Capacitor

Abstract

The utility model discloses a capacitor, which comprises a shell, an insulating part and a leading-out terminal, the shell is a metal controller box body, and an accommodating cavity of the shell is used as a capacitor encapsulation cavity; the insulating part is in interference fit with the interior of the opening so as to seal the opening, and is provided with a mounting hole; the leading-out terminal is in interference fit with the interior of the mounting hole so as to achieve the sealing of the mounting hole. According to the utility model, the metal controller box body is directly used as a capacitor encapsulation cavity, and the leading-out terminal of the capacitor is led out from the metal shell through the wall, so that the leading-out path of the leading-out terminal is reduced, and the overall structure not only can reduce the volume of the capacitor, but also can improve the power density of electric control, and meets the design requirements of products; and the insulating part is in interference fit with the shell and the leading-out terminal, so that glue leakage during glue pouring can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor with a metal controller box directly serving as a capacitor potting cavity. Background Art

[0002] In new energy motor control, busbar capacitors have disadvantages such as large size and heavy weight, which are the biggest obstacle to the miniaturization of electronic control. It is necessary to arrange good capacitor lead terminals and packaging structure to effectively reduce the size of the capacitor and achieve high power density of the electronic control.

[0003] In the prior art, the lead-out terminal of a capacitor is usually led out from the opening edge of a cylindrical capacitor casing and bent in a specific direction according to the requirements of the connection terminal. When the connection terminal requires that the electrical contact surface of the lead-out terminal be parallel to the side of the casing, the lead-out terminal must be bent to be parallel to the side of the casing, that is, folded 180°. This will reduce the power density of the capacitor and cannot meet product requirements. Utility Model Content

[0004] The purpose of the utility model is to provide a capacitor to solve the problems existing in the prior art and to directly use the metal controller box as the capacitor potting cavity, which is beneficial to reducing the capacitor volume and improving the power density of the electronic control.

[0005] In order to achieve the above objectives, the solution of the present invention is:

[0006] A capacitor comprises a housing, an insulating member and lead terminals; the housing is a metal controller box whose cavity serves as a capacitor potting cavity; the insulating member is interference-fitted within the opening to achieve sealing of the opening, and is provided with a mounting hole; the lead terminals are interference-fitted within the mounting hole to achieve sealing of the mounting hole.

[0007] The opening is opened on the side of the cavity and extends upward until it reaches the edge of the upper surface of the shell, and the two side walls and bottom wall of the opening are provided with limiting grooves, and the left and right sides and bottom edge of the insulating part are respectively interference fit in the corresponding limiting grooves.

[0008] The insulating member is a plastic member.

[0009] Elastic materials are provided between the matching surfaces of the insulating member and the opening, and between the matching surfaces of the insulating member and the lead-out terminal.

[0010] Preferably, the elastic material is silicone or rubber, and is integrally formed with the insulating member by a double-shot injection molding or secondary encapsulation process.

[0011] The insulating member includes a first insulating member, and the lead terminal includes a first terminal; the first insulating member is provided with a first mounting hole; the first terminal is a columnar member and is interference fit in the first mounting hole, and the first terminal is provided with a first connecting hole whose axis is perpendicular to the side of the shell.

[0012] Preferably, the side surface of the first insulating member extends in a horizontal direction to form a protrusion, and the first mounting hole passes through the protrusion.

[0013] The insulating member includes a second insulating member, and the lead terminal includes a second terminal; the second insulating member is provided with a second mounting hole; the second terminal is a sheet-shaped member and is interference fit in the second mounting hole, and the second terminal is provided with a second connecting hole whose axis is parallel to the side of the shell.

[0014] Preferably, a groove is provided at a position of the second insulating member below the second connecting hole, a nut is embedded in the groove, and the nut is coaxially arranged with the second connecting hole.

[0015] After adopting the above technical solution, the utility model has the following technical effects:

[0016] The utility model uses a metal controller box directly as the capacitor potting cavity, and leads the capacitor lead terminals from the metal shell "through the wall", thereby reducing the lead-out path of the lead terminals. The overall structure can not only reduce the capacitor volume, but also improve the power density of the electronic control, meeting the product design requirements; the insulating parts and the shell and the lead terminals are all interference fit, which can prevent glue leakage during glue pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall three-dimensional diagram of a specific embodiment of the utility model;

[0018] Figure 2 A perspective view of a housing according to a specific embodiment of the present invention;

[0019] Figure 3 This is a three-dimensional diagram of a first insulating member according to a specific embodiment of the present utility model;

[0020] Figure 4 This is a three-dimensional diagram of a second insulating member according to a specific embodiment of the present invention;

[0021] Figure 5 for Figure 1 A top view of

[0022] Figure 6 for Figure 5 Cross-sectional view in the AA direction;

[0023] Figure 7 for Figure 5Cross-sectional view in the middle BB direction;

[0024] Description of Figure Numbers:

[0025] 1-housing; 11-cavity; 12-opening; 13-limiting groove;

[0026] 2- Elastic material

[0027] 3-first insulating member; 31-first mounting hole; 32-bump;

[0028] 4-first terminal; 41-first connection hole;

[0029] 5-second insulating member; 51-second mounting hole; 52-groove;

[0030] 6-second terminal; 61-second connection hole;

[0031] 7-Nut. DETAILED DESCRIPTION

[0032] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0033] refer to Figure 1-7 As shown, the utility model discloses a capacitor, comprising a housing 1, an insulating member and lead terminals;

[0034] The housing 1 is a metal controller box, and its cavity 11 is used as a capacitor potting cavity for filling a filler such as epoxy resin; an opening 12 is provided on the side of the cavity 11;

[0035] The insulating member is interference-fitted in the opening 12 to achieve sealing of the opening 12, thereby preventing glue leakage during glue pouring, and is provided with a mounting hole;

[0036] The lead terminal is interference-fitted in the mounting hole to achieve sealing of the mounting hole, thereby preventing glue leakage during glue pouring.

[0037] Through the above scheme, the utility model uses the metal controller box directly as the capacitor potting cavity, and leads the lead terminals of the capacitor "through the wall" from the metal shell, thereby reducing the lead-out path of the lead terminals. The overall structure can not only reduce the capacitor volume, but also improve the power density of the electronic control, meeting the product design requirements; the insulating parts and the shell and the lead terminals are all interference fit, which can prevent glue leakage during glue pouring.

[0038] Specific embodiments of the present invention are shown below.

[0039] The opening 12 is formed on the side of the cavity 11 and extends upward until it reaches the upper edge of the housing 1, forming a U-shaped opening on the side of the cavity 11. The side walls and bottom wall of the opening 12 are each provided with a retaining groove 13. The left and right sides and bottom edge of the insulating member are interference-fitted within the corresponding retaining grooves 13. This structure allows the insulating member to be installed in the opening 12 by plugging, guided by the retaining grooves 13, allowing for quick installation.

[0040] The insulating member may be a plastic member made of materials such as PPS (polyphenylene sulfide), PBT (polybutylene terephthalate), PC (polycarbonate) or nylon.

[0041] Elastic material 2 is provided between the mating surfaces of the insulating member and the opening 12, and between the insulating member and the lead-out terminal, so as to enhance the sealing performance and improve the tightness of the fit.

[0042] Furthermore, the elastic material is made of silicone, rubber or similar materials, and is integrally formed with the insulating member by a double-shot injection molding or secondary encapsulation process.

[0043] According to the connection requirements of the connection end, the electrical contact surface of the capacitor lead terminal is generally set to two types, one is parallel to the side of the housing 1, and the other is perpendicular to the side of the housing 1. The following are respectively described:

[0044] (1) See Figure 1-3 6. The insulating member includes a first insulating member 3, and the lead terminal includes a first terminal 4; the first insulating member 3 is provided with a first mounting hole 31; the first terminal 4 is a columnar member and is interference-fitted within the first mounting hole 31. The first terminal 4 is provided with a first connection hole 41 whose axis is perpendicular to the side of the housing 1, and is used for electrically connecting to the connection end, that is, the electrical contact surface of the first terminal 4 is parallel to the side of the housing 1. When the connection requirement of the connection end requires that the electrical contact surface of the lead terminal be parallel to the side of the housing 1, a columnar member is selected as the first terminal 4. The exposed end surface of the columnar member is the electrical contact surface, and the larger area of ​​the end surface can meet the contact surface area requirement during connection; at the same time, the larger cross-sectional area of ​​the columnar member is used to cover the first mounting hole 31. In actual products, it is only necessary to seal the small gap between the columnar member and the first mounting hole 31 (using the above-mentioned elastic material), which is not easy to leak glue during glue pouring, and product quality is guaranteed.

[0045] To match the length of the cylindrical first terminal 4 and prevent it from shaking after being installed in the first mounting hole 31, the side surface of the first insulating member 3 extends horizontally to form a protrusion 32, and the first mounting hole 31 extends through the protrusion 32. This increases the length of the first mounting hole 31 and the thickness of the first insulating member 3, thereby enhancing the structural strength of the first insulating member 3.

[0046] In this embodiment, there are two first terminals 4 , which serve as a positive DC lead-out terminal and a negative DC lead-out terminal respectively.

[0047] (2) See Figure 1 、 2 , 4, 7, the above-mentioned insulating member includes a second insulating member 5, and the lead terminal includes a second terminal 6; the second insulating member 5 is provided with a second mounting hole 51; the second terminal 6 is a sheet-shaped member and is interference-fitted in the second mounting hole 51, and the second terminal 6 is provided with a second connecting hole 61 with an axis parallel to the side surface of the housing 1, which is used for electrical connection with the connecting end, that is, the electrical contact surface of the second terminal 6 is perpendicular to the side surface of the housing 1.

[0048] To enhance the connection strength between the connecting end and the second terminal 6 and achieve a more secure connection, the second insulating member 5 is provided with a groove 52 below the second connecting hole 61. A nut 7 is embedded in the groove 52 and is coaxially arranged with the second connecting hole 61. Since the second terminal 6 is a sheet-shaped member, when the connecting bolt passes through the second connecting hole 61 and is locked with the nut 7, a more secure fixation is achieved.

[0049] In this embodiment, there are two second terminals 6 , which are divided into two groups as positive AC lead-out terminals and negative AC lead-out terminals respectively, and the positive AC lead-out terminals and the negative AC lead-out terminals are arranged in a cyclical manner.

[0050] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A capacitor, characterized in that: Including housing, insulating parts and lead terminals; The housing is a metal controller box, and its cavity serves as a capacitor potting cavity; the cavity is provided with an opening; The insulating member is interference-fitted in the opening to achieve sealing of the opening, and is provided with a mounting hole; The lead terminal is interference-fitted in the mounting hole to achieve sealing of the mounting hole.

2. The capacitor according to claim 1, wherein: The opening is opened on the side of the cavity and extends upward until it reaches the edge of the upper surface of the shell, and the two side walls and bottom wall of the opening are provided with limiting grooves, and the left and right sides and bottom edge of the insulating part are respectively interference fit in the corresponding limiting grooves.

3. The capacitor according to claim 1, wherein: The insulating member is a plastic member.

4. The capacitor according to claim 1, wherein: Elastic materials are provided between the matching surfaces of the insulating member and the opening, and between the matching surfaces of the insulating member and the lead-out terminal.

5. The capacitor according to claim 4, wherein: The elastic material is silicone or rubber, and is integrally formed with the insulating component by a double-shot injection molding or secondary encapsulation process.

6. The capacitor according to any one of claims 1 to 5, wherein: The insulating member includes a first insulating member, and the lead terminal includes a first terminal; the first insulating member is provided with a first mounting hole; the first terminal is a columnar member and is interference fit in the first mounting hole, and the first terminal is provided with a first connecting hole whose axis is perpendicular to the side of the shell.

7. The capacitor according to claim 6, wherein: The side surface of the first insulating member extends in a horizontal direction to form a protrusion, and the first mounting hole passes through the protrusion.

8. The capacitor according to any one of claims 1 to 5, wherein: The insulating member includes a second insulating member, and the lead terminal includes a second terminal; the second insulating member is provided with a second mounting hole; the second terminal is a sheet-shaped member and is interference fit in the second mounting hole, and the second terminal is provided with a second connecting hole whose axis is parallel to the side of the shell.

9. The capacitor according to claim 8, wherein: A groove is provided on the second insulating member below the second connecting hole. A nut is embedded in the groove. The nut is coaxially arranged with the second connecting hole.

Images