Air-cooled galvanic pile and fuel cell

Abstract

The utility model provides an air-cooled electric pile and a fuel cell. The air-cooled electric pile comprises a supporting assembly, a reaction assembly and a fan, the supporting assembly comprises a first supporting plate and a second supporting plate which are oppositely arranged, and a containing space is formed between the first supporting plate and the second supporting plate. The reaction component comprises membrane electrodes and bipolar plates, the membrane electrodes and the bipolar plates are alternately arranged and accommodated in the accommodating space, and the membrane electrodes and the bipolar plates positioned on two opposite sides of the membrane electrodes form reaction units. Wherein the bipolar plate comprises an air flow channel and a hydrogen flow channel which are respectively arranged on two opposite sides of the bipolar plate, one side of the membrane electrode is in contact with one side, provided with the air flow channel, of the bipolar plate, and the other side of the membrane electrode is in contact with one side, provided with the hydrogen flow channel, of the bipolar plate. The fan is arranged at one end of the air flow channel and used for providing air for the air flow channel. Thus, according to the scheme, through the design of the fan, the flowability of air in the air flow channel can be improved, heat dissipation of the air-cooled galvanic pile is achieved, the performance of the air-cooled galvanic pile is improved, and the service life of the air-cooled galvanic pile is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air-cooled fuel cells, in particular to an air-cooled stack and a fuel cell. BACKGROUND

[0002] The stack module is a core part of the fuel cell system, which is usually formed by stacking multiple fuel cell monomers in series. The main function of the stack module is to efficiently convert hydrogen energy into electrical energy. At present, the heat dissipation efficiency of the stack module on the market is insufficient, which affects the performance and service life of the stack module. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome the technical problems mentioned in the above technical background, the air-cooled stack provided by the embodiments of the present application comprises a support assembly, a reaction assembly and a fan.

[0004] The support assembly comprises a first support plate and a second support plate oppositely arranged in a first direction, and a containing space is formed between the first support plate and the second support plate.

[0005] The reaction assembly comprises a membrane electrode and a bipolar plate, the membrane electrode and the bipolar plate are alternately arranged in the first direction and contained in the containing space, and the membrane electrode and the bipolar plates located on opposite sides thereof form a reaction unit.

[0006] The bipolar plate comprises an air flow channel and a hydrogen flow channel arranged on opposite sides thereof, respectively, the air flow channel extends along a second direction, the first direction is perpendicular to the second direction, one side of the membrane electrode is in contact with the side of the bipolar plate provided with the air flow channel, and the other side of the membrane electrode is in contact with the side of the bipolar plate provided with the hydrogen flow channel.

[0007] The fan is arranged at one end of the air flow channel and used for providing air for the air flow channel.

[0008] In a possible implementation, the first support plate is provided with an air flow channel extending along the second direction on the side facing the second support plate, and the opposite sides of the membrane electrode close to the first support plate are in contact with the first support plate and the side of the bipolar plate provided with the hydrogen flow channel, respectively, to form a reaction unit.

[0009] The second support plate is provided with a hydrogen flow channel on the side facing the first support plate, and the opposite sides of the membrane electrode close to the second support plate are in contact with the second support plate and the side of the bipolar plate provided with the air flow channel, respectively, to form a reaction unit.

[0010] In a possible implementation, the number of the air flow channels is multiple, and the multiple air flow channels are arranged at equal intervals on one side of the bipolar plate and are in communication with each other.

[0011] The number of the hydrogen flow channels is multiple, and the multiple hydrogen flow channels are arranged in a meandering manner on the other side of the bipolar plate, wherein the hydrogen flow channels are uniformly distributed on the other side of the bipolar plate.

[0012] In a possible implementation, the air-cooled electric pile further comprises an electrode assembly.

[0013] The electrode assembly comprises a first electrode and a second electrode arranged oppositely in the first direction, wherein the first electrode is in contact with the first support plate and is located on a side of the first support plate away from the second support plate, and the second electrode is in contact with the second support plate and is located on a side of the second support plate away from the first support plate.

[0014] In a possible implementation, the air-cooled electric pile further comprises a fixing assembly and a fixing member.

[0015] The fixing assembly comprises a first fixing plate and a second fixing plate arranged oppositely in the first direction, wherein the first fixing plate is in contact with the first electrode and is located on a side of the first electrode away from the second electrode, and the second fixing plate is in contact with the second electrode and is located on a side of the second electrode away from the first electrode.

[0016] The first electrode protrudes relative to the first fixing plate, the second electrode protrudes relative to the second fixing plate, one end of the fan is fixed to the first fixing plate, and the other end of the fan is fixed to the second fixing plate.

[0017] The first fixing plate and the second fixing plate are provided with through holes at corresponding positions, and the fixing member fixes the first fixing plate and the second fixing plate through the through holes.

[0018] In a possible implementation, the bipolar plate further comprises an air inlet through hole and a drainage through hole, the air inlet through hole is in communication with the inlet of the hydrogen flow channel, and the drainage through hole is in communication with the outlet of the hydrogen flow channel.

[0019] The fixing assembly is provided with a hydrogen input interface and a drainage output interface, wherein the hydrogen input interface is in communication with the air inlet through hole, and the drainage output interface is in communication with the drainage through hole.

[0020] In a possible implementation, a projection of an air flow channel of the bipolar plate on one side of the membrane electrode overlaps with a projection of a hydrogen flow channel of the bipolar plate on the other side of the membrane electrode on the membrane electrode.

[0021] In a possible implementation, in a cross section perpendicular to the extending direction of the bipolar plate, a cross-sectional size of the air flow channel of the bipolar plate is a first size, and a cross-sectional size of the air flow channel of the bipolar plate is a second size, the first size being greater than the second size.

[0022] In a possible implementation, in a cross section perpendicular to the extending direction of the bipolar plate, cross-sectional shapes of the air flow channel and the hydrogen flow channel include a rectangle.

[0023] Another purpose of the present application is to provide a fuel cell comprising a gas supply device, a water storage device, and a plurality of the air-cooled stack provided by the present application, wherein the gas supply device is connected to a hydrogen input interface of the air-cooled stack, and the water storage device is connected to a water output interface of the air-cooled stack.

[0024] Based on any one of the above aspects, the embodiments of the present application provide an air-cooled stack and a fuel cell. In this way, the above scheme can increase the flowability of air in the air flow channel through the design of the fan, achieve heat dissipation of the air-cooled stack, and improve the performance and service life of the air-cooled stack. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be invoked in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0026] Figure 1 One of the schematic diagrams of the air-cooled stack provided by the present embodiment;

[0027] Figure 2 For Figure 1 The local enlarged view corresponding to the dashed line circle;

[0028] Figure 3 The second schematic diagram of the air-cooled stack provided by the present embodiment;

[0029] Figure 4 The schematic diagram of the air flow channel of the bipolar plate provided by the present embodiment;

[0030] Figure 5 The schematic diagram of the hydrogen flow channel of the bipolar plate provided by the present embodiment;

[0031] Figure 6 A cross-sectional view of the air-cooled stack along the B-B section line shown in the embodiment provided by the present application Figure 3

[0032] Figure 7 Figure 6

[0033] Figure: 1-air-cooled stack, 10-support assembly, 100-first support plate, 110-second support plate, 20-reaction assembly, 200-membrane electrode, 210-bipolar plate, 2101-air flow channel, 2102-hydrogen flow channel, 2103-gas inlet through hole, 2104-drainage through hole, 30-fan, 40-electrode assembly, 400-first electrode, 410-second electrode, 50-fixing assembly, 500-first fixing plate, 510-second fixing plate, 60-fixing member, 70-hydrogen input interface, 80-drainage output interface. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the scope of protection of the present application.

[0036] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0037] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms “up”, “down” and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product of the present application is usually placed, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms “first”, “second” and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.​​​

[0038] It should be noted that the different features in the embodiments of the present application can be combined with each other without conflict.

[0039] The inventor found that the heat dissipation efficiency of the stack module is not high in the field of hydrogen energy fuel cell system at present, and the market usually uses increasing the reaction area to expand the heat dissipation area. This method involves a large number of bipolar plates, which increases the volume and weight of the stack module, thereby affecting the performance and service life of the stack module. Therefore, the inventor innovatively designs the following technical scheme, and the specific implementation scheme of the present application will be described in detail below in combination with the drawings.

[0040] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 is a schematic diagram of an air-cooled stack 1 provided by the present embodiment, Figure 2 is a local enlarged view of the dashed circle in Figure 1 , Figure 3 is a schematic diagram of an air-cooled stack 1 provided by the present embodiment. The air-cooled stack 1 comprises a support assembly 10, a reaction assembly 20 and a fan 30, the support assembly 10 comprises a first support plate 100 and a second support plate 110 oppositely arranged in a first direction A1, and a containing space is formed between the first support plate 100 and the second support plate 110.

[0041] In the present embodiment, the support assembly 10 comprises a first support plate 100 and a second support plate 110 oppositely arranged in a first direction A1, and the first support plate 100 and the second support plate 110 together form a containing space for containing the reaction assembly 20 and play a preliminary supporting role on the reaction assembly 20.

[0042] The reaction assembly 20 comprises a membrane electrode 200 and a bipolar plate 210, the membrane electrode 200 and the bipolar plate 210 are alternately arranged in the first direction A1 and contained in the containing space, and the membrane electrode 200 and the bipolar plate 210 located on the opposite sides thereof form a reaction unit.

[0043] Among them, please refer to Figure 4 and Figure 5 , Figure 4 is a schematic diagram of the air flow channel 2101 of the bipolar plate 210 provided by the present embodiment, Figure 5A schematic view of the hydrogen flow channel 2102 of the bipolar plate 210 provided in the present embodiment. The bipolar plate 210 comprises the air flow channel 2101 and the hydrogen flow channel 2102 arranged on opposite sides of the bipolar plate 210 respectively, the air flow channel 2101 extends along the second direction A2, the first direction A1 can be perpendicular to the second direction A2, one side of the membrane electrode 200 contacts the side of the bipolar plate 210 provided with the air flow channel 2101, and the other side of the membrane electrode 200 contacts the side of the bipolar plate 210 provided with the hydrogen flow channel 2102.

[0044] In the present embodiment, the reaction assembly 20 as the core part of the air-cooled stack 1 for performing the electrochemical reaction, comprises the membrane electrode 200 and the bipolar plate 210. The bipolar plate 210 forms a double-sided flow channel structure by optimizing the design of the gas flow channel, comprising the air flow channel 2101 and the hydrogen flow channel 2102 arranged on opposite sides of the bipolar plate 210, and through the way of the membrane electrode 200 and the bipolar plate 210 arranged alternately in the first direction A1, so that one side of the membrane electrode 200 contacts the side of the bipolar plate 210 provided with the air flow channel 2101, and the other side contacts the side provided with the hydrogen flow channel 2102, forming a plurality of independent reaction units, and improving the reaction efficiency. At the same time, the bipolar plate 210 also isolates the air flow channel 2101 and the hydrogen flow channel 2102 on the same bipolar plate 210, ensuring that the reaction gases will not mix inside the air-cooled stack 1, thereby avoiding potential safety risks.

[0045] The fan 30 is arranged at one end of the air flow channel 2101 for providing air for the air flow channel 2101.

[0046] In the present embodiment, the air flow channel 2101 on one side of the bipolar plate 210 extends along the second direction A2, and the air flow channel 2101 of the bipolar plate 210 and the membrane electrode 200 in contact with it form an air flow channel 2101 inlet and an air flow channel 2101 outlet. Arranging the fan 30 at one end of the air flow channel 2101, that is, arranging the fan 30 towards the air flow channel 2101 inlet, not only can provide the reaction gas (air) for the air flow channel 2101, but also effectively take away the heat generated in the reaction process by forced convection, achieving the heat dissipation of the air-cooled stack 1.

[0047] Further, please refer to Figure 1 and Figure 4 , the side of the first support plate 100 facing the second support plate 110 is provided with an air flow channel 2101 extending along the second direction A2, and the opposite sides of the membrane electrode 200 close to the first support plate 100 contact the first support plate 100 and the side of the bipolar plate 210 provided with the hydrogen flow channel 2102 respectively, to form a reaction unit.

[0048] The second support plate 110 is provided with a hydrogen gas flow channel 2102 (not shown in the figure) on the side facing the first support plate 100, and the opposite sides of the membrane electrode 200 close to the second support plate 110 are in contact with the second support plate 110 and the side of the bipolar plate 210 provided with the air flow channel 2101, respectively, to form a reaction unit.

[0049] In the present embodiment, the first support plate 100 and the second support plate 110 in the support assembly 10 not only provide preliminary support for the reaction assembly 20, but also integrate the gas flow channels, so that the membrane electrode 200 close to the support assembly 10, the bipolar plate 210 in contact with the membrane electrode 200, and the support assembly 10 together form a reaction unit.

[0050] Specifically, in one embodiment of the present embodiment, as shown in Figure 1 If the side of the bipolar plate 210 close to the first support plate 100 in the first direction A1 is the hydrogen gas flow channel 2102 and the other side is the air flow channel 2101, the first support plate 100 should be provided with the air flow channel 2101 on the side facing the second support plate 110, and the opposite sides of the membrane electrode 200 close to the first support plate 100 should be in contact with the first support plate 100 and the side of the bipolar plate 210 provided with the hydrogen gas flow channel 2102, respectively, to form a reaction unit. The second support plate 110 is provided in the same way as the first support plate 100, and will not be described in detail here.

[0051] In another embodiment of the present embodiment, if the side of the bipolar plate 210 close to the first support plate 100 in the first direction A1 is the air flow channel 2101 and the other side is the hydrogen gas flow channel 2102, the first support plate 100 should be provided with the hydrogen gas flow channel 2102 on the side facing the second support plate 110, and the opposite sides of the membrane electrode 200 close to the first support plate 100 should be in contact with the first support plate 100 and the side of the bipolar plate 210 provided with the air flow channel 2101, respectively, to form a reaction unit. The second support plate 110 is provided in the same way as the first support plate 100, and will not be described in detail here.

[0052] It is worth noting that the specific arrangement of the hydrogen gas flow channel 2102 and the air flow channel 2101 on the opposite sides of the bipolar plate 210 is not limited here, and the side of the first support plate 100 and the second support plate 110 facing the bipolar plate 210 should correspond to the gas flow channel provided on the side of the bipolar plate 210 facing the support assembly 10 to form a reaction unit.

[0053] Therefore, by directly integrating the gas flow channels on the first support plate 100 and the second support plate 110, the design of the reaction unit of the air-cooled fuel cell 1 is more compact, the space occupation is reduced, the power density of the air-cooled fuel cell 1 is improved, and the air-cooled fuel cell 1 can output higher electric energy under the same volume, and the production efficiency of the air-cooled fuel cell 1 is improved.

[0054] Further, please refer to Figure 1 , Figure 4 and Figure 5 , the number of air flow channels 2101 is multiple, and the multiple air flow channels 2101 are arranged at equal intervals on one side of the bipolar plate 210, and the multiple air flow channels 2101 are communicated with each other.

[0055] In the embodiment, the air flow channels 2101 penetrate the bipolar plate 210 along the second direction A2, and form air flow channel 2101 inlets and air flow channel 2101 outlets in contact with the membrane electrode 200. The number of air flow channels 2101 is multiple and the multiple air flow channels 2101 are arranged at equal intervals on one side of the bipolar plate 210, which helps to ensure that the air entering from the air flow channel 2101 inlets is uniformly distributed in the bipolar plate 210, thereby improving the reaction efficiency and cooling effect of the air-cooled fuel cell 1. At the same time, the multiple air flow channels 2101 are communicated with each other, which ensures the continuity and uniformity of the air flow in the reaction assembly 20.

[0056] The number of hydrogen flow channels 2102 is multiple, and the multiple hydrogen flow channels 2102 are arranged in a meandering manner on the other side of the bipolar plate 210, wherein the hydrogen flow channels 2102 are uniformly distributed on the other side of the bipolar plate 210, which ensures the continuity and uniformity of the hydrogen flow in the reaction assembly 20.

[0057] In the embodiment, the hydrogen flow channels 2102 are arranged in a meandering manner and uniformly distributed on the other side of the bipolar plate 210, which not only increases the contact area between the hydrogen in the hydrogen flow channel 2102 and the membrane electrode 200, but also ensures uniform supply of hydrogen on the other side of the bipolar plate 210, thereby improving the performance of the air-cooled fuel cell 1.

[0058] Further, please refer to Figure 3 , the air-cooled fuel cell 1 further comprises an electrode assembly 40, the electrode assembly 40 comprises a first electrode 400 and a second electrode 410 arranged opposite to each other in the first direction A1, wherein the first electrode 400 is in contact with the first support plate 100 and located on the side of the first support plate 100 away from the second support plate 110, and the second electrode 410 is in contact with the second support plate 110 and located on the side of the second support plate 110 away from the first support plate 100.

[0059] In the embodiment, the first electrode 400 and the second electrode 410 are closely attached to the first support plate 100 and the second support plate 110 respectively, so as to ensure that the electric energy generated by the reaction units is efficiently collected by the first electrode 400 and the second electrode 410, and the electrical connection with the outside is realized through the first electrode 400 and the second electrode 410.

[0060] It is worth mentioning that the first electrode 400 and the second electrode 410 are usually made of conductive materials (for example, copper), and the materials of the first electrode 400 and the second electrode 410 are not specifically limited herein, which can be selected according to actual conditions, on the premise of ensuring good electrical conductivity and mechanical strength.

[0061] Further, referring again to Figure 1 and Figure 3 , the air-cooled electric pile 1 further comprises a fixing assembly 50 and a fixing member 60.

[0062] The fixing assembly 50 comprises a first fixing plate 500 and a second fixing plate 510 which are oppositely arranged in the first direction A1, wherein the first fixing plate 500 is in contact with the first electrode 400 and located on the side of the first electrode 400 away from the second electrode 410, and the second fixing plate 510 is in contact with the second electrode 410 and located on the side of the second electrode 410 away from the first electrode 400.

[0063] The first fixing plate 500 and the second fixing plate 510 are provided with through holes (not shown in the figure) at corresponding positions, and the fixing member 60 fixes the first fixing plate 500 and the second fixing plate 510 through the through holes.

[0064] In the embodiment, the support assembly 10 and the reaction assembly 20 form a plurality of reaction units, and the electric energy generated thereby is collected by the electrode assembly 40, in addition to which the fixing assembly 50 and the fixing member 60 are used to fix the support assembly 10, the reaction assembly 20 and the electrode assembly 40, so as to ensure the structural stability of the entire air-cooled electric pile 1. Meanwhile, the first fixing member 60 and the second fixing member 60 also have a sealing function.

[0065] Specifically, the first fixing plate 500 is provided with a plurality of first through holes, and the second fixing plate 510 is provided with a plurality of second through holes corresponding to the first fixing plate 500. Exemplarily, the number of the first through holes and the second through holes is even, and the first through holes and the second through holes are evenly distributed on opposite sides of the first fixing plate 500 and the second fixing plate 510 respectively. The fixing member 60 connects the first fixing plate 500 and the second fixing plate 510 through the first through holes and the second through holes, so that the fixing assembly 50 and the fixing member 60 form a stable frame in which the reaction assembly 20, the support assembly 10 and the electrode assembly 40 are accommodated.

[0066] In addition, the first fixed plate 500 is in contact with the first electrode 400 and is located on the side of the first electrode 400 away from the second electrode 410, and the second fixed plate 510 is in contact with the second electrode 410 and is located on the side of the second electrode 410 away from the first electrode 400. This layout not only plays a fixing role for the support assembly 10, the reaction assembly 20 and the electrode assembly 30, but also helps to disperse the stress inside the air-cooled fuel cell 1.

[0067] The first electrode 400 protrudes relative to the first fixed plate 500, the second electrode 410 protrudes relative to the second fixed plate 510, one end of the fan 30 is fixed with the first fixed plate 500, and the other end of the fan 30 is fixed with the second fixed plate 510.

[0068] In this embodiment, the first electrode 400 and the second electrode 410 are used to collect the electric energy generated by the plurality of reaction units, and the first electrode 400 and the second electrode 410 protrude relative to the first fixed plate 500 and the second fixed plate 510, so as to facilitate the connection of the air-cooled fuel cell 1 to external equipment and realize the output of electric energy. At the same time, one end of the fan 30 is fixed with the first fixed plate 500, and the other end of the fan 30 is fixed with the second fixed plate 510, so as to ensure the structural stability of the fan 30 and help to realize the provision of uniform air flow and heat management.

[0069] Further, please refer to Figure 3 and Figure 5 The bipolar plate 210 further comprises an air inlet through hole 2103 and a drainage through hole 2104, the air inlet through hole 2103 is in communication with the inlet of the hydrogen flow channel 2102, and the drainage through hole 2104 is in communication with the outlet of the hydrogen flow channel 2102.

[0070] The fixed assembly 50 is provided with a hydrogen input interface 70 and a drainage output interface 80, wherein the hydrogen input interface 70 is in communication with the air inlet through hole 2103, and the drainage output interface 80 is in communication with the drainage through hole 2104.

[0071] In this embodiment, the air inlet through hole 2103 and the drainage through hole 2104 on the bipolar plate 210 are usually arranged near the top of the bipolar plate 210, so as to ensure that there is enough space for the hydrogen flow channel 2102 in the remaining area of the bipolar plate 210, increase the contact area between the hydrogen in the hydrogen flow channel 2102 and the membrane electrode 200, and improve the reaction efficiency. The air inlet through hole 2103 is used for inputting hydrogen into the hydrogen flow channel 2102, and the water generated after the reaction is discharged through the outlet of the hydrogen flow channel 2102, so as to prevent the accumulation of water from affecting the service life of the air-cooled fuel cell 1.

[0072] In this embodiment, a hydrogen input interface 70 and a drainage output interface 80 are provided on the fixed component 50. The hydrogen input interface 70 can be connected to a gas supply device, and the drainage output interface 80 can be connected to a water storage device. The gas supply device supplies hydrogen to the hydrogen flow channel 2102 through the hydrogen input interface 70. After the reaction, the hydrogen is discharged to the storage device through the drainage output interface 80, thus forming a complete hydrogen cycle and ensuring the stable performance of the air-cooled fuel cell stack 1.

[0073] Further, please see Figure 6 and Figure 7 , Figure 6 An air-cooled fuel cell stack 1 is provided in this embodiment. Figure 1 The diagram shows a cross-section at the BB cutting line. Figure 7 for Figure 6 A partial enlarged view of the dotted coil. The orthographic projection of the air channel 2101 of the bipolar plate 210 located on one side of the membrane electrode 200 onto the membrane electrode 200 overlaps with the orthographic projection of the hydrogen channel 2102 of the bipolar plate 210 located on the other side of the membrane electrode 200 onto the membrane electrode 200.

[0074] In this embodiment, by overlapping the orthographic projections of the air flow channel 2101 and the hydrogen flow channel 2102 located on both sides of the membrane electrode 200 onto the membrane electrode 200, not only is it helpful for the oxygen in the air flow channel 2101 and the hydrogen in the hydrogen flow channel 2102 to react fully, but it also makes full use of the area on both sides of the membrane electrode 200 within a limited space, thereby improving the reaction efficiency of the air-cooled stack 1.

[0075] Furthermore, please see again Figure 6 and Figure 7 On a cross section perpendicular to the extension direction of the bipolar plate 210, the cross section size of the air flow channel 2101 of the bipolar plate 210 is a first dimension, and the cross section size of the air flow channel 2101 of the bipolar plate 210 is a second dimension, with the first dimension being larger than the second dimension.

[0076] In this embodiment, the cross-sectional size of the gas flow channel determines the resistance and flow rate of the gas flow, which in turn affects the cooling efficiency of the air-cooled fuel cell stack 1 and the supply of reactant gases. In the air-cooled fuel cell stack 1, air is not only used as a reactant gas, but also a key factor in cooling the air-cooled fuel cell stack 1; a larger air flow rate helps to accelerate the removal of heat.

[0077] Furthermore, please see again Figure 6 and Figure 7 In a cross section perpendicular to the extension direction of the bipolar plate 210, the cross-sectional shapes of the air flow channel 2101 and the hydrogen flow channel 2102 include rectangles.

[0078] In the embodiment, the rectangular cross-sectional shape can provide more uniform gas flow efficiency and larger heat dissipation surface than other cross-sectional shapes (for example, circular) under the same cross-sectional area, effectively achieving heat dissipation of the air-cooled stack.

[0079] Based on the same inventive concept, another object of the present application is to provide a fuel cell, which comprises a gas supply device, a water storage device and any one of the aforementioned air-cooled stacks 1, wherein the gas supply device is connected to the hydrogen input interface 70 of the air-cooled stack 1, and the water storage device is connected to the water output interface 80 of the air-cooled stack 1. The gas supply device inputs hydrogen to the air-cooled stack 1 through the hydrogen input interface 70, and after the reaction of the reaction assembly 20 of the air-cooled stack 1, the electric energy is collected by the electrode assembly 40 and transmitted to external equipment, while the water produced after the reaction is discharged to the water storage device through the water output interface 80, effectively realizing the conversion of hydrogen to electric energy, and improving the production efficiency and space utilization of the fuel cell.

[0080] In summary, the air-cooled stack provided by the present application comprises a support assembly, a reaction assembly and a fan, the support assembly comprises a first support plate and a second support plate arranged oppositely, and a containing space is formed between the first support plate and the second support plate. The reaction assembly comprises a membrane electrode and a bipolar plate, the membrane electrode and the bipolar plate are arranged alternately and contained in the containing space, and the membrane electrode and the bipolar plates located on the opposite sides thereof form a reaction unit. The bipolar plate comprises an air flow channel and a hydrogen flow channel arranged on the opposite sides thereof, respectively, one side of the membrane electrode is in contact with the side of the bipolar plate provided with the air flow channel, and the other side of the membrane electrode is in contact with the side of the bipolar plate provided with the hydrogen flow channel. The fan is arranged at one end of the air flow channel and used for providing air for the air flow channel. In this way, the above-mentioned scheme can increase the flowability of air in the air flow channel through the design of the fan, achieve heat dissipation of the air-cooled stack, and improve the performance and service life of the air-cooled stack.

[0081] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An air-cooled electric pile, characterized by, The air-cooled electric pile comprises a supporting assembly, a reaction assembly and a fan; The supporting assembly comprises a first supporting plate and a second supporting plate oppositely arranged in a first direction, and a containing space is formed between the first supporting plate and the second supporting plate; The reaction assembly comprises a membrane electrode and a bipolar plate, the membrane electrode and the bipolar plate are alternately arranged in the first direction and contained in the containing space, and the membrane electrode and the bipolar plates on opposite sides thereof form a reaction unit; The bipolar plate comprises an air flow channel and a hydrogen flow channel arranged on opposite sides thereof respectively, the air flow channel extends along a second direction, the first direction is perpendicular to the second direction, one side of the membrane electrode is in contact with the side of the bipolar plate provided with the air flow channel, and the other side of the membrane electrode is in contact with the side of the bipolar plate provided with the hydrogen flow channel; The fan is arranged at one end of the air flow channel and used for providing air for the air flow channel.

2. The air-cooled stack of claim 1 wherein, The first supporting plate is provided with an air flow channel extending along the second direction on the side thereof facing the second supporting plate, and the opposite sides of the membrane electrode close to the first supporting plate are in contact with the first supporting plate and the side of the bipolar plate provided with the hydrogen flow channel respectively to form a reaction unit; The second supporting plate is provided with a hydrogen flow channel on the side thereof facing the first supporting plate, and the opposite sides of the membrane electrode close to the second supporting plate are in contact with the second supporting plate and the side of the bipolar plate provided with the air flow channel respectively to form a reaction unit.

3. The air-cooled stack of claim 1 wherein, The number of the air flow channels is multiple, the multiple air flow channels are arranged at equal intervals on one side of the bipolar plate, and the multiple air flow channels are in communication with each other; The number of the hydrogen flow channels is multiple, the multiple hydrogen flow channels are arranged in a meandering manner on the other side of the bipolar plate, and the hydrogen flow channels are uniformly distributed on the other side of the bipolar plate.

4. The air-cooled stack of any one of claims 1-3, wherein, The air-cooled electric pile further comprises an electrode assembly; The electrode assembly comprises a first electrode and a second electrode oppositely arranged in the first direction, wherein the first electrode is in contact with the first supporting plate and located on the side of the first supporting plate away from the second supporting plate, and the second electrode is in contact with the second supporting plate and located on the side of the second supporting plate away from the first supporting plate.

5. The air-cooled stack of claim 4 wherein, The air-cooled electric pile further comprises a fixing assembly and a fixing member; The fixing assembly comprises a first fixing plate and a second fixing plate oppositely arranged in the first direction, wherein the first fixing plate is in contact with the first electrode and located on the side of the first electrode away from the second electrode, and the second fixing plate is in contact with the second electrode and located on the side of the second electrode away from the first electrode; The first electrode protrudes relative to the first fixing plate, the second electrode protrudes relative to the second fixing plate, one end of the fan is fixed to the first fixing plate, and the other end of the fan is fixed to the second fixing plate; Corresponding positions of the first fixing plate and the second fixing plate are provided with through holes, and the fixing member fixes the first fixing plate and the second fixing plate through the through holes.

6. The air-cooled stack of claim 5 wherein, The bipolar plate further comprises a gas inlet through hole and a water outlet through hole, the gas inlet through hole is communicated with the inlet of the hydrogen flow channel, and the water outlet through hole is communicated with the outlet of the hydrogen flow channel; The fixed assembly is provided with a hydrogen input interface and a water outlet interface, the hydrogen input interface is communicated with the gas inlet through hole, and the water outlet interface is communicated with the water outlet through hole.

7. The air-cooled stack of claim 1 wherein, The air flow channel of the bipolar plate on one side of the membrane electrode has a projection on the membrane electrode which overlaps with the projection of the hydrogen flow channel of the bipolar plate on the other side of the membrane electrode.

8. The air-cooled stack of claim 1 wherein, In a cross section perpendicular to the extending direction of the bipolar plate, the cross section size of the air flow channel of the bipolar plate is a first size, and the cross section size of the hydrogen flow channel of the bipolar plate is a second size, the first size being larger than the second size.

9. The air-cooled stack of claim 1 wherein, In a cross section perpendicular to the extending direction of the bipolar plate, the cross section shape of the air flow channel and the hydrogen flow channel comprises a rectangle.

10. A fuel cell characterized by comprising: The fuel cell comprises a gas supply device, a water storage device and the air-cooled stack according to any one of claims 1-9, wherein the gas supply device is connected with the hydrogen input interface of the air-cooled stack, and the water storage device is connected with the water outlet interface of the air-cooled stack.

Images