Device for producing hydrogen by electrolyzing water through proton membrane with parallel-series structure

Abstract

The invention discloses a parallel-series structure proton membrane water electrolysis hydrogen production device, and belongs to the field of polymer ion membrane water electrolysis. The parallel-series structure proton membrane water electrolysis hydrogen production device comprises two or more groups of metal polar plates which are arranged side by side in a parallel mode, each group of metal polar plates is provided with at least two electrolysis units in a longitudinal or transverse series mode, and the electrolysis units on the metal polar plates are communicated. A layer of insulating support plate is arranged between the upper and lower metal polar plates, and all the metal polar plates on the same layer are flatly laid. And bolts are arranged around all the electrolysis chambers for pressing. The metal polar plates, the insulating supporting plates, the electrolysis units and the like are stacked in multiple layers to form the electrolysis device. According to the parallel-series structure proton membrane water electrolysis hydrogen production device, the insulation supporting plate serves as a framework, the multiple electrolysis chambers are formed in the same layer in the mode that the multiple electrolysis chambers are transversely and longitudinally arranged on the metal polar plates and the metal polar plates are transversely and longitudinally spliced, and therefore the effective working area of a single-layer electrolysis assembly is increased, and then the power of an electrolytic bath is improved.

Description

Technical Field

[0001] The invention relates to the technical field of polymer ion membrane water electrolysis, and in particular to a parallel-series structure proton membrane water electrolysis hydrogen production device. Background Art

[0002] The application scale of proton membrane water electrolysis for hydrogen production is getting larger and larger, and the power demand for electrolyzers is getting larger and larger. The components of the electrolyzer are made of thin materials, such as the thickness of the proton membrane, which is usually 0.185mm, and the thickness of the electrolytic plate is small; the electrolyzer is composed of hundreds of electrolytic units stacked together. After assembly, the contact resistance between the entire proton membrane surface and the electrolytic plate is required to be small and uniform, and the control of the clamping force and size is very critical. The existing clamping method is to use the upper and lower pressing plates to cooperate with the screws arranged around the electrolytic chamber to achieve the clamping of the electrolytic unit. The pressure of the gas outlet during the process of water electrolysis for hydrogen production is as high as 3MPa. In order to better control the thickness tolerance of the electrolytic unit during the hydrogen production process, the length and width of the commonly used electrolytic plate will be controlled within a certain range, the area of ​​the electrolytic chamber cannot be large, and the width of some components also has certain limits, that is, the horizontal size of the existing electrolytic cell is limited, and the power of the electrolytic cell is also limited.

[0003] Therefore, the prior art needs to be improved. Summary of the invention

[0004] In view of this, the present invention provides a proton membrane water electrolysis hydrogen production device with a parallel-series structure, which is used to solve the problem in the prior art that the power of the electrolyzer is limited due to the need to control the horizontal size.

[0005] In order to achieve one or part or all of the above-mentioned purposes or other purposes, the present invention proposes a parallel-series structure proton membrane water electrolysis hydrogen production device, including a plurality of electrolysis components stacked together in sequence, the electrolysis components including an insulating support plate and two or more groups of metal plates arranged side by side, each group of the metal plates is provided with at least two electrolysis chambers, and two adjacent electrolysis chambers are connected, the metal plates include a stacked negative metal plate and a positive metal plate, and the insulating support plate is arranged between the negative metal plate and the positive metal plate.

[0006] Preferably, the electrolysis assembly also includes a plurality of electrolysis units, each of which is installed in a corresponding electrolysis chamber; the insulating support plate is a flat plate, and the thickness of the insulating support plate is equal to the thickness of the electrolysis unit under the compression of the negative metal plate and the positive metal plate.

[0007] Preferably, at least one water inlet hole, at least one water outlet hole and at least one hydrogen outlet hole are provided on the negative metal pole plate, the insulating support plate and the positive metal pole plate, and at least one positive flow channel groove and at least one negative flow channel groove are respectively provided on one side of the positive metal pole plate and the negative metal pole plate for bonding with the insulating support plate. At least two first drainage water holes and at least one second drainage water hole are provided on the other side of the positive metal pole plate, and at least one first drainage air hole and at least one second drainage air hole are provided on the other side of the negative metal pole plate. Each of the water inlet holes and each of the water outlet holes are connected to a corresponding positive flow channel groove through at least one first drainage water hole, and the second drainage water hole is connected to two positive flow channel grooves located on the same positive metal pole plate. Each of the hydrogen outlet holes is connected to a corresponding negative flow channel groove through the first drainage air hole, and the second drainage air hole is connected to two negative flow channel grooves located on the same negative metal pole plate.

[0008] Preferably, a first sealing ring is provided in the water inlet hole, and a third sealing ring is provided in the hydrogen outlet hole, and the first sealing ring and the third sealing ring are both sealed and pressed between the lower side of the negative metal pole plate and the upper side of the positive metal pole plate; a first sealing groove and a second sealing groove are provided between the negative metal pole plate and the positive metal pole plate that are fitted to each other, and the first sealing groove and the second sealing groove are both annular, the water inlet hole passes through the inner circle of the first sealing groove, and the hydrogen outlet hole passes through the inner circle of the second sealing groove, the first sealing groove is provided with a second sealing ring, and the second sealing groove is provided with a fourth sealing ring.

[0009] Preferably, the gap between two adjacent groups of metal plates is a narrow gap, and the narrow gap is filled with conductive glue.

[0010] Preferably, the parallel-series structure proton membrane water electrolysis hydrogen production device also includes an upper pressure plate, an upper insulating plate, a lower insulating plate and a lower pressure plate arranged in sequence, and the plurality of stacked electrolysis components are arranged between the upper insulating plate and the lower insulating plate.

[0011] Preferably, the electrolysis unit comprises an upper gas diffusion layer, a lower gas diffusion layer, a proton membrane, an upper membrane sealing ring and a lower membrane sealing ring, the upper membrane sealing ring and the lower membrane sealing ring are respectively located on the upper and lower sides of the proton membrane, the upper gas diffusion layer, the proton membrane and the lower gas diffusion layer are sequentially stacked and installed in the electrolysis chamber, and the proton membrane is clamped under the pressure of the negative metal plate and the positive metal plate, the upper gas diffusion layer is located in the inner ring of the upper membrane sealing ring, and the lower gas diffusion layer is located in the inner ring of the lower membrane sealing ring.

[0012] Preferably, the parallel-series structure proton membrane water electrolysis hydrogen production device includes a plurality of first locking screws and a plurality of locking nuts. The first locking screws pass through the upper pressure plate, the upper insulating plate, the negative metal plate, the insulating support plate, the positive metal plate, the lower insulating plate and the lower pressure plate and are locked with the locking nuts. The plurality of first locking screws are distributed around the electrolysis chamber of the electrolysis assembly.

[0013] Preferably, an insulating layer is provided on the outer wall of the first locking screw.

[0014] Implementing the embodiments of the present invention will have the following beneficial effects:

[0015] 1. An insulating support plate is used as the middle frame of the electrolytic unit. The thickness is relatively thicker than the electrolytic plate. Since the insulating support plate has no requirements for conductivity, a high-strength material can be used in material selection. It can withstand high pressure and has no great restrictions on horizontal dimensions. The insulating support plate is used as a skeleton, and a single-layer electrolytic assembly is formed by splicing multiple electrolytic plates above and below it. Multiple electrolytic chambers are formed on the same layer, thereby increasing the effective working area of ​​the single-layer electrolytic assembly and thereby achieving an increase in the power of the electrolytic cell.

[0016] 2. In the preferred solution, screws are added between multiple electrolysis chambers to make the pressure more uniform, which is beneficial to the control of the size changes of various components of the electrolysis assembly during the hydrogen production process and ensure the hydrogen production effect;

[0017] 3. In the preferred embodiment, a plurality of positive (negative) flow channel grooves are provided on a single positive (negative) electrode electrolytic plate, and a mounting hole is provided between two adjacent (negative) flow channel grooves, and a screw is used to make the pressure more uniform and the dimensional change control effect of the hydrogen production process is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] in:

[0020] Figure 1 It is a schematic diagram of a three-dimensional explosion structure of an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of a top view of the structure of an embodiment of the present invention;

[0022] Figure 3 for Figure 2Schematic diagram of the cross-sectional structure along section AA;

[0023] Figure 4 for Figure 3 Enlarged view at center C;

[0024] Figure 5 for Figure 3 Magnified view at D in the middle;

[0025] Figure 6 for Figure 3 Enlarged view at E in the middle;

[0026] Figure 7 for Figure 2 Schematic diagram of the cross-sectional structure along section BB;

[0027] Figure 8 for Figure 7 Enlarged view at F in the middle;

[0028] Fig. 9 for Figure 7 Magnified view at H in the middle;

[0029] Fig.10 FIG. 1 is a bottom view of a positive metal plate in one embodiment of the present invention.

[0030] The reference numerals are as follows: 100, electrolytic assembly; 1001, electrolytic chamber; 200, upper pressure plate; 2001, third mounting hole; 2002, fifth mounting hole; 2003, ninth mounting hole; 300, lower pressure plate; 400, water inlet hole; 500, intermediate water channel sealing ring; 600, first sealing ring; 700, second sealing ring; 800, hydrogen outlet hole; 900, intermediate air channel sealing ring; 1000, third sealing ring; 1100, fourth sealing ring; 1200, upper insulating plate; 1300, lower insulating plate; 1, negative metal plate; 11, negative flow channel groove; 12, second mounting hole; 13, first avoidance groove; 14, sixth mounting hole; 15, first water inlet interface; 16, first air outlet interface; 17, first drainage air hole; 18, second drainage air hole Hole; 181, intermediate airway sealing groove; 19, second drainage groove; 2, positive metal plate; 21, positive flow channel groove; 22, second avoidance groove; 23, seventh mounting hole; 24, second water inlet interface; 241, first sealing groove; 25, first drainage water hole; 26, second drainage water hole; 261, intermediate waterway sealing groove; 27, first drainage groove; 28, second gas outlet interface; 281, second sealing groove; 3, insulating support plate; 31, electrolysis through hole; 32, first mounting hole; 33, fourth mounting hole; 34, eighth mounting hole; 35, third water inlet interface; 36, third gas outlet interface; 4, electrolysis unit; 41, upper gas diffusion layer; 42, lower gas diffusion layer; 43, proton membrane; 44, upper membrane sealing ring; 45, lower membrane sealing ring; 5, water outlet hole. DETAILED DESCRIPTION

[0031] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0033] It is understood that the singular forms "a", "an" and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0034] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to another element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes. In the present invention, the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, the above-mentioned part of the terms may be used to express other meanings in addition to being used to express orientation or position relationship, for example, the term "upper" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to the specific circumstances.

[0035] In addition, the terms "disposed", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Reference Figures 1 to 10 A parallel-series structure proton membrane water electrolysis hydrogen production device, comprising a plurality of electrolytic assemblies 100 stacked together in sequence, the electrolytic assemblies 100 comprising an insulating support plate 3 and two or more groups of metal plates arranged side by side, each group of the metal plates being provided with at least two electrolytic chambers 1001, two adjacent electrolytic chambers 1001 being connected, the metal plates comprising a stacked negative metal plate 1 and a positive metal plate 2, the insulating support plate 3 being arranged between the negative metal plate 1 and the positive metal plate 2. The metal plate is composed of a negative metal plate 1 and a positive metal plate 2 combined together.

[0037] Specifically, the electrolytic assembly 100 includes at least two negative metal plates 1, at least two positive metal plates 2, and an insulating support plate 3; at least two of the negative metal plates 1 are arranged in parallel in the horizontal direction and installed on the upper side of the insulating support plate 3, and at least two of the positive metal plates 2 are arranged in parallel and installed on the lower side of the insulating support plate 3; each of the negative metal plates 1 is provided with at least one negative flow channel 11 on the lower side, and each of the positive metal plates 2 is provided with at least one positive flow channel 21 on the upper side, and the insulating support plate 3 is provided with a A plurality of electrolytic through holes 31, the negative electrode flow channel 11, the electrolytic through hole 31, and the positive electrode flow channel 21 are grouped one by one, and each group of the negative electrode flow channel 11, the electrolytic through hole 31, and the positive electrode flow channel 21, the negative electrode metal plate 1, the insulating support plate 3, and the positive electrode metal plate 2 are sequentially attached to form an electrolytic chamber 1001, wherein the negative electrode flow channel 11 constitutes the top of the electrolytic chamber 1001, the positive electrode flow channel 21 constitutes the bottom of the electrolytic chamber 1001, and the side wall of the electrolytic through hole 31 constitutes the side wall of the electrolytic chamber 1001. As an example, Figure 1 and Figure 7 As shown, in this embodiment, the number of the negative metal pole plates 1 and the number of the positive metal pole plates 2 in each of the electrolytic components 100 are both two; the two negative metal pole plates 1 are arranged side by side along the width direction thereof, and similarly, the two positive metal pole plates 2 are arranged side by side along the width direction thereof. Compared with the existing electrolysis device: each electrolysis layer has only one positive metal plate 2 and one negative metal plate 1, and due to the limitation of pressure bearing capacity, the area of ​​the single positive metal plate 2 and the negative metal plate 1 is limited, so that the working efficiency of the electrolysis device is limited; the parallel-series structure proton membrane water electrolysis hydrogen production device provided by the specific embodiment of the present invention uses the insulating support plate 3 as the middle frame of the electrolysis component 100, and the thickness is relatively thick. In addition, since the insulating support plate 3 has no requirements on conductivity and the like, a material with higher strength can be used in material selection, and it can withstand higher pressure, and there is not much restriction on the horizontal size. It is used as the skeleton, and a single-layer electrolysis component is formed by splicing multiple electrolysis plates above and below it, and multiple electrolysis chambers 1001 are formed on the same layer, thereby increasing the effective working area of ​​the single-layer electrolysis component 100, and then achieving an increase in the power of the electrolytic cell.

[0038] In some optional implementations, the gap between the two adjacent groups of metal plates is a narrow gap, and the narrow gap is filled with conductive glue. By applying the conductive glue in the gap, the power supply requirement of the metal plates can be guaranteed.

[0039] In some optional implementations, the electrolysis assembly 100 also includes a plurality of electrolysis units 4, each of which is installed in a corresponding electrolysis chamber 1001; the insulating support plate is a flat plate, and the thickness of the insulating support plate is equal to the thickness of the electrolysis unit 4 under the compression of the negative metal plate 1 and the positive metal plate 2.

[0040] In some optional embodiments, the insulating support plate 3 is provided with a water vapor port and a screw hole, which can cooperate with the corresponding through holes on the negative metal plate 1 and the positive metal plate 2, and a space corresponding to the electrolysis chamber is arranged in the middle of the insulating support plate 3; the insulating support plate 3 is made of a material that is resistant to high temperature, weak acid and weak alkali, and has high strength pressure resistance, small deformation and controllable performance.

[0041] In some optional implementations, such as Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the parallel-series structure proton membrane water electrolysis hydrogen production device also includes an upper pressing plate 200, an upper insulating plate 1200, a lower pressing plate 300 and a lower insulating plate 1300 arranged in sequence, and a plurality of the electrolysis assemblies 100 stacked together are arranged between the upper insulating plate 1200 and the lower insulating plate 1300. The parallel-series structure proton membrane water electrolysis hydrogen production device also includes a plurality of first locking screws (not shown in the drawings) and locking nuts, an insulating layer is provided on the outer wall of the first locking screw, the first locking screw passes through the upper pressing plate 200, the upper insulating plate 1200, the negative metal plate 1, the insulating support plate 3, the positive metal plate 2, the lower insulating plate 1300 and the lower pressing plate 300 and is locked with the locking nut, and a plurality of the first locking screws are distributed around the electrolysis chamber 1001 of the electrolysis assembly 100. Several electrolytic assemblies 100 are pressed and installed between the upper pressing plate 200 and the lower pressing plate 300; several first mounting holes 32 are also provided on the insulating support plate 3, and the several first mounting holes 32 are distributed around the multiple electrolytic through holes 31. The negative metal plate 1 and the positive metal plate 2 are correspondingly provided with second mounting holes 12, and the upper pressing plate 200 and the lower pressing plate 300 are correspondingly provided with third mounting holes 2001. The first locking screw passes through the first mounting hole 32, the second mounting hole 12, and the third mounting hole 2001, and then cooperates with a nut (not shown in the drawings) to complete the compression of several electrolytic assemblies 100. By locking the first locking screws and nuts around, and cooperating with the high-strength insulating support plate 3, the deformation of each component in the electrolytic device during operation can be well reduced, thereby ensuring the hydrogen production effect and avoiding the warping of the plate.

[0042] In some optional implementations, such as Figures 1 to 3As shown, the parallel-series structure proton membrane water electrolysis hydrogen production device also includes a second locking screw (not shown in the drawings), a first avoidance groove 13 is opened on the opposite sides of the adjacent negative metal pole plates 1, and a second avoidance groove 22 corresponding to the upper and lower positions of the first avoidance groove 13 is opened on the opposite sides of the adjacent positive metal pole plates 2, a fourth mounting hole 33 is correspondingly opened on the insulating support plate 3, and a fifth mounting hole 2002 is correspondingly opened on the upper pressure plate 200 and the lower pressure plate 300, and the second locking screw passes through the fifth mounting hole 2002, the first avoidance groove 13, the fourth mounting hole 33, and the second avoidance groove 22 and then cooperates with a nut (not shown in the drawings) to strengthen the compression of the plurality of electrolytic components 100. Compared with opening an independent mounting hole on this side of each negative metal plate 1, the first avoidance groove 13 is used, and the required width is more than half smaller, and the occupied area is small, ensuring that the area of ​​the electrolysis chamber 1001 accounts for the horizontal direction of the electrolysis assembly 100, thereby ensuring power.

[0043] In some optional implementations, such as Figures 1 to 9 As shown, the parallel-series structure proton membrane water electrolysis hydrogen production device also includes a third locking screw (not shown in the drawings), and each negative metal plate 1 is provided with more than two negative flow channel grooves 11; the negative metal plate 1 is provided with a sixth mounting hole 14 between any two adjacent negative flow channel grooves 11, the positive metal plate 2 is provided with a seventh mounting hole 23, the insulating support plate 3 is provided with an eighth mounting hole 34, and the upper pressing plate 200 and the lower pressing plate 300 are provided with a ninth mounting hole 2003, and the third locking screw passes through the sixth mounting hole 14, the seventh mounting hole 23, the eighth mounting hole 34, and the ninth mounting hole 2003 and then cooperates with a nut (not shown in the drawings) to further strengthen the compression of the electrolytic components 100. As a preferred embodiment, the number of negative flow channel grooves 11 on each negative metal plate 1 is two, and the two negative flow channel grooves 11 are arranged side by side along the length direction of the negative metal plate 1. Compared with the prior art: the metal plate is provided with a flow groove with a larger area, and the pressing position, i.e., the position of the non-flow groove, is only located at the periphery of the metal plate, and the area on the metal plate far away from the pressing position, such as the middle position of the flow groove, is easily deformed under the action of pressure; the parallel-series structure proton membrane water electrolysis hydrogen production device provided by the embodiment of the present invention has two or more negative electrode flow grooves 11 on each negative electrode metal plate 1, and similarly, two or more positive electrode flow grooves 21 on each positive electrode metal plate 2, which is equivalent to adding a pressing area in the middle position, reducing the area of ​​a single electrolysis chamber 1001, and reducing the distance from the middle position to the edge position (i.e., the force arm) where the risk of compression deformation of the electrolysis chamber 1001 is the greatest, making deformation difficult, small dimensional tolerance during operation, and ensuring work efficiency.

[0044] In some optional embodiments, such as Figures 1 to 9 As shown, at least one first water inlet interface 15 is provided on the negative metal plate 1, at least one second water inlet interface 24 is provided on the positive metal plate 2, and more than two third water inlet interfaces 35 are provided on the insulating support plate 3, and the first water inlet interface 15, the second water inlet interface 24, and the third water inlet interface 35 are connected one by one to form a water inlet hole 400; at least two first drainage holes 25 are provided on the positive metal plate 2, and each of the water inlet holes 400 is connected to a corresponding positive flow channel groove 21 through at least one of the first drainage holes 25; as shown Figure 7 , Fig. 9 , Fig.10 As shown, the positive metal plate 2 is also provided with a second drainage hole 26, which is connected to two positive flow channel grooves 21 located on the same positive metal plate 2. Electrolysis is connected to multiple electrolytic chambers 1001 on the same layer through the second drainage hole 26, which is conducive to balancing the pressure in the multiple electrolytic chambers 1001 and reducing the risk of large deformation caused by excessive local pressure.

[0045] In some optional embodiments, such as Figures 1 to 9 As shown, at least one first water outlet interface is provided on the negative metal plate 1, at least one second water outlet interface is provided on the positive metal plate 2, and at least two third water outlet interfaces are provided on the insulating support plate 3. The first water outlet interface, the second water outlet interface, and the third water outlet interface are connected one by one to form a water outlet hole 5, and the water outlet hole is connected to the electrolysis chamber 1001. The water outlet hole 5 is connected to a corresponding positive flow channel groove 21 through at least one of the first drainage water holes 25.

[0046] In some optional embodiments, a fifth sealing ring is provided in the third water outlet interface, and the fifth sealing ring is sealed and pressed between the lower side of the negative metal pole plate 1 and the upper side of the positive metal pole plate 2; a third sealing groove is opened between the negative metal pole plate 1 and the positive metal pole plate 2 that are fitted together, and the third sealing groove is annular, and the water outlet hole 5 passes through the inner circle of the third sealing groove, and the third sealing groove is provided with a sixth sealing ring, and the sixth sealing ring simultaneously realizes the sealing of the gap between the positive metal pole plate and the insulating support plate 3 and the gap between the negative metal pole plate 1 and the insulating support plate 3.

[0047] More specifically, the two positive flow channel grooves 21 are each provided with a second drainage hole 26, the second drainage hole 26 penetrates the positive metal pole plate 2, and the first drainage groove 27 is provided on the upper side of the negative metal pole plate 1 and / or the lower side of the positive metal pole plate 2, and the two ends of the first drainage groove 27 are respectively connected to the second drainage hole 26, thereby realizing the connection between the two positive flow channel grooves 21; further, in some optional embodiments, an intermediate water channel sealing ring 500 is provided between the negative metal pole plate 1 and the positive metal pole plate 2, and a circle of intermediate water channel sealing groove 261 is provided on the upper side of the negative metal pole plate 1 and / or the lower side of the positive metal pole plate 2, and the intermediate water channel sealing groove 261 is annular, the second drainage hole 26 and the first drainage groove 27 are located in the inner circle of the intermediate water channel sealing groove 261, and the intermediate water channel sealing ring 500 is installed in the intermediate water channel sealing groove 261 for sealing the gap of the second drainage water hole 26.

[0048] In some optional embodiments, such as Figures 1 to 9 As shown, a first sealing ring 600 is provided in the third water inlet interface 35, and the first sealing ring 600 is sealed and pressed between the lower side of the negative metal pole plate 1 and the upper side of the positive metal pole plate 2; a first sealing groove 241 is opened between the negative metal pole plate 1 and the positive metal pole plate 2 that are fitted together, and the first sealing groove 241 is annular, and the water inlet hole 400 passes through the inner circle of the first sealing groove 241, and the first sealing groove 241 is provided with a second sealing ring 700.

[0049] In some optional embodiments, such as Figures 1 to 9 As shown, at least one first gas outlet interface 16 is provided on the negative metal plate 1, at least one second gas outlet interface 28 is provided on the positive metal plate 2, and more than two third gas outlet interfaces 36 are provided on the insulating support plate 3, and the first gas outlet interface 16, the second gas outlet interface 28, and the third gas outlet interface 36 are connected one by one to form a hydrogen outlet hole 800; at least one first drainage air hole 17 is provided on the negative metal plate 1, and each of the hydrogen outlet holes 800 is connected to a corresponding negative electrode flow channel groove 11 through the first drainage air hole 17; the negative metal plate 1 is also provided with a second drainage air hole 18, and the second drainage air hole 18 is connected to two negative electrode flow channel grooves 11 located on the same negative metal plate 1. Similar to the first drainage water hole 25, the two negative electrode flow channel grooves 11 are connected through the second drainage air hole 18, which is conducive to balancing the pressure on the hydrogen side in multiple electrolytic chambers 1001 and reducing the risk of large deformation caused by excessive local pressure.

[0050] Specifically, the water outlet hole 5 and the hydrogen outlet hole 800 are located on the same side of the negative metal pole plate 1 , the insulating support plate 3 , and the positive metal pole plate 2 .

[0051] More specifically, the two negative electrode flow channel grooves 11 are each provided with a second drainage hole 18, and the second drainage hole 18 penetrates the negative electrode flow channel groove 11, and the second drainage groove 19 is provided on the upper side of the negative metal pole plate 1 and / or the lower side of the positive metal pole plate 2, and the two ends of the second drainage groove 19 are respectively connected to two second drainage holes 18, thereby realizing the connection between the two negative electrode flow channel grooves 11; further, an intermediate airway sealing ring 900 is provided between the negative metal pole plate 1 and the positive metal pole plate 2, and a circle of intermediate airway sealing grooves 181 are provided on the upper side of the negative metal pole plate 1 and / or the lower side of the positive metal pole plate 2, and the intermediate airway sealing groove 181 is annular, and the second drainage holes 18 and the second drainage grooves 19 are located in the inner circle of the intermediate airway sealing groove 181, and the intermediate airway sealing ring 900 is installed in the intermediate airway sealing groove 181 for sealing the gap of the second drainage hole 18.

[0052] In some optional embodiments, such as Figures 1 to 9 As shown, a third sealing ring 1000 is provided in the third gas outlet interface 36, and the third sealing ring 1000 is sealed and pressed between the lower side of the negative metal pole plate 1 and the upper side of the positive metal pole plate 2; a second sealing groove 281 is provided between the negative metal pole plate 1 and the positive metal pole plate 2 which are fitted to each other, and the second sealing groove 281 is annular, and the hydrogen outlet hole 800 passes through the inner circle of the second sealing groove 281, and the second sealing groove 281 is provided with a fourth sealing ring 1100, and the fourth sealing ring 1100 simultaneously realizes the sealing of the gap between the positive metal pole plate 2 and the insulating support plate 3 and the gap between the negative metal pole plate 1 and the insulating support plate 3.

[0053] In some optional embodiments, such as Figures 1 to 9As shown, the electrolysis assembly 100 also includes a plurality of electrolysis units 4, each of which is installed in one of the electrolysis chambers 1001; the electrolysis unit 4 includes an upper gas diffusion layer 41, a lower gas diffusion layer 42, a proton membrane 43, an upper membrane sealing ring 44 and a lower membrane sealing ring 45, and the upper gas diffusion layer 41, the proton membrane 43 and the lower gas diffusion layer 42 are sequentially stacked and installed in the electrolysis chamber 1001; the upper membrane sealing ring 44 and the lower membrane sealing ring 45 are respectively located on the upper and lower sides of the proton membrane 43, and the proton membrane 43 is clamped under the pressure of the negative metal plate 1 and the positive metal plate 2, the upper gas diffusion layer 41 is located in the inner circle of the upper membrane sealing ring 44, and the lower gas diffusion layer 42 is located in the inner circle of the lower membrane sealing ring 45. More specifically, in some preferred embodiments, the upper membrane sealing ring 44, the lower membrane sealing ring 45 and the outer side of the proton membrane 43 are all in contact with the side of the electrolysis through hole 31. In this way, compared with the non-contact or incomplete contact mode, the upper membrane sealing ring 44 and the lower membrane sealing ring 45 have a larger sealing area and are limited, so that they are not easily moved or deformed in the horizontal direction, and the sealing effect is good.

[0054] In some optional embodiments, such as Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the parallel-series structure proton membrane water electrolysis hydrogen production device also includes an upper insulating plate 1200 and a lower insulating plate 1300 . The upper insulating plate 1200 is arranged on the lower side of the upper pressing plate 200 , and the lower insulating plate 1300 is arranged on the upper side of the lower pressing plate 300 .

[0055] In some optional embodiments, the insulating support plate 3 is made of insulating polymer material.

[0056] The parallel-series structure proton membrane water electrolysis hydrogen production device of the present invention comprises two or more groups of metal plates arranged side by side in a parallel mode, and each group of metal plates is arranged in a series mode in the longitudinal or transverse direction, and the electrolysis units on the metal plates are connected. An insulating support plate is provided between the upper and lower metal plates, and all the metal plates on the same layer are laid flat. The metal plates, the insulating support plate 3, the electrolysis units and the like are stacked in multiple layers to form an electrolysis device. The parallel-series structure proton membrane water electrolysis hydrogen production device provided by the present invention uses the insulating support plate 3 as a skeleton, and multiple electrolysis chambers 1001 are arranged in the transverse and longitudinal directions of the metal plates and the metal plates are spliced ​​in the transverse and longitudinal directions to form multiple electrolysis chambers 1001 in the same layer, thereby increasing the effective working area of ​​the single-layer electrolysis assembly 100, and then realizing the improvement of the power of the electrolytic cell.

[0057] The parallel-series proton membrane water electrolysis hydrogen production device provided by the embodiment of the present invention has the following beneficial effects:

[0058] 1. The insulating support plate 3 is used as the middle frame of the electrolytic assembly 100. The thickness is relatively thicker than the electrolytic plate. Since the insulating support plate 3 has no requirements for conductivity, a material with higher strength can be used in the material selection. The insulating support plate 3 can withstand higher pressure and has no great restrictions on the horizontal size. The insulating support plate 3 is used as the skeleton, and a single-layer electrolytic assembly 100 is formed by splicing multiple electrolytic plates above and below the insulating support plate 3. Multiple electrolytic chambers 1001 are formed on the same layer, thereby increasing the effective working area of ​​the single-layer electrolytic assembly 100 and improving the power of the electrolytic cell.

[0059] 2. In a preferred embodiment, by adding a screw between adjacent electrolytic chambers 1001, the pressure is made more uniform, which is beneficial to the control of the size change of each component of the electrolytic assembly 100 during the hydrogen production process and ensures the hydrogen production effect;

[0060] 3. In a preferred embodiment, a plurality of positive electrode flow channel grooves 21 (negative electrode flow channel grooves 11) are provided on a single positive electrode metal plate 2 (negative electrode metal plate 1), and mounting holes are provided between adjacent positive electrode flow channel grooves 21 (negative electrode flow channel grooves 11), and screws are used to make the pressure more uniform and the dimensional change control effect of the hydrogen production process better.

[0061] 4. In a preferred embodiment, the negative metal plate 1, the insulating support plate 3 and the positive metal plate 2 are directly bonded together, and the seal of the electrolytic chamber 1001 is arranged in the hollow position in the middle of the insulating support plate 3, and does not participate in the control of the overall thickness dimension. The dimension control is simple during the assembly of the electrolytic device, and the stability of the device is greatly improved.

[0062] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A parallel-series structure proton membrane water electrolysis hydrogen production device, characterized in that: It comprises a plurality of electrolytic assemblies stacked together in sequence, wherein the electrolytic assemblies comprise an insulating support plate and two or more groups of metal plates arranged side by side, each group of the metal plates is provided with at least two electrolytic chambers, and two adjacent electrolytic chambers are connected, the metal plates comprise a stacked negative metal plate and a positive metal plate, and the insulating support plate is arranged between the negative metal plate and the positive metal plate.

2. The parallel-series structure proton membrane water electrolysis hydrogen production device according to claim 1, characterized in that: The electrolysis assembly also includes a plurality of electrolysis units, each of which is installed in one of the electrolysis chambers; the insulating support plate is a flat plate, and the thickness of the insulating support plate is equal to the thickness of the electrolysis unit under the compression of the negative metal plate and the positive metal plate.

3. The parallel-series proton membrane water electrolysis hydrogen production device according to claim 2, characterized in that: At least one water inlet hole, at least one water outlet hole and at least one hydrogen outlet hole are provided on the negative metal pole plate, the insulating support plate and the positive metal pole plate. At least one positive flow channel groove and at least one negative flow channel groove are respectively provided on one side of the positive metal pole plate and the negative metal pole plate for bonding with the insulating support plate. At least two first drainage water holes and at least one second drainage water hole are provided on the other side of the positive metal pole plate. At least one first drainage air hole and at least one second drainage air hole are provided on the other side of the negative metal pole plate. Each of the water inlet holes and each of the water outlet holes are connected to a corresponding positive flow channel groove through at least one first drainage water hole, and the second drainage water hole is connected to two positive flow channel grooves located on the same positive metal pole plate. Each of the hydrogen outlet holes is connected to a corresponding negative flow channel groove through the first drainage air hole, and the second drainage air hole is connected to two negative flow channel grooves located on the same negative metal pole plate.

4. The parallel-series structure proton membrane water electrolysis hydrogen production device according to claim 3, characterized in that: A first sealing ring is provided in the water inlet hole, and a third sealing ring is provided in the hydrogen outlet hole. The first sealing ring and the third sealing ring are both sealed and pressed between the lower side of the negative metal plate and the upper side of the positive metal plate. A first sealing groove and a second sealing groove are provided between the negative metal plate and the positive metal plate that are fitted together. The first sealing groove and the second sealing groove are both annular. The water inlet hole passes through the inner circle of the first sealing groove, and the hydrogen outlet hole passes through the inner circle of the second sealing groove. The first sealing groove is provided with a second sealing ring, and the second sealing groove is provided with a fourth sealing ring.

5. The parallel-series structure proton membrane water electrolysis hydrogen production device according to claim 1, characterized in that: The gap between the two adjacent groups of metal plates is a narrow gap, and the narrow gap is filled with conductive glue.

6. The parallel-series proton membrane water electrolysis hydrogen production device according to claim 2, characterized in that: The parallel-series structure proton membrane water electrolysis hydrogen production device also includes an upper pressure plate, an upper insulating plate, a lower insulating plate and a lower pressure plate which are arranged in sequence, and a plurality of the electrolysis components stacked together are arranged between the upper insulating plate and the lower insulating plate.

7. The parallel-series proton membrane water electrolysis hydrogen production device according to claim 6, characterized in that: The electrolysis unit comprises an upper gas diffusion layer, a lower gas diffusion layer, a proton membrane, an upper membrane sealing ring and a lower membrane sealing ring. The upper gas diffusion layer, the proton membrane and the lower gas diffusion layer are sequentially stacked and installed in the electrolysis chamber. The upper membrane sealing ring and the lower membrane sealing ring are respectively located on the upper and lower sides of the proton membrane, and the proton membrane is clamped under the pressure of the negative metal plate and the positive metal plate. The upper gas diffusion layer is located in the inner ring of the upper membrane sealing ring, and the lower gas diffusion layer is located in the inner ring of the lower membrane sealing ring.

8. The parallel-series proton membrane water electrolysis hydrogen production device according to claim 6, characterized in that: The parallel-series structure proton membrane water electrolysis hydrogen production device includes a plurality of first locking screws and a plurality of locking nuts. The first locking screws pass through the upper pressure plate, the upper insulating plate, the negative metal plate, the insulating support plate, the positive metal plate, the lower insulating plate and the lower pressure plate and are locked with the locking nuts. The plurality of first locking screws are distributed around the electrolysis chamber of the electrolysis assembly.

9. The parallel-series proton membrane water electrolysis hydrogen production device according to claim 8, characterized in that: An insulating layer is provided on the outer wall of the first locking screw.

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