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

Abstract

The utility model discloses a parallel-series structure proton membrane water electrolysis hydrogen production device, and belongs to the field of polymer ion membrane water electrolysis. The device comprises two or more groups of metal polar plates which are arranged side by side in a parallel connection mode, each group of metal polar plates is provided with at least two electrolysis units in a longitudinal or transverse series connection 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, the effective working area of a single-layer electrolysis assembly is increased, and the power of an electrolytic bath is improved.

Description

Technical Field

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

[0002] The application scale of proton membrane electrolysis for hydrogen production is growing, and the power demand for electrolyzers is increasing. The components of the electrolyzer are made of thin materials. For example, the thickness of the proton membrane is usually 0.185mm, and the thickness of the electrolytic plate is also small. The electrolyzer is composed of hundreds of electrolytic cells stacked together. After assembly, the contact resistance between the entire proton membrane surface and the electrolytic plate must be low and uniform. Control of the clamping force and size is very critical. The existing clamping method uses two upper and lower pressure plates in conjunction with screws arranged around the electrolytic chamber to achieve the clamping of the electrolytic cell. The pressure of the gas during the electrolysis of water to produce hydrogen is as high as 3MPa. In order to better control the thickness tolerance of the electrolytic cell during the hydrogen production process, the length and width dimensions of the commonly used electrolytic plates are controlled within a certain range. The area of ​​the electrolytic chamber cannot be large. In addition, the width dimensions of some components are also limited. In other words, the horizontal dimensions of the existing electrolyzer are limited, and the power of the electrolyzer is also limited.

[0003] Therefore, the prior art needs to be improved. Utility Model Content

[0004] In view of this, the utility model provides a parallel-series structure proton membrane water electrolysis hydrogen production device, 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 further comprises 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.

[0007] Preferably, the negative metal pole plate, the insulating support plate and the positive metal pole plate are provided with at least one water inlet hole, at least one water outlet hole and at least one hydrogen outlet hole; the positive metal pole plate and the negative metal pole plate are respectively provided with at least one positive flow channel groove and at least one negative flow channel groove on one side for contacting 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 hole and each of the water outlet holes is connected to a corresponding positive flow channel groove through at least one first drainage water hole; 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, and a third sealing ring is provided in the hydrogen outlet. 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 bonded to each other. The first sealing groove and the second sealing groove are both annular. The water inlet passes through the inner ring of the first sealing groove, and the hydrogen outlet passes through the inner ring 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 the 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 further 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 includes 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 stacked in sequence 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] The implementation 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 does not have any requirements for conductivity, a higher-strength material can be used in the material selection. It can withstand higher pressure and has no major restrictions on horizontal dimensions. With it as the skeleton, 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 controlling the dimensional changes of various components of the electrolysis assembly during the hydrogen production process and ensuring the hydrogen production effect;

[0017] 3. In the preferred solution, multiple positive (negative) electrode flow channel grooves are opened on the single positive (negative) electrode electrolytic plate, and mounting holes are opened between two adjacent (negative) electrode flow channel grooves. In combination with the screw, the pressure is made 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0019] in:

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

[0021] Figure 2 This is a schematic diagram of the top view 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 point 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] Figure 9 for Figure 7 Magnified view at H in the middle;

[0029] Figure 10 This is a bottom view of the positive metal plate in one embodiment of the present invention.

[0030] The accompanying drawings are marked as follows: 100, electrolysis assembly; 1001, electrolysis chamber; 200, upper pressure plate; 2001, third mounting hole; 2002, fifth mounting hole; 2003, ninth mounting hole; 300, lower pressure plate; 400, water inlet; 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 hole; 18, second drainage hole Hole; 181, intermediate air channel 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 water channel 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] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided 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 pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0033] It is understood that the singular forms "a", "an", and "the" may also include plural forms, unless the context clearly indicates otherwise. It is also understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integers, 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 the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only. In the present utility model, the orientation or positional 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 positional relationship shown in the accompanying drawings. These terms are mainly for better describing the present utility model 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, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. 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 utility model can be understood according to the specific circumstances.

[0035] Furthermore, the terms "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0036] Reference Figures 1 to 10 A parallel-series proton membrane water electrolysis hydrogen production device includes a plurality of electrolytic assemblies 100 stacked together in sequence. The electrolytic assemblies 100 include an insulating support plate 3 and two or more sets of metal plates arranged side by side. Each set of metal plates is provided with at least two electrolytic chambers 1001, and two adjacent electrolytic chambers 1001 are connected. The metal plates include a stacked negative metal plate 1 and a positive metal plate 2. The insulating support plate 3 is provided between the negative metal plate 1 and the positive metal plate 2. The metal plates are 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 electrode flow channel 11 on the lower side, and each of the positive metal plates 2 is provided with at least one positive electrode flow channel 21 on the upper side, and the insulating support plate 3 is provided with a plurality of A plurality of electrolytic through holes 31, the negative electrode flow channel 11, the electrolytic through holes 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 holes 31, and the positive electrode flow channel 21 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 walls of the electrolytic through holes 31 constitute the side walls of the electrolytic chamber 1001. As an example, Figure 1 and Figure 7 As shown, in this embodiment, the number of the negative metal plates 1 and the positive metal plates 2 in each electrolytic component 100 is two; the two negative metal plates 1 are arranged side by side along the width direction thereof, and similarly, the two positive metal 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, which limits the working efficiency of the electrolysis device; 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. Since the insulating support plate 3 has no requirements such as conductive performance, a higher strength material can be used in material selection, which can withstand higher pressure and has no major restrictions on horizontal size. It is used as a 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, thereby 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 further includes a plurality of electrolysis units 4, each of the electrolysis units 4 being installed in one of the electrolysis chambers 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. The plurality of first locking screws are distributed around the electrolysis chamber 1001 of the electrolysis assembly 100. Several of the electrolytic assemblies 100 are compressed and installed between the upper pressing plate 200 and the lower pressing plate 300; the insulating support plate 3 is also provided with several first mounting holes 32, 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. 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 accompanying drawings) to complete the compression of the several electrolytic assemblies 100. By locking with the first locking screws and nuts on all sides, combined with the high-strength insulating support plate 3, the deformation of each component in the electrolytic device during operation can be greatly reduced, thereby ensuring the hydrogen production effect and preventing the plate from warping.

[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), and a first avoidance groove 13 is provided on the opposite sides of the adjacent negative metal plates 1, and a second avoidance groove 22 corresponding to the upper and lower positions of the first avoidance groove 13 is provided on the opposite sides of the adjacent positive metal plates 2. A fourth mounting hole 33 is correspondingly provided on the insulating support plate 3, and a fifth mounting hole 2002 is correspondingly provided on the upper pressure plate 200 and the lower pressure plate 300. 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 several 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. The required width is more than half smaller, the occupied area is small, and the area of ​​the electrolysis chamber 1001 is ensured to account for the horizontal proportion 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 two or more negative electrode flow channel grooves 11; a sixth mounting hole 14 is provided on the negative metal plate 1 between any two adjacent negative electrode flow channel grooves 11, a seventh mounting hole 23 is provided on the positive metal plate 2, an eighth mounting hole 34 is provided on the insulating support plate 3, and a ninth mounting hole 2003 is provided on the upper pressing plate 200 and the lower pressing plate 300. 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 several electrolytic components 100. As a preferred embodiment, the number of negative electrode flow channel grooves 11 on each negative metal plate 1 is two, and the two negative electrode 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, that is, the non-flow groove position, is only located at the periphery of the metal plate. The area on the metal plate away from the pressing position, such as the middle position of the flow groove, is easy to deform under the action of pressure; the parallel-series structure proton membrane electrolysis water 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. Similarly, the number of positive electrode flow grooves 21 on each positive electrode metal plate 2 is two or more, 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 (that is, 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. 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 first drainage hole 25; Figure 7 、 Figure 9 、 Figure 10 As shown, the positive metal plate 2 is further provided with a second drainage hole 26, which connects two positive flow channel grooves 21 located on the same positive metal plate 2. Electrolysis is connected to multiple electrolysis chambers 1001 on the same layer through the second drainage hole 26, which helps balance the pressure within the multiple electrolysis chambers 1001 and reduce the risk of large deformation caused by excessive local pressure.

[0045] In some optional embodiments, such as Figures 1 to 9 As shown, the negative metal plate 1 is provided with at least one first water outlet interface, the positive metal plate 2 is provided with at least one second water outlet interface, and the insulating support plate 3 is provided with two or more third water outlet interfaces. The first water outlet interface, the second water outlet interface, and the third water outlet interface are connected in a one-to-one correspondence to form a water outlet hole 5, which is connected to the electrolysis chamber 1001. The water outlet hole 5 is connected to a corresponding positive electrode flow channel groove 21 through at least one first drainage hole 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 in contact with each other, and the third sealing groove is annular, and the water outlet hole 5 passes through the inner ring of the third sealing groove. 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 electrode flow channel grooves 21 are each provided with a second drainage hole 26, the second drainage hole 26 passes through the positive metal pole plate 2, and the upper side surface of the negative metal pole plate 1 and / or the lower side surface of the positive metal pole plate 2 are provided with a first drainage groove 27, 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 electrode 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 surface of the negative metal pole plate 1 and / or the lower side surface of the positive metal pole plate 2, and the intermediate water channel sealing groove 261 is annular, and 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 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 bonded to each other, 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, the negative metal plate 1 is provided with at least one first gas outlet interface 16, the positive metal plate 2 is provided with at least one second gas outlet interface 28, and the insulating support plate 3 is provided with two or more third gas outlet interfaces 36. The first gas outlet interface 16, the second gas outlet interface 28, and the third gas outlet interface 36 are connected in a one-to-one correspondence to form a hydrogen outlet hole 800; the negative metal plate 1 is provided with at least one first drainage hole 17, each hydrogen outlet hole 800 is connected to a corresponding negative electrode flow channel groove 11 through the first drainage hole 17; the negative metal plate 1 is also provided with a second drainage hole 18, which connects two negative electrode flow channel grooves 11 located on the same negative metal plate 1. Similar to the first drainage hole 25, connecting the two negative electrode flow channel grooves 11 through the second drainage hole 18 helps balance the pressure on the hydrogen side of multiple electrolysis chambers 1001 and reduces the risk of large deformation caused by excessive local pressure.

[0050] Specifically, the water outlet 5 and the hydrogen outlet 800 are located on the same side of the negative metal plate 1 , the insulating support plate 3 , and the positive metal 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 passes through the negative electrode flow channel groove 11, and a 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 groove 181 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 airway sealing groove 181 is annular, and the second drainage hole 18 and the second drainage groove 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 opened between the negative metal pole plate 1 and the positive metal pole plate 2 that are bonded to each other, and the second sealing groove 281 is annular, and the hydrogen outlet hole 800 passes through the inner ring of the second sealing groove 281. 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 installed in the electrolysis chamber 1001 in a stacked manner; 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 clamp the proton membrane 43 under the pressure of the negative metal plate 1 and the positive metal plate 2, the upper gas diffusion layer 41 is located on the inner ring of the upper membrane sealing ring 44, and the lower gas diffusion layer 42 is located on the inner ring 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 edges of the proton membrane 43 are all in contact with the side surfaces of the electrolysis through-hole 31. Thus, compared to a non-contact or incomplete contact, the upper membrane sealing ring 44 and the lower membrane sealing ring 45 have a larger sealing area and are limited in position, making them less likely to move or deform horizontally, thereby achieving a better sealing effect.

[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 includes two or more groups of metal plates arranged side by side in parallel mode, and each group of metal plates is arranged in series mode in the longitudinal or transverse direction with at least two electrolysis units, 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, insulating support plates 3, 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 utility model uses the insulating support plate 3 as a skeleton, and forms multiple electrolysis chambers 1001 on the same layer by arranging multiple electrolysis chambers 1001 in the transverse and longitudinal directions of the metal plates and splicing the metal plates in the transverse and longitudinal directions, thereby increasing the effective working area of ​​the single-layer electrolysis assembly 100, and further achieving an increase in the power of the electrolytic cell.

[0057] The parallel-series structure proton membrane water electrolysis hydrogen production device provided by the embodiment of the utility model has the following features:

[0058] Beneficial effects:

[0059] 1. An insulating support plate 3 is used as the middle frame of the electrolytic assembly 100. The thickness is relatively thicker than the electrolytic plates. Since the insulating support plate 3 does not have any requirements for conductivity, a high-strength material can be used in the material selection. It can withstand high pressure and has no significant restrictions on horizontal dimensions. The insulating support plate 3 serves as the skeleton, and multiple electrolytic plates are spliced ​​above and below it to form a single-layer electrolytic assembly 100. Multiple electrolytic chambers 1001 are formed on the same layer, thereby increasing the effective working area of ​​the single-layer electrolytic assembly 100 and thereby improving the power of the electrolytic cell.

[0060] 2. In a preferred embodiment, screws are added between adjacent electrolysis chambers 1001 to make the pressure more uniform, which is beneficial for controlling the dimensional changes of various components of the electrolysis assembly 100 during the hydrogen production process and ensuring the hydrogen production effect;

[0061] 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.

[0062] 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 electrolysis chamber 1001 is provided 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 size control during assembly of the electrolysis device is simple, and the stability of the device is greatly improved.

[0063] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A parallel-series proton membrane water electrolysis hydrogen production device, characterized by: It includes several electrolytic components stacked together in sequence, and the electrolytic components include an insulating support plate and two or more groups of metal plates arranged side by side. Each group of metal plates is provided with at least two electrolytic chambers, and two adjacent electrolytic chambers are connected. The metal plates include stacked negative metal plates and positive metal plates, and the insulating support plate is arranged between the negative metal plates and the positive metal plates.

2. The parallel-series 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 pressure of the negative metal plate and the positive metal plate.

3. The parallel-series structure proton membrane water electrolysis hydrogen production device according to claim 2, characterized in that: The negative metal pole plate, the insulating support plate and the positive metal pole plate are provided with at least one water inlet hole, at least one water outlet hole and at least one hydrogen outlet hole. The positive metal pole plate and the negative metal pole plate are respectively provided with at least one positive flow channel groove and at least one negative flow channel groove on one side for contacting 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 hole and each of the water outlet holes is 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 the 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 the 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, and a third sealing ring is provided in the hydrogen outlet. 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 bonded to each other, and the first sealing groove and the second sealing groove are both annular. The water inlet passes through the inner ring of the first sealing groove, and the hydrogen outlet passes through the inner ring 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 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 arranged in sequence, and a plurality of stacked electrolysis components 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 includes 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 stacked in sequence 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 clamp the proton membrane under the pressure of the negative metal plate and the positive metal plate. The upper gas diffusion layer is located on the inner ring of the upper membrane sealing ring, and the lower gas diffusion layer is located on the inner ring of the lower membrane sealing ring.

8. The parallel-series structure 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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