A hybrid dielectric capacitor with high self-healing and long life capability

Abstract

This invention discloses a hybrid dielectric capacitor with high self-healing and long lifespan capabilities, relating to the field of capacitor technology. The invention includes a capacitor core assembly and a housing. The capacitor core assembly is formed by winding a first dielectric film and a second dielectric film. Electrodes are soldered onto the capacitor core assembly. The first dielectric film is a metallized polypropylene film, and the second dielectric film is a metallized polyester film. Both the first and second dielectric films have a metal plating layer, which is formed by evaporating and adsorbing metal material onto the film surface under high vacuum. This invention uses metallized films of two different dielectrics, polypropylene and polyester, to form the capacitor core assembly, combining the high dielectric constant of polyester and the strong self-healing ability of polypropylene. This fully utilizes the advantages of both dielectrics, significantly improving the overall performance of the capacitor.

Description

Technical Field

[0001] This invention belongs to the field of capacitor technology, and in particular relates to a hybrid dielectric capacitor with high self-healing and long lifespan capability. Background Technology

[0002] A capacitor, also known as a capacitance, is a passive electronic component capable of storing and releasing electrical charge. It consists of two conductors with a dielectric (insulating material) sandwiched between them. When a capacitor is connected to a power source, charge separation occurs at the positive and negative terminals, creating an electric field that is stored in the dielectric. Capacitors have the ability to store and release charge, providing instantaneous changes in current within a circuit. The main characteristic of a capacitor is its capacitance value (measured in farads, F), which indicates its ability to store charge. A larger capacitance value means the capacitor can store more charge. Additionally, capacitors have a rated voltage, indicating the maximum voltage they can withstand.

[0003] In the existing technology, most capacitors are single-dielectric capacitors, which have a simple structure and low cost. However, the inherent characteristics of a single dielectric make it difficult for capacitors to meet multiple requirements such as high capacitance, high withstand voltage, low loss, and wide temperature stability at the same time. At the same time, organic dielectrics (such as polyester film) will gradually age due to oxidation, thermal stress, etc. after long-term use, and their dielectric properties will degrade. The electrolyte of electrolytic capacitors will evaporate over time, resulting in a decrease in capacitance and eventual failure.

[0004] The drawbacks of single-dielectric capacitors are essentially limited by the inherent properties of a single dielectric material. To overcome these shortcomings, this invention proposes a hybrid dielectric capacitor with high self-healing and long lifespan capabilities to solve the problems of low dielectric constant and short service life. Utility Model Content

[0005] The purpose of this invention is to provide a hybrid dielectric capacitor with high self-healing and long lifespan capability, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hybrid dielectric capacitor with high self-healing and long lifespan capability includes a capacitor core assembly and a housing. The capacitor core assembly is formed by winding a first dielectric film and a second dielectric film. The capacitor core assembly has electrodes led out by welding. The side of the housing is provided with an electrode anti-detachment mechanism.

[0008] Furthermore, the first dielectric film is a metallized polypropylene film, and the second dielectric film is a metallized polyester film. By combining the high dielectric constant of polyester and the strong self-healing ability of polypropylene, the advantages of the two dielectrics can be fully utilized, resulting in a significant improvement in the overall performance of the capacitor.

[0009] Furthermore, both the first dielectric film and the second dielectric film have a metal coating on their surfaces. The metal coating is formed by evaporating and adsorbing metal material onto the film surface under a high vacuum environment. The metal coating made of metal material serves as the metal plate of the capacitor.

[0010] Furthermore, the outer casing seals and encloses the capacitor core assembly, and the sealing method of the outer casing is epoxy resin sealing. The electrode is electrically connected to the metal plating layer on the surface of the first dielectric film and the second dielectric film, and the outer casing provides sealed protection for the wound capacitor core assembly.

[0011] Furthermore, the electrode anti-detachment mechanism includes a mounting plate, a slot, and an opening slot. A groove is formed on the circumferential surface of the mounting plate, and a telescopic spring is provided inside the groove. An arc-shaped block is slidably connected inside the groove through the telescopic spring. The slot is formed on the inner wall of the outer shell, and a pressure plate is slidably connected inside the slot. The opening slot is formed on the surface of the outer shell, and a connecting rod is slidably connected through the opening slot. An arc plate is fixedly connected to the top of the connecting rod.

[0012] Furthermore, the end of the arc-shaped block away from the telescopic spring is initially located in the slot, and the lateral width of the slot is equal to the lateral width of the groove. The bottom of the connecting rod is fixedly connected to the top of the pressure plate, and the arc-shaped block is stuck in the slot so that the mounting plate cannot leave the outer shell.

[0013] Compared with the prior art, the advantages of this utility model are as follows:

[0014] 1. This utility model uses metallized films made of polypropylene and polyester, two different dielectrics, to form a capacitor core assembly. It combines the high dielectric constant of polyester and the strong self-healing ability of polypropylene, giving full play to the advantages of the two dielectrics and significantly improving the overall performance of the capacitor.

[0015] 2. This utility model uses metallized films of two different dielectrics, polypropylene and polyester, to form a capacitor core assembly. Compared with single-dielectric capacitors, the hybrid dielectric capacitor of this utility model has a longer life and can better adapt to the needs of various application scenarios.

[0016] 3. This utility model has an electrode anti-detachment mechanism, which, through the cooperation of components such as arc-shaped blocks, grooves, and slots, can firmly fix the mounting plate to the side of the outer shell near the electrode. The mounting plate can prevent the electrode from falling off during use. Attached Figure Description

[0017] Figure 1 This is a three-dimensional front view of the overall structure of this utility model;

[0018] Figure 2 This is a three-dimensional sectional view of the overall structure of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0020] Figure 4 This is a three-dimensional sectional view of the structure at the mounting plate of this utility model;

[0021] Figure 5 This is a three-dimensional schematic diagram of the overall structure of the mounting plate of this utility model;

[0022] Figure 6 This is a three-dimensional schematic diagram of the electrode structure of this utility model;

[0023] Figure 7 This is a three-dimensional schematic diagram of the capacitor core assembly structure of this utility model.

[0024] In the figure: 1. Capacitor core assembly; 11. First dielectric film; 12. Second dielectric film; 2. Electrode; 3. Housing; 4. Electrode anti-detachment mechanism; 41. Mounting plate; 42. Groove; 43. Telescopic spring; 44. Arc block; 45. Slot; 46. Pressure plate; 47. Opening slot; 48. Arc plate; 49. Connecting rod. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] Please see Figures 1-7As shown, this utility model is a hybrid dielectric capacitor with high self-healing and long lifespan capability, including a capacitor core assembly 1 and a shell 3. The capacitor core assembly 1 is formed by winding a first dielectric film 11 and a second dielectric film 12. The capacitor core assembly 1 leads out electrodes 2 by welding. The side of the shell 3 is provided with an electrode anti-detachment mechanism 4.

[0028] As shown in the figure, the first dielectric film 11 is a metallized polypropylene film, and the second dielectric film 12 is a metallized polyester film. By combining the high dielectric constant of polyester and the strong self-healing ability of polypropylene, the advantages of the two dielectrics can be fully utilized, resulting in a significant improvement in the overall performance of the capacitor.

[0029] As shown in the figure, both the surface of the first dielectric film 11 and the second dielectric film 12 are provided with a metal coating, and the metal coating is formed by evaporating and adsorbing the metal material onto the film surface in a high vacuum environment.

[0030] As shown in the figure, the outer shell 3 seals and wraps the capacitor core assembly 1, and the sealing method of the outer shell 3 is epoxy resin sealing. The electrode 2 is electrically connected to the metal plating layer on the surface of the first dielectric film 11 and the second dielectric film 12. The outer shell 3 provides sealing protection for the wound capacitor core assembly 1.

[0031] As shown in the figure, the electrode anti-detachment mechanism 4 includes a mounting plate 41, a slot 45, and an opening slot 47. A groove 42 is provided on the circumferential surface of the mounting plate 41. A telescopic spring 43 is provided inside the groove 42. An arc-shaped block 44 is slidably connected inside the groove 42 through the telescopic spring 43. The slot 45 is opened on the inner wall of the outer shell 3. A pressure plate 46 is slidably connected inside the slot 45. The opening slot 47 is opened on the surface of the outer shell 3. A connecting rod 49 is slidably connected through the opening slot 47. An arc plate 48 is fixedly connected to the top of the connecting rod 49.

[0032] As shown in the figure, the end of the arc-shaped block 44 away from the telescopic spring 43 is initially located in the slot 45, and the lateral width of the slot 45 is equal to the lateral width of the groove 42. The bottom of the connecting rod 49 is fixedly connected to the top of the pressure plate 46. The arc-shaped block 44 is stuck in the slot 45, so that the mounting plate 41 cannot leave the outer shell 3.

[0033] One specific application of this embodiment is as follows: During manufacturing, metallic aluminum or zinc is evaporated and adsorbed onto the surfaces of the first dielectric film 11 and the second dielectric film 12 under a high vacuum environment to form a metal plating layer. This metal plating layer serves as the metal electrode plate of the capacitor. First, the first dielectric film 11 and the second dielectric film 12 are paired and wound together using a winding device to form a capacitor core assembly 1. Then, the capacitor core assembly 1 is fixed inside the outer casing 3 by welding, and the electrodes 2 are led out by welding. Finally, the outer casing 3 is sealed to form a hybrid dielectric capacitor. By combining the characteristics of the second dielectric film 12 with its high dielectric constant and the first dielectric film 11 with its strong self-healing ability, the advantages of both dielectrics can be fully utilized, resulting in a significant improvement in the overall performance of the capacitor. Compared to single-dielectric capacitors, it has a higher dielectric constant and a longer lifespan, making it better suited to various application scenarios. When installing the mounting plate 41, align the holes on the surface of the mounting plate 41 with the electrode 2 and press it towards the outer casing 3. Initially, the arc surface of the arc block 44 will be compressed and retract into the groove 42, compressing the telescopic spring 43. When the groove 42 moves and coincides with the position of the slot 45, the telescopic spring 43 rebounds and drives the arc block 44 to be inserted into the slot 45, thus firmly fixing the mounting plate 41 to the side of the outer casing 3 near the electrode 2. The mounting plate 41 can also prevent the electrode 2 from falling off during use. When disassembly is required, the arc plate 48 can be pressed to move the connecting rod 49 and the pressure plate 46 downward, squeezing the arc block 44 out of the slot 45.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hybrid dielectric capacitor with high self-healing and long lifespan capability, comprising a capacitor core assembly (1) and a casing (3), characterized in that: The capacitor core assembly (1) is formed by winding a first dielectric film (11) and a second dielectric film (12). The capacitor core assembly (1) has electrodes (2) led out by welding. The side of the outer shell (3) is provided with an electrode anti-detachment mechanism (4).

2. The hybrid dielectric capacitor with high self-healing and long lifespan capability according to claim 1, characterized in that, The first dielectric film (11) is a metallized polypropylene film, and the second dielectric film (12) is a metallized polyester film.

3. A hybrid dielectric capacitor with high self-healing and long lifespan capability according to claim 2, characterized in that, The surfaces of the first dielectric film (11) and the second dielectric film (12) are both provided with metal coatings, and the metal coatings are formed by evaporating and adsorbing metal materials onto the film surface under a high vacuum environment.

4. A hybrid dielectric capacitor with high self-healing and long lifespan capability according to claim 3, characterized in that, The outer casing (3) seals and encloses the capacitor core assembly (1), and the sealing method of the outer casing (3) is epoxy resin sealing. The electrode (2) is electrically connected to the metal plating layer on the surface of the first dielectric film (11) and the second dielectric film (12).

5. A hybrid dielectric capacitor with high self-healing and long lifespan capability according to claim 4, characterized in that, The electrode anti-detachment mechanism (4) includes a mounting plate (41), a slot (45), and an opening slot (47). A groove (42) is provided on the circumferential surface of the mounting plate (41). A telescopic spring (43) is provided inside the groove (42). An arc-shaped block (44) is slidably connected inside the groove (42) through the telescopic spring (43). The slot (45) is opened on the inner wall of the outer shell (3). A pressure plate (46) is slidably connected inside the slot (45). The opening slot (47) is opened on the surface of the outer shell (3). A connecting rod (49) is slidably connected inside the opening slot (47). An arc plate (48) is fixedly connected to the top of the connecting rod (49).

6. A hybrid dielectric capacitor with high self-healing and long lifespan capability according to claim 5, characterized in that, The end of the arc-shaped block (44) away from the telescopic spring (43) is initially located in the slot (45), and the width of the slot (45) is equal to the width of the groove (42). The bottom of the connecting rod (49) is fixedly connected to the top of the pressure plate (46).

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