Integrated Capacitor Device for Hydrogen Production and Energy Storage via Water Electrolysis

Abstract

This invention provides an integrated electrolysis-hydrogen production and energy storage capacitor device, comprising a shell, three sets of electrolysis-energy storage units, a main circulation channel, a gas guiding cavity, and a gas outlet. The shell has an internal cavity, and the three sets of electrolysis-energy storage units are arranged in a triangular pattern in the middle layer of the shell. These three sets of units include a lower left electrolysis-energy storage unit, a lower right electrolysis-energy storage unit, and an upper electrolysis-energy storage unit. The main circulation channel is located in the bottom layer of the shell and is U-shaped. By integrating the three sets of electrolysis-energy storage units in a triangular pattern within the same shell, this invention eliminates the redundant connecting pipes and cables between the electrolysis device and the energy storage device in traditional separate designs, significantly reducing the overall system size. It is particularly suitable for space-constrained scenarios such as distributed energy sites and mobile hydrogen energy devices. The use of L-shaped copper sheets to directly connect the electrolysis-energy storage units in series shortens the circuit transmission path and reduces line losses during power transmission.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen energy and energy storage technology, and more specifically, it relates to an integrated capacitor device for hydrogen production and energy storage via water electrolysis. Background Technology

[0002] Under the global trend of energy structure transformation towards low-carbon and clean energy, water electrolysis hydrogen production technology, with its characteristic of directly utilizing renewable energy sources such as photovoltaic and wind power to produce hydrogen, has become a key link connecting the renewable energy and hydrogen energy industry chain. This technology converts electrical energy into hydrogen energy storage through electrolysis, enabling not only large-scale energy storage but also providing a zero-carbon emission energy carrier for transportation, industry, and other fields. It plays an irreplaceable role in the energy internet and the achievement of "dual-carbon" goals. Combining water electrolysis hydrogen production with energy storage is an important way to solve the volatility of renewable energy and improve energy utilization efficiency, and has received widespread attention from academia and industry in recent years.

[0003] However, most water electrolysis hydrogen production and energy storage devices currently on the market adopt a split layout, that is, the electrolyzer and the energy storage capacitor are set up as independent devices. This design requires laying long connecting pipelines (for electrolyte circulation or gas transmission) and cables (for power transmission) between the two, which not only increases the overall footprint and volume of the system, but also requires special planning of pipeline and cable routing during installation. This places high demands on the space conditions of the installation site, especially in space-constrained scenarios such as distributed energy sites (such as home photovoltaic systems) and mobile hydrogen energy devices (such as hydrogen emergency power vehicles). This split structure often fails to meet the requirements of compact installation, limiting the further expansion of its application scope.

[0004] Therefore, in view of this, we will study and improve the existing structure and its shortcomings, and provide an integrated capacitor device for hydrogen production and energy storage through water electrolysis, in order to achieve a more practical value. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an integrated capacitor device for hydrogen production and energy storage via water electrolysis, which is achieved through the following specific technical means:

[0006] The integrated electrolysis-hydrogen production and energy storage capacitor device includes a shell, three sets of electrolysis-energy storage units, a main circulation channel, a gas guiding cavity, and a gas outlet. The shell is hollow inside. The three sets of electrolysis-energy storage units are arranged in a triangular pattern in the middle layer of the shell. The three sets of electrolysis-energy storage units include a lower left electrolysis-energy storage unit, a lower right electrolysis-energy storage unit, and an upper electrolysis-energy storage unit. The main circulation channel is located in the bottom layer of the shell and is distributed in a U-shape. It is connected to each electrolysis-energy storage unit through branch pipes. The gas guiding cavity includes a hydrogen guiding cavity and an oxygen guiding cavity, located on the left and right sides of the electrolysis-energy storage unit, respectively. The gas outlet includes a hydrogen outlet and an oxygen outlet, which are located on the top of the shell and connected to the corresponding gas guiding cavity through a conical connector.

[0007] Preferably, it also includes an L-shaped copper sheet, which is used to realize the circuit series connection between the lower left electrolysis-energy storage unit, the lower right electrolysis-energy storage unit and the upper electrolysis-energy storage unit.

[0008] Preferably, the right side of the outer casing is provided with an electrolyte injection port, and the left side of the outer casing is provided with a drain port. The electrolyte injection port and the drain port are respectively connected to the two ends of the main circulation channel, and a water pump is connected in series on the main circulation channel.

[0009] Preferably, the bottom four corners of the electrolysis-energy storage unit are provided with positioning posts. Each electrolysis-energy storage unit includes a first current collector, a first composite electrode layer, a composite membrane layer, a second composite electrode layer and a second current collector stacked from bottom to top. Each group of first current collectors has positioning holes at the four corners that cooperate with the positioning posts.

[0010] Preferably, solder joints are provided between the first composite electrode layer and the first current collector, and between the second composite electrode layer and the second current collector. Sealing grooves are provided at the edges of the first composite electrode layer and the second composite electrode layer, and sealing rings are installed in the sealing grooves.

[0011] Preferably, both the hydrogen flow chamber and the oxygen flow chamber are equipped with guide plates, which are inclined.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model integrates three sets of electrolysis-energy storage units in a triangular shape within the same housing, eliminating the redundant connecting pipes and cables between the electrolysis device and the energy storage device in traditional split designs, thus significantly reducing the overall system size. It is particularly suitable for space-constrained scenarios such as distributed energy sites and mobile hydrogen energy devices. The use of L-shaped copper sheets to directly connect each electrolysis-energy storage unit in series shortens the circuit transmission path and reduces line losses during power transmission. At the same time, the gas is quickly discharged through the nearest hydrogen guide cavity, oxygen guide cavity, and conical joint, reducing the pressure loss during gas transmission.

[0014] 2. The integrated structure of this utility model achieves close synergy between electrolytic hydrogen production and energy storage functions, which can better cope with the fluctuating input of renewable energy sources such as photovoltaic and wind power. When there is excess electricity, it can efficiently store electricity and convert it into hydrogen energy. When there is insufficient electricity, it can release the stored energy to maintain the electrolysis process, thereby improving the overall energy utilization efficiency. Through the cooperation of the positioning column and the current collector positioning hole, as well as the sealing ring design of the electrode layer edge, the precise assembly and good sealing of each unit are ensured, reducing the risk of electrolyte leakage. The inclined guide plate avoids gas stagnation in the guide cavity, ensuring the stable operation of the system. Attached Figure Description

[0015] Figure 1 This is a side sectional view of the present invention. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the orthographic section of this utility model. Figure 1 .

[0017] Figure 3 This is a schematic diagram of the orthographic section of this utility model. Figure 2 .

[0018] Figure 4 This is a side sectional view of the present invention. Figure 2 .

[0019] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0020] 1. Outer shell; 2. Hydrogen outlet; 3. Oxygen outlet; 4. Electrolyte injection port; 5. Drain port; 6. Main circulation channel; 7. Water pump; 8. Branch pipe; 9. Positioning column; 10. Lower left electrolysis-energy storage unit; 11. Lower right electrolysis-energy storage unit; 12. Upper electrolysis-energy storage unit; 13. First current collector; 14. First composite electrode layer; 15. Composite diaphragm layer; 16. Second composite electrode layer; 17. Second current collector; 18. L-shaped copper sheet; 19. Hydrogen guide cavity; 20. Oxygen guide cavity; 21. Guide plate; 22. Conical connector. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0026] Figures 1-4 This is the preferred embodiment of the present invention, which is described below in conjunction with... Figures 1-4 The present invention will be further described below.

[0027] This utility model provides an integrated electrolysis hydrogen production and energy storage capacitor device, including a shell 1, three sets of electrolysis-energy storage units, a main circulation channel 6, a gas guiding cavity, and a gas outlet. The shell 1 is hollow inside. The three sets of electrolysis-energy storage units are arranged in a triangular shape in the middle layer of the shell 1. The three sets of electrolysis-energy storage units include a lower left electrolysis-energy storage unit 10, a lower right electrolysis-energy storage unit 11, and an upper electrolysis-energy storage unit 12. The main circulation channel 6 is located in the bottom layer of the shell 1, is U-shaped, and is connected to each electrolysis-energy storage unit through branch pipes 8. The gas guiding cavity includes a hydrogen guiding cavity 19 and an oxygen guiding cavity 20, which are located on the left and right sides of the electrolysis-energy storage unit, respectively. The gas outlet includes a hydrogen outlet 2 and an oxygen outlet 3, which are located on the top of the shell 1 and connected to the corresponding gas guiding cavity through a conical connector 22.

[0028] This also includes an L-shaped copper sheet 18, which is used to realize the circuit series connection between the lower left electrolysis-energy storage unit 10, the lower right electrolysis-energy storage unit 11, and the upper electrolysis-energy storage unit 12. The L-shaped copper sheet 18 directly realizes the circuit series connection between the lower left electrolysis-energy storage unit 10, the lower right electrolysis-energy storage unit 11, and the upper electrolysis-energy storage unit 12, reducing the redundant external wiring between units in the traditional split structure, shortening the current transmission path, and reducing the energy loss caused by line resistance. At the same time, the integrated series design ensures that the current distribution of each unit is uniform, improving the stability and synergistic efficiency of the electrolysis and energy storage process.

[0029] The outer casing 1 has an electrolyte injection port 4 on its right side and a drain port 5 on its left side. The electrolyte injection port 4 and the drain port 5 are connected to the two ends of the main circulation channel 6, respectively. A water pump 7 is connected in series on the main circulation channel 6. The drain port 5 on the left side of the outer casing 1 and the electrolyte injection port 4 on the right side are connected to the two ends of the main circulation channel 6, forming a closed circulation system with the water pump 7. This allows the electrolyte to flow continuously and evenly within the device, ensuring that each electrolysis-energy storage unit is in full contact with the electrolyte and avoiding uneven local reactions. At the same time, the independent injection port and drain port facilitate the replenishment and replacement of the electrolyte, simplifying the device maintenance process and improving the system's sustainable operation capability.

[0030] The electrolysis-energy storage unit has positioning posts 9 at its four bottom corners. Each electrolysis-energy storage unit includes a first current collector 13, a first composite electrode layer 14, a composite membrane layer 15, a second composite electrode layer 16, and a second current collector 17 stacked sequentially from bottom to top. Each set of first current collectors 13 has positioning holes at its four corners that cooperate with the positioning posts 9. The positioning posts 9 at the four bottom corners of the electrolysis-energy storage unit cooperate with the positioning holes of each set of first current collectors 13, realizing the precise stacking of each unit from the first current collector 13 to the second current collector 17. This ensures the relative position stability of the first composite electrode layer 14, the composite membrane layer 15, and the second composite electrode layer 16, avoiding the impact of assembly deviation on electrolysis efficiency. The multi-layer stacked structure integrates electrolysis and energy storage functions into a single unit, reducing the overall size of the equipment and improving space utilization.

[0031] The first composite electrode layer 14 and the first current collector 13 are provided with solder joints, and the second composite electrode layer 16 and the second current collector 17 are provided with solder joints. The edges of the first composite electrode layer 14 and the second composite electrode layer 16 are provided with sealing grooves, and sealing rings are installed in the sealing grooves. The solder joints between the first composite electrode layer 14 and the first current collector 13, and between the second composite electrode layer 16 and the second current collector 17, ensure reliable electrical connection between the electrode layer and the current collector, reduce contact resistance, and reduce power transmission loss. The sealing rings in the sealing grooves at the edges of the electrode layers effectively prevent electrolyte leakage, avoid equipment failure or efficiency reduction caused by liquid leakage, and improve the safety and sealing performance of the device.

[0032] Both the hydrogen guiding chamber 19 and the oxygen guiding chamber 20 are equipped with guide plates 21, which are inclined. The hydrogen guiding chamber 19 and the oxygen guiding chamber 20 independently collect the hydrogen and oxygen generated by electrolysis, respectively, to achieve effective gas separation and avoid the risk of gas mixing. The inclined guide plates 21 inside the guiding chamber guide the gas to rise in an orderly manner, prevent the gas from stagnating in the chamber and forming gas resistance, and ensure that the gas is smoothly discharged to the corresponding outlet, thereby improving the gas collection efficiency and the stability of the device operation.

[0033] The working principle of this embodiment is as follows: The electrolyte enters the main circulation channel 6 from the electrolyte injection port 4 on the right side of the outer shell 1. Driven by the water pump 7, it flows along the U-shaped main circulation channel 6 and is transported through the branch pipe 8 to the lower left electrolysis-energy storage unit 10, the lower right electrolysis-energy storage unit 11, and the upper electrolysis-energy storage unit 12, which are arranged in a triangular pattern inside the middle layer of the outer shell 1. After entering the unit, an electrolytic reaction occurs between the first composite electrode layer 14 and the second composite electrode layer 16. The first composite electrode layer 14 acts as the cathode to produce hydrogen, and the second composite electrode layer 16 acts as the anode to produce oxygen. At the same time, the first composite electrode layer... The first current collector 13 and the second current collector 17 together form a capacitor structure for energy storage. Solder joints are provided between each layer to ensure electrical connection. Sealing rings are installed in the edge sealing groove to prevent leakage. The generated hydrogen and oxygen enter the hydrogen guiding cavity 19 and oxygen guiding cavity 20 on the left and right sides of the unit, respectively. The inclined guide plate 21 in the cavity guides the gas to rise and finally exits from the hydrogen outlet 2 and oxygen outlet 3 at the top of the shell 1 through the conical joint 22. In addition, the L-shaped copper sheet 18 is connected in series with each unit circuit to ensure current stability. The electrolyte after reaction can be discharged from the drain port 5 on the left side of the shell 1 or continue to circulate.

[0034] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An electrolysis water hydrogen production-energy storage integrated capacitor device, characterized by: The device includes an outer shell (1), three sets of electrolysis-energy storage units, a main circulation channel (6), a gas guide cavity, and a gas outlet. The outer shell (1) is hollow inside. The three sets of electrolysis-energy storage units are arranged in a triangular shape in the middle layer of the outer shell (1). The three sets of electrolysis-energy storage units include a lower left electrolysis-energy storage unit (10), a lower right electrolysis-energy storage unit (11), and an upper electrolysis-energy storage unit (12). The main circulation channel (6) is located in the bottom layer of the outer shell (1), is distributed in a U-shape, and is connected to each electrolysis-energy storage unit through a branch pipe (8). The gas guide cavity includes a hydrogen guide cavity (19) and an oxygen guide cavity (20), which are located on the left and right sides of the electrolysis-energy storage unit, respectively. The gas outlet includes a hydrogen outlet (2) and an oxygen outlet (3), which are located at the top of the outer shell (1) and are connected to the corresponding gas guide cavity through a conical connector (22). 2.The water electrolysis hydrogen production and energy storage integrated capacitor device according to claim 1, characterized in that: It also includes an L-shaped copper sheet (18), which is used to realize the circuit series connection between the lower left electrolysis-energy storage unit (10), the lower right electrolysis-energy storage unit (11) and the upper electrolysis-energy storage unit (12). 3.The water electrolysis hydrogen production and energy storage integrated capacitor device according to claim 1, characterized in that: The right side of the outer shell (1) is provided with an electrolyte injection port (4), and the left side of the outer shell (1) is provided with a drain port (5). The electrolyte injection port (4) and the drain port (5) are respectively connected to the two ends of the main circulation channel (6). A water pump (7) is connected in series on the main circulation channel (6).

4. The integrated electrolysis hydrogen production-energy storage capacitor device according to claim 1, characterized in that: The electrolysis-energy storage unit has positioning posts (9) at the four corners of its bottom. Each electrolysis-energy storage unit includes a first current collector (13), a first composite electrode layer (14), a composite membrane layer (15), a second composite electrode layer (16), and a second current collector (17) stacked from bottom to top. Each set of first current collectors (13) has positioning holes at the four corners that cooperate with the positioning posts (9).

5. The integrated electrolysis hydrogen production-energy storage capacitor device according to claim 4, characterized in that: Solder joints are provided between the first composite electrode layer (14) and the first current collector (13), and between the second composite electrode layer (16) and the second current collector (17). Sealing grooves are provided at the edges of the first composite electrode layer (14) and the second composite electrode layer (16), and sealing rings are installed in the sealing grooves.

6. The integrated electrolytic water hydrogen production-energy storage capacitor device according to claim 1, characterized in that: Both the hydrogen flow chamber (19) and the oxygen flow chamber (20) are provided with flow guide plates (21), which are inclined.

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