A high thickness low voltage aluminum foil anode foil

Abstract

The utility model relates to an anode foil technical field provides a kind of high thickness low pressure aluminum foil anode foil, including aluminum base layer, the inside of the aluminum base layer is provided with tunnel structure, the top of the aluminum base layer is fixed with protective structure, and the protective structure includes insulating layer, repair layer and connecting layer.The utility model is provided with protective structure, insulation layer can play the insulating effect, can store electric charge simultaneously, repair layer can protect insulating layer, fill the small defect and pinhole possibly existing in insulating layer, significantly reduce leakage current, and protection layer is covered on the surface of repair layer by connecting layer, can protect insulating layer and repair layer in routine storage process, avoid scratching repair layer and insulating layer, realize the device with the function of protecting aluminum base layer, improve the durability of the high thickness low pressure aluminum foil anode foil when using.

Description

Technical Field

[0001] This utility model relates to the field of anode foil technology, and in particular to a high-thickness, low-pressure aluminum foil anode foil. Background Technology

[0002] To achieve high capacitance at low voltage, a drastic electrochemical etching process is required to transform smooth aluminum foil into a "microscopic labyrinth" filled with micron-sized tunnels, maximizing its surface area. However, this intense etching process severely weakens the mechanical strength of the aluminum foil. If foil of conventional thickness is used, it becomes extremely brittle after etching, making subsequent capacitor manufacturing processes such as winding impossible. Therefore, a high-thickness, low-voltage aluminum foil anode foil needs to be designed.

[0003] Traditional high-thickness, low-pressure aluminum foil anode foil is prone to damage to its internal core components when its surface is scratched during use, making it inconvenient to preserve the product. Therefore, it is necessary to design a high-thickness, low-pressure aluminum foil anode foil. Utility Model Content

[0004] The purpose of this invention is to provide a high-thickness, low-pressure aluminum foil anode foil to solve the problem that when the surface of the existing high-thickness, low-pressure aluminum foil anode foil is scratched, the core components inside will be damaged, making it inconvenient to store the product.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-thickness, low-pressure aluminum foil anode foil, comprising an aluminum base layer;

[0006] The aluminum base layer has an internal tunnel structure;

[0007] A protective structure is fixed to the top of the aluminum base layer;

[0008] The protective structure includes an insulating layer, a repair layer, a connecting layer, and a protective layer. The insulating layer is fixed to the top of the aluminum base layer, the top of the insulating layer is fixed with a repair layer, the top of the repair layer is provided with a connecting layer, and the top of the connecting layer is fixed with a protective layer.

[0009] Furthermore, the tunnel structure includes a transverse tunnel, a longitudinal tunnel, and a vertical tunnel. The transverse tunnels are uniformly formed inside the aluminum base layer. A longitudinal tunnel is formed on one side of each transverse tunnel. A vertical tunnel is uniformly formed on one side of both the transverse and longitudinal tunnels.

[0010] Furthermore, the transverse tunnels, longitudinal tunnels, and vertical tunnels are all equally spaced within the aluminum substrate.

[0011] Furthermore, the transverse tunnels and longitudinal tunnels are distributed perpendicularly to each other, and the transverse tunnels, longitudinal tunnels and vertical tunnels constitute a three-dimensional mesh porous structure.

[0012] Furthermore, the insulating layer is an aluminum oxide thin film layer.

[0013] Furthermore, the repair layer is a phosphate layer.

[0014] Furthermore, the connecting layer is a pressure-sensitive layer, and the protective layer is a PVC layer.

[0015] The advantages of the high-thickness, low-pressure aluminum foil anode foil provided by this utility model are as follows:

[0016] By incorporating a protective structure, the insulating layer serves as an insulator and can store electrical charge. The repair layer protects the insulating layer, filling any minor defects and pinholes that may exist within it, significantly reducing leakage current. The protective layer, connected to the repair layer, covers the surface of the repair layer and protects both the insulating and repair layers during daily storage, preventing scratches. This device thus provides protection for the aluminum substrate and improves the durability of the high-thickness, low-pressure aluminum foil anode foil during use.

[0017] By incorporating a tunnel structure, the effective surface area of ​​the aluminum foil increases exponentially due to the three-dimensional network formed by transverse, longitudinal, and vertical tunnels. This massive increase in surface area directly leads to a significant improvement in the specific capacity of the anode foil. The interconnected network structure provides smooth channels for electrolyte penetration and rapid ion migration, enabling the device to easily increase the surface area of ​​the aluminum substrate and improving the working efficiency of the high-thickness, low-pressure aluminum foil anode foil during use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0020] Figure 3 This is a three-dimensional structural schematic diagram of the main cross-section of this utility model;

[0021] Figure 4 This is a side view cross-sectional three-dimensional structural schematic diagram of the present invention;

[0022] Figure 5 This is a top-view cross-sectional three-dimensional structural diagram of the present invention.

[0023] The following are the annotations in the figure: 1. Aluminum base layer; 2. Tunnel structure; 21. Horizontal tunnel; 22. Longitudinal tunnel; 23. Vertical tunnel; 3. Protective structure; 31. Insulation layer; 32. Repair layer; 33. Connection layer; 34. Protective layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-5 The present invention provides a high-thickness, low-pressure aluminum foil anode foil, comprising an aluminum base layer 1.

[0026] Reference Figures 1-5 The aluminum base layer 1 has a tunnel structure 2 inside. The tunnel structure 2 includes a transverse tunnel 21, a longitudinal tunnel 22 and a vertical tunnel 23. The transverse tunnels 21 are evenly opened inside the aluminum base layer 1. A longitudinal tunnel 22 is opened on one side of each transverse tunnel 21. A vertical tunnel 23 is evenly opened on one side of both the transverse tunnels 21 and the longitudinal tunnels 22. The transverse tunnels 21, the longitudinal tunnels 22 and the vertical tunnels 23 are all distributed at equal intervals inside the aluminum base layer 1. The transverse tunnels 21 and the longitudinal tunnels 22 are distributed perpendicular to each other. The transverse tunnels 21, the longitudinal tunnels 22 and the vertical tunnels 23 form a three-dimensional mesh porous structure.

[0027] The three-dimensional mesh-like porous structure formed by the transverse tunnel 21, longitudinal tunnel 22 and vertical tunnel 23 is formed by precise electrochemical etching of a high-purity, high-thickness aluminum substrate 1. These channels provide smooth pathways for electrolyte penetration and rapid ion migration, which helps to reduce the equivalent series resistance (ESR) of the capacitor and improve its high-frequency performance and charge / discharge efficiency.

[0028] Reference Figures 1-4 A protective structure 3 is fixed to the top of the aluminum base layer 1. The protective structure 3 includes an insulating layer 31, a repair layer 32, a connecting layer 33, and a protective layer 34. The insulating layer 31 is fixed to the top of the aluminum base layer 1. The repair layer 32 is fixed to the top of the insulating layer 31. The connecting layer 33 is provided at the top of the repair layer 32. The protective layer 34 is fixed to the top of the connecting layer 33. The insulating layer 31 is an aluminum oxide film layer, the repair layer 32 is a phosphate layer, the connecting layer 33 is a pressure-sensitive layer, and the protective layer 34 is a PVC layer.

[0029] The insulating layer 31 is uniformly distributed on the surface of the aluminum base layer 1, which can insulate the aluminum base layer 1 and store charge. The repair layer 32 can protect the insulating layer 31, fill the possible small defects and pinholes inside the insulating layer 31, significantly reduce leakage current, enhance the anti-hydration ability of the insulating layer 31, prevent its performance from degrading due to moisture in the air or subsequent processes, and improve the long-term reliability of the capacitor. The protective layer 34 covers the surface of the repair layer 32 through the connecting layer 33, which can protect the insulating layer 31 and the repair layer 32 during daily storage and prevent scratches on the repair layer 32 and the insulating layer 31.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-thickness, low-pressure aluminum foil anode foil, comprising an aluminum substrate (1); Its features are: The aluminum base layer (1) has a tunnel structure (2) inside; The top of the aluminum base layer (1) is fixed with a protective structure (3); The protective structure (3) includes an insulating layer (31), a repair layer (32), a connecting layer (33), and a protective layer (34). The insulating layer (31) is fixed to the top of the aluminum base layer (1). The repair layer (32) is fixed to the top of the insulating layer (31). The connecting layer (33) is provided at the top of the repair layer (32). The protective layer (34) is fixed to the top of the connecting layer (33).

2. The high-thickness, low-pressure aluminum foil anode foil according to claim 1, characterized in that: The tunnel structure (2) includes a transverse tunnel (21), a longitudinal tunnel (22) and a vertical tunnel (23). The transverse tunnel (21) is evenly opened inside the aluminum base layer (1). The longitudinal tunnel (22) is opened on one side of the transverse tunnel (21). The vertical tunnel (23) is evenly opened on one side of the transverse tunnel (21) and the longitudinal tunnel (22).

3. The high-thickness, low-pressure aluminum foil anode foil according to claim 2, characterized in that: The transverse tunnel (21), longitudinal tunnel (22) and vertical tunnel (23) are all distributed at equal intervals inside the aluminum base layer (1).

4. The high-thickness, low-pressure aluminum foil anode foil according to claim 2, characterized in that: The transverse tunnel (21) and the longitudinal tunnel (22) are distributed perpendicularly to each other, and the transverse tunnel (21), the longitudinal tunnel (22) and the vertical tunnel (23) constitute a three-dimensional mesh porous structure.

5. The high-thickness, low-pressure aluminum foil anode foil according to claim 1, characterized in that: The insulating layer (31) is an aluminum oxide thin film layer.

6. The high-thickness, low-pressure aluminum foil anode foil according to claim 1, characterized in that: The repair layer (32) is a phosphate layer.

7. The high-thickness, low-pressure aluminum foil anode foil according to claim 1, characterized in that: The connecting layer (33) is a pressure-sensitive layer, and the protective layer (34) is a PVC layer.

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