A capacitor with current overload protection

Abstract

The utility model relates to capacitor technical field discloses a capacitor with current overload protection, including positive pole pin foot, the positive pole pin foot fixed connection insulating pad, the positive pole pin foot one end fixed connection fuse protection mechanism, the fuse protection mechanism fixed connection metal shell, the metal shell outside is equipped with the sealing cover, the metal shell inside is equipped with the positive pole metal sheet, the positive pole metal sheet one side is equipped with the insulating sheet, the insulating sheet other side is equipped with the negative pole metal sheet, the negative pole metal sheet passes through fuse protection mechanism fixed connection negative pole pin foot, the utility model discloses a metal shell fixed connection fuse protection mechanism, and the fuse is equipped with on the metal shell outside, reduces the special metal shell internal space of fuse, and simultaneously facilitates fuse replacement and reduces maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, specifically to a capacitor with current overload protection. Background Technology

[0002] A capacitor is a passive electronic component that can store electric charge and electrical energy. It consists of two conductors (electrodes) and an insulating material (dielectric) in between, and is an indispensable basic component in electronic circuits.

[0003] In existing capacitors, overload protection typically involves connecting a fusible metal wire (fuse) directly in series with the capacitor's electrodes inside the capacitor. When the current is too high, the internal fuse blows, thus protecting the capacitor. However, in practice, integrating the metal wire (fuse) inside the capacitor, especially in smaller capacitors where internal space is limited, can sacrifice capacitance or voltage withstand capability. Furthermore, after the fuse blows, the entire capacitor needs to be replaced, rather than just the fuse element, increasing maintenance costs.

[0004] Therefore, we propose a capacitor with current overload protection. Utility Model Content

[0005] The purpose of this invention is to provide a capacitor with overcurrent protection to solve the problems mentioned in the background art, such as the problem that the metal wire (fuse) is placed inside the capacitor, especially in smaller capacitors where the internal space is limited, the integration of the fuse will sacrifice the capacitance or withstand voltage, and the entire capacitor needs to be replaced after the fuse blows, rather than just the fuse element, which increases maintenance costs.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a capacitor with overcurrent protection, including a positive electrode pin, an insulating pad fixedly connected to the positive electrode pin, a fuse protection mechanism fixedly connected to one end of the positive electrode pin, a metal shell fixedly connected to the fuse protection mechanism, a sealing cover provided on the outside of the metal shell, a positive electrode metal sheet provided inside the metal shell, an insulating sheet provided on one side of the positive electrode metal sheet, a negative electrode metal sheet provided on the other side of the insulating sheet, and a negative electrode metal sheet fixedly connected to the negative electrode pin through the fuse protection mechanism.

[0007] Preferably, the inner side of the sealing cover is provided with a positioning ear, which is a negative electrode positioning mark used to determine the positive and negative electrodes, and the surface of the sealing cover is provided with a negative electrode marking groove.

[0008] Preferably, the metal casing has safety protection mechanism grooves on both sides for installing safety protection mechanisms, the top of the metal casing has an explosion guide groove for the direction of explosion, and the sidewalls of the metal casing have positioning ear grooves for sliding positioning ears.

[0009] Preferably, the safety protection mechanism includes a fuse, a metal connecting piece, an insulating base, a metal extrusion piece, and a pin metal connecting piece. The insulating base is fixedly connected to the inner side of the groove of the safety protection mechanism. One end of the insulating base is provided with a metal connecting piece, and the other end of the insulating base is fixedly connected to a pin metal connecting piece.

[0010] Preferably, the metal connecting piece has a metal extrusion piece inside, and one end of the metal connecting piece is fixedly connected to the positive electrode metal piece.

[0011] Preferably, one end of the pin metal connecting piece is disposed on the inner wall of the insulating pad, one end of the pin metal connecting piece is fixedly connected to one end of the positive electrode pin, and the other end of the pin metal connecting piece is provided with a metal extrusion piece.

[0012] Preferably, one side of the metal extrusion sheet is tightly pressed against the sidewall of the pin metal connecting piece, and the other side of the metal extrusion sheet is fixedly connected to the contact surface of the pin metal connecting piece.

[0013] Preferably, one end of the fuse is tightly pressed against the pin metal connector, and the other end of the fuse is tightly pressed against the metal connector.

[0014] Preferably, an insulating pad is fixedly connected inside the metal casing, and the insulating pad is fixedly connected to the negative electrode pin.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention uses a metal casing to fix the fuse protection mechanism, and places the fuse on the outside of the metal casing, which reduces the internal space of the dedicated metal casing for the fuse, while also facilitating fuse replacement and reducing maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall cross-sectional distribution structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure between the sealing cover and the metal shell of this utility model;

[0019] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0020] Figure 4 This is a schematic diagram showing the location distribution of the insurance protection mechanism of this utility model;

[0021] Figure 5 This is a schematic diagram of the overall internal distribution structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the overall front structure of this utility model;

[0023] In the diagram: 1. Positive electrode pin; 2. Insulating pad; 3. Safety protection mechanism; 4. Metal casing; 5. Sealing cover; 6. Positive electrode metal plate; 7. Insulating plate; 8. Negative electrode metal plate; 9. Negative electrode pin;

[0024] 301. Fuse; 302. Metal connecting piece; 303. Insulating base; 304. Metal extrusion piece; 305. Pin-type metal connecting piece;

[0025] 501. Positioning Ear. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example

[0028] Please see Figures 1-6 The diagram shows a capacitor with overcurrent protection, including a positive pin 1, an insulating pad 2 fixedly connected to the positive pin 1, a fuse protection mechanism 3 fixedly connected to one end of the positive pin 1, a metal casing 4 fixedly connected to the fuse protection mechanism 3, a sealing cover 5 on the outside of the metal casing 4, a positive metal sheet 6 inside the metal casing 4, an insulating sheet 7 on one side of the positive metal sheet 6, a negative metal sheet 8 on the other side of the insulating sheet 7, and a negative metal sheet 8 fixedly connected to the negative pin 9 through the fuse protection mechanism 3. This invention uses a metal casing to fix the fuse protection mechanism, placing the fuse on the outside of the metal casing, reducing the internal space of the dedicated metal casing for fuses, facilitating fuse replacement, and reducing maintenance costs.

[0029] Furthermore, the inner side of the sealing cover 5 is provided with a positioning ear 501, which is a negative electrode positioning mark used to determine the positive and negative electrodes, and a negative electrode mark groove is provided on the surface of the sealing cover 5.

[0030] Furthermore, both sides of the metal casing 4 are provided with safety protection mechanism grooves for installing the safety protection mechanism 3, the top of the metal casing 4 is provided with an explosion guide groove for the direction of explosion, and the side wall of the metal casing 4 is provided with a positioning ear groove for the sliding of the positioning ear 501.

[0031] Furthermore, the safety protection mechanism 3 includes a fuse 301, a metal connecting piece 302, an insulating base 303, a metal extrusion piece 304, and a pin metal connecting piece 305. The insulating base 303 is fixedly connected to the inner side of the groove of the safety protection mechanism. One end of the insulating base 303 is provided with the metal connecting piece 302, and the other end of the insulating base 303 is fixedly connected to the pin metal connecting piece 305. The metal extrusion piece 304 is provided inside the metal connecting piece 302. One end of the metal connecting piece 302 is fixedly connected to the positive electrode metal piece 6. One end of the metal connecting piece 305 is disposed on the inner wall of the insulating pad 2. One end of the metal connecting piece 305 is fixedly connected to one end of the positive electrode pin 1. The other end of the metal connecting piece 305 is provided with a metal extrusion piece 304. One side of the metal extrusion piece 304 is tightly pressed against the side wall of the metal connecting piece 305, and the other side of the metal extrusion piece 304 is fixedly connected to the contact surface of the metal connecting piece 305. One end of the fuse 301 is tightly pressed against the metal connecting piece 305, and the other end of the fuse 301 is tightly pressed against the metal connecting piece 302.

[0032] Furthermore, an insulating pad 2 is fixedly connected inside the metal casing 4, and the insulating pad 2 is fixedly connected to the negative electrode pin 9.

[0033] In this scheme, the assembly process is as follows: First, positive electrode metal sheet 6, insulating sheet 7, and negative electrode metal sheet 8 are stacked sequentially inside the metal casing 4 to form the capacitor core. A metal connecting piece 302 is installed at one end of the insulating base 303, and one end is welded and fixed to the positive electrode metal sheet 6; the other end has a reserved interface for connecting the fuse 301. A pin-type metal connecting piece 305 is fixed at the other end of the insulating base 303, one end of which extends to the inner wall of the insulating pad 2, and the other end has a reserved pressing surface for a metal extrusion piece 304. The insulating base 303 is then embedded into the safety protection mechanism grooves on both sides of the metal casing 4 and fixed by adhesive to form an electrical insulation base. Then, one end of the fuse 301 is pressed onto the pressing surface of the pin metal connecting piece 305, and the other end is pressed onto the corresponding interface of the metal connecting piece 302 to form a current path. One end of the positive pin 1 is inserted into the reserved hole of the insulating pad 2 and fixed by welding. One end of the negative pin 9 is passed through the other reserved hole of the insulating pad 2 and fixed by welding to one end of the pin metal connecting piece 305. The positioning ear 501 inside the sealing cover 5 is slid into the positioning ear groove on the side wall of the metal shell 4 to ensure that the positioning ear 501 as the negative positioning mark is fully exposed. At the same time, the insulating pad 2 is fixed to the bottom of the metal shell 4 and the sealing state is ensured.

[0034] When it is necessary to replace fuse 301, move the sealing cover 5 upward and separate it from the metal housing 4, then remove the old fuse 301 and pull it out, insert the new fuse 301, and finally move the sealing cover 5 downward and seal it.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A capacitor with overcurrent protection, characterized in that: Includes a positive electrode pin (1), the positive electrode pin (1) is fixedly connected to an insulating pad (2), one end of the positive electrode pin (1) is fixedly connected to a safety protection mechanism (3), the safety protection mechanism (3) is fixedly connected to a metal shell (4), a sealing cover (5) is provided on the outside of the metal shell (4), a positive electrode metal sheet (6) is provided inside the metal shell (4), an insulating sheet (7) is provided on one side of the positive electrode metal sheet (6), a negative electrode metal sheet (8) is provided on the other side of the insulating sheet (7), and the negative electrode metal sheet (8) is fixedly connected to the negative electrode pin (9) through the safety protection mechanism (3).

2. A capacitor with overcurrent protection according to claim 1, characterized in that: The sealing cover (5) is provided with a positioning ear (501) on the inner side. The positioning ear (501) is a negative electrode positioning mark used to determine the positive and negative electrodes. The sealing cover (5) is provided with a negative electrode mark groove on its surface.

3. A capacitor with overcurrent protection according to claim 1, characterized in that: The metal casing (4) has safety protection mechanism grooves on both sides for installing safety protection mechanism (3), the top of the metal casing (4) has an explosion guide groove for the direction of explosion, and the side wall of the metal casing (4) has a positioning ear groove for sliding positioning ear (501).

4. A capacitor with overcurrent protection according to claim 1, characterized in that: The insurance protection mechanism (3) includes a fuse (301), a metal connecting piece (302), an insulating base (303), a metal extrusion piece (304), and a pin metal connecting piece (305). The insulating base (303) is fixedly connected to the inner side of the groove of the insurance protection mechanism. One end of the insulating base (303) is provided with a metal connecting piece (302), and the other end of the insulating base (303) is fixedly connected to the pin metal connecting piece (305).

5. A capacitor with overcurrent protection according to claim 4, characterized in that: The metal connecting piece (302) has a metal extrusion piece (304) inside, and one end of the metal connecting piece (302) is fixedly connected to the positive electrode metal piece (6).

6. A capacitor with overcurrent protection according to claim 4, characterized in that: One end of the pin metal connecting piece (305) is disposed on the inner wall of the insulating pad (2), one end of the pin metal connecting piece (305) is fixedly connected to one end of the positive electrode pin (1), and the other end of the pin metal connecting piece (305) is provided with a metal extrusion piece (304).

7. A capacitor with overcurrent protection according to claim 4, characterized in that: The metal extrusion sheet (304) tightly presses against the side wall of the pin metal connecting sheet (305) on one side, and the metal extrusion sheet (304) is fixedly connected to the contact surface of the pin metal connecting sheet (305) on the other side.

8. A capacitor with overcurrent protection according to claim 4, characterized in that: One end of the fuse (301) is tightly pressed against the pin metal connecting piece (305), and the other end of the fuse (301) is tightly pressed against the metal connecting piece (302).

9. A capacitor with overcurrent protection according to claim 1, characterized in that: The insulating pad (2) is fixedly connected inside the metal shell (4), and the insulating pad (2) is fixedly connected to the negative electrode pin (9).

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