Capacitor

Abstract

The utility model discloses a capacitor, which can reduce the manufacturing cost of the capacitor and shorten the manufacturing time. The capacitor comprises a capacitor shell, a capacitor core, an extraction electrode and a mounting plate; the capacitor shell is provided with a containing cavity, and the opening side edge of the containing cavity protrudes in the opening direction to form a plurality of clamping hooks. The capacitor core, the extraction electrode and the mounting plate are assembled into a whole, and one end of the extraction electrode is electrically connected with the capacitor core; the edge of the mounting plate is matched with the edge of the opening of the containing cavity, a notch is formed in the position, corresponding to the clamping hook, of the mounting plate, and a step is arranged in the notch; and the clamping hooks are hooked and buckled on the corresponding steps so as to fix the mounting plate on the capacitor shell.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor capable of reducing manufacturing cost and time. 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 (generally leads, solder tabs or busbars), a packaging shell, and a filling resin (such as epoxy resin).

[0004] In the existing capacitor manufacturing process, especially in the process of assembling the capacitor semi-finished product (consisting of the capacitor core and the lead electrode) with the packaging shell, it is necessary to use tooling fixtures for positioning and bolt tightening steps. After the filling resin is cured, these tooling fixtures must be loosened. These steps will increase the manufacturing time and cost of the capacitor. Utility Model Content

[0005] The purpose of the utility model is to provide a capacitor to solve the problems existing in the prior art, thereby reducing the production cost of the capacitor and shortening the production time.

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

[0007] A capacitor comprises a capacitor housing, a capacitor core, an extraction electrode and a mounting plate; the capacitor housing is provided with a cavity, and the opening side of the cavity is protruded along the opening direction to form a plurality of hooks; the capacitor core, the extraction electrode and the mounting plate are assembled into a whole, and one end of the extraction electrode is electrically connected to the capacitor core; the edge of the mounting plate is matched with the edge of the cavity opening, and a notch is provided at a position corresponding to the hook, and a step is provided in the notch; the hook is hooked on the corresponding step to fix the mounting plate on the capacitor housing.

[0008] The mounting plate is a copper plate or an aluminum plate; an insulating plate is arranged between the mounting plate and the lead-out electrode; the mounting plate, insulating plate, lead-out electrode and capacitor core are arranged layer by layer from top to bottom, and the fitting surfaces of the mounting plate, insulating plate and lead-out electrode are fixedly connected.

[0009] Preferably, the number of the lead-out electrodes is designed to be two, one end of the two lead-out electrodes is respectively connected to the positive and negative electrodes of the capacitor core, and insulating paper is provided between the contact surfaces of the two lead-out electrodes.

[0010] The hooks are arranged on both sides of the cavity in the length direction, and a groove is arranged below the hook on at least one side.

[0011] Preferably, the wall thickness of the capacitor housing where the groove is provided is 3 / 4 of the wall thickness of the capacitor housing.

[0012] The capacitor further comprises a filler filled in the cavity, the capacitor core and the lead electrode are both buried in the filler, and the other end of the lead electrode is exposed from the filler.

[0013] Preferably, the filler is epoxy resin.

[0014] Preferably, two ends of the mounting plate are shorter than two ends of the capacitor housing.

[0015] Preferably, the mounting plate is provided with a filling port, and the filling port passes through the upper surface of the mounting plate to 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 mounting plate, and the capacitor core, the lead-out electrode and the mounting plate can be assembled into an integral structure of a semi-finished capacitor through existing processes such as welding, screw locking, gluing, etc., and then the semi-finished capacitor is installed as a whole into the capacitor housing. Since the edge of the mounting plate abuts against the opening edge of the container, the capacitor core can be installed in the cavity in the air, and the mounting plate and the capacitor housing are relatively fixed by the hook at the step of the mounting plate, ensuring that the glue filling is carried out normally. The structure of the utility model does not need to disassemble the mounting plate after the capacitor is subsequently manufactured, and does not need to be bolted before glue filling, so the overall manufacturing cost is reduced and the manufacturing time is shortened. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is an exploded view of a specific embodiment of the utility model;

[0020] Figure 3 A top view of a specific embodiment of the utility model;

[0021] Figure 4 for Figure 3 Sectional view in the AA direction;

[0022] Figure 5 for Figure 3 Cross-sectional view in the BB direction;

[0023] Figure 6 It is a schematic diagram of the assembly of the utility model;

[0024] Description of Figure Numbers:

[0025] 1-capacitor housing; 11-cavity; 12-hook; 13-groove; 2-capacitor core; 3-lead electrode; 4-mounting plate; 41-notch; 42-step; 43-filling port; 5-insulating plate; 6-insulating paper; 7-filler. DETAILED DESCRIPTION

[0026] 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.

[0027] refer to Figures 1 to 6 As shown, the utility model discloses a capacitor, comprising a capacitor housing 1, a capacitor core 2, a lead electrode 3 and a mounting plate 4;

[0028] The capacitor housing 1 is provided with a cavity 11, and a plurality of hooks 12 are formed on the opening side of the cavity 11 protruding along the opening direction;

[0029] The capacitor core 2, the lead electrode 3 and the mounting plate 4 are assembled into a whole, and one end of the lead electrode 3 is electrically connected to the capacitor core 2;

[0030] The edge of the mounting plate 4 is matched with the edge of the opening of the cavity 11 , and a notch 41 is provided at a position corresponding to the hook 12 , and a step 42 for the hook 12 to hook is provided in the notch 41 .

[0031] Through the above scheme, the utility model can assemble the capacitor core 2, the lead electrode 3 and the mounting plate 4 into an integral structure of a semi-finished capacitor by welding, screw locking, gluing and other existing processes by setting the mounting plate 4. Figure 6 , and then the capacitor semi-finished product is installed as a whole into the capacitor housing 1. Since the edge of the mounting plate 4 is against the opening edge of the container 11, the capacitor core 2 can be installed in the cavity 11 in a suspended manner. At the same time, the hook 12 is hooked on the step 42 of the mounting plate 4 so that the mounting plate 4 and the capacitor housing 1 are relatively fixed to ensure that the glue filling is carried out normally. The structure of the utility model does not need to remove the mounting plate 4 after the subsequent capacitor is manufactured, and does not need to be bolted before glue filling, which reduces the overall manufacturing cost and shortens the manufacturing time.

[0032] Specific embodiments of the present utility model are shown below.

[0033] The mounting plate 4 is a copper plate or an aluminum plate, and the material strength is relatively stable; an insulating plate 5 is arranged between the mounting plate 4 and the lead-out electrode 3, and the mounting plate 4, the insulating plate 5, the lead-out electrode 3 and the capacitor core 2 are arranged layer by layer from top to bottom, and the mounting plate 4, the insulating plate 5 and the contact surfaces of the lead-out electrode 3 are fixedly connected by welding, gluing, etc., and the insulating plate 5 plays an insulating role between the mounting plate 4 and the lead-out electrode 3. In this embodiment, the number of the lead-out electrodes 3 is designed to be two, one end of the two lead-out electrodes 3 is respectively connected to the positive and negative electrodes of the capacitor core 2, and an insulating paper 6 is arranged between the contact surfaces of the two lead-out electrodes 3.

[0034] The hooks 12 are provided on both sides of the length direction of the cavity 11, and a groove 13 is provided under the hook 12 on at least one side. By designing the groove 13, when the capacitor housing 1 is thicker, the hook 12 corresponding to the groove 13 can be made more elastic, and the partially elastic hook 12 makes the installation and fixation of the capacitor housing 1 and the mounting plate 4 smoother and easier to operate. In this embodiment, the wall thickness of the capacitor housing 1 where the groove 13 is provided is 3 / 4 of the wall thickness of the capacitor housing 1, ensuring that the hook 12 thereon has a certain elasticity and will not break during the assembly process when the hook 12 is squeezed and deformed by the mounting plate 4 and moves outward.

[0035] The utility model further comprises a filler 7 filled in the cavity 11, the capacitor core 2 and the lead electrode 3 are buried in the filler 7, and the other end of the lead electrode 3 is exposed from the filler 7 for connecting to external electrical equipment. In this embodiment, the filler 7 is epoxy resin.

[0036] Furthermore, the filler 7 can be filled from the gap between the capacitor housing 1 and the mounting plate 4. For example, the two ends of the mounting plate 4 can be shorter than the two ends of the capacitor housing 1 to make room for the filling opening. Alternatively, as in the present embodiment, a filling port 43 is provided between the mounting plate 4 and the capacitor core 2. The filling port 43 penetrates the upper surface of the mounting plate 4 to the lead-out electrode 3 (including the above-mentioned insulating plate 5, insulating paper 6 and other accessories that can be further provided), so as to facilitate the filling of the corresponding material of the filler 7 from the middle position of the finished capacitor.

[0037] 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 a capacitor housing, a capacitor core, lead electrodes and a mounting plate; The capacitor housing is provided with a cavity, and the opening side of the cavity is protruded along the opening direction to form a plurality of hooks; The capacitor core, the lead-out electrode and the mounting plate are assembled into a whole, and one end of the lead-out electrode is electrically connected to the capacitor core; The edge of the mounting plate is matched with the edge of the opening of the cavity, and a notch is provided at a position corresponding to the hook, and a step is provided in the notch; The hook is hooked on the corresponding step to fix the mounting plate on the capacitor housing.

2. The capacitor according to claim 1, wherein: The mounting plate is a copper plate or an aluminum plate; an insulating plate is arranged between the mounting plate and the lead-out electrode; the mounting plate, insulating plate, lead-out electrode and capacitor core are arranged layer by layer from top to bottom, and the fitting surfaces of the mounting plate, insulating plate and lead-out electrode are fixedly connected.

3. The capacitor according to claim 2, wherein: The number of the lead-out electrodes is designed to be two, one end of the two lead-out electrodes is respectively connected to the positive and negative electrodes of the capacitor core, and insulating paper is arranged between the contact surfaces of the two lead-out electrodes.

4. The capacitor according to claim 1, wherein: The hooks are arranged on both sides of the cavity in the length direction, and a groove is arranged under the hook on at least one side.

5. The capacitor according to claim 4, wherein: The wall thickness of the capacitor housing where the groove is provided is 3 / 4 of the wall thickness of the capacitor housing.

6. The capacitor according to claim 1, wherein: It also includes a filler filled in the cavity, the capacitor core and the lead electrode are buried in the filler, and the other end of the lead electrode is exposed from the filler.

7. The capacitor according to claim 6, wherein: The filler is epoxy resin.

8. The capacitor according to claim 6, wherein: Both ends of the mounting plate are shorter than both ends of the capacitor case.

9. The capacitor according to claim 6, wherein: The mounting plate is provided with a filling port, and the filling port penetrates the upper surface of the mounting plate to the lead-out electrode.

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