Cylindrical aluminum electrolytic capacitor core package

Abstract

The utility model discloses a cylindrical aluminum electrolytic capacitor core package, which comprises a sealing unit, the sealing unit comprises an aluminum shell and a sealing rubber cover fixedly connected at the bottom of an inner cavity of the aluminum shell, two guide pins are riveted at the bottom of the sealing rubber cover and penetrate through the sealing rubber cover, a core body is assembled in the inner cavity of the aluminum shell, and the sealing rubber cover is fixedly connected with the inner cavity of the aluminum shell. The core body comprises an anode foil, electrolytic paper and a cathode foil, the anode foil, the electrolytic paper and the cathode foil are stacked and wound into a coil, the pressure relief unit comprises a pressure relief cover fixedly connected to the top of the aluminum shell, and the top of the pressure relief cover is in a dome protrusion shape. According to the utility model, through the dome-shaped pressure relief cover, the strength of the pressure relief cover can be improved, so that external force applied to the pressure relief cover by the pressure relief cover can be uniformly dispersed, deformation caused by collision is reduced, and the core body can operate in a normal pressure state.

Description

Technical Field

[0001] This utility model relates to the field of capacitor core packaging technology, and in particular to a cylindrical aluminum electrolytic capacitor core packaging. Background Technology

[0002] An aluminum electrolytic capacitor is a polarized capacitor that uses etched high-purity aluminum foil as the anode and electrolytic paper impregnated with electrolyte and another aluminum foil as the cathode. Its basic working principle is that the oxide film (alumina) on the surface of the anode aluminum foil acts as the dielectric. When a voltage is applied between the two electrodes, ions in the electrolyte move under the influence of the electric field, thereby achieving charge storage and release, and realizing circuit functions such as filtering, coupling, and bypassing. The aluminum electrolytic capacitor core is a structure composed of anode foil, cathode foil, and electrolytic paper sandwiched in between, assembled through winding or stacking.

[0003] The top of the aluminum shell is usually provided with a pressure relief protection groove, which is used to relieve pressure when the pressure inside the capacitor core is too high. Because the thickness of the groove is relatively thin, the strength of the top of the aluminum shell is low. When the top of the aluminum shell is impacted, it is easy to deform or even break. Therefore, when used under stable voltage conditions, the increased pressure of the core package can easily break the aluminum shell, which may lead to leakage. Therefore, a cylindrical electrolytic capacitor core package is proposed. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the current cylindrical aluminum electrolytic capacitor core package, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a cylindrical aluminum electrolytic capacitor core package, which is suitable for solving the problem that due to the low strength of the top of the aluminum shell, the top of the aluminum shell is prone to deformation or even cracking when it is impacted, which may lead to leakage during use.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a cylindrical aluminum electrolytic capacitor core package, comprising:

[0008] A sealing unit includes an aluminum shell and a sealing cap fixedly connected to the bottom of the inner cavity of the aluminum shell. Two guide pins are riveted to the bottom of the sealing cap, and both guide pins penetrate the sealing cap. A core is assembled in the inner cavity of the aluminum shell. The core includes an anode foil, an electrolytic paper, and a cathode foil. The anode foil, electrolytic paper, and cathode foil are stacked and wound into a roll.

[0009] The pressure relief unit includes a pressure relief cover fixedly connected to the top of the aluminum shell. The top of the pressure relief cover is dome-shaped and the bottom of the pressure relief cover is circular and concave. A pressure relief groove is provided on the top of the pressure relief cover, and the pressure relief groove is arranged in a cross shape.

[0010] In a preferred embodiment of the cylindrical aluminum electrolytic capacitor core package of this utility model, the bottom of the pressure relief cover is provided with a cross groove, which is aligned with the pressure relief groove.

[0011] In a preferred embodiment of the cylindrical aluminum electrolytic capacitor core package of this utility model, the extended end of the cross groove is bent downward along the bottom surface of the pressure relief cover, and the cross groove is formed by cutting out a cross-shaped semi-circular tube.

[0012] As a preferred embodiment of the cylindrical aluminum electrolytic capacitor core package of this utility model, the top of the pressure relief cover is fixedly connected with multiple copper plates, and the opposite ends of the multiple copper plates are jointly fixedly connected with a disc, and one end of each copper plate connected to the pressure relief cover is folded.

[0013] In a preferred embodiment of the cylindrical aluminum electrolytic capacitor core package of this utility model, the disc is located at the center of the top of the pressure relief cover, and the bottom surface of the disc is a concave surface that fits the pressure relief cover.

[0014] In a preferred embodiment of the cylindrical aluminum electrolytic capacitor core package of this utility model, the top of the sealing cap is dome-shaped and protruding, and multiple reinforcing blocks are fixedly connected to the top of the sealing cap.

[0015] The beneficial effects of this utility model are: the dome-shaped pressure relief cover can improve the strength of the pressure relief cover without increasing the thickness, so that the external force applied to the pressure relief cover can be evenly distributed, thereby reducing the deformation caused by impact and ensuring that the core can operate under normal pressure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a schematic diagram of the overall structure of the cylindrical aluminum electrolytic capacitor core package proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the core structure proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the pressure relief cover and pressure relief groove proposed in this utility model;

[0020] Figure 4 This is a cross-sectional view of the pressure relief cover and cross groove proposed in this utility model;

[0021] Figure 5 This is a schematic diagram of the distribution of the reinforcing plates proposed in this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100. Sealing unit; 101. Aluminum shell; 102. Sealing cap; 103. Guide pin; 104. Core; 1041. Anode foil; 1042. Electrolytic paper; 1043. Cathode foil; 105. Reinforcing block; 200. Pressure relief unit; 201. Pressure relief cover; 202. Pressure relief groove; 203. Cross groove; 204. Copper sheet; 205. Disc. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0027] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0028] Example

[0029] Reference Figures 1-5 As an embodiment of the present invention, a cylindrical aluminum electrolytic capacitor core package is provided, comprising: a sealing unit 100 and a pressure relief unit 200;

[0030] The sealing unit 100 includes an aluminum shell 101 and a sealing cap 102 fixedly connected to the bottom of the inner cavity of the aluminum shell 101. Two guide pins 103 are riveted to the bottom of the sealing cap 102, and both guide pins 103 penetrate the sealing cap 102. The inner cavity of the aluminum shell 101 is equipped with a core 104, which includes an anode foil 1041, an electrolytic paper 1042, and a cathode foil 1043. The anode foil 1041, the electrolytic paper 1042, and the cathode foil 1043 are stacked and wound into a roll.

[0031] The pressure relief unit 200 includes a pressure relief cover 201 fixedly connected to the top of the aluminum shell 101. The top of the pressure relief cover 201 is dome-shaped and protruding, and the bottom of the pressure relief cover 201 is circular and concave upward. A pressure relief groove 202 is provided on the top of the pressure relief cover 201, and the pressure relief groove 202 is arranged in a cross shape.

[0032] The core 104 is composed of an anode foil 1041, an electrolytic paper 1042, and a cathode foil 1043 that absorb electrolyte, all attached together and then wound into a cylindrical shape. The core 104 is placed at the bottom of the aluminum shell 101, which is sealed by a sealant cap 102. A guide pin 103 is used to connect electrical equipment. A pressure relief cap 201 is used to seal the top of the aluminum shell 101. When the internal pressure of the aluminum shell 101 is too high, the pressure relief cap 201 splits along the pressure relief groove 202 and divides into four equal parts to relieve pressure. The top of the pressure relief cap 201 is dome-shaped. The bottom of the pressure relief cover 201 is convex, while the top of the pressure relief cover 201 is concave, making the thickness of the pressure relief cover 201 uniform. This increases the strength of the pressure relief cover 201 without increasing its thickness. When the top of the pressure relief cover 201 is impacted, the force is dispersed along the dome-shaped surface of the pressure relief cover 201 instead of being concentrated at a single point. This disperses the impact force, thereby reducing the instantaneous pressure on the pressure relief cover 201 and increasing its strength, so as to ensure that the core 104 can operate under normal pressure.

[0033] In addition, a cross groove 203 is provided at the bottom of the pressure relief cover 201. The cross groove 203 is aligned with the pressure relief groove 202. The extended end of the cross groove 203 bends downward along the bottom surface of the pressure relief cover 201. The cross groove 203 is formed by cutting through a cross-shaped semi-circular tube.

[0034] When the top of the pressure relief cover 201 is squeezed, the gap in the pressure relief groove 202 is squeezed and narrowed, causing the inner walls of the pressure relief groove 202 to contact each other and provide support, thereby increasing the strength of the pressure relief cover 201. When the internal pressure of the aluminum shell 101 increases, the bottom of the pressure relief cover 201 is squeezed, causing the pressure relief cover 201 to expand upward and deform, thus widening the gap in the pressure relief cover 201 and causing it to crack, so as to release pressure in time. The extended end of the cross groove 203 bends along the concave surface of the bottom of the pressure relief cover 201, and the cross section of the cross groove 203 is semi-circular, so that the top of the cross groove 203 can also be arched to disperse the pressure. Furthermore, when the internal pressure of the aluminum shell 101 increases, the wall thickness between the cross groove 203 and the pressure relief groove 202 is relatively thin, which can quickly crack the pressure relief cover 201, thereby achieving the effect of the pressure relief cover 201 being hard on the outside and soft on the inside.

[0035] Furthermore, multiple copper plates 204 are fixedly connected to the top of the pressure relief cover 201, and a disc 205 is fixedly connected to the opposite ends of the multiple copper plates 204. One end of each copper plate 204 connected to the pressure relief cover 201 is folded. The disc 205 is located at the center of the top of the pressure relief cover 201, and the bottom surface of the disc 205 is a concave surface that fits the pressure relief cover 201.

[0036] The copper sheet 204 has good flexibility and can be stretched by folding one end, thereby extending the height of the disc 205. The disc 205 is located at the center of the pressure relief groove 202, and the bottom surface of the disc 205 can be closely attached to the top of the pressure relief cover 201. When the pressure relief cover 201 breaks, electrolyte and fragments are sprayed out from the center of the pressure relief cover 201. The disc 205 can block some of the electrolyte and fragments to reduce the impact force during pressure relief. When the disc 205 is impacted, the disc 205 pulls the copper sheet 204, causing the folded copper sheet 204 to be straightened by the impact force. This increases the distance between the disc 205 and the pressure relief cover 201, and minimizes the impact force of electrolyte and fragments without hindering the deformation of the pressure relief cover 201 when it breaks.

[0037] Furthermore, the top of the sealant cap 102 is dome-shaped and protrudes, and multiple reinforcing blocks 105 are fixedly connected to the top of the sealant cap 102.

[0038] The sealing cap 102 is located inside the aluminum shell 101. The top of one end of the sealing cap 102 is dome-shaped. When the pressure inside the aluminum shell 101 is too high, the dome surface of the sealing cap 102 will disperse the pressure, thereby relieving the impact force on the sealing cap 102. One side of the reinforcing block 105 is fixedly connected to the inner wall of the aluminum shell 101, thereby ensuring the strength of the bottom of the aluminum shell 101 and the sealing cap 102, so that the pressure will not penetrate the sealing cap 102.

[0039] During use, when the top of the pressure relief cover 201 is impacted, the force is dispersed along the dome-shaped surface of the pressure relief cover 201, thereby increasing the deformation resistance of the pressure relief cover 201, reducing the deformation of the pressure relief cover 201, and improving the strength of the pressure relief cover 201. The cross-section of the cross groove 203 is semi-circular, so that the top of the cross groove 203 can also be arched to disperse the pressure. When the internal pressure of the aluminum shell 101 increases, the wall thickness between the cross groove 203 and the pressure relief groove 202 is relatively thin, which can quickly break the pressure relief cover 201. When the pressure relief cover 201 breaks, the disc 205 is impacted and pulls the copper sheet 204, causing the folded copper sheet 204 to be straightened by the impact force. This can increase the distance between the disc 205 and the pressure relief cover 201, and while not hindering the deformation of the pressure relief cover 201, it minimizes the impact force of electrolyte and fragments.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A cylindrical aluminum electrolytic capacitor core package, characterized in that, include: A sealing unit (100) includes an aluminum shell (101) and a sealing cap (102) fixedly connected to the bottom of the inner cavity of the aluminum shell (101). Two guide pins (103) are riveted to the bottom of the sealing cap (102), and both guide pins (103) penetrate the sealing cap (102). The inner cavity of the aluminum shell (101) is equipped with a core (104). The core (104) includes an anode foil (1041), an electrolytic paper (1042), and a cathode foil (1043). The anode foil (1041), the electrolytic paper (1042), and the cathode foil (1043) are stacked and wound into a roll. The pressure relief unit (200) includes a pressure relief cover (201) fixedly connected to the top of the aluminum shell (101). The top of the pressure relief cover (201) is dome-shaped and the bottom of the pressure relief cover (201) is circular and concave. The top of the pressure relief cover (201) is provided with a pressure relief groove (202), which is cross-shaped.

2. The cylindrical aluminum electrolytic capacitor core package according to claim 1, characterized in that, The bottom of the pressure relief cover (201) is provided with a cross groove (203), which is aligned with the pressure relief groove (202).

3. The cylindrical aluminum electrolytic capacitor core package according to claim 2, characterized in that: The extended end of the cross groove (203) bends downward along the bottom surface of the pressure relief cover (201), and the cross groove (203) is formed by cutting through a cross-shaped semi-circular tube.

4. The cylindrical aluminum electrolytic capacitor core package according to claim 3, characterized in that: The top of the pressure relief cover (201) is fixedly connected to a plurality of copper plates (204), and the opposite ends of the plurality of copper plates (204) are fixedly connected to a disc (205). The end of each copper plate (204) connected to the pressure relief cover (201) is folded.

5. A cylindrical aluminum electrolytic capacitor core package according to claim 4, characterized in that: The disc (205) is located at the center of the top of the pressure relief cover (201), and the bottom surface of the disc (205) is a concave surface that fits the pressure relief cover (201).

6. The cylindrical aluminum electrolytic capacitor core package according to claim 1, characterized in that: The top of the sealant cap (102) is dome-shaped and protrudes, and a plurality of reinforcing blocks (105) are fixedly connected to the top of the sealant cap (102).

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