A high temperature resistant flame retardant capacitor and its preparation process

Abstract

The invention discloses a high-temperature resistant flame-retardant capacitor and a preparation process thereof, and relates to the technical field of capacitors, including a capacitor body, an outer shell is arranged outside the capacitor body, a heat dissipation mechanism for dissipating heat when the capacitor body is bulged is slidably connected to the inner wall of the outer shell near one end of the capacitor body, and a sealing mechanism for isolating the capacitor from the outside is fixedly connected to the inner wall of the outer shell near the heat dissipation mechanism. The sealing mechanism provided by the invention isolates the external environment from the capacitor body, thereby preventing the high-temperature gas from contacting with oxygen in the air and causing violent combustion when the capacitor body leaks, thereby preventing other electrical components from being damaged and reducing losses. When the capacitor body leaks, the high-temperature gas is guided into the first set of rods through the through grooves on the heat-conducting strips, pushing the second set of rods to move, so that the sliding ring moves toward the bottom end of the capacitor body, and further increasing the sealing of the lower part of the capacitor body.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitors, and in particular to a high temperature resistant flame retardant capacitor and a preparation process thereof. Background Art

[0002] Capacitors are components that store electricity and energy. They are made by winding absorbent paper soaked in a paste electrolyte between two aluminum foils. Capacitors with a thin oxide film as a dielectric are aluminum electrolytic capacitors. During the use of aluminum electrolytic capacitors, factors such as short circuits and mechanical damage will cause the internal electrolyte to decompose and produce high-temperature gas, which will cause the capacitor to bulge or even explode. The Chinese patent with announcement number "CN112735817B" provides an explosion-proof and flame-retardant fully sealed capacitor. The application covers the capacitor by providing an outer shell and an explosion-proof outer shell. During normal use, the capacitor is completely isolated from the external environment and the heat dissipation effect is low. For capacitors that are not isolated from the outside world, when leakage occurs, the high-temperature gas generated by the high-temperature decomposition of the electrolyte contacts with oxygen in the air, which may cause violent combustion and damage other electrical components. Summary of the invention

[0003] The object of the present invention is to provide a high temperature resistant flame retardant capacitor and a preparation process thereof, so as to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0005] A high-temperature resistant and flame-retardant capacitor provided by the present invention comprises a capacitor body, wherein an outer shell is disposed outside the capacitor body, a heat dissipation mechanism for dissipating heat when the capacitor body bulges is slidably connected to the inner wall of the outer shell near one end of the capacitor body, and a sealing mechanism for isolating the capacitor from the outside is fixedly connected to the inner wall of the outer shell near the heat dissipation mechanism.

[0006] Furthermore, the heat dissipation mechanism includes a sliding ring slidably connected to the inner wall of the outer shell, the sliding ring is provided with connecting ports in a circumferential array, a first set of rods is fixedly connected in each of the connecting ports, a second set of rods is slidably connected in the first set of rods, a thermal conductive strip is fixedly connected to one end of the connecting port away from the first set of rods, the other end of the thermal conductive strip is fixedly connected to the top of the outer shell, a through groove is provided on the thermal conductive strip, a through hole is provided on the side wall of the thermal conductive strip, the through hole is connected to the through groove, a fixed net is fixedly connected to an array of positions of the sliding ring close to the capacitor body, and the other end of the fixed net is fixedly connected to the center of one end of the capacitor body.

[0007] Further, the closing mechanism includes a first fixing frame fixedly connected to the inner wall of the shell body, the first fixing frame is fixedly connected to a fixing ring, the fixing ring is slidably connected to a first closing plate, one end of the first closing plate is provided with a mounting groove, the other end of the first closing plate is fixedly connected to a second closing plate, the other end of the second closing plate is located in the mounting groove of the adjacent first closing plate, one end of the second closing plate located in the mounting groove is fixedly connected to a first spring, the other end of the first spring is fixedly connected to the inner wall of the mounting groove, the side wall of the first closing plate close to the mounting groove is fixedly connected to a fixing seat, the fixing seat is fixedly connected to a sliding block, the second closing plate is provided with a first sliding groove at a position corresponding to the sliding block, the sliding block is located in the first sliding groove, wherein a card slot is provided on a side of the first closing plate close to the first fixing frame, and a fixing component is engaged in the card slot.

[0008] Furthermore, the fixing assembly includes a sliding seat fixedly connected to the fixing ring, the sliding seat is provided with a second sliding groove, a clamping rod is slidably connected in the second sliding groove, a fixing block is fixedly connected to the clamping rod at a position away from the sliding seat, a second spring is fixedly connected to the fixing block, the other end of the second spring is fixedly connected to the sliding seat, and one end of the clamping rod extends outside the sliding seat and engages with the clamping groove.

[0009] Furthermore, one end of the clamping rod away from the sliding seat is fixedly connected to the sliding seat.

[0010] Furthermore, a second fixing frame is fixedly connected to the inner wall of the fixing ring, an end of the second fixing frame away from the fixing ring is fixedly connected to a support rod, a cover plate is fixedly connected to the position of the support rod on the first closing plate, and a blocking block is fixedly connected to an array on one side of the cover plate close to the first closing plate.

[0011] Furthermore, the blocking block is located on the second closing plate, and both ends of the blocking block are in contact with two adjacent first closing plates.

[0012] Furthermore, the first set of rods is located between the fixing ring and the outer shell.

[0013] Furthermore, the first set of rods is communicated with the through slot.

[0014] A preparation process of a high temperature resistant flame retardant capacitor comprises the following steps:

[0015] Step 1: Insert electrolytic paper between the anode foil and the cathode foil and roll them into a cell;

[0016] Step 2: Immerse the element in the electrolyte for impregnation treatment;

[0017] Step 3: Place the components in step 2 into the shell for sealing and assembly to form the capacitor body;

[0018] Step 4: Wrap the heat dissipation mechanism on the capacitor body and install it in the outer shell;

[0019] Step 5: Install the closure mechanism into the outer shell of step 4.

[0020] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0021] The present invention provides a heat dissipation mechanism to make the capacitor body contact with the outer shell, transfer the heat of the capacitor body to the outer shell, thereby cooling the capacitor body, avoiding the continuous increase in the temperature of the capacitor body causing the electrolyte to decompose and produce high-temperature gas, thereby avoiding continuous bulging of the capacitor body.

[0022] When the capacitor body leaks, the high-temperature gas is guided into the first set of rods through the through grooves on the heat-conducting strips, thereby pushing the second set of rods to move, causing the sliding ring to move toward the bottom end of the capacitor body, further increasing the sealing of the lower part of the capacitor body;

[0023] The sealing mechanism is set to isolate the external environment from the capacitor body, thereby preventing the high-temperature gas from coming into contact with oxygen in the air and causing violent combustion when the capacitor body leaks, thereby preventing other electrical components from being damaged and reducing losses.

[0024] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0028] Figure 3 is a side sectional view of the present invention;

[0029] Figure 4 It is a schematic diagram of the connection structure between the closing mechanism and the cover plate of the present invention;

[0030] Figure 5 is a schematic diagram of the connection structure of the first closing plate and the second closing plate of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the cover plate and the blocking block of the present invention;

[0032] Figure 7 It is an exploded view of the fixing assembly of the present invention.

[0033] In the figure:

[0034] 1. Capacitor body; 2. Outer shell; 3. Heat dissipation mechanism; 4. Closing mechanism; 5. Sliding ring; 6. Connecting port; 7. First set of rods; 8. Second set of rods; 9. Heat-conducting strip; 10. Through slot; 11. Through hole; 12. Fixed net; 13. First fixed frame; 14. Fixed ring; 15. First closing plate; 16. Mounting slot; 17. Second closing plate; 18. First spring; 19. Fixed seat; 20. Sliding block; 21. First sliding slot; 22. Clamping slot; 23. Fixed assembly; 24. Sliding seat; 25. Second sliding slot; 26. Clamping rod; 27. Fixed block; 28. Second spring; 29. ​​Second fixed frame; 30. Support rod; 31. Cover plate; 32. Blocking block. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the present application, 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. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0036] See also Figures 1 to 7 The present invention provides a high temperature resistant flame retardant capacitor, comprising a capacitor body 1, wherein an outer shell 2 is disposed outside the capacitor body 1, a heat dissipation mechanism 3 for dissipating heat when the capacitor body 1 is bulged is slidably connected to the inner wall of the outer shell 2 near one end of the capacitor body 1, and a sealing mechanism 4 for isolating the capacitor from the outside is fixedly connected to the inner wall of the outer shell 2 near the heat dissipation mechanism 3.

[0037] When the capacitor body 1 bulges, the heat dissipation mechanism 3 is provided to make the capacitor body 1 contact with the outer shell 2, and the heat of the capacitor body 1 is transferred to the outer shell 2, so as to cool the capacitor body 1, and prevent the temperature of the capacitor body 1 from continuing to rise, causing the electrolyte to decompose and produce high-temperature gas, thereby preventing the capacitor body 1 from continuing to bulge. The sealing mechanism 4 is provided to isolate the external environment from the capacitor body 1, so as to prevent the high-temperature gas from contacting with oxygen in the air and causing violent combustion when the capacitor body 1 leaks, thereby preventing other electrical components from being damaged and reducing losses.

[0038] See also Figure 2 and Figure 3The heat dissipation mechanism 3 includes a sliding ring 5 slidably connected to the inner wall of the outer shell 2, and the sliding ring 5 is provided with a communication port 6 in a circumferential array, each of the communication ports 6 is fixedly connected with a first set of rods 7, and the first set of rods 7 is slidably connected with a second set of rods 8, and the end of the communication port 6 away from the first set of rods 7 is fixedly connected with a thermal conductive bar 9, and the other end of the thermal conductive bar 9 is fixedly connected to the top of the outer shell 2, and a through groove 10 is formed on the thermal conductive bar 9, and a through hole 11 is formed on the side wall of the thermal conductive bar 9, and the through hole 11 is connected with the through groove 10, and a fixed net 12 is fixedly connected to the position array of the sliding ring 5 close to the capacitor body 1, and the other end of the fixed net 12 is fixedly connected to the center of one end of the capacitor body 1.

[0039] When the capacitor body 1 bulges, the position of the bulge of the capacitor body 1 changes, thereby causing the fixed net 12 covered on the capacitor body 1 to deform. One end of the fixed net 12 is fixedly connected to the center of one end of the capacitor body 1, so the fixed net 12 will drive the sliding ring 5 to move. The inner wall of the sliding ring 5 is equal to the diameter of the capacitor body 1, so that the sliding ring 5 separates the lower part of the capacitor body 1 from the upper part of the sliding ring 5. The sliding ring 5 isolates part of the capacitor body 1 to prevent the high-temperature gas leaking from the bottom of the capacitor body 1 from contacting with oxygen and causing violent combustion. The sliding ring 5 moves When the capacitor body 1 is moved, the heat conducting strip 9 is also driven to move, so that the heat conducting strip 9 is bent and deformed, so that the heat conducting strip 9 connects the outer shell 2 and the capacitor body 1, and the temperature of the capacitor body 1 is transferred to the outer shell 2, so as to cool and dissipate the heat of the capacitor body 1, and prevent the capacitor body 1 from continuously bulging. When the capacitor body 1 leaks, the high-temperature gas flows from the through hole 11 to the through groove 10, and then enters the first set of rods 7, and finally pushes the second set of rods 8 to move. The second set of rods 8 contacts the closing mechanism 4, so that the sliding ring 5 moves to the bottom end of the capacitor body 1, thereby increasing the sealing of the lower part of the capacitor body 1.

[0040] See also Figures 3 to 5The closing mechanism 4 includes a first fixing frame 13 fixedly connected to the inner wall of the outer shell 2, a fixing ring 14 fixedly connected to the first fixing frame 13, a first closing plate 15 slidably connected to the fixing ring 14, a mounting groove 16 is provided at one end of the first closing plate 15, a second closing plate 17 is fixedly connected to the other end of the first closing plate 15, the other end of the second closing plate 17 is located in the mounting groove 16 of the adjacent first closing plate 15, a first spring 18 is fixedly connected to one end of the second closing plate 17 located in the mounting groove 16, the other end of the first spring 18 is fixedly connected to the inner wall of the mounting groove 16, a fixing seat 19 is fixedly connected to the side wall of the first closing plate 15 close to the mounting groove 16, a sliding block 20 is fixedly connected to the fixing seat 19, a first sliding groove 21 is provided at a position of the second closing plate 17 corresponding to the sliding block 20, the sliding block 20 is located in the first sliding groove 21, wherein a card slot 22 is provided on a side of the first closing plate 15 close to the first fixing frame 13, and a fixing component 23 is carded in the card slot 22.

[0041] When the sliding ring 5 moves, the sliding ring 5 also drives the fixing assembly 23 to move, and the fixing assembly 23 is disengaged from the slot 22. Under the action of the first spring 18, the first closing plate 15 and the second closing plate 17 move away from each other, and the movement of the first closing plate 15 drives the fixing seat 19 to move. The movement of the fixing seat 19 causes the sliding block 20 to move synchronously, thereby causing the first closing plate 15 and the second closing plate 17 to move synchronously, and the second closing plate 17 is disengaged from the mounting slot 16. The first closing plate 15 and the second closing plate 17 seal the space between the outer shell 2 and the capacitor body 1, thereby isolating the capacitor body 1 from the outside, avoiding contact with oxygen to produce violent combustion, and preventing other electrical components from being damaged.

[0042] See also Figure 7 The fixing assembly 23 includes a sliding seat 24 fixedly connected to the fixing ring 14, the sliding seat 24 is provided with a second sliding groove 25, a clamping rod 26 is slidably connected in the second sliding groove 25, a fixing block 27 is fixedly connected to the clamping rod 26 at a position away from the sliding seat 24, a second spring 28 is fixedly connected to the fixing block 27, the other end of the second spring 28 is fixedly connected to the sliding seat 24, and one end of the clamping rod 26 extends outside the sliding seat 24 and engages with the clamping groove 22.

[0043] When the sliding ring 5 moves, the sliding ring 5 drives the clamping rod 26 to move, and the clamping rod 26 moves and disengages from the clamping slot 22, so that the first closing plate 15 and the second closing plate 17 can isolate the capacitor body 1 from the outside world. In the initial state, under the action of the second spring 28, the clamping rod 26 is located in the clamping slot 22, so that the first closing plate 15 and the second closing plate 17 are in a contracted state, and the capacitor body 1 is connected to the outside world, and heat is exchanged with the external environment to keep the temperature of the capacitor body 1 in a normal state.

[0044] See also Figure 2 One end of the clamping rod 26 away from the sliding seat 24 is fixedly connected to the sliding seat 24 , and the opening and closing states of the first closing plate 15 and the second closing plate 17 can be controlled by the clamping rod 26 .

[0045] See also Figure 4 and Figure 6 The inner wall of the fixing ring 14 is fixedly connected with a second fixing frame 29, and the end of the second fixing frame 29 away from the fixing ring 14 is fixedly connected with a support rod 30, and the support rod 30 is fixedly connected with a cover plate 31 at a position on the first closing plate 15, and the cover plate 31 is fixedly connected with a blocking block 32 in an array on one side close to the first closing plate 15.

[0046] See also Figure 2 and Figure 6 The blocking block 32 is located on the second closing plate 17 , and both ends of the blocking block 32 are in contact with two adjacent first closing plates 15 .

[0047] The cover plate 31 is provided to seal the position between the first closing plate 15 and the second closing plate 17 to prevent the capacitor body 1 from directly communicating with the outside world. The blocking block 32 is provided to seal the position between the first closing plate 15 and the second closing plate 17 when they are opened to prevent oxygen from contacting the capacitor body 1 through this position.

[0048] See also Figure 3 The first set of rods 7 is located between the fixing ring 14 and the outer shell 2. When the first closing plate 15 and the second closing plate 17 isolate the capacitor body 1 from the outside world, the first set of rods 7 and the second set of rods 8 can abut against the first closing plate 15, thereby pushing the sliding ring 5 to further seal the part under the capacitor body 1.

[0049] See also Figure 3 The first set of rods 7 is connected to the through groove 10, so that the high-temperature gas passes through the through groove 10 to drive the second set of rods 8 in the first set of rods 7 to move.

[0050] A preparation process of a high temperature resistant flame retardant capacitor, characterized by comprising the following steps:

[0051] Step 1: Insert electrolytic paper between the anode foil and the cathode foil and roll them into a cell;

[0052] Step 2: Immerse the element in the electrolyte for impregnation treatment;

[0053] Step 3: Place the elements in step 2 into the shell for sealing and assembly to form a capacitor body 1;

[0054] Step 4: Wrap the heat dissipation mechanism 3 on the capacitor body 1 and install it in the outer shell 2;

[0055] Step 5: Install the closing mechanism 4 into the outer shell 2 of step 4.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high temperature resistant flame retardant capacitor, characterized in that: The invention comprises a capacitor body (1), wherein the capacitor body (1) is covered with an outer shell (2), a heat dissipation mechanism (3) for dissipating heat when the capacitor body (1) bulges is slidably connected to the inner wall of the outer shell (2) at a position close to one end of the capacitor body (1), and a sealing mechanism (4) for isolating the capacitor from the outside is fixedly connected to the inner wall of the outer shell (2) at a position close to the heat dissipation mechanism (3); The heat dissipation mechanism (3) comprises a sliding ring (5) slidably connected to the inner wall of the outer shell (2); the sliding ring (5) is provided with communication ports (6) in an array along the circumferential direction; a first set of rods (7) is fixedly connected in each of the communication ports (6); a second set of rods (8) is slidably connected in the first set of rods (7); a heat conducting bar (9) is fixedly connected to one end of the communication port (6) away from the first set of rods (7); the other end of the heat conducting bar (9) is fixedly connected to the top of the outer shell (2); a through groove (10) is provided on the heat conducting bar (9); a through hole (11) is provided on the side wall of the heat conducting bar (9); the through hole (11) is connected to the through groove (10); a fixed net (12) is fixedly connected in an array at a position of the sliding ring (5) close to the capacitor body (1); the other end of the fixed net (12) is fixedly connected to the center of one end of the capacitor body (1).

2. A high temperature resistant flame retardant capacitor according to claim 1, characterized in that: The closing mechanism (4) comprises a first fixing frame (13) fixedly connected to the inner wall of the outer shell (2); a fixing ring (14) fixedly connected to the first fixing frame (13); a first closing plate (15) slidably connected to the fixing ring (14); a mounting groove (16) is formed at one end of the first closing plate (15); a second closing plate (17) is fixedly connected to the other end of the first closing plate (15); the other end of the second closing plate (17) is located in the mounting groove (16) of the adjacent first closing plate (15); and a first spring is fixedly connected to the end of the second closing plate (17) located in the mounting groove (16). (18), the other end of the first spring (18) is fixedly connected to the inner wall of the mounting groove (16), the side wall of the first closing plate (15) close to the mounting groove (16) is fixedly connected to a fixing seat (19), a sliding block (20) is fixedly connected to the fixing seat (19), a first sliding groove (21) is formed at a position of the second closing plate (17) corresponding to the sliding block (20), the sliding block (20) is located in the first sliding groove (21), wherein a clamping groove (22) is formed on one side of the first closing plate (15) close to the first fixing frame (13), a fixing component (23) is clamped in the clamping groove (22).

3. A high temperature resistant flame retardant capacitor according to claim 2, characterized in that: The fixing assembly (23) comprises a sliding seat (24) fixedly connected to the fixing ring (14); the sliding seat (24) is provided with a second sliding groove (25); a clamping rod (26) is slidably connected in the second sliding groove (25); a fixing block (27) is fixedly connected to the clamping rod (26) at a position away from the sliding seat (24); a second spring (28) is fixedly connected to the fixing block (27); the other end of the second spring (28) is fixedly connected to the sliding seat (24); one end of the clamping rod (26) extends outside the sliding seat (24) and is clamped with the clamping groove (22).

4. A high temperature resistant flame retardant capacitor according to claim 3, characterized in that: One end of the clamping rod (26) away from the sliding seat (24) is fixedly connected to the sliding seat (24).

5. A high temperature resistant flame retardant capacitor according to claim 2, characterized in that: A second fixing frame (29) is fixedly connected to the inner wall of the fixing ring (14); an end of the second fixing frame (29) away from the fixing ring (14) is fixedly connected to a support rod (30); a cover plate (31) is fixedly connected to the position of the support rod (30) located on the first closing plate (15); and a blocking block (32) is fixedly connected in an array on one side of the cover plate (31) close to the first closing plate (15).

6. A high temperature resistant flame retardant capacitor according to claim 5, characterized in that: The blocking block (32) is located on the second closing plate (17), and both ends of the blocking block (32) are in contact with two adjacent first closing plates (15).

7. A high temperature resistant flame retardant capacitor according to claim 2, characterized in that: The first sleeve rod (7) is located between the fixing ring (14) and the outer shell (2).

8. The high temperature resistant flame retardant capacitor according to claim 1, characterized in that: The first sleeve rod (7) is in communication with the through slot (10).

9. A process for preparing a high temperature resistant flame retardant capacitor according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Insert electrolytic paper between the anode foil and the cathode foil and roll them into a cell; Step 2: Immerse the element in the electrolyte for impregnation treatment; Step 3: Place the elements in step 2 into the shell and seal and assemble to form the capacitor body (1); Step 4: Wrap the heat dissipation mechanism (3) on the capacitor body (1) and install it in the outer shell (2); Step 5: Install the closing mechanism (4) into the outer shell (2) of step 4.

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