating unit (201). The reaction zone (108) is connected to the upper end plate (4) through the hydrogen channel (2012).

5. The integrated fuel cell stack system according to claim 4, characterized in that: The methanol-water preheating unit (201) facing the reaction chamber (1) is divided into a gas dispersion zone (2013) and a methanol-fired heat exchange zone (2014). The gas dispersion zone (2013) is connected to the upper layer, and the methanol-fired heat exchange zone (2014) is connected to the lower layer.

6. The integrated fuel cell stack system according to claim 5, characterized in that: The methanol-water combustion preheating unit (201) is provided with a hydrogen outlet (2015) and an air inlet (2016). The hydrogen channel (2012) is connected to the upper end plate (4) through the hydrogen outlet (2015), and the methanol-water combustion heating zone is connected to the upper end plate (4) through the air inlet (2016).

7. The integrated fuel cell stack system according to claim 6, characterized in that: The methanol-water preheating unit (201) is also provided with a reflux hole (2017), and the upper end plate (4) is connected to the methanol-water heating zone through the reflux hole (2017).

8. The integrated fuel cell stack system according to claim 4, characterized in that: A heating rod (2018) is embedded in the methanol-water preheating unit (201).

9. The integrated fuel cell stack system according to claim 7, characterized in that: The upper end plate (4) is provided with an air intake channel (401), an air outlet channel (402), a hydrogen intake channel (403), and a tail gas outlet channel (404). The air intake channel (401) is connected to the air preheating heat exchanger (7) through the first air intake hole. The air outlet channel (402) is connected to the air inlet (2016). The hydrogen intake channel (403) is connected to the hydrogen channel (2012) through the hydrogen outlet (2015). The tail gas outlet channel (404) is connected to the return hole (2017).

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