A novel capacitor structure with high heat dissipation and insulation

Abstract

This utility model relates to the field of capacitor technology, and in particular to a novel capacitor structure with high-efficiency heat dissipation and insulation. The structure includes a shell, which comprises a metal casing. An insulating gasket is fixedly fitted inside the metal casing, and a capacitor core is disposed within the insulating gasket. The outer surface of the metal casing has several through-holes for heat dissipation. This novel capacitor structure with high-efficiency heat dissipation and insulation utilizes heat-conducting metal blocks on the positive and negative busbars, which fit tightly with the metal casing to create a high-efficiency heat conduction channel. Combined with the annular array of heat dissipation holes on the surface of the metal casing, a three-dimensional heat dissipation system is formed. Under high-power conditions, the heat generated by the capacitor core can be quickly conducted to the outside, effectively suppressing thermal aging of components and improving the long-term operational stability and service life of the capacitor. It has significant application value in fields such as fast charging of new energy vehicles and high-frequency power conversion.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, and in particular to a novel capacitor structure with high efficiency in heat dissipation and insulation. Background Technology

[0002] With the rapid development of power electronics technology, capacitors, as an indispensable basic component, are increasingly being used in a wide range of fields such as industrial control, new energy, automotive electronics, rail transportation, and power grids. Their performance directly affects the operational stability and reliability of electronic equipment and even the entire system.

[0003] However, traditional capacitors still have the following problems: 1. Traditional capacitors generate heat during operation, especially in high-power, large-capacity applications, where heat dissipation is more prominent. If the heat cannot be dissipated in time, the internal temperature of the capacitor will rise, which will affect its electrical performance, shorten its service life, and even easily cause safety problems; 2. Traditional capacitors usually use insulating paper between the positive and negative busbars to achieve insulation, but the creepage distance is limited by national standards, which requires the removal of part of the busbar, reducing the busbar stacked area and making it difficult to meet the low self-inductance requirements. Therefore, we have introduced a new type of capacitor structure with high efficiency in heat dissipation and insulation. Utility Model Content

[0004] The main objective of this invention is to provide a novel capacitor structure with high-efficiency heat dissipation and insulation, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A novel capacitor structure with high efficiency in heat dissipation and insulation includes a shell, the shell comprising a metal casing, an insulating liner fixedly sleeved inside the metal casing, a capacitor core disposed inside the insulating liner, a plurality of through-holes for heat dissipation on the outer surface of the metal casing, and through-holes for mounting at both the upper and lower ends of the metal casing.

[0007] Preferably, the upper and lower surfaces of the capacitor core are coated with metal surfaces, and a positive busbar and a negative busbar are respectively connected to the two metal surfaces. The positive busbar and the negative busbar have the same structure and are distributed in a mirror image.

[0008] By adopting the above technical solution, the heat generated by the capacitor core is conducted to the positive and negative busbars and the negative busbar through the metal surface, and then quickly transferred through the heat-conducting metal block. With the help of the heat dissipation holes distributed in a ring array, efficient heat dissipation is achieved, effectively reducing the internal temperature and improving the working stability and service life.

[0009] Preferably, the positive busbar includes a positive busbar connection part, a stacked block, an insulating pad, an insulating sleeve, and a heat-conducting metal block. The stacked block and the insulating pad are each provided in multiples, and the multiple stacked blocks and the multiple insulating pads are stacked and arranged in pairs, and fixedly connected together. The lower end of the positive busbar connection part is fixedly connected to the upper end of the upper insulating pad, and the upper end of the positive busbar connection part is fixedly connected to the positive busbar lead-out part.

[0010] By adopting the above technical solution, the positive busbar has a structure design in which several stacked blocks and insulating pads are stacked alternately, which greatly increases the insulation path length between the positive and negative busbars and effectively improves the creepage distance.

[0011] Preferably, the stacked block located on the lower side is disposed on the metal surface at the upper end of the capacitor core, and the insulating sleeve is fixedly sleeved on the positive busbar lead-out portion.

[0012] By adopting the above technical solution, the lower stacked block is directly set on the metal surface at the top of the capacitor core, which shortens the heat and electrical energy transmission path, reduces contact resistance, ensures efficient and stable current conduction, enhances the reliability of the electrical connection between the capacitor core and the positive busbar, and improves the overall electrical performance.

[0013] Preferably, the heat-conducting metal block is fixedly sleeved on several stacked blocks, several insulating pads, and the positive busbar connection part, and the upper part of the heat-conducting metal block is fixedly sleeved in the mounting hole.

[0014] By adopting the above technical solution, a heat-conducting metal block is fixedly sleeved on the laminated block, insulating pad and positive busbar connection part to form a large-area, multi-node heat-conducting network, which can quickly and fully absorb the heat generated by the capacitor core, and efficiently conduct the heat to the external heat sink through the upper part fixedly sleeved with the mounting hole.

[0015] Preferably, the upper part of the outer surface of the heat-conducting metal block has a through-hole.

[0016] By adopting the above technical solution, the inner and outer through-holes in the upper part of the outer surface of the heat-conducting metal block can be connected to the external heat sink through bolts.

[0017] Preferably, a plurality of the heat dissipation holes are distributed in a central ring array around the metal casing.

[0018] By adopting the above technical solution:

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In this utility model, by setting heat-conducting metal blocks on the positive and negative busbars, which are closely matched with the metal shell, an efficient heat conduction channel is constructed. Combined with the heat dissipation holes distributed in a ring array on the surface of the metal shell, a three-dimensional heat dissipation system is formed. Under high power conditions, the heat generated by the capacitor core can be quickly conducted to the outside, effectively suppressing the thermal aging of the components and improving the long-term working stability and service life of the capacitor. It has outstanding application value in the fields of fast charging of new energy vehicles and high-frequency power conversion.

[0021] 2. In this utility model, by staggering the stacked blocks and insulating pads, the insulation path length between the positive and negative busbars is greatly increased, the creepage distance is improved, and the busbar stack area is expanded to optimize low self-inductance performance. The insulating pads, insulating sleeves and insulating mats work together to block leakage and short circuit risks in all directions. Even in harsh environments with high humidity and high dust, the insulation failure rate is reduced, ensuring safe and reliable operation of the equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a novel capacitor structure with high efficiency in heat dissipation and insulation according to the present invention.

[0023] Figure 2 This is a cross-sectional view of a novel capacitor structure with high-efficiency heat dissipation and insulation according to the present invention (the outer shell is cut out).

[0024] Figure 3 This is a cross-sectional view of the outer shell of a novel capacitor structure with high-efficiency heat dissipation and insulation according to the present invention (the metal shell is cut out).

[0025] Figure 4 This is an exploded view of the positive busbar structure of a novel capacitor structure with high efficiency in heat dissipation and insulation according to this utility model.

[0026] Figure 5 This utility model discloses a novel capacitor structure with high efficiency in heat dissipation and insulation. Figure 4 Enlarged view of the structure at point A in the image.

[0027] In the diagram: 1. Outer shell; 2. Capacitor core; 3. Metal surface; 4. Positive busbar; 5. Negative busbar; 11. Metal casing; 12. Insulating pad; 13. Heat dissipation hole; 14. Mounting hole; 41. Positive busbar connection part; 42. Stacked block; 43. Insulating pad; 44. Insulating sleeve; 45. Positive busbar lead-out part; 46. Thermally conductive metal block; 47. Screw hole. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0029] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Please see Figure 1-5 This utility model provides a technical solution:

[0032] A novel capacitor structure with high efficiency in heat dissipation and insulation includes a shell 1, which includes a metal shell 11. An insulating pad 12 is fixedly sleeved inside the metal shell 11, and a capacitor core 2 is disposed inside the insulating pad 12. Several heat dissipation holes 13 are opened on the outer surface of the metal shell 11, and mounting holes 14 are opened on the upper and lower ends of the metal shell 11.

[0033] In this embodiment, the upper and lower surfaces of the capacitor core 2 are coated with metal surfaces 3. A positive busbar 4 and a negative busbar 5 are respectively connected to the two metal surfaces 3. The positive busbar 4 and the negative busbar 5 have identical structures and are arranged in a mirror image. The positive busbar 4 includes a positive busbar connection part 41, a stacked block 42, an insulating pad 43, an insulating sleeve 44, and a heat-conducting metal block 46. Several stacked blocks 42 and insulating pads 43 are provided, stacked together, and fixedly connected in a staggered arrangement. The lower end of the positive busbar connection part 41 is connected to... The upper end of the upper insulating pad 43 is fixedly connected, and the upper end of the positive busbar connection part 41 is fixedly connected to the positive busbar lead-out part 45; the stacked block 42 located on the lower side is disposed on the metal surface 3 at the upper end of the capacitor core 2, and the insulating sleeve 44 is fixedly sleeved on the positive busbar lead-out part 45; the heat-conducting metal block 46 is fixedly sleeved on several stacked blocks 42, several insulating pads 43 and positive busbar connection part 41, and the upper part of the heat-conducting metal block 46 is fixedly sleeved in the mounting hole 14; the upper part of the outer surface of the heat-conducting metal block 46 has a through screw hole 47; several heat dissipation holes 13 are distributed in a ring array around the center of the metal shell 11.

[0034] It should be noted that this utility model is a novel capacitor structure with high efficiency in heat dissipation and insulation. During use, the heat generated by the capacitor core 2 is first transferred to the metal surface 3, and then conducted to the metal shell 11 through the heat-conducting metal blocks 46 on the positive busbar 4 and negative busbar 5 connected to the metal surface 3. Since the outer surface of the metal shell 11 is provided with heat dissipation holes 13 arranged in a ring array, the heat can be quickly dissipated to the surrounding environment through these heat dissipation holes 13, thereby effectively reducing the temperature of the capacitor core 2 and ensuring the stability and reliability of the capacitor when working at high power. The insulating pad 12 fixedly sleeved inside the metal shell 11 isolates the capacitor core 2 from the metal shell 11 to prevent leakage. At the same time, several stacked blocks 42 and insulating pads 43 are stacked alternately on the positive busbar 4 and negative busbar 5, and together with the insulating sleeve 44 fixedly sleeved on the positive busbar lead-out part 45, short circuit between the positive and negative poles is effectively avoided, so that it can work stably in harsh environments such as humidity.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel capacitor structure with high-efficiency heat dissipation and insulation, comprising a housing (1), characterized in that: The outer casing (1) includes a metal casing (11), an insulating pad (12) is fixedly sleeved inside the metal casing (11), a capacitor core (2) is provided inside the insulating pad (12), a plurality of heat dissipation holes (13) are opened on the outer surface of the metal casing (11), and mounting holes (14) are opened at the upper and lower ends of the metal casing (11). The upper and lower surfaces of the capacitor core (2) are coated with metal surfaces (3), and positive busbars (4) and negative busbars (5) are connected to the two metal surfaces (3) respectively. The positive busbars (4) and negative busbars (5) have the same structure and are distributed in a mirror image. The positive busbar (4) includes a positive busbar connection part (41), a stacked block (42), an insulating pad (43), an insulating sleeve (44), and a heat-conducting metal block (46). The stacked block (42) and the insulating pad (43) are each set in multiples. The stacked blocks (42) and the insulating pads (43) are stacked and arranged in pairs, and the stacked blocks (42) and the insulating pads (43) are arranged in pairs and fixedly connected together. The lower end of the positive busbar connection part (41) is fixedly connected to the upper end of the upper insulating pad (43). The upper end of the positive busbar connection part (41) is fixedly connected to the positive busbar lead-out part (45).

2. The novel capacitor structure with high-efficiency heat dissipation and insulation according to claim 1, characterized in that: The stacked block (42) located on the lower side is disposed on the metal surface (3) at the upper end of the capacitor core (2), and the insulating sleeve (44) is fixedly sleeved on the positive busbar lead-out part (45).

3. The novel capacitor structure with high-efficiency heat dissipation and insulation according to claim 1, characterized in that: The heat-conducting metal block (46) is fixedly sleeved on several stacked blocks (42), several insulating pads (43) and positive busbar connection part (41), and the upper part of the heat-conducting metal block (46) is fixedly sleeved in the mounting hole (14).

4. The novel capacitor structure with high-efficiency heat dissipation and insulation according to claim 1, characterized in that: The upper part of the outer surface of the heat-conducting metal block (46) has a through-hole (47).

5. The novel capacitor structure with high-efficiency heat dissipation and insulation according to claim 1, characterized in that: Several of the heat dissipation holes (13) are arranged in a ring array around the center of the metal casing (11).

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