Thin film capacitor structure

Abstract

The utility model relates to the technical field of thin-film capacitors, and discloses a thin-film capacitor structure, which comprises a bottom plate, a support rod fixedly mounted at the top of the bottom plate, a top plate fixedly mounted at the top of the support rod, a plurality of fixing plates fixedly mounted on the outer side of the support rod, and a plurality of capacitor cores fixedly mounted on the inner sides of two adjacent fixing plates. The bottom plate is fixedly provided with a rock wool film on the outer side of the fixed plate; the heat-conducting gel and the rock wool film can protect the capacitor core body by means of high heat absorptivity of the heat-conducting gel and the rock wool film, absorb heat generated when the capacitor core body works to the heat-conducting gel and the rock wool film, block and intercept external flowing air through the wind shield arranged on the outer side of the shell, and enter the flow air cavity through the ventilation position, so that the heat-conducting gel and the rock wool film can effectively protect the capacitor core body. And the heat in the rock wool film is sucked out through flowing air, so that the heat dissipation work of the capacitor is completed, the influence of excessive heat in the capacitor on the work is avoided, the potential safety hazard caused by overheating is avoided, and the stable inertia of the capacitor is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of film capacitors, in particular to a film capacitor structure. Background Art

[0002] In recent years, the emergence of a new generation of high-power devices such as silicon carbide and gallium nitride has made the power of electronic devices used in power equipment power conversion and control circuits higher and higher, their voltage resistance is getting higher and higher, and the output current is getting larger and larger. Therefore, thin film capacitor components are needed. As the name suggests, film capacitors are a type of container for storing electricity. They are often used as supporting components for high-power devices to filter and store past currents. Usually, aluminum-plated sheets and plastic sheets are used as positive and negative electrodes inside the capacitor. The current is stored in the medium. The capacitor will generate more heat when working normally. How to effectively dissipate heat, increase the storage capacity of capacitors and reduce the size is an important development direction for this type of equipment.

[0003] The patent with announcement number CN217690807U proposes a high-voltage film capacitor structure, which includes a shell and a capacitor core, the capacitor core is arranged in the shell and filled with potting material, the capacitor core is connected to the lead-out electrode, the shell includes a plastic shell, a stainless steel connecting plate is installed at the bottom of the plastic shell, the side of the stainless steel connecting plate is turned outward and has a notch to form a mounting ear, the capacitor core is formed by connecting copper plates to form a core group, the inner wall of the shell is provided with a rough layer, the core group includes three groups of stacked capacitor cores, each of the capacitor cores is installed with the connecting copper plates on the front and back, the size of the connecting copper plates corresponds to the capacitor core, adjacent capacitor cores are connected by the connecting copper plates, and the lead-out electrodes are connected to the connecting copper plates on the outside of both ends.

[0004] When in use, the device can withstand higher voltages through the capacitor core setting inside the outer shell, and the outer shell structure setting makes the device have insulation function to prevent leakage of the device. However, when the capacitor is actually working, it needs to withstand a higher voltage, which causes the inside of the capacitor to heat up and generate more heat, which in turn affects the normal operation of the capacitor. It may even overheat and catch fire when working at high loads, causing work hazards and reducing the practicality of the capacitor. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the deficiencies of the prior art, the utility model provides a thin film capacitor structure, which overcomes the deficiency of the prior art that, during actual operation, it is necessary to withstand a higher voltage, causing the internal part of the capacitor to heat up and generate more heat, thereby affecting the normal operation of the capacitor, and may even cause overheating and fire when operating at high loads, causing work hazards and reducing the practicality of the capacitor.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a film capacitor structure, including a bottom plate, a support rod is fixedly installed on the top of the bottom plate, a top plate is fixedly installed on the top of the support rod, a plurality of fixed plates are fixedly installed on the outside of the support rod, a plurality of capacitor cores are fixedly installed on the inner sides of two adjacent fixed plates, a rock wool film is fixedly installed on the outside of the fixed plate on the bottom plate, the top of the rock wool film is fixedly installed on the bottom of the top plate, a shell is fixedly installed on the outside of the rock wool film on the bottom plate, the top of the shell is fixedly connected to the bottom of the top plate, a plurality of ventilation places are opened inside the shell, a plurality of wind shields are fixedly installed on the outside of the shell, the positions and quantities of the wind shields and the ventilation places are one-to-one corresponding, conductive blocks are fixedly installed on both ends of the top of the top plate, and pins are fixedly installed on both ends of the bottom of the bottom plate.

[0008] As a preferred technical solution of the utility model, a plurality of air guide grooves are provided on the inner side of the shell, and the air guide grooves are distributed in an annular pattern from top to bottom and are parallel to the bottom plate.

[0009] As a preferred technical solution of the utility model, a plurality of diverter grooves are provided on the inner side of the housing. The diverter grooves are located on the inner side of two adjacent air guide grooves and penetrate the two adjacent air guide grooves.

[0010] As a preferred technical solution of the utility model, conductive electrodes are fixedly installed at both ends of the conductive block.

[0011] As a preferred technical solution of the utility model, a lead wire is fixedly installed inside the pin.

[0012] As a preferred technical solution of the utility model, the inner side of the rock wool membrane is fixedly connected to the outer sides of the plurality of fixed plates, and the gaps between the plurality of capacitor cores are filled with thermally conductive gel.

[0013] As a preferred technical solution of the utility model, an air flow cavity is provided between the outer shell and the rock wool membrane.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The thermally conductive gel and rock wool film provided in the present invention can absorb the heat generated by the capacitor core during operation while protecting the capacitor core by virtue of their own high heat absorption, and then block and intercept the external flowing air through the wind shield provided on the outer side of the shell, enter the air flow cavity through the ventilation area, and absorb the heat inside the rock wool film through the flowing air, thereby completing the heat dissipation work of the capacitor, avoiding excessive internal heat of the capacitor to affect the work, avoiding safety hazards caused by overheating, and enhancing the stable inertia of the capacitor.

[0015] (2) The air guide grooves provided inside the shell of the utility model and the diversion grooves provided between two adjacent air guide grooves can increase the flow velocity of the air entering the air flow cavity, thereby accelerating the heat dissipation speed of the rock wool film by the air, making the heat dissipation efficiency of the capacitor faster and enhancing the practicality of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0017] Figure 1 This is a three-dimensional diagram of a film capacitor structure proposed by the utility model.

[0018] Figure 2 This is a three-dimensional diagram of a shell of a film capacitor structure proposed by the utility model.

[0019] Figure 3 The utility model is a cross-sectional view of a film capacitor structure.

[0020] Figure 4 This is a three-dimensional diagram of a conductive block of a thin film capacitor structure proposed by the utility model.

[0021] Figure 5 This is a three-dimensional diagram of the pins of a film capacitor structure proposed by the utility model.

[0022] In the figure: 1. bottom plate; 2. support rod; 3. top plate; 4. fixing plate; 5. capacitor core; 6. rock wool membrane; 7. outer shell; 8. ventilation area; 9. wind shield; 10. air guide groove; 11. shunt groove; 12. conductive block; 13. pin; 14. lead wire; 15. conductive electrode; 16. air flow cavity. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the "one embodiment" or "embodiment" referred to herein refers to specific features, structures or characteristics that may be included in at least one implementation method of the present invention. The "in one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0026] Reference Figure 1 The utility model provides an embodiment: a film capacitor structure, including a bottom plate 1, a support rod 2 is fixedly installed on the top of the bottom plate 1, a top plate 3 is fixedly installed on the top of the support rod 2, a plurality of fixed plates 4 are fixedly installed on the outside of the support rod 2, a plurality of capacitor cores 5 are fixedly installed on the inner sides of two adjacent fixed plates 4, conductive blocks 12 are fixedly installed at both ends of the top of the top plate 3, pins 13 are fixedly installed at both ends of the bottom of the bottom plate 1, conductive electrodes 15 are fixedly installed at both ends of the inside of the conductive block 12, and a lead 14 is fixedly installed inside the pin 13; the device is set outside the external high-power device through the two conductive blocks 12 to perform capacitor work, and the high-power device is connected through the conductive electrode 15, and the capacitor core 5 performs capacitor work on the current, and the two pins 13 at the bottom are connected to the external insulation structure, and the lead 14 performs insulation work to prevent current leakage.

[0027] refer to Figure 1 The bottom plate 1 is located on the outside of the fixed plate 4 and is fixedly installed with a rock wool film 6. The top of the rock wool film 6 is fixedly installed on the bottom of the top plate 3. The bottom plate 1 is located on the outside of the rock wool film 6 and is fixedly installed with a shell 7. The top of the shell 7 is fixedly connected to the bottom of the top plate 3. Several ventilation places 8 are opened inside the shell 7. Several wind shields 9 are fixedly installed on the outside of the shell 7. The positions and quantities of the wind shields 9 and the ventilation places 8 are one-to-one corresponding. The inner side of the rock wool film 6 is fixedly connected to the outer sides of several fixed plates 4. The gaps between several capacitor cores 5 are filled with thermal conductive gel. A wind flow cavity 16 is set between the shell 7 and the rock wool film 6. When the capacitor is working, several capacitor cores 5 will generate heat. The thermal conductive gel and the rock wool film 6 absorb the heat emitted by the capacitor core 5 by virtue of their own high heat absorption. Then the wind shield 9 on the outside of the shell 7 blocks and intercepts the external flowing air. The flowing air enters the wind flow cavity 16 through the ventilation place 8, and absorbs and takes away the heat inside the rock wool film 6, thereby completing the heat dissipation of the capacitor.

[0028] refer to Figure 1 A plurality of air guide grooves 10 are provided on the inner side of the shell 7. The air guide grooves 10 are arranged in an annular pattern from top to bottom and are parallel to the bottom plate 1. A plurality of diversion grooves 11 are provided on the inner side of the shell 7. The diversion grooves 11 are located on the inner sides of two adjacent air guide grooves 10 and connect the two adjacent air guide grooves 10. After the external flowing air enters the air flow cavity 16, it will flow inside the air guide groove 10 and divert the flowing air inside the air guide groove 10 through the diversion grooves 11, so that more flowing air can enter the air flow cavity 16, thereby increasing the heat dissipation efficiency of the air to the rock wool membrane 6.

[0029] The working principle of the utility model is as follows: the device is arranged outside the external high-power device through two conductive blocks 12 to perform capacitor work, the conductive electrode 15 is used to connect with the high-power device, the internal capacitor core 5 performs capacitor work on the current, the two pins 13 at the bottom are connected to the external insulation structure, and the lead 14 performs insulation work to prevent the current from leaking out; when the capacitor performs capacitor work, a plurality of capacitor cores 5 will generate heat, and the thermal conductive gel and the rock wool film 6 absorb the heat emitted by the capacitor core 5 by virtue of their own high heat absorption, and then the wind shield 9 on the outside of the shell 7 blocks and intercepts the external flowing air, and the flowing air enters the air flow cavity 16 through the ventilation point 8, and absorbs and takes away the heat inside the rock wool film 6, completing the heat dissipation work of the capacitor; after the external flowing air enters the air flow cavity 16, it will flow inside the air guide groove 10, and the flowing air inside the air guide groove 10 will be diverted through the diversion groove 11, so that more flowing air can enter the air flow cavity 16, thereby increasing the heat dissipation efficiency of the air to the rock wool film 6.

[0030] The above content is a further detailed description of the utility model in combination with the specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A film capacitor structure, comprising a bottom plate (1), characterized in that: A support rod (2) is fixedly mounted on the top of the bottom plate (1), a top plate (3) is fixedly mounted on the top of the support rod (2), a plurality of fixed plates (4) are fixedly mounted on the outside of the support rod (2), a plurality of capacitor cores (5) are fixedly mounted on the inner sides of two adjacent fixed plates (4), a rock wool film (6) is fixedly mounted on the outside of the fixed plate (4) on the bottom plate (1), the top of the rock wool film (6) is fixedly mounted on the bottom of the top plate (3), a shell (7) is fixedly mounted on the outside of the rock wool film (6) on the bottom plate (1), the top of the shell (7) is fixedly connected to the bottom of the top plate (3), a plurality of ventilation openings (8) are opened inside the shell (7), a plurality of wind shields (9) are fixedly mounted on the outside of the shell (7), the positions and numbers of the wind shields (9) and the ventilation openings (8) are in one-to-one correspondence, conductive blocks (12) are fixedly mounted on both ends of the top of the top plate (3), and pins (13) are fixedly mounted on both ends of the bottom of the bottom plate (1).

2. A thin film capacitor structure according to claim 1, characterized in that: A plurality of air guide grooves (10) are provided on the inner side of the housing (7). The air guide grooves (10) are distributed in an annular pattern from top to bottom and are all parallel to the bottom plate (1).

3. A thin film capacitor structure according to claim 2, characterized in that: A plurality of flow-dividing grooves (11) are provided on the inner side of the outer shell (7), and the flow-dividing grooves (11) are located on the inner side of two adjacent air-guiding grooves (10) and penetrate the two adjacent air-guiding grooves (10).

4. A thin film capacitor structure according to claim 1, characterized in that: Conductive electrodes (15) are fixedly mounted at both ends of the conductive block (12).

5. A thin film capacitor structure according to claim 1, characterized in that: A lead wire (14) is fixedly mounted inside the pin (13).

6. A thin film capacitor structure according to claim 1, characterized in that: The inner side of the rock wool membrane (6) is fixedly connected to the outer sides of the plurality of fixed plates (4), and the gaps between the plurality of capacitor cores (5) are filled with thermally conductive gel.

7. A thin film capacitor structure according to claim 1, characterized in that: An air flow cavity (16) is provided between the outer shell (7) and the rock wool membrane (6).

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