High-voltage aluminum electrolytic capacitor

Abstract

The invention relates to the technical field of power electronics, and discloses a high-voltage aluminum electrolytic capacitor, which comprises a capacitor main body, the outer surface of the capacitor main body is fixedly connected with a cathode pin and an anode pin, the outer surface of the capacitor main body is provided with an inner concave surface, and the outer surface of the inner concave surface is clamped with a leakage-proof mechanism. A heat dissipation mechanism is clamped in the capacitor main body, a protection mechanism is fixedly connected to the outer surface of the capacitor main body, the leakage-proof mechanism is used for overall leakage prevention through a sleeve shell, independent drainage is carried out on pins, leaks are separated by using rib plates, and a gas monitor and a rubber air bag are further arranged; the heat dissipation mechanism sleeve shell prevents leakage, and meanwhile, heat dissipation fins are arranged at the top for heat dissipation; the protection mechanism elastically supports and fixes the capacitor during leakage, prevents displacement of the capacitor from damaging a circuit board, can physically separate leaks, and guarantees the stability and safety of a circuit in an omnibearing manner.

Description

Technical Field

[0001] The present invention relates to the technical field of power electronics, and particularly to a high-voltage aluminum electrolytic capacitor. Background Art

[0002] In electronic devices, high-voltage aluminum electrolytic capacitors are widely used in many fields such as power electronics, communications, and industrial control; with characteristics such as high withstand voltage and large capacitance, they undertake key tasks such as filtering and energy storage in various circuits; however, during the actual use of high-voltage aluminum electrolytic capacitors, the leakage problem has always been a major hidden danger affecting their performance and reliability.

[0003] The patent application with the application number CN202022091399.2 discloses a high-voltage aluminum electrolytic capacitor, including a housing. The housing is cylindrical. A ring is provided at the central position inside the housing. A plurality of heat dissipation holes are opened on the circumferential outer wall of the ring. A plurality of arc-shaped plates are provided inside the ring. A plurality of springs are provided on the outer wall of the arc-shaped plates. The plurality of arc-shaped plates enclose a circular structure, and a capacitor body is installed at the middle position. A top cover is provided at the top of the housing. A through hole is opened at the central position on the upper surface of the top cover. A heat dissipation plate is provided in the through hole. A plurality of heat conduction columns are provided at the edge near the lower surface of the heat dissipation plate.

[0004] However, this patent also has the following deficiencies. That is, in a high-voltage, high-current or high-temperature environment, the sealing structure of the high-voltage aluminum electrolytic capacitor is prone to aging, resulting in electrolyte leakage, corroding the circuit board and components, causing a short circuit and making the circuit system fail; the pins are common leakage points, and their leakage is likely to cause the pins to be connected together, affecting the circuit stability. In view of this situation, a high-voltage aluminum electrolytic capacitor is specifically proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-voltage aluminum electrolytic capacitor to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solution: A high-voltage aluminum electrolytic capacitor, including a capacitor body. The outer surface of the capacitor body is fixedly connected with a cathode pin and an anode pin. An inner concave surface is provided on the outer surface of the capacitor body. A leakage prevention mechanism is clamped on the outer surface of the inner concave surface. A heat dissipation mechanism is clamped inside the capacitor body. A protection mechanism is fixedly connected to the outer surface of the capacitor body. The leakage prevention mechanism includes: A housing. A leakage groove one and a leakage groove two are opened inside the housing. A rib plate is fixedly connected to the inner wall of the housing. A first block is clamped inside the housing. A rubber airbag is fixedly connected to the outer surface of the first block. Convex points are provided on the inner wall of the rubber airbag. A gas monitor is fixedly connected to the inner wall of the rubber airbag. The convex points are used to protect the gas monitor.

[0007] According to the above technical solution, the capacitor body is inserted into the housing, the outer surface of the rib plate is in contact with the outer surface of the concave surface, there are two rib plates symmetrically arranged, and the rib plates are used to fix the housing.

[0008] According to the above technical solution, the outer surface of the rubber airbag is flush with the upper surface of the housing, the first leakage groove is sleeved with the cathode pin, the second leakage groove is sleeved with the anode pin, the first leakage groove is used to protect the cathode pin, and the second leakage groove is used to protect the anode pin.

[0009] According to the above technical solution, the heat dissipation mechanism includes a through-hole heat conducting plate. A first convex groove is provided inside the housing, and the first convex groove is clamped with the through-hole heat conducting plate. A heat conducting clamping plate is clamped inside the first convex groove. The outer surface of the heat conducting clamping plate is fixedly connected with an upper heat sink. The outer surface of the upper heat sink is clamped with a first clamping ring. The lower surface of the heat conducting clamping plate is fixedly connected with a lower heat sink. The outer surface of the lower heat sink is clamped with a second clamping ring. The upper heat sink and the lower heat sink are used to dissipate heat from the heat conducting clamping plate. According to the above technical solution, the heat dissipation mechanism further includes a first through-hole frame. A first through groove is provided inside the housing, and the first through groove is fixedly connected with the first through-hole frame. An inorganic film is fixedly connected inside the first through groove. A second through-hole frame is fixedly connected inside the first through groove. The inorganic film is used to dissipate heat from the housing.

[0010] According to the above technical solution, the lower surface of the through-hole heat conducting plate is in contact with the upper surface of the capacitor body. The through-hole heat conducting plate is clamped with the heat conducting clamping plate. The lower surface of the second clamping ring is flush with the upper surface of the first through groove. The outer surface of the first through-hole frame is in contact with the inner surface of the inorganic film. The outer surface of the inorganic film is in contact with the inner surface of the second through-hole frame. The first clamping ring is used to fix the upper heat sink, and the second clamping ring is used to fix the lower heat sink.

[0011] According to the above technical solution, the protection mechanism includes an annular heat dissipation plate. The annular heat dissipation plate is fixedly connected to the outer surface of the housing. The outer surface of the annular heat dissipation plate is fixedly connected with a first annular telescopic plate. The upper surface of the first annular telescopic plate is fixedly connected with a rubber sleeve ring. The lower surface of the rubber sleeve ring is fixedly connected with a first spring and a second annular telescopic plate. The second annular telescopic plate is used to protect the first spring.

[0012] According to the above technical solution, the upper surface of the annular heat sink is flush with the lower surface of the through groove 1, the lower surface of the first spring is fixedly connected to the upper surface of the annular heat sink, the lower surface of the second annular telescopic plate is fixedly connected to the upper surface of the annular heat sink, the rubber ring is flush with the lower surfaces of the cathode pin and the anode pin, and the first annular telescopic plate and the second annular telescopic plate are used to protect the cathode pin and the anode pin.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This type of high-voltage aluminum electrolytic capacitor is equipped with a leakage prevention mechanism and a shell on the surface of the capacitor to avoid leakage risks as a whole. At the same time, the pins, which are prone to leakage, are drained separately to prevent pin leakage. A high-precision gas monitor is installed on the top to monitor whether there is gas leakage in real time. Once an abnormality is detected, an alarm will be given immediately. It is also equipped with a special rubber airbag, which can expand rapidly when a leak occurs, effectively accommodating the leaked material and minimizing the risk of leakage.

[0014] 2. This type of high-voltage aluminum electrolytic capacitor has a leakage prevention mechanism that drains the two pins separately to ensure that once leakage occurs, it can be discharged along a specific path. By installing ribs, the material leaking from the pins can be effectively separated to avoid the pins being connected due to leakage, thereby preventing short-circuit failures, fully protecting circuit boards and other electrical components, and greatly improving the reliability and safety of the entire circuit system.

[0015] 3. This type of high-voltage aluminum electrolytic capacitor is set as a heat dissipation mechanism. While covering the surface of the capacitor with a shell to avoid leakage risks in all directions, it also takes into account the heat dissipation needs. A heat sink is installed separately on the top of the capacitor, which is a key heating area. It has a large heat dissipation area and can quickly dissipate the heat accumulated on the top, effectively reducing the operating temperature of the capacitor and ensuring its stable operation under various working conditions.

[0016] 4. This type of high-voltage aluminum electrolytic capacitor is equipped with a protective mechanism. When leakage occurs, the protective mechanism will hold the capacitor firmly in an elastic manner to cushion possible impacts and prevent the capacitor from directly damaging the circuit board due to displacement. It can also physically separate the leaking capacitor and use a special barrier structure to limit the leakage to a specific area, thereby protecting the circuit board in all directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a cross-sectional view of the main structure of the present invention; Figure 3 The structural section of the anti-leakage mechanism of the present invention is Figure 1 ; Figure 4 Structural cross-section of the anti-leakage mechanism of the present invention Figure 2 ; Figure 5 is Figure 4 the enlarged structural cross-sectional view of part A in Figure 6 Structural cross-sectional view of the heat dissipation mechanism of the present invention; Figure 7 is Figure 6 the enlarged structural cross-sectional view of part B in Figure 8 Partial structural schematic diagram of the heat dissipation mechanism of the present invention; Figure 9 Structural cross-sectional view of the protection mechanism of the present invention.

[0018] In the figure: 1. Capacitor main body; 2. Cathode pin; 3. Anti-leakage mechanism; 301. Housing; 302. Leakage groove 1; 303. Leakage groove 2; 304. Rib plate; 305. First fixture block; 306. Rubber airbag; 307. Convex point; 308. Gas monitor; 4. Anode pin; 5. Concave surface; 6. Heat dissipation mechanism; 601. Convex groove 1; 602. Through-hole heat conducting plate; 603. Heat conducting fixture block; 604. Upper heat sink; 605. First snap ring; 606. Lower heat sink; 607. Second snap ring; 608. Through groove 1; 609. Through-hole bracket 1; 610. Inorganic film; 611. Through-hole bracket 2; 7. Protection mechanism; 701. Ring-shaped heat conducting plate; 702. First ring-shaped telescopic plate; 703. Rubber sleeve ring; 704. First spring; 705. Second ring-shaped telescopic plate. Specific embodiments

[0019] 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.

[0020] Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0021] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Embodiment 1: Refer to Figures 1 - 5 , the present invention provides a technical solution: a high-voltage aluminum electrolytic capacitor, including a capacitor body 1, a cathode pin 2 and an anode pin 4 are fixedly connected to the outer surface of the capacitor body 1, an inner concave surface 5 is arranged on the outer surface of the capacitor body 1, a leakage prevention mechanism 3 is clamped on the outer surface of the inner concave surface 5, a heat dissipation mechanism 6 is clamped inside the capacitor body 1, a protection mechanism 7 is fixedly connected to the outer surface of the capacitor body 1, and the leakage prevention mechanism 3 includes: A housing 301, a first leakage groove 302 and a second leakage groove 303 are formed inside the housing 301, a rib plate 304 is fixedly connected to the inner wall of the housing 301, a first clamping block 305 is clamped inside the housing 301, a rubber airbag 306 is fixedly connected to the outer surface of the first clamping block 305, bump points 307 are arranged on the inner wall of the rubber airbag 306, and a gas monitor 308 is fixedly connected to the inner wall of the rubber airbag 306. The bump points 307 are used to protect the gas monitor 308.

[0023] The capacitor body 1 is inserted into the housing 301, the outer surface of the rib plate 304 is in contact with the outer surface of the inner concave surface 5, and two rib plates 304 are symmetrically arranged. The rib plates 304 are used to fix the housing 301.

[0024] The outer surface of the rubber airbag 306 is flush with the upper surface of the housing 301. The first leakage groove 302 is sleeved with the cathode pin 2, and the second leakage groove 303 is sleeved with the anode pin 4. The first leakage groove 302 is used to protect the cathode pin 2, and the second leakage groove 303 is used to protect the anode pin 4. The rib plates 304 are symmetrically arranged, so that the gap between the housing 301 and the capacitor body 1 is divided into a cathode chamber and an anode chamber. While the rubber airbag 306 is used to accommodate gas, when the leakage is excessive, it can also accommodate liquid, preventing excessive extrusion of the housing 301, thereby avoiding damage to the circuit board. The bump points 307 reduce the rubber expansion amount around the gas monitor 308, thereby realizing the protection of the gas monitor 308. And the rubber airbag 306 is made of fluororubber, which can provide good protection and accommodation functions.

[0025] The working principle of this embodiment is as follows: When using this type of high-voltage aluminum electrolytic capacitor, the capacitor body 1 is pushed into the top of the housing 301, and is clamped by the rib plate 304. The cathode pin 2 and the anode pin 4 are sleeved with the housing 301, and the sleeving directions of the cathode pin 2 and the anode pin 4 are at a 90° angle to the clamping direction of the rib plate 304, so that the housing 301 is fixed on the outer surface of the capacitor body 1. At this time, the first clamping block 305 is clamped with the housing 301 and the rubber airbag 306 is flush with the upper surface of the housing 301. At the same time, the cathode pin 2 and the anode pin 4 are connected to the circuit board for using the capacitor. When the capacitor body 1 leaks, if the leaking part is the cathode pin 2 or the anode pin 4, the leaking gas and liquid are guided through the first leakage groove 302 or the second leakage groove 303, and flow into the cathode cavity and the anode cavity. The rib plate 304 divides the cathode cavity and the anode cavity, so that the leaking liquid and gas do not directly connect the cathode pin 2 and the anode pin 4, protecting the circuit board and other components while preventing the capacitor body 1 from short-circuiting. At the same time when the gas leaks, the rubber airbag 306 accommodates the gas, and the gas monitor 308 at the top monitors the leaking gas. When the leaking gas is detected, it gives an alarm to the outside and stops the operation of the circuit board to protect the circuit board.

[0026] Embodiment 2: Please refer to Figures 6 - 9 , on the basis of Embodiment 1, the present invention provides a technical solution: a heat dissipation mechanism 6, the heat dissipation mechanism 6 includes a through-hole heat conduction plate 602, a first convex groove 601 is opened inside the housing 301, the first convex groove 601 is clamped with the through-hole heat conduction plate 602, a heat conduction clamping plate 603 is clamped inside the first convex groove 601, an upper heat sink 604 is fixedly connected to the outer surface of the heat conduction clamping plate 603, a first clamping ring 605 is clamped on the outer surface of the upper heat sink 604, a lower heat sink 606 is fixedly connected to the lower surface of the heat conduction clamping plate 603, a second clamping ring 607 is clamped on the outer surface of the lower heat sink 606, and the upper heat sink 604 and the lower heat sink 606 are used to dissipate heat from the heat conduction clamping plate 603.

[0027] The heat dissipation mechanism 6 further includes a first through-hole frame 609, a first through groove 608 is opened inside the housing 301, the first through groove 608 is fixedly connected to the first through-hole frame 609, an inorganic film 610 is fixedly connected inside the first through groove 608, a second through-hole frame 611 is fixedly connected inside the first through groove 608, and the inorganic film 610 is used to dissipate heat from the housing 301.

[0028] The lower surface of the through-hole heat conducting plate 602 is in contact with the upper surface of the capacitor body 1. The through-hole heat conducting plate 602 is clamped with the heat conducting clamping plate 603. The lower surface of the second clamping ring 607 is flush with the upper surface of the first through groove 608. The outer surface of the first through-hole frame 609 is in contact with the inner surface of the inorganic film 610. The outer surface of the inorganic film 610 is in contact with the inner surface of the second through-hole frame 611. The first clamping ring 605 is used to fix the upper heat sink 604. The second clamping ring 607 is used to fix the lower heat sink 606. While the first through-hole frame 609 and the second through-hole frame 611 support the inorganic film 610, when the liquid squeezes the inorganic film 610, the inorganic film 610 will not disintegrate, and the external second through-hole frame 611 blocks the impact of solid particles from external objects, realizing double protection inside and outside the inorganic film 610.

[0029] The protection mechanism 7 includes an annular heat conducting plate 701. The annular heat conducting plate 701 is fixedly connected to the outer surface of the housing 301. A first annular telescopic plate 702 is fixedly connected to the outer surface of the annular heat conducting plate 701. A rubber sleeve ring 703 is fixedly connected to the upper surface of the first annular telescopic plate 702. A first spring 704 and a second annular telescopic plate 705 are fixedly connected to the lower surface of the rubber sleeve ring 703. The second annular telescopic plate 705 is used to protect the first spring 704.

[0030] The upper surface of the annular heat conducting plate 701 is flush with the lower surface of the first through groove 608. The lower surface of the first spring 704 is fixedly connected to the upper surface of the annular heat conducting plate 701. The lower surface of the second annular telescopic plate 705 is fixedly connected to the upper surface of the annular heat conducting plate 701. The rubber sleeve ring 703 is flush with the lower surfaces of the cathode pin 2 and the anode pin 4. The first annular telescopic plate 702 and the second annular telescopic plate 705 are used to protect the cathode pin 2 and the anode pin 4. When leakage occurs, the leakage on one side will impact the cavity between the capacitor body 1 and the housing 301, causing the capacitor body 1 to move relatively and damaging the circuit board. At this time, through the cooperation of the rubber sleeve ring 703 and the first spring 704, through the reverse deformation of the first spring 704, the impact is offset, realizing auxiliary protection for the circuit board.

[0031] The working principle of this embodiment is as follows: When using this type of high-voltage aluminum electrolytic capacitor, during installation, the cathode pin 2 and the anode pin 4 are connected to the circuit board. At this time, the first spring 704 pushes the rubber sleeve ring 703 to contact the surface of the circuit board, and through the first annular expansion plate 702 and the second annular expansion plate 705, the part where the cathode pin 2 and the anode pin 4 are connected is segmented, so as to ensure the overall protection of the circuit board in case of leakage. The through-hole heat conduction plate 602 conducts the heat at the top to the upper heat sink 604 and the lower heat sink 606 through the heat conduction card plate 603 for heat dissipation. The gas inside the housing 301 is replaced through the first through groove 608, and the inorganic membrane 610 blocks the liquid inside the housing 301 and the solid outside the housing 301, so that in case of leakage, the liquid will not flow out of the housing 301, and the solid will not enter the inside of the housing 301 to cause dust accumulation during heat dissipation. The first snap ring 605 and the second snap ring 607 limit the upper heat sink 604 and the lower heat sink 606. In case of leakage, the gas and liquid leak, and the inorganic membrane 610 is supported by the first through-hole frame 609 and the second through-hole frame 611, so that it will not disintegrate when bearing the liquid pressure, thus realizing the accommodation of the liquid and discharging the gas from the housing 301. When the liquid completely exceeds the height of the first through groove 608 and the gas cannot be discharged, it is accommodated and warned in the direction of the first embodiment, so as to realize the protection of the circuit board and other components.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-voltage aluminum electrolytic capacitor, comprising a capacitor body (1), the outer surface of the capacitor body (1) being fixedly connected with a cathode pin (2) and an anode pin (4), the outer surface of the capacitor body (1) being provided with an inner concave surface (5), the outer surface of the inner concave surface (5) being clamped with an anti-leakage mechanism (3), the interior of the capacitor body (1) being clamped with a heat dissipation mechanism (6), the outer surface of the capacitor body (1) being fixedly connected with a protection mechanism (7), characterized in that: The anti-leakage mechanism (3) comprises: A shell (301), wherein a leakage groove 1 (302) and a leakage groove 2 (303) are provided inside the shell (301), a rib plate (304) is fixedly connected to the inner wall of the shell (301), a first clamping block (305) is clamped inside the shell (301), a rubber airbag (306) is fixedly connected to the outer surface of the first clamping block (305), a convex point (307) is provided on the inner wall of the rubber airbag (306), a gas monitor (308) is fixedly connected to the inner wall of the rubber airbag (306), and the convex point (307) is used to protect the gas monitor (308).

2. A high voltage aluminum electrolytic capacitor according to claim 1, characterized in that: The capacitor body (1) is plugged into the housing (301), the outer surface of the rib plate (304) is in contact with the outer surface of the inner concave surface (5), two rib plates (304) are symmetrically arranged, and the rib plates (304) are used to fix the housing (301).

3. The high voltage aluminum electrolytic capacitor according to claim 1, characterized in that: The outer surface of the rubber airbag (306) is flush with the upper surface of the shell (301); the leakage groove 1 (302) is sleeved with the cathode pin (2); the leakage groove 2 (303) is sleeved with the anode pin (4); the leakage groove 1 (302) is used to protect the cathode pin (2); and the leakage groove 2 (303) is used to protect the anode pin (4).

4. The high voltage aluminum electrolytic capacitor according to claim 1, characterized in that: The heat dissipation mechanism (6) comprises a through-hole heat-conducting plate (602); a convex groove (601) is provided inside the shell (301); the convex groove (601) is clamped with the through-hole heat-conducting plate (602); a heat-conducting card plate (603) is clamped inside the convex groove (601); an upper heat sink (604) is fixedly connected to the outer surface of the heat-conducting card plate (603); a first clamping ring (605) is clamped to the outer surface of the upper heat sink (604); a lower heat sink (606) is fixedly connected to the lower surface of the heat-conducting card plate (603); a second clamping ring (607) is clamped to the outer surface of the lower heat sink (606); the upper heat sink (604) and the lower heat sink (606) are used to dissipate heat from the heat-conducting card plate (603).

5. A high voltage aluminum electrolytic capacitor according to claim 4, characterized in that: The heat dissipation mechanism (6) also includes a through hole frame 1 (609), a through slot 1 (608) is provided inside the shell (301), the through slot 1 (608) is fixedly connected to the through hole frame 1 (609), an inorganic film (610) is fixedly connected inside the through slot 1 (608), a through hole frame 2 (611) is fixedly connected inside the through slot 1 (608), and the inorganic film (610) is used to dissipate heat from the shell (301).

6. A high voltage aluminum electrolytic capacitor according to claim 5, characterized in that: The lower surface of the through-hole heat conductive plate (602) is in contact with the upper surface of the capacitor body (1), the through-hole heat conductive plate (602) is clamped with the heat conductive clamping plate (603), the lower surface of the second clamping ring (607) is flush with the upper surface of the through groove (608), the outer surface of the through-hole frame (609) is in contact with the inner surface of the inorganic film (610), the outer surface of the inorganic film (610) is in contact with the inner surface of the through-hole frame (611), the first clamping ring (605) is used to fix the upper heat sink (604), and the second clamping ring (607) is used to fix the lower heat sink (606).

7. The high voltage aluminum electrolytic capacitor according to claim 5, characterized in that: The protection mechanism (7) comprises an annular heat dissipation plate (701), the annular heat dissipation plate (701) being fixedly connected to the outer surface of the housing (301), the outer surface of the annular heat dissipation plate (701) being fixedly connected to a first annular telescopic plate (702), the upper surface of the first annular telescopic plate (702) being fixedly connected to a rubber sleeve (703), the lower surface of the rubber sleeve (703) being fixedly connected to a first spring (704) and a second annular telescopic plate (705), the second annular telescopic plate (705) being used to protect the first spring (704).

8. The high voltage aluminum electrolytic capacitor according to claim 7, characterized in that: The upper surface of the annular heat sink (701) is flush with the lower surface of the through slot 1 (608); the lower surface of the first spring (704) is fixedly connected to the upper surface of the annular heat sink (701); the lower surface of the second annular telescopic plate (705) is fixedly connected to the upper surface of the annular heat sink (701); the rubber sleeve (703) is flush with the lower surfaces of the cathode pin (2) and the anode pin (4); and the first annular telescopic plate (702) and the second annular telescopic plate (705) are used to protect the cathode pin (2) and the anode pin (4).

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