Anti-dry liquid aluminum electrolytic capacitor
The innovative design of a liquid aluminum electrolytic capacitor with a heat dissipation system and stabilization features addresses the issues of overheating and mechanical instability, ensuring reliable operation and safety.
Patent Information
- Application Number
- CN202422140050.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-02
AI Technical Summary
The existing liquid aluminum electrolytic capacitors have slow heat dissipation due to the smooth surface of the aluminum shell, and the internal electrolyte is prone to volatilization and dryness, and the core pack is prone to shake during use.
The anti-drying liquid aluminum electrolytic capacitor is designed, and the heat conduction strips and heat dissipation fins are used to enhance heat dissipation. The limit ring is used to fix the core pack, a sealing structure is set to prevent the electrolyte from leaking, and a limit sleeve and a clamp fixing connection ring and thermal strip are installed on the shell.
Effectively prevent the electrolyte from drying out, improve heat dissipation efficiency, prevent the core pack from shaking, and ensure the stable operation of the capacitor.
Smart Images
Figure CN223108691U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of capacitors, in particular to a dryness-preventing liquid aluminum electrolytic capacitor. Background Technique
[0002] An aluminum electrolytic capacitor, also known as a capacitor, is an energy storage component. Its structure can be divided into three types: fixed capacitor, semi-variable capacitor, and variable capacitor. It contains a liquid electrolyte inside. A capacitor made by inserting a bent aluminum strip as the positive electrode is called an aluminum electrolytic capacitor.
[0003] The existing liquid aluminum electrolytic capacitors generally consist of an aluminum shell and a core package arranged inside the aluminum shell. The opening of the core package in the aluminum shell is sealed by a rubber plug to prevent the electrolyte inside the aluminum shell from volatilizing or leaking. However, due to the smooth surface of the aluminum shell, during use, the heat generated by the capacitor cannot dissipate quickly, resulting in too high a temperature inside the capacitor. The electrolyte will volatilize when heated, leading to the dryness of the electrolyte and affecting the use. And due to a certain gap between the core package and the aluminum shell, during use of the capacitor, the core package will shake under the influence of polarization. For this reason, we propose a dryness-preventing liquid aluminum electrolytic capacitor. Content of the Utility Model
[0004] The purpose of the utility model is to solve the above-mentioned disadvantages in the prior art, and to propose a dryness-preventing liquid aluminum electrolytic capacitor.
[0005] To achieve the above purpose, the utility model adopts the following technical scheme: design a dryness-preventing liquid aluminum electrolytic capacitor, including a shell. Inside the shell, there is a core package. The top opening of the shell is provided with a sealing cover. The bottom edge of the sealing cover is hermetically fitted with the top of the shell. A rubber plug is installed at the bottom of the sealing cover. The rubber plug is placed inside the shell, and the side surface of the rubber plug is hermetically fitted with the inner surface of the shell;
[0006] Both ends of the side surface of the shell are sleeved with connecting rings. Between the two connecting rings, there is a heat-conducting strip. The inner surface of the heat-conducting strip is in clearance fit with the outer surface of the shell, and a number of heat-dissipating fins are installed on the outer side surface of the heat-conducting strip;
[0007] A flange is installed on the side surface of the top of the shell. The end of one of the connecting rings is connected to the bottom of the flange. A limiting sleeve is provided at the bottom of the shell. The limiting sleeve is sleeved on the bottom of the shell, and the top of the limiting sleeve is connected to the bottom of the other connecting ring;
[0008] A number of clamping blocks are installed on the inner side surface of the limiting sleeve. A circular groove is correspondingly opened on the side surface of the bottom of the shell. The clamping blocks are located in the circular groove;
[0009] A support ring is installed on the inner side of the outer shell. A limiting ring is stacked above the support ring. The inner surface of the limiting ring is provided with an inclined surface, and the lower end of the inclined surface is in clearance fit with the outer surface of the core package.
[0010] Preferably, the core package includes two aluminum foil sheets. Electrolytic paper is provided on both sides of each aluminum foil sheet, and conductive sheets are installed on the tops of the aluminum foil sheets. The tops of the conductive sheets extend outside the sealing cover, and pins are installed on the tops of each conductive sheet.
[0011] Preferably, the heat conduction strip is arranged in a spiral shape.
[0012] Preferably, a plurality of diversion grooves are equidistantly arranged at the top of the limiting ring.
[0013] Preferably, a pressure relief groove is arranged at one end of the outer shell away from the opening.
[0014] The beneficial effects of the design scheme proposed by the present utility model in the application process are as follows:
[0015] 1. By installing a heat conduction strip and heat dissipation fins on the outer surface of the outer shell, the contact area between the outer shell and the external environment can be increased, the heat dissipation can be accelerated, the electrolyte inside the outer shell can be prevented from volatilizing due to heat, and the use effect can be improved.
[0016] 2. By providing a limiting ring inside the outer shell, the core package can be limited, and during use, the core package will not be polarized and jitter, improving the use effect. Brief Description of the Drawings
[0017] Figure 1 is a structural exploded view of the present utility model;
[0018] Figure 2 is a structural schematic diagram of the present utility model;
[0019] Figure 3 is a structural schematic diagram of the outer shell of the present utility model;
[0020] Figure 4 is an installation schematic diagram of the capacitor of the present utility model;
[0021] Figure 5 is a side sectional view of the outer shell structure of the present utility model;
[0022] Figure 6 is a structural schematic diagram of the limiting ring of the present utility model.
[0023] In the figure: 1. Outer shell; 2. Flow guide groove; 3. Flange; 4. Inclined plane; 5. Pin; 6. Sealing cover; 7. Limit ring; 8. Conductive sheet; 9. Core package; 10. Aluminum foil sheet; 11. Electrolytic paper; 12. Pressure relief groove; 13. Heat dissipation fin; 14. Support ring; 15. Connection ring; 16. Rubber plug; 17. Clamping block; 18. Limit sleeve; 19. Annular clamping groove; 20. Heat conduction strip. Specific implementation mode
[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0025] Refer to Figures 1-6 , an anti-drying liquid aluminum electrolytic capacitor, which includes an outer shell 1. A core package 9 is arranged inside the outer shell 1. The core package 9 includes two aluminum foil sheets 10. Electrolytic paper 11 is arranged on both sides of each aluminum foil sheet 10. And a conductive sheet 8 is installed on the top of each aluminum foil sheet 10. The top of the conductive sheet 8 extends to the outside of the sealing cover 6. And a pin 5 is installed on the top of each conductive sheet 8. The two aluminum foil sheets 10 can be separated by the electrolytic paper 11 to prevent the two aluminum foil sheets 10 from contacting each other and short-circuiting.
[0026] The top opening of the outer shell 1 is provided with a sealing cover 6. The bottom edge of the sealing cover 6 is in sealing cooperation with the top of the outer shell 1. A rubber plug 16 is installed at the bottom of the sealing cover 6. The rubber plug 16 is placed inside the outer shell 1. And the side surface of the rubber plug 16 is in sealing cooperation with the inner surface of the outer shell 1. Under the action of the sealing cover 6 and the rubber plug 16, the opening of the outer shell 1 can be double-sealed, so that during storage or use, the electrolyte inside the outer shell 1 can be prevented from leaking;
[0027] As Figure 1 shown, connection rings 15 are sleeved on both ends of the side surface of the outer shell 1. A heat conduction strip 20 is arranged between the two connection rings 15. The inner surface of the heat conduction strip 20 is in clearance fit with the outer surface of the outer shell 1. And a number of heat dissipation fins 13 are installed on the outer side surface of the heat conduction strip 20. During actual use, the heat conduction strip 20 and the heat dissipation fins 13 will increase the contact area between the outer shell 1 and the external environment, improve the heat dissipation speed, and avoid the electrolyte from drying up due to too high temperature inside the outer shell 1;
[0028] It should be noted that the heat conduction strip 20 is spirally arranged. In this way, when the capacitors are installed in parallel, as Figure 4 shown, the heat conduction strips 20 on adjacent capacitors will be staggered and will not interfere with the installation of the capacitors.
[0029] As Figure 2As shown, a flange 3 is installed on the top side of the outer shell 1. One end of a connecting ring 15 is connected to the bottom of the flange 3. A limiting sleeve 18 is provided at the bottom of the outer shell 1. The limiting sleeve 18 is sleeved on the bottom of the outer shell 1, and the top of the limiting sleeve 18 is connected to the bottom of the other connecting ring 15. Under the action of the limiting sleeve 18 and the flange 3, the two connecting rings 15 will be fixed on the outer shell 1, and then the heat conducting strip 20 and the heat dissipating fins 13 will be fixed on the outer shell 1, which is convenient for installation. When the capacitor is damaged, the heat conducting strip 20 and the heat dissipating fins 13 can also be removed and installed on a new capacitor;
[0030] As Figure 1 shown, a number of clamping blocks 17 are installed on the inner side of the limiting sleeve 18. A circular clamping groove 19 is correspondingly opened on the bottom side of the outer shell 1. The clamping blocks 17 are located in the circular clamping groove 19. The cross-sections of the clamping blocks 17 and the circular clamping groove 19 are both arc-shaped, and the limiting sleeve 18 is made of elastic metal or elastic plastic. By moving the clamping blocks 17 into the circular clamping groove 19, the limiting sleeve 18 can be fixed on the outer shell 1, and then the connecting ring 15 and the heat conducting strip 20 are fixed.
[0031] As Figure 5 shown, a support ring 14 is installed on the inner side of the outer shell 1. A limiting ring 7 is stacked above the support ring 14. The inner surface of the limiting ring 7 is provided with an inclined surface 4. The lower end of the inclined surface 4 is in clearance fit with the outer surface of the core package 9. Under the action of the limiting ring 7, the core package 9 can be limited to prevent the core package 9 from being polarized during use.
[0032] It should be noted that, as Figure 6 shown, a number of diversion grooves 2 are equidistantly opened at the top of the limiting ring 7. The diversion grooves 2 can connect the upper and lower ends of the limiting ring 7. In this way, the electrolyte in the outer shell 1 can pass through the diversion grooves 2 and be fully distributed inside the outer shell 1 to prevent the electrolyte on the core package 9 from drying out.
[0033] Specifically, when the present utility model is installed, the limiting ring 7 is placed into the outer shell 1 so that the bottom of the limiting ring 7 contacts the support ring 14. Then the core package 9 is placed into the outer shell 1. During the process of placing the core package 9, it will pass through the limiting ring 7 and be limited by the limiting ring 7. When the core package 9 moves to a preset position inside the outer shell 1, the rubber plug 16 is inserted into the outer shell 1, and at the same time, the sealing cover 6 is covered on the top end of the outer shell 1. Then the connecting ring 15 and the heat conducting strip 20 are sleeved on the outer surface of the outer shell 1, and then the limiting sleeve 18 is sleeved on the bottom end of the outer shell 1 and fixed so that the top of the limiting sleeve 18 contacts the bottom of the connecting ring 15, completing the connection of the connecting ring 15 and the heat conducting strip 20. The heat generated by the capacitor during operation will be transferred from the outer shell 1 to the heat conducting strip 20 and dissipated to the external environment along the heat dissipating fins 13.
[0034] Furthermore, as Figure 3As shown in the figure, a pressure relief groove 12 is provided at one end of the outer shell 1 far away from the opening. When the pressure inside the outer shell 1 is too high, the pressure relief groove 12 will be damaged after the pressure exceeds the preset pressure value, and the excess pressure inside the outer shell 1 will be released. This can prevent the capacitor from exploding. In addition, the pressure relief groove 12 can also increase the contact area between one end of the outer shell 1 far away from the opening and the external environment, and can also accelerate the heat dissipation speed of the capacitor.
[0035] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.
Claims
1. A dryness-preventing liquid aluminum electrolytic capacitor, comprising a housing (1), characterized in that: Inside the housing (1), there is a core package (9). The top opening of the housing (1) is provided with a sealing cover (6). The bottom edge of the sealing cover (6) is in sealing cooperation with the top of the housing (1). A rubber plug (16) is installed at the bottom of the sealing cover (6). The rubber plug (16) is placed inside the housing (1), and the side surface of the rubber plug (16) is in sealing cooperation with the inner surface of the housing (1). Connection rings (15) are sleeved on both ends of the side surface of the housing (1). A heat conducting strip (20) is provided between the two connection rings (15). The inner surface of the heat conducting strip (20) is in clearance fit with the outer surface of the housing (1), and a number of heat dissipation fins (13) are installed on the outer side surface of the heat conducting strip (20). A flange (3) is installed on the side surface of the top of the housing (1). The end of one connection ring (15) is connected to the bottom of the flange (3). A limit sleeve (18) is provided at the bottom of the housing (1). The limit sleeve (18) is sleeved on the bottom of the housing (1), and the top of the limit sleeve (18) is connected to the bottom of the other connection ring (15). A number of clamping blocks (17) are installed on the inner side surface of the limit sleeve (18). An annular clamping groove (19) is correspondingly opened on the side surface of the bottom of the housing (1). The clamping blocks (17) are located in the annular clamping groove (19). A support ring (14) is installed on the inner side surface of the housing (1). A limit ring (7) is stacked above the support ring (14). The inner surface of the limit ring (7) is provided with an inclined surface (4). The lower end of the inclined surface (4) is in clearance fit with the outer surface of the core package (9).
2. The anti-drying liquid aluminum electrolytic capacitor according to claim 1, wherein: The core package (9) includes two aluminum foil sheets (10). Electrolytic paper (11) is provided on both sides of each aluminum foil sheet (10). Conductive sheets (8) are installed on the tops of the aluminum foil sheets (10). The tops of the conductive sheets (8) extend outside the sealing cover (6), and pins (5) are installed on the tops of each conductive sheet (8).
3. The anti-drying liquid aluminum electrolytic capacitor according to claim 1, characterized in that: The heat conducting strip (20) is helically arranged.
4. A dryness-preventing liquid aluminum electrolytic capacitor according to claim 1, characterized in that: A number of diversion grooves (2) are equidistantly opened on the top of the limit ring (7).
5. The anti-drying liquid aluminum electrolytic capacitor according to claim 1, characterized in that: A pressure relief groove (12) is opened at one end of the housing (1) far away from the opening.