Reformer and fuel cell

Abstract

This invention belongs to the field of fuel cell technology and discloses a reformer and a fuel cell. The reformer includes a reforming unit with an inner cavity. A partition divides the inner cavity into a gas chamber and a heat exchange chamber. The heat exchange chamber is used for the entry of heat exchange gas. The partition is made of a thermally conductive material. Along a first direction, the reforming unit has a first end and a second end. The gas chamber includes a first transition chamber, a reforming chamber located on one side of the first partition, and a gas heat exchange chamber located on the other side of the first partition. The reforming chamber and the gas heat exchange chamber are connected only through the first transition chamber. The reforming chamber has a gas inlet, and the gas heat exchange chamber has a gas outlet. A catalyst for reforming the gas is disposed in the reforming chamber. The first transition chamber is located at the first end, and the gas inlet and gas outlet are both located at the second end. For reformers of the same size or specifications, this arrangement can increase the path length of the gas flow channel, thereby improving the heat exchange effect of the gas.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and more particularly to reformers and fuel cells. Background Technology

[0002] In solid oxide fuel cell systems, in addition to traditional hydrogen, hydrocarbon gases such as methane, biogas, methanol, and ethanol can be used as fuels for fuel cells. However, except for hydrogen and carbon monoxide, other hydrocarbon fuels must undergo catalytic reforming before being supplied to the fuel cell stack.

[0003] In a reformer, the fuel gas needs to be heated and catalyzed. For example, existing technology provides a reformer with an airflow channel for the fuel gas and a heating channel for the high-temperature flue gas from the solid oxide fuel cell. The fuel gas undergoes reforming within the airflow channel and is heated by the high-temperature flue gas. However, a problem exists: due to the space requirements of the fuel cell system, the size of the reformer cannot be too large. Consequently, the fuel gas airflow channel is generally short, which can easily lead to incomplete and uneven heat exchange. Summary of the Invention

[0004] According to one aspect of the present invention, the present invention provides a reformer to solve the problem that the gas flow channel of fuel gas in the prior art is generally short, which easily leads to incomplete heat exchange and uneven heat exchange.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A reformer for reforming fuel gas in a fuel cell; comprising a reforming unit having an inner cavity and including a partition disposed in the inner cavity and a first partition strip, the partition dividing the inner cavity into a fuel gas cavity and a heat exchange gas cavity, the heat exchange gas cavity for the entry of heat exchange gas, the partition being made of a thermally conductive material, and the reforming unit having a first end and a second end along a first direction;

[0007] The gas chamber includes a first transition chamber, a reforming chamber located on one side of the first partition bar, and a gas heat exchange chamber located on the other side of the first partition bar. The reforming chamber and the gas heat exchange chamber are connected only through the first transition chamber. The reforming chamber has a gas inlet, and the gas heat exchange chamber has a gas outlet. A catalyst for reforming the gas is disposed in the reforming chamber. The first transition chamber is located at the first end, and the gas inlet and the gas outlet are both located at the second end.

[0008] As a preferred embodiment of the reformer, the reforming unit further includes a second partition bar. The heat exchange chamber includes a second transition chamber, a first heat exchange chamber located on one side of the second partition bar, and a second heat exchange chamber located on the other side of the second partition bar. The reforming chamber is positioned opposite the first heat exchange chamber, and the gas heat exchange chamber is positioned opposite the second heat exchange chamber. The first heat exchange chamber and the second heat exchange chamber are connected only through the second transition chamber. The first heat exchange chamber has a heat exchange gas inlet, and the second heat exchange chamber has a heat exchange gas outlet. The second transition chamber is located at the second end, and both the heat exchange gas inlet and the heat exchange gas outlet are located at the first end.

[0009] As a preferred embodiment of the reformer, the heat exchange gas entering and exiting the heat exchange chamber is air, and the heat exchange chamber is connected to the air inlet of the fuel cell stack.

[0010] As a preferred embodiment of the reformer, it further includes a first fin disposed in the reforming chamber and a second fin disposed in the gas heat exchange chamber. The first fin divides the reforming chamber into multiple reforming channels, and the extension direction of the multiple reforming channels is parallel to the first direction. The second fin divides the gas heat exchange chamber into multiple gas heat exchange channels, and the extension direction of the multiple gas heat exchange channels is parallel to the first direction. Both the first fin and the second fin are in contact with the partition plate and are made of thermally conductive material.

[0011] As a preferred embodiment of the reformer, the cross-section of the reforming channel is rectangular, isosceles trapezoidal, or Ω-shaped; the cross-section of the gas heat exchange channel is rectangular, isosceles trapezoidal, or Ω-shaped.

[0012] As a preferred embodiment of the reformer, the width of the reforming chamber along the second direction is greater than the width of the gas heat exchange chamber along the second direction, the second direction is parallel to the partition, and the second direction is perpendicular to the first direction.

[0013] As a preferred embodiment of the reformer, multiple reforming units are provided, and the multiple reforming units are stacked sequentially.

[0014] As a preferred embodiment of the reformer, the first transition cavity has a first sidewall, a second sidewall, and a third sidewall connected in sequence on the side away from the first partition bar. The first sidewall is connected to the sidewall of the reforming cavity, the third sidewall is connected to the sidewall of the gas heat exchange cavity, and the second sidewall is arc-shaped.

[0015] According to another aspect of the invention, a fuel cell is provided, comprising the aforementioned reformer and a fuel cell stack, wherein the gas outlet of the reformer is in communication with the reactant gas inlet of the fuel cell stack.

[0016] As a preferred embodiment of the fuel cell, the heat exchange gas entering and exiting the heat exchange chamber is air. The heat exchange chamber is connected to the air inlet of the fuel cell stack. The fuel cell also includes an air preheater, which is located upstream of the reformer along the air flow direction and is used to heat the air.

[0017] The beneficial effects of this invention are:

[0018] This invention provides a reformer for reforming fuel gas in a fuel cell, comprising a reforming unit having an inner cavity and including a partition and a first partition strip disposed within the inner cavity. The partition divides the inner cavity into a fuel gas cavity and a heat exchange gas cavity, the heat exchange gas cavity being used for the entry of heat exchange gas. The partition is made of a thermally conductive material. Along a first direction, the reforming unit has a first end and a second end. The fuel gas cavity includes a first transition cavity, a reforming cavity located on one side of the first partition strip, and a fuel gas heat exchange cavity located on the other side of the first partition strip. The reforming cavity and the fuel gas heat exchange cavity are connected only through the first transition cavity. The reforming cavity has a fuel gas inlet, and the fuel gas heat exchange cavity has a fuel gas outlet. A catalyst for reforming the fuel gas is disposed within the reforming cavity. The first transition cavity is located at the first end, and both the fuel gas inlet and the fuel gas outlet are located at the second end, so that the fuel gas enters through the fuel gas inlet located at the second end and is reformed by the catalyst within the reforming cavity, while being heated by the heat exchange gas. Subsequently, the fuel gas enters the fuel gas heat exchange cavity through the first transition cavity, where it is further heated by the heat exchange gas. This configuration increases the path length of the gas flow channel for reformers of the same size or specifications, thereby improving the heat exchange effect of the gas.

[0019] The present invention also provides a fuel cell including the above-mentioned reformer, which can increase the path length of the gas flow channel, thereby improving the heat exchange effect of the gas. In addition, the fuel cell also includes a stack, wherein the gas outlet of the reformer is connected to the reaction gas inlet of the stack, thereby providing the stack with reformed gas. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the reformer in an embodiment of the present invention;

[0021] Figure 2 This is a partial structural diagram of the reformer in an embodiment of the present invention. Figure 1 ;

[0022] Figure 3 This is a partial structural diagram of the reformer in an embodiment of the present invention. Figure 2 ;

[0023] Figure 4 This is a partial structural diagram of the reformer in an embodiment of the present invention. Figure 3 ;

[0024] Figure 5This is a schematic diagram of the structure of one type of first fin in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of another first fin structure in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of another first fin in an embodiment of the present invention.

[0027] In the picture:

[0028] 1. Reforming unit; 2. Partition; 3. First partition bar; 4. Second partition bar; 5. First fin; 6. Second fin;

[0029] 100. Inner cavity;

[0030] 110. Gas chamber; 111. Reforming chamber; 112. First transition chamber; 113. Gas heat exchange chamber;

[0031] 120. Heat exchange chamber; 121. First heat exchange chamber; 122. Second transition chamber; 123. Second heat exchange chamber. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0033] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0036] In solid oxide fuel cell systems, hydrocarbon fuels undergo catalytic reforming before being supplied to the stack. In the reformer, the fuel gas is heated and catalytically reacted. For example, existing technology provides a reformer with an airflow channel for the fuel gas and a heating channel for the high-temperature flue gas from the solid oxide fuel cell. The fuel gas undergoes reforming within the airflow channel and is heated by the high-temperature flue gas. However, a problem arises: due to space constraints in the fuel cell system, the reformer's size cannot be too large. Consequently, the fuel gas airflow channel is generally short, which can easily lead to incomplete and uneven heat exchange.

[0037] To address the aforementioned issues, this embodiment provides a reformer to solve the problem that the gas flow channels for fuel gas in the prior art are generally short, which easily leads to incomplete and uneven heat exchange.

[0038] Reference Figures 1-4The reformer is used to reform the fuel gas in the fuel cell. In this embodiment, the reformer is specifically used in a solid oxide fuel cell, but in other embodiments, it can also be used in other types of fuel cells. The reformer includes a reforming unit 1, which has an inner cavity 100 and includes a partition 2 and a first partition bar 3 disposed in the inner cavity 100. The partition 2 divides the inner cavity 100 into a fuel gas cavity 110 and a heat exchange gas cavity 120. The heat exchange gas cavity 120 is used for the entry of heat exchange gas. The partition 2 is made of a thermally conductive material, so that the fuel gas located in the fuel gas cavity 110 can exchange heat with the heat exchange gas located in the heat exchange gas cavity 120 through the partition 2. Along the first direction, the reforming unit 1 has a first end and a second end; the gas chamber 110 includes a first transition chamber 112, a reforming chamber 111 located on one side of the first partition bar 3, and a gas heat exchange chamber 113 located on the other side of the first partition bar 3. The reforming chamber 111 and the gas heat exchange chamber 113 are connected only through the first transition chamber 112. The reforming chamber 111 has a gas inlet, and the gas heat exchange chamber 113 has a gas outlet. A catalyst for reforming the gas is disposed in the reforming chamber 111. The first transition chamber 112 is located at the first end, and the gas inlet and gas outlet are both located at the second end. The gas inlet and gas outlet can be separated by the first partition bar 3. Thus, the gas enters through the gas inlet located at the second end and is reformed by the catalyst in the reforming chamber 111, while being heated by the heat exchange gas. Subsequently, the gas enters the gas heat exchange chamber 113 through the first transition chamber 112, where it is further heated by the heat exchange gas. This configuration increases the path length of the gas flow channel for reformers of the same size or specifications, thereby improving the heat exchange effect of the gas.

[0039] Continue to refer to Figures 1-4The reforming unit 1 also includes a second partition bar 4. The heat exchange chamber 120 includes a second transition chamber 122, a first heat exchange chamber 121 located on one side of the second partition bar 4, and a second heat exchange chamber 123 located on the other side of the second partition bar 4. The reforming chamber 111 is positioned opposite the first heat exchange chamber 121, and the gas heat exchange chamber 113 is positioned opposite the second heat exchange chamber 123, so that the gas in the reforming chamber 111 can exchange heat with the heat exchange gas in the first heat exchange chamber 121, and the gas in the gas heat exchange chamber 113 can exchange heat with the heat exchange gas in the second heat exchange chamber 123. The first heat exchange chamber 121 and the second heat exchange chamber 123 are connected only through the second transition chamber 122. The first heat exchange chamber 121 has a heat exchange gas inlet, and the second heat exchange chamber 123 has a heat exchange gas outlet. The second transition chamber 122 is located at the second end, and the heat exchange gas inlet and outlet are both located at the first end. This configuration allows the heat exchange gas to enter the first heat exchange chamber 121 through the heat exchange gas inlet located at the first end, and exchange heat with the fuel gas located in the reforming chamber 111. Furthermore, the heat exchange gas passes through the second transition chamber 122 into the second heat exchange chamber 123, where it exchanges heat with the fuel gas located in the fuel gas heat exchange chamber 113. In addition, the flow direction of the heat exchange gas is opposite to that of the fuel gas, resulting in uniform heating of the fuel gas and minimal temperature differences.

[0040] Optionally, the first dividing strip 3 and the second dividing strip 4 are arranged opposite each other, and both the first dividing strip 3 and the second dividing strip 4 extend along the first direction. The first dividing strip 3 and the second dividing strip 4 are made of heat-insulating material and do not participate in heat conduction, so that the gas located in the reforming chamber 111 can only exchange heat with the heat exchange gas located in the first heat exchange chamber 121, and the gas located in the gas heat exchange chamber 113 can only exchange heat with the heat exchange gas located in the second heat exchange chamber 123.

[0041] Continue to refer to Figures 1-4 In some embodiments, the heat exchange gas entering and exiting the heat exchange chamber 120 is the high-temperature flue gas discharged from the fuel cell. However, this approach has the problem that an exhaust pipe for high-temperature flue gas discharge and an intake pipe for air intake are still required between the reformer and the fuel cell stack, resulting in a complex overall fuel cell structure. In this embodiment, the heat exchange gas entering and exiting the heat exchange chamber 120 is air, and the heat exchange chamber 120 is connected to the air inlet of the fuel cell stack. This allows the air discharged from the reformer to directly enter the fuel cell stack and participate in the reaction as an oxidizing gas, resulting in a simpler structure.

[0042] Continue to refer to Figures 1-4The reformer also includes a first fin 5 disposed in the reforming chamber 111 and a second fin 6 disposed in the gas heat exchange chamber 113. The first fin 5 divides the reforming chamber 111 into multiple reforming channels, and the extension direction of the multiple reforming channels is parallel to the first direction. The second fin 6 divides the gas heat exchange chamber 113 into multiple gas heat exchange channels, and the extension direction of the multiple gas heat exchange channels is parallel to the first direction. Both the first fin 5 and the second fin 6 are in contact with the partition plate 2 and are both made of thermally conductive material. By setting the first fin 5 and the second fin 6, the reforming chamber 111 and the gas heat exchange chamber 113 can be divided into multiple channels. The gas flow velocity in each channel is the same. Both the first fin 5 and the second fin 6 are made of thermally conductive material and are in contact with the partition plate 2. Heat can be transferred to the first fin 5 and the second fin 6 through the partition plate 2, and the first fin 5 and the second fin 6 complete the heat exchange with the gas, which can increase the heat exchange area.

[0043] Similarly, the reformer also includes a third fin disposed in the first heat exchange chamber 121 and a fourth fin disposed in the second heat exchange chamber 123. The third fin divides the first heat exchange chamber 121 into multiple first heat exchange channels, and the extension direction of the multiple first heat exchange channels is parallel to the first direction. The fourth fin divides the second heat exchange chamber 123 into multiple second heat exchange channels, and the extension direction of the multiple second heat exchange channels is parallel to the first direction. Both the third fin and the fourth fin are in contact with the partition plate 2 and are made of thermally conductive material, and have similar technical effects as the first fin 5 and the second fin 6.

[0044] The reforming channel has a rectangular, isosceles trapezoidal, or Ω-shaped cross-section; the gas heat exchange channel also has a rectangular, isosceles trapezoidal, or Ω-shaped cross-section. Taking the first fin 5 as an example... Figure 5 The cross-section of the reforming channel is shown to be rectangular. Figure 6 The cross-section of the reforming channel is shown to be an isosceles trapezoid. Figure 7 The diagram shows an Ω-shaped cross-section of the reforming channel, allowing the user to select the appropriate first fin 5 according to their needs. In this embodiment, the reforming channel has a rectangular cross-section, and the width of the gas heat exchange channel along the second direction is greater than the width of the reforming channel along the second direction. The second direction is parallel to the partition 2 and perpendicular to the first direction, which is the... Figures 1-4 In the direction AB, the second direction is... Figures 1-4 The CD direction in the diagram, the vertical direction is... Figures 1-4 The EF direction in the equation.

[0045] Since the sidewalls of the reforming channel need to be fitted with catalysts for reforming the gas, to increase the amount of catalyst in the reforming chamber 111, the width of the reforming chamber 111 along the second direction is greater than the width of the gas heat exchange chamber 113 along the second direction. This results in a larger volume for the reforming chamber 111 than for the gas heat exchange chamber 113, facilitating the placement of more catalysts. Furthermore, the width of the gas heat exchange channel along the second direction is greater than the width of the reforming channel along the second direction, further increasing the number of reforming channels and increasing the contact area between the gas and the first fin 5. The catalyst can then be placed on the surface of the first fin 5 to further increase the contact area between the gas and the catalyst.

[0046] Continue to refer to Figures 1-4 Multiple reforming units 1 are provided, and the multiple reforming units 1 are stacked sequentially. The gas inlets of the multiple reforming units 1 are all connected to the total gas inlet of the fuel cell, and the gas outlets of the multiple reforming units 1 are all connected to the reaction gas inlet of the fuel cell stack. The heat exchange gas inlets of the multiple reforming units 1 are all connected to the total heat exchange gas inlet of the fuel cell, and the heat exchange gas outlets of the multiple reforming units 1 are all connected to the air inlet of the fuel cell stack.

[0047] Continue to refer to Figures 1-4 The first transition cavity 112 has a first sidewall, a second sidewall, and a third sidewall connected in sequence on the side away from the first partition strip 3. The first sidewall is connected to the sidewall of the reforming cavity 111, and the third sidewall is connected to the sidewall of the gas heat exchange cavity 113. The second sidewall is arc-shaped, thus allowing a smooth transition between the first and third sidewalls. The second sidewall guides the gas flow and avoids excessive differences in gas flow velocity. In this embodiment, the overall shape of the first transition cavity 112 is wing-shaped. Furthermore, the second transition cavity 122 also adopts a similar structure to guide the heat exchange gas flow and avoid excessive differences in heat exchange gas flow velocity.

[0048] This embodiment also provides a fuel cell. In this embodiment, the fuel cell is a solid oxide fuel cell. In other embodiments, it can be other types of fuel cells, and there is no limitation thereto. It includes the aforementioned reformer, which can increase the path length of the gas flow channel, thereby improving the heat exchange effect of the gas. Furthermore, the fuel cell also includes a stack. The gas outlet of the reformer is connected to the reactant gas inlet of the stack, thereby providing the stack with reformed gas.

[0049] The heat exchange gas entering and exiting the heat exchange chamber 120 is air. The heat exchange chamber 120 is connected to the air inlet of the fuel cell stack, thus eliminating the need to introduce high-temperature flue gas into the reformer. However, this approach requires preheating the air. Specifically, the fuel cell also includes an air preheater, located upstream of the reformer along the airflow direction, and used to heat the air. The heat source for heating the air can be high-temperature flue gas or other heating sources, such as electric heating sources.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A reformer for reforming fuel gas in a fuel cell; characterized in that, The reforming unit (1) includes an inner cavity (100) and includes a partition (2) disposed in the inner cavity (100) and a first partition (3). The partition (2) divides the inner cavity (100) into a combustion chamber (110) and a heat exchange chamber (120). The heat exchange chamber (120) is used for the entry of heat exchange gas. The partition (2) is made of a thermally conductive material. Along a first direction, the reforming unit (1) has a first end and a second end. The gas chamber (110) includes a first transition chamber (112), a reforming chamber (111) located on one side of the first partition (3), and a gas heat exchange chamber (113) located on the other side of the first partition (3). The reforming chamber (111) and the gas heat exchange chamber (113) are connected only through the first transition chamber (112). The reforming chamber (111) has a gas inlet, and the gas heat exchange chamber (113) has a gas outlet. A catalyst for reforming the gas is provided in the reforming chamber (111). The first transition chamber (112) is located at the first end, and the gas inlet and the gas outlet are both located at the second end. The reforming unit (1) further includes a second partition (4). The heat exchange chamber (120) includes a second transition chamber (122), a first heat exchange chamber (121) located on one side of the second partition (4), and a second heat exchange chamber (123) located on the other side of the second partition (4). The reforming chamber (111) is arranged opposite to the first heat exchange chamber (121), and the gas heat exchange chamber (113) is arranged opposite to the second heat exchange chamber (123). The first heat exchange chamber (121) and the second heat exchange chamber (123) are connected only through the second transition chamber (122). The first heat exchange chamber (121) has a heat exchange gas inlet, and the second heat exchange chamber (123) has a heat exchange gas outlet. The second transition chamber (122) is located at the second end, and the heat exchange gas inlet and the heat exchange gas outlet are both located at the first end.

2. The reformer according to claim 1, characterized in that, The heat exchange gas entering and exiting the heat exchange chamber (120) is air, and the heat exchange chamber (120) is connected to the air inlet of the fuel cell stack.

3. The reformer according to claim 1 or 2, characterized in that, It also includes a first fin (5) disposed in the reforming chamber (111) and a second fin (6) disposed in the gas heat exchange chamber (113). The first fin (5) divides the reforming chamber (111) into multiple reforming channels, and the extension direction of the multiple reforming channels is parallel to the first direction. The second fin (6) divides the gas heat exchange chamber (113) into multiple gas heat exchange channels, and the extension direction of the multiple gas heat exchange channels is parallel to the first direction. The first fin (5) and the second fin (6) are both in contact with the partition (2) and are both made of thermally conductive material.

4. The reformer according to claim 3, characterized in that, The cross-section of the reforming channel is rectangular, isosceles trapezoidal, or Ω-shaped; the cross-section of the gas heat exchange channel is rectangular, isosceles trapezoidal, or Ω-shaped.

5. The reformer according to claim 1 or 2, characterized in that, The width of the reforming chamber (111) along the second direction is greater than the width of the gas heat exchange chamber (113) along the second direction. The second direction is parallel to the partition (2) and perpendicular to the first direction.

6. The reformer according to claim 1 or 2, characterized in that, Multiple reforming units (1) are provided, and the multiple reforming units (1) are stacked sequentially.

7. The reformer according to claim 1 or 2, characterized in that, The first transition cavity (112) has a first sidewall, a second sidewall and a third sidewall connected in sequence on the side away from the first partition bar (3). The first sidewall is connected to the sidewall of the reforming cavity (111), the third sidewall is connected to the sidewall of the gas heat exchange cavity (113), and the second sidewall is arc-shaped.

8. A fuel cell, characterized in that, The reformer includes any one of claims 1-7, and further includes an electric stack, wherein the gas outlet of the reformer is connected to the reactant gas inlet of the electric stack.

9. The fuel cell according to claim 8, characterized in that, The heat exchange gas entering and exiting the heat exchange chamber (120) is air. The heat exchange chamber (120) is connected to the air inlet of the fuel cell stack. The fuel cell also includes an air preheater. Along the air flow direction, the air preheater is located upstream of the reformer and is used to heat the air.

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