Electrolytic cell body etching method for hydrogen energy station

Abstract

The application discloses an electrolytic cell body etching forming method of a hydrogen energy station, the electrolytic cell body comprising two oppositely sealed plate structures, any plate structure comprising a pipeline strip groove, a convex point part and a concave point part, and a double-sided etching pattern transfer design being performed according to the pipeline strip groove, the convex point part and the concave point part; a plurality of progressive horizontal etching line controls are performed according to the etching pattern transfer design, and a plurality of progressive etching forming is performed according to the horizontal etching line controls, so as to obtain a three-dimensional plate structure. The combination design of the pipeline strip groove, the convex point part and the concave point part makes the sealing structure of the electrolytic cell body more compact, the built-in pipeline is stable and reliable, the progressive horizontal etching forming makes the plate structure form a three-dimensional structure with uniform thickness, and the electrolysis efficiency is greatly improved. Through the combination of the positive and negative etching and the horizontal etching line, the accurate etching bite control requirement is met, the product forming precision is very reliable and stable, and the sealing and assembling quality is guaranteed.

Description

Technical Field

[0001] This invention relates to a method for etching and forming electrolytic cells in hydrogen energy stations, and belongs to the technical field of electrolytic cell forming. Background Technology

[0002] An electrolytic cell consists of a cell body, an anode, and a cathode, with most separating the anode and cathode chambers by a diaphragm. Based on the electrolyte, they are classified into three types: aqueous solution electrolytic cells, molten salt electrolytic cells, and non-aqueous solution electrolytic cells. When direct current passes through the electrolytic cell, an oxidation reaction occurs at the anode-solution interface, and a reduction reaction occurs at the cathode-solution interface, to produce the desired product. Optimizing the electrolytic cell structure and rationally selecting electrode and diaphragm materials are key to improving current efficiency, reducing cell voltage, and saving energy.

[0003] Electrolytic cells typically use a tank body to house the anode and cathode. To prevent the mixing of products from the anode and cathode and avoid potential harmful reactions, a diaphragm is generally used to separate the anode and cathode chambers in an electrolytic cell. The diaphragm needs a certain porosity to allow ions to pass through while preventing molecules or bubbles from passing through. When current flows through the diaphragm, the ohmic voltage drop of the diaphragm must be low. These performance requirements must remain largely unchanged during use, and the diaphragm must possess good chemical stability and mechanical strength under the influence of the electrolyte in both the anode and cathode chambers. When electrolyzing water, the electrolyte in both chambers is the same. The diaphragm in the electrolytic cell only needs to separate the anode and cathode chambers to ensure the purity of hydrogen and oxygen and prevent an explosion caused by the mixing of hydrogen and oxygen.

[0004] Currently, the electrolyzers in hydrogen energy stations use a plate structure, which effectively controls the thickness. The plates are spaced apart, ensuring gas production efficiency within a limited space, resulting in a very compact structure. These plate structures are mainly divided into two types: one uses diaphragms to isolate and combine the plate structures, and the other uses a combined enclosed arrangement of two plate structures.

[0005] In traditional plate-and-plate sealing structures, a combination of plates and copper conduits is used. The copper conduits are located between two sealed plate structures. These plate structures are generally formed by stamping and drilling, making it difficult to guarantee product precision. The internal copper conduits have very poor stability, and the sealing precision of the protrusions and grooves is also poor. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art and to propose an etching method for the electrolytic cell of a hydrogen energy station, which addresses the problem that poor molding precision of traditional sealed plate structures affects assembly precision and thickness.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A method for etching and forming the electrolytic cell of a hydrogen energy station, wherein the electrolytic cell comprises two relatively sealed and mating plate structures, each plate structure comprising a central pipe groove area and an outer peripheral concave-convex hole groove area surrounding the central pipe groove area, the central pipe groove area comprising a plurality of parallel and spaced pipe grooves, and the outer peripheral concave-convex hole groove area comprising a plurality of linear hole groove bands, the linear hole groove bands comprising sequentially spaced protrusions and concaves.

[0009] The electrolytic cell etching and forming method includes the following steps:

[0010] The double-sided etching pattern transfer design is based on the pipe groove, protrusion, and concave parts;

[0011] Several progressive horizontal etching line controls are implemented for the etching pattern transfer design, and several progressive etching moldings are performed according to the horizontal etching line controls to obtain the three-dimensional plate structure.

[0012] The two plate structures are joined together by one-to-one abutment of the protrusions, and then the two plate structures are laser welded together.

[0013] Preferably, the plate structure includes a sealing side and a back side.

[0014] The pipe groove includes a groove engraved portion on the sealing side and a groove engraved portion on the back side; the convex portion includes a convex engraved portion on the sealing side and a convex engraved portion on the back side; and the concave portion includes a concave engraved portion on the sealing side and a concave engraved portion on the back side.

[0015] The etched pattern transfer on the sealed side includes the groove engraving portion, the raised dot engraving portion, and the concave dot engraving portion; the etched pattern transfer on the back side includes the groove raised dot engraving portion, the raised dot engraving portion, and the concave dot engraving portion.

[0016] Preferably, the progressive horizontal etching line control includes at least three levels of horizontal etching lines.

[0017] Preferably, the plate structure is provided with a plurality of hollow grooves, and the hollow grooves are machined after the plate structure is formed.

[0018] Preferably, the outer periphery of the hollowed-out groove is provided with the linear perforated groove band.

[0019] Preferably, the outer surface of the plate structure has a sputtered titanium layer.

[0020] The beneficial effects of this invention are mainly reflected in:

[0021] 1. The combination design of pipe grooves, protrusions and concaves makes the electrolytic cell body sealing structure more compact, the built-in pipe is stable and reliable, and the progressive horizontal etching molding makes the plate structure form a three-dimensional structure with uniform thickness, which greatly improves the electrolysis efficiency.

[0022] 2. By combining the interrelation of yin and yang etching with horizontal etching lines, the requirements for precise control of etching amount are met, the product forming accuracy is very reliable and stable, and the quality of sealing and assembly is guaranteed. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the etch pattern transfer design in the etching forming method of the electrolytic cell of the hydrogen energy station of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure controlled by several progressive horizontal etching lines in the etching and forming method of the electrolytic cell of the hydrogen energy station of the present invention.

[0026] Figure 3 This is a partial structural diagram of the plate structure formed by the etching and molding method of the electrolytic cell of the hydrogen energy station of the present invention.

[0027] Figure 4 This is a schematic diagram of the structure of the electrolytic cell formed by the etching and forming method of the hydrogen energy station of the present invention.

[0028] Figure 5 This is a schematic diagram of the plate structure formed by the etching and molding method of the electrolytic cell of the hydrogen energy station of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0031] This invention provides a method for etching and forming the electrolyzer body of a hydrogen energy station, such as... Figures 1 to 5 As shown, the electrolytic cell 1 includes two relatively sealed and connected plate structures 2. Each plate structure 2 includes a central pipe groove area 3 and an outer peripheral concave-convex hole groove area 4 surrounding the central pipe groove area 3. The central pipe groove area includes several parallel and spaced pipe strip grooves 30, and the outer peripheral concave-convex hole groove area includes several linear hole groove bands 40. The linear hole groove bands include convex parts 41 and concave parts 42 that are distributed sequentially at intervals.

[0032] Specifically, traditional electrolytic cells have internal tubular gas channels, including copper, aluminum, and stainless steel. Generally, sealed electrolytic cells use a gap-fitting method, resulting in poor stability of the tubular gas channels inside, which affects the thickness of the sealed electrolytic cell. In addition, traditional electrolytic cells are formed by stamping or etching. Stamping has lower costs, but the forming structure precision is uncontrollable. Etching has higher precision, but it generally uses a groove forming method to distribute a large number of cell cavities. The cell cavity forming is simple, the plate structure 2 has poor uniformity, and the electrolytic stability is insufficient.

[0033] In response to this situation, this case proposes an electrolytic cell etching and forming method including the following steps:

[0034] like Figure 1 As shown, the double-sided etching pattern transfer design is carried out based on the pipe groove, protrusion, and concave part; when designing the etching pattern transfer, it is required that the thickness of the plate structure 2 is relatively uniform after forming.

[0035] That is, by matching the male and female grooves on both sides, the forming distribution and positive and negative matching requirements of the pipe groove 30, the protrusion 41, and the concave part 42 are met.

[0036] like Figure 2 As shown, several progressive horizontal etching lines are controlled for the etched pattern transfer design, and several progressive etching processes are performed according to the horizontal etching line control to obtain the three-dimensional plate structure.

[0037] Specifically, by using a progressive etching process, progressive etching can be achieved on both sides, resulting in a shaped plate structure that resembles... Figure 3 The three-dimensional molding structure shown.

[0038] like Figure 4 As shown, the two plate structures are joined together by one-to-one abutment of the protrusions, and then the two plate structures are laser welded together.

[0039] The one-to-one contact of the protrusions can achieve the required stable gap spacing and form the required internal airflow space. At the same time, during the alignment and fitting, it meets the requirements for the clamping and locking stability of the pipe. After sealing, the electrolytic cell body has a compact, ultra-thin and stable structure, and the laser welding sealing connection has reliable and stable strength.

[0040] In one specific embodiment, such as Figure 1 As shown, the plate structure 2 includes a sealing side 21 and a back side 22.

[0041] The pipe groove includes a groove engraved portion on the sealing side and a groove engraved portion on the back side; the convex part includes a convex engraved portion on the sealing side and a convex engraved portion on the back side; and the concave part includes a concave engraved portion on the sealing side and a concave engraved portion on the back side.

[0042] The etched pattern transfer on the sealing side includes groove engraving, raised dot engraving, and concave dot engraving, while the etched pattern transfer on the back side includes groove engraving, raised dot engraving, and concave dot engraving.

[0043] By rationally designing the distribution of groove engravings, raised dot engravings, concave engravings, groove engravings, raised dot engravings, and concave dot engravings, the precision requirements of layer-by-layer horizontal etching are met, forming a reliable and stable three-dimensional substrate.

[0044] In one specific embodiment, the progressive horizontal etching line control includes at least three levels of etched horizontal lines.

[0045] Of course, the more numerous the etched horizontal lines, the more precise the forming accuracy, making the transition steps form a kind of arc-shaped transition, meeting the stability and reliability requirements of the pipe installation, and at the same time generating a larger gas area.

[0046] In one specific embodiment, the plate structure 2 is provided with a plurality of hollow grooves 20, and the hollow grooves are machined after the plate structure is formed.

[0047] This means that etching is performed first, followed by the shaping of the hollow groove. This ensures that the etching accuracy is more reliable and stable when the plate structure is stable.

[0048] Of course, this embodiment can be optimized. When performing progressive horizontal etching, etching of the outer contour of the hollow groove can be added simultaneously. When etching on both sides, the outer contour is formed through, which can meet the material removal requirements inside the hollow groove.

[0049] In one specific embodiment, the outer periphery of the hollow groove 20 is provided with a linear hole groove band to meet the requirements of the outer periphery protrusion alignment support and air groove distribution.

[0050] In one specific embodiment, the outer surface of the plate structure 2 is provided with a sputtered titanium layer, which is the prior art and will not be described in detail here.

[0051] As described above, the etching method for the electrolyzer in a hydrogen energy station employs a combination of pipe grooves, raised sections, and recessed sections. This results in a more compact encapsulated structure, stable and reliable internal piping, and progressive horizontal etching that creates a uniformly thick three-dimensional structure, significantly improving electrolysis efficiency. The interrelation of anodizing and lithography with horizontal etching lines ensures precise control of the etching depth, resulting in highly reliable and stable product forming accuracy and guaranteed assembly quality.

[0052] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0053] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method for etching and forming an electrolytic cell for a hydrogen energy station, wherein the electrolytic cell comprises two relatively sealed and connected plate structures, each plate structure comprising a central pipe groove area and an outer peripheral concave-convex hole groove area surrounding the central pipe groove area, the central pipe groove area comprising a plurality of parallel and spaced pipe grooves, and the outer peripheral concave-convex hole groove area comprising a plurality of linear hole groove bands, the linear hole groove bands comprising sequentially spaced protrusions and concaves. Its features The electrolytic cell etching and forming method includes the following steps: The double-sided etching pattern transfer design is based on the pipe groove, protrusion, and concave parts; Several progressive horizontal etching line controls are implemented for the etching pattern transfer design, and several progressive etching moldings are performed according to the horizontal etching line controls to obtain the three-dimensional plate structure. The two plate structures are joined together by one-to-one abutment of the protrusions to achieve a stable gap, and then the two plate structures are laser welded together.

2. The etching and forming method for the electrolytic cell of the hydrogen energy station according to claim 1, characterized in that: The plate structure includes a sealing side and a back side. The pipe groove includes a groove engraved portion on the sealing side and a groove engraved portion on the back side; the convex portion includes a convex engraved portion on the sealing side and a convex engraved portion on the back side; and the concave portion includes a concave engraved portion on the sealing side and a concave engraved portion on the back side. The etched pattern transfer on the sealed side includes the groove engraving portion, the raised dot engraving portion, and the concave dot engraving portion; the etched pattern transfer on the back side includes the groove raised dot engraving portion, the raised dot engraving portion, and the concave dot engraving portion.

3. The etching and forming method for the electrolytic cell of the hydrogen energy station according to claim 1, characterized in that: The progressive horizontal etching line control includes at least three levels of horizontal etching lines.

4. The etching and forming method for the electrolytic cell of the hydrogen energy station according to claim 1, characterized in that: The plate structure has several hollowed-out grooves, which are machined after the plate structure is formed.

5. The etching and forming method for the electrolytic cell of the hydrogen energy station according to claim 4, characterized in that: The outer periphery of the hollowed-out groove is provided with the linear perforated groove band.

6. The etching and forming method for the electrolytic cell of the hydrogen energy station according to any one of claims 1 to 5, characterized in that: The outer surface of the plate structure has a sputtered titanium layer.

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