Capacitor

Abstract

The utility model discloses a capacitor, which can accommodate metal scraps generated when a screw or a bolt is locked, prevent the metal scraps from moving everywhere and eliminate potential safety hazards. The capacitor comprises a capacitor shell, a filler and an extraction electrode, the capacitor shell is filled with a filler; the extraction electrode is partially embedded in the filler, one end of the extraction electrode is exposed out of the filler and extends towards the direction outside the side surface of the capacitor shell, and the end part is provided with a through hole; the side surface of the capacitor shell is provided with an accommodating groove corresponding to the end part of the extraction electrode, and the accommodating groove is located below the extraction electrode.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor which can avoid the problem of short circuit caused by metal debris. Background Art

[0002] With the rapid development of electronic power technology, metallized film capacitors are increasingly used in industrial control, new energy, automotive electronics, rail transit, power grid and other technical fields, and the requirements for capacitor product performance are also getting higher and higher.

[0003] The traditional film capacitor structure is generally composed of a capacitor core (including plates, dielectrics and metal layers sprayed on both end surfaces), lead electrodes (usually leads, solder tabs or busbars), a packaging shell, and a filling resin (such as epoxy resin).

[0004] For high-power or large-sized film capacitors, self-tapping screws or a combination of bolts and nuts are often needed to connect film capacitors to other components. When tightening the screws / bolts, the processing burrs on the threads will fall off due to the friction between the components. When the detached metal debris is large in size, it may cause the chip pins inside the device using film capacitors to short-circuit and fail, because the pin spacing of the integrated chip is very small, even less than 1mm. If effective measures are not taken, the surface metal debris will move everywhere, and this short-circuit situation often occurs in actual applications. Utility Model Content

[0005] The utility model aims to provide a capacitor to solve the problems existing in the prior art, and can contain metal debris generated when tightening screws or bolts, prevent the metal debris from moving around, and eliminate potential safety hazards.

[0006] In order to achieve the above purpose, the solution of the utility model is:

[0007] A capacitor comprises a capacitor shell, a filler and an extraction electrode; the capacitor shell is filled with the filler; the extraction electrode is partially buried in the filler, one end of which is exposed from the filler and extends in a direction other than the side of the capacitor shell; a receiving groove is provided on the side of the capacitor shell corresponding to the end of the extraction electrode, and the receiving groove is located below the extraction electrode.

[0008] The capacitor further comprises a nut; a through hole is arranged at the end of the lead-out electrode, and the opening of the receiving groove faces the through hole; the nut is arranged in the receiving groove and fixed relative to the through hole.

[0009] Preferably, a protrusion opposite to the end of the lead-out electrode is provided on the side surface of the capacitor housing, and the accommodating groove is recessed and formed on the upper surface of the protrusion.

[0010] Preferably, the protrusion is integrally formed with the capacitor housing.

[0011] The filler is epoxy resin.

[0012] The nut is a hexagonal nut.

[0013] Preferably, a step is provided at the upper portion of the accommodating groove, a side wall of the step is a regular hexagon matching the hexagonal nut, and the hexagonal nut is positioned and fitted on the step.

[0014] The nut is a self-clinching nut.

[0015] Preferably, the rivet nut is fixed by riveting in the through hole of the lead-out electrode.

[0016] After adopting the above technical solution, the utility model has the following technical effects:

[0017] The utility model provides a receiving groove on the side of the capacitor housing. When the lead electrode needs to be connected to other components using screws or bolts, metal debris generated by friction directly falls into the receiving groove and is confined in the receiving groove and will not move around, thereby avoiding the problem of short circuit of other components due to metal debris and improving the safety performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the first embodiment of the utility model;

[0019] Figure 2 A three-dimensional diagram of a nut and a capacitor housing according to the first embodiment of the utility model;

[0020] Figure 3 A cross-sectional view of a nut and a capacitor housing according to a first embodiment of the utility model;

[0021] Figure 4 A three-dimensional diagram of a nut and a capacitor housing according to a second embodiment of the utility model;

[0022] Figure 5 A cross-sectional view of a nut and a capacitor housing according to a second embodiment of the utility model;

[0023] Description of Figure Numbers:

[0024] 1-capacitor housing; 11-accommodating groove; 12-step; 13-protrusion; 2-filler; 3-lead electrode; 31-perforation; 4-nut; 4a-hexagonal nut; 4b-compression rivet nut. DETAILED DESCRIPTION

[0025] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0026] refer to Figures 1 to 5 As shown, the utility model discloses a capacitor, comprising a capacitor housing 1, a filler 2 and a lead electrode 3;

[0027] The capacitor housing 1 is filled with a filler 2;

[0028] The lead electrode 3 is partially buried in the filler 2, and one end thereof is exposed from the filler 2 and extends in a direction other than the side surface of the capacitor housing 1;

[0029] A receiving groove 11 is provided on the side surface of the capacitor housing 1 corresponding to the end of the lead-out electrode 3 , and the receiving groove 11 is located below the end of the lead-out electrode 3 .

[0030] Through the above scheme, the utility model sets the receiving groove 11 on the side of the capacitor housing 1. When the lead electrode 3 needs to be connected with other components using screws or bolts, the metal debris generated by friction directly falls into the receiving groove 11 and is confined in the receiving groove 11 and will not move around, thereby avoiding the problem of short circuit of other components due to metal debris, and the safety performance of the product is improved.

[0031] The two embodiments of the utility model further include a nut 4; a through hole 31 is provided at the end of the lead-out electrode 3, and the opening of the receiving groove 11 faces the through hole 31; the nut 4 is disposed in the receiving groove 11 and fixed relative to the through hole 31, and can be fixed on the lead-out electrode 3 or in the receiving groove 11. By designing the nut 4, the connection between the lead-out electrode 3 and other components can be made more firm and stable.

[0032] See also Figures 1 to 3 , showing the first embodiment of the utility model.

[0033] The nut 4 is a hexagonal nut 4a.

[0034] Furthermore, a step 12 is provided at the upper portion of the above-mentioned receiving groove 11, and the side wall of the step 12 is a regular hexagon matching the hexagonal nut 4a, so that the hexagonal nut 4a can be positioned and fitted in the upper portion of the receiving groove 11, and the lower portion of the receiving groove 11 is used to accommodate metal debris generated by friction.

[0035] A protruding portion 13 opposite to the end of the lead-out electrode 3 is disposed on the side surface of the capacitor housing 1 , and the receiving groove 11 is recessed and formed on the upper surface of the protruding portion 13 .

[0036] Furthermore, the protrusion 13 may be integrally formed with the capacitor housing 1, such as by opening a specially designed mold to obtain a capacitor housing 1 with the protrusion 13 and the accommodating groove 11, or the capacitor housing 1 may be fixed to the side of the capacitor housing 1 by gluing, welding, etc. after being formed.

[0037] The filler 2 is epoxy resin.

[0038] See also Figure 4 and Figure 5 , showing the second embodiment of the utility model.

[0039] The nut 4 is a self-clinching nut 4b.

[0040] Furthermore, the rivet nut 4 b is fixed in the through hole 31 of the lead-out electrode 3 by rivet.

[0041] The above embodiments and drawings do not limit the product form and style of the present utility model. 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 utility model.

Claims

1. A capacitor, characterized in that: It includes capacitor casing, filling material and lead-out electrodes; The capacitor housing is filled with a filler; The lead electrode is partially buried in the filler, one end of which is exposed from the filler and extends in a direction other than the side of the capacitor housing; A accommodating groove is provided on the side surface of the capacitor shell corresponding to the end of the lead-out electrode, and the accommodating groove is located below the end of the lead-out electrode.

2. The capacitor according to claim 1, wherein: It also includes a nut; a through hole is provided at the end of the lead-out electrode, and the opening of the receiving groove faces the through hole; the nut is arranged in the receiving groove and fixed relative to the through hole.

3. The capacitor according to claim 2, wherein: A protrusion opposite to the end of the lead-out electrode is disposed on the side surface of the capacitor housing, and the accommodating groove is recessed and formed on the upper surface of the protrusion.

4. The capacitor according to claim 3, wherein: The protrusion is integrally formed with the capacitor housing.

5. The capacitor according to claim 2, wherein: The filler is epoxy resin.

6. The capacitor according to any one of claims 2 to 5, characterized in that: The nut is a hexagonal nut.

7. The capacitor according to claim 6, wherein: A step is provided on the upper portion of the accommodating groove, a side wall of the step is a regular hexagon matching the hexagonal nut, and the hexagonal nut is positioned and fitted on the step.

8. The capacitor according to any one of claims 2 to 5, characterized in that: The nut is a self-clinching nut.

9. The capacitor according to claim 8, wherein: The rivet nut is fixed in the through hole of the lead-out electrode by rivet.

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