Flame retardant aluminum electrolytic capacitors

Abstract

The present application discloses a flame-retardant aluminum electrolytic capacitor, and relates to the technical field of aluminum electrolytic capacitors. The present application includes: a sealed shell, in which a first circular plate is fixedly connected, and a first cylinder is coaxially connected to the first circular plate. The present application adopts the design of a sealed shell. When the first cylinder and the first sleeve are separated under the action of vaporized electrolyte, the electrolyte vapor can enter the sealed shell, drive the driving member to move, and drive the cut-off mechanism and the trigger member to move. The first pin is cut off by the cut-off mechanism, and the energy supply of the capacitor is disconnected, so that the capacitor is not easy to continue to explode or burn. Subsequently, multiple air bags are punctured by the trigger member, so that nitrogen and electrolyte vapor are quickly mixed, the oxygen concentration is reduced, and the capacitor core is prevented from burning. Compared with the prior art, it has the advantage of good flame retardant performance and can effectively reduce property losses.

Description

Technical Field

[0001] The present application relates to the technical field of aluminum electrolytic capacitors, and in particular to flame-retardant aluminum electrolytic capacitors. 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. They also need to be treated with DC voltage to form an oxide film on the positive electrode as a medium. Its characteristics are large capacity, but large leakage, poor stability, positive and negative polarity, and are suitable for power supply filtering or low-frequency circuits.

[0003] When using, aluminum electrolytic capacitors are prone to failure due to external factors, that is, the temperature of the capacitor is too high, the electrolyte inside rapidly vaporizes and expands, breaks through the outer shell and explodes, and burns violently after contacting the outside air. After searching the utility model with patent publication number CN221281928U, an explosion-proof and flame-retardant aluminum electrolytic capacitor is disclosed. By providing a first protective outer shell and a second protective outer shell on the outside of the aluminum inner shell, the aluminum inner shell can be protected from being squeezed, and when the electrolyte layer inside the aluminum inner shell explodes or burns due to heat, the impact of the explosion transmitted to the protective arc plate can be buffered by the buffer rubber, and when the protective arc plate is squeezed, the fire extinguishing agent powder inside the airbag bag will rush out from the extrusion fracture and spray onto the aluminum inner shell, and cooperate with the flame retardant layer to prevent the aluminum inner shell from spontaneous combustion, and in the first protective outer shell When the pressure inside the first and second protective shells is relatively high, the first and second protective shells can be separated to release the pressure. However, in some cases, after the aluminum electrolytic capacitor is blown up by the vaporized electrolyte, the aluminum electrolytic capacitor is not completely damaged. At this time, the circuit is still in an on state, and the fire extinguishing agent powder inside the aluminum inner shell will be discharged from the aluminum inner shell together with the vaporized electrolyte, resulting in the fire extinguishing agent powder being unable to play a flame retardant effect. The exploded aluminum electrolytic capacitor is prone to spontaneous combustion when current passes through. In order to reasonably improve this problem, the present application proposes a flame retardant aluminum electrolytic capacitor. Summary of the invention

[0004] The purpose of the present application is to solve the technical problem that in some cases, after an aluminum electrolytic capacitor is exploded by vaporized electrolyte, the aluminum electrolytic capacitor is not completely damaged. At this time, the circuit is still in a conducting state. The fire extinguishing agent powder that has a flame retardant effect in the prior art is easily discharged from the aluminum inner shell together with the vaporized electrolyte, resulting in the fire extinguishing agent powder being unable to play a flame retardant effect. The exploded aluminum electrolytic capacitor is prone to spontaneous combustion when current passes through. The present application provides a flame retardant aluminum electrolytic capacitor.

[0005] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0006] Flame retardant aluminum electrolytic capacitors, including:

[0007] A sealed shell, in which a first circular plate is fixedly connected, a first cylinder is coaxially connected to the first circular plate, and a capacitor core is arranged in the first cylinder;

[0008] The first sleeve has a plurality of strip blocks distributed in an annular manner on the inner wall, and the plurality of strip blocks are all slidably matched with the outer side of the first cylinder. The first circular plate has a plurality of slots distributed in an annular manner on the circumference thereof. The first sleeve is provided with a plurality of flexible sheets, and the flexible sheets are connected with the slots. The first cylinder mouth is provided with an annular pad, and the annular pad is overlapped with the first sleeve.

[0009] The first pin and the second pin are both installed outside the sealed shell, penetrate the first circular plate, and are connected to the capacitor core. The sealed shell is provided with a cut-off mechanism, and the first pin can be cut off by the cut-off mechanism.

[0010] A driving member is disposed in the sealing shell, and when the first cylinder is separated from the first sleeve, the driving member can drive the cut-off mechanism to operate;

[0011] Multiple airbags are distributed at intervals on the inner wall of the sealed shell. The airbags are all filled with nitrogen. A trigger is provided on the top of the airbag and cooperates with the driving member. The trigger can puncture the multiple airbags.

[0012] Further, the cut-off mechanism includes a fan-shaped groove constructed inside the sealing shell, a cylindrical groove is constructed at the end of the fan-shaped groove, a movable plate is provided in the fan-shaped groove and is hinged to the cylindrical groove, the first pin includes a first conductive column and a second conductive column, and the opposite ends of the two respectively pass through the opposite sides of the cylindrical groove, a conductive block is installed on the movable plate, and the two ends of the conductive block are respectively in contact with and overlap the first conductive column and the second conductive column, and the movable plate is linked to the driving member through a connecting member.

[0013] Furthermore, the first conductive pillar and the second conductive pillar are both configured with first contact surfaces at opposite ends, and the conductive blocks are configured with second contact surfaces at opposite ends, and the two second contact surfaces contact the two first contact surfaces respectively.

[0014] Furthermore, the driving member includes a first compression spring, and the sealing shell includes a second cylinder, a second sleeve is movably engaged with the outer side of the second cylinder, and the opposite ends of the second cylinder and the second sleeve are cooperated with a first annular block and a second annular block, the first compression spring is sleeved on the outer side of the second cylinder, and the two ends of the first compression spring respectively contact with the opposite sides of the first annular block and the second annular block, the first annular block is provided with a guiding mechanism, and the movement of the second sleeve can be guided by the guiding mechanism, and a sealing rubber ring is installed on the inner side of the second annular block, and it is movably overlapped with the outer side of the second cylinder.

[0015] Furthermore, the guiding mechanism includes sliding grooves distributed in an annular shape on the circumference of the first annular block, and sliding blocks are slidably fitted in the sliding grooves. The sliding blocks are connected to the sliding grooves by a second compression spring. A spiral groove is provided on the inner wall of the second sleeve, and the sliding blocks are movably in contact with the spiral groove. A strip groove is provided on the inner wall of the second sleeve and is connected to the end of the spiral groove.

[0016] Furthermore, the end of the sliding block is constructed with a hemispherical surface, and the cross-sections of the spiral groove and the strip groove are both arc-shaped.

[0017] Furthermore, the connecting member includes a guide column constructed on the movable plate, the sealing shell is provided with an arc-shaped waist hole connected to the fan-shaped groove, the guide column is slidingly tangent to the arc-shaped waist hole, the inner wall of the second sleeve is constructed with a slot, and the guide column is slidably inserted into the slot.

[0018] Furthermore, a fixing frame is distributed in an annular manner on the inner wall of the second cylinder, and a plurality of air bags are respectively arranged in the fixing frame, and an opening is configured at an end of the fixing frame.

[0019] Furthermore, the trigger member includes a second circular plate, and is rotatably installed on the bottom of the second sleeve. A plurality of tube bodies are distributed in an annular manner on the second circular plate. The tube bodies are all provided with rod bodies, and the tube bodies are all connected with magnetic blocks. The rod bodies are magnetically connected to the magnetic blocks, and the ends of the rod bodies are all constructed with a puncture portion. A fixed block is constructed on the inner wall of the second cylinder, and the tube body slides through the fixed block. An annular plate is constructed on the circumference of the rod body, and a third compression spring is connected to the fixed block, and the end of the third compression spring is in conflict with the annular plate.

[0020] Furthermore, the rod body is movably inserted into the tube body.

[0021] The beneficial effects of this application are as follows:

[0022] The present application adopts a sealed shell design. When the first cylinder and the first sleeve are separated under the action of vaporized electrolyte, the electrolyte vapor can enter the sealed shell and drive the driving member to operate, and drive the cutoff mechanism and the trigger member to operate. The first pin is cut off by the cutoff mechanism, and the energy supply of the capacitor is disconnected, making it difficult for the capacitor to continue to explode or burn. Subsequently, multiple air bags are punctured by the trigger member, so that nitrogen and electrolyte vapor are quickly mixed, the oxygen concentration is reduced, and the capacitor core is prevented from burning. Compared with the prior art, it has the advantage of good flame retardant performance and can effectively reduce property losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural diagram of this application;

[0024] Figure 2 This application Figure 1 A partial structural cross-sectional view;

[0025] Figure 3 This application Figure 2 A magnified image of point A;

[0026] Figure 4 It is a partial structural cross-sectional view of the truncation mechanism of the present application;

[0027] Figure 5 This application Figure 4 The enlarged view of point B;

[0028] Figure 6 This is a schematic diagram of the structural disassembly of the first cylinder of the present application;

[0029] Figure 7 It is a schematic diagram of the structural disassembly of the driving component of this application;

[0030] Figure 8 This application Figure 7 Enlarged view of point C;

[0031] Fig. 9 It is a structural side view of the trigger member of the present application;

[0032] Figure numerals: 1, sealing shell; 101, second cylinder; 102, second sleeve; 103, first annular block; 104, second annular block; 105, sealing rubber ring; 2, first circular plate; 3, first cylinder; 4, capacitor core; 5, first sleeve; 6, strip block; 7, slot; 8, flexible sheet; 9, annular pad; 10, first pin; 1001, first conductive column; 1002, second conductive column; 11, second pin; 12, cut-off mechanism; 1201, fan-shaped groove; 1202, columnar groove; 1203, movable plate; 1204, conductive block; 1205, connector; 12051, guide column; 12052, Arc waist hole; 12053, slot; 13, driving member; 1301, first compression spring; 1302, guiding mechanism; 13021, sliding groove; 13022, sliding block; 13023, spiral groove; 13024, strip groove; 13025, second compression spring; 14, airbag; 15, trigger member; 1501, second circular plate; 1502, tube body; 1503, rod body; 1504, magnetic block; 1505, acupuncture part; 1506, fixing block; 1507, annular plate; 1508, third compression spring; 16, first contact surface; 17, second contact surface; 18, hemispherical surface; 19, fixing frame; 20, opening. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0034] like Figure 1-Figure 9As shown, a flame-retardant aluminum electrolytic capacitor proposed in one embodiment of the present application includes:

[0035] A sealed shell 1, wherein the space inside the sealed shell 1 is separated from the external space, a first circular plate 2 is fixedly connected therein, a first cylinder 3 is coaxially connected to the first circular plate 2, the opening of the first cylinder 3 is far away from the first circular plate 2, a capacitor core 4 is arranged inside the first cylinder 3, the capacitor core 4 is the inner core of the existing capacitor, the inner core comprises front and back aluminum foils, and the front and back aluminum foils are separated by electrolytic paper soaked in electrolyte;

[0036] The first sleeve 5 is made of aluminum alloy, and a plurality of strip blocks 6 are distributed in an annular manner on the inner wall. The strip blocks 6 and the first sleeve 5 extend in the same direction, and the plurality of strip blocks 6 are all slidably matched with the outer side of the first cylinder 3. On the one hand, the strip blocks 6 can increase the structural strength of the first sleeve 5, making it less likely to be deformed and damaged, and on the other hand, they can limit the deformation of the first cylinder 3. A card groove 7 is distributed in an annular manner on the circumference of the first circular plate 2, and a plurality of flexible sheets 8 are configured on the first sleeve 5. The flexible sheets 8 are connected to the card groove 7. An annular pad 9 is laid on the mouth of the first cylinder 3. The annular pad 9 is made of natural rubber, which can improve the sealing performance of the first sleeve 5 and the first cylinder 3. Due to the existing electrolyte, It is generally prepared by special sulfuric acid and distilled water in a certain proportion. Such a design makes the annular gasket 9 have good corrosion resistance, is not easy to be damaged, and is in contact with the first sleeve 5. When the first sleeve 5 is completely sleeved on the first cylinder 3 and contacts the annular gasket 9, the flexible sheet 8 can be forced to deform and be inserted into the card slot 7. Since the flexible sheet 8 is thin and easy to deform, the connection between the first cylinder 3 and the first sleeve 5 is relatively weak. When the electrolyte vaporizes rapidly and the pressure in the first cylinder 3 is too high, the flexible sheet 8 can be deformed and separated from the card slot 7 under the action of pressure. At this time, the first sleeve 5 can be separated from the annular gasket 9, and the electrolyte vapor can be discharged into the sealed shell 1 through the gaps between the multiple strip blocks 6;

[0037] The first pin 10 and the second pin 11 are both installed on the outside of the sealed shell 1, and penetrate the first circular plate 2, and are connected to the capacitor core 4. The first pin 10 and the second pin 11 are respectively connected to the positive and negative aluminum foils in the capacitor core 4. The sealed shell 1 is provided with a cut-off mechanism 12, and the first pin 10 can be cut off by the cut-off mechanism 12. After the first pin 10 is cut off, the connection between the capacitor and the circuit board can be disconnected, so as to cut off the current, so that the capacitor is not easy to continue to explode or burn;

[0038] The driving member 13 is arranged in the sealed shell 1. When the first cylinder 3 is separated from the first sleeve 5, the electrolyte vapor entering the sealed shell 1 can drive the driving member 13 to operate, and the driving member 13 can drive the cut-off mechanism 12 to operate, thereby cutting off the energy supply to the capacitor, making it difficult to continue to explode or burn, thereby effectively reducing losses;

[0039] Multiple airbags 14, which are made of vulcanized rubber, are similar to balloons and are spaced apart on the inner wall of the sealed shell 1. The airbags 14 are filled with nitrogen. After the airbags 14 are expanded by nitrogen, the surface of the airbags 14 is relatively thin. A triggering member 15 is provided on the top of the airbag 14, and is linked with the driving member 13. The triggering member 15 can be driven by the driving member 13 to move, and the multiple airbags 14 can be punctured by the triggering member 15. Subsequently, the nitrogen can be quickly mixed with the electrolyte vapor and reduce the oxygen concentration, so that the capacitor core 4 is not easy to burn;

[0040] After the inner core of the capacitor is damaged, the electrolyte vaporizes rapidly. At this time, the pressure in the first cylinder 3 is too high. Under the action of pressure, the flexible sheet 8 can be deformed and detached from the card slot 7. At this time, the first sleeve 5 can be separated from the annular pad 9, and the electrolyte vapor can be discharged into the sealed shell 1 through the gaps between the multiple strip blocks 6. The driving member 13 is driven by the electrolyte vapor to operate, and the driving member 13 drives the cut-off mechanism 12 to cut off the first pin 10, thereby disconnecting the capacitor from the circuit board, achieving the purpose of cutting off the current, so that the capacitor is not easy to continue to explode or burn. Subsequently, the trigger member 15 is driven by the driving member 13 to operate, and the multiple air bags 14 are exploded, so that the nitrogen and the electrolyte vapor are quickly mixed and the oxygen concentration is reduced, thereby achieving the purpose of flame retardancy;

[0041] The present application adopts the design of the sealed shell 1. When the first cylinder 3 and the first sleeve 5 are separated under the action of the vaporized electrolyte, the electrolyte vapor can enter the sealed shell 1 and drive the driving member 13 to operate, and drive the cut-off mechanism 12 and the trigger member 15 to operate. The first pin 10 is cut off by the cut-off mechanism 12, and the energy supply of the capacitor is disconnected, so that the capacitor is not easy to continue to explode or burn. Subsequently, multiple air bags 14 are punctured by the trigger member 15, so that nitrogen and electrolyte vapor are quickly mixed, the oxygen concentration is reduced, and the capacitor core 4 is prevented from burning. Compared with the prior art, it has the advantage of good flame retardant performance and can effectively reduce property losses.

[0042] like Figure 2 , Figure 4 and Figure 5As shown, in some embodiments, the cut-off mechanism 12 includes a fan-shaped groove 1201 constructed inside the sealing shell 1, and a cylindrical groove 1202 is constructed at the end of the fan-shaped groove 1201. The cylindrical groove 1202 is coaxial with the first circular plate 2. A movable plate 1203 is provided in the fan-shaped groove 1201 and is hinged to the cylindrical groove 1202. The movable plate 1203 can rotate in the fan-shaped groove 1201 with the axis of the cylindrical groove 1202 as the center. The first pin 10 includes a first conductive column 1001 and a second conductive column 1002. The first conductive column 1001 is connected to the capacitor core 4, and the opposite ends of the two respectively penetrate the opposite sides of the cylindrical groove 1202. The first conductive column 1001 and the second conductive column 1002 are connected to each other. The opposite ends of the column 1002 are non-contacting, and a conductive block 1204 is installed on the movable plate 1203. The conductive block 1204 is a copper column. The two ends of the conductive block 1204 are respectively in contact with the first conductive column 1001 and the second conductive column 1002. The movable plate 1203 cooperates with the driving member 13 through the connecting member 1205. The first conductive column 1001 and the second conductive column 1002 are connected through the conductive block 1204. When the driving member 13 is actuated, the movable plate 1203 can be driven to move under the action of the connecting member 1205. At this time, the conductive block 1204 is separated from the first conductive column 1001 and the second conductive column 1002, and the first pin 10 is in a truncated state.

[0043] like Figure 4 and Figure 5 As shown, in some embodiments, the first conductive column 1001 and the second conductive column 1002 are both constructed with first contact surfaces 16 at opposite ends, and the two first contact surfaces 16 are symmetrically arranged. The conductive block 1204 is cooperatively constructed with second contact surfaces 17 at opposite ends, and the two second contact surfaces 17 respectively contact with the two first contact surfaces 16. Such a design makes it difficult for the conductive block 1204 to wear against the first conductive column 1001 and the second conductive column 1002 when sliding.

[0044] like Figure 7 and Figure 8As shown, in some embodiments, the driving member 13 includes a first compression spring 1301, the sealing shell 1 includes a second cylinder 101, the first cylinder 3 is coaxially arranged in the second cylinder 101, and the second sleeve 102 is movably matched on the outside of the second cylinder 101. The opposite ends of the second cylinder 101 and the second sleeve 102 are both matched with a first annular block 103 and a second annular block 104. The first annular block 103 is located on the outside of the second cylinder 101, and the second annular block 104 is located on the inside of the second sleeve 102. The first compression spring 1301 is sleeved on the outside of the second cylinder 101, and the two ends of the first compression spring 1301 are respectively in conflict with the opposite sides of the first annular block 103 and the second annular block 104. The first compression spring 1301 is used to provide a thrust forcing the second sleeve 102 to move toward the second cylinder 101. When the electrolyte vapor enters the sealed shell 1, the compressed gas can push the second sleeve 102 away from the second cylinder 101. At this time, the first compression spring 1301 is compressed, and the first annular block 103 is provided with a guide mechanism 1302. The guide mechanism 1302 can guide the movement of the second sleeve 102 so that the second sleeve 102 moves in a non-linear manner. This design can release the pressure of the internal electrolyte vapor while providing power, so that the second cylinder 101 and the second sleeve 102 are not easily damaged. A sealing rubber ring 105 is installed on the inner side of the second annular block 104. The sealing rubber ring 105 is a rubber ring and is movably overlapped with the outer side of the second cylinder 101, so as to improve the sealing performance of the connection between the second sleeve 102 and the second cylinder 101, so that the electrolyte vapor is not easily leaked.

[0045] like Figure 7 and Figure 8As shown, in some embodiments, the guide mechanism 1302 includes a sliding groove 13021 distributed in an annular shape on the circumference of the first annular block 103, the sliding groove 13021 extends toward the axial direction of the first annular block 103, and a sliding block 13022 is slidably matched in the sliding groove 13021. The sliding block 13022 is connected to the sliding groove 13021 through a second compression spring 13025. The sliding block 13022 extends out of the sliding groove 13021 under the action of the second compression spring 13025. A spiral groove 13023 is provided on the inner wall of the second sleeve 102. The sliding block 13022 movably contacts the spiral groove 13023, and the protruding end of the sliding block 13022 is accommodated by the spiral groove 13023. When the second sleeve 102 moves away from the second cylinder 101, under the cooperation of the sliding block 13022 and the spiral groove 13023, the second sleeve 1 02 can rotate and drive the movable plate 1203 to rotate through the connecting piece 1205 to disconnect the first pin 10. A strip groove 13024 is provided on the inner wall of the second sleeve 102 and is connected to the end of the spiral groove 13023. The depth of the strip groove 13024 is greater than the depth of the spiral groove 13023. The second sleeve 102 moves away from the second cylinder 101 under the action of the electrolyte vapor, and the sliding block 13022 moves from the end of the spiral groove 13023 to the end of the spiral groove 13023. At this time, the sliding block 13022 can enter the strip groove 13024. After the sealing shell 1 is cooled, under the action of thermal expansion and contraction and the first compression spring 1301, the second sleeve 102 moves toward the second cylinder 101. The sliding block 13022 can slide along the strip groove 13024 so that the movable plate 1203 will not be reset and connect the first pin 10.

[0046] like Figure 7 and Figure 8 As shown, in some embodiments, the end of the sliding block 13022 is constructed with a hemispherical surface 18, and the cross-sections of the spiral groove 13023 and the strip groove 13024 are both arc-shaped. This design reduces the friction resistance of the sliding block 13022 when it moves, making it easier to slide in the spiral groove 13023 and the strip groove 13024.

[0047] like Figure 4As shown, in some embodiments, the connecting member 1205 includes a guide column 12051 constructed on the movable plate 1203, the guide column 12051 is perpendicular to the movable plate 1203, an arc-shaped waist hole 12052 connected to the fan-shaped groove 1201 is opened on the sealing shell 1, and the second sleeve 102 is movably mounted on the opening of the arc-shaped waist hole 12052. The guide column 12051 slides tangentially with the arc-shaped waist hole 12052. When the movable plate 1203 rotates, the guide column 12051 can be moved in the arc-shaped waist hole 12052. 052, the inner wall of the second sleeve 102 is constructed with a slot 12053, and the guide post 12051 is slidably inserted in the slot 12053, that is, when the second sleeve 102 rotates in the process of moving away from the second cylinder 101, the guide post 12051 can slide in the direction away from the slot 12053, and force the movable plate 1203 to rotate through the guide post 12051, and when the second sleeve 102 moves toward the second cylinder 101, the guide post 12051 can be reinserted into the slot 12053.

[0048] like Figure 7 As shown, in some embodiments, a fixing frame 19 is annularly distributed on the inner wall of the second cylinder 101, and a plurality of airbags 14 are respectively arranged in the fixing frame 19. An opening 20 is configured at the end of the fixing frame 19, and the inner diameter of the opening 20 is smaller than the inner diameter of the fixing frame 19. The airbag 14 is inserted into the fixing frame 19 through the opening 20, and then the airbag 14 can be shaped by the fixing frame 19 to prevent it from being easily contacted with the first sleeve 5.

[0049] like Figure 2 and Fig. 9As shown, in some embodiments, the trigger member 15 includes a second circular plate 1501, and is rotatably installed at the bottom of the second sleeve 102. A plurality of tubes 1502 are annularly distributed on the second circular plate 1501, and the plurality of tubes 1502 are distributed on the outside of the first sleeve 5. A rod 1503 is provided in the tube 1502, and the rod 1503 is made of stainless steel. A magnetic block 1504 is connected to the tube 1502, and the magnetic block 1504 is a strong magnet. The rod 1503 is magnetically connected to the magnetic block 1504, and an acupuncture portion 1505 is configured at the end of the rod 1503. A fixed block 1506 is configured on the inner wall of the second cylinder 101, and the tube 1502 slides through the fixed block 1506. Under the cooperation of the fixed block 1506 and the tube 1502, when the second sleeve 102 rotates during movement, the second circular plate 1501 is The third compression spring 1508 is connected to the fixing block 1506, and the end of the third compression spring 1508 is in conflict with the annular plate 1507, which is used to provide a thrust forcing the rod 1503 to extend out of the tube 1502. The magnetic force of the magnetic block 1504 is greater than the elastic force of the third compression spring 1508, that is, when the rod 1503 is adsorbed by the magnetic block 1504, the third compression spring 1508 is in a compressed state, and when the second sleeve 102 moves, under the action of the annular plate 1507 and the fixing block 1506, the rod 1503 cannot move upward, so that the rod 1503 can be separated from the magnetic block 1504, and then the third compression spring 1508 is reset, and the rod 1503 can move quickly in the tube 1502, and the puncture part 1505 can enter the opening 20 and puncture the airbag 14.

[0050] like Figure 2 and Fig. 9 As shown, in some embodiments, the rod body 1503 is movably inserted into the tube body 1502. With this design, after the rod body 1503 is separated from the magnetic block 1504, the rod body 1503 can be launched from the tube body 1502. After the puncture part 1505 pierces the airbag 14, the rod body 1503 can shake, and the perforation on the airbag 14 is not easy to fit with the outer surface of the rod body 1503, thereby effectively reducing the situation where the airbag 14 does not explode.

[0051] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Flame retardant aluminum electrolytic capacitor, characterized in that: include: A sealed shell (1) is fixedly connected to a first circular plate (2), a first cylinder (3) is coaxially connected to the first circular plate (2), and a capacitor core (4) is provided in the first cylinder (3); A first sleeve (5) has a plurality of strip blocks (6) distributed in an annular manner on its inner wall, the plurality of strip blocks (6) all being slidably matched with the outer side of the first cylinder (3); a clamping groove (7) is distributed in an annular manner on the circumference of the first circular plate (2); a plurality of flexible sheets (8) are matched and constructed on the first sleeve (5), the flexible sheets (8) being clamped with the clamping groove (7); an annular pad (9) is laid on the mouth of the first cylinder (3) and is in contact and overlapped with the first sleeve (5); The first pin (10) and the second pin (11) are both mounted on the outside of the sealed shell (1), penetrate the first circular plate (2), and are connected to the capacitor core (4); the sealed shell (1) is provided with a cut-off mechanism (12), and the first pin (10) can be cut off by the cut-off mechanism (12); A driving member (13) is disposed in the sealing shell (1), and when the first cylinder (3) and the first sleeve (5) are separated, the driving member (13) can drive the cutting mechanism (12) to operate; A plurality of airbags (14) are spaced apart and distributed on the inner wall of the sealing shell (1); the airbags (14) are all filled with nitrogen; a triggering member (15) is provided on the top of the airbag (14) and is linked with the driving member (13); the plurality of airbags (14) can be exploded by the triggering member (15).

2. The flame-retardant aluminum electrolytic capacitor according to claim 1, characterized in that: The cut-off mechanism (12) comprises a fan-shaped groove (1201) constructed inside the sealing shell (1), the end of the fan-shaped groove (1201) is constructed with a columnar groove (1202), a movable plate (1203) is provided in the fan-shaped groove (1201) and is hinged to the columnar groove (1202), the first pin (10) comprises a first conductive column (1001) and a second conductive column (1002), the opposite ends of the first conductive column (1001) and the second conductive column (1002) respectively penetrate the opposite sides of the columnar groove (1202), a conductive block (1204) is mounted on the movable plate (1203), the two ends of the conductive block (1204) are respectively in contact and overlap with the first conductive column (1001) and the second conductive column (1002), and the movable plate (1203) is linked with the driving member (13) through a connecting member (1205).

3. The flame-retardant aluminum electrolytic capacitor according to claim 2, characterized in that: The first conductive column (1001) and the second conductive column (1002) are both configured with first contact surfaces (16) at their opposite ends, and the conductive block (1204) is configured with second contact surfaces (17) at its opposite ends, and the two second contact surfaces (17) are respectively in contact with the two first contact surfaces (16).

4. The flame-retardant aluminum electrolytic capacitor according to claim 3, characterized in that: The driving member (13) comprises a first compression spring (1301), and the sealing shell (1) comprises a second cylinder (101). The second cylinder (101) is movably matched with a second sleeve (102). The second cylinder (101) and the second sleeve (102) are both matched with a first annular block (103) and a second annular block (104) at opposite ends thereof. The first compression spring (1301) is sleeved on the outside of the second cylinder (101), and the two ends of the first compression spring (1301) respectively contact with the opposite sides of the first annular block (103) and the second annular block (104). The first annular block (103) is provided with a guide mechanism (1302), and the movement of the second sleeve (102) can be guided by the guide mechanism (1302). A sealing rubber ring (105) is installed on the inside of the second annular block (104), and is movably overlapped with the outside of the second cylinder (101).

5. The flame-retardant aluminum electrolytic capacitor according to claim 4, characterized in that: The guide mechanism (1302) comprises sliding grooves (13021) distributed in an annular shape around the first annular block (103), each of the sliding grooves (13021) being slidably fitted with a sliding block (13022), the sliding block (13022) being connected to the sliding groove (13021) via a second compression spring (13025), a spiral groove (13023) being provided on the inner wall of the second sleeve (102), the sliding block (13022) being movably in contact with the spiral groove (13023), and a strip groove (13024) being provided on the inner wall of the second sleeve (102) being communicated with the end of the spiral groove (13023).

6. The flame-retardant aluminum electrolytic capacitor according to claim 5, characterized in that: The end of the sliding block (13022) is constructed with a hemispherical surface (18), and the cross-sections of the spiral groove (13023) and the strip groove (13024) are both arc-shaped.

7. The flame-retardant aluminum electrolytic capacitor according to claim 5, characterized in that: The connecting member (1205) comprises a guide column (12051) constructed on the movable plate (1203); an arc-shaped waist hole (12052) connected to the fan-shaped groove (1201) is provided on the sealing shell (1); the guide column (12051) and the arc-shaped waist hole (12052) are slidably tangent to each other; a slot (12053) is constructed on the inner wall of the second sleeve (102); the guide column (12051) is slidably inserted into the slot (12053).

8. The flame-retardant aluminum electrolytic capacitor according to claim 7, characterized in that: A fixing frame (19) is distributed in an annular manner on the inner wall of the second cylinder (101), and a plurality of air bags (14) are respectively arranged in the fixing frame (19). An opening (20) is configured at the end of the fixing frame (19).

9. The flame-retardant aluminum electrolytic capacitor according to claim 8, characterized in that: The trigger member (15) comprises a second circular plate (1501) and is rotatably mounted on the bottom of the second sleeve (102); a plurality of tubes (1502) are distributed in an annular manner on the second circular plate (1501); a rod (1503) is provided in each of the tubes (1502); a magnetic block (1504) is connected in each of the tubes (1502); the rod (1503) is magnetically connected to the magnetic block (1504); a puncture portion (1505) is formed at the end of each of the rods (1503); a fixing block (1506) is formed on the inner wall of the second cylinder (101); the tube (1502) slides through the fixing block (1506); an annular plate (1507) is formed on the circumferential side of the rod (1503); a third compression spring (1508) is connected to the fixing block (1506); and an end of the third compression spring (1508) contacts the annular plate (1507).

10. The flame-retardant aluminum electrolytic capacitor according to claim 9, characterized in that: The rod body (1503) is movably inserted into the tube body (1502).

Images