Capacitor

Abstract

The utility model discloses a capacitor which comprises a capacitor core, a first bus bar and a second bus bar. The first bus bar leads out power from the capacitor core, and the first bus bar is provided with a first lead-out end; a second bus bar that leads out power from the capacitor core and faces the first bus bar, the second bus bar having a second lead-out terminal; the first leading-out end and the second leading-out end respectively comprise a first overlapping area and a second overlapping area which are overlapped with each other through insulation paper; the edge of the second overlapping area is provided with burrs, and the burrs face the insulation paper or back to the insulation paper; when the burrs face the insulation paper, the edge of the first overlapping area and the burrs are staggered in the transverse direction, or the edge of the first overlapping area and the insulation paper are spaced in the longitudinal direction. The capacitor is simplest in design and capable of effectively reducing self-inductance of the capacitor, and insulating materials are prevented from being damaged by burrs of the leading-out end.

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 requirements for low self-inductance and insulation performance of capacitors are also getting higher and higher.

[0003] In the related technology, capacitors for this type of application are usually used. Figure 1-Figure 3 The design structure is a tightly fitting lead-out terminal with a thinner insulating material. This type of design is the simplest while ensuring the insulation performance, and can effectively reduce the self-inductance of the capacitor. However, it has the following defects: the stamping burrs naturally formed by the stamping process of the sheet metal are easily damaged by the stamping burrs of the second lead-out terminal when the lead-out terminals are closely attached. Figure 4 . Utility Model Content

[0004] 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, the utility model aims to provide a capacitor which can effectively reduce the self-inductance of the capacitor while being simple in design, and prevent the insulating material from being damaged by the burrs of the lead-out terminal.

[0005] To achieve the above-mentioned object, an embodiment of the utility model provides a capacitor, which includes a capacitor core, a first bus bar and a second bus bar;

[0006] The first bus bar draws power from the capacitor core, and the first bus bar has a first lead-out end;

[0007] The second bus bar draws power from the capacitor core and is opposite to the first bus bar, the second bus bar having a second lead end;

[0008] The first lead-out end and the second lead-out end respectively include a first overlapping area and a second overlapping area that overlap each other with insulating paper in between; the edge of the second overlapping area has burrs, and the burrs are facing the insulating paper or facing away from the insulating paper; when the burrs are facing the insulating paper, the edge of the first overlapping area is misaligned with the burrs in the lateral direction, or the edge of the first overlapping area is spaced apart from the insulating paper in the longitudinal direction.

[0009] According to a capacitor of an embodiment of the utility model, the stamping direction of the two lead-out ends is adjusted so that the stamping directions of the areas close to the lead-out ends are opposite, so that the stamping burrs of the lead-out ends are away from the insulating paper; or the other lead-out end corresponding to the lead-out end with the stamping burrs facing the insulating paper is processed to be displaced in the lateral direction or spaced in the longitudinal direction so that the insulating paper in the burr area is not subjected to force, thereby making the capacitor with the simplest design and effectively reducing the self-inductance of the capacitor, avoiding the insulation material from being damaged by the burrs of the lead-out ends.

[0010] The embodiment of the utility model further provides a capacitor, which includes a capacitor core, a first bus bar and a second bus bar;

[0011] The first bus bar draws power from the capacitor core, and the first bus bar has a first lead-out end;

[0012] The second bus bar draws power from the capacitor core and is opposite to the first bus bar, the second bus bar having a second lead end;

[0013] The first lead-out end and the second lead-out end respectively include a first overlapping area and a second overlapping area that overlap each other with insulating paper in between; the second overlapping area is pressed toward the edge of the insulating paper to form an avoidance gap.

[0014] According to a capacitor of an embodiment of the utility model, the burrs on the lead-out end are processed to prevent the burrs from contacting the insulating paper, so that the insulating paper in the burr area is not subjected to stress, thereby making the capacitor with the simplest design and effectively reducing the self-inductance of the capacitor, while preventing the insulating material from being damaged by the burrs on the lead-out end.

[0015] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a capacitor with closely fitting lead ends in the related art;

[0017] Figure 2 It is a front view of a capacitor with closely fitting lead ends in the related art;

[0018] Figure 3 for Figure 2 Middle GG section view;

[0019] Figure 4 for Figure 3 A partial enlarged view of

[0020] Figure 5 An exploded view of a capacitor with closely fitting lead ends in the related art;

[0021] Figure 6 A schematic diagram of a closely fitting area of ​​a lead-out terminal of a capacitor involved in the related art;

[0022] Figure 7 It is a schematic diagram of the closely fitting area of ​​the lead-out terminal of the capacitor involved in Embodiment 1 of the present utility model;

[0023] Figure 8 It is a schematic diagram of the closely fitting area of ​​the lead-out terminal of the capacitor involved in Embodiment 2 of the present utility model;

[0024] Fig. 9 It is a schematic diagram of the closely fitting area of ​​the lead-out terminal of the capacitor involved in Embodiment 3 of the present utility model;

[0025] Fig.10 It is a schematic diagram of the tightly fitting area of ​​the lead-out terminal of the capacitor involved in Example 4 of the present utility model.

[0026] Description of labels:

[0027] The capacitor core 100 , the first bus bar 200 , the first lead end 210 , the first overlap region 211 , the first avoidance gap 212 , the second bus bar 300 , the second lead end 310 , the second overlap region 311 , the second avoidance gap 312 , the housing 400 , the filling resin 500 , and the insulating paper 600 . DETAILED DESCRIPTION

[0028] 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.

[0029] The following is combined with Figure 1-Figure 10 The capacitor according to the embodiment of the present utility model is described in detail.

[0030] like Figure 5 and Figure 7-Figure 9 As shown, the capacitor according to the embodiment of the present invention includes a capacitor core 100 , a first bus bar 200 , a second bus bar 300 , a case 400 , and a filling resin 500 .

[0031] Specifically, the first busbar 200 draws electricity from the capacitor core 100, and the first busbar 200 has a first lead-out end 210; the second busbar 300 draws electricity from the capacitor core 100 and is opposite to the first busbar 200, and the second busbar 300 has a second lead-out end 310; the first lead-out end 210 and the second lead-out end 310 respectively include a first overlapping area 211 and a second overlapping area 311 that overlap each other via the insulating paper 600; the edge of the second overlapping area 311 has burrs, and the burrs are facing the insulating paper 600 or facing away from the insulating paper 600; when the burrs are facing the insulating paper 600, the edge of the first overlapping area 211 is misaligned with the burrs in the lateral direction, or the edge of the first overlapping area 211 is spaced apart from the insulating paper 600 in the longitudinal direction.

[0032] That is to say, compared with Figure 6 In the related art shown, the burrs on the edge of the second overlapping area 311 of the tightly fitted second lead-out terminal 310 will puncture the insulating paper 600. The present application processes the first overlapping area 211 or the second overlapping area 311 to avoid the lead-out terminal punching burrs from damaging the insulating paper 600.

[0033] Therefore, according to a capacitor of an embodiment of the utility model, the stamping direction of the two lead-out terminals is adjusted so that the stamping directions of the areas close to the lead-out terminals are opposite, so that the stamping burrs of the lead-out terminals are away from the insulating paper; or the other lead-out terminal corresponding to the lead-out terminal with the stamping burr facing the insulating paper is processed to be displaced in the lateral direction or spaced in the longitudinal direction, so that the insulating paper in the burr area is not subjected to force, thereby making the capacitor with the simplest design and effectively reducing the self-inductance of the capacitor, avoiding the insulation material from being damaged by the burrs of the lead-out terminals.

[0034] The above implementation is the most basic solution of this application, which can solve the problems raised in the background technology and achieve the purpose of this application. The following improves the above basic solution in many aspects to further improve its performance, thereby achieving better implementation effect.

[0035] Example 1

[0036] Combination Figure 7In the lead-out end that is closely attached to the insulating paper 600 in this embodiment, the burr of the first lead-out end 210 faces away from the insulating paper 600, and the burr of the second lead-out end 310 faces the insulating paper 600. The first overlap area 211 is partially thinned at the edge position facing the insulating paper 600 by a hardware mold to form a first avoidance gap 212; that is, the first overlap area 211 is pressed and sunk at the edge position facing the insulating paper 600 by a hardware mold, so that a gap is left between the insulating paper 600 and the first lead-out end 210, so that the insulating paper pierced by the burr of the second overlap area 211 is not subjected to force, and the insulating paper 600 in the overlap area is prevented from being supported by the first lead-out end 210, subjected to force when closely attached, and damaged by the burr of the second lead-out end 310. In this way, the capacitor can be designed to be the simplest and can effectively reduce the self-inductance of the capacitor, while preventing the insulating material from being damaged by the burr of the lead-out end.

[0037] Combination Figure 5 The other components of the capacitor of this embodiment adopt the structure of the prior art, such as two bus bars connected with a plurality of capacitor cores 100, and separated and insulated by insulating paper 600 in the overlapping area, so as to assemble the two bus bars, the plurality of capacitor cores 100 and the insulating paper 600 into an integrated body, and complete the capacitor element assembly. The capacitor element assembly is then accommodated in the accommodating cavity of the housing 400, and then the filling resin 500 in the liquid phase state is injected into the accommodating cavity from the opening of the housing 400, so that the space between the capacitor element assembly and the housing 400 is filled with the filling resin 500; if the filling resin 500 is injected, the filling resin 500 in the housing 400 can be hardened, and the capacitor element assembly is fixed relative to the housing 400 by the hardened filling resin 500.

[0038] Example 2

[0039] Combination Figure 8 In this embodiment, the lead-out terminal closely attached to the insulating paper 600 has the burr of the first lead-out terminal 210 facing away from the insulating paper 600, and the burr of the second lead-out terminal 310 facing the insulating paper 600, and the edge of the first overlap area 211 and the burr of the second overlap area 311 are offset in the lateral direction; that is, for the area where the lead-out terminal is close, if the size margin is sufficient, the relative position of the stamping burrs of the two lead-out terminals is changed; specifically, the assembly margin of the parts can be combined to make the second overlap area The burr of the domain 311 points to the second lead end 310 of the insulating paper 600 and is offset ≥0.5mm to the outside of the insulating paper 600, so that the insulating paper 600 pointed by the burr of the second overlapping area 211 is not subjected to force, thereby preventing the insulating paper 600 in the overlapping area from being supported by the first lead end 210, being subjected to force when pressed against, and being damaged by the burr of the second lead end 310. In this way, the capacitor can be designed in the simplest way and can effectively reduce the self-inductance of the capacitor, while preventing the insulating material from being damaged by the burr of the lead end.

[0040] Example 3

[0041] Combination Fig. 9 In the lead-out terminal that is closely attached to the insulating paper 600 in this embodiment, the burrs of the first lead-out terminal 210 are facing away from the insulating paper 600, and the burrs of the second lead-out terminal 310 are facing away from the insulating paper 600. That is to say, without special consideration, the stamping directions of the two lead-out terminals are adjusted so that the stamping directions of the areas close to the lead-out terminals are opposite, and the stamping burrs of the two lead-out terminals are away from the insulating paper 600, so as to avoid the insulating paper 600 in the laminated area being subjected to force and being damaged by the burrs of the second lead-out terminal 310. In this way, the capacitor can be designed in the simplest way and can effectively reduce the self-inductance of the capacitor, while preventing the insulating material from being damaged by the burrs of the lead-out terminals.

[0042] Example 4

[0043] Combination Fig.10 In this embodiment, the lead-out end that is tightly attached to the insulating paper 600 has a burr on the first lead-out end 210 facing away from the insulating paper 600, and a burr on the second lead-out end 310 facing the insulating paper 600. The second overlap area 311 is pressed at the edge of the insulating paper 600 by a hardware mold to form a second avoidance gap 312; that is, the burr on the second overlap area 311 facing the insulating paper 600 is pressed by a hardware mold to remove the burr, so as to prevent the burr on the second lead-out end 310 from piercing the insulating paper 600. In this way, the capacitor can be designed in the simplest way and can effectively reduce the self-inductance of the capacitor, while preventing the insulating material from being damaged by the burr on the lead-out end.

[0044] 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.

[0045] 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 "several" is two or more, unless otherwise clearly and specifically defined.

[0046] 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.

[0047] 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.

[0048] 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 several 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.

[0049] 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 a capacitor core, a first bus bar and a second bus bar; The first bus bar draws power from the capacitor core, the first bus bar having a first lead-out end; The second bus bar draws power from the capacitor core and is opposite to the first bus bar, the second bus bar having a second lead end; The first lead-out end and the second lead-out end respectively include a first overlapping area and a second overlapping area that overlap each other with insulating paper in between; the edge of the second overlapping area has burrs, and the burrs are facing the insulating paper or facing away from the insulating paper; when the burrs are facing the insulating paper, the edge of the first overlapping area is misaligned with the burrs in the lateral direction, or the edge of the first overlapping area is spaced apart from the insulating paper in the longitudinal direction.

2. The capacitor according to claim 1, wherein: The first overlapping area is partially thinned at an edge position toward the insulating paper to form an avoidance gap.

3. The capacitor according to claim 1, wherein: The burr of the second overlapping area is offset in the lateral direction relative to the edge of the first overlapping area by more than or equal to 0.5 mm.

4. The capacitor according to claim 1, wherein End surface electrodes are formed on both end surfaces of the capacitor core, the first bus bar is connected to one of the end surface electrodes, and the second bus bar is connected to the other end surface electrode.

5. The capacitor according to claim 1, wherein: The device further includes a housing and a filling resin. The housing accommodates the capacitor core, the first bus bar, and the second bus bar. The filling resin is filled in the housing.

6. A capacitor, characterized in that: including a capacitor core, a first bus bar and a second bus bar; The first bus bar draws power from the capacitor core, the first bus bar having a first lead-out end; The second bus bar draws power from the capacitor core and is opposite to the first bus bar, the second bus bar having a second lead end; The first lead-out end and the second lead-out end respectively include a first overlapping area and a second overlapping area that overlap each other with insulating paper in between; the second overlapping area is pressed toward the edge of the insulating paper to form an avoidance gap.

7. The capacitor according to claim 6, wherein: End surface electrodes are formed on both end surfaces of the capacitor core, the first bus bar is connected to one of the end surface electrodes, and the second bus bar is connected to the other end surface electrode.

8. The capacitor according to claim 6, wherein: The device further includes a housing and a filling resin. The housing accommodates the capacitor core, the first bus bar, and the second bus bar. The filling resin is filled in the housing.

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