Busbar structure of capacitor and capacitor
By designing multiple interval connection structures and partition marks on the busbar structure of the capacitor, the uniform flow of current and the uniform dispersion of heat are achieved, the problem of local overheating of the capacitor under high current is solved, and the heat dissipation effect of the capacitor is improved. Service life.
Patent Information
- Application Number
- CN202323539721.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-25
AI Technical Summary
Existing capacitors are prone to local heating when facing high currents, which is difficult to meet the working conditions, reducing the service life of the capacitor.
Design a busbar structure of a capacitor. By setting up multiple spaced connection structures on the capacitor terminal board, ensure that the input current flows evenly, avoid local overheating, and increase the heat dissipation area through the distribution of partition marks and connecting plates to achieve heat evenly dispersed.
It effectively improves the heat dissipation effect of the capacitor, extends the service life, and meets customers' needs for high current applications.
Smart Images
Figure CN222168167U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of capacitors, in particular to a busbar structure of a capacitor and 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 grid and other fields.
[0003] Currently, capacitors in the industry generally have one or more pairs of capacitor terminals, and each pair of capacitor terminals is connected to a counterpart. Usually, there is only a single connection port on a capacitor terminal. When encountering a large current value, it is easy to cause local heating, which is difficult to meet the customer's operating conditions and will reduce the service life of the capacitor. Utility Model Content
[0004] The utility model aims to provide a busbar structure of a capacitor and a capacitor, which have the advantage of good heat dissipation effect.
[0005] In order to achieve the above purpose, the solution of the utility model is:
[0006] A busbar structure of a capacitor, comprising a first busbar and a second busbar;
[0007] The first busbar and the second busbar each have a connection portion and at least one capacitor terminal plate;
[0008] The connection portion of the first busbar is used to connect to one end of the capacitor core located in the capacitor housing, and the connection portion of the second busbar is used to connect to the other end of the capacitor core;
[0009] The capacitor terminal plates of the first busbar and the second busbar both extend out of the housing and are spaced apart from each other;
[0010] The capacitor terminal plate is provided with more than two connection structures arranged at intervals.
[0011] Furthermore, the connection structure is a connection port or a connection column provided on the capacitor terminal.
[0012] Furthermore, a partition cut is provided between any two connection structures of the capacitor terminal plate, and the partition cut is perpendicular to the central connection line of adjacent connection structures.
[0013] Furthermore, the length of the partition cut is not less than the width of the connection structure in a direction parallel to the partition cut.
[0014] Furthermore, the connection structures on the capacitor terminal plate are distributed at linear intervals.
[0015] Furthermore, the capacitor terminal plate is in an "L" shape. The "L"-shaped capacitor terminal plate includes a horizontal plate and a vertical plate vertically connected to each other. More than two connecting structures are arranged side by side on the horizontal plate, and the vertical plates are connected to the connecting parts; the partition cut extends from the horizontal plate to the vertical plate.
[0016] Furthermore, each of the connection structures is distributed at intervals along the central circumference of the capacitor terminal plate; a connection plate protrudes between any two adjacent connection structures of the capacitor terminal plate and is connected to the connection portion.
[0017] Furthermore, the capacitor terminal plate is provided with more than three connection structures; and between adjacent connection structures, except for the position of the connection plate, there are partition cuts between the remaining adjacent connection structures.
[0018] A capacitor comprises a shell, a capacitor core and the busbar structure;
[0019] The capacitor core is arranged inside the housing;
[0020] The connecting parts of the first busbar and 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.
[0021] Furthermore, there are a plurality of capacitor cores; the top and bottom surfaces of each capacitor core in the shell are sprayed with gold.
[0022] After adopting the above technical solution, by setting two connection structures on the capacitor terminal board, each connection structure is connected to the same counterpart, so that the input current can be evenly distributed to avoid local overheating of the busbar. When there are more connection structures, the effect of current distribution can be increased accordingly, so that the heat can be evenly distributed to various parts of the capacitor terminal board, so that the capacitor can dissipate heat efficiently, meet customer needs, and increase service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a three-dimensional diagram of embodiment 1 of the utility model;
[0024] Figure 2 It is an exploded view of embodiment 1 of the utility model;
[0025] Figure 3 It is a three-dimensional diagram of embodiment 2 of the present utility model;
[0026] Figure 4 This is a three-dimensional diagram of the busbar structure of Example 2 of the utility model;
[0027] Figure 5 A three-dimensional diagram of a capacitor terminal plate according to Embodiment 3 of the present utility model;
[0028] Figure 6 This is a three-dimensional diagram of the busbar structure of Example 4 of the utility model;
[0029] Figure 7 It is a three-dimensional view of the busbar structure of Embodiment 4 of the present utility model from another angle;
[0030] Figure 8 It is a top view of the busbar structure of Example 4 of the utility model.
[0031] Explanation of reference numerals: housing 1, capacitor core 2, busbar structure 3, first busbar 31, second busbar 32, connecting portion 33, capacitor terminal plate 34, transverse plate 341, longitudinal plate 342, connecting plate 343, connecting structure 35, partition cut 36, center connecting line A, potting material 4. 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] Example 1
[0034] like Figure 1 and Figure 2 As shown, a capacitor of the utility model comprises a housing 1, a capacitor core 2 and a busbar structure 3.
[0035] The capacitor core 2 is arranged inside the housing 1 .
[0036] There can be multiple capacitor cores 2 ; the top and bottom surfaces of each capacitor core 2 in the housing 1 are sprayed with gold to connect with the busbar structure 3 .
[0037] The busbar structure 3 includes a first busbar 31 and a second busbar 32 .
[0038] The first busbar 31 and the second busbar 32 each have a connection portion 33 and at least one capacitor terminal plate 34 .
[0039] The connection portion 33 of the first busbar 31 is used to connect to one end of the capacitor core 2 located in the capacitor housing 1, and the connection portion 33 of the second busbar 32 is used to connect to the other end of the capacitor core 2. Specifically, the connection portions 33 of the first busbar 31 and the second busbar 32 are respectively connected to the bottom surface and the top surface of the capacitor core 2, and the housing 1 is filled with a potting material 4 such as resin.
[0040] The capacitor terminal plates 34 of the first busbar 31 and the second busbar 32 are both extended out of the housing 1 and are spaced apart from each other. The capacitor terminal plates 34 are provided with more than two spaced apart connection structures 35 , and this embodiment is described by taking two connection structures 35 as an example.
[0041] Thus, by providing two connection structures 35 on the capacitor terminal board 34, each connection structure 35 is connected to the same counterpart, so that the input current can be evenly distributed to avoid local overheating of the busbar. When there are more connection structures 35, the effect of current distribution can be increased accordingly, so that the heat can be evenly distributed to each area of the capacitor terminal board 34, so that the capacitor can dissipate heat efficiently and increase its service life.
[0042] In this embodiment, the connection structure 35 is a connection port provided on the capacitor terminal plate 34 , and the connection port may be a round hole, which may be connected to the counterpart by means of bolts.
[0043] Of course, the connection structure 35 can also be a connection column (not shown) protruding from the capacitor terminal plate 34, for example, it can be a bolt column or a blind hole nut. The blind hole nut can be provided with an opening on the bottom surface of the capacitor terminal plate 34, and the inner wall of the opening is an internal thread.
[0044] Example 2
[0045] like Figure 3 and Figure 4 As shown, the structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that, any two connection structures 35 of the capacitor terminal plate 34 of this embodiment, in this embodiment, are further provided with a partition cut 36 between two connection ports, and the partition cut 36 is perpendicular to the central connection line A of the adjacent connection structures 35. The partition cut 36 is provided to physically separate the two connection ports, which can ensure a better physical current sharing effect.
[0046] Furthermore, the partition cut 36 is a slender structure, and the length may be not less than the width of the connection structure 35 in the direction parallel to the partition cut 36, so as to ensure that the adjacent connection structures 35 are fully separated.
[0047] In this embodiment, the connection structures 35 on the capacitor terminal plate 34 are linearly spaced. The capacitor terminal plate 34 may be rectangular, and the central connection line A of each connection structure 35 may be parallel to the edge of the capacitor terminal plate 34 or to the diagonal of the capacitor terminal plate 34.
[0048] Example 3
[0049] like Figure 5As shown, the structure of this embodiment is a busbar structure 3, which is basically the same as the structure of the above-mentioned embodiment 2. This embodiment only shows a schematic diagram of the capacitor terminal board 34 of the busbar structure 3; the capacitor terminal board 34 of this embodiment can be "L"-shaped, which can increase the heat dissipation area; the "L"-shaped capacitor terminal board 34 includes a horizontal plate 341 and a vertical plate 342 that are vertically connected to each other, and four parallel connection structures 35 are arranged on the horizontal plate 341, which correspondingly have three partition cuts 36, and the vertical plate 342 is connected to the connection part 33; the partition cuts 36 extend from the horizontal plate 341 to the vertical plate 342.
[0050] Example 4
[0051] like Figures 6 to 8 As shown, the structure of this embodiment is a busbar structure 3, which is basically the same as the structure of the above-mentioned embodiment 1, except that the connection structures 35 on the capacitor terminal plate 34 can be distributed at intervals along the center circumference of the capacitor terminal plate 34; a connection plate 343 protrudes between any two adjacent connection structures 35 of the capacitor terminal plate 34 and is connected to the connection part 33.
[0052] Specifically, there are three connection structures 35 on the capacitor terminal board 34 of the first busbar 31 of this embodiment; the three connection structures 35 are distributed in a triangular shape with the center of the capacitor terminal board 34. Therefore, multiple connection ports can also be used to balance the current, thereby achieving a good heat dissipation effect and solving the problem of local overheating.
[0053] The bottom surface between two of the three connection structures 35 is the connection plate 343 , and a partition notch 36 may be provided between another connection structure 35 and the two connection structures 35 .
[0054] In this embodiment, the plurality of connecting structures 35 may be arranged in a triangular pattern or in a rectangular pattern, etc. Furthermore, three connecting structures 35 may be arranged on the capacitor terminal plate 34 of the second busbar 32 .
[0055] 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.
[0056] 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.
[0057] 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.
[0058] 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.
[0059] In addition, the present application provides examples of various specific processes and materials, but a person skilled in the art may be aware of the application of other processes and / or the use of other materials.
Claims
1. A busbar structure of a capacitor, characterized in that: including a first busbar and a second busbar; The first busbar and the second busbar each have a connection portion and at least one capacitor terminal plate; The connection portion of the first busbar is used to connect to one end of the capacitor core located in the capacitor housing, and the connection portion of the second busbar is used to connect to the other end of the capacitor core; The capacitor terminal plates of the first busbar and the second busbar both extend out of the housing and are spaced apart from each other; The capacitor terminal plate is provided with more than two connection structures arranged at intervals.
2. A busbar structure of a capacitor according to claim 1, characterized in that: The connection structure is a connection port or a connection column arranged on the capacitor terminal.
3. The busbar structure of a capacitor according to claim 1, characterized in that: A partition cut is provided between any two connection structures of the capacitor terminal plate, and the partition cut is perpendicular to the central connection line of the adjacent connection structures.
4. A busbar structure of a capacitor according to claim 3, characterized in that: The length of the partition cut is not less than the width of the connecting structure in a direction parallel to the partition cut.
5. The busbar structure of a capacitor according to claim 1, characterized in that: The connection structures on the capacitor terminal plate are distributed at linear intervals.
6. The busbar structure of a capacitor according to claim 3, characterized in that: The capacitor terminal plate is in an "L" shape, and the "L"-shaped capacitor terminal plate includes a horizontal plate and a vertical plate that are vertically connected to each other, and more than two connecting structures are arranged side by side on the horizontal plate, and the vertical plate connections are connected to the connecting parts; the partition cut extends from the horizontal plate to the vertical plate.
7. The busbar structure of a capacitor according to claim 1, characterized in that: The connection structures are distributed at intervals along the central circumference of the capacitor terminal plate; a connection plate protrudes between any two adjacent connection structures of the capacitor terminal plate and is connected to the connection part.
8. A busbar structure of a capacitor according to claim 7, characterized in that: The capacitor terminal plate is provided with more than three connection structures; between adjacent connection structures, except for the position of the connection plate, there are partition cuts between the remaining adjacent connection structures.
9. A capacitor, characterized in that: It comprises a housing, a capacitor core and a busbar structure according to any one of claims 1 to 8; The capacitor core is arranged inside the housing; The connecting parts of the first busbar and 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.
10. A capacitor according to claim 9, 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 sprayed with gold.