CN114334454A - Bakelite shell explosion-proof thin film starting capacitor and preparation process thereof - Google Patents
Bakelite shell explosion-proof thin film starting capacitor and preparation process thereof Download PDFInfo
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- CN114334454A CN114334454A CN202111640932.9A CN202111640932A CN114334454A CN 114334454 A CN114334454 A CN 114334454A CN 202111640932 A CN202111640932 A CN 202111640932A CN 114334454 A CN114334454 A CN 114334454A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 62
- 229920001342 Bakelite® Polymers 0.000 title claims abstract description 22
- 239000004637 bakelite Substances 0.000 title claims abstract description 22
- 239000010409 thin film Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
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- 238000005507 spraying Methods 0.000 claims abstract description 33
- 238000004804 winding Methods 0.000 claims abstract description 27
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000010931 gold Substances 0.000 claims abstract description 26
- 229910052737 gold Inorganic materials 0.000 claims abstract description 26
- 239000003822 epoxy resin Substances 0.000 claims abstract description 23
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 23
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- -1 polypropylene Polymers 0.000 claims abstract description 22
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- 229920001971 elastomer Polymers 0.000 claims abstract description 18
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011701 zinc Substances 0.000 claims abstract description 11
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 11
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- 238000001816 cooling Methods 0.000 claims description 7
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- 238000005259 measurement Methods 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims description 2
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- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 abstract description 7
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- 238000012360 testing method Methods 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
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- 239000011888 foil Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses an explosion-proof thin film starting capacitor with a bakelite shell and a preparation process thereof, wherein the preparation process comprises the following steps: the shell and the rubber cover enclose to form a cavity; the core body is arranged in the cavity, a mandrel is arranged at the middle shaft of the core body, and the core body is made of a polypropylene film; the epoxy resin layer is encapsulated between the shell and the core body; an electrode connected to the core; the metal spraying layer is arranged at the end part of the core body; according to the invention, zinc-aluminum alloy is used as a material of an electrode, the zinc-aluminum alloy is uniformly evaporated on a polypropylene film through high-temperature melting and evaporation to form an electrode of a capacitor, the polypropylene film is used as a medium, a cylindrical core is formed through multilayer composite winding, 99.99% of zinc is sprayed on two ends of the core to form a gold spraying layer which is used as an extraction electrode, and the core is wrapped by an insulating medium and sealed by epoxy resin; the self-healing function of the polypropylene film is superior, the capacity attenuation reduction function of the capacitor after continuous charging and discharging is met, the dielectric loss is small, the insulation impedance is high, and the performance is stable.
Description
Technical Field
The invention relates to the technical field of capacitors, in particular to an explosion-proof thin film starting capacitor with a bakelite shell and a preparation process thereof.
Background
As shown in fig. 1, a conventional motor start capacitor is manufactured by using a paper-medium aluminum foil as an electrode, using plastic or aluminum as a housing, filling electrolyte into a core package, and performing chemical reaction between the electrolyte and the aluminum foil to generate a capacitance.
The traditional starting capacitor has the defects of low charging and discharging times, poor self-healing property, rapid capacity attenuation after continuous charging and discharging, serious capacity loss after 5000 times of charging and discharging basically, incapability of meeting market requirements and poor voltage impact resistance. Therefore, a large number of high-end starting capacitor products need to be imported from foreign countries, the price is high, and the purchase period is long.
Disclosure of Invention
The invention aims to provide an explosion-proof thin-film starting capacitor with a bakelite shell and a preparation process thereof, and solves the following technical problems:
the traditional starting capacitor has the defects of low charging and discharging times, poor self-healing property and rapid capacity attenuation after continuous charging and discharging.
The purpose of the invention can be realized by the following technical scheme:
bakelite shell explosion-proof type film starting capacitor includes:
the shell and the rubber cover enclose to form a cavity;
the core body is arranged in the cavity, a mandrel is arranged at the middle shaft of the core body, and the core body is made of a polypropylene film;
the epoxy resin layer is encapsulated between the shell and the core body;
an electrode connected to the core; and
and the gold spraying layer is arranged at the end part of the core body.
As a further scheme of the invention: the shell is connected with the rubber cover through a fixing piece.
As a further scheme of the invention: the rubber cover is provided with an explosion-proof hole.
As a further scheme of the invention: the rubber cover comprises an epoxy plate and a sealing layer applied to the outside of the epoxy plate.
The preparation process of the bakelite shell explosion-proof thin-film starting capacitor comprises the following steps:
step 1): compounding and winding a polypropylene film to obtain a core body;
step 2): setting the core body at the temperature of 100 ℃ for 8 hours;
step 3): spraying 99.99% of zinc on two ends of the core body to form a gold spraying layer with the thickness of 0.60 +/-0.1 mm as an extraction electrode;
step 4): performing pre-spot welding on the gold-sprayed layer, wherein the pre-spot welding temperature is 320-420 ℃, and the pre-spot welding time is not more than 3 s;
step 5): carrying out thermal polymerization on the core body, and cooling to below 60 ℃;
step 6): enabling the core body for half measurement;
step 7): respectively welding two electrodes to two ends of the core body, welding one end of an insulating medium to the end part of the capacitor, and welding the other end of the insulating medium to a lead-out electrode of the capacitor;
step 8): encapsulating by using epoxy resin, and completely covering the core body to form an epoxy resin layer; and
step 9): and packaging by adopting a rubber cover with an explosion-proof hole.
As a further scheme of the invention: checking the rotation flexibility of the roll shaft before winding in the step 1), checking whether a film threading route is correct, and checking whether the film surface is scratched, oxidized and wrinkled.
As a further scheme of the invention: the temperature of the winding environment in the step 1) is 20-30 ℃, the relative humidity is less than 50%, the misalignment in the winding process is 0.8-1.2mm, and the capacity is between 3% lower than the round core and 1% higher than the round core.
As a further scheme of the invention: enabling in the step 6) to respectively be alternating current low voltage 50V, alternating current high voltage 250V, direct current low voltage 100V/um, direct current high voltage: 710V at 5 μm, 852V at 6 μm, 7 μm and 1278V at 8 μm, 9 μm and 1420V at 10 μm.
The invention has the beneficial effects that:
(1) according to the invention, zinc-aluminum alloy is used as a material of an electrode, the zinc-aluminum alloy is uniformly evaporated on a polypropylene film through high-temperature melting and evaporation to form an electrode of a capacitor, the polypropylene film is used as a medium, a cylindrical core is formed through multilayer composite winding, 99.99% of zinc is sprayed on two ends of the core to form a gold spraying layer which is used as an extraction electrode, and the core is wrapped by an insulating medium and sealed by epoxy resin; through the excellent self-healing function of the polypropylene film, the charge and discharge test of the capacitor for 100000 times can be met, the capacity attenuation cannot exceed 3 percent, the effect of reducing the capacity attenuation of the capacitor after continuous charge and discharge is realized, the dielectric loss is small, the insulation impedance is high, and the performance is stable;
(2) in the invention, the explosion-proof hole is arranged on the rubber cover, so that the effect of preventing the capacitor from exploding is achieved.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of a prior art structure;
FIG. 2 is a schematic view of the overall structure of the present invention;
fig. 3 is a schematic view of the structure of the explosion-proof hole in the present invention.
In the figure: 1. a rubber cover; 2. an epoxy board; 3. an electrode; 4. a housing; 5. a core body; 6. a mandrel; 7. an epoxy resin layer; 8. spraying a gold layer; 9. an insulating medium; 10. a resistance; 11. an explosion-proof hole; 12. a plug-in terminal; 13. and a fixing member.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 2-3, the present invention is a bakelite shell explosion-proof thin film starting capacitor, including:
the shell 4 and the rubber cover 1 enclose to form a cavity;
the core body 5 is arranged in the cavity, a mandrel 6 is arranged at the middle shaft of the core body 5, and the core body 5 is made of a polypropylene film;
the epoxy resin layer 7 is encapsulated between the shell 4 and the core 5;
an electrode 3 connected to the core 5; and
and the gold spraying layer 8 is arranged at the end part of the core body 5.
In one aspect of the present embodiment, the core 5 is provided with a resistor 10 and a plug terminal 12, the end of the core 5 is provided with an insulating medium 9, and the housing 4 is made of bakelite to protect the core 5.
In practical application, zinc-aluminum alloy is used as a material of the electrode 3, the zinc-aluminum alloy is uniformly evaporated on a polypropylene film to form the electrode 3 of the capacitor, the polypropylene film is used as a medium, a cylindrical core body 5 is formed by multilayer composite winding, 99.99% of zinc is sprayed on two ends of the core body 5 to form a gold spraying layer 8 which is used as a lead-out electrode, an insulating medium 9 is coated outside the gold spraying layer, and epoxy resin is sealed to form the capacitor. The capacitor has no polarity, and has the main advantages of good frequency characteristic (wide frequency response), small dielectric loss, high insulation impedance, stable performance, impact current resistance, strong overload capacity, excellent self-healing performance and the like. The capacitor has the advantages of high voltage and large current impact resistance, self-healing performance, capacity attenuation not exceeding 3 percent and capability of meeting the charge and discharge test of 100000 times of the capacitor, the effect of capacity attenuation reduction of the capacitor after continuous charge and discharge is realized, the capacitor also has the functions of good sealing performance, water resistance and moisture resistance, the service life is safely superior to that of similar products in the market, and the market demand is met.
Example 2
As shown in fig. 2-3, as a preferred embodiment of the present invention, the housing 4 is connected to the rubber cover 1 by a fixing member 13.
In one aspect of the present embodiment, the fixing member 13 may be a saw-tooth clip as shown in fig. 3, or may be an engaging plate that slidably engages with the housing 4 and the rubber cover 1, respectively, and the present embodiment is not limited in particular.
In practical application of the present embodiment, the fixing member 13 is provided to enhance the stability of the connection between the housing 4 and the rubber cover 1.
Example 3
As shown in fig. 3, as a preferred embodiment of the present invention, the rubber cover 1 is provided with an explosion-proof hole 11.
This embodiment is when practical application, and the inside a large amount of breakdown that appears of electric capacity produces gas, can break through explosion-proof hole 11, prevents that the product from exploding, plays the safety function.
Example 4
As shown in fig. 2, as a preferred embodiment of the present invention, the adhesive cover 1 includes an epoxy plate 2 and a sealing layer applied to the outside thereof.
In practical application of this embodiment, the rubber cover 1 uses the epoxy plate 2 as a base material, and a layer of latex is applied externally as a sealing layer, and of course, the sealing layer may also be made of materials such as silica gel and rubber, and this embodiment is not specifically limited herein.
Referring to fig. 2-3, the present invention further provides a manufacturing process of the bakelite shell explosion-proof thin-film capacitor, which is described in the above embodiments, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 5
The preparation process of the bakelite shell explosion-proof thin-film starting capacitor comprises the following steps:
step 1): checking the rotation flexibility of a roll shaft, checking whether a film passing route is correct, checking whether the film surface is scratched, oxidized or wrinkled, compositely winding a polypropylene film, wherein the temperature of a winding environment is 20 ℃, the relative humidity is 10%, the misalignment is 0.8mm in the winding process, and the capacity is lower than that of a round core by 3%, so as to obtain a core body 5;
step 2): setting the core body 5 at the temperature of 100 ℃ for 8 hours;
step 3): spraying 99.99% of zinc on two ends of the core body 5 to form a gold spraying layer 8 with the thickness of 0.5mm as an extraction electrode;
step 4): performing pre-spot welding on the gold-sprayed layer 8, wherein the temperature of the pre-spot welding is 320 ℃, and the time of the pre-spot welding is 0.5 s;
step 5): carrying out thermal polymerization on the core body 5, and cooling to 10 ℃;
step 6): and performing energized half-test on the core body 5, wherein the energized state is respectively 50V of alternating current low voltage, 250V of alternating current high voltage, 100V/um of direct current low voltage and direct current high voltage: 710V at 5 μm, 852V at 6 μm, 7 μm and 1278V at 8 μm, 9 μm and 1420V at 10 μm;
step 7): welding two electrodes 3 to two ends of a core body 5 respectively, welding one end of an insulating medium 9 to the end part of the capacitor, and welding the other end of the insulating medium to a lead-out electrode of the capacitor;
step 8): encapsulating by using epoxy resin, and completely covering the core body 5 to form an epoxy resin layer 7; and
step 9): the encapsulation is performed by using the glue cover 1 with the explosion-proof hole 11.
In one case of this embodiment, after the gold-sprayed layer 8 is formed, a spot welding point for spot welding is specified according to a manufacturing work sheet or other process files, and during the spot welding, if the core diameter of the spot welding is smaller than 20mm, a 100W electric soldering iron is allowed to be used, and the rest is a 200W electric soldering iron; the insulating medium 9 is made of copper foil, and the outer surface of the copper foil is wrapped with a PC material.
Note that, after the gold spraying in step 4), the outer wrapping paper needs to be removed, at this time, ten million of the cores 5 cannot be scratched, and the surface of the core 5 is inspected to ensure that no gold spraying dust remains thereon, and special attention should be paid to the occurrence of the bipolar connection phenomenon.
Example 6
The preparation process of the bakelite shell explosion-proof thin-film starting capacitor comprises the following steps:
step 1): checking the rotation flexibility of a roll shaft, checking whether a film passing route is correct, checking whether the film surface is scratched, oxidized or wrinkled, compositely winding a polypropylene film, wherein the temperature of a winding environment is 30 ℃, the relative humidity is 40%, the misalignment is 1.2mm in the winding process, and the capacity is 1% higher than that of a round core to obtain a core body 5;
step 2): setting the core body 5 at the temperature of 100 ℃ for 8 hours;
step 3): spraying 99.99% of zinc on two ends of the core body 5 to form a gold spraying layer 8 with the thickness of 0.7mm as an extraction electrode;
step 4): performing pre-spot welding on the gold-sprayed layer 8, wherein the pre-spot welding temperature is 420 ℃, and the pre-spot welding time is 3 s;
step 5): carrying out thermal polymerization on the core body 5, and cooling to 50 ℃;
step 6): and performing energized half-test on the core body 5, wherein the energized state is respectively 50V of alternating current low voltage, 250V of alternating current high voltage, 100V/um of direct current low voltage and direct current high voltage: 710V at 5 μm, 852V at 6 μm, 7 μm and 1278V at 8 μm, 9 μm and 1420V at 10 μm;
step 7): welding two electrodes 3 to two ends of a core body 5 respectively, welding one end of an insulating medium 9 to the end part of the capacitor, and welding the other end of the insulating medium to a lead-out electrode of the capacitor;
step 8): encapsulating by using epoxy resin, and completely covering the core body 5 to form an epoxy resin layer 7; and
step 9): the encapsulation is performed by using the glue cover 1 with the explosion-proof hole 11.
In one case of this embodiment, after the gold-sprayed layer 8 is formed, a spot welding point for spot welding is specified according to a manufacturing work sheet or other process files, and during the spot welding, if the core diameter of the spot welding is smaller than 20mm, a 100W electric soldering iron is allowed to be used, and the rest is a 200W electric soldering iron; the insulating medium 9 is made of copper foil, and the outer surface of the copper foil is wrapped with a PC material.
Note that, after the gold spraying in step 4), the outer wrapping paper needs to be removed, at this time, ten million of the cores 5 cannot be scratched, and the surface of the core 5 is inspected to ensure that no gold spraying dust remains thereon, and special attention should be paid to the occurrence of the bipolar connection phenomenon.
Example 7
The preparation process of the bakelite shell explosion-proof thin-film starting capacitor comprises the following steps:
step 1): checking the rotation flexibility of a roll shaft, checking whether a film passing route is correct, checking whether the film surface is scratched, oxidized or wrinkled, compositely winding a polypropylene film, wherein the temperature of a winding environment is 25 ℃, the relative humidity is 25%, the misalignment is 1mm in the winding process, and the capacity is lower than 1% of that of a round core to obtain a core body 5;
step 2): setting the core body 5 at the temperature of 100 ℃ for 8 hours;
step 3): spraying 99.99% of zinc on two ends of the core body 5 to form a gold spraying layer 8 with the thickness of 0.6mm as an extraction electrode;
step 4): pre-spot welding is carried out on the gold-sprayed layer 8, the temperature of the pre-spot welding is 370 ℃, and the time of the pre-spot welding is 1.5 s;
step 5): carrying out thermal polymerization on the core body 5, and cooling to 30 ℃;
step 6): and performing energized half-test on the core body 5, wherein the energized state is respectively 50V of alternating current low voltage, 250V of alternating current high voltage, 100V/um of direct current low voltage and direct current high voltage: 710V at 5 μm, 852V at 6 μm, 7 μm and 1278V at 8 μm, 9 μm and 1420V at 10 μm;
step 7): welding two electrodes 3 to two ends of a core body 5 respectively, welding one end of an insulating medium 9 to the end part of the capacitor, and welding the other end of the insulating medium to a lead-out electrode of the capacitor;
step 8): encapsulating by using epoxy resin, and completely covering the core body 5 to form an epoxy resin layer 7; and
step 9): the encapsulation is performed by using the glue cover 1 with the explosion-proof hole 11.
In one case of this embodiment, after the gold-sprayed layer 8 is formed, a spot welding point for spot welding is specified according to a manufacturing work sheet or other process files, and during the spot welding, if the core diameter of the spot welding is smaller than 20mm, a 100W electric soldering iron is allowed to be used, and the rest is a 200W electric soldering iron; the insulating medium 9 is made of copper foil, and the outer surface of the copper foil is wrapped with a PC material.
Note that, after the gold spraying in step 4), the outer wrapping paper needs to be removed, at this time, ten million of the cores 5 cannot be scratched, and the surface of the core 5 is inspected to ensure that no gold spraying dust remains thereon, and special attention should be paid to the occurrence of the bipolar connection phenomenon.
Example 8
The preparation process of the bakelite shell explosion-proof thin-film starting capacitor comprises the following steps:
step 1): checking the rotation flexibility of a roll shaft, checking whether a film passing route is correct, checking whether the film surface is scratched, oxidized or wrinkled, compositely winding a polypropylene film, wherein the temperature of a winding environment is 22 ℃, the relative humidity is 15%, the misalignment is 0.9mm in the winding process, and the capacity is lower than that of a round core by 2%, so as to obtain a core body 5;
step 2): setting the core body 5 at the temperature of 100 ℃ for 8 hours;
step 3): spraying 99.99% of zinc on two ends of the core body 5 to form a gold spraying layer 8 with the thickness of 0.6mm as an extraction electrode;
step 4): performing pre-spot welding on the gold-sprayed layer 8, wherein the pre-spot welding temperature is 350 ℃, and the pre-spot welding time is 1 s;
step 5): carrying out thermal polymerization on the core body 5, and cooling to 15 ℃;
step 6): and performing energized half-test on the core body 5, wherein the energized state is respectively 50V of alternating current low voltage, 250V of alternating current high voltage, 100V/um of direct current low voltage and direct current high voltage: 710V at 5 μm, 852V at 6 μm, 7 μm and 1278V at 8 μm, 9 μm and 1420V at 10 μm;
step 7): welding two electrodes 3 to two ends of a core body 5 respectively, welding one end of an insulating medium 9 to the end part of the capacitor, and welding the other end of the insulating medium to a lead-out electrode of the capacitor;
step 8): encapsulating by using epoxy resin, and completely covering the core body 5 to form an epoxy resin layer 7; and
step 9): the encapsulation is performed by using the glue cover 1 with the explosion-proof hole 11.
In one case of this embodiment, after the gold-sprayed layer 8 is formed, a spot welding point for spot welding is specified according to a manufacturing work sheet or other process files, and during the spot welding, if the core diameter of the spot welding is smaller than 20mm, a 100W electric soldering iron is allowed to be used, and the rest is a 200W electric soldering iron; the insulating medium 9 is made of copper foil, and the outer surface of the copper foil is wrapped with a PC material.
Note that, after the gold spraying in step 4), the outer wrapping paper needs to be removed, at this time, ten million of the cores 5 cannot be scratched, and the surface of the core 5 is inspected to ensure that no gold spraying dust remains thereon, and special attention should be paid to the occurrence of the bipolar connection phenomenon.
Example 9
The preparation process of the bakelite shell explosion-proof thin-film starting capacitor comprises the following steps:
step 1): checking the rotation flexibility of a roll shaft, checking whether a film passing route is correct, checking whether the film surface is scratched, oxidized or wrinkled, compositely winding a polypropylene film, wherein the temperature of a winding environment is 27 ℃, the relative humidity is 35%, the misalignment is 1.1mm in the winding process, and the capacity is the same as that of a round core to obtain a core body 5;
step 2): setting the core body 5 at the temperature of 100 ℃ for 8 hours;
step 3): spraying 99.99% of zinc on two ends of the core body 5 to form a gold spraying layer 8 with the thickness of 0.6mm as an extraction electrode;
step 4): performing pre-spot welding on the gold-sprayed layer 8, wherein the pre-spot welding temperature is 390 ℃, and the pre-spot welding time is 2 s;
step 5): carrying out thermal polymerization on the core body 5, and cooling to 45 ℃;
step 6): and performing energized half-test on the core body 5, wherein the energized state is respectively 50V of alternating current low voltage, 250V of alternating current high voltage, 100V/um of direct current low voltage and direct current high voltage: 710V at 5 μm, 852V at 6 μm, 7 μm and 1278V at 8 μm, 9 μm and 1420V at 10 μm;
step 7): welding two electrodes 3 to two ends of a core body 5 respectively, welding one end of an insulating medium 9 to the end part of the capacitor, and welding the other end of the insulating medium to a lead-out electrode of the capacitor;
step 8): encapsulating by using epoxy resin, and completely covering the core body 5 to form an epoxy resin layer 7; and
step 9): the encapsulation is performed by using the glue cover 1 with the explosion-proof hole 11.
In one case of this embodiment, after the gold-sprayed layer 8 is formed, a spot welding point for spot welding is specified according to a manufacturing work sheet or other process files, and during the spot welding, if the core diameter of the spot welding is smaller than 20mm, a 100W electric soldering iron is allowed to be used, and the rest is a 200W electric soldering iron; the insulating medium 9 is made of copper foil, and the outer surface of the copper foil is wrapped with a PC material.
Note that, after the gold spraying in step 4), the outer wrapping paper needs to be removed, at this time, ten million of the cores 5 cannot be scratched, and the surface of the core 5 is inspected to ensure that no gold spraying dust remains thereon, and special attention should be paid to the occurrence of the bipolar connection phenomenon.
Content of the experiment
Capacitors were produced according to the procedures of examples 5 to 9, respectively.
Cyclic voltammetry testing: cyclic voltammetry is a commonly used electrochemical test method. The position of an oxidation reduction peak can be visually seen from a cyclic voltammetry curve, and when the cycle number is set to be large, the cyclic stability of the prepared material can be reflected from the condition of curve superposition. The testing instrument adopts an LCR digital bridge and a CBE-9800 capacitor durability testing device; the determination standard is that the maximum allowable temperature is +/-2 ℃, 2s is filled with the solution for 2s, and leakage and bubble generation cannot occur after 100000 times. The results are shown in table 1, with data units of tg δ (. about.10)-4)。
Table 1:
as can be seen from table 1, the capacitors prepared in examples 5 to 9 of the present invention have a capacity fade of not more than 3% in 5000 times and 100000 times of charge and discharge tests, and thus, the effect of decreasing the capacity fade of the capacitor after continuous charge and discharge is achieved, and the capacitor has excellent specific capacitance and cycle stability. Can meet the requirements of the industry and has better application prospect.
The working principle of the invention is as follows: the invention has provided the explosion-proof type film starting capacitor of bakelite shell and its preparation method in the above-mentioned embodiment, regard zinc-aluminum alloy as the material of the electrode 3, through melting and evaporating the homogeneous evaporation on the polypropylene film at the high temperature, form the electrode 3 of the electric capacity, the polypropylene film is regarded as the medium, through the multilayer complex winding, form the cylindrical core 5, spray 99.99% zinc on both ends of the core 5 and form and spray the gold layer 8, as the leading-out electrode, and wrap up with the insulating medium 9, the epoxy resin is sealed to get final product; through the excellent self-healing function of the polypropylene film, the charge and discharge test of the capacitor for 100000 times can be met, the capacity attenuation cannot exceed 3 percent, and the effect of reducing the capacity attenuation after the capacitor is continuously charged and discharged is realized.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (8)
1. Bakelite shell explosion-proof type film start capacitor, its characterized in that includes:
the shell (4) and the rubber cover (1) enclose to form a cavity;
the core body (5) is arranged in the cavity, a mandrel (6) is arranged at the middle shaft of the core body (5), and the core body (5) is made of a polypropylene film;
the epoxy resin layer (7) is encapsulated between the shell (4) and the core body (5);
an electrode (3) connected to the core (5); and
and the gold spraying layer (8) is arranged at the end part of the core body (5).
2. The bakelite shell explosion-proof type membrane starting capacitor according to claim 1, wherein the shell (4) and the rubber cover (1) are connected through a fixing member (13).
3. The bakelite-case explosion-proof type film starting capacitor according to claim 1, wherein the plastic cover (1) is provided with explosion-proof holes (11).
4. A bakelite-case explosion-proof type thin-film starting capacitor according to claim 3, characterised in that the glue cap (1) comprises an epoxy plate (2) and a sealing layer applied to the outside thereof.
5. The process for preparing the bakelite shell explosion-proof type film starting capacitor according to claim 4, which is characterized by comprising the following steps of:
step 1): compositely winding the polypropylene film to obtain a core body (5);
step 2): setting the core body (5) for 8 hours at the temperature of 100 ℃;
step 3): spraying 99.99% of zinc on two ends of the core body (5) to form a gold spraying layer (8) with the thickness of 0.60 +/-0.1 mm as an extraction electrode;
step 4): performing pre-spot welding on the gold-sprayed layer (8), wherein the pre-spot welding temperature is 320-420 ℃, and the pre-spot welding time is not more than 3 s;
step 5): carrying out thermal polymerization on the core body (5), and cooling to below 60 ℃;
step 6): enabling half-measurement is carried out on the core body (5);
step 7): welding two electrodes (3) to two ends of a core body (5) respectively, welding one end of an insulating medium (9) to the end part of the capacitor, and welding the other end of the insulating medium to a lead-out electrode of the capacitor;
step 8): encapsulating by using epoxy resin, and completely covering the core body (5) to form an epoxy resin layer (7); and
step 9): and packaging by using a rubber cover (1) with an explosion-proof hole (11).
6. The process for preparing an explosion-proof thin film starting capacitor with a bakelite shell according to claim 5, wherein the step 1) is carried out by checking the rotation flexibility of the roller shaft before winding, checking whether the film passing route is correct, and checking whether the film surface is scratched, oxidized or wrinkled.
7. The process for preparing the explosion-proof thin-film starting capacitor with the bakelite shell according to claim 5, wherein the temperature of the winding environment in the step 1) is 20-30 ℃, the relative humidity is less than 50%, the misalignment in the winding process is 0.8-1.2mm, and the capacity is between 3% lower than the round core and 1% higher than the round core.
8. The preparation process of the bakelite shell explosion-proof type film starting capacitor according to claim 5, wherein the energization in the step 6) is respectively 50V of alternating current low voltage, 250V of alternating current high voltage, 100V/um of direct current low voltage and 100V/um of direct current high voltage: 710V at 5 μm, 852V at 6 μm, 7 μm and 1278V at 8 μm, 9 μm and 1420V at 10 μm.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201181645Y (en) * | 2008-04-21 | 2009-01-14 | 安徽源光电器有限公司 | High temperature capacitor |
| CN101916660A (en) * | 2010-07-12 | 2010-12-15 | 无锡宏广电容器有限公司 | Metalized film capacitor |
| JP2013197430A (en) * | 2012-03-22 | 2013-09-30 | Hitachi Aic Inc | Film capacitor |
| CN203444983U (en) * | 2013-05-27 | 2014-02-19 | 上海皓月电气有限公司 | Highly reliable motor starting/intermittent operation capacitor |
| CN104143436A (en) * | 2014-07-22 | 2014-11-12 | 安徽鑫阳电子有限公司 | Point-contact-typed explosion-proof capacitor for conductive column |
| CN104465092A (en) * | 2014-12-11 | 2015-03-25 | 铜陵市启动电子制造有限责任公司 | Manufacturing method for anti-electromagnetic interference thin-film capacitor |
| CN106128759A (en) * | 2016-08-11 | 2016-11-16 | 苏州柯创电子材料有限公司 | The manufacture method of metallized film capacitor |
| CN112366085A (en) * | 2020-10-13 | 2021-02-12 | 浙江赛宁电子工贸有限公司 | Thin film capacitor and production process thereof |
-
2021
- 2021-12-29 CN CN202111640932.9A patent/CN114334454A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201181645Y (en) * | 2008-04-21 | 2009-01-14 | 安徽源光电器有限公司 | High temperature capacitor |
| CN101916660A (en) * | 2010-07-12 | 2010-12-15 | 无锡宏广电容器有限公司 | Metalized film capacitor |
| JP2013197430A (en) * | 2012-03-22 | 2013-09-30 | Hitachi Aic Inc | Film capacitor |
| CN203444983U (en) * | 2013-05-27 | 2014-02-19 | 上海皓月电气有限公司 | Highly reliable motor starting/intermittent operation capacitor |
| CN104143436A (en) * | 2014-07-22 | 2014-11-12 | 安徽鑫阳电子有限公司 | Point-contact-typed explosion-proof capacitor for conductive column |
| CN104465092A (en) * | 2014-12-11 | 2015-03-25 | 铜陵市启动电子制造有限责任公司 | Manufacturing method for anti-electromagnetic interference thin-film capacitor |
| CN106128759A (en) * | 2016-08-11 | 2016-11-16 | 苏州柯创电子材料有限公司 | The manufacture method of metallized film capacitor |
| CN112366085A (en) * | 2020-10-13 | 2021-02-12 | 浙江赛宁电子工贸有限公司 | Thin film capacitor and production process thereof |
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Application publication date: 20220412 |