An electrolytic capacitor aluminum case cover plate

Abstract

The application belongs to the field of capacitor accessories, in particular to an electrolytic capacitor aluminum shell cover plate, which comprises an electrolytic capacitor body; a protective heat dissipation mechanism is arranged on the outer side of the electrolytic capacitor body; the protective heat dissipation mechanism comprises an inner protective layer, the inner protective layer is sleeved on the outer side of the electrolytic capacitor body, a first flame-retardant layer is fixedly connected to the outer side of the inner protective layer, a second flame-retardant layer is fixedly connected to the outer side of the first flame-retardant layer, a heat insulation layer is fixedly connected to the outer side of the second flame-retardant layer, a buffer layer is fixedly connected to the outer side of the heat insulation layer, a heat dissipation assembly is arranged at the top end of the electrolytic capacitor body, a connecting assembly is arranged between the heat dissipation assembly and the second flame-retardant layer, and a positioning assembly is arranged between the heat dissipation assembly and the heat insulation layer, so that the protective heat dissipation mechanism can further protect the electrolytic capacitor body.

Description

Technical Field

[0001] This invention relates to the field of capacitor accessories, specifically an aluminum shell cover for an electrolytic capacitor. Background Technology

[0002] Electrolytic capacitors contain an electrolyte material that stores charge. They have positive and negative polarities, similar to batteries, and cannot be connected in reverse. The positive electrode is a metal plate with an oxide film, and the negative electrode is connected to the electrolyte (solid or non-solid) through the metal plate. To protect electrolytic capacitors, an aluminum shell cover is usually placed on the outside of the capacitor to protect it.

[0003] Existing electrolytic capacitors are protected from impacts and scratches by having an aluminum shell cover on the outside. This prevents the electrolytic capacitor from being damaged by external scratches and impacts, which could lead to leakage and damage to the substrate and other electrical components.

[0004] Existing aluminum casing covers for electrolytic capacitors can only protect the outer surface of the capacitor from minor scratches and impacts. When the capacitor is subjected to a heavier impact or when the internal heat generated by high load operation is high, the electrolytic capacitor is prone to damage, spontaneous combustion, or explosion. Therefore, an aluminum casing cover for electrolytic capacitors is proposed to address the above problems. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, most existing aluminum shell covers for electrolytic capacitors can only protect the outer side of the electrolytic capacitor from minor scratches and impacts. When the electrolytic capacitor is subjected to a heavier impact or when the heat generated inside due to high load operation is high, the electrolytic capacitor is prone to damage, spontaneous combustion or explosion. This invention proposes an aluminum shell cover for electrolytic capacitors.

[0006] The technical solution adopted by the present invention to solve its technical problem is: an aluminum shell cover plate for an electrolytic capacitor, comprising an electrolytic capacitor body; a protective heat dissipation mechanism is provided on the outer side of the electrolytic capacitor body;

[0007] The protective heat dissipation mechanism includes an inner protective layer, which is sleeved on the outside of the electrolytic capacitor body. A first flame-retardant layer is fixedly connected to the outside of the inner protective layer, a second flame-retardant layer is fixedly connected to the outside of the first flame-retardant layer, a heat insulation layer is fixedly connected to the outside of the second flame-retardant layer, and a buffer layer is fixedly connected to the outside of the heat insulation layer. A heat dissipation component is provided at the top of the electrolytic capacitor body, a connecting component is provided between the heat dissipation component and the second flame-retardant layer, and a positioning component is provided between the heat dissipation component and the heat insulation layer.

[0008] Preferably, the inner protective layer is made of polytetrafluoroethylene, the first flame retardant layer is made of glass fiber, the second flame retardant layer is made of alumina fiber, the heat insulation layer is made of aluminum alloy, and the buffer layer is made of EVA.

[0009] Preferably, the heat dissipation component includes a top protective layer, which is tightly attached to the top of the electrolytic capacitor body, and a top cover plate is fixedly connected to the top of the top protective layer. A heat dissipation module is provided on the top of the top cover plate.

[0010] Preferably, the connecting component includes a movable groove, which is opened on both sides of the bottom end of the top cover plate, and a spring is provided inside the movable groove. A movable block is slidably connected inside the movable groove, and a first locking block is fixedly connected to the bottom end of the movable block. The first locking block is inserted into the inside of a first locking slot, which is opened on both sides of the top end of the second flame retardant layer.

[0011] Preferably, the side of the spring closest to the moving block is fixedly connected to the moving block, and the side of the spring furthest from the moving block is fixedly connected to the inner wall of the moving groove.

[0012] Preferably, the positioning component includes a slot, which is formed on both sides of the top of the heat insulation layer, and an insert block is sleeved inside the slot. The insert block is fixedly connected to the bottom of the top protective layer. A second locking block is glued to both sides of the inner wall of the slot near the bottom. The second locking block is made of rubber. A second locking groove is formed on both sides of the insert block near the bottom. The second locking groove engages with the second locking block. A third locking groove is glued to both sides of the slot near the top. The third locking groove is made of rubber. A third locking groove is formed on both sides of the insert block near the top. The third locking groove engages with the third locking block.

[0013] Preferably, the heat dissipation module includes a thermal pad, which is glued to the center of the top of the top cover plate, and the top of the thermal pad is fixedly connected to the bottom of the heat dissipation fins. Connecting rods are fixedly connected to both sides of the top of the top of the top cover plate, and the top of the connecting rods passes through the heat dissipation fins and extends to the outside of the heat dissipation fins. A threaded sleeve is threaded to the outside of the connecting rod, and a pad is glued to the bottom of the threaded sleeve, and the pad abuts against the heat dissipation fins.

[0014] Preferably, the outer side of the threaded sleeve is glued with an anti-slip sleeve, the outer side of the anti-slip sleeve is provided with anti-slip texture, and both the anti-slip sleeve and the pad are made of rubber.

[0015] The advantages of this invention are:

[0016] 1. This invention, through the structural design of the protective heat dissipation mechanism, achieves further protection for the electrolytic capacitor body. The inner and top protective layers, made of polytetrafluoroethylene (PTFE), provide insulation. PTFE also possesses excellent high-temperature resistance, capable of withstanding the heat emitted by the electrolytic capacitor body during operation without burning or melting. The first flame-retardant layer made of glass fiber and the second flame-retardant layer made of alumina fiber enhance the overall flame-retardant capability of the protective heat dissipation mechanism. Both glass and alumina materials can withstand high temperatures without softening or burning. Furthermore, glass fiber is a non-flammable material... The flammable material can effectively block the combustion of flames. The use of aluminum alloy buffer layer and top cover plate enhances the overall impact resistance of the protective heat dissipation mechanism. The use of EVA material buffer layer further enhances the overall impact resistance of the protective heat dissipation mechanism. EVA material has effective impact resistance and can effectively buffer the impact received, thereby protecting the electrolytic capacitor body inside the protective heat dissipation mechanism. This solves the problem that most existing aluminum shell covers for electrolytic capacitors can only protect the outer side of the electrolytic capacitor from minor scratches and collisions. When the electrolytic capacitor is subjected to a heavier impact, it is easy to damage the electrolytic capacitor.

[0017] 2. Through the structural design of the heat dissipation component, this invention enhances the heat dissipation effect of the protective heat dissipation mechanism, solving the problem that most existing aluminum shell covers for electrolytic capacitors can only protect against minor scratches and impacts to the outside of the electrolytic capacitor. When the heat generated inside the electrolytic capacitor due to high load operation is high, it is easy for the electrolytic capacitor to spontaneously combust or explode, thus improving the stability of the electrolytic capacitor body during operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of Example 1;

[0020] Figure 2 This is a frontal cross-sectional three-dimensional structural schematic diagram of Embodiment 1;

[0021] Figure 3 Example 1 Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 4 Example 1 Figure 3 Enlarged structural diagram at point B;

[0023] Figure 5 This is a top-view cross-sectional three-dimensional structural schematic diagram of Embodiment 1;

[0024] Figure 6 Example 1 Figure 5 Enlarged structural diagram at point C;

[0025] Figure 7 This is a side view cross-sectional three-dimensional structural schematic diagram of Embodiment 1;

[0026] Figure 8 Example 1 Figure 7 Enlarged structural diagram at point D.

[0027] In the diagram: 1. Electrolytic capacitor body; 21. Inner protective layer; 22. First flame-retardant layer; 23. Second flame-retardant layer; 24. Heat insulation layer; 25. Buffer layer; 26. Top protective layer; 27. Top cover plate; 28. Moving slot; 29. ​​Spring; 32. Moving block; 33. First locking block; 34. First locking slot; 35. Slot; 36. Insert block; 37. Second locking block; 38. Second locking slot; 39. Third locking block; 41. Third locking slot; 42. Silicone grease pad; 43. Heat dissipation fins; 44. Connecting rod; 45. Screw sleeve; 46. Anti-slip sleeve; 47. Pad block. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] Please see Figure 1-8 As shown, an aluminum shell cover for an electrolytic capacitor includes an electrolytic capacitor body 1; a protective heat dissipation mechanism is provided on the outer side of the electrolytic capacitor body 1.

[0031] The protective heat dissipation mechanism includes an inner protective layer 21, which is sleeved on the outside of the electrolytic capacitor body 1. A first flame-retardant layer 22 is fixedly connected to the outside of the inner protective layer 21. A second flame-retardant layer 23 is fixedly connected to the outside of the first flame-retardant layer 22. A heat insulation layer 24 is fixedly connected to the outside of the second flame-retardant layer 23. A buffer layer 25 is fixedly connected to the outside of the heat insulation layer 24. A heat dissipation component is provided at the top of the electrolytic capacitor body 1. A connecting component is provided between the heat dissipation component and the second flame-retardant layer 23. A positioning component is provided between the heat dissipation component and the heat insulation layer 24.

[0032] Furthermore, the inner protective layer 21 is made of polytetrafluoroethylene, the first flame retardant layer 22 is made of glass fiber, the second flame retardant layer 23 is made of alumina fiber, the heat insulation layer 24 is made of aluminum alloy, and the buffer layer 25 is made of EVA.

[0033] During operation, existing aluminum casing covers for electrolytic capacitors can only protect against minor scratches and impacts to the outside of the capacitor. Heavier impacts can easily damage the capacitor. The inner protective layer 21 and top protective layer 26, made of polytetrafluoroethylene (PTFE), provide insulation. PTFE also has good high-temperature resistance, allowing it to withstand the heat generated by the capacitor body 1 during operation without burning or melting. The first flame-retardant layer 22 made of glass fiber and the second flame-retardant layer 23 made of alumina fiber further enhance the overall protective and heat dissipation mechanism. The flame-retardant properties of the material are excellent. Both glass and alumina materials can withstand high temperatures without softening or burning. Fiberglass is a non-combustible material that can effectively block the flame. The use of aluminum alloy buffer layer 25 and top cover plate 27 enhances the overall impact resistance of the protective heat dissipation mechanism. The use of EVA material buffer layer 25 further enhances the overall impact resistance of the protective heat dissipation mechanism. EVA material has effective impact resistance and can effectively buffer the impact, thereby protecting the electrolytic capacitor body 1 inside the protective heat dissipation mechanism.

[0034] Furthermore, the heat dissipation assembly includes a top protective layer 26, which is tightly attached to the top of the electrolytic capacitor body 1, and a top cover plate 27 is fixedly connected to the top of the top protective layer 26. A heat dissipation module is provided on the top of the top cover plate 27.

[0035] Furthermore, the connecting component includes a movable groove 28, which is opened on both sides of the bottom end of the top cover plate 27, and a spring 29 is provided inside the movable groove 28. A movable block 32 is slidably connected inside the movable groove 28, and a first locking block 33 is fixedly connected to the bottom end of the movable block 32. The first locking block 33 is inserted into the inside of a first locking groove 34, which is opened on both sides of the top end of the second flame retardant layer 23.

[0036] During operation, when connecting the top cover plate 27 and the top protective layer 26 to the second flame-retardant layer 23 and the heat insulation layer 24, first align the first locking block 33 with the first locking slot 34, then press the top cover plate 27 downwards to insert the first locking block 33 into the first locking slot 34. When the first locking block 33 is inserted into the first locking slot 34, the inner wall of the first locking slot 34 squeezes the first locking block 33, causing the first locking block 33 to drive the moving block 32 to move inside the moving groove 28. The spring 29 is compressed, causing it to deform elastically. When the first locking block 33 is fully inserted into the first locking groove 34, the squeezing force of the inner wall of the first locking groove 34 on the first locking block 33 disappears. At this time, the moving block 32 returns to its original position under the action of the restoring force of the spring 29 and drives the first locking block 33 to return to its original position as well, so that the first locking block 33 and the first locking groove 34 are engaged, which achieves the effect of connecting the top cover plate 27 and the top protective layer 26 with the second flame retardant layer 23 and the heat insulation layer 24.

[0037] Furthermore, the side of the spring 29 closest to the moving block 32 is fixedly connected to the moving block 32, and the side of the spring 29 furthest from the moving block 32 is fixedly connected to the inner wall of the moving groove 28.

[0038] During operation, the restoring force of the spring 29 causes the moving block 32 to automatically return the first locking block 33 to its original position.

[0039] Furthermore, the positioning component includes a slot 35, which is formed on both sides of the top of the heat insulation layer 24, and an insert block 36 is sleeved inside the slot 35. The insert block 36 is fixedly connected to the bottom of the top protective layer 26. A second locking block 37 is glued to both sides of the inner wall of the slot 35 near the bottom. The second locking block 37 is made of rubber. A second locking groove 38 is formed on both sides of the insert block 36 near the bottom. The second locking groove 38 engages with the second locking block 37. A third locking groove 41 is glued to both sides of the slot 35 near the top. The third locking groove 41 is made of rubber. The third locking groove 41 is formed on both sides of the insert block 36 near the top. The third locking groove 41 engages with the third locking block 39.

[0040] During operation, when the first locking block 33 is inserted into the first locking slot 34, the insert block 36 is simultaneously inserted into the slot 35. When the insert block 36 is inserted into the slot 35, the two sides of the insert block 36 compress the third locking block 39 and the second locking block 37, causing the rubber-made second locking block 37 and the third locking block 39 to undergo elastic deformation. When the insert block 36 is fully inserted into the second locking block 37, the second locking block 37 and the third locking block 39 return to their original positions under their own restoring force and engage with the second locking slot 38 and the third locking slot 41 respectively, which has the effect of limiting the insertion block 36 and enhancing the stability of the connection between O6 and the top cover plate 27 and the second flame-retardant layer 23 and the heat insulation layer 24.

[0041] Furthermore, the heat dissipation module includes a thermal pad 42, which is glued to the center of the top of the top cover plate 27, and the top of the thermal pad 42 is fixedly connected to the bottom of the heat dissipation fin 43. Connecting rods 44 are fixedly connected to both sides of the top of the top of the top cover plate 27, and the top of the connecting rods 44 penetrates the heat dissipation fin 43 and extends to the outside of the heat dissipation fin 43. A threaded sleeve 45 is threaded to the outside of the connecting rods 44, and a pad 47 is glued to the bottom of the threaded sleeve 45, and the pad 47 abuts against the heat dissipation fin 43.

[0042] During operation, existing aluminum shell covers for electrolytic capacitors can only protect the outer surface of the capacitor from minor scratches and impacts. When the internal heat generated by the capacitor under high load is high, it can easily cause the electrolytic capacitor to spontaneously combust or explode. When the electrolytic capacitor body 1 is working, the heat generated is conducted through the top protective layer 26 to the top cover 27, and then through the top cover 27 and the silicone pad 42 to the heat dissipation fins 43. The heat dissipation fins 43 exchange heat with the air to cool the electrolytic capacitor body 1. The heat generated during operation is discharged into the interior of the protective heat dissipation mechanism, preventing heat from accumulating inside the mechanism. When connecting the heat dissipation fins 43 and the top cover plate 27, first align the holes on the heat dissipation fins 43 with the connecting rods 44 fixedly connected to the top of the top cover plate 27. Then, put both sets of threaded sleeves 45 on the outside of the connecting rods 44 and tighten them so that the bottom of the pad 47 fits tightly with the top of the heat dissipation fins 43, thus fixing the heat dissipation fins 43 and connecting the top of the top cover plate 27.

[0043] Furthermore, an anti-slip sleeve 46 is glued to the outside of the screw sleeve 45. The anti-slip sleeve 46 has anti-slip texture on its outside, and both the anti-slip sleeve 46 and the pad 47 are made of rubber.

[0044] During operation, the rubber anti-slip sleeve 46, which is fitted on the outside of the screw sleeve 45, increases the friction, slowing down the rotation of the screw sleeve 45 until it slips due to insufficient friction. Anti-slip grooves are made on the outside of the anti-slip sleeve 46 to further increase the friction.

[0045] Working Principle: Existing aluminum casing covers for electrolytic capacitors mostly only protect against minor scratches and impacts to the outside of the capacitor. Heavier impacts can easily damage the capacitor. The inner protective layer 21 and top protective layer 26, made of polytetrafluoroethylene (PTFE), provide insulation. PTFE also has good high-temperature resistance, allowing it to withstand the heat generated by the capacitor body 1 during operation without burning or melting. The first flame-retardant layer 22 made of glass fiber and the second flame-retardant layer 23 made of alumina fiber further enhance the protection and heat dissipation mechanism. The flame-retardant properties of the material are excellent. Both glass and alumina materials can withstand high temperatures without softening or burning. Fiberglass is a non-combustible material that can effectively block the flame. The use of aluminum alloy buffer layer 25 and top cover plate 27 enhances the overall impact resistance of the protective heat dissipation mechanism. The use of EVA material buffer layer 25 further enhances the overall impact resistance of the protective heat dissipation mechanism. EVA material has effective impact resistance and can effectively buffer the impact, thereby protecting the electrolytic capacitor body 1 inside the protective heat dissipation mechanism.

[0046] When connecting the top cover plate 27 and the top protective layer 26 to the second flame-retardant layer 23 and the heat insulation layer 24, first align the first locking block 33 with the first locking slot 34, then press the top cover plate 27 downwards to insert the first locking block 33 into the first locking slot 34. When the first locking block 33 is inserted into the first locking slot 34, the inner wall of the first locking slot 34 squeezes the first locking block 33, causing the first locking block 33 to drive the moving block 32 to move inside the moving groove 28 and... The spring 29 is compressed, causing it to deform elastically. When the first locking block 33 is fully inserted into the first locking groove 34, the squeezing force of the inner wall of the first locking groove 34 on the first locking block 33 disappears. At this time, the moving block 32 returns to its original position under the action of the restoring force of the spring 29 and drives the first locking block 33 to return to its original position as well, so that the first locking block 33 and the first locking groove 34 are engaged, which achieves the effect of connecting the top cover plate 27 and the top protective layer 26 with the second flame retardant layer 23 and the heat insulation layer 24.

[0047] When the first locking block 33 is inserted into the first slot 34, the insert block 36 is also inserted into the slot 35 simultaneously. When the insert block 36 is inserted into the slot 35, the two sides of the insert block 36 squeeze the third locking block 39 and the second locking block 37, causing the second locking block 37 and the third locking block 39, which are made of rubber, to undergo elastic deformation. When the insert block 36 is fully inserted into the second locking block 37, the second locking block 37 and the third locking block 39 return to their original positions under their own restoring force and engage with the second slot 38 and the third slot 41 respectively, which has the effect of limiting the insertion block 36 and enhancing the stability of the connection between O6 and the top cover plate 27 and the second flame retardant layer 23 and the heat insulation layer 24.

[0048] Existing aluminum shell covers for electrolytic capacitors can only protect the outer side of the electrolytic capacitor from minor scratches and impacts. When the electrolytic capacitor generates a lot of heat due to high load operation, it is easy for the electrolytic capacitor to spontaneously combust or explode. When the electrolytic capacitor body 1 is working, the heat generated by the electrolytic capacitor body 1 is conducted through the top protective layer 26 to the top cover plate 27, and then through the top cover plate 27 and the silicone pad 42 to the heat dissipation fins 43. The heat dissipation fins 43 exchange heat with the air to dissipate the heat generated by the electrolytic capacitor body 1 during operation to the interior of the protective heat dissipation mechanism, thus preventing the heat from accumulating inside the protective heat dissipation mechanism.

[0049] When connecting the heat sink fins 43 to the top cover plate 27, first align the holes on the heat sink fins 43 with the connecting rods 44 that are fixedly connected to the top of the top cover plate 27. Then, put both sets of threaded sleeves 45 on the outside of the connecting rods 44 and tighten them so that the bottom end of the pad 47 fits tightly with the top end of the heat sink fins 43, thereby fixing the heat sink fins 43 and connecting the heat sink fins 43 to the top end of the top cover plate 27.

[0050] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An aluminum shell cover for an electrolytic capacitor, characterized in that: It includes an electrolytic capacitor body (1); a protective heat dissipation mechanism is provided on the outside of the electrolytic capacitor body (1); The protective heat dissipation mechanism includes an inner protective layer (21), which is sleeved on the outside of the electrolytic capacitor body (1). A first flame-retardant layer (22) is fixedly connected to the outside of the inner protective layer (21), a second flame-retardant layer (23) is fixedly connected to the outside of the first flame-retardant layer (22), a heat insulation layer (24) is fixedly connected to the outside of the second flame-retardant layer (23), a buffer layer (25) is fixedly connected to the outside of the heat insulation layer (24), a heat dissipation component is provided at the top of the electrolytic capacitor body (1), a connecting component is provided between the heat dissipation component and the second flame-retardant layer (23), and a positioning component is provided between the heat dissipation component and the heat insulation layer (24). The inner protective layer (21) is made of polytetrafluoroethylene, the first flame retardant layer (22) is made of glass fiber, the second flame retardant layer (23) is made of alumina fiber, the heat insulation layer (24) is made of aluminum alloy, and the buffer layer (25) is made of EVA. The heat dissipation assembly includes a top protective layer (26), which is tightly attached to the top of the electrolytic capacitor body (1), and a top cover plate (27) is fixedly connected to the top of the top protective layer (26). A heat dissipation module is provided on the top of the top cover plate (27). The heat dissipation module includes a silicone pad (42), which is glued to the center of the top of the top cover plate (27), and the top of the silicone pad (42) is fixedly connected to the bottom of the heat dissipation fins (43).

2. The aluminum shell cover plate for an electrolytic capacitor according to claim 1, characterized in that: The connecting component includes a movable groove (28), which is opened on both sides of the bottom end of the top cover plate (27), and a spring (29) is provided inside the movable groove (28). A movable block (32) is slidably connected inside the movable groove (28), and a first locking block (33) is fixedly connected to the bottom end of the movable block (32). The first locking block (33) is inserted into the inside of the first locking groove (34), which is opened on both sides of the top end of the second flame retardant layer (23).

3. The aluminum shell cover plate for an electrolytic capacitor according to claim 2, characterized in that: The side of the spring (29) closest to the moving block (32) is fixedly connected to the moving block (32), and the side of the spring (29) furthest from the moving block (32) is fixedly connected to the inner wall of the moving groove (28).

4. The aluminum shell cover plate for an electrolytic capacitor according to claim 1, characterized in that: The positioning component includes a slot (35), which is located on both sides of the top of the heat insulation layer (24). A plug (36) is fitted inside the slot (35). The plug (36) is fixedly connected to the bottom of the top protective layer (26). A second locking block (37) is glued to both sides of the inner wall of the slot (35) near the bottom. The second locking block (37) is made of rubber. A second slot (38) is opened on both sides of the plug (36) near the bottom. The second slot (38) engages with the second locking block (37). A third slot (41) is glued to both sides of the slot (35) near the top. The third slot (41) is made of rubber. A third slot (41) is opened on both sides of the plug (36) near the top. The third slot (41) engages with the third locking block (39).

5. The aluminum shell cover plate for an electrolytic capacitor according to claim 1, characterized in that: Both sides of the top of the top cover plate (27) are fixedly connected with connecting rods (44), and the top of the connecting rods (44) passes through the heat dissipation fins (43) and extends to the outside of the heat dissipation fins (43). The outer side of the connecting rods (44) is threadedly connected with a threaded sleeve (45), and a pad (47) is glued to the bottom of the threaded sleeve (45), and the pad (47) abuts against the heat dissipation fins (43).

6. The aluminum shell cover plate for an electrolytic capacitor according to claim 5, characterized in that: The outer side of the threaded sleeve (45) is glued with an anti-slip sleeve (46), and the outer side of the anti-slip sleeve (46) is provided with anti-slip texture. Both the anti-slip sleeve (46) and the pad (47) are made of rubber.

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