Soldering lug type aluminum electrolytic capacitor

Abstract

The utility model discloses a soldering lug type aluminum electrolytic capacitor, which relates to the technical field of capacitors, and comprises an aluminum shell, a core arranged in the aluminum shell and a cover plate arranged at an opening of the aluminum shell and used for sealing the opening, a sleeve is wrapped outside the aluminum shell, one side of the sleeve protrudes out of the plane of the cover plate, and the other side of the sleeve protrudes out of the plane of the cover plate. A gas overflow groove is formed in the position, protruding out of the cover plate, of the sleeve, and a fixed connecting point is fixedly connected to the edge of the sleeve. According to the utility model, one side of the sleeve is provided with the gas overflow groove, so that the bottom of the cover plate of the capacitor can be communicated with the external space, and gas generated in the working process of the capacitor can be effectively released through the gas overflow groove, thereby solving the problems that the gas can only escape from the soldering lug, looseness is caused after a long time, and the service life of the capacitor is prolonged. And moreover, the sleeve and the circuit board of the device are separated by the insulating plate, so that the insulating property between the capacitor and the circuit board can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to capacitor technical field, concretely is a kind of soldering lug type aluminum electrolytic capacitor. BACKGROUND

[0002] Compared with other film capacitors, ceramic capacitors and the like, aluminum electrolytic capacitor has the advantages of large capacity and low cost, so it is widely used in industrial equipment, consumer electronics and the like. The structure of the soldering lug type aluminum electrolytic capacitor mainly includes a core wrapped by an aluminum shell, two lead-out terminals respectively connected to the positive and negative electrode soldering lugs of a cover plate, and an insulating sleeve provided outside the aluminum shell.

[0003] In the patent with the patent number CN114678220B, a soldering lug type aluminum electrolytic capacitor is proposed. Through research on the existing technology and the above-mentioned patent, it is found that the positive and negative electrode soldering lugs of the existing soldering lug type aluminum electrolytic capacitor are respectively inserted into the corresponding mounting holes of a circuit board, the capacitor is installed upside down on the circuit board, the top of the capacitor directly contacts the circuit board, and only a 0.15mm thick sleeve is provided between the aluminum shell and the circuit board, which has the risk of easy breakdown and short circuit. In addition, since the top of the capacitor directly contacts the circuit board, the gas generated during the operation of the capacitor can only escape from the positive and negative electrode soldering lugs, which may cause loosening and affect the installation strength of the capacitor over a long period of time. Therefore, a soldering lug type aluminum electrolytic capacitor is proposed. SUMMARY

[0004] TECHNICAL PROBLEM

[0005] The purpose of the utility model is to make up for the shortcomings of the prior art and provide a soldering lug type aluminum electrolytic capacitor.

[0006] TECHNICAL SCHEME

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a soldering lug type aluminum electrolytic capacitor, which comprises an aluminum shell, a core provided in the aluminum shell, and a cover plate installed at the opening of the aluminum shell for sealing the opening. The outside of the aluminum shell is covered with a sleeve. One side of the sleeve protrudes from the plane of the cover plate, and a gas overflow groove is provided at the position where the sleeve protrudes from the cover plate. A fixed connection point is fixedly connected to the edge of the sleeve. The cover plate is provided with a positive terminal post and a negative terminal post. By providing a gas overflow groove on one side of the sleeve, the bottom of the cover plate of the capacitor can be in communication with the external space, so that the gas generated during the operation of the capacitor can be effectively released through the gas overflow groove, solving the problem of traditional close-fitting installation, where the gas can only escape from the soldering lugs, which may cause loosening and affect the installation strength of the capacitor over a long period of time.

[0008] Preferably, the aluminum shell is provided with an installation cavity for installing the core. The installation cavity has electrolyte inside. The core is soaked in the electrolyte.

[0009] Preferably, the core comprises electrolytic paper, cathode foil and anode foil, which are arranged in a stack.

[0010] Preferably, the anode foil is connected with the positive terminal post, and the cathode foil is connected with the negative terminal post.

[0011] Preferably, one side of the sleeve is provided with an insulating plate, an installation hole for mounting a fixed connection point is formed in the insulating plate, and the insulating plate is fixedly connected with the circuit board. The sleeve and the circuit board of the device are separated by the insulating plate, so that the insulation performance between the capacitor and the circuit board can be effectively improved, the risk of short circuit between the capacitor and the circuit board is reduced, and the safety of the device in use is improved.

[0012] Preferably, the insulating plate is further provided with guide holes for mounting the positive terminal post and the negative terminal post.

[0013] Beneficial effects:

[0014] Compared with the prior art, the welding piece type aluminum electrolytic capacitor has the following beneficial effects:

[0015] The utility model discloses a gas overflow groove is set up on one side of the sleeve, so that the bottom of the cover plate of the capacitor and the outside space can be communicated, and then the gas generated in the working process of the capacitor can be effectively released through the gas overflow groove. The problem that the gas can only escape from the welding piece in the traditional close installation, which can cause loosening and affect the installation strength of the capacitor in the long run is solved. The sleeve and the circuit board of the device are separated by the insulating plate, so that the insulation performance between the capacitor and the circuit board can be effectively improved, the risk of short circuit between the capacitor and the circuit board is reduced, and the safety of the device in use is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0017] Fig. 1 It is a structural schematic diagram of the capacitor of the utility model;

[0018] Fig. 2 It is a sectional structure schematic diagram of the utility model;

[0019] Fig. 3 It is a structural schematic diagram of the insulating plate of the utility model.

[0020] In the picture:

[0021] 1. Aluminum shell; 2. Core; 3. Cover plate; 4. Sleeve; 5. Positive terminal; 6. Negative terminal; 7. Insulating plate; 101. Opening; 102. Mounting cavity; 201. Electrolytic paper; 202. Cathode foil; 203. Anode foil; 401. Gas overflow groove; 402. Fixed connection point; 701. Mounting hole; 702. Guide hole; 8. Electrolyte. Detailed Implementation

[0022] 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.

[0023] Please see Figs. 1-3 As shown, this utility model provides a technical solution: a soldered aluminum electrolytic capacitor, including an aluminum shell 1, a core 2 disposed in the aluminum shell 1, and a cover plate 3 installed at the opening 101 of the aluminum shell 1 for sealing the opening 101. The aluminum shell 1 is covered by a sleeve 4, one side of the sleeve 4 protrudes from the plane of the cover plate 3, and a gas overflow groove 401 is opened at the position where the sleeve 4 protrudes from the cover plate 3. A fixed connection point 402 is fixedly connected to the edge of the sleeve 4. The cover plate 3 is provided with a positive terminal 5 and a negative terminal 6. By providing a gas overflow groove 401 on one side of the sleeve 4, the bottom of the cover plate of the capacitor can be connected to the external space. Thus, the gas generated during the operation of the capacitor can be effectively released through the gas overflow groove 401, which solves the problem of traditional tight-fitting installation, where gas can only escape from the soldered piece, which will cause loosening and affect the installation strength of the capacitor in the long run.

[0024] Please refer to the following carefully. Fig. 2 and Fig. 3 An aluminum shell 1 has an installation cavity 102 for mounting the core 2. The installation cavity 102 contains an electrolyte 4, and the core 2 is immersed in the electrolyte 4. The core 2 includes an electrolytic paper 201, a cathode foil 202, and an anode foil 203. The electrolytic paper 201, cathode foil 202, and anode foil 203 are stacked. The anode foil 203 is connected to the positive terminal 5, and the cathode foil 202 is connected to the negative terminal 6.

[0025] Please refer to the following carefully. Fig. 2An insulating plate 7 is provided on one side of the sleeve 4. The insulating plate 7 has mounting holes 701 for installing the fixed connection point 402. The insulating plate 7 is fixedly connected to the circuit board. The insulating plate 7 also has guide holes 702 for installing the positive terminal 5 and the negative terminal 6. The sleeve 4 and the circuit board 8 of this device are separated by the insulating plate 7, which can effectively improve the insulation performance between the capacitor and the circuit board 8, reduce the risk of short circuit between the capacitor and the circuit board, and improve the safety of the device.

[0026] Working principle: The gas generated during the operation of the capacitor can be effectively released through the gas overflow groove 401, which solves the problem of traditional tight-fitting installation, where the gas can only escape from the solder pad. The sleeve 4 and the circuit board 8 are separated by the insulating plate 7, which can effectively improve the insulation performance between the capacitor and the circuit board 8.

[0027] 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.

[0028] 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 solder-type aluminum electrolytic capacitor, comprising an aluminum shell (1), a core (2) disposed in the aluminum shell (1), and a cover plate (3) installed at an opening (101) of the aluminum shell (1) for sealing the opening (101), characterized in that: The aluminum shell (1) is covered with a sleeve (4). One side of the sleeve (4) protrudes from the plane of the cover plate (3), and a gas overflow groove (401) is opened at the position where the sleeve (4) protrudes from the cover plate (3). A fixed connection point (402) is fixedly connected to the edge of the sleeve (4). The cover plate (3) is provided with a positive terminal (5) and a negative terminal (6).

2. The solder-type aluminum electrolytic capacitor according to claim 1, characterized in that: The aluminum shell (1) is provided with a mounting cavity (102) for mounting the core (2), and the mounting cavity (102) contains an electrolyte (8), and the core (2) is immersed in the electrolyte (8).

3. The solder-type aluminum electrolytic capacitor according to claim 1, characterized in that: The core (2) includes electrolytic paper (201), cathode foil (202) and anode foil (203), which are stacked.

4. A solder-type aluminum electrolytic capacitor according to claim 3, characterized in that: The anode foil (203) is connected to the positive terminal (5), and the cathode foil (202) is connected to the negative terminal (6).

5. A solder-type aluminum electrolytic capacitor according to claim 1, characterized in that: An insulating plate (7) is provided on one side of the sleeve (4). The insulating plate (7) has an installation hole (701) for installing a fixed connection point (402) inside. The insulating plate (7) is fixedly connected to the circuit board.

6. A solder-type aluminum electrolytic capacitor according to claim 5, characterized in that: The insulating plate (7) also has guide holes (702) for installing the positive terminal (5) and the negative terminal (6).

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