Capacitor

Abstract

The utility model discloses a capacitor, which comprises a metal shell, a capacitor core, a busbar and an insulating part, the metal shell is provided with a containing cavity and an assembling part arranged on one side close to the containing cavity, and the assembling part and the containing cavity are integrally arranged and suitable for assembling the controller; the capacitor core is accommodated in the accommodating cavity, and the capacitor core is separated from the inner surface of the accommodating cavity through an insulating part; the busbar is connected with the capacitor core and is provided with a leading-out electrode extending out of the accommodating cavity, and the leading-out electrode extends towards the direction of the assembling part. The capacitor is good in heat dissipation effect, saves an assembly space which needs to be reserved between the controller and the capacitor, improves the volume ratio, and improves the assembly efficiency of the controller.

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 have been widely used in the field of new energy vehicles. As the automotive field continues to increase its requirements for power density and miniaturization, the requirements for the current resistance and volume ratio of film capacitors are increasing, and the film capacitors in related technologies are gradually unable to meet the requirements in design.

[0003] The film capacitor structure in the related art is generally composed of a capacitor core, lead electrodes, a packaging shell, and a filling resin. It has the following defects: The thermal conductivity of the plastic packaging shell is poor, generally around 1W / ℃*m 3 Within, when the current of the capacitor is large, the heat dissipation effect is poor; assembly space needs to be reserved between the capacitor and the controller, and the overall volume ratio is not high; it is not easy to assemble with the controller. 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 purpose of the utility model is to provide a capacitor with good heat dissipation effect, which saves the assembly space required to be reserved between the controller and the capacitor, improves the volume ratio, and improves the assembly efficiency of the controller.

[0005] To achieve the above-mentioned purpose, the embodiment of the utility model provides a capacitor, which includes a metal shell, a capacitor core, a busbar and an insulating member;

[0006] The metal shell has a receiving cavity and an assembly portion arranged on one side adjacent to the receiving cavity, wherein the assembly portion is integrally arranged with the receiving cavity and is suitable for assembling the controller;

[0007] The capacitor core is accommodated in the accommodation cavity, and the capacitor core is separated from the inner surface of the accommodation cavity by the insulating member;

[0008] The busbar is connected to the capacitor core and has a lead-out electrode extending out of the accommodation cavity, wherein the lead-out electrode extends toward a direction where the mounting portion is located.

[0009] According to a capacitor of an embodiment of the utility model, the high thermal conductivity of the metal shell is utilized to improve the heat dissipation effect of the capacitor, and the metal shell integrates the accommodating cavity and the assembly part, the assembly part is assembled with the controller, and the outside of the assembly part is usually provided with a water channel design, which can further improve the heat dissipation effect; the assembly part is integrated to the outside of the accommodating cavity of the capacitor, which can save the assembly space that needs to be reserved between the controller and the capacitor, improve the volume ratio, and improve the assembly efficiency of the controller.

[0010] 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.

[0011] Optionally, the assembly portion is in a plate shape, and one side of the assembly portion is connected to an outer side wall of the accommodating cavity and is adjacent to a bottom surface of the accommodating cavity.

[0012] Optionally, it further includes a reinforcing rib, which connects the outer side wall of the accommodating cavity and the assembly portion.

[0013] Optionally, the assembly portion is provided with an assembly hole and an assembly groove.

[0014] Optionally, the insulating member is insulating paper, insulating film, insulating glue, a blister molded part, an injection molded part or a plastic support base.

[0015] Optionally, the busbar has a first busbar and a second busbar, and end surface electrodes are formed on both end surfaces of the capacitor core. The first busbar is connected to one of the end surface electrodes, and the second busbar is connected to the other end surface electrode. The lead-out electrode of the first busbar and the lead-out electrode of the second busbar both extend in the direction of the assembly part.

[0016] Furthermore, the insulating member is provided between the first busbar and the second busbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a capacitor according to an embodiment of the utility model;

[0018] Figure 2 A three-dimensional diagram of a capacitor according to an embodiment of the utility model from another perspective;

[0019] Figure 3 An exploded view of a capacitor according to an embodiment of the present utility model;

[0020] Figure 4 It is a partial cross-sectional view of a capacitor involved in an embodiment of the utility model.

[0021] Description of labels:

[0022] The metal shell 100 , the accommodating cavity 110 , the assembly portion 120 , the assembly hole 121 , the assembly groove 122 , the reinforcing rib 130 , the capacitor core 200 , the busbar 300 , the lead-out electrode 301 , the insulating member 400 , and the filling resin 500 . DETAILED DESCRIPTION

[0023] 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.

[0024] The following is combined with Figure 1-Figure 4 The capacitor according to the embodiment of the present utility model is described in detail.

[0025] The capacitor according to the embodiment of the present invention includes a metal housing 100 , a capacitor core 200 , a busbar 300 and an insulating member 400 .

[0026] Specifically, the metal shell 100 has a housing cavity 110 and an assembly portion 120 disposed on one side adjacent to the housing cavity 110. The assembly portion 120 is integrally disposed with the housing cavity 110 and is suitable for assembling the controller; that is, compared with the combination structure of the controller and the capacitor in the related art, the capacitor adopts a metal shell, and an assembly portion 120 for assembling the controller is disposed on the metal shell 100, and the assembly portion 120 is integrally designed on the metal shell 100. The capacitor core 200 is accommodated in the housing cavity 110, and the capacitor core 200 is separated from the inner surface of the housing cavity 110 by an insulating member 400; that is, the insulating member 400 is disposed between the capacitor core 200 and the inner surface of the housing cavity 110 to ensure insulation performance. The busbar 300 is connected to the capacitor core 200 and has an extraction electrode 301 extending out of the housing cavity 110, and the extraction electrode 301 extends toward the direction where the assembly portion 120 is located.

[0027] Therefore, according to a capacitor of an embodiment of the utility model, the high thermal conductivity of the metal shell 100 is utilized to improve the heat dissipation effect of the capacitor, and the metal shell 100 integrates the accommodating cavity 110 and the assembly part 120, and the assembly part 120 is assembled with the controller, and the outside of the assembly part 120 is usually designed with a water channel, which can further improve the heat dissipation effect; the assembly part 120 is integrated into the outside of the accommodating cavity 110 of the capacitor, which can save the assembly space that needs to be reserved between the controller and the capacitor, thereby improving the volume ratio and improving the assembly efficiency of the controller.

[0028] 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.

[0029] Combination Figure 2For the metal housing 100, the assembly part 120 is in a plate shape, and one side of the assembly part 120 is connected to the outer wall of the accommodating cavity 110 and is adjacent to the bottom surface of the accommodating cavity 110. It can be understood that the assembly part 120 is parallel to the bottom surface of the accommodating cavity 110 as a whole, and the assembly part 120 is connected to the outer wall of the accommodating cavity 110 toward the side of the accommodating cavity 110; in this way, the assembly part 120 can be used to quickly assemble the controller and improve the heat dissipation effect of the capacitor.

[0030] The metal shell 100 may be an aluminum shell, which has a high thermal conductivity, generally about 100W / ℃*m 3 ~200W / ℃*m 3 In between, it can ensure that the capacitor has a better heat dissipation effect.

[0031] Furthermore, it also includes a reinforcing rib 130, which connects the outer wall of the accommodating cavity 110 and the assembly portion 120. Specifically, Figure 1 and Figure 2 As shown, reinforcing ribs 130 are provided on two opposite outer side walls of the accommodating cavity 110 and the outer side wall connected to the assembly portion 120 ; thus, the connection between the assembly portion 120 and the accommodating cavity 110 can be strengthened.

[0032] In addition, the assembly portion 120 is provided with an assembly hole 121 and an assembly groove 122 , so that the assembly portion 120 can be easily assembled to the controller.

[0033] As for the busbar 300, the busbar 300 has a first busbar 300a and a second busbar 300b, and both end surfaces of the capacitor core 200 are formed with end surface electrodes, the first busbar 300a is connected to one of the end surface electrodes, and the second busbar 300b is connected to the other end surface electrode, and the lead-out electrode 301 of the first busbar 300a and the lead-out electrode 301 of the second busbar 300b both extend toward the direction where the assembly part 120 is located. In this way, it is convenient to connect the lead-out electrode with the controller on the assembly part 120.

[0034] Then, the two busbars 300 are connected to a plurality of capacitor cores 200 and separated and insulated by insulating paper in the overlapping area, so as to assemble the two busbars 300, the plurality of capacitor cores 200 and the insulating paper into an integrated unit, and complete the capacitor element assembly. The capacitor element assembly is then accommodated in the accommodating cavity 110, and then the filling resin 500 in the liquid phase is injected from the open mouth of the accommodating cavity 110, so that the space between the capacitor element assembly and the inner surface of the accommodating cavity 110 is filled with the filling resin 500; if the filling resin 500 is injected, the filling resin 500 in the accommodating cavity 110 can be hardened, and the capacitor element assembly is fixed relative to the metal shell 100 by the hardened filling resin 500.

[0035] In addition, the insulating member 400 may be insulating paper, insulating film, insulating glue, blister / injection molded parts (PC, PPS, etc.) or a plastic support base (PA, PC, PPS, etc.).

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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: It includes metal shell, capacitor core, busbar and insulating parts; The metal shell has a receiving cavity and an assembly portion arranged on one side adjacent to the receiving cavity, wherein the assembly portion is integrally arranged with the receiving cavity and is suitable for assembling the controller; The capacitor core is accommodated in the accommodation cavity, and the capacitor core is separated from the inner surface of the accommodation cavity by the insulating member; The busbar is connected to the capacitor core and has a lead-out electrode extending out of the accommodation cavity, and the lead-out electrode extends toward the direction where the mounting portion is located.

2. The capacitor according to claim 1, wherein: The assembly portion is in a plate shape, and one side of the assembly portion is connected to the outer side wall of the accommodating cavity and is adjacent to the bottom surface of the accommodating cavity.

3. The capacitor according to claim 1, wherein: It also includes reinforcing ribs, which connect the outer side wall of the accommodating cavity and the assembly portion.

4. The capacitor according to claim 1, wherein The assembly part is provided with an assembly hole and an assembly groove.

5. The capacitor according to claim 1, wherein: The insulating part is insulating paper, insulating film, insulating glue, blister part, injection molded part or plastic support base.

6. The capacitor according to claim 1, wherein: The busbar has a first busbar and a second busbar, and end surface electrodes are formed on both end surfaces of the capacitor core. The first busbar is connected to one of the end surface electrodes, and the second busbar is connected to the other end surface electrode. The lead-out electrodes of the first busbar and the lead-out electrodes of the second busbar both extend in the direction of the assembly portion.

7. The capacitor according to claim 6, wherein: The insulating member is disposed between the first busbar and the second busbar.

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