Capacitor

Abstract

The utility model discloses a capacitor. A busbar structure comprises a first busbar and a second busbar. The first busbar comprises a first connecting part and a first end plate which are connected, the first connecting part is used for being connected with one end of a capacitor core, and the first end plate is provided with at least one first connecting column; the second busbar comprises a second connecting part and a second end plate which are connected, the second connecting part is used for being connected with the other end of the capacitor core, and the second end plate is provided with at least one second connecting column; the first end plate and the second end plate are respectively overlapped up and down, and insulation paper is arranged between the first end plate and the second end plate at intervals; the first connecting column and the second connecting column are respectively aligned up and down, the first connecting column is convexly arranged upwards, and the second connecting column is convexly arranged downwards. Therefore, due to the fact that the distance between the two poles of the first connecting column and the second connecting column is small and the overlapping area of the first end plate and the second end plate is large, the double advantages of small stray inductance value and low cost are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor. 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 electromagnetic interference problem of capacitors is becoming more and more prominent.

[0003] At present, the capacitor AC terminal design in the industry generally adopts through-hole design or flat plate design. The through-hole terminal design reserves space for fastener installation, and the distance between the positive and negative electrodes is large, resulting in high stray inductance value of the capacitor terminal and poor capacitor performance; the close-fitting flat plate design has a small distance between the electrodes, but the laser welding technology requirements are high, the equipment investment is large, and there is no economic advantage. Utility Model Content

[0004] The utility model aims to provide a capacitor having the advantages of low stray capacitance value and low cost.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A capacitor comprises a busbar structure mainly composed of a first busbar and a second busbar;

[0007] The first busbar comprises a first connecting portion and a first end plate connected to each other, the first connecting portion is used to connect to one end of a capacitor core located in a housing of the capacitor, and the first end plate extends out of the housing and is provided with at least one first connecting column;

[0008] The second busbar comprises a second connecting portion and a second end plate connected to each other, the second connecting portion is used to connect to the other end of the capacitor core located in the capacitor housing, the second end plate extends out of the housing and is provided with at least one second connecting column;

[0009] The first end plate and the second end plate are respectively overlapped and arranged up and down, and an insulating paper is arranged between the two;

[0010] The first connecting post and the second connecting post are respectively aligned with each other up and down, the first connecting post is protruded upward, and the second connecting post is protruded downward.

[0011] Furthermore, the first connecting column and the second connecting column are both bolts.

[0012] Furthermore, the bolts are made of steel or copper.

[0013] Furthermore, the first end plate is provided with more than two first connecting columns which are arranged at intervals; the second end plate is also provided with more than two second connecting columns which correspond one by one to the bottom of the first connecting columns respectively.

[0014] Further, the first busbar further includes a first bending portion, the first bending portion includes a first top plate and a first outer plate, the inner end of the first top plate is connected to the first connecting portion, the outer end of the first top plate is connected to the top end of the first outer plate, the first outer plate is located outside the shell and extends vertically downward, the inner end of the first end plate is connected to the lower edge of the first outer plate, and the outer end of the first end plate extends horizontally outward;

[0015] The second busbar also includes a second bending portion, the second bending portion includes a second top plate and a second outer plate, the inner end of the second top plate is connected to the second connecting portion, the outer end of the second top plate is connected to the top end of the second outer plate, the inner end of the second end plate is connected to the lower edge of the second outer plate, the second top plate and the second outer plate are attached to the inner side of the first top plate and the first outer plate with insulating paper in between, and the outer end of the second end plate extends horizontally outward and is located below the first end plate.

[0016] Furthermore, the first bending portion further includes a first vertical plate, the lower end of the first vertical plate is connected to the side of the first connecting portion, and the upper end of the first vertical plate is connected to the inner end of the first top plate;

[0017] The second bending portion further includes a second vertical plate, the lower end of the second vertical plate is connected to the side of the second connecting portion, and the upper end of the second vertical plate is connected to the inner end of the second top plate;

[0018] The second vertical plate is partially in contact with the first vertical plate, and the overlapping portion of the two is also separated by insulating paper.

[0019] Further, it includes a housing, a capacitor core and the busbar structure;

[0020] The capacitor core is arranged inside the housing;

[0021] The first connection portion of the first busbar and the second connection portion of the second busbar are respectively connected to the bottom surface and the top surface of the capacitor core, and a potting material is poured into the shell.

[0022] Furthermore, there are a plurality of capacitor cores; the top surface and the bottom surface of each capacitor core in the shell are respectively sprayed with gold.

[0023] After adopting the above technical solution, the first connecting column and the second connecting column can be two AC terminals. Since the first connecting column and the second connecting column are aligned vertically for connection to the counterpart, the distance between the two poles is small, and the first end plate and the second end plate overlap vertically, and the overlapping area is large, which has the advantage of small stray inductance value; at the same time, the first connecting column and the second connecting column can be conveniently connected to the counterpart without laser welding, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the busbar structure of an embodiment of the utility model;

[0025] Figure 2 Another stereoscopic diagram of the busbar structure of an embodiment of the utility model;

[0026] Figure 3 A top view of the busbar structure of an embodiment of the utility model;

[0027] Figure 4 This is an exploded view of the busbar structure of an embodiment of the utility model;

[0028] Figure 5 It is a side view of the busbar structure of an embodiment of the utility model;

[0029] Figure 6 A three-dimensional diagram of a capacitor according to an embodiment of the present utility model;

[0030] Figure 7 This is an exploded view of a capacitor according to an embodiment of the present invention.

[0031] Explanation of reference numerals: busbar structure 10, first busbar 11, first connecting portion 111, first end plate 112, first connecting column 113, first bending portion 114, first vertical plate 1141, first top plate 1142, first outer plate 1143, second busbar 12, second connecting portion 121, second end plate 122, second connecting column 123, second bending portion 124, second vertical plate 1241, second top plate 1242, second outer plate 1243, insulating paper 13; shell 20, capacitor core 30. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] like Figures 1 to 5 As shown, a capacitor of the utility model includes a busbar structure 10, and the busbar structure 10 includes a first busbar 11 and a second busbar 12;

[0034] The first busbar 11 includes a first connecting portion 111 and a first end plate 112 connected to each other, the first connecting portion 111 is used to connect to one end of the capacitor core located in the capacitor housing, and the first end plate 112 extends out of the housing and is provided with at least one first connecting column 113;

[0035] The second busbar 12 comprises a second connecting portion 121 and a second end plate 122 connected to each other, the second connecting portion 121 is used to connect to the other end of the capacitor core located in the capacitor housing, the second end plate 122 extends out of the housing and is provided with at least one second connecting column 123;

[0036] The first end plate 112 and the second end plate 122 are respectively overlapped and arranged up and down, and an insulating paper 13 is arranged between the two;

[0037] The first connecting post 113 and the second connecting post 123 are respectively aligned with each other up and down, the first connecting post 113 is protruded upward, and the second connecting post 123 is protruded downward.

[0038] Thereby, the first connecting column 113 and the second connecting column 123 can be two AC terminals. Since the first connecting column 113 and the second connecting column 123 are aligned up and down for connection to the counterpart, the distance between the two poles is small, and the first end plate 112 and the second end plate 122 overlap up and down, and the overlapping area is large, which has the advantage of small stray inductance value; at the same time, the first connecting column 113 and the second connecting column 123 can be conveniently connected to the counterpart without laser welding, and the cost is low.

[0039] In this embodiment, the first connecting column 113 and the second connecting column 123 are both bolts, and the bolts can be made of conductive materials such as steel and copper, so as to be screwed and locked with the counterpart more quickly and conveniently.

[0040] The first end plate 112 is provided with two or more first connection pillars 113 arranged at intervals; the second end plate 122 is also provided with two or more second connection pillars 123, which correspond one by one to the bottom of the first connection pillars 113. In this embodiment, six first connection pillars 113 and six second connection pillars 123 are provided.

[0041] In this embodiment, the first busbar 11 also includes a first bending portion 114, and the first bending portion 114 includes a first vertical plate 1141, a first top plate 1142 and a first outer plate 1143. The lower end of the first vertical plate 1141 is connected to the side of the first connecting portion 111, and the upper end of the first vertical plate 1141 is connected to the inner end of the first top plate 1142; the outer end of the first top plate 1142 is connected to the top end of the first outer plate 1143, the first outer plate 1143 is located outside the shell and extends vertically downward, the inner end of the first end plate 112 is connected to the lower edge of the first outer plate 1143, and the outer end of the first end plate 112 extends horizontally outward.

[0042] The second busbar 12 also includes a second bending portion 124, which includes a second vertical plate 1241, a second top plate 1242 and a second outer plate 1243. The lower end of the second vertical plate 1241 is connected to the side of the second connecting portion 121, the upper end of the second vertical plate 1241 is connected to the inner end of the second top plate 1242, the outer end of the second top plate 1242 is connected to the top of the second outer plate 1243, the inner end of the second end plate 122 is connected to the lower edge of the second outer plate 1243, and the outer end of the second end plate 122 extends horizontally outward and is located below the first end plate 112.

[0043] Since the first connecting part 111 and the second connecting part 121 are arranged with an upper and lower interval, the corresponding second vertical plate 1241 is partially in contact with the first vertical plate 1141, and the overlapping part of the two is separated by the insulating paper 13; and the second top plate 1242 and the second outer plate 1243 are also in contact with the inner sides of the first top plate 1142 and the first outer plate 1143 with the insulating paper 13 in between.

[0044] Therefore, the first outer plate 1143 and the second outer plate 1243 respectively connected to the first end plate 112 and the second end plate 122 are two straight plates overlapping each other and located outside the shell, which can also further reduce the stray inductance value.

[0045] See also Figure 6 and Figure 7 The utility model also provides a capacitor, including a housing 20, a capacitor core 30 and the busbar structure 10.

[0046] The capacitor core 30 is disposed inside the housing 20. There can be multiple capacitor cores 30, and the capacitor core 30 can be made by winding a metalized film, heat treating, hot pressing, and gold spraying. The top and bottom surfaces of each capacitor core 30 in the housing 20 are respectively gold sprayed.

[0047] The first connection portion 111 of the first busbar 11 and the second connection portion 121 of the second busbar 12 are respectively connected to the bottom surface and the top surface of the capacitor core 30 , and the housing 20 is filled with a potting material such as resin.

[0048] Thus, the capacitor using the busbar structure 10 can have the advantages of low stray capacitance and low cost.

[0049] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0050] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0051] In addition, the terms "first", "second", "third", etc. 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" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0052] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connected" 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, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected 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 this application can be understood according to specific circumstances.

Claims

1. A capacitor, characterized in that: It includes a busbar structure mainly composed of a first busbar and a second busbar; The first busbar comprises a first connecting portion and a first end plate connected to each other, the first connecting portion is used to connect to one end of a capacitor core located in a housing of the capacitor, and the first end plate extends out of the housing and is provided with at least one first connecting column; The second busbar comprises a second connecting portion and a second end plate connected to each other, the second connecting portion is used to connect to the other end of the capacitor core located in the capacitor housing, the second end plate extends out of the housing and is provided with at least one second connecting column; The first end plate and the second end plate are respectively overlapped and arranged up and down, and an insulating paper is arranged between the two; The first connecting post and the second connecting post are respectively aligned with each other up and down, the first connecting post is protruded upward, and the second connecting post is protruded downward.

2. A capacitor according to claim 1, characterized in that: The first connecting column and the second connecting column are both bolts.

3. A capacitor according to claim 2, characterized in that: The bolts are made of steel or copper.

4. A capacitor according to claim 1, characterized in that: The first end plate is provided with more than two first connecting columns which are arranged at intervals; the second end plate is also provided with more than two second connecting columns which correspond one by one to the bottom of the first connecting columns respectively.

5. A capacitor according to claim 1, characterized in that: The first busbar further includes a first bending portion, the first bending portion includes a first top plate and a first outer plate, the inner end of the first top plate is connected to the first connecting portion, the outer end of the first top plate is connected to the top end of the first outer plate, the first outer plate is located outside the shell and extends vertically downward, the inner end of the first end plate is connected to the lower edge of the first outer plate, and the outer end of the first end plate extends horizontally outward; The second busbar also includes a second bending portion, the second bending portion includes a second top plate and a second outer plate, the inner end of the second top plate is connected to the second connecting portion, the outer end of the second top plate is connected to the top end of the second outer plate, the inner end of the second end plate is connected to the lower edge of the second outer plate, the second top plate and the second outer plate are attached to the inner side of the first top plate and the first outer plate with insulating paper in between, and the outer end of the second end plate extends horizontally outward and is located below the first end plate.

6. A capacitor according to claim 5, characterized in that: The first bending portion further includes a first vertical plate, the lower end of the first vertical plate is connected to the side of the first connecting portion, and the upper end of the first vertical plate is connected to the inner end of the first top plate; The second bending portion further includes a second vertical plate, the lower end of the second vertical plate is connected to the side of the second connecting portion, and the upper end of the second vertical plate is connected to the inner end of the second top plate; The second vertical plate is partially in contact with the first vertical plate, and the overlapping portion of the two is also separated by insulating paper.

7. A capacitor according to claim 1, characterized in that: It includes a shell, a capacitor core and the busbar structure; The capacitor core is arranged inside the housing; The first connection portion of the first busbar and the second connection portion of the second busbar are respectively connected to the bottom surface and the top surface of the capacitor core, and a potting material is poured into the shell.

8. A capacitor according to claim 7, characterized in that: There are a plurality of capacitor cores; the top surface and the bottom surface of each capacitor core in the shell are respectively subjected to gold spraying treatment.

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