CN119640296A - Solid oxide fuel electrolysis hydrogen production system and pile module thereof - Google Patents

Abstract

The application relates to a solid oxide fuel electrolysis hydrogen production system and a pile module thereof. The bottom of the electric pile is provided with a plurality of first channels, the surface of the air distribution platform, which is close to the electric pile, is provided with a plurality of second channels, the second channels are in one-to-one correspondence with the first channels, the electric pile is arranged on the air distribution platform, and the first channels are communicated with the corresponding second channels along the stacking direction of the electric pile. The compressing mechanism is arranged on the electric pile and is used for enabling the electric pile to be connected with the gas distribution platform in a sealing mode. The surface of the gas distribution platform, which is close to the electric pile, is provided with a plurality of second channels, namely the gas distribution platform directly distributes gas to the first channels of the electric pile through the second channels, the second channels are larger in size, the gas passage resistance in the gas distribution process can be effectively reduced, meanwhile, the medium can be uniformly distributed into the electric pile through the second channels, the uniform distribution of the medium in the electric pile is ensured, and the problem of poor electric pile performance caused by local overheating is avoided.

Description

Solid oxide fuel electrolysis hydrogen production system and pile module thereof

Technical Field

The application relates to the technical field of solid oxide fuel electrolysis hydrogen production systems, in particular to a solid oxide fuel electrolysis hydrogen production system and a pile module thereof.

Background

Common water electrolysis hydrogen production technologies include alkaline water electrolysis hydrogen production, proton exchange membrane electrolysis hydrogen production, solid Oxide Electrolysis Cell (SOEC) electrolysis hydrogen production and the like. The solid oxide electrolytic cell is one of common hydrogen production technologies by electrolyzing water, and when the solid oxide electrolytic cell is used for electrolysis, water vapor is introduced into the cathode inlet end of a galvanic pile, and the water vapor is gradually converted into hydrogen from the cathode inlet end under the action of electric field electrolysis. Wherein, the pile module is a basic component of the solid oxide fuel cell electrolytic hydrogen production system.

In the related art, the bottom of the electric pile is connected with an air inlet pipeline for introducing steam and air into the electric pile, on one hand, the air inlet through the pipeline is difficult to ensure uniform air distribution of each electric pile, and on the other hand, the air passage resistance of the air inlet through the pipeline is larger.

Disclosure of Invention

Based on the above, it is necessary to provide a solid oxide fuel electrolytic hydrogen production system and a pile module thereof, aiming at the problems of poor uniformity of gas distribution to the pile through a pipeline and large resistance of gas passage.

A galvanic pile module, the galvanic pile module comprising:

a pile, wherein the bottom of the pile is provided with a plurality of first channels;

the gas distribution platform is provided with a plurality of second channels close to the surface of the electric pile, the second channels are in one-to-one correspondence with the first channels, the electric pile is arranged on the gas distribution platform, and the first channels are communicated with the corresponding second channels along the stacking direction of the electric pile;

the compressing mechanism is arranged on the electric pile and is used for enabling the electric pile to be connected with the air distribution platform in a sealing mode.

In one embodiment, a gas distribution channel and a gas outlet channel are formed in the gas distribution platform, the second channel comprises a second gas inlet channel and a second gas outlet channel, a gas inlet and a gas outlet are formed in the gas distribution platform, the gas inlet is communicated with the second gas inlet channel through the gas distribution channel, and the second gas outlet channel is communicated with the gas outlet through the gas outlet channel.

In one embodiment, the number of the electric stacks is multiple, the gas distribution channels for distributing the same working medium are arranged in one-to-one correspondence with the electric stacks, and the gas distribution channels for distributing the same working medium are symmetrical about the center of the gas inlet.

In one embodiment, the second air inlet channel is located in the range of the air distribution channel along the stacking direction projection of the electric pile.

In one embodiment, a sealing gasket is arranged on the gas distribution platform, a first strip-shaped through hole is formed in the sealing gasket, the second channel is communicated with the first channel through the first strip-shaped through hole, and the sealing gasket is used for realizing sealing connection between the second channel and the first channel when the pressing mechanism presses the galvanic pile.

In one embodiment, the galvanic pile module comprises a first insulating piece, the sealing gasket comprises a first layer sealing gasket and a second layer sealing gasket, the first insulating piece and the second layer sealing gasket are sequentially stacked, the first insulating piece is located at one side, close to the air distribution platform, of the first layer sealing gasket, and second strip-shaped through holes corresponding to the second channels one by one are formed in the first insulating piece.

In one embodiment, the number of the sealing gaskets is multiple, and each second channel is respectively communicated with the first channel through a first strip-shaped through hole on the corresponding sealing gasket.

In one embodiment, the galvanic pile module comprises a base, and the gas distribution platform is arranged on the base;

The compressing mechanism comprises a first screw rod, a first lock nut, an elastic piece and a pressure component, wherein the pressure component is arranged at one end, far away from the gas distribution platform, of the galvanic pile, one end of the first screw rod is connected with the base, the other end of the first screw rod penetrates through the pressure component to be locked with the first lock nut, the elastic piece is sleeved outside the first screw rod, one end of the elastic piece is abutted to the first lock nut, and the other end of the elastic piece is abutted to the pressure component.

In one embodiment, the number of the galvanic piles is multiple, the pressure assembly comprises a pressing block and a force homogenizing block, the first screw penetrates through the center of the pressing block, the pressing block is provided with a plurality of end portions which are the same as the center in distance, and each end portion is in pressure connection with the galvanic pile through one force homogenizing block.

In one embodiment, the size of the shim stock gradually increases along the direction from the stack to the distribution platform.

In one embodiment, the pressure assembly further comprises a second screw and a second lock nut, wherein one end of the second screw is connected with the homogenizing block, and the other end of the second screw passes through the pressing block to be locked by the second lock nut.

In one embodiment, the stack module includes a second insulator disposed between the stack and the pressure assembly.

A solid oxide fuel electrolytic hydrogen production system comprises a plurality of pile modules.

According to the solid oxide fuel electrolysis hydrogen production system and the electric pile module thereof, the plurality of second channels are formed on the surface, close to the electric pile, of the gas distribution platform, namely the gas distribution platform directly distributes gas to the first channels of the electric pile through the second channels, the size of the second channels is larger, the gas channel resistance in the gas distribution process can be effectively reduced, meanwhile, media can be uniformly distributed into the electric pile through the second channels, uniform distribution of the media in the electric pile is ensured, and the problem of poor electric pile performance caused by local overheating is avoided. The compressing mechanism is arranged on the electric pile and used for ensuring the electric pile to be connected with the air distribution platform in a sealing way so as to prevent air leakage.

Drawings

FIG. 1 is a schematic diagram of the internal structure of a pile module according to an embodiment.

Fig. 2 is a schematic structural diagram of a gas distribution platform according to an embodiment.

FIG. 3 is a schematic view of the structure of the interior of the gas distribution platform according to an embodiment.

Fig. 4 is a schematic diagram of a structure of the stack module after removing the stacks in an embodiment.

Fig. 5 is a schematic structural view of a sealing gasket disposed on a first insulating member according to an embodiment.

FIG. 6 is a schematic diagram of the internal structure of a pile module according to an embodiment.

Fig. 7 is a schematic structural diagram of a pile module according to an embodiment.

Reference numerals 100, pile, 200, distribution platform, 210, second air inlet channel, 211, second steam inlet channel, 212, second air inlet channel, 220, second air outlet channel, 221, second steam outlet channel, 222, second air outlet channel, 230, distribution channel, 231, steam distribution channel, 232, air distribution channel, 240, air outlet channel, 241, steam outlet channel, 242, air outlet channel, 250, air inlet, 251, air inlet, 252, steam inlet, 260, air outlet, 261, air outlet, 262, steam outlet, 270, sealing gasket, 271, first strip-shaped through hole, 280, first positioning groove, 300, pressing mechanism, 310, first screw, 320, first locking nut, 330, elastic element, 340, pressure component, 341, pressing block, 342, even force block, 343, second screw, 344, second locking nut, 350, sleeve, 410, air inlet pipe, 411, water inlet pipe, 412, air inlet pipe, 430, air outlet pipe, 431, air outlet pipe, 432, air outlet pipe, 520, air outlet pipe, 510, first strip-shaped air outlet pipe, 510, second insulation element, 610, second strip-shaped through hole, insulation element, 630, insulation element, heat-up element, and insulating element.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, they may be fixedly connected, detachably connected or integrally formed, mechanically connected, electrically connected, directly connected or indirectly connected through an intermediate medium, and communicated between two elements or the interaction relationship between two elements unless clearly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1-7, a stack module according to an embodiment of the present application includes a stack 100, a gas distribution platform 200, and a pressing mechanism 300. The stack 100 has a plurality of first channels at the bottom. The surface of the gas distribution platform 200, which is close to the electric pile 100, is provided with a plurality of second channels, the second channels are in one-to-one correspondence with the first channels, the electric pile 100 is arranged on the gas distribution platform 200, and the first channels are communicated with the corresponding second channels along the stacking direction of the electric pile 100. The pressing mechanism 300 is disposed on the electric pile 100, and the pressing mechanism 300 is used for enabling the electric pile 100 to be in sealing connection with the gas distribution platform 200.

In this embodiment, the surface of the gas distribution platform 200, which is close to the electric pile 100, is provided with a plurality of second channels, that is, the gas distribution platform 200 directly distributes gas to the electric pile 100 through the second channels, and the second channels have larger dimensions compared with the pipelines, so that the air passage resistance in the gas distribution process can be effectively reduced, and meanwhile, the medium can be uniformly distributed into the electric pile 100 through the second channels, so that the uniform distribution of the medium in the electric pile 100 is ensured, and the problem of poor performance of the electric pile 100 caused by local overheating is avoided. The pressing mechanism 300 is disposed on the electric pile 100, and is used for ensuring the electric pile 100 to be connected with the air distribution platform 200 in a sealing manner, so as to prevent air leakage.

In addition, the application adopts the air distribution platform 200 to directly distribute air, and the air distribution platform 200 is arranged on the base 610, which is beneficial to ensuring the flatness of the base 610, so that the structure of the electric pile module is more stable and is not easy to deform.

Specifically, the first channel coincides with the second channel or is located within the second channel when projected along the stacking direction of the stack 100, so that the medium can sufficiently flow into the stack 100.

In some embodiments, referring to fig. 2 and 3, a gas distribution channel 230 and a gas outlet channel 240 are formed in the gas distribution platform 200, the second channel includes a second gas inlet channel 210 and a second gas outlet channel 220, a gas inlet 250 and a gas outlet 260 are formed on the gas distribution platform 200, the gas inlet 250 is communicated with the second gas inlet channel 210 through the gas distribution channel 230, and the second gas outlet channel 220 is communicated with the gas outlet 260 through the gas outlet channel 240.

In this embodiment, the first channel includes a first inlet channel and a first outlet channel. After the working medium entering the gas distribution channel 230 from the gas inlet 250 fills the gas distribution channel 230, the working medium rises from the gas distribution channel 230 to the second gas inlet channel 210, then sequentially passes through the second gas inlet channel 210 and the first gas inlet channel to enter the electric pile 100 for reaction, and the reacted mixed gas sequentially passes through the first gas outlet channel, the second gas outlet channel 220, the gas outlet channel 240 and the gas outlet 260 to flow into the gas outlet pipe 430. By the arrangement of the air distribution channel 230, the flow speed of the working medium can be reduced, and the working medium can uniformly flow into the second air inlet channel 210, so that the air distribution uniformity is improved.

In some embodiments, the number of stacks 100 is plural, and the gas distribution channels 230 for distributing the same working medium are disposed in a one-to-one correspondence with the stacks 100, and the plurality of gas distribution channels 230 for distributing the same working medium are centrally symmetrical with respect to the gas inlet 250.

Specifically, the working medium includes water vapor and air, the air inlet 250 is connected with the air inlet pipe 410, the air outlet 260 is connected with the air outlet pipe 430, wherein two air inlets 250 are respectively used for conveying the water vapor and the air into the air distribution platform 200, the corresponding air inlet pipe 410 includes a water vapor air inlet pipe 411 and an air inlet pipe 412, and the water vapor air inlet pipe 411 and the air inlet pipe 412 are respectively wound with a heater 630 for controlling the temperature and heating the water vapor and the air in the pipeline. The air outlet pipe 430 also comprises a vapor air outlet pipe 431 and an air outlet pipe 432, namely the total number of the pipelines is 4, so that the number of the pipelines is greatly reduced, and the influences of pipeline heat preservation and heat radiation are effectively reduced.

Still further, the gas distribution platform 200 has a central axis, on which an air inlet 251, a steam outlet 262, an air outlet 261 and a steam inlet 252 are sequentially arranged, and the two stacks 100 are respectively located at two sides of the central axis, and the steam or air entering from the air inlet 250 can flow to two sides of the central axis at the same time so as to fill the second air inlet channels 210 located at the bottoms of the two stacks 100 at the same time.

Specifically, the air distribution platform 200 is provided with two air distribution channels 232 which are mutually communicated and symmetrical about the central axis, two water vapor air outlet channels 241 which are mutually communicated and symmetrical about the central axis, two air outlet channels 242 which are mutually communicated and symmetrical about the central axis, and two water vapor air distribution channels 231 which are mutually communicated and symmetrical about the central axis.

The air distribution channel 232, the steam outlet channel 241 and the steam distribution channel 231 are all L-shaped structures, and the air outlet channel 242 is a T-shaped structure.

Referring to fig. 2, the second inlet passage 210 includes an air second inlet passage 212 and a water vapor second inlet passage 211, and the second outlet passage 220 includes an air second outlet passage 222 and a water vapor second outlet passage 221. Two first positioning grooves 280 are formed in the surface of the gas distribution platform 200, and the two first positioning grooves 280 are arranged in one-to-one correspondence with the two electric stacks 100. An air second inlet passage 212, a water vapor second inlet passage 211, a water vapor second outlet passage 221, and an air second outlet passage 222 are sequentially arranged in each of the first positioning grooves 280 in a direction from one of the stacks 100 to the other stack 100.

In some embodiments, the second air inlet channel 210 is located within the range of the air distribution channel 230 along the stacking direction of the stack 100, the area of the air distribution channel 230 is larger than the area of the second air inlet channel 210, and by adjusting the ratio of the area of the air distribution channel 230 to the area of the second air inlet channel 210, the flow rate of the working medium can be changed, so that the working medium fills the whole second air inlet channel 210.

In some embodiments, referring to fig. 4 and 5, a sealing gasket 270 is disposed on the gas distribution platform 200, a first strip-shaped through hole 271 is formed on the sealing gasket 270, the second channel is communicated with the first channel through the first strip-shaped through hole 271, and when the pressing mechanism 300 presses the electric pile 100, the sealing gasket 270 is used for realizing sealing connection between the second channel and the first channel, so as to prevent gas leakage between the gas distribution platform 200 and the electric pile 100.

In some embodiments, the galvanic pile module includes a first insulating member 510, the sealing gasket 270 includes a first layer of sealing gasket and a second layer of sealing gasket, the first insulating member 510 and the second layer of sealing gasket are sequentially stacked, the first insulating member 510 is located at one side of the first layer of sealing gasket, which is close to the gas distribution platform 200, and the first insulating member 510 is provided with second strip-shaped through holes 511 corresponding to the second channels one by one.

In the present embodiment, the first insulating member 510 is used for insulating the gas distribution platform 200 from the electric pile 100, the first sealing gasket 270 is disposed between the first insulating member 510 and the gas distribution platform 200 for preventing gas leakage between the first insulating member 510 and the gas distribution platform 200, and the second sealing gasket 270 is disposed between the first insulating member 510 and the electric pile 100 for preventing gas leakage between the first insulating member 510 and the electric pile 100.

Further, the number of the sealing gaskets 270 is plural, and each second channel is respectively communicated with the first channel through the first bar-shaped through hole 271 on the corresponding sealing gasket 270.

In this embodiment, the number of the sealing gaskets 270 is the same as that of the second channels, and each second channel is provided with one sealing gasket 270, which is favorable to reduce the area of the sealing gasket 270, and when the pressing mechanism 300 presses the electricity against the gas distribution platform 200, the gas leakage between the gas distribution platform 200 and the electric pile 100 can be further prevented, and the sealing performance is improved.

In some embodiments, referring to fig. 1, the electric pile module comprises a base 610, the gas distribution platform 200 is arranged on the base 610, the pressing mechanism 300 comprises a first screw 310, a first locking nut 320, an elastic piece 330 and a pressure assembly 340, the pressure assembly 340 is arranged on one end of the electric pile 100 far away from the gas distribution platform 200, one end of the first screw 310 is connected with the base 610, the other end passes through the pressure assembly 340 to be locked with the first locking nut 320, the elastic piece 330 is sleeved outside the first screw 310, one end of the elastic piece 330 is abutted with the first locking nut 320, and the other end is abutted with the pressure assembly 340.

Specifically, the pressing mechanism 300 further includes a sleeve 350, the sleeve 350 is sleeved on the first screw 310 and located between the elastic member 330 and the pressure assembly 340, and the sleeve 350 is used for transmitting force.

In the present embodiment, the pressure applied to the stack 100 can be adjusted by the first lock nut 320 so that the pressurizing force can be calibrated, and periodic verification of the pressurizing force is facilitated. The elastic member 330 may be a spring or an elastic block, and the pressure in the electric pile 100 is convenient to be adaptively adjusted by the arrangement of the elastic member 330 due to the large internal pressure change of the electric pile 100 during the reaction process. In addition, the pressing mechanism 300 can also realize fixation and pressurization setting of the electric stacks 100 of different models.

The first positioning groove 280 is formed in the air distribution platform 200, the first insulating piece 510 is arranged in the first positioning groove 280, the first positioning groove 280 is used for limiting two adjacent surfaces of the first insulating piece 510, and the other two surfaces are not limited and are used for reserving a space for thermal expansion of the first insulating piece 510. The first insulating member 510 is provided with a second positioning groove, and the second positioning groove is also used for limiting only two adjacent surfaces of the electric pile 100, and the other two surfaces are not limited, so that a space for thermal expansion of the electric pile 100 is reserved. The pressing mechanism 300 is used for fixing the electric pile 100, eliminating the damage of the transverse shearing force to the electric pile 100 and fully protecting the electric pile 100.

In some embodiments, the number of stacks 100 is plural, the pressure assembly 340 includes a pressing block 341 and a force homogenizing block 342, the first screw 310 passes through the center of the pressing block 341, the pressing block 341 has plural ends at the same distance from the center, and each end is crimped with the stacks 100 by one force homogenizing block 342, respectively.

Taking the number of the electric stacks 100 as two as an example, the pressing block 341 is a cross beam, the first screw 310 passes through the center of the cross beam, and two ends of the cross beam are respectively pressed on the electric stacks 100 through the uniform force blocks 342, so that the pressure on each electric stack 100 is the same.

Of course, in other embodiments, the stacks 100 may be three, four, or five, and when the stacks 100 are three, the three stacks 100 are respectively located on three vertices of the regular triangle, and the first screw 310 passes through the center of the regular triangle.

Further, the size of the shim packs 342 increases gradually in the direction from the stack 100 to the distribution platform 200. The force homogenizing block 342 is contacted with the pressing block 341 through the convex points, so that the pressure of the pressing mechanism 300 is gradually diffused to the whole electric pile 100 from point to surface, and the uniformity of the pressure at each position of the electric pile 100 is ensured.

Specifically, the pressure assembly 340 further includes a second screw 343 and a second lock nut 344, one end of the second screw 343 is connected to the homogenizing block 342, and the other end passes through the pressing block 341 to be locked by the second lock nut 344.

In this embodiment, the pressure balance on each stack 100 is ensured by adjusting the second lock nut 344 for bringing the power block 342 into contact with the stack 100.

In some embodiments, referring to fig. 7, the galvanic pile module includes a housing 620, and an end of the first screw 310 remote from the base 610 extends outside the housing 620, and the elastic member 330 is disposed outside the housing 620, so as to prevent the elastic member 330 from being disabled due to an excessive temperature inside the housing 620. The casing 620 is sleeved on the base 610, and the base 610 and the casing 620 are both made of thermal insulation materials.

In some embodiments, the stack module includes a second insulator 520, the second insulator 520 being disposed between the stack 100 and the pressure assembly 340, the second insulator 520 being configured to ensure insulation between the stack 100 and the pressure assembly 340. Specifically, the second insulator 520 is clamped to the bottom of the shim 342.

In some embodiments, the stacks 100 are arranged in a vertical direction, the distance between two adjacent stacks 100 is controllable, and the stacks 100 are more convenient to install and detach.

The embodiment of the application also provides a solid oxide fuel electrolytic hydrogen production system, which comprises the galvanic pile module. The application has the functions of pressurization, fixation, sealing, insulation, gas distribution and repeated disassembly and assembly, has small occupied space, greatly saves arrangement space and is beneficial to the miniaturization design of a high-power solid oxide fuel electrolysis hydrogen production system.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (13)

1. A galvanic pile module, characterized in that the galvanic pile module comprises:

a pile, wherein the bottom of the pile is provided with a plurality of first channels;

the gas distribution platform is provided with a plurality of second channels close to the surface of the electric pile, the second channels are in one-to-one correspondence with the first channels, the electric pile is arranged on the gas distribution platform, and the first channels are communicated with the corresponding second channels along the stacking direction of the electric pile;

the compressing mechanism is arranged on the electric pile and is used for enabling the electric pile to be connected with the air distribution platform in a sealing mode.

2. The galvanic pile module according to claim 1, wherein a gas distribution channel and a gas outlet channel are formed in the gas distribution platform, the second channel comprises a second gas inlet channel and a second gas outlet channel, a gas inlet and a gas outlet are formed in the gas distribution platform, the gas inlet is communicated with the second gas inlet channel through the gas distribution channel, and the second gas outlet channel is communicated with the gas outlet through the gas outlet channel.

3. The electric pile module according to claim 2, wherein the number of electric piles is a plurality, the gas distribution channels for distributing the same working medium are arranged in one-to-one correspondence with the electric piles, and the plurality of gas distribution channels for distributing the same working medium are symmetrical about the center of the gas inlet.

4. The stack module of claim 2, wherein the second air intake channel is located within the distribution channel as projected in the stacking direction of the stack.

5. The galvanic pile module according to claim 1, wherein a sealing gasket is arranged on the gas distribution platform, a first strip-shaped through hole is formed in the sealing gasket, the second channel is communicated with the first channel through the first strip-shaped through hole, and the sealing gasket is used for realizing sealing connection between the second channel and the first channel when the pressing mechanism presses the galvanic pile.

6. The electric pile module of claim 5, wherein the electric pile module comprises a first insulating piece, the sealing gasket comprises a first layer sealing gasket and a second layer sealing gasket, the first insulating piece and the second layer sealing gasket are sequentially stacked, the first insulating piece is located on one side, close to the air distribution platform, of the first layer sealing gasket, and second strip-shaped through holes corresponding to the second channels one by one are formed in the first insulating piece.

7. The stack module of claim 5, wherein the number of sealing gaskets is plural, and each of the second channels is respectively communicated with the first channel through a first bar-shaped through hole on the corresponding sealing gasket.

8. The electric pile module according to claim 1, characterized in that it comprises a base on which the gas distribution platform is arranged;

The compressing mechanism comprises a first screw rod, a first lock nut, an elastic piece and a pressure component, wherein the pressure component is arranged at one end, far away from the gas distribution platform, of the galvanic pile, one end of the first screw rod is connected with the base, the other end of the first screw rod penetrates through the pressure component to be locked with the first lock nut, the elastic piece is sleeved outside the first screw rod, one end of the elastic piece is abutted to the first lock nut, and the other end of the elastic piece is abutted to the pressure component.

9. The stack module of claim 8, wherein the number of stacks is plural, the pressure assembly includes a press block and a homogenizing block, the first screw passes through a center of the press block, the press block has plural ends at the same distance from the center, and each end is crimped with the stacks by one homogenizing block.

10. The stack module of claim 9, wherein the size of the shim is progressively larger in a direction from the stack to the distribution platform.

11. The electric pile module according to claim 9, characterized in that the pressure assembly further comprises a second screw and a second lock nut, one end of the second screw being connected to the refining block, the other end passing through the press block to be locked by the second lock nut.

12. The cell stack module of claim 8, comprising a second insulator disposed between the cell stack and the pressure assembly.

13. A solid oxide fuel electrolysis hydrogen production system comprising a plurality of galvanic pile modules according to any one of claims 1 to 12.