A capacitor

Abstract

The utility model discloses a capacitor, including a shell, a capacitor core, a support, a busbar and a potting material; the shell has a housing cavity, which accommodates the capacitor core and the busbar; the potting material is filled in the housing cavity; the busbar leads electricity from the capacitor core, the busbar has a lead-out terminal suitable for connecting with an external terminal, the lead-out terminal passes through the potting material and has a welding part, and the welding part is parallel to the top surface of the potting material; the support has insulation and defines a support platform to abut the welding part, the support platform is provided with a hollow structure at the welding position corresponding to the welding part, and the bottom end of the support is buried in the potting material. The capacitor can support the lead-out terminal, which is convenient for laser welding and reduces the assembly cost of the capacitor.

Description

Technical Field

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

[0002] Capacitors are generally composed of capacitor core, lead electrodes (usually leads, welding pieces or busbars), packaging shell, filling resin, etc. In order to improve the efficiency of the system, it is necessary to reduce the inductance of the loop, and more and more capacitor lead terminals are connected by laser welding. The capacitor structure in the related technology requires support for the lead terminals during welding. The welding part of the lead terminals is above the capacitor, and the support requires the use of special tooling fixtures, which makes the operation difficult and increases the production cost. Utility Model Content

[0003] 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 that can support lead-out terminals to facilitate laser welding thereof while reducing the assembly cost of the capacitor.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a capacitor, which includes a shell, a capacitor core, a support, a busbar and a potting material;

[0005] The housing has a receiving cavity for accommodating the capacitor core and the busbar;

[0006] The potting material is filled in the containing cavity;

[0007] The busbar draws out electricity from the capacitor core, the busbar has a lead-out terminal suitable for connecting to an external terminal, the lead-out terminal passes through the potting material and has a welding portion, and the welding portion is parallel to the top surface of the potting material;

[0008] The support member is insulating and defines a support platform to abut against the welding portion. The support platform is provided with a hollow structure corresponding to the welding position of the welding portion. The bottom end of the support member is buried in the potting material.

[0009] According to a capacitor of the utility model, due to the setting of the support member, the support member is used to support the laser welding position of the lead terminal, and the support member is provided with a hollow structure corresponding to the welding position to avoid the welding position of the lead terminal. The bottom end of the support member is buried in the potting material, so that the support member is directly assembled on the capacitor, which can support the lead terminal, facilitate its laser welding, and reduce the assembly cost of the capacitor.

[0010] In addition, the capacitor proposed in the utility model may also have the following additional technical features:

[0011] Optionally, the support member is provided with an elastic structure in the supporting direction, and the elastic structure abuts against the busbar or the capacitor core to make the support platform close to the welding portion.

[0012] Specifically, the elastic structure is an elastic cantilever that is bent and extended obliquely downward from the bottom end of the support member, and the suspended end of the elastic cantilever abuts against the busbar or the capacitor core.

[0013] More specifically, a notch for causing elastic deformation of the elastic cantilever is provided on the side of the connection end between the elastic cantilever and the support member.

[0014] Furthermore, the elastic structure includes at least two elastic cantilevers spaced apart along the length direction of the support member.

[0015] Optionally, the top surface of the support member is concave to form a groove, the top surface and front and rear ends of the groove are open, and the bottom surface of the groove constructs the support platform.

[0016] Furthermore, the middle of the support platform is hollow to form the hollow structure.

[0017] Optionally, the supporting member is a plastic member. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a capacitor according to an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the cooperation between the busbar and the support member in an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the support member of an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of a support member from another perspective of an embodiment of the utility model.

[0022] Description of labels:

[0023] Shell 1, support member 2, support platform 21, hollow structure 211, elastic structure 22, notch 23, groove 24, connecting plate 25, busbar 3, lead terminal 31, welding part 311, potting material 4. 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] The following is combined with Figure 1-Figure 4 The capacitor according to the embodiment of the present utility model is described in detail.

[0027] like Figure 1 and Figure 2 As shown, a capacitor according to an embodiment of the utility model includes a housing 1, a capacitor core (not shown), a support 2, a busbar 3 and a potting material 4.

[0028] Specifically, the shell 1 has a accommodating cavity for accommodating the capacitor core and the busbar 3; the potting material 4 is filled in the accommodating cavity; the busbar 3 draws electricity from the capacitor core, and the busbar 3 has a lead-out terminal 31 suitable for connecting to an external terminal, the lead-out terminal 31 passes through the potting material 4 and has a welding portion 311, and the welding portion 311 is parallel to the top surface of the potting material 4; the support member 2 is insulating and defines a support platform 21 to abut the welding portion 311, and the support platform 21 is provided with a hollow structure 211 at the welding position corresponding to the welding portion 311, and the bottom end of the support member 2 is buried in the potting material 4.

[0029] That is to say, when the welding portion 311 of the lead-out terminal 31 is laser welded, an external force will be applied to the lead-out terminal, and the support platform 21 of the support member 2 will abut against the welding portion 311. The bottom end of the support member 2 is buried in the potting material 4 for positioning and fixing, so that the support member 2 can support the laser welding position of the welding portion 311, avoiding the need to use special tooling and fixtures, thereby reducing the difficulty of the operation; furthermore, the support member 2 is hollowed out at the welding position corresponding to the welding portion 311, which can avoid damage to the support member 2 during the welding process.

[0030] Therefore, according to a capacitor of the utility model, due to the setting of the support member 2, the support member 2 is used to support the laser welding position of the lead terminal 31, and the support member 2 is provided with a hollow structure 211 corresponding to the welding position to avoid the welding position of the lead terminal 31. The bottom end of the support member 2 is buried in the potting material 4, so that the support member 2 can be directly assembled on the capacitor, so that the lead terminal 31 can be supported, which is convenient for its laser welding and reduces the assembly cost of the capacitor.

[0031] Among them, when assembling the capacitor, several capacitor cores and a busbar can be assembled into one to form a capacitor element assembly, and then the capacitor element assembly is accommodated in the accommodating cavity of the shell 1, and then the support member 2 is assembled between the lead terminal of the busbar 3 and the busbar 3, and finally the potting material 4 is filled in the accommodating cavity of the shell 1. The potting material 4 can be a thermosetting resin, so that the bottom end of the support member 2 and the capacitor element assembly are buried in the potting material 4, and the components in the potting material 4 are positioned and fixed.

[0032] like Figure 2 As shown, the busbar 3 is formed by appropriately cutting and bending a conductive material such as a copper plate, and its lead terminal 31 is parallel to the top surface of the potting material 4 .

[0033] For the support member 2, the support member 2 is provided with an elastic structure 22 in the supporting direction, and the elastic structure 22 abuts against the busbar 3 or the capacitor core so that the support platform 21 is close to the welding portion 311. It can be understood that the elastic structure 22 is designed in the supporting direction (i.e., the vertical direction) to ensure that there is no gap between the support platform 21 and the welding portion 311, thereby playing a supporting role.

[0034] More specifically, combined with Figure 3 The elastic structure 22 is an elastic cantilever extending obliquely downward from the bottom end of the support member 2, and the suspended end of the elastic cantilever abuts against the busbar 3 or the capacitor core. The suspended end of the elastic cantilever can be horizontal to abut against the busbar 3 or the capacitor core.

[0035] Furthermore, a notch 23 for elastically deforming the elastic cantilever is provided on the side of the connection end between the elastic cantilever and the support member 2 .

[0036] In addition, the elastic structure 22 includes at least two elastic cantilevers spaced apart along the length direction of the support member 2, so as to provide a stable support.

[0037] For the support platform 21, the top surface of the support member 2 is concave to form a groove 24, the top surface and front and rear ends of the groove 24 are open, and the bottom surface of the groove 24 forms the support platform 21. In this way, the lead terminal 31 can be positioned and assembled better.

[0038] As for the hollow structure 211, the middle of the support platform 21 is hollowed out to form the hollow structure 211. Along the length direction of the support member 2, the hollow structure 211 runs through the entire support platform 21. The hollow structure 211 can prevent the support member 2 from being burned during welding.

[0039] Combination Figure 4 A connecting plate 25 may be provided below the hollow structure 211 of the support member 2 to ensure the strength of the support member 2 .

[0040] The support member 2 may be a plastic member, for example, a plastic member made of thermoplastic materials such as PPS, PC, PBT, etc.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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: Including shell, capacitor core, support, busbar and potting material; The housing has a receiving cavity for accommodating the capacitor core and the busbar; The potting material is filled in the containing cavity; The busbar draws out electricity from the capacitor core, the busbar has a lead-out terminal suitable for connecting to an external terminal, the lead-out terminal passes through the potting material and has a welding portion, and the welding portion is parallel to the top surface of the potting material; The support member is insulating and defines a support platform to abut against the welding portion. The support platform is provided with a hollow structure corresponding to the welding position of the welding portion. The bottom end of the support member is buried in the potting material.

2. The capacitor according to claim 1, wherein: The support member is provided with an elastic structure in the supporting direction, and the elastic structure abuts against the busbar or the capacitor core so that the support platform is closely attached to the welding portion.

3. The capacitor according to claim 2, characterized in that The elastic structure is an elastic cantilever that is bent and extended obliquely downward from the bottom end of the support member, and the suspended end of the elastic cantilever abuts against the busbar or the capacitor core.

4. The capacitor according to claim 3, characterized in that A notch is provided on the side of the connection end between the elastic cantilever and the support member for causing elastic deformation of the elastic cantilever.

5. The capacitor according to claim 3, wherein: The elastic structure includes at least two elastic cantilevers spaced apart along the length direction of the support member.

6. The capacitor according to claim 1, wherein: The top surface of the support member is concave to form a groove, the top surface and front and rear ends of the groove are open, and the bottom surface of the groove constructs the support platform.

7. The capacitor according to claim 6, characterized in that The hollow space in the middle of the support platform forms the hollow structure.

8. The capacitor according to claim 1, wherein: The supporting member is a plastic member.

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