A capacitor

Abstract

The utility model discloses a capacitor, including a packaging shell, a capacitor core, a sealant, an extraction electrode and a locking support; the capacitor core is arranged in the packaging shell; the sealant is encapsulated in the packaging shell to fix the capacitor core; the extraction electrode is connected to the capacitor core and is led out of the packaging shell; the locking support is fixed in the packaging shell, and the locking support extends from the inside of the packaging shell to the outside of the packaging shell. The utility model realizes the locking and fixing of the center position of the PCB circuit board and the IGBT component by setting a locking support structure, so that the PCB circuit board and the IGBT component will not be cracked due to excessive vibration amplitude.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors. Background Art

[0002] Metallized film capacitors are increasingly used in industrial control, new energy, automotive electronics, rail transit, power grids and other fields, and the volume ratio requirements for metallized film capacitors are also higher. In the related technology, metallized film capacitors include a packaging shell, a capacitor core, lead electrodes and sealants; the capacitor core includes a plate, a dielectric and a metal layer sprayed on the two end faces of the plate, and the capacitor core is arranged in the packaging shell; the sealant is encapsulated in the packaging shell to fix the capacitor core, and the sealant is usually epoxy resin; the lead electrode is connected to the capacitor core and led out of the packaging shell, and the lead electrode is generally a lead, a welding piece or a busbar.

[0003] In the prior art, the PCB circuit board and the IGBT assembly are generally locked to the controller housing to ensure the locking strength, and the capacitor is fixed on the PCB circuit board and the IGBT assembly. The locking position of the PCB circuit board and the IGBT assembly is generally located in a circle around the capacitor, which has the following problems: due to the large area of ​​the capacitor, the locking position of the PCB circuit board and the IGBT assembly avoids the capacitor, which easily leads to the lack of locking and fixing of the center position of the PCB circuit board and the IGBT assembly corresponding to the capacitor position, resulting in cracking of the PCB circuit board and the IGBT assembly device due to excessive amplitude during vibration. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent. To this end, one purpose of the utility model is to provide a capacitor, which can realize the locking and fixing of the center position of the PCB circuit board and the IGBT component by setting a locking support structure, so that the PCB circuit board and the IGBT component will not crack due to excessive vibration amplitude.

[0005] In order to achieve the above-mentioned object, the first embodiment of the utility model provides a capacitor, comprising:

[0006] Encapsulation shell;

[0007] A capacitor core, the capacitor core being disposed in the packaging housing;

[0008] A sealant, wherein the sealant is filled in the packaging shell to fix the capacitor core;

[0009] An extraction electrode, the extraction electrode is connected to the capacitor core and is extracted outside the packaging shell;

[0010] A locking support member is fixed in the packaging shell, and the locking support member extends from the inside of the packaging shell to the outside of the packaging shell.

[0011] According to a capacitor of an embodiment of the utility model, since the locking support is fixed in the packaging shell, the locking support extends from the inside of the packaging shell to the outside of the packaging shell, and the locking support can be used to be fixedly connected with the PCB circuit board and the IGBT component, so as to achieve locking and fixing of the center position of the PCB circuit board and the IGBT component, so that the PCB circuit board and the IGBT component will not crack due to excessive vibration amplitude.

[0012] In addition, a capacitor according to the above embodiment of the utility model may also have the following additional technical features:

[0013] Optionally, the locking support member includes a fixing frame and a supporting frame, the fixing frame is fixed in the packaging shell; the supporting frame is connected to the fixing frame, and the supporting frame extends outside the packaging shell.

[0014] Specifically, the fixing frame is fixed in the packaging shell by the sealant.

[0015] Specifically, the fixing frame is fixed between the capacitor core and the packaging shell.

[0016] Specifically, the fixing frame is configured in a square shape, and a connecting plate is provided on the diagonal line of the square fixing frame.

[0017] Furthermore, the four corners of the fixing frame are respectively connected to the supporting frame.

[0018] Specifically, the support frame is provided with a connection structure connected with a PCB circuit board and an IGBT component.

[0019] Furthermore, the connection structure is an internal threaded hole, a buckle or a positioning pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a capacitor according to an embodiment of the utility model;

[0021] Figure 2 A cross-sectional view of a capacitor according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the locking support member according to an embodiment of the utility model.

[0023] Description of symbols

[0024] The packaging shell 1, the lead-out electrode 2, the locking support 3, the fixing frame 31, and the supporting frame 32. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0027] like Figures 1 to 3 As shown, a capacitor according to an embodiment of the utility model includes a packaging shell 1, a capacitor core, a sealant, a lead electrode 2 and a locking support 3.

[0028] The capacitor core is arranged in the packaging shell 1. Optionally, the capacitor core is a metallized film capacitor core, which comprises a plate, a dielectric and a metal layer sprayed on two end surfaces of the plate; the packaging shell 1 can be a plastic shell or a metal shell.

[0029] The sealant is filled in the packaging shell 1 to fix the capacitor core. The sealant is usually epoxy resin.

[0030] The lead-out electrode 2 is connected to the capacitor core and led out of the package shell 1. Optionally, the lead-out electrode 2 includes a positive lead-out electrode and a negative lead-out electrode, the positive lead-out electrode is connected to one end of the capacitor core, and the negative lead-out electrode is connected to the other end of the capacitor core.

[0031] The locking support member 3 is fixed in the packaging shell 1 , and the locking support member 3 extends from the inside of the packaging shell 1 to the outside of the packaging shell 1 .

[0032] Optionally, the locking support member 3 includes a fixing frame 31 and a supporting frame 32, wherein the fixing frame 31 is fixed in the packaging shell 1; the supporting frame 32 is connected to the fixing frame 31, and the supporting frame 32 extends outside the packaging shell 1. Specifically, the fixing frame 31 can be fixed in the packaging shell 1 by the sealant, and of course, the fixing frame 31 can also be fixed between the capacitor core and the packaging shell 1. Figure 3The fixing frame 31 is set to be square, and the diagonal of the square fixing frame is provided with a connecting plate. The support frame 32 is provided with a connecting structure connected to the PCB circuit board and the IGBT component, and the connecting structure is an internal threaded hole, a buckle or a positioning pin. Further, the four corners of the fixing frame 31 are respectively connected to the support frame 32.

[0033] The support frame 32 can be made of metal nuts or bolts, and the material can be copper, stainless steel or other metals; it can also be a plastic part with a metal insert nut, and the plastic material can be PPS / PBT / PC, etc.; the shape can be cylindrical, square or polygonal, etc. The support frame 32 can be provided with embedded screws, self-tapping screws, buckles, positioning pins, etc. The fixing frame 31 can be provided with teeth and grooves to play the role of anti-rotation and anti-pullout.

[0034] A capacitor according to an embodiment of the utility model has a locking support 3 fixed in a packaging shell 1, and the locking support 3 extends from the inside of the packaging shell 1 to the outside of the packaging shell 1. The locking support 3 can be used to be fixedly connected with a PCB circuit board and an IGBT component, so as to achieve locking and fixing of the center position of the PCB circuit board and the IGBT component, so that the PCB circuit board and the IGBT component will not crack due to excessive vibration amplitude.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it 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 the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0040] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A capacitor, characterized in that: include: Encapsulation shell; A capacitor core, the capacitor core being disposed in the packaging housing; A sealant is poured into the packaging shell to fix the capacitor core; An extraction electrode, the extraction electrode is connected to the capacitor core and is extracted outside the packaging shell; A locking support member is fixed in the packaging shell, and the locking support member extends from the inside of the packaging shell to the outside of the packaging shell.

2. A capacitor according to claim 1, characterized in that: The locking support member includes a fixing frame and a supporting frame, wherein the fixing frame is fixed in the packaging shell; the supporting frame is connected to the fixing frame, and the supporting frame extends outside the packaging shell.

3. A capacitor according to claim 2, characterized in that: The fixing frame is fixed in the packaging shell by the sealant.

4. A capacitor according to claim 2, characterized in that: The fixing frame is fixed between the capacitor core and the packaging shell.

5. A capacitor according to claim 2, characterized in that: The fixing frame is arranged in a square shape, and a connecting plate is arranged on the diagonal line of the fixing frame.

6. A capacitor according to claim 5, characterized in that: The four corners of the fixing frame are respectively connected to the supporting frame.

7. A capacitor according to claim 2, characterized in that: The support frame is provided with a connection structure connected with a PCB circuit board and an IGBT component.

8. A capacitor according to claim 7, characterized in that: The connection structure is an internal threaded hole, a buckle or a positioning pin.

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