An aluminum shell structure for an electrolytic capacitor

Abstract

This utility model discloses an aluminum shell structure for an electrolytic capacitor, including a capacitor core package. A shell is provided at the outer end of the core package, and a support strip is provided inside the shell. Multiple sets of support strips are arranged around the shell. A cover is provided on top of the shell, and the cover cooperates with the shell. A pressure-relief column is provided inside the cover. A protective strip is provided inside the support strip, and a protective pad is provided inside the pressure-relief column. A partition cavity is opened inside the shell, and a vent hole is opened inside the shell. A pressure relief pipe is provided at the outer end of the shell, and a movable piston is provided inside the pressure relief pipe. A pressure-applying spring is provided between the movable piston and the wall of the pressure relief pipe. A pressure relief hole is opened at one end of the pressure relief pipe. This aluminum shell structure provides better shock resistance, suppresses explosions, stabilizes rise, and improves protection capabilities.

Description

Technical Field

[0001] This utility model relates to the field of capacitor accessories technology, and more specifically, it relates to an aluminum shell structure for an electrolytic capacitor. Background Technology

[0002] Electrolytic capacitors store charge using internal electrolyte materials and are an important component of circuit equipment. The casing of an electrolytic capacitor protects the internal capacitor core, ensuring stable operation. To avoid affecting the internal materials, an aluminum casing is generally used.

[0003] The aluminum casing structure of common electrolytic capacitors is relatively simple, providing only basic protection during use. The aluminum casing is in close contact with the internal capacitor core to stabilize it and shield it from external objects. However, this tight-fitting structure offers poor shock absorption. When the electrolytic capacitor experiences a significant impact, the shock is directly transferred to the capacitor core, easily causing damage. Furthermore, due to the tight fit between the aluminum casing and the core, the casing lacks cushioning. During operation, the capacitor core generates heat, and over time, the self-repairing process of the anodic oxide film produces gas, gradually increasing the internal pressure. Once the pressure exceeds a certain threshold, the electrolytic capacitor is prone to explosion, causing damage and potentially affecting the circuitry. Additionally, prolonged high-load operation of the electrolytic capacitor generates more heat, which could lead to overheating and combustion, compromising safety. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the problems existing in the prior art, this utility model provides an aluminum shell structure for an electrolytic capacitor, thereby solving the technical problem mentioned in the background art that the aluminum shell has a simple structure and insufficient protection function.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an aluminum shell structure for an electrolytic capacitor, comprising a capacitor core package, a shell at the outer end of the capacitor core package, a support strip on the inner side of the shell, multiple sets of support strips arranged around the shell, a cover on the top of the shell, the cover cooperating with the shell, a pressure post on the inner side of the cover, a protective strip on the inner side of the support strip, and a protective pad on the inner side of the pressure post;

[0008] The housing has a partition cavity, a vent hole on the inner side of the housing, a pressure relief pipe at the outer end of the housing, a movable piston inside the pressure relief pipe, a pressure spring between the movable piston and the wall of the pressure relief pipe, and a pressure relief hole at one end of the pressure relief pipe.

[0009] The present invention is further configured such that a heat-absorbing sheet is provided on the inner side of the housing, a heat-conducting rod is provided inside the housing, a heat-conducting sheet is provided at the outer end of the housing, a heat-dissipating fin is provided on the heat-conducting sheet, one end of the heat-conducting rod is connected to the heat-absorbing sheet, and the other end is connected to the heat-dissipating fin, thereby improving the heat dissipation capacity.

[0010] The present invention is further configured such that a pin hole is provided on the cover, and a pin ring is provided at the upper end of the pin hole. The pin ring and the pin hole cooperate with the pin structure of the capacitor core package for easy assembly.

[0011] The present invention is further configured such that the housing is provided with a connecting screw, the cover is provided with an installation hole, and a connecting nut is provided on the top of the cover, the connecting nut cooperating with the connecting screw.

[0012] The present invention is further configured such that the support strip includes a bottom end strip and a side end strip, the bottom end strip is disposed on the bottom wall of the housing, and the side end strip is disposed on the side wall of the housing, so as to make the restriction more comprehensive.

[0013] The present invention is further configured such that a recessed groove is provided inside the housing, and the recessed groove cooperates with the vent hole to provide a gas flow structure.

[0014] The present invention is further configured such that the movable piston is provided with a sliding rod, and the pressure relief pipe is provided with a sliding ring, wherein the sliding rod and the sliding ring are slidably engaged to make the movement more stable.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides an aluminum shell structure for an electrolytic capacitor, which has the following advantages:

[0017] 1. The support bars, composed of bottom and side bars, cooperate with the shell to provide an external support structure inside the shell. The pressure column cooperates with the cover. When the cover is in contact with the shell, the internal support bars and pressure column cooperate with the capacitor core, avoiding close contact between the aluminum shell structure and the internal capacitor core. The protective bar and protective pad cooperate with the capacitor to provide a buffering effect, improve the shock resistance of the electrolytic capacitor, and make the equipment safer.

[0018] 2. The partition cavity provides an orifice for gas flow. The vent, pressure relief pipe, moving piston, pressure spring, and pressure relief hole work together to form a pressure relief structure. As the gas pressure inside the aluminum shell gradually increases, the gas passes through the vent and enters the pressure relief pipe, pushing the moving piston. The pressure spring controls the pressure, and before the pressure reaches a dangerous level, the moving piston moves to the other side of the pressure relief hole, releasing excess gas and maintaining internal pressure. In the event of an accidental explosion, the partition cavity divides the shell into two structures. The inner part of the shell first resists the impact; after the inner part shatters, the outer part then resists the impact, reducing damage from flying fragments and improving safety.

[0019] 3. By providing a heat-absorbing structure through heat-absorbing plates, and with the heat conduction of the heat-conducting rod, the heat-absorbing plates, heat-conducting rod, heat-conducting plates and heat dissipation fins work together to transfer the heat inside the shell to the outside and dissipate it, thereby improving the heat dissipation effect, consuming the internal heat, suppressing the rise of the internal temperature, and improving the safety capability of the equipment. Attached Figure Description

[0020] Figure 1 This is a front view of the aluminum shell structure of an electrolytic capacitor according to the present invention.

[0021] Figure 2 This is a schematic diagram of the assembly structure after the cover and shell are separated in this utility model;

[0022] Figure 3 This is a schematic diagram of the structure in which the bottom of the housing mates with the heat dissipation fins in this utility model;

[0023] Figure 4 This is a schematic diagram of the structure in which the bottom of the cover body and the pressure post cooperate.

[0024] Figure 5 This is a schematic diagram of the internal structure of the cover body of this utility model, in conjunction with the support strip and the movable piston.

[0025] In the diagram: 1. Capacitor core; 2. Housing; 3. Support bar; 4. Cover; 5. Pressure-retaining column; 6. Protective bar; 7. Protective pad; 8. Separating cavity; 9. Vent hole; 10. Pressure relief pipe; 11. Moving piston; 12. Pressure spring; 13. Pressure relief hole; 14. Heat-absorbing plate; 15. Heat-conducting rod; 16. Heat-conducting plate; 17. Heat dissipation fin; 18. Lead hole; 19. Lead ring; 20. Connecting screw; 21. Mounting hole; 22. Connecting nut; 23. Bottom strip; 24. Side strip; 25. Recessed groove; 26. Sliding rod; 27. Sliding ring. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figure 1-5 An aluminum shell structure for an electrolytic capacitor includes a capacitor core package 1, a shell 2 at the outer end of the capacitor core package 1, a support strip 3 on the inner side of the shell 2, multiple sets of support strips 3 around the shell 2, a cover 4 on the top of the shell 2, the cover 4 cooperating with the shell 2, a pressing post 5 on the inner side of the cover 4, a protective strip 6 on the inner side of the support strips 3, and a protective pad 7 on the inner side of the pressing post 5.

[0030] The housing 2 has a partition cavity 8 inside, a vent hole 9 inside the housing 2, a pressure relief pipe 10 at the outer end of the housing 2, a movable piston 11 inside the pressure relief pipe 10, a pressure spring 12 between the movable piston 11 and the wall of the pressure relief pipe 10, and a pressure relief hole 13 at one end of the pressure relief pipe 10.

[0031] In this embodiment, the capacitor core 1 cooperates with the housing 2 to provide the working effect of an electrolytic capacitor. When the capacitor core 1 is installed into the housing 2, the support bar 3 contacts the electrolytic capacitor through the protective bar 6 and supports the electrolytic capacitor. When the cover 4 is installed, the cover 4 cooperates with the housing 2 for fixation. The cover 4, with the pressure post 5, contacts the electrolytic capacitor through the protective pad 7. The pressure post 5 cooperates with the support bar 3 to clamp and restrict the electrolytic capacitor, avoiding direct contact between the electrolytic capacitor and the housing 2. When the housing 2 is impacted, the protective bar 6 and the protective pad 7 absorb part of the impact and then transmit the buffered impact force to the internal electrolytic capacitor, reducing damage.

[0032] More specifically, the partition chamber 8 provides space, and when the internal pressure increases, gas flows into the partition chamber 8 through the vent hole 9, and then enters the pressure relief pipe 10, pressurizing the moving piston 11. The pressure spring 12 pressurizes the moving piston 11, providing basic pressure to keep the moving piston 11 stable. As the other end of the pressure relief pipe 10 moves, it squeezes the pressure spring 12. Before the pressure reaches a dangerous value, the moving piston 11 will move to the other side of the pressure relief pipe 10 due to the pressure, exposing the pressure relief hole 13, allowing excess gas to be discharged from the pressure relief hole 13, thereby maintaining the internal pressure at a suitable level. In addition, in the event of an internal explosion, the partition chamber 8 divides the shell 2 into inner and outer parts. After the inner part is damaged by the explosion impact, the outer part bears the pressure, preventing the shell 2 from being damaged at once and reducing the danger caused by fragments flying outward.

[0033] Please see Figure 3 and Figure 5 As one way to improve heat dissipation: a heat-absorbing plate 14 is provided on the inner side of the housing 2, a heat-conducting rod 15 is provided inside the housing 2, a heat-conducting plate 16 is provided at the outer end of the housing 2, and heat dissipation fins 17 are provided on the heat-conducting plate 16. One end of the heat-conducting rod 15 is connected to the heat-absorbing plate 14, and the other end is connected to the heat dissipation fins 17, thereby improving the heat dissipation capacity.

[0034] Specifically, the heat-absorbing plate 14 inside the housing 2 absorbs the heat generated by the capacitor core 1 during operation, and then transfers it outward through the heat-conducting rod 15 to the heat-conducting plate 16. The heat-conducting plate 16 then distributes the heat to the heat dissipation fins 17. The heat dissipation fins 17 provide a large surface area to contact the outside air, dissipating the heat and thus consuming the heat inside the equipment and cooling the equipment.

[0035] Please see Figures 1-2 As a further embodiment of the cover: the cover 4 has a pin hole 18, and a pin ring 19 is provided at the upper end of the pin hole 18. The pin ring 19 and the pin hole 18 are matched with the pin structure of the capacitor core package 1 for easy assembly.

[0036] Specifically, during the assembly of the cover 4, space is provided by the pin hole 18 and the pin ring 19 to allow the pins of the capacitor core package 1 to pass through, thereby enabling it to connect with external circuitry.

[0037] Please see Figure 2 As a further embodiment of the housing: the housing 2 is provided with a connecting screw 20, the cover 4 is provided with a mounting hole 21, and the cover 4 is provided with a connecting nut 22, which cooperates with the connecting screw 20.

[0038] Specifically, when installing the cover 4, the mounting hole 21 is fitted onto the connecting screw 20, so that the connecting screw 20 passes through the mounting hole 21. Then, the connecting nut 22 is installed on the connecting screw 20, so that the connecting nut 22 presses and fixes the cover 4.

[0039] Please see Figure 5 As a further embodiment of the support bar: the support bar 3 includes a bottom end bar 23 and a side end bar 24. The bottom end bar 23 is disposed on the bottom wall of the housing 2, and the side end bar 24 is disposed on the side wall of the housing 2, so as to make the restriction more comprehensive.

[0040] Specifically, the bottom of the capacitor core package 1 is supported by the bottom strip 23, and the side end of the capacitor core package 1 is restricted by the side strip 24.

[0041] Please see Figure 5 As a further embodiment of the shell: a recessed groove 25 is provided in the shell 2, which cooperates with the vent hole 9 to provide a gas flow structure.

[0042] Specifically, the recessed groove 25 provides space to facilitate gas flow.

[0043] Please see Figure 3 and Figure 5 As a further embodiment of the movable piston: the movable piston 11 is provided with a sliding rod 26, and the pressure relief pipe 10 is provided with a sliding ring 27. The sliding rod 26 and the sliding ring 27 are in sliding engagement to make the movement more stable.

[0044] Specifically, the movement of the moving piston 11 and the extension and retraction of the pressure spring 12 are kept stable through the cooperation of the sliding rod 26 and the sliding ring 27.

[0045] In summary, during the use or operation of the overall equipment:

[0046] The capacitor core 1, in conjunction with the housing 2, provides the working effect of an electrolytic capacitor. When the capacitor core 1 is installed into the housing 2, the support bar 3 contacts the electrolytic capacitor via the protective bar 6. The bottom of the capacitor core 1 is supported by the bottom bar 23, and the side ends of the capacitor core 1 are restricted and supported by the side bar 24. Then, the cover 4 is installed and fastened onto the housing 2, so that the mounting hole 21 fits onto the connecting screw 20. The connecting screw 20 is passed through the mounting hole 21, and then the connecting nut 22 is installed on the connecting screw 20, pressing and fixing the cover 4 in place. 4 cooperates with the housing 2, and the cover 4 will cause the pressure post 5 to contact the electrolytic capacitor through the protective pad 7. The pressure post 5 cooperates with the support bar 3 to clamp and restrict the electrolytic capacitor, avoiding direct contact between the electrolytic capacitor and the housing 2. When the housing 2 is impacted, the protective bar 6 and the protective pad 7 will absorb part of the impact and then transfer the buffered impact force to the internal electrolytic capacitor to reduce damage. In addition, when assembling the cover 4, the lead hole 18 and the lead ring 19 cooperate to provide space so that the lead of the capacitor core 1 passes through the lead hole 18 and the lead ring 19, thereby cooperating with the external circuit.

[0047] When the electrolytic capacitor is working, space is provided by the partition chamber 8 and the recessed groove 25 to facilitate gas flow. When the internal pressure increases, gas enters the recessed groove 25, flows into the partition chamber 8 through the vent hole 9, and then enters the pressure relief pipe 10, pressurizing the moving piston 11. The pressure spring 12 also applies pressure to the moving piston 11, providing basic pressure to keep the moving piston 11 stable. As the other end of the pressure relief pipe 10 moves, it compresses the pressure spring 12. Through the cooperation of the sliding rod 26 and the sliding ring 27, the movement of the moving piston 11 and the extension and retraction of the pressure spring 12 remain stable. Before the pressure reaches a dangerous value, the moving piston 11 will move to the other side of the pressure relief pipe 10 due to the pressure, exposing the pressure relief hole 13. Excess gas is discharged through the pressure relief hole 13, thereby maintaining the internal pressure at a suitable level. In addition, in the event of an internal explosion, the partition cavity 8 divides the shell 2 into inner and outer parts. After the inner part is damaged by the explosion impact, the outer part bears the pressure, preventing the shell 2 from being damaged at once and reducing the danger caused by fragments flying outward. In addition, during the operation of the equipment, the heat generated by the capacitor core 1 is absorbed inside the shell 2 by the heat absorption plate 14, and then transferred to the heat conduction plate 16 through the heat conduction rod 15. The heat conduction plate 16 then distributes the heat to the heat dissipation fins 17. The heat dissipation fins 17 provide a large surface area to contact the outside air, dissipating the heat and thus consuming the heat inside the equipment and cooling the equipment.

[0048] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. An electrolytic capacitor aluminum case structure comprising a capacitor core package (1), the capacitor core package (1) being provided with a case (2) at an outer end, characterized in that: The inner side of the housing (2) is provided with a support strip (3), and multiple sets of the support strip (3) are arranged around the housing (2). The top of the housing (2) is provided with a cover (4), which cooperates with the housing (2). The inner side of the cover (4) is provided with a pressing post (5), the inner side of the support strip (3) is provided with a protective strip (6), and the inner side of the pressing post (5) is provided with a protective pad (7). The housing (2) has a partition cavity (8) inside, a vent hole (9) is provided on the inner side of the housing (2), a pressure relief pipe (10) is provided at the outer end of the housing (2), a moving piston (11) is provided inside the pressure relief pipe (10), a pressure spring (12) is provided between the moving piston (11) and the wall of the pressure relief pipe (10), and a pressure relief hole (13) is provided at one end of the pressure relief pipe (10).

2. An electrolytic capacitor aluminum case structure according to claim 1, characterized by: The inner side of the housing (2) is provided with a heat-absorbing plate (14), the inner side of the housing (2) is provided with a heat-conducting rod (15), the outer end of the housing (2) is provided with a heat-conducting plate (16), the heat-conducting plate (16) is provided with heat dissipation fins (17), one end of the heat-conducting rod (15) is connected to the heat-absorbing plate (14), and the other end is connected to the heat dissipation fins (17).

3. An electrolytic capacitor aluminum case structure according to claim 1, characterized by: The cover (4) has a pin hole (18) and a pin ring (19) at the upper end of the pin hole (18). The pin ring (19) and the pin hole (18) are matched with the pin structure of the capacitor core (1).

4. An electrolytic capacitor aluminum case structure according to claim 3, characterized by: The housing (2) is provided with a connecting screw (20), the cover (4) is provided with an installation hole (21), and the cover (4) is provided with a connecting nut (22) on top of it. The connecting nut (22) cooperates with the connecting screw (20).

5. An electrolytic capacitor aluminum case structure according to claim 1, characterized by: The support bar (3) includes a bottom bar (23) and a side bar (24). The bottom bar (23) is disposed on the bottom wall of the housing (2), and the side bar (24) is disposed on the side wall of the housing (2).

6. An electrolytic capacitor aluminum case structure according to claim 1, characterized by: The housing (2) has a recessed groove (25) inside, which is matched with the vent (9).

7. An electrolytic capacitor aluminum case structure according to claim 1, characterized by: The movable piston (11) is provided with a sliding rod (26), and the pressure relief pipe (10) is provided with a sliding ring (27). The sliding rod (26) and the sliding ring (27) are in sliding cooperation.

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