Capacitor

Abstract

The utility model discloses a capacitor, which comprises a shell, a capacitor core and a capacitor leading-out terminal, the shell is provided with an extension part; the capacitor core is arranged in the shell, and the capacitor core is fixed by encapsulating an insulating sealant in the shell; the capacitor leading-out terminal is connected with the capacitor core, the capacitor leading-out terminal extends out of the shell from the inside of the shell, and the part, extending out of the shell, of the capacitor leading-out terminal is wrapped by the extension part of the shell in an insulating manner. According to the utility model, the creepage / air gap between the capacitor leading-out terminal and other conductive devices can be increased, and the overcurrent capability of the capacitor leading-out terminal is not influenced.

Description

Technical Field

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

[0002] With the rapid development of power electronics technology, metallized film capacitors are increasingly used in industrial control, new energy, automotive electronics, rail transit, power grids and other fields. At the same time, the product performance requirements for metallized film capacitors are also getting higher and higher.

[0003] In the related art, the metallized film capacitor includes a housing 10, a capacitor core disposed in the housing, and a capacitor lead terminal 20 connected to the capacitor core and extending out of the housing 10. The housing 10 is filled with an insulating sealant to fix the capacitor core. The capacitor lead terminal 20 extends out of the side end or front end of the housing 10. An insulating partition is disposed between the positive and negative capacitor lead terminals to insulate them. Figure 1 and Figure 2 As shown, in order to increase the creepage / air gap between the capacitor lead terminal and other conductive devices 30, the size of the capacitor lead terminal is usually reduced, that is, the creepage / air gap between the capacitor lead terminal and other conductive devices is increased by reducing the size of the capacitor lead terminal. The defect is that the size of the capacitor lead terminal is reduced, resulting in a decrease in the current capacity; at the same time, the size of the capacitor lead terminal is reduced, so that the part of the capacitor lead terminal located inside the shell and the corresponding insulating material are relatively fragile and easily damaged in the logistics turnover process. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the above technology to at least a certain extent. To this end, the utility model aims to provide a capacitor to increase the creepage / air gap between the capacitor lead terminal and other conductive devices without affecting the overcurrent capacity of the capacitor lead terminal.

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

[0006] A housing, wherein the housing is provided with an extension portion;

[0007] A capacitor core, the capacitor core is placed in the housing, and the capacitor core is fixed by filling the housing with insulating sealant;

[0008] A capacitor lead terminal is connected to the capacitor core, the capacitor lead terminal extends from the inside of the shell to the outside of the shell, and the portion of the capacitor lead terminal extending outside the shell is insulated and wrapped by an extension portion of the shell.

[0009] According to a capacitor of an embodiment of the utility model, since the capacitor lead terminal is connected to the capacitor core and extends from the inside of the shell to the outside of the shell, the part of the capacitor lead terminal extending outside the shell is insulated and wrapped by the extended part of the shell, thereby increasing the creepage / air gap between the capacitor lead terminal and other conductive devices without reducing the size of the capacitor lead terminal, thereby not affecting the current carrying capacity of the capacitor lead terminal.

[0010] In addition, a capacitor according to the above embodiment of the utility model may also have the following additional technical features:

[0011] Optionally, the extension portion is formed on a side portion of the shell in a width direction, and a height of the extension portion is lower than a height of the shell.

[0012] Specifically, the capacitor lead-out terminal includes a positive capacitor lead-out terminal and a negative capacitor lead-out terminal, the positive capacitor lead-out terminal and the negative capacitor lead-out terminal extend from the side in the width direction of the shell to the extension portion, and are partially insulated and wrapped by the extension portion, and an insulating partition is arranged between the positive capacitor lead-out terminal and the negative capacitor lead-out terminal.

[0013] Furthermore, the extension part is integrally formed with the shell, and insulating sealant is filled in the extension part.

[0014] Optionally, the extension portion is formed at the front portion of the shell in the length direction.

[0015] Specifically, the capacitor lead-out terminal includes a positive capacitor lead-out terminal and a negative capacitor lead-out terminal, the positive capacitor lead-out terminal and the negative capacitor lead-out terminal extend from the front part in the length direction of the shell to the extension part, and are partially insulated and wrapped by the extension part, and an insulating partition is arranged between the positive capacitor lead-out terminal and the negative capacitor lead-out terminal.

[0016] Furthermore, the extension portion protrudes from the front of the shell, and the extension portion is configured as a U-shaped groove, and the positive capacitor lead-out terminal and the negative capacitor lead-out terminal are wrapped in the U-shaped groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a capacitor in the prior art;

[0018] Figure 2 is a side view of a capacitor in the prior art;

[0019] Figure 3 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0020] Figure 4 It is a side view of the first embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0022] Description of symbols

[0023] Housing 10 , capacitor lead-out terminal 20 , conductive component 30 , housing 1 , extension portion 11 , capacitor lead-out terminal 2 , conductive component 3 . DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] like Figure 3 and Figure 4 As shown, a capacitor according to the first embodiment of the utility model comprises a housing 1 , a capacitor core and a capacitor lead terminal 2 .

[0027] The housing 1 is provided with an extension portion 11; in this embodiment, optionally, the extension portion 11 is formed on the side of the housing 1 in the width direction, and the height of the extension portion 11 is lower than the height of the housing 1. Specifically, the extension portion 11 is integrally formed with the housing 1, and the extension portion 11 is filled with insulating sealant.

[0028] The capacitor core is placed in the housing 1 , and the capacitor core is fixed by filling the housing 1 with insulating sealant. The capacitor core is an existing conventional structure, and its specific structure is not described here.

[0029] The capacitor lead-out terminal 2 is connected to the capacitor core, and the capacitor lead-out terminal 2 extends from the inside of the shell 1 to the outside of the shell 1. The capacitor lead-out terminal 2 includes a positive capacitor lead-out terminal and a negative capacitor lead-out terminal. Optionally, the positive capacitor lead-out terminal and the negative capacitor lead-out terminal extend from the side of the shell 1 in the width direction to the extension part 11, and are partially insulated and wrapped by the extension part 11. An insulating partition is arranged between the positive capacitor lead-out terminal and the negative capacitor lead-out terminal. At the same time, the positive capacitor lead-out terminal and the negative capacitor lead-out terminal extend from the front of the shell 1 in the length direction to the outside of the shell 1.

[0030] In a capacitor of the first embodiment of the utility model, since the capacitor lead terminal 2 is connected to the capacitor core, the capacitor lead terminal 2 extends from the inside of the shell 1 to the outside of the shell 1, and the part of the capacitor lead terminal 2 extending outside the shell 1 is insulated and wrapped by the extension part 11 of the shell 1, thereby increasing the creepage / air gap between the capacitor lead terminal 2 and other conductive devices 3, and there is no need to reduce the size of the capacitor lead terminal 2, thereby not affecting the current carrying capacity of the capacitor lead terminal 2.

[0031] like Figure 5 As shown, a capacitor according to the second embodiment of the present utility model comprises a housing 1 , a capacitor core and a capacitor lead terminal 2 .

[0032] The housing 1 is provided with an extension portion 11 ; in this embodiment, optionally, the extension portion 11 is formed at the front portion of the housing 1 in the length direction.

[0033] The capacitor core is placed in the housing 1 , and the capacitor core is fixed by filling the housing 1 with insulating sealant. The capacitor core is an existing conventional structure, and its specific structure is not described here.

[0034] The capacitor lead-out terminal 2 is connected to the capacitor core, and the capacitor lead-out terminal 2 extends from the inside of the shell 1 to the outside of the shell 1. The capacitor lead-out terminal 2 includes a positive capacitor lead-out terminal and a negative capacitor lead-out terminal. Optionally, the positive capacitor lead-out terminal and the negative capacitor lead-out terminal extend from the front of the shell 1 in the length direction to the extension part 11, and are partially insulated and wrapped by the extension part 11. An insulating partition is arranged between the positive capacitor lead-out terminal and the negative capacitor lead-out terminal. At the same time, the positive capacitor lead-out terminal and the negative capacitor lead-out terminal extend from the side of the shell 1 in the width direction to the outside of the shell 1, and an insulating partition is arranged between the positive capacitor lead-out terminal and the negative capacitor lead-out terminal.

[0035] Furthermore, the extension portion 11 protrudes from the front of the housing 1 , and the extension portion 11 is configured as a U-shaped groove, and the positive capacitor lead-out terminal and the negative capacitor lead-out terminal are wrapped in the U-shaped groove.

[0036] In a capacitor of the second embodiment of the utility model, since the capacitor lead terminal 2 is connected to the capacitor core, the capacitor lead terminal 2 extends from the inside of the shell 1 to the outside of the shell 1, and the part of the capacitor lead terminal 2 extending outside the shell 1 is insulated and wrapped by the extension part 11 of the shell 1, thereby increasing the creepage / air gap between the capacitor lead terminal 2 and other conductive devices 3, and there is no need to reduce the size of the capacitor lead terminal 2, thereby not affecting the current carrying capacity of the capacitor lead terminal 2.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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: A housing, wherein the housing is provided with an extension portion; A capacitor core, the capacitor core is placed in the housing, and the capacitor core is fixed by filling the housing with insulating sealant; A capacitor lead terminal is connected to the capacitor core, the capacitor lead terminal extends from the inside of the shell to the outside of the shell, and the portion of the capacitor lead terminal extending outside the shell is insulated and wrapped by an extension portion of the shell.

2. A capacitor according to claim 1, characterized in that: The extension portion is formed at a side portion of the housing in a width direction, and a height of the extension portion is lower than a height of the housing.

3. A capacitor according to claim 2, characterized in that: The capacitor lead-out terminal includes a positive capacitor lead-out terminal and a negative capacitor lead-out terminal, the positive capacitor lead-out terminal and the negative capacitor lead-out terminal extend from the side in the width direction of the shell to the extension portion, and are partially insulated and wrapped by the extension portion, and an insulating partition is arranged between the positive capacitor lead-out terminal and the negative capacitor lead-out terminal.

4. A capacitor according to claim 3, characterized in that: The extension part is integrally formed with the shell, and insulating sealant is filled in the extension part.

5. A capacitor according to claim 1, characterized in that: The extension portion is formed at the front portion of the housing in the length direction.

6. A capacitor according to claim 5, characterized in that: The capacitor lead-out terminal includes a positive capacitor lead-out terminal and a negative capacitor lead-out terminal, which extend from the front of the shell in the length direction to the extension part and are partially insulated and wrapped by the extension part, and an insulating partition is arranged between the positive capacitor lead-out terminal and the negative capacitor lead-out terminal.

7. A capacitor according to claim 6, characterized in that: The extension portion protrudes from the front of the shell, and the extension portion is configured as a U-shaped groove, and the positive capacitor lead-out terminal and the negative capacitor lead-out terminal are wrapped in the U-shaped groove.

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