A formation electrode isolation plate for improving the uniformity of an oxide film of an electrode foil

Abstract

This invention discloses a formation electrode separator plate for improving the uniformity of oxide films on electrode foils, relating to the field of anodizing technology. The formation electrode separator plate includes a main support plate, multiple conductive partition modules, a current balancing unit, an elastic conductive contact layer, a layered composite liquid channel, and an adjustable clamping mechanism. The design of the conductive partition modules and the current balancing unit achieves uniform current density distribution; the elastic conductive layer effectively reduces contact resistance and accommodates the thermal expansion of the electrode foil; the layered composite liquid channel controls liquid distribution and improves film uniformity; the clamping mechanism provides adjustable clamping force on the electrode foil, ensuring stable adhesion during the formation process. This structure significantly improves the yield and reliability of anodizing while enhancing the uniformity, density, and stability of the oxide film, making it suitable for the preparation of high-performance electrode foils for solid aluminum electrolytic capacitors. It solves the problems of poor film uniformity, significant thermal deformation impact, and uneven electrolyte distribution in existing formation processes.

Description

Technical Field

[0001] This invention relates to the field of anodizing technology, and in particular to a formation electrode separator plate for improving the uniformity of the oxide film on electrode foil. Background Technology

[0002] Solid aluminum electrolytic capacitors, as high-performance electronic components, are widely used in consumer electronics, industrial control, and communication equipment. Their performance stability and lifespan are highly dependent on the quality of the oxide film on the internal anode electrode foil. The electrode foil typically uses aluminum foil as the substrate, and an oxide film layer with a high dielectric constant is formed on its surface through anodizing to achieve the required energy storage function and dielectric properties.

[0003] Currently, the core processes for preparing aluminum electrode foil include two main steps: etching and anodizing. Etching is mainly used to increase the surface area of ​​the aluminum foil to improve its specific capacitance, while the anodizing step determines the dielectric properties and uniformity of the oxide film. Current research mainly focuses on two directions: (1) high specific capacitance and high strength etching technology; (2) high extraction, high consistency and high reliability anodizing technology. In particular, for the anodizing of low-pressure etched foil, while forming an oxide film with a high dielectric constant, it is also necessary to ensure the integrity of the physical structure, the uniformity of the surface and the excellent mechanical properties of the oxide film, which places higher demands on the formation equipment and processes.

[0004] Existing formation processes generally use aluminum conductive rollers as the current carrier. After the electrode foil is energized by the conductive roller, it undergoes anodizing in the formation solution. However, due to the limited conductivity of aluminum itself, there is a high contact resistance between the conductive roller and the aluminum foil, which can easily cause excessive local temperature rise. This leads to uneven thermal shrinkage of the etched foil during the formation process. Such thermal deformation problems not only reduce the uniformity and density of the oxide film, but may also induce film cracking or decreased adhesion, thereby affecting the dielectric properties of the electrode foil and product yield.

[0005] Furthermore, most of the current mainstream electrode isolation structures are fixed metal supports or spacers, which fail to effectively optimize the current distribution path and fluid dynamic environment. If the aluminum foil is unevenly charged during the formation process, local film thickness deviations or dielectric property fluctuations are likely to occur, thereby reducing the consistency, reliability and service life of the entire batch of electrode foils. Especially when running in high-conductivity electrolytes, the problems of limited power transfer efficiency and difficulty in controlling the film growth process are particularly prominent.

[0006] There is an urgent need to develop a new type of chemically formed electrode separator with optimized structure, uniform conductivity, and stable film formation, in order to improve the consistency, reliability, and product quality of oxide films.

[0007] In summary, the existing technology has at least the following technical problems:

[0008] Existing electrode isolation structures have technical problems such as difficulty in balancing the shrinkage uniformity of foil during formation and failure to effectively guide the distribution of current and liquid flow, which affect the uniformity and density of oxide film layers, thus restricting film formation consistency and overall process yield. Summary of the Invention

[0009] The purpose of this invention is to provide a formation electrode isolation plate that improves the uniformity of the oxide film on the electrode foil, in order to solve the technical problems of existing formation electrode isolation structures, which have difficulty in balancing the shrinkage uniformity of the foil during formation and fail to effectively guide the current and liquid flow distribution, thus affecting the uniformity and density of the oxide film layer and restricting the film formation consistency and overall process yield.

[0010] The preferred technical solutions among the many technical solutions provided by this invention can produce a variety of technical effects, which are described in detail below.

[0011] To address the aforementioned technical problems, the present invention provides the following technical solution:

[0012] This invention provides a formation electrode isolation plate for improving the uniformity of the oxide film on an electrode foil. The plate includes a main support plate for supporting the electrode foil to be formed and connected to a formation apparatus; multiple conductive partition modules arranged along the length of the main support plate and respectively contacting multiple regions of the electrode foil; a current balancing unit is provided between each conductive partition module to balance the current density in different regions; and an elastic conductive contact layer covering the surface of the conductive partition modules, made of a material with high conductivity and flexibility to reduce contact resistance and adapt to the aluminum foil. Thermal deformation; and a layered composite liquid channel disposed within the main support plate, wherein one end of the layered composite liquid channel is used to introduce a forming liquid, and the other end is used to allow the forming liquid to exit so that the electrode foil contacts the forming liquid surface; and an adjustable clamping mechanism, which is arranged opposite to the main support plate in the vertical direction and located above the main support plate, and clamps the electrode foil with the main support plate; in the length direction of the electrode foil, the adjustable clamping mechanism is arranged at intervals with the conductive rollers of the forming device to provide zoned adjustable clamping pressure between the electrode foil and the elastic conductive contact layer.

[0013] In one embodiment, the current balancing unit includes a current-limiting resistor or inductor connected in parallel between adjacent conductive partition modules for adjusting regional current differences.

[0014] In one embodiment, the elastic conductive contact layer is silver-plated silicone rubber, carbon fiber elastic conductor, or multilayer composite metal elastomer material.

[0015] In one embodiment, the layered composite liquid channel includes a main channel layer for conveying the formation liquid along the length of the electrode foil; a micro-conducting auxiliary layer stacked vertically from bottom to top between the main channel layer and the electrode foil in a comb-shaped flow channel; an array of microporous channels is provided on the comb-shaped flow channel; and a variable flow resistance structure for setting the depth of the comb-shaped flow channel according to the different lateral regions of the electrode foil in the comb-shaped flow channel, so as to adjust the local liquid flow rate and liquid resistance and improve the film uniformity.

[0016] In one embodiment, the main channel layer consists of multiple main flow channels arranged parallel to each other along the length of the electrode foil. The comb-shaped diversion channels are arranged laterally in the main flow channels and extend along the length of the main flow channels and communicate with the main flow channels. The formation liquid enters from the main flow channels and flows through the comb-shaped diversion channels and the arrayed microporous channels in sequence toward the electrode foil and contacts the electrode foil.

[0017] In one embodiment, the comb-shaped flow divider faces the main flow channel, and the plane of the comb-shaped flow divider faces the electrode foil. The variable flow resistance structure sets the depth of the multiple horizontally arranged sub-channels of the comb-shaped flow divider to be deep in the middle and shallow on both sides. The aperture of the array of micropore channels located in the sub-channels is set to be large in the middle of the sub-channels and small in the aperture of the two side channels. This is used to balance the lateral liquid resistance of the forming liquid in contact with the electrode foil, so that the flow rate of the forming liquid in the lateral direction is balanced, and the thickness distribution uniformity of the electrode foil forming film layer in the lateral direction is improved.

[0018] In one embodiment, the adjustable clamping mechanism includes an airbag clamping unit, a pressure regulating unit, and a pressure distance adjusting unit. The airbag pressure of the airbag clamping unit is adjustable. The airbag is connected to the telescopic end of the pressure distance adjusting unit, and a pressure sensor of the pressure regulating unit is disposed between the airbag and the telescopic end of the pressure distance adjusting unit. The pressure distance adjusting unit drives the airbag to move toward the electrode foil and presses the electrode foil onto the elastic conductive contact layer, thereby adjusting the vertical distance of the airbag pressing toward the electrode foil, the pressure of the airbag pressing the electrode foil, and the contact area between the airbag and the electrode foil. The airbag clamping unit adjusts the airbag pressure to adjust the contact area between the airbag and the electrode foil. The contact area; the pressure sensor is used to sense the pressure applied to the airbag by the telescopic end of the pressure adjustment unit, and transmits the pressure data to the pressure control unit; the pressure control unit is connected to the central control unit of the formation device, and is used to receive instructions to apply pressure to the electrode foil; the pressure control unit is electrically connected to the airbag pressing unit and the pressure adjustment unit; the pressure control unit converts the data returned by the pressure sensor and the air pressure data returned by the airbag pressing unit into a pressure value applied by the airbag to the electrode foil through calculation, and controls the airbag pressing unit and the pressure adjustment unit according to the calculated pressure value to adjust the pressure applied by the airbag to the electrode foil.

[0019] In one embodiment, temperature sensors are provided in several contact areas between the conductive partition module and the elastic conductive contact layer to monitor the operating temperature rise of the corresponding areas in real time.

[0020] In one embodiment, the temperature sensor is connected to the central control unit of the formation apparatus. The central control unit adjusts the power supply current of each conductive partition module according to the operating temperature rise signal fed back by the temperature sensor in each region to achieve dynamic control of the operating temperature rise of the elastic conductive contact layer and the electrode foil.

[0021] Compared with the prior art, the formation electrode separator plate provided by the present invention for improving the uniformity of the oxide film on the electrode foil has the following beneficial effects:

[0022] (1) Improve current uniformity: By setting multiple conductive partition modules in the main support plate and introducing current balancing units between them, the current density of different areas of multiple conductive partition modules can be effectively distributed and balanced, avoiding film ablation or incomplete oxidation caused by excessive local current, and significantly improving the consistency of oxide film.

[0023] (2) Reduce contact impedance and thermal deformation stress: The elastic conductive contact layer uses a flexible material with high conductivity (such as silver-coated carbon rubber or graphite-based conductive elastomer), which not only effectively reduces the contact impedance between the electrode foil and the conductive partition module, but also has a buffering effect, which can adapt to the micro-thermal expansion and contraction of the aluminum foil due to heating or electrolytic reaction, and ensure the mechanical stability of the film formation process.

[0024] (3) Achieving balanced liquid flow and improving the stability of oxidation film formation: The layered composite liquid channel structure can guide the formation liquid to the surface of the formation area of ​​the electrode foil in an orderly manner, and balance the flow of formation liquid in each area through the layered composite liquid channel, making the oxidation reaction more stable and uniform, which helps to form a dense, uniform high dielectric constant oxide film.

[0025] (4) Improve film adhesion and morphology quality: The adjustable clamping mechanism can apply moderate and regionally controllable pressure to the back of the electrode foil, ensuring that the electrode foil and the elastic conductive contact layer are fully bonded, thereby stabilizing the current path and reducing physical defects such as wrinkling and cracking of the film caused by stress fluctuations during the film adhesion process.

[0026] (5) Improve product consistency and manufacturing yield: Through the synergistic effect of the multi-layer structure of the electrode isolation plate, the uniformity of oxide film morphology, electrical performance stability and physical reliability of the electrode foil are significantly improved, the scrap rate during the formation process is reduced, thereby improving the overall manufacturing yield and narrowing the gap between domestic formation technology and international advanced level.

[0027] In summary, this invention systematically optimizes multiple dimensions such as conductivity control, current control, liquid distribution, mechanical bonding, and thermal response, breaking through the bottleneck of existing isolation plate technology that cannot simultaneously achieve conductivity uniformity and film formation stability, and providing key equipment support for high specific capacity and high consistency anodizing processes. Attached Figure Description

[0028] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a side view of the electrode isolation plate of the present invention;

[0030] Figure 2 This is a side view of a partially enlarged cross-sectional structural diagram of the main through channel and the comb-shaped diversion channel of the present invention.

[0031] Figure 3 This is a top view schematic diagram of the main through channel and comb-shaped diversion channel of the present invention;

[0032] Figure 4 This is a top view schematic diagram of the elastic conductive contact layer, conductive partition module, current equalization unit, and comb-shaped current diversion groove of the present invention.

[0033] The reference numerals in the attached figures are as follows:

[0034] 1. Main support plate;

[0035] 2. Conductive partition module; 21. Temperature sensor;

[0036] 3. Current balancing unit;

[0037] 4. Elastic conductive contact layer;

[0038] 5. Layered composite liquid channel; 51. Main channel layer; 511. Main flow channel; 52. Micro-conducting auxiliary layer; 521. Comb-shaped diversion channel; 522. Diversion channel; 523. Arrayed microporous channel;

[0039] 6. Adjustable clamping mechanism; 61. Airbag clamping unit; 611. Airbag; 62. Pressure control unit; 621. Pressure sensor; 63. Pressure distance adjustment unit; 631. Telescopic end;

[0040] 7. Conductive roller;

[0041] 8. Electrode foil;

[0042] 9. Central control unit. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0044] A specific embodiment provides a formation electrode isolation plate for improving the uniformity of the oxide film on electrode foil. This plate includes a main support plate, multiple conductive partition modules, a current balancing unit, an elastic conductive contact layer, a layered composite liquid channel, and an adjustable clamping mechanism. The design of the conductive partition modules and the current balancing unit achieves uniform current density distribution. The elastic conductive layer effectively reduces contact resistance and accommodates the thermal expansion of the electrode foil. The layered composite liquid channel controls liquid distribution and improves film uniformity. The clamping mechanism provides adjustable clamping force on the electrode foil, ensuring stable adhesion during the formation process. This structure significantly improves the yield and reliability of anodic formation while enhancing the uniformity, density, and stability of the oxide film. It is suitable for preparing high-performance electrode foils for solid aluminum electrolytic capacitors. It effectively solves the technical problems of existing formation electrode isolation structures, such as difficulty in balancing the shrinkage uniformity of the foil during formation and failure to effectively guide current and liquid flow distribution, which affect the uniformity and density of the oxide film layer and restrict film uniformity and overall process yield.

[0045] The first embodiment of a chemical electrode separator that improves the uniformity of the oxide film on the electrode foil is, for example... Figures 1 to 4 As shown, it includes a main support plate 1 for supporting the electrode foil 8 to be formed and connected to the formation device; multiple conductive partition modules 2, arranged along the length of the main support plate 1, respectively contacting multiple areas of the electrode foil 8, and a current balancing unit 3 is provided between each conductive partition module 2, connecting each conductive partition module 2 through the current balancing unit 3 to balance the current density of different areas; and an elastic conductive contact layer 4, covering the surface of the conductive partition module 2, made of a material with high conductivity and flexibility, used to reduce contact resistance and adapt to the thermal deformation of the aluminum foil; and a... A layered composite liquid channel 5 is placed inside the main support plate 1, with one end of the layered composite liquid channel 5 introducing the formation liquid and the other end for the formation liquid to emerge so that the electrode foil 8 contacts the surface of the formation liquid; and an adjustable clamping mechanism 6, which is arranged opposite to the main support plate 1 in the vertical direction and is located on the main support plate 1, and clamps the electrode foil 8 with the main support plate 1; in the length direction of the electrode foil 8, the adjustable clamping mechanism 6 is arranged at intervals with the conductive roller 7 of the formation device to provide zoned adjustable clamping pressure between the electrode foil 8 and the elastic conductive contact layer 4.

[0046] Compared with the prior art, the formation electrode isolation plate provided by the present invention for improving the uniformity of the oxide film of electrode foil 8 has the following beneficial effects: improving current uniformity. By setting multiple conductive partition modules 2 in the main support plate 1 and introducing current equalization units 3 between them, the current density of different areas of multiple conductive partition modules 2 can be effectively distributed and balanced, avoiding film ablation or incomplete oxidation caused by excessive local current, and significantly improving the consistency of the oxide film.

[0047] To reduce contact resistance and thermal deformation stress, the elastic conductive contact layer 4 uses a highly conductive flexible material (such as silver-coated carbon rubber), which not only effectively reduces the contact resistance between the electrode foil 8 and the conductive partition module 2, but also has a buffering effect, which can adapt to the microscopic thermal expansion and contraction of the aluminum foil caused by heating or electrolytic reaction, and ensure the mechanical stability of the film formation process.

[0048] To achieve balanced liquid flow and improve the stability of oxidation film formation, the layered composite liquid channel 5 structure can guide the formation liquid to the surface of the formation area of ​​the electrode foil 8 in an orderly manner. The layered composite liquid channel 5 balances the flow of formation liquid in each area, making the oxidation reaction more stable and uniform, which helps to form a dense, uniform high dielectric constant oxide film.

[0049] To improve film adhesion and morphological quality, the adjustable clamping mechanism 6 can apply appropriate and regionally controllable pressure to the back of the electrode foil 8, ensuring that the electrode foil 8 and the elastic conductive contact layer 4 are fully bonded, thereby stabilizing the current path and reducing physical defects such as wrinkling and cracking of the film caused by stress fluctuations during film adhesion.

[0050] To improve product consistency and manufacturing yield, the multi-layer structure of the electrode separator plate significantly improves the uniformity of oxide film morphology, electrical performance stability and physical reliability of electrode foil 8, reduces the scrap rate during the formation process, thereby improving the overall manufacturing yield and narrowing the gap between domestic formation technology and international advanced level.

[0051] In summary, this invention systematically optimizes multiple dimensions such as conductivity control, current control, liquid distribution, mechanical bonding, and thermal response, breaking through the bottleneck of existing isolation plate technology that cannot simultaneously achieve conductivity uniformity and film formation stability, and providing key equipment support for high specific capacity and high consistency anodizing processes.

[0052] As one alternative implementation method:

[0053] Specifically, such as Figure 4 As shown, the current balancing unit 3 includes current limiting elements connected in parallel between adjacent conductive partition modules 2. The current limiting elements include current limiting resistors or inductors, which are used to adjust the current difference between the regions.

[0054] When applying it, Figure 4 The V-line in the diagram serves as the power supply bus to each conductive zone module 2, while the line connecting the power supply bus to the conductive zone module 2 is the electron supply line. Current-limiting elements (such as current-limiting resistors or inductors) are connected in parallel between adjacent conductive zone modules 2. The current input to each conductive zone module 2 is distributed by the central control unit 9. Fine-tuning compensation resistors / reactors are applied to different areas through the current-limiting elements to eliminate local over- or under-current phenomena caused by uneven conductivity. This helps to balance the current density in each area, avoiding excessive local thickness or ablation of the film layer due to excessive current concentration, thereby improving the problem of uneven lateral distribution of the oxide film.

[0055] In addition, adjustable resistor arrays or intelligent control chips can be used to achieve dynamic real-time current balancing of current limiting components.

[0056] The above describes the elastic conductive contact layer 4 as being made of silver-plated silicone rubber, carbon fiber elastic conductor, or multilayer composite metal elastomer material; the carbon fiber elastic conductor can also be an ultra-low density all-carbon elastic conductor.

[0057] In application, highly conductive flexible materials such as silver-plated silicone rubber and carbon fiber elastic conductors are laid on the surface of the conductive partition module 2 to form good contact with the electrode foil 8. During the thermal expansion and contraction of the aluminum electrode foil 8, the elastic conductive contact layer 4 automatically conforms to the electrode foil 8, which can effectively relieve the stress at the contact interface. It also helps to reduce local contact resistance, improve the overall current input uniformity, and avoid local heating and oxide film defects caused by poor contact.

[0058] Regarding the specific structure of the aforementioned layered composite liquid channel 5, as follows: Figures 1 to 3 As shown, the layered composite liquid channel 5 includes a main channel layer 51 for conveying the formation liquid along the length of the electrode foil 8; a micro-conducting auxiliary layer 52, which is stacked vertically from bottom to top between the main channel layer 51 and the electrode foil 8 in a comb-shaped diversion channel 521; an array of microporous channels 523 are provided on the comb-shaped diversion channel 521; and a variable flow resistance structure is used to set the depth of the comb-shaped diversion channel 521 according to the different transverse regions of the electrode foil 8 in the comb-shaped diversion channel 521, so as to adjust the local liquid flow rate and liquid resistance and improve the film uniformity.

[0059] During application, the formation solution is horizontally transported by the main channel layer 51, vertically guided by the comb-shaped diversion groove 521, and then uniformly seeped out in a point or surface shape through the array-type microporous channel 523. The uniformly distributed formation solution contacts the surface of the electrode foil 8. This channel structure can realize zoned liquid supply, pressure buffering and flow resistance control on the same electrode foil 8. It is beneficial to improve the lateral distribution uniformity of the formation solution on the surface of the electrode foil 8, thereby eliminating the technical problems of uneven film formation caused by liquid short circuit / dead angle / eddy current in traditional liquid supply structures.

[0060] In addition, the liquid flow direction and rate of the formation liquid can be controlled by setting up a pump control system and a flow rate sensor, and through feedback regulation, a closed-loop automatic regulation of the liquid supply of the formation liquid can be formed.

[0061] Regarding the specific structure of the aforementioned main channel layer 51, comb-shaped diversion groove 521, and arrayed microporous channel 523, as follows: Figures 1 to 4 As shown, the main channel layer 51 consists of multiple main flow channels 511 arranged in parallel along the length of the electrode foil 8. The comb-shaped diversion channel 521 is arranged laterally in the main flow channel 511 and extends along the length of the main flow channel 511 and communicates with the main flow channel 511. The formation liquid enters from the main flow channel 511 and flows through the comb-shaped diversion channel 521 and the arrayed microporous channel 523 in sequence to overflow towards the electrode foil 8 and contact the electrode foil 8.

[0062] Among them, the comb-shaped flow divider 521 has its comb teeth facing the main flow channel 511, and its plane facing the electrode foil 8. The variable flow resistance structure sets the depth of the multiple horizontally arranged sub-channels 522 of the comb-shaped flow divider 521 to be deep in the middle and shallow on both sides. The aperture of the array-type microporous channels 523 located in the sub-channels 522 is set to have a larger aperture in the middle of the sub-channels 522 and a smaller aperture on both sides. This is used to balance the lateral liquid resistance of the forming liquid in contact with the electrode foil 8, so that the flow rate of the forming liquid in the lateral direction is balanced and the thickness distribution uniformity of the forming film layer in the lateral direction of the electrode foil 8 is improved.

[0063] The zoned liquid supply can be achieved by installing multiple electrically controlled switches in or at the main flow channel 511 of the main channel layer 51. The electrically controlled switches are electrically connected to the central control unit 9 and are subject to the regulation of the central control unit 9. The opening and closing of a single main flow channel 511 or the opening and closing of a section of a single main flow channel 511 connected to the comb-shaped diversion channel 521 can be controlled individually to achieve zoned controllable liquid supply.

[0064] When applied, by pre-setting the pore size gradient and distribution density of the micropore channels (e.g., large in the middle and small on both sides) and the depth of the flow channel (e.g., deep in the middle and shallow at the edges), a controllable fluid resistance distribution is created, thereby guiding the lateral balance of the formation liquid flow rate; it can significantly improve the thickness uniformity of the lateral oxide film of the electrode foil 8 and solve the problem of local film layers being too thin or too thick caused by uneven liquid resistance.

[0065] In addition, MEMS micromachining technology can be used to manufacture channel structures in different regions to achieve higher precision control.

[0066] Regarding the specific structure of the aforementioned adjustable clamping mechanism 6, as follows: Figure 1As shown, the adjustable clamping mechanism 6 includes an airbag 611 clamping unit 61, a pressure regulating unit 62, and a pressure distance adjusting unit 63. The air pressure of the airbag 611 in the airbag 611 clamping unit 61 is adjustable. The airbag 611 is connected to the telescopic end 631 of the pressure distance adjusting unit 63, and the pressure sensor 621 of the pressure regulating unit 62 is disposed between the airbag 611 and the telescopic end 631 of the pressure distance adjusting unit 63. The pressure distance adjusting unit 63 drives the airbag 611 to move towards the electrode foil 8 and clamps the electrode foil 8 onto the elastic conductive contact layer 4, thereby adjusting the vertical distance of the airbag 611 pressing against the electrode foil 8, the pressure of the airbag 611 clamping the electrode foil 8, and the contact area between the airbag 611 and the electrode foil 8. The airbag 611 clamping unit 61 adjusts the air pressure of the airbag 611 to adjust the pressure between the airbag 611 and the electrode foil 8. The contact area of ​​the electrode foil 8; the pressure sensor 621 is used to sense the pressure applied to the airbag 611 by the telescopic end 631 of the pressure adjustment unit 63, and transmits the pressure data to the pressure control unit 62; the pressure control unit 62 is connected to the central control unit 9 of the formation device, and is used to receive the instruction to apply pressure to the electrode foil 8; the pressure control unit 62 is electrically connected to the airbag 611 pressing unit 61 and the pressure adjustment unit 63; the pressure control unit 62 converts the data returned by the pressure sensor 621 and the air pressure data returned by the airbag 611 pressing unit 61 into the pressure value applied to the electrode foil 8 by the airbag 611 through calculation, and adjusts the airbag 611 pressing unit 61 and the pressure adjustment unit 63 according to the calculated pressure value, so as to adjust the pressure applied to the electrode foil 8 by the airbag 611.

[0067] When in use, the central control unit 9 sends a pressure adjustment signal to the airbag 611 pressing unit 61, and the pressure distance adjustment unit 63 drives the airbag 611 to approach the aluminum foil and apply precise and controllable pressure.

[0068] Pressure sensor 621 monitors the pressure of the contact surface between airbag 611 and telescopic end 631 of pressure adjustment unit 63 in real time, and feeds the data back to central control unit 9. Through calculation, the pressure data between airbag 611 and electrode foil 8 is indirectly obtained, and the clamping force is adjusted by central control unit 9. This structure and pressure control help ensure the contact force is balanced in different areas, reduce the interference of aluminum foil deformation on the film formation process, and solve the problems of uneven clamping or mechanical deformation of electrode foil 8 causing local contact failure between electrode foil 8 and formation liquid, as well as indentation caused by electrode foil 8 not being clamped open.

[0069] Furthermore, the airbag 611 can be partitioned, and a multi-channel airbag 611 partition structure can be added to achieve differential adjustment of the surface pressure of the contact surface between the airbag 611 and the electrode foil 8.

[0070] A second embodiment of a formation electrode separator that improves the uniformity of the oxide film on the electrode foil, for example... Figure 1As shown, the difference between this embodiment and the first embodiment is that, regarding the working temperature monitoring structure between the conductive partition module 2 and the elastic conductive contact layer 4, temperature sensors 21 are set in several contact areas between the conductive partition module 2 and the elastic conductive contact layer 4 to monitor the working temperature rise of the corresponding areas in real time.

[0071] Specifically, the temperature sensor 21 is connected to the central control unit 9 of the formation device. The central control unit 9 adjusts the power supply current of each conductive zone module 2 according to the working temperature rise signal fed back by the temperature sensor 21 in each area to achieve dynamic control of the working temperature rise of the elastic conductive contact layer 4 and the electrode foil 8, so as to reduce the effect of temperature on the shrinkage of the electrode foil 8.

[0072] During application, a temperature sensor 21 is installed between the contact interface of the elastic conductive contact layer 4 and the conductive partition module 2 to collect working temperature data of different areas in real time. The central control unit 9 automatically adjusts the current output of the corresponding conductive partition module 2 according to the feedback signal to reduce local temperature rise, suppress uneven thermal expansion, realize dynamic control of the surface temperature distribution of the electrode foil 8, and ensure the stable growth of the oxide film. This reduces problems such as foil shrinkage, film cracking, or abnormal electrochemical performance caused by high temperature.

[0073] Furthermore, it can be combined with an AI temperature control model to collect real-time working temperature data, predict and optimize temperature regulation logic, and precisely control the temperature of each area through the central control unit 9, thereby further improving the oxidation layer formation stability of the electrode foil 8.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described.

Claims

1. A formation electrode separator for improving the uniformity of the oxide film on electrode foil, characterized in that, It includes a main support plate for supporting the electrode foil to be formed and connecting it to the forming device; And multiple conductive partition modules are arranged along the length direction of the main support plate, respectively contacting multiple areas of the electrode foil, and a current balancing unit is arranged between each conductive partition module, and the current balancing unit connects each conductive partition module to balance the current density of different areas. And an elastic conductive contact layer, covering the surface of the conductive partition module, is made of a material with high conductivity and flexibility, used to reduce contact resistance and adapt to the thermal deformation of aluminum foil; And a layered composite liquid channel is provided in the main support plate, wherein one end of the layered composite liquid channel is used to introduce the formation liquid, and the other end is used to allow the formation liquid to emerge so that the electrode foil contacts the formation liquid surface; And an adjustable clamping mechanism, which is arranged opposite to the main support plate in the vertical direction and located on the main support plate, and clamps the electrode foil with the main support plate; in the length direction of the electrode foil, the adjustable clamping mechanism is arranged at intervals with the conductive roller of the formation device to provide zoned adjustable clamping pressure between the electrode foil and the elastic conductive contact layer.

2. The formation electrode isolation plate according to claim 1, characterized in that, The current balancing unit includes current-limiting resistors or inductors connected in parallel between adjacent conductive partition modules, used to adjust the regional current differences.

3. The formation electrode isolation plate according to claim 1, characterized in that, The elastic conductive contact layer is made of silver-plated silicone rubber, carbon fiber elastic conductor, or multilayer composite metal elastomer material.

4. The formation electrode isolation plate according to claim 1, characterized in that, The layered composite liquid channel includes a main channel layer for conveying the formation liquid along the length of the electrode foil; And a micro-conducting auxiliary layer, which is stacked vertically from bottom to top between the main channel layer and the electrode foil in a comb-shaped diversion groove; an array of microporous channels are provided on the comb-shaped diversion groove; And a variable flow resistance structure, used to set the depth of the comb-shaped flow divider according to the different lateral regions of the electrode foil in the comb-shaped flow divider, so as to adjust the local liquid flow rate and liquid resistance and improve the film uniformity.

5. The formation electrode isolation plate according to claim 4, characterized in that, The main channel layer consists of multiple main flow channels arranged in parallel along the length of the electrode foil. The comb-shaped diversion channels are arranged laterally in the main flow channels, and the comb-shaped diversion channels extend along the length of the main flow channels and communicate with the main flow channels. The formation liquid enters from the main channel and flows sequentially through the comb-shaped diversion channel and the arrayed microporous channel toward the electrode foil, where it overflows and contacts the electrode foil.

6. The formation electrode isolation plate according to claim 5, characterized in that, The comb-shaped flow divider has its comb teeth facing the main flow channel, and its plane facing the electrode foil. The variable flow resistance structure sets the depth of the multiple horizontally arranged comb-shaped flow dividers to be deeper in the middle and shallower on both sides. The aperture of the array of micropore channels located in the dividers is set such that the aperture of the holes in the middle of the divider is larger and the aperture of the holes on both sides is smaller. This is used to balance the lateral liquid resistance of the forming liquid in contact with the electrode foil, so that the flow rate of the forming liquid in the lateral direction is balanced, and the thickness distribution uniformity of the electrode foil forming film layer in the lateral direction is improved.

7. The formation electrode isolation plate according to claim 1, characterized in that, The adjustable clamping mechanism includes an airbag clamping unit, a pressure control unit, and a pressure distance adjustment unit; The air pressure of the airbag compression unit is adjustable. The airbag is connected to the telescopic end of the pressure distance adjustment unit, and the pressure sensor of the pressure control unit is located between the airbag and the telescopic end of the pressure distance adjustment unit. The pressure adjustment unit drives the airbag to move toward the electrode foil and presses the electrode foil onto the elastic conductive contact layer, thereby adjusting the vertical distance of the airbag pressing toward the electrode foil, the pressure of the airbag pressing the electrode foil, and the contact area between the airbag and the electrode foil. The airbag pressing unit adjusts the airbag pressure to adjust the contact area between the airbag and the electrode foil; The pressure sensor is used to sense the pressure applied to the airbag by the telescopic end of the pressure adjustment unit and transmit the pressure data to the pressure control unit. The pressure control unit is connected to the central control unit of the formation device and is used to receive instructions to apply pressure to the electrode foil; the pressure control unit is electrically connected to the airbag pressing unit and the pressure distance adjustment unit. The pressure control unit converts the data returned by the pressure sensor and the air pressure data returned by the airbag pressing unit into a pressure value applied by the airbag to the electrode foil through calculation, and adjusts the airbag pressing unit and the pressure distance adjustment unit according to the calculated pressure value to adjust the pressure applied by the airbag to the electrode foil.

8. The formation electrode isolation plate according to claim 1, characterized in that, Temperature sensors are installed in several contact areas between the conductive partition module and the elastic conductive contact layer to monitor the operating temperature rise of the corresponding areas in real time.

9. The formation electrode isolation plate according to claim 8, characterized in that, The temperature sensor is connected to the central control unit of the formation device. The central control unit adjusts the power supply current of each conductive partition module according to the operating temperature rise signal fed back by the temperature sensor in each region to achieve dynamic control of the operating temperature rise of the elastic conductive contact layer and the electrode foil.

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