Aluminum electrolytic capacitor with heat dissipation protection structure

Abstract

The present application discloses an aluminum electrolytic capacitor with a heat dissipation protection structure, which relates to the technical field of capacitors and includes a patch, wherein a pin is fixedly welded on the outer surface of the patch, and an end of the pin away from the patch is fixedly connected to an electrolytic capacitor body, and two pins are arranged on the electrolytic capacitor body. A heat dissipation component is arranged on the outer surface of the electrolytic capacitor body. The present invention protects the electrolytic capacitor through the protection component to prevent the electrolyte from splashing around when the electrolytic capacitor explodes, avoids damage to other components on the circuit board, reduces maintenance costs, and can give a prompt when the electrolytic capacitor collides, so that the staff can quickly find the faulty electrolytic capacitor. The heat dissipation component can protect the electrolytic capacitor and dissipate heat at the same time, so that the electrolytic capacitor has good ventilation, avoids continuous temperature rise of the electrolytic capacitor, and increases the service life of the electrolytic capacitor.

Description

Technical Field

[0001] The present application relates to the technical field of capacitors, and in particular to an aluminum electrolytic capacitor with a heat dissipation protection structure. Background Art

[0002] Aluminum electrolytic capacitors are made of an aluminum cylinder as the negative electrode, filled with liquid electrolyte, and a curved aluminum strip inserted as the positive electrode. Among them, the cathode material of the SMD aluminum electrolytic capacitor is electrolyte, including non-polar and polar types. This is also the most widely used capacitor we see. It also needs to be treated with DC voltage to form an oxide film on the positive electrode as a medium. It is characterized by large capacity, but large leakage, poor stability, positive and negative polarity, and is suitable for power supply filtering or low-frequency circuits. When using, do not connect the positive and negative poles in reverse. In modern society, electrical equipment is used more and more widely, and a large number of capacitors are needed in the production of electrical appliances. Aluminum electrolytic capacitors are widely used due to their relatively mature technology and low price, but they generate a lot of heat under high load, resulting in a faster aging speed. It is easy to leak and explode during use, which will cause other components on the circuit board to be damaged or short-circuited, resulting in more serious consequences.

[0003] The existing technology still has the following problems:

[0004] 1. Most of the existing aluminum electrolytic capacitors do not have a protective structure. Long-term use will cause high temperature and capacitor explosion. There is no protective structure to protect it, which will cause electrolyte splashing, causing damage to other electrical components on the circuit board, increasing maintenance costs, and there is no prompt when the electrolytic capacitor expands, which affects the difficulty of electrolytic capacitor maintenance.

[0005] 2. When a small number of aluminum electrolytic capacitors with protective structures are in use, the temperature of the electrolytic capacitor rises. There is no air permeability between the electrolytic capacitor and the protective structure, which causes the temperature of the electrolytic capacitor to continue to rise and eventually causes the electrolytic capacitor to explode. Summary of the invention

[0006] The present application solves the problem in the prior art that electrolyte splashing causes damage to other electrical components on the circuit board by providing an aluminum electrolytic capacitor with a heat dissipation protection structure. The electrolytic capacitor and the protection structure are airtight, which prevents the electrolyte from splashing when the electrolytic capacitor explodes, thereby avoiding damage to other components on the circuit board. The electrolytic capacitor has good ventilation.

[0007] The present application provides an aluminum electrolytic capacitor with a heat dissipation protection structure, comprising a patch, a pin is fixedly welded on the outer surface of the patch, an end of the pin away from the patch is fixedly connected to an electrolytic capacitor body, two pins are arranged on the electrolytic capacitor body, a heat dissipation component is arranged on the outer surface of the electrolytic capacitor body, a protection component is arranged at the end of the electrolytic capacitor body away from the pin, the heat dissipation component comprises a protective shell, a circulation mechanism is fixedly installed in the inner cavity of the protective shell, a sealing ring is slidably connected to the end of the protective shell close to the pin, a ventilation mechanism is inserted in the inner cavity of the sealing ring, and the circulation mechanism is located between the protective shell and the electrolytic capacitor body, and is tightly fitted with the protective shell and the electrolytic capacitor body.

[0008] Furthermore, the circulation mechanism comprises a fastening ring, a first connecting rod is inserted into an inner cavity of the fastening ring, and a connecting hole is formed on an outer surface of the fastening ring.

[0009] Furthermore, the fastening ring is fixedly connected via a first connecting rod, the first connecting rod and the connecting holes are arranged alternately, and the fastening ring is tightly fitted to the outer surface of the electrolytic capacitor body.

[0010] Furthermore, the ventilation mechanism includes a fixed ring, a ventilation rod is inserted into the inner cavity of the fixed ring, a pressure plate is fixedly installed at one end of the ventilation rod close to the electrolytic capacitor body, a spring is sleeved on the outer surface of the pressure plate, and ventilation grooves are opened on both sides of the ventilation rod.

[0011] Furthermore, the pressure plate and the electrolytic capacitor body fit tightly, the spring is located between the fixing ring and the pressure plate, the ventilation rod and the fixing ring are slidably connected, the fixing ring is fixedly installed on the inner wall of the protective shell, the ventilation rod passes through the fixing ring and the sealing ring, the end of the ventilation rod away from the pressure plate is flush with the outer surface of the sealing ring, and the ventilation groove on the ventilation rod is not exposed, and the sealing ring is fixed to the inner wall of the protective shell.

[0012] Furthermore, the protective component includes a connecting seat, a fixing seat is fixedly installed on one end of the connecting seat away from the electrolytic capacitor body, a second connecting rod is inserted into the inner cavity of the fixing seat, a connecting strip is sleeved on the outer surface of the second connecting rod, a slot is opened at one end of the connecting strip away from the fixing seat, and the second connecting rod is engaged in the inner cavity of the slot.

[0013] Furthermore, a sleeve is fixedly connected to the outer surface of the connecting seat away from the electrolytic capacitor body, expansion joints are provided at both ends of the sleeve, one end of the sleeve away from the connecting seat is fixedly connected to a top seat, a fixed seat is fixedly installed on the side of the top seat close to the connecting seat, a button is provided on the outer surface of the top seat, a fault light is fixedly installed on the side of the top seat away from the button, and a fixed block is fixedly installed on the end of the sleeve close to the button.

[0014] Furthermore, the button is electrically connected to the fault light, and pressing the button controls the fault light to issue a warning. The button and the fixing block are located on the same straight line, and the connecting seat is fixed to the inner wall of the protective shell and is in close contact with the outer surface of the electrolytic capacitor body.

[0015] The technical solution provided by this application has at least the following technical effects or advantages:

[0016] 1. The use of protective components effectively solves the problem that most of the existing aluminum electrolytic capacitors have no protective structure, which causes the capacitor to burst due to high temperature during long-term use. There is no protective structure to protect it, which leads to electrolyte splashing, causing damage to other electrical components on the circuit board, increasing the maintenance cost, and there is no prompt when the electrolytic capacitor expands, which affects the difficulty of maintaining the electrolytic capacitor. The present invention protects the electrolytic capacitor through a protective component to prevent the electrolyte from splashing when the electrolytic capacitor explodes, avoids damage to other components on the circuit board, reduces maintenance costs, and can give a prompt when the electrolytic capacitor collides, so that the staff can quickly find the faulty electrolytic capacitor.

[0017] 2. The use of a heat dissipation component effectively solves the problem that the temperature of a small number of aluminum electrolytic capacitors with protective structures rises during use, and the electrolytic capacitor and the protective structure are not airtight, causing the temperature of the electrolytic capacitor to continue to rise and eventually cause the electrolytic capacitor to explode. The present invention can protect the electrolytic capacitor while dissipating heat through the heat dissipation component, so that the electrolytic capacitor has good ventilation, avoids continuous temperature rise of the electrolytic capacitor, and increases the service life of the electrolytic capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application;

[0019] Figure 2 This is a schematic cross-sectional view of the heat dissipation assembly structure in Embodiment 1 of the present application;

[0020] Figure 3 This is a schematic diagram of the sealing ring structure in Example 1 of the present application;

[0021] Figure 4 This is a schematic diagram of the fixing ring structure in Example 1 of the present application;

[0022] Figure 5 For Example 1 of this application Figure 4 A schematic diagram of the structure enlargement at the center A;

[0023] Figure 6 This is a schematic diagram of the circulation mechanism structure in Example 1 of the present application;

[0024] Figure 7 This is a schematic diagram of the structure of the protection component in the second embodiment of the present application;

[0025] Figure 8 This is a schematic diagram of the card slot structure in Example 2 of the present application.

[0026] In the figure: 1. SMD; 2. Pin; 3. Electrolytic capacitor body; 4. Heat dissipation component; 41. Protective shell; 42. Circulation mechanism; 421. Fastening ring; 422. First connecting rod; 423. Connecting hole; 43. Sealing ring; 44. Ventilation mechanism; 441. Fixing ring; 442. Ventilation rod; 443. Pressure plate; 444. Spring; 445. Ventilation slot; 5. Protective component; 51. Connecting seat; 52. Fixing seat; 53. Second connecting rod; 54. Connecting strip; 55. Slot; 56. Sleeve; 57. Expansion joint; 58. Top seat; 59. Button; 510. Fault light; 511. Fixing block. DETAILED DESCRIPTION

[0027] In the absence of a protective structure, which causes electrolyte splashing and damage to other electrical components on the circuit board, the present invention protects the electrolytic capacitor through a protective component to prevent the electrolyte from splashing when the electrolytic capacitor explodes, avoids damage to other components on the circuit board, and reduces maintenance costs; in the absence of air permeability between the electrolytic capacitor and the protective structure, which causes the temperature of the electrolytic capacitor to continue to rise and eventually cause the electrolytic capacitor to explode, the heat dissipation component of the present invention can protect the electrolytic capacitor and dissipate heat at the same time, so that the electrolytic capacitor has good ventilation and increases the service life of the electrolytic capacitor.

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Embodiment 1

[0030] See also Figure 1 and Figure 2 As shown, an aluminum electrolytic capacitor with a heat dissipation protection structure includes a patch 1, a pin 2 is fixedly welded on the outer surface of the patch 1, an end of the pin 2 away from the patch 1 is fixedly connected to an electrolytic capacitor body 3, two pins 2 are arranged on the electrolytic capacitor body 3, a heat dissipation component 4 is arranged on the outer surface of the electrolytic capacitor body 3, and a protection component 5 is arranged on the end of the electrolytic capacitor body 3 away from the pin 2. The pin 2 is welded to the patch 1 for use, the heat dissipation component 4 is used to ventilate the electrolytic capacitor body 3, and the protection component 5 cooperates with the heat dissipation component 4 to protect the electrolytic capacitor body 3.

[0031] See also Figure 3As shown, the heat dissipation component 4 includes a protective shell 41, the inner cavity of the protective shell 41 is fixedly installed with a circulation mechanism 42, the end of the protective shell 41 close to the pin 2 is slidably connected with a sealing ring 43, the inner cavity of the sealing ring 43 is inserted with a ventilation mechanism 44, the circulation mechanism 42 is located between the protective shell 41 and the electrolytic capacitor body 3, and is tightly fitted with the protective shell 41 and the electrolytic capacitor body 3, and the position of the sealing ring 43 can be adjusted for ventilation. When the temperature of the electrolytic capacitor body 3 is high and it expands itself, the ventilation mechanism 44 is squeezed and exposed from the sealing ring 43 to increase the air flow rate. At this time, the circulation mechanism 42 is used to protect the electrolytic capacitor body 3 all around, and can also ventilate the entire electrolytic capacitor body 3 all around, so as to facilitate the circulation of air and cool down the outer surface of the electrolytic capacitor body 3.

[0032] See also Figure 4 , Figure 5 and Figure 6As shown, the circulation mechanism 42 includes a fastening ring 421, the inner cavity of the fastening ring 421 is inserted with a first connecting rod 422, the outer surface of the fastening ring 421 is provided with a connecting hole 423, the fastening ring 421 is fixedly connected through the first connecting rod 422, the first connecting rod 422 and the connecting hole 423 are arranged alternately, the fastening ring 421 is tightly fitted with the outer surface of the electrolytic capacitor body 3, and the ventilation mechanism 44 includes a fixing ring 441, the inner cavity of the fixing ring 441 is inserted with a ventilation rod 442, and the ventilation rod 442 is close to the electrolytic capacitor body 3. A pressure plate 443 is fixedly installed at one end of the capacitor body 3, a spring 444 is sleeved on the outer surface of the pressure plate 443, ventilation grooves 445 are opened on both sides of the ventilation rod 442, the pressure plate 443 and the electrolytic capacitor body 3 are tightly fitted, the spring 444 is located between the fixing ring 441 and the pressure plate 443, the ventilation rod 442 and the fixing ring 441 are slidably connected, the fixing ring 441 is fixedly installed on the inner wall of the protective shell 41, the ventilation rod 442 passes through the fixing ring 441 and the sealing ring 43, and the ventilation rod 442 is away from the pressure plate 443. One end of the disk 443 is flush with the outer surface of the sealing ring 43, and the ventilation groove 445 on the ventilation rod 442 is not exposed. The sealing ring 43 is fixed to the inner wall of the protective shell 41. When in use, the position of the sealing ring 43 on the ventilation rod 442 can be adjusted. When the ventilation groove 445 is not exposed to the outside, the electrolytic capacitor body 3 has good airtightness as a whole. Of course, the sealing ring 43 can be adjusted to a suitable position so that the ventilation groove 445 is exposed outside the sealing ring 43, which is convenient for ventilation of the electrolytic capacitor body 3. When the sealing ring 43 is fixed in position on the inner wall of the protective shell 41, the expansion caused by the high temperature of the electrolytic capacitor body 3 can drive the pressure plate 443 to squeeze the spring 444 to move the ventilation rod 442 in the inner cavity of the fixing ring 441, so that the ventilation groove 445 is more exposed, thereby increasing the ventilation of the outer surface of the electrolytic capacitor body 3, and the wind can circulate through the connecting hole 423 on the fastening ring 421, so that the air can flow around the electrolytic capacitor body 3 to quickly cool down the electrolytic capacitor body 3, thereby increasing the service life of the electrolytic capacitor body 3.

[0033] Embodiment 2

[0034] See also Figure 2 , Figure 7 and Figure 8As shown, the protective component 5 includes a connecting seat 51, and a fixing seat 52 is fixedly installed at one end of the connecting seat 51 away from the electrolytic capacitor body 3. A second connecting rod 53 is inserted into the inner cavity of the fixing seat 52, and a connecting strip 54 is sleeved on the outer surface of the second connecting rod 53. A card slot 55 is opened at one end of the connecting strip 54 away from the fixing seat 52, and the inner cavity of the card slot 55 is engaged with the second connecting rod 53. A sleeve 56 is fixedly connected to the outer surface of the connecting seat 51 away from the electrolytic capacitor body 3, and expansion joints 57 are arranged at both ends of the sleeve 56. The sleeve 56 is away from One end of the connecting seat 51 is fixedly connected to a top seat 58, a side of the top seat 58 close to the connecting seat 51 is fixedly installed with a fixing seat 52, a button 59 is provided on the outer surface of the top seat 58, a side of the top seat 58 away from the button 59 is fixedly installed with a fault light 510, and a fixing block 511 is fixedly installed at one end of the sleeve 56 close to the button 59, the button 59 and the fault light 510 are electrically connected, and the pressing of the button 59 controls the fault light 510 to give a warning, the button 59 and the fixing block 511 are located in the same straight line, and the connecting seat 51 is fixed on the protective The inner wall of the shell 41 is in close contact with the outer surface of the electrolytic capacitor body 3. When the electrolytic capacitor body 3 explodes, under the fastening of the circulation mechanism 42 and the flexible blocking of the ventilation mechanism 44, the exploded electrolyte enters the sleeve 56 from the connecting seat 51, so that the expansion joint 57 moves toward the top seat 58. At this time, the movement of the sleeve 56 drives the fixed block 511 to move, and the movement of the fixed block 511 causes the fixed block 511 to squeeze the button 59. At this time, the button 59 controls the fault light 510 to warn, which is convenient for maintenance personnel to quickly find it. The second connecting rod 53 and the card slot 55 are connected by the card engagement to facilitate the rapid disassembly of the top seat 58 and observe the damage of the electrolytic capacitor body 3. There is a certain flexible force between the expansion joints 57, which cooperates with the protection of the circulation mechanism 42 to cause the splashing electrolyte to cause the deformation of the sleeve 56, further preventing the electrolyte from splashing out, and reducing the radial deformation of the electrolytic capacitor body 3. It is avoided that the electrolytic capacitor body 3 expands and squeezes the nearby gas electronic components, further ensuring the safety of other electrical components on the patch 1 and reducing the maintenance cost.

[0035] To sum up, when the temperature of the electrolytic capacitor body 3 is high and it expands itself, the ventilation mechanism 44 is squeezed and exposed from the sealing ring 43 to increase the air flow rate, which is enough to ventilate the entire surrounding of the electrolytic capacitor body 3 to facilitate air circulation and cool down the outer surface of the electrolytic capacitor body 3. The position of the sealing ring 43 on the ventilation rod 442 can be adjusted. When the ventilation groove 445 is not exposed to the outside, the electrolytic capacitor body 3 has good airtightness as a whole. Of course, the sealing ring 43 can be adjusted to a suitable position so that the ventilation groove 445 is exposed on the outside of the sealing ring 43 to facilitate ventilation of the electrolytic capacitor body 3. The expansion caused by the high temperature of the electrolytic capacitor body 3 can drive the pressure plate The 443 extrusion spring 444 causes the ventilation rod 442 to move in the inner cavity of the fixed ring 441, so that the ventilation groove 445 is more exposed, thereby increasing the ventilation of the outer surface of the electrolytic capacitor body 3 and increasing the service life of the electrolytic capacitor body 3. When the electrolytic capacitor body 3 explodes, under the fastening of the circulation mechanism 42 and the flexible blocking of the ventilation mechanism 44, the exploded electrolyte enters the sleeve 56 from the connecting seat 51, causing the expansion joint 57 to move toward the top seat 58 to prevent the electrolyte from exploding and causing damage to surrounding components. At this time, the movement of the sleeve 56 causes the fixed block 511 to squeeze the button 59, and the button 59 controls the fault light 510 to warn, which is convenient for maintenance personnel to quickly find it.

[0036] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0037] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. An aluminum electrolytic capacitor with a heat dissipation protection structure, comprising a patch (1), characterized in that: A pin (2) is fixedly welded on the outer surface of the patch (1); an end of the pin (2) away from the patch (1) is fixedly connected to an electrolytic capacitor body (3); two pins (2) are provided on each of the electrolytic capacitor bodies (3); a heat dissipation component (4) is provided on the outer surface of the electrolytic capacitor body (3); and a protective component (5) is provided on the end of the electrolytic capacitor body (3) away from the pins (2); The heat dissipation component (4) comprises a protective shell (41), a circulation mechanism (42) is fixedly installed in the inner cavity of the protective shell (41), a sealing ring (43) is slidably connected to one end of the protective shell (41) close to the pin (2), a ventilation mechanism (44) is inserted into the inner cavity of the sealing ring (43), and the circulation mechanism (42) is located between the protective shell (41) and the electrolytic capacitor body (3), and is tightly fitted to the protective shell (41) and the electrolytic capacitor body (3); The circulation mechanism (42) comprises a fastening ring (421), a first connecting rod (422) is inserted into the inner cavity of the fastening ring (421), and a communication hole (423) is formed on the outer surface of the fastening ring (421); The fastening ring (421) is fixedly connected via a first connecting rod (422), the first connecting rod (422) and the connecting holes (423) are arranged alternately, and the fastening ring (421) is tightly fitted to the outer surface of the electrolytic capacitor body (3); The ventilation mechanism (44) comprises a fixing ring (441), a ventilation rod (442) is inserted into the inner cavity of the fixing ring (441), a pressure plate (443) is fixedly mounted on one end of the ventilation rod (442) close to the electrolytic capacitor body (3), a spring (444) is sleeved on the outer surface of the pressure plate (443), and ventilation grooves (445) are provided on both sides of the ventilation rod (442); The pressure plate (443) and the electrolytic capacitor body (3) are tightly fitted, the spring (444) is located between the fixing ring (441) and the pressure plate (443), the ventilation rod (442) and the fixing ring (441) are slidably connected, the fixing ring (441) is fixedly mounted on the inner wall of the protective shell (41), the ventilation rod (442) passes through the fixing ring (441) and the sealing ring (43), one end of the ventilation rod (442) away from the pressure plate (443) is flush with the outer surface of the sealing ring (43), and the ventilation groove (445) on the ventilation rod (442) is not exposed, and the sealing ring (43) is fixed to the inner wall of the protective shell (41); The protection component (5) comprises a connecting seat (51), a fixing seat (52) is fixedly mounted on one end of the connecting seat (51) away from the electrolytic capacitor body (3), a second connecting rod (53) is inserted into the inner cavity of the fixing seat (52), a connecting strip (54) is sleeved on the outer surface of the second connecting rod (53), a slot (55) is formed on one end of the connecting strip (54) away from the fixing seat (52), and the second connecting rod (53) is engaged in the inner cavity of the slot (55); A sleeve (56) is fixedly connected to the outer surface of the connecting seat (51) away from the electrolytic capacitor body (3), expansion joints (57) are provided at both ends of the sleeve (56), one end of the sleeve (56) away from the connecting seat (51) is fixedly connected to a top seat (58), a fixing seat (52) is fixedly installed on a side of the top seat (58) close to the connecting seat (51), a button (59) is provided on the outer surface of the top seat (58), a fault light (510) is fixedly installed on a side of the top seat (58) away from the button (59), and a fixing block (511) is fixedly installed on one end of the sleeve (56) close to the button (59).

2. The aluminum electrolytic capacitor with a heat dissipation protection structure according to claim 1, characterized in that: The button (59) is electrically connected to the fault light (510), and pressing the button (59) controls the fault light (510) to emit a warning. The button (59) and the fixing block (511) are located on the same straight line. The connecting seat (51) is fixed to the inner wall of the protective shell (41) and is in close contact with the outer surface of the electrolytic capacitor body (3).

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