CN108063048B

CN108063048B - Busbar and capacitor with same

Info

Publication number: CN108063048B
Application number: CN201711338352.8A
Authority: CN
Inventors: 李波
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Xinyuan Electronics Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Xinyuan Electronics Co Ltd
Priority date: 2017-12-12
Filing date: 2017-12-12
Publication date: 2024-02-27
Anticipated expiration: 2037-12-12
Also published as: CN108063048A

Abstract

The invention provides a busbar and a capacitor with the busbar, wherein the busbar is made of plate-shaped conductive materials, and comprises: the body is provided with a first through hole; and the connecting unit is used for being connected with the capacitor element and connected with the side wall of the first through hole, and a gap is reserved between the connecting unit and the side wall of the first through hole. By the technical scheme provided by the invention, the problems of weak overcurrent capacity and poor heat dissipation performance of the capacitor in the prior art can be solved.

Description

Busbar and capacitor with same

Technical Field

The invention relates to the technical field of capacitors, in particular to a busbar and a capacitor with the busbar.

Background

The capacitor is generally connected with a plurality of capacitor elements in parallel to improve the capacity, the connecting medium adopted by the capacitor elements is multi-strand electronic wires or copper foils, the connecting medium and the capacitor elements cannot be fully contacted due to the limitation of the internal space and the structure, the contact area is small, the overcurrent capacity of the capacitor is weak, and the capacitor in the prior art is not easy to dissipate heat, so that the performance of the capacitor is affected.

Disclosure of Invention

The invention provides a busbar and a capacitor with the busbar, which are used for solving the problems of weak overcurrent capacity and poor heat dissipation performance of the capacitor in the prior art.

In order to solve the above problems, according to one aspect of the present invention, there is provided a busbar, which is a plate-shaped conductive material, comprising: the body is provided with a first through hole; and the connecting unit is used for being connected with the capacitor element and connected with the side wall of the first through hole, and a gap is reserved between the connecting unit and the side wall of the first through hole.

Further, the connection unit includes: the first ends of the first connecting pieces are respectively connected with the side walls of the first through holes, and the second ends of the first connecting pieces are mutually connected.

Further, the first connecting piece is of a bent strip-shaped structure, and the contact surface of the first connecting piece and the capacitive element is a plane.

Further, the connection unit further includes: and the second ends of the first connecting pieces are connected with each other through the second connecting pieces.

Further, the first through hole is a polygonal hole with a plurality of side walls, and the plurality of first connecting pieces are arranged in one-to-one correspondence with the plurality of side walls of the first through hole.

Further, the second connecting piece is provided with a second through hole, the second connecting piece is of a polygonal structure with a plurality of side walls, and the plurality of first connecting pieces and the plurality of side walls of the second connecting piece are arranged in one-to-one correspondence.

Further, the busbar is of an integrated hollow structure.

Further, the first through holes are multiple, the connecting units are multiple, and the first through holes are arranged in one-to-one correspondence with the connecting units.

Further, the plurality of connecting units are arranged on the body in a plurality of rows, and the body is also provided with an exhaust hole which is positioned between two adjacent rows of connecting units.

According to another aspect of the present invention, there is provided a capacitor including a capacitor element and a busbar, wherein the busbar is the busbar provided above, and one side of the capacitor element is connected to a connection unit of the busbar.

Further, the number of the capacitive elements is multiple, the number of the connecting units of the busbar is multiple, the number of the busbar is two, and the plurality of the capacitive elements are arranged between the two busbars in parallel.

Further, the busbar is of a rectangular structure, the side surfaces of the capacitive elements comprise two planes which are parallel to each other and a curved surface which is positioned between the two planes, the capacitive elements are arranged in a plurality of rows and columns, and in each row, the curved surfaces of two adjacent capacitive elements are abutted; and/or, in each column, the planes of two adjacent capacitive elements are abutted.

Further, the capacitor further includes: and the lead-out terminal is connected with the busbar.

Further, the capacitor further includes: the shell, the capacitor element and the busbar are arranged in the shell; and the filler is filled among the shell, the capacitor element and the busbar.

By applying the technical scheme of the invention, the connecting unit is arranged in the first through hole of the main body of the busbar, and the gap is arranged between the connecting unit and the side wall of the first through hole, and the connecting unit is easy to deform when being connected with the capacitive element due to the existence of the gap, so that the end face of the connecting unit can be matched with and fully contacted with the end face of the capacitive element, the contact area between the busbar and the capacitive element can be increased, the overcurrent capacity of the capacitor is improved, and the heat dissipation capacity of the capacitor can also be improved due to the existence of the gap.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a busbar provided by the invention;

FIG. 2 shows a partial enlarged view of the busbar of FIG. 1 in position A;

fig. 3 shows a front view of the busbar of fig. 1;

fig. 4 shows a schematic structural diagram of a capacitor provided by the present invention;

fig. 5 shows a front view of the capacitor of fig. 4;

fig. 6 shows a schematic structural view of the capacitor-containing case in fig. 4.

Wherein the above figures include the following reference numerals:

10. a body; 11. a gap; 12. an exhaust hole; 20. a connection unit; 21. a first connector; 22. a second connector; 100. a busbar; 200. a capacitive element; 300. a lead-out terminal; 400. a housing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 3, an embodiment of the present invention provides a busbar of plate-shaped conductive material, the busbar including a body 10 and a connection unit 20. Wherein, the body 10 is provided with a first through hole; the connection unit 20 is used for connecting with the capacitive element, the connection unit 20 is connected with the side wall of the first through hole, and a gap 11 is arranged between the connection unit 20 and the side wall of the first through hole.

By applying the technical scheme of the embodiment, the connecting unit 20 is arranged in the first through hole of the main body 10 of the busbar, the gap 11 is arranged between the connecting unit 20 and the side wall of the first through hole, and due to the existence of the gap 11, the connecting unit 20 is easy to deform when being connected with the capacitive element, and thus the end face of the connecting unit 20 can be matched with and fully contacted with the end face of the capacitive element, the contact area between the busbar and the capacitive element can be increased, so that the overcurrent capacity of the capacitor is improved, and due to the existence of the gap 11, the heat dissipation capacity of the capacitor can also be improved.

As shown in fig. 2, the connection unit 20 includes a plurality of first connection members 21, first ends of the plurality of first connection members 21 are connected to sidewalls of the first through holes, respectively, and second ends of the plurality of first connection members 21 are connected to each other. The contact area between the busbar and the capacitive element can be increased by the plurality of first connecting members 21, and the strength of the connecting unit 20 can be improved while the toughness of the connecting unit 20 is ensured.

In this embodiment, the first connecting member 21 may be configured in a curved strip-like structure, and the contact surface between the first connecting member 21 and the capacitive element is a plane. The contact surface of the first connecting piece 21 and the capacitive element is set to be a plane, so that the contact area with the capacitive element can be increased, and the first connecting piece 21 is set to be of a bent strip-shaped structure, so that the toughness of the first connecting piece 21 can be increased, and the first connecting piece 21 can be deformed to a certain extent during connection, so that the first connecting piece can be better contacted with the capacitive element, and the contact area with the capacitive element can be increased. This can improve the overcurrent capability of the capacitor, thereby improving the performance of the capacitor.

As shown in fig. 2, the connection unit 20 further includes a second connection member 22, and second ends of the plurality of first connection members 21 are connected to each other by the second connection member 22. By providing the second connecting member 22, the surface area of the connecting unit 20 can be increased, so that the contact area between the connecting unit 20 and the capacitive element can be increased on the one hand, and the structural strength of the connecting unit 20 can be increased on the other hand. Moreover, by providing a plurality of first and second connection members 21 and 22, when a part of the connection unit 20 is damaged or broken, the communication of the circuit can be ensured, and thus the reliability of the busbar can be improved.

Specifically, the first through hole is a polygonal hole having a plurality of sidewalls, and the plurality of first connectors 21 are disposed in one-to-one correspondence with the plurality of sidewalls of the first through hole. The first connectors 21 are distributed uniformly, so that the connecting units 20 can be deformed in different directions, and the adaptability of the connecting units 20 is improved. Moreover, the gaps 11 between two adjacent first connecting pieces 21 can be distributed uniformly, so that heat dissipation of the capacitor is facilitated. In this embodiment, the first through holes may be set to be square.

In the present embodiment, the second connecting member 22 has a second through hole, the second connecting member 22 has a polygonal structure with a plurality of sidewalls, and the plurality of first connecting members 21 are disposed in one-to-one correspondence with the plurality of sidewalls of the second connecting member 22. The second connector 22 is easily deformed by providing the second through hole, thereby facilitating contact with the capacitive element. The second connection member 22 is provided in a polygonal structure having a plurality of sidewalls, so that the second connection member 22 is connected with the plurality of first connection members 21, respectively.

In the present embodiment, the connection unit 20 can be connected to the capacitive element by welding, so that the connection strength of the two can be improved. Specifically, the second connector 22 may be soldered to connect with the capacitive element. Due to the provision of the second through hole, solder is facilitated to enter between the second connecting member 22 and the capacitive element, thereby enhancing the soldering strength of both and improving the reliability of the capacitor.

As shown in fig. 1 to 3, the busbar may be provided as an integral hollow structure. The arrangement can facilitate the manufacture of the busbar, improve the structural strength of the busbar and save materials. This can thus improve the performance of the busbar and reduce the manufacturing costs of the busbar. In this embodiment, the material of the busbar may be copper, so that the resistance may be reduced and the conductivity of the busbar may be improved.

Furthermore, the structure in which the plurality of connection units 20 are arranged in the same regular arrangement facilitates the realization of the press molding, thereby reducing the manufacturing cost of the busbar. In addition, when the connecting unit 20 is welded with the capacitive element, positioning of the welding point by the welding device is facilitated.

In this embodiment, the number of the first through holes is plural, and the number of the connection units 20 is plural, and the plurality of the first through holes are disposed in one-to-one correspondence with the plurality of connection units 20. By providing a plurality of connection units 20, a plurality of capacitor units can be connected using the same busbar, so that the arrangement can facilitate the parallel connection of the capacitor elements, thereby improving the capacity of the capacitor, and in addition, the compactness of the capacitor can be improved, thereby reducing the occupied space of the capacitor. In the present embodiment, one capacitive element may be connected to one connection unit 20, and may also be connected to a plurality of connection units 20.

Further, the busbar may be rectangular, and then a plurality of capacitance elements may be arranged in parallel on the busbar, which can result in a capacitor having a rectangular parallelepiped structure as a whole. Compared with a cylindrical capacitor, the capacitor with the cuboid structure is more compact and is easier to be matched with other parts, so that the capacitor is convenient to install in a limited space.

As shown in fig. 1 and 3, the plurality of connection units 20 are disposed on the body 10 in a plurality of columns, and the body 10 further has a vent hole 12, and the vent hole 12 is located between two adjacent columns of connection units 20. The plurality of connection units 20 are arranged on the body 10 in a plurality of rows, so that the processing of the busbar can be facilitated. In this embodiment, a material may be filled between adjacent capacitive elements to encapsulate the capacitor, which can improve the structural strength and stability of the capacitor. By providing the exhaust holes 12 between the adjacent two rows of the connection units 20, air between the adjacent capacitive elements can be exhausted at the time of filling the material, thereby improving the filling effect. The material to be filled may be a material that is cured by a chemical reaction, and if a gas is generated during the chemical reaction, the gas can be discharged to the outside through the gas discharge hole 12.

As shown in fig. 4 to 6, another embodiment of the present invention provides a capacitor including a capacitor element 200 and a busbar 100, wherein the busbar 100 is provided in the above embodiment, and one side of the capacitor element 200 is connected to a connection unit 20 of the busbar 100. By applying the technical scheme of the embodiment, the connecting unit 20 is arranged in the first through hole of the main body 10 of the busbar, the gap 11 is arranged between the connecting unit 20 and the side wall of the first through hole, and due to the existence of the gap 11, the connecting unit 20 is easy to deform when being connected with the capacitive element, and thus the end face of the connecting unit 20 can be matched with and fully contacted with the end face of the capacitive element, the contact area between the busbar and the capacitive element can be increased, so that the overcurrent capacity of the capacitor is improved, and due to the existence of the gap 11, the heat dissipation capacity of the capacitor can also be improved.

In the present embodiment, the number of the capacitor elements 200 is plural, the number of the connection units 20 of the busbar 100 is plural, the number of the busbar 100 is two, and the plurality of the capacitor elements 200 are arranged in parallel between the two busbars 100. This arrangement can increase the capacity of the capacitor and thus the performance of the capacitor.

In mass production, the capacitor element is inevitably error-prone in size, and the positions of the capacitor elements are not necessarily regular during installation, so that the connecting end faces of the capacitor elements are not on the same plane, and uneven problems are likely to occur. A plurality of flexible connection units 20 are arranged on the main body 10 of the busbar, and the connection of different capacitance elements and different connection units 20 can be realized by the deformation of the connection units during connection. Thus, the whole contact area between the capacitor element and the busbar can be increased, the ESR value is reduced, and the overcurrent capacity is increased. Therefore, the performance of the capacitor can be improved through the technical scheme of the embodiment.

Moreover, since the connection unit 20 has good ductility, the influence caused by the size error or the irregular arrangement of the capacitive elements can be compensated, so that the welding of the capacitive elements and the connection unit 20 can be conveniently realized, the automatic welding can be conveniently realized by using automatic equipment, the production efficiency is improved, and the production cost is reduced.

Specifically, the busbar 100 may be configured in a rectangular structure, and the side surfaces of the capacitive elements 200 include two planes parallel to each other and a curved surface located between the two planes, and the plurality of capacitive elements 200 are arranged in a plurality of rows and a plurality of columns. The curved surfaces of two adjacent capacitive elements 200 may be abutted in each row; it is also possible to abut the planes of two adjacent capacitive elements 200 in each column. This can improve the compactness of the capacitor. The capacity of the capacitor can be increased in the same space as compared with a cylindrical capacitor. And the capacitor can be arranged in a cuboid structure, so that the capacitor can be conveniently installed in a limited space.

As shown in fig. 4, the capacitor further includes a lead terminal 300, and the lead terminal 300 is connected to the busbar 100. By providing the lead-out terminal 300, connection of the capacitor with other components is facilitated. In the present embodiment, the lead terminal 300 may be directly fixed using a screw, so that the capacitor may be electrically connected to other components while the capacitor is fixed. In the present embodiment, the material of the lead-out terminal 300 may also be set to copper. To improve the performance of the capacitor, a layer of tin may be plated on the surface of the busbar 100 or the lead terminal 300.

In order to improve the reliability of the capacitor, in the present embodiment, the capacitor further includes a case 400 and a filler. The capacitor element 200 and the busbar 100 are disposed in the housing 400, and the filler is filled between the housing 400, the capacitor element 200 and the busbar 100. This firmly connects the plurality of capacitive elements together with the busbar by the filler and can be protected by the housing 400. Wherein the housing 400 may be provided in an injection molded structure, which facilitates the manufacture of the housing 400.

As shown in fig. 6, a plurality of protrusions are provided on the upper end surface of the housing 400, and the main board or other components can be supported by the protrusions, so that the different components can be matched with each other, and the structure is compact. The case 400 is further provided with reinforcing ribs on the side surface, so that the structural strength of the capacitor can be improved.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

Claims

1. A busbar of plate-like conductive material, the busbar comprising:

a body (10), wherein the body (10) is provided with a first through hole;

a connection unit (20) for connecting with a capacitive element, the connection unit (20) being connected with a side wall of the first through hole, a gap (11) being provided between the connection unit (20) and the side wall of the first through hole;

the connection unit (20) comprises: a plurality of first connecting pieces (21), wherein first ends of the first connecting pieces (21) are respectively connected with the side walls of the first through holes, and second ends of the first connecting pieces (21) are mutually connected; a second connecting member (22), second ends of the plurality of first connecting members (21) being connected to each other by the second connecting member (22);

the first through holes are polygonal holes with a plurality of side walls, and the plurality of first connecting pieces (21) are arranged in one-to-one correspondence with the plurality of side walls of the first through holes;

the second connecting piece (22) is provided with a second through hole, the second connecting piece (22) is of a polygonal structure with a plurality of side walls, and the first connecting pieces (21) and the side walls of the second connecting piece (22) are arranged in one-to-one correspondence.

2. Busbar according to claim 1, wherein the first connection element (21) has a curved strip-like structure, and the contact surface of the first connection element (21) with the capacitive element is a plane.

3. The busbar of claim 1, wherein the busbar is an integral hollowed-out structure.

4. The busbar according to claim 1, wherein the number of the first through holes is plural, the number of the connection units (20) is plural, and the plurality of the first through holes are arranged in one-to-one correspondence with the plurality of the connection units (20).

5. A busbar according to claim 3, wherein a plurality of said connection units (20) are arranged in a plurality of rows on said body (10), said body (10) further having a vent hole (12), said vent hole (12) being located between two adjacent rows of said connection units (20).

6. Capacitor comprising a capacitive element (200) and a busbar (100), characterized in that the busbar (100) is a busbar according to any one of claims 1 to 5, one side of the capacitive element (200) being connected to a connection unit (20) of the busbar (100).

7. The capacitor according to claim 6, wherein the number of the capacitive elements (200) is plural, the number of the connection units (20) of the busbar (100) is plural, the number of the busbar (100) is two, and the plurality of the capacitive elements (200) are arranged in parallel between the two busbars (100).

8. The capacitor according to claim 7, wherein the busbar (100) has a rectangular structure, the side surfaces of the capacitive elements (200) include two planes parallel to each other and a curved surface between the two planes, the plurality of capacitive elements (200) are arranged in a plurality of rows and a plurality of columns,

in each row, the curved surfaces of two adjacent capacitive elements (200) are abutted; and/or the number of the groups of groups,

in each column, the planes of two adjacent capacitive elements (200) are abutted.

9. The capacitor of claim 6, further comprising:

and a lead-out terminal (300) connected to the busbar (100).

10. The capacitor of claim 6, further comprising:

a housing (400), wherein the capacitive element (200) and the busbar (100) are both arranged in the housing (400);

and a filler filled between the case (400), the capacitor element (200), and the busbar (100).