High-voltage ceramic capacitor

Abstract

The utility model relates to the technical field of capacitors, and discloses a high-voltage ceramic chip capacitor which comprises a ceramic medium, the bottom surface of the ceramic medium is fixedly connected with a first inner electrode, the top surface of the ceramic medium is fixedly connected with a second inner electrode, one end of the first inner electrode is fixedly connected with a first outer electrode, and the other end of the first inner electrode is fixedly connected with a second outer electrode. One end of the first inner electrode is fixedly connected with a first outer electrode, one end of the second inner electrode is fixedly connected with a second outer electrode, the sides, away from each other, of the first outer electrode and the second outer electrode are fixedly connected with stopping blocks, the outer walls of the stopping blocks are fixedly connected with terminals, a rubber sheet is fixedly connected between every two adjacent ceramic dielectrics, and the outer walls of the ceramic dielectrics are provided with insulating protection layers. And an outer package is arranged on the outer wall of the stopping block. According to the utility model, the capacitance value is increased through superposition of multiple layers of ceramic dielectric, the thickness and the dielectric constant of each layer of ceramic dielectric are controlled, a larger capacitance value is realized in a limited volume, and the problem that the capacitance value is limited is solved.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, and in particular to high-voltage ceramic capacitors. Background Technology

[0002] Ceramic capacitors are a common electronic component. The high dielectric constant of ceramic materials allows for smaller sizes of ceramic capacitors with the same capacitance value, which is beneficial for the miniaturization of electronic devices. The capacitance value is less affected by temperature and time changes, and the performance is stable over a wide temperature range, ensuring the normal operation of electronic devices under different ambient temperatures. The equivalent series inductance and equivalent series resistance are low, resulting in less loss of high-frequency signals. They can charge and discharge quickly, making them suitable for high-frequency filtering and coupling circuits. The excellent insulation properties of ceramics themselves can prevent short circuits of internal electrodes, improving circuit reliability. Ceramic materials are widely available, the manufacturing process is relatively simple, and the cost is low when mass-producing, resulting in a high cost-performance ratio.

[0003] High-voltage ceramic capacitors have many characteristics and advantages. They are divided into high-frequency high-voltage ceramic capacitors and low-frequency high-voltage ceramic capacitors. High-voltage ceramic capacitors can withstand high voltages, reaching thousands of volts, far exceeding that of ordinary capacitors. They can meet the needs of high-voltage circuits, ensuring the stability and reliability of power transmission. They also have a special series structure, making them suitable for long-term high-voltage operation with high reliability. Furthermore, their high current ramp-up rate is suitable for non-inductive structures in high-current circuits. The ceramic itself has excellent insulation properties, resulting in capacitors with high insulation resistance and long service life. They can prevent internal electrode short circuits and improve circuit reliability.

[0004] High-voltage ceramic capacitors are widely used in negative ion products, lasers, transformers, and electromechanical equipment requiring high voltage and high frequency. They also play an important role in metering, energy storage, and voltage division products in power systems and are indispensable components of high-power high-voltage electronic products. However, high-voltage ceramic capacitors have small capacitance and are fragile. In many circuit applications, when a large capacitance value is required to meet specific functional requirements, it is difficult to achieve the goal by relying on a single high-voltage ceramic capacitor. It is necessary to increase the overall capacitance value by connecting multiple high-voltage ceramic capacitors in parallel. However, this will make the circuit structure more complex and increase the cost, bringing many inconveniences to circuit design and practical application. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a high-voltage ceramic capacitor, which aims to improve the existing high-voltage ceramic capacitors, which have small capacitance and are fragile. In many circuit applications, when a large capacitance value is required to meet specific functional requirements, it is difficult to achieve the goal by relying on a single high-voltage ceramic capacitor. It is necessary to increase the overall capacitance value by connecting multiple high-voltage ceramic capacitors in parallel. However, this will make the circuit structure more complicated and increase the cost, bringing many inconveniences to circuit design and practical application.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-voltage ceramic capacitor, comprising a ceramic dielectric, an inner electrode one fixedly connected to the bottom surface of the ceramic dielectric, an inner electrode two fixedly connected to the top surface of the ceramic dielectric, an outer electrode one fixedly connected to one end of the inner electrode one, an outer electrode two fixedly connected to one end of the inner electrode two, a blocking block fixedly connected to the opposite side of the outer electrode one and the outer electrode two, a terminal fixedly connected to the outer wall of each blocking block, a rubber sheet fixedly connected between adjacent ceramic dielectrics, and a welding structure fixedly connected to the outer wall of the terminal for welding connection.

[0007] As a further description of the above technical solution:

[0008] The welding structure includes a pin, one end of which is fixedly connected to the outer wall of a terminal, a limiting block one is fixedly connected to the middle of the pin, solder is provided on the outer wall of the pin, a sliding hole is opened on the outer wall of the solder, the inner wall of the sliding hole is slidably connected to the outer wall of the pin, and a limiting block two is fixedly connected to one end of the pin.

[0009] As a further description of the above technical solution:

[0010] The terminals and pins are fixedly connected via contacts.

[0011] As a further description of the above technical solution:

[0012] The outer wall of the ceramic medium is provided with an insulating protective layer.

[0013] As a further description of the above technical solution:

[0014] A rubber sleeve is fixedly connected to the outer wall of the pin.

[0015] As a further description of the above technical solution:

[0016] The outer wall of the barrier block is provided with an outer enclosure.

[0017] As a further description of the above technical solution:

[0018] The inner electrode one and the inner electrode two are arranged in an intersecting manner.

[0019] As a further description of the above technical solution:

[0020] The outer packaging contains silicon micropowder.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, multiple layers of ceramic dielectric are stacked to increase the capacitance value. By controlling the thickness and dielectric constant of each ceramic dielectric layer, a larger capacitance value can be achieved within a limited volume, solving the problem of limited capacitance value. It can also reduce the voltage borne by each ceramic layer and improve the voltage withstand capability of the capacitor. In order to reduce fragility, a rubber sheet is added to the internal structure to reduce the risk of ceramic breakage caused by external force.

[0023] 2. In this utility model, limiting block one and limiting block two prevent the solder from sliding out of the predetermined area. The sliding of the solder can adjust the welding position, which facilitates the installation of the capacitor. Limiting block one and limiting block two are made of low melting point material, which will melt when welding the pins and will not affect the welding quality of the pins. Attached Figure Description

[0024] Figure 1 This is a front perspective view of the high-voltage ceramic capacitor proposed in this utility model;

[0025] Figure 2 This is a partial structural diagram of the high-voltage ceramic capacitor blocking block proposed in this utility model;

[0026] Figure 3 This is a partial structural diagram of the rubber sheet of the high-voltage ceramic capacitor proposed in this utility model;

[0027] Figure 4 This is a partial structural exploded view of the internal electrode of the high-voltage ceramic capacitor proposed in this utility model;

[0028] Figure 5 This is a partial structural schematic diagram of the high-voltage ceramic capacitor solder proposed in this utility model.

[0029] Legend:

[0030] 1. Ceramic dielectric; 2. Welded structure; 201. Pin; 202. Limiting block one; 203. Solder; 204. Sliding hole; 205. Limiting block two; 3. Inner electrode one; 4. Inner electrode two; 5. Rubber sheet; 6. Insulating protective layer; 7. Outer electrode one; 8. Outer electrode two; 9. Barrier block; 10. Terminal; 11. Contact; 12. Outer encapsulation; 13. Rubber sleeve. Detailed Implementation

[0031] 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.

[0032] Please see the appendix Figure 1 - Appendix Figure 3 This utility model provides an embodiment of a high-voltage ceramic capacitor, comprising a ceramic dielectric 1. The ceramic dielectric 1 possesses excellent insulation and dielectric properties, enabling it to effectively isolate charge and store electrical energy within the capacitor. An inner electrode 3 is fixedly connected to the bottom surface of the ceramic dielectric 1, and an inner electrode 4 is fixedly connected to the top surface of the ceramic dielectric 1. An outer electrode 7 is fixedly connected to one end of the inner electrode 3, and an outer electrode 8 is fixedly connected to one end of the inner electrode 4. The inner electrode 4 and the inner electrode 3 are made of metallic material and together constitute the two plates of the capacitor, insulated from each other by the ceramic dielectric 1. The inner electrode 4 works in conjunction with the inner electrode 3 in the circuit. When voltage is applied to the capacitor, it attracts and stores a charge with the opposite polarity to that of the inner electrode 3, thereby realizing the basic function of the capacitor in storing electrical energy. A blocking block 9 is fixedly connected to the opposite side of the outer electrode 7 and the outer electrode 8. Terminals 10 are fixedly connected to the outer walls of the capacitor 9. The outer electrode 7 leads out the charge collected by the inner electrode 3 to connect with the external circuit, realizing the charge transfer and interaction function of the capacitor in the entire circuit system. It is an important bridge between the inner electrode and the external circuit. Terminal 10 is the key part for connecting the high-voltage ceramic capacitor with the external circuit. It connects with the wires and components of the external circuit to realize the electrical connection between the capacitor and the entire circuit. Rubber sheets 5 are fixedly connected between the two adjacent ceramic dielectrics 1. The rubber sheets 5 can play a buffering role. The ceramic dielectric 1 itself is relatively brittle. When the capacitor is subjected to external force, the rubber sheets 5 can absorb and disperse the external force, reducing the risk of the ceramic dielectric 1 breaking due to external impact. This effectively protects the ceramic dielectric 1 and the internal structure of the entire capacitor, extends the service life of the capacitor, and improves its reliability in different environments. The outer walls of the terminals 10 are fixedly connected to welding structures 2, which are used for welding connections.

[0033] Please see the appendix Figure 3 - Appendix Figure 5The welding structure 2 includes a pin 201, one end of which is fixedly connected to the outer wall of the terminal 10. The pin 201 is made of a material with good conductivity and solderability, so that it can be smoothly welded to the external circuit. It acts as a bridge for current transmission between the capacitor and the external circuit, transferring the charge inside the capacitor connected to the terminal 10 to the external circuit through the welding point. A limiting block 202 is fixedly connected to the middle of the pin 201. Solder 203 is provided on the outer wall of the pin 201. A sliding hole 204 is opened on the outer wall of the solder 203. The inner wall of the sliding hole 204 is slidably connected to the outer wall of the pin 201. A limiting block 205 is fixedly connected to one end of the pin 201. The main function of the limiting block 202 and the limiting block 205 is to restrict the flow of the solder 203 during the welding process, preventing the solder 203 from flowing excessively and affecting the quality and stability of the welding.

[0034] Please see the appendix Figure 1 - Appendix Figure 3 Terminal 10 and pin 201 are fixedly connected via contact 11. Contact 11 is the key part for achieving electrical connection between terminal 10 and pin 201, ensuring that the charge transferred from terminal 10 can be accurately transmitted to the external circuit through pin 201. An insulating protective layer 6 is provided on the outer wall of the ceramic dielectric 1. The insulating protective layer 6 enhances the insulation performance of the ceramic dielectric 1, preventing leakage caused by external environmental factors during capacitor operation. It ensures that the charge storage and transmission process inside the capacitor can be carried out in a safe and stable insulating environment, guaranteeing the electrical performance and safety of the capacitor. A rubber sleeve 13 is fixedly connected to the outer wall of pin 201. The rubber sleeve 13 protects pin 201, preventing deformation and damage to pin 201 due to accidental external forces during capacitor installation and use, thereby affecting the connection performance and current transmission function of the welding structure 2. The rubber sleeve 13 also serves as insulation, reducing leakage caused by pin 201 contacting other objects.

[0035] Please see the appendix Figure 2 - Appendix Figure 4 The outer wall of the barrier block 9 is provided with an outer package 12. The inner electrode 3 and the inner electrode 4 are arranged in an intersecting manner. Silicon powder is added inside the outer package 12. The main purpose of the outer package 12 is to encapsulate and protect part of the capacitor structure, which can prevent external environmental factors from corroding and affecting the internal structure of the capacitor, keep the inside of the capacitor clean and dry, and ensure the stability of its electrical performance. Adding silicon powder can effectively reduce the residual stress of the outer package 12 and improve the voltage withstand qualification rate of the ceramic chip.

[0036] Working principle: The capacitance value is increased by stacking multiple layers of ceramic dielectric 1. By controlling the thickness and dielectric constant of each ceramic dielectric 1 layer, a larger capacitance value can be achieved within a limited volume, solving the problem of limited capacitance value. It can also reduce the voltage that each ceramic layer is subjected to, thereby improving the voltage withstand capability of the capacitor. In order to reduce fragility, a rubber sheet 5 is added to the internal structure to reduce the risk of ceramic breakage caused by external force.

[0037] Limiting block 1 202 and limiting block 205 prevent solder 203 from sliding out of the predetermined area. The sliding of solder 203 can adjust the welding position, which facilitates the installation of capacitor. Limiting block 1 202 and limiting block 205 are made of low melting point material, which will melt when welding pin 201, and will not affect the welding quality of pin 201.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A high-voltage ceramic capacitor, comprising a ceramic dielectric (1), characterized in that: An inner electrode 1 (3) is fixedly connected to the bottom surface of the ceramic medium (1), an inner electrode 2 (4) is fixedly connected to the top surface of the ceramic medium (1), an outer electrode 1 (7) is fixedly connected to one end of the inner electrode 1 (3), an outer electrode 2 (8) is fixedly connected to one end of the inner electrode 2 (4), a blocking block (9) is fixedly connected to the opposite side of the outer electrode 1 (7) and the outer electrode 2 (8), a terminal (10) is fixedly connected to the outer wall of the blocking block (9), a rubber sheet (5) is fixedly connected between the two adjacent ceramic media (1), and a welding structure (2) is fixedly connected to the outer wall of the terminal (10), the welding structure (2) is used for welding connection.

2. The high-voltage ceramic capacitor according to claim 1, characterized in that: The The welding structure (2) includes a pin (201), one end of which is connected to a terminal (10). The outer wall is fixedly connected, and the middle part of the pin (201) is fixedly connected to the limit block (202). The outer wall of the pin (201) is provided with solder (203), and the outer wall of the solder (203) is provided with a sliding hole (204). The inner wall of the sliding hole (204) is slidably connected to the outer wall of the pin (201), and one end of the pin (201) is fixedly connected to a limit block two (205).

3. The high-voltage ceramic capacitor according to claim 1, characterized in that: The terminal (10) and the pin (201) are fixedly connected by the contact (11).

4. The high-voltage ceramic capacitor according to claim 1, characterized in that: The An insulating protective layer (6) is provided on the outer wall of the ceramic medium (1).

5. The high-voltage ceramic capacitor according to claim 2, characterized in that: A rubber sleeve (13) is fixedly connected to the outer wall of the pin (201).

6. The high-voltage ceramic capacitor according to claim 1, characterized in that: The outer wall of the blocking block (9) is provided with an outer encapsulation (12).

7. The high-voltage ceramic capacitor according to claim 1, characterized in that: The inner electrode one (3) and the inner electrode two (4) are arranged in a cross configuration.

8. The high-voltage ceramic capacitor according to claim 6, characterized in that: The outer package (12) contains silicon micropowder.

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