CN108417392A - A kind of X2 safety capacitance and its preparation process inhibiting breakthrough performance based on cross-line - Google Patents
A kind of X2 safety capacitance and its preparation process inhibiting breakthrough performance based on cross-line Download PDFInfo
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- CN108417392A CN108417392A CN201810445591.1A CN201810445591A CN108417392A CN 108417392 A CN108417392 A CN 108417392A CN 201810445591 A CN201810445591 A CN 201810445591A CN 108417392 A CN108417392 A CN 108417392A
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/14—Protection against electric or thermal overload
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
- H01G4/236—Terminals leading through the housing, i.e. lead-through
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/32—Wound capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention discloses a kind of X2 safety capacitances inhibiting breakthrough performance based on cross-line, belong to capacitance field, its key points of the technical solution are that including capacitance main body, positive energization bar and cathode energization bar, positive energization bar and cathode energization bar be fixedly mounted on the lower end of capacitance main body.Safety capacitance made of zinc-aluminium metallized polypropylene film is thickeied using edge to work in two-termial line between being connected directly across two line of power line, the structure constituted based on two-sided double-deck metallized polypropylene film lamination winding is internal series-connection structure, to thoroughly solve domestic and international research and development institution so far all insurmountable metallized film capacitor long-term work condition easily occur capacitance it is overproof or lose and self-healing after can cause capacity to reduce caused by capacity stability difference and because layer of metallized film is relatively thin carry weaker two big technical barrier of high current ability, effective control and the critical process process and technology for eliminating metallized film interlayer air and improvement encapsulation.
Description
Technical field
The present invention relates to capacitance preparation field, more particularly to it is a kind of based on cross-line inhibit breakthrough performance X2 safety capacitance and
Its preparation process.
Background technology
Metallized film X2 safety capacitances are to be connected directly across both ends between two line of power line (L-N), apply and are filtered in power supply
In wave device, effect is filtering AC signal, inhibits DM EMI, and direct current signal is made to be transmitted to using in circuit, reduce electric appliance,
The electromagnetic interference that electronic equipment or other interference sources generate, is widely used in household electrical appliance, Medical Devices, industrial control system
Electronic circuit in, but largely select X2 safety capacitive process in, often will appear capacitance fall-off and loss tangent tg δ
Increase and degenerative the case where failing so that capacitive property is no longer reliable, causes electronic product that cannot reach inhibition powered electromagnetic
The effect of interference is stopped, and product function is entirely ineffective, brings larger puzzlement to terminal user, and to electronic product quality
It throws doubt upon.
Authorization Notice No. is that the Chinese patent of CN106531439A discloses a kind of capacitance, the core coating installation in the present apparatus
In fixing sleeve, under genuine state, the setting of core packet is welded and fixed, when binding post in upper position by binding post completion
When exposed part fractures, core packet can upwards be pushed up by way of rotary screw, binding post is extended at this time, conveniently again
It is secondary to be subjected to, spoilage is reduced, especially to the higher capacitance of departmental cost, this kind of mode can greatly reduce damage
Rate.
Authorization Notice No. is that the Chinese patent of CN102201408A discloses a kind of capacitance comprising is formed on first layer
Spaced the first conductive part and the second conductive part, the spaced third conductive part and the 4th being formed on the second layer
Conductive part, spaced the 5th conductive part and the 6th conductive part being formed in third layer；Wherein it is located at the third of middle layer
The thickness of conductive part and the 4th conductive part is very thick can to form prodigious relative area, generate prodigious capacitance on the intermediate layer,
Capacitance is greatly increased, to improve capacitance density on unit wafer area.
But existing capacitance often will appear capacitance fall-off and loss tangent tg δ increase and the feelings of degenerative failure
Condition so that capacitive property is no longer reliable, causes electronic product that cannot achieve the effect that inhibit powered electromagnetic interference or be stopped,
Product function is entirely ineffective, brings larger puzzlement to terminal user, and throw doubt upon to electronic product quality, and heat extraction effect is not
It is good, temperature detection effect cannot be reached to the capacitance, and packaging effect is poor.
Invention content
In view of the deficienciess of the prior art, the object of the present invention is to provide a kind of X2 inhibiting breakthrough performance based on cross-line
Safety capacitance and its preparation process thicken safety capacitance made of zinc-aluminium metallized polypropylene film using edge and are being directly connected across
It works in two-termial line between two line of power line, capacity and loss are almost unchanged, are based on two-sided double-deck metallized polypropylene
The structure that pellicular cascade winding is constituted is internal series-connection structure, can not all be solved so far to thoroughly solve domestic and international research and development institution
Metallized film capacitor certainly long-term work condition easily occur capacitance it is overproof or lose and self-healing after can lead to capacity
Capacity stability caused by reducing is poor and carries weaker two big technical barrier of high current ability because layer of metallized film is relatively thin, effectively
Control and eliminate metallized film interlayer air and improve encapsulation critical process process and technology.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of X2 safety capacitances inhibiting breakthrough performance based on cross-line, including capacitance main body, positive energization bar and cathode are logical
Electric pole, positive energization bar and cathode energization bar are fixedly mounted on the lower end of capacitance main body, and the front of capacitance main body is closely fitted with
The inside center of nameplate, capacitance main body is installed with capacitor core, and capacitor core electrically connects close to one end of positive energization bar
It is connected to lead, and capacitor core, positive energization bar, the series connection of cathode energization bar, the upper end of capacitance body interior is installed with survey
Warm system, capacitance main body have energization bar reinforcing layer, energization bar reinforcing layer to protrude capacitance master close to one end welding of positive energization bar
The lower surface of body, capacitor core are plugged with clamping plate close to the inside of positive energization bar, and the upper end of capacitor core is closely fitted with thin
The lower end of metal positive pole, capacitor core is closely fitted with thin metal negative electrode, and the outer wall of capacitor core is wound with the outer core of annular,
The outer wall of the outer core of annular is closely fitted with insulating layer, the inside of capacitor core be installed with double-sided metalized polypropylene film a with
Double-sided metalized polypropylene film b.
Through the above technical solutions, positive energization bar and cathode energization bar are effectively fixed peace by energization bar reinforcing layer
Mounted in the lower end of capacitance main body, to increase the stability of capacitance work, avoids space movement and twist off phenomenon.
Further, respectively vapor deposition has thin metal layer as electricity on double-sided metalized polypropylene film a (404) medium two sides surface layer
Pole forms it into two-sided metallization polypropylene film, and zinc layers and aluminium layer is deposited successively respectively on poly- third film two sides, makes Bao Jin
Category layer is zinc-aluminium composite layer, it is preferably special with the good electricity of galvanized metal film fully to have merged metallized film adhesive force of aluminizing
The respective advantage of property parameter, and corresponding two edges of metal layer gradually thicken.
Through the above technical solutions, passing through AM aluminum metallization, zinc composition metal successively on double-sided metalized polypropylene film a media
Full film effectively raises the 10-20% for changing capacitance work field strength, to be effectively increased double-sided metalized polypropylene film a
The stability of energization avoids capacitance error and significant change occurs.
Further, respectively one layer of thin metal of vapor deposition increases metal spraying as electrode on the two sides double-sided metalized polypropylene film a surface layer
The contact area of layer and double-sided metalized polypropylene film a metal layers.
Through the above technical solutions, by the two sides double-sided metalized polypropylene film a surface layer, respectively one layer of thin metal of vapor deposition is used as
Electrode effectively enhances the adhesion strength between gilding layer and double-sided metalized polypropylene film a metal layers and interpenetrates power,
Gilding layer and metallized film coating contact area are increased, contact resistance is reduced, substantially increases the through-flow and anti-of capacitance
Surge capacity will not cause capacitance open circuit or capacity significantly to decline, to increase the stability of capacitance work.
Further, it is installed with poly- third in the middle part of double-sided metalized polypropylene film a and double-sided metalized polypropylene film b
Alkene light film a, makes double-sided metalized polypropylene film a and double-sided metalized polypropylene film b be separated, double-sided metalized polypropylene film
The lower end of b is installed with polypropylene light film b.
Through the above technical solutions, passing through the effective of double-sided metalized polypropylene film a and double-sided metalized polypropylene film b
In conjunction with effective to form two groups of concatenated resistance, to make, capacitance self-healing performance loss is low, warm liter is low, partial discharge performance
It is excellent.Further, the upper end of normal temperature epoxy resin seal outer layer is through being connected with venthole, make the inside of capacitance main body with it is outer
Portion connects, and trepanning is smaller and smaller from inside to outside for venthole.
Through the above technical solutions, effectively so that the heat of heat dissipation is discharged capacitor core work by venthole,
Since trepanning is smaller and smaller from inside to outside for venthole, when capacitance is powered, at this point, the temperature outside capacitor core is increasingly
Height makes to be expanded outside capacitor core, to which internal heat and air are dispersed into outside by venthole.
Further, the lower surface of thin capacitor core is electroplate with gilding layer, and gilding layer, and metal spraying material fusing point is low.
Through the above technical solutions, effectively increasing capacitance by gilding layer to the stability put, since metal spraying material is molten
Point is low, effective to ensure metal spraying particle uniformly good infiltration pole plate, avoid the edge of metallized film shunk because of fever and
Gold spraying material aoxidizes in spraying process, obtains higher metal spraying quality.
Further, the both ends of capacitor core and the outer wall of lead are closely fitted with Welding Sn-Zn material, and Welding Sn-Zn material is uniform
It is applied to the both ends of capacitor core.
Through the above technical solutions, effectively reducing gilding layer and double-sided metalized polypropylene film b's by Welding Sn-Zn material
Contact resistance improves the resistance to pressure of the capacitance, and short circuit will not be caused under the impact of instant high-voltage high current, is effectively avoided
Arcing punch-through, improves the reliability and service life of capacitance.
Further, the outer wall welding of capacitance main body has normal temperature epoxy resin seal outer layer, and clamping plate is close to normal temperature epoxy tree
One end of fat sealable outer is filled with poly- third thin film dielectrics.
Through the above technical solutions, effectively improve encapsulation by epoxy resin sealable outer, by between film layer air with
External environment is preferably isolated, and the service life of capacitance can be extended, and when capacitance works in hot and humid environment, capacitance declines
Before the speed subtracted far smaller than improves, external environment moisture content is effectively prevented to invade, reduce air ionization, to inhibiting capacitance
Decaying have preferable effect.
Further, positive energization bar includes tin-coated copper and steel wire, and tin-coated copper is wound on the outer wall of steel wire, and tin-coated copper is in
" helical form ", the one end of tin-coated copper far from steel wire are installed with anchor tip.
Through the above technical solutions, by " helical form " tin-coated copper wound on the outer wall of steel wire, the anode is effectively improved
The self-healing property of energization bar keeps positive energization bar quality loss small, and insulation resistance is high, and safety and inhibition interference characteristic are strong, can hold
Carry larger current, hence it is evident that improve the electromagnetism interference performance of product, can be connected directly across in fiery ground wire.
Further, temp measuring system is installed with temperature sensing board close to one end of capacitor core, and the lower end of temperature sensing board is in
" multi-cambered surface shape ".
Through the above technical solutions, effectively the temperature on the outside of capacitor core is tested by temperature sensing board, work as temperature-sensitive
When plate is close to capacitor core, at this point, the lower end due to temperature sensing board is in " multi-cambered surface shape ", to increase temperature sensing board and capacitance core
The contact area of son, and then it is effectively increased the stability of capacitor core temperature test.
Further, temperature-sensitive circuit is installed in the middle part of temp measuring system, temp measuring system is close close to normal temperature epoxy resin
One end of envelope outer layer is installed with temperature display.
Through the above technical solutions, by temperature-sensitive circuit effectively by the temperature sensing measured by temperature sensing board to temperature display
Screen is shown, to allow user explicitly to see, and then reaches convenient effect.
This kind inhibits the X2 safety capacitance of breakthrough performance and its preparation process, technology as follows based on cross-line：
S1. it is deposited：Using high temperature resistant, high frequency polypropylene film material as medium, on the two sides of polypropylene film medium
Respectively one layer of thin metal of vapor deposition forms two-sided metallization polypropylene film as electrode on surface layer, and distinguishes successively on poly- third film two sides
Zinc layers and aluminium layer is deposited, it is zinc-aluminium composite layer to make thin metal layer, and this special structure has fully merged metallized film of aluminizing
Respective advantage of the adhesive force preferably with galvanized metal film good electrical parameter, than the work of traditional metallization thin film capacitor
Make field strength and improves 10-20%.Electric capacitance change is minimum, after self-healing breakdown occurs in a subrange of metallized film medium
Be restored to electrical property before breakdown by the light of nature immediately, and the loss late of capacitor does not exceed 50PPM generally, the loss of capacity and
The increase of loss almost can be ignored；
S2. capacitor core is made：It is wound using double-layer and double-side metallized polypropylene film lamination, double-sided metalized polypropylene film
It is separated with polypropylene light film a (405) between a (404) and double-sided metalized polypropylene film b (406), bottom is further added by a strata third
Alkene light film a (405), two metalized films mutually stagger Ju Li ⊿ L , ⊿ L controls between 0.8~1mm when winding, winding tension
For：
F (tension)=K (coefficient of tension 0.010~0.012) × B (film is wide) × H (film thickness)；
S3. hot pressing polymerize：Manufactured capacitor core in step S2 is subjected to hot pressing by capacitance hot press, first by temperature control
System is at 70 DEG C -80 DEG C, and hot pressing time is 20-30 seconds, pressure 3.5-3.8kg, then temperature is adjusted to 90-100 degrees Celsius, heat
It is 70-100 seconds to press the time, pressure 3.8-4.2kg；
S4. it encapsulates：Capacitor core after thermocompression forming in step S3 is subjected to outer enclosure by capacitance packing machine；
S5. metal spraying：The both ends end face of capacitor core (4) after being wrapped up in step S4 is sprayed to the Welding Sn-Zn material of low melting point
(4031), with the end face distance of capacitor core (4) with to carry out metal spraying when 160mm, the coating thickness of single stroke exists metal spraying rifle
55-65μm；
S6. it welds：Tin coating on capacitor body end face metal spraying and lead is blended to draw electrode for capacitors,
When welding, mechanical pressure F is 0.3-0.5kg；
S7. cure：The capacitor core (4) completed in step S6 is subjected to plug shell, then epoxy resin is used to carry out to it
Embedding is cured using acid anhydride type curing agent, and at 90 DEG C -100 DEG C, the time is 9-9.5 hours for temperature control.
In conclusion the invention has the advantages that：
1, safety capacitance made of zinc-aluminium metallized polypropylene film is thickeied using edge and is being connected directly across power line two
It works in two-termial line between line, by the two sides double-sided metalized polypropylene film a surface layer, respectively one layer of thin metal of vapor deposition is used as electrode,
It effectively enhances the adhesion strength between gilding layer and double-sided metalized polypropylene film a metal layers and interpenetrates power, increase
Gilding layer and metallized film coating contact area, reduce contact resistance, substantially increase the through-flow and antisurge of capacitance
Ability will not cause capacitance open circuit or capacity significantly to decline, to increase the stability of capacitance work；
2, being effectively combined by double-sided metalized polypropylene film a and double-sided metalized polypropylene film b, it is effective to form
Two groups of concatenated resistance, to make, capacitance self-healing performance loss is low, warm liter is low, partial discharge performance is excellent；
3, by " helical form " tin-coated copper wound on the outer wall of steel wire, the self-healing property of the anode energization bar is effectively improved,
Keep positive energization bar quality loss small, insulation resistance is high, and safety and inhibition interference characteristic are strong, can carry larger current, hence it is evident that
The electromagnetism interference performance of product is improved, can be connected directly across in fiery ground wire；
4, effective to improve by AM aluminum metallization, the full film of zinc composition metalization successively on double-sided metalized polypropylene film a media
The 10-20% for changing capacitance work field strength keeps away to be effectively increased the stability that double-sided metalized polypropylene film a is powered
Capacitance error is exempted from and significant change occurs；
5, encapsulation is effectively improved by epoxy resin sealable outer, by air and the external environment between film layer preferably every
From the service life of capacitance can be extended, and when capacitance works in hot and humid environment, the speed of capacitance fade is far smaller than
Before improvement, external environment moisture content is effectively prevented to invade, reduce air ionization, to inhibiting the decaying of capacitance to have preferable work
With；
6, the stability for effectively increasing capacitance to point by gilding layer effectively ensures since metal spraying material fusing point is low
The uniform good infiltration pole plate of metal spraying particle, avoids that the edge of metallized film is shunk because of fever and gold spraying material is in spraying process
Middle oxidation obtains higher metal spraying quality.
Description of the drawings
Fig. 1 is positive structure diagram of the present invention；
Fig. 2 is capacitance body interior structural schematic diagram of the present invention；
Fig. 3 is the positive energization bar external structure schematic diagram of the present invention；
Fig. 4 is capacitor core structural schematic diagram of the present invention；
Fig. 5 is capacitor core internal structure schematic diagram of the present invention；
Fig. 6 is temp measuring system structural schematic diagram of the present invention.
In figure, 1, capacitance main body；101, nameplate；102, venthole；103, lead；2, positive energization bar；201, cathode is logical
Electric pole；202, tin-coated copper；203, steel wire；204, anchor tip；3, normal temperature epoxy resin seal outer layer；301, lead to strutting of pole
Layer；4, capacitor core；401, the outer core of annular；4011, insulating layer；402, thin metal positive pole；4021, thin metal negative electrode；
403, gilding layer；4031, Welding Sn-Zn material；404, double-sided metalized polypropylene film a；405, polypropylene light film a；406, double-sided metal
Change polypropylene screen b；407, polypropylene light film b；5, clamping plate；501, poly- third thin film dielectrics；6, temp measuring system；601, temperature display
Screen；602, temperature-sensitive circuit；603, temperature sensing board.
Specific implementation mode
A kind of X2 safety capacitance and its preparation process inhibiting breakthrough performance based on cross-line, as shown in Figure 1, it is a kind of based on across
Line inhibits the X2 safety capacitance and its preparation process of breakthrough performance, including capacitance main body 1, positive energization bar 2 and cathode energization bar
201, positive energization bar 2 and cathode energization bar 201 are fixedly mounted on the lower end of capacitance main body 1, the close patch in front of capacitance main body 1
Conjunction has nameplate 101.
In embodiment, as shown in Fig. 2, the outer wall welding of capacitance main body 1 has normal temperature epoxy resin seal outer layer 3, pass through
Epoxy resin sealable outer 3 effectively improves encapsulation, and the air between film layer is preferably isolated with external environment, can extend electricity
The service life of appearance before the speed far smaller than improvement of capacitance fade, is effectively hindered when capacitance works in hot and humid environment
The intrusion of external environment moisture content is stopped, has reduced air ionization, to inhibiting the decaying of capacitance to have preferable effect, capacitance main body 1
Inside center be installed with capacitor core 4, capacitor core 4 is electrically connected leaded close to one end of positive energization bar 2
103, so that capacitor core 4, positive energization bar 2, cathode energization bar 201 is connected in series with, the upper end inside capacitance main body 1 is fixedly mounted
There are temp measuring system 6, capacitance main body 1 to have energization bar reinforcing layer 301, energization bar reinforcing layer close to one end welding of positive energization bar 2
301 protrude the lower surface of capacitance main body 1, by energization bar reinforcing layer 301 effectively by positive energization bar 2 and cathode energization bar
201 are fixedly mounted on the lower end of capacitance main body 1, to increase the stability of capacitance work, avoid space movement and twist off
Phenomenon, capacitor core 4 are plugged with clamping plate 5 close to the inside of positive energization bar 2, and clamping plate 5 is close to normal temperature epoxy resin seal outer layer 3
One end be filled with poly- third thin film dielectrics 501, the upper end of normal temperature epoxy resin seal outer layer 3 through being connected with venthole 102, and
The inside and outside for making capacitance main body 1 connect, and effectively capacitor core 4, which is worked, by venthole 102 makes the heat of heat dissipation
It is discharged, since trepanning is smaller and smaller from inside to outside for venthole 102, when capacitance is powered, at this point, outside capacitor core 4
The temperature in portion is higher and higher, makes to be expanded outside capacitor core 4, to which internal heat and air are passed through venthole
102 are dispersed into outside.
In embodiment, as shown in figure 3, positive energization bar 2 includes tin-coated copper 202 and steel wire 203, tin-coated copper 202 is wound
In the outer wall of steel wire 203, and tin-coated copper 202 is in " helical form ", and the one end of tin-coated copper 202 far from steel wire 203 is installed with
Determine connector 204, by " helical form " tin-coated copper 202 wound on the outer wall of steel wire 203, effectively improves the anode energization bar 2
Self-healing property keeps positive 2 quality loss of energization bar small, and insulation resistance is high, and safety and inhibition interference characteristic are strong, can carry larger electricity
Stream, hence it is evident that improve the electromagnetism interference performance of product, can be connected directly across in fiery ground wire.
In embodiment, as shown in figure 4, the upper end of capacitor core 4 is closely fitted with thin metal positive pole 402, capacitance core
The lower end of son 4 is closely fitted with thin metal negative electrode 4021, and the outer wall of capacitor core 4 is wound with the outer core 401 of annular, the outer core of annular
401 outer wall is closely fitted with insulating layer 4011, and the lower surface of thin metal negative electrode 4021 is electroplate with gilding layer 403, passes through spray
Layer gold 403 effectively increases capacitance to the stability of point, and since metal spraying material fusing point is low, effective guarantee metal spraying particle is uniformly good
Good infiltration pole plate, avoids that the edge of metallized film is shunk because of fever and gold spraying material aoxidizes in spraying process, obtain compared with
The both ends of high metal spraying quality, capacitor core 4 are closely fitted with Welding Sn-Zn material 4031, are effectively reduced by Welding Sn-Zn material 4031
The contact resistance of gilding layer 403 and double-sided metalized polypropylene film b406 improves the resistance to pressure of the capacitance, in instant high-voltage
Short circuit will not be caused under the impact of high current, effectively prevents arcing punch-through, improve the reliability of capacitance and use the longevity
Life.
In embodiment, as shown in figure 5, the inside of capacitor core 4 is installed with double-sided metalized polypropylene film a404
With double-sided metalized polypropylene film b406, the middle part of double-sided metalized polypropylene film a404 and double-sided metalized polypropylene film b406
It is installed with polypropylene light film a405, double-sided metalized polypropylene film a404 and double-sided metalized polypropylene film b406 is made to carry out
Separate, by being effectively combined for double-sided metalized polypropylene film a404 and double-sided metalized polypropylene film b406, effective group
At two groups of concatenated resistance, to make, capacitance self-healing performance loss is low, warm liter is low, partial discharge performance is excellent, double-sided metal
The lower end for changing polypropylene screen b406 is installed with polypropylene light film b407, on double-sided metalized polypropylene film a404 media successively
AM aluminum metallization, the full film of zinc composition metalization pass through AM aluminum metallization, zinc composition metal successively on double-sided metalized polypropylene film a404 media
Change full film, the 10-20% for changing capacitance work field strength is effectively raised, to be effectively increased double-sided metalized polypropylene film
The stability that a404 is powered avoids capacitance error and significant change, the two sides double-sided metalized polypropylene film a404 surface layer occurs
Respectively one layer of thin metal of vapor deposition effectively enhances gilding layer 403 and double-sided metalized polypropylene film a404 metal layers as electrode
Between adhesion strength and interpenetrate power, increase gilding layer 403 and metallized film coating contact area, reduce contact
Resistance substantially increases the through-flow and Surge handling capability of capacitance, capacitance open circuit or capacity will not be caused significantly to decline, to increase
The stability for adding the capacitance to work.
In embodiment, as shown in fig. 6, temp measuring system 6 is installed with temperature sensing board 603 close to one end of capacitor core 4,
And the lower end of temperature sensing board 603 is in " multi-cambered surface shape ", is effectively carried out the temperature in 4 outside of capacitor core by temperature sensing board 603
Test, when temperature sensing board 603 is close to capacitor core 4, at this point, the lower end due to temperature sensing board 603 is in " multi-cambered surface shape ", to increase
Add the contact area of temperature sensing board 603 and capacitor core 4, and then be effectively increased the stability of 4 temperature test of capacitor core,
The middle part of temp measuring system 6 is installed with temperature-sensitive circuit 602, and temp measuring system 6 is close to one end of normal temperature epoxy resin seal outer layer 3
It is installed with temperature display 601, by temperature-sensitive circuit 602 effectively by the temperature sensing measured by temperature sensing board 603 to temperature
Degree display screen 601 is shown, to allow user explicitly to see, and then reaches convenient effect.
This kind inhibits the X2 safety capacitance of breakthrough performance and its preparation process, technology as follows based on cross-line：
S1. it is deposited：Using high temperature resistant, high frequency polypropylene film material as medium, on the two sides of polypropylene film medium
Respectively one layer of thin metal of vapor deposition forms two-sided metallization polypropylene film as electrode on surface layer, and distinguishes successively on poly- third film two sides
Zinc layers and aluminium layer is deposited, it is zinc-aluminium composite layer to make thin metal layer, and this special structure has fully merged metallized film of aluminizing
Respective advantage of the adhesive force preferably with galvanized metal film good electrical parameter, than the work of traditional metallization thin film capacitor
Make field strength and improves 10-20%.Electric capacitance change is minimum, after self-healing breakdown occurs in a subrange of metallized film medium
Be restored to electrical property before breakdown by the light of nature immediately, and the loss late of capacitor does not exceed 50PPM generally, the loss of capacity and
The increase of loss almost can be ignored；
S2. capacitor core is made：It is wound using double-layer and double-side metallized polypropylene film lamination, double-sided metalized polypropylene film
It is separated with polypropylene light film a (405) between a (404) and double-sided metalized polypropylene film b (406), bottom is further added by a strata third
Alkene light film a (405), two metalized films mutually stagger Ju Li ⊿ L , ⊿ L controls between 0.8~1mm when winding, be staggered properly away from
More preferable from effect after winding, very neat and each layer of tension uniform force when winding, when winding, winding tension needs perseverance
Fixed, crossing conference keeps metallized film generation longitudinal stretching thinning, is easy breakdown failure.Winding tension is too small, can make capacitor core
Air gap increases between sub- double-layer films, easy tos produce shelf depreciation or breakdown, by experimental analysis, calculates best suitable
Power is adjusted, and winding tension is：F (tension)=K (coefficient of tension 0.010~0.012) × B (film is wide) × H (film thickness), uses simultaneously
Contactless magnetic induction potentiometer is detected as tension feedback, and control unreels output torque and the direction of DC servo motor, makes
The capacitor body hardness of constant tension in entire winding process, winding is high, and no wrinkling, interlayer residual air is small, does not allow
Self-healing breakdown failure easily occurs；
S3. hot pressing polymerize：Manufactured capacitor core in step S2 is subjected to hot pressing by capacitance hot press, first by temperature control
System is at 70 DEG C -80 DEG C, and hot pressing time is 20-30 seconds, pressure 3.5-3.8kg, then temperature is adjusted to 90-100 degrees Celsius, heat
It is 70-100 seconds to press the time, pressure 3.8-4.2kg；
Hot pressing polymerization technique is the physical property using metallized polypropylene film heat shrinkable, during heating metal
Change polypropylene and uniform thermal contraction is longitudinally occurring, the air that will remain under a certain pressure between dielectric layer squeezes out, evaporation
It is adsorbed on the moisture of film surface, improves the tight ness rating of capacitor element, the stability of capacitance is made to be improved.Pass through analysis
It is obtained with experiment, in 100 DEG C of temperature polymerizations below longitudinal contraction only occurs for polypropylene screen, at 120 DEG C, that is, generates longitudinal direction,
Also cross-direction shrinkage is generated.In thermocompression forming in manufacturing capacitor, only want to generate longitudinal contraction.Fuse is more under pressure
Closely, it is conducive to squeeze out the air of interlayer, and is not intended to generate contraction in lateral aspects, end face otherwise can be caused because shrinking 20
Metal spraying contact fastness is bad, and contact resistance is made to increase, and loss tg δ increase.The thus best hot pressing temperature of polypropylene metallized film
Degree should cannot be more than 120 DEG C at 100 DEG C or less, and by experimental analysis, hot pressing polymerization temperature is set as (95 ± 5) DEG C, is fitted
Locality increases pressure and time, and capacitor metalized polar plate area is sufficiently stable, and the variation of tg δ has clear improvement, and capacitor holds
Amount will not decline.
S4. it encapsulates：Capacitor core after thermocompression forming in step S3 is subjected to outer enclosure by capacitance packing machine；
S5. metal spraying：The both ends end face of capacitor core (4) after being wrapped up in step S4 is sprayed to the Welding Sn-Zn material of low melting point
(4031), the end face distance of metal spraying rifle and capacitor core (4) with to carry out metal spraying when 160mm, when than traditional distance being 200mm
Metal spraying has apparent superiority, can withstand 500V10 charge and discharge, 10kHz and 100kHz loss tangents are protected substantially
Constant or only small variation is held, has achieved the purpose that stabilising condenser is lost.
In order to which extraction electrode just must spray metal layer at the both ends of metallic film capacitor fuse, thus capacitor
Tg δ have with metal spraying technique directly to be contacted.The quality of metal spraying quality determines the size of capacitor metal part contact resistance,
It is the contact loss principal element for influencing capacitor.To ensure metal spraying quality, increases metallized film electrode and engaged with gilding layer
Intensity reduces influence of the contact resistance to loss, selects low melting point metal spraying material, ensures metal spraying particle uniformly good infiltration pole
Plate, avoids that the edge of metallized film is shunk because of fever and gold spraying material aoxidizes in spraying process, obtains higher metal spraying matter
Amount, therefore the coating thickness of single stroke is at 55-65 μm.
S6. it welds：Welding is to melt capacitor core using the instantaneous high heat of low-voltage, the generation of high current short circuit dischange
Tin coating on sub- end face metal spraying and lead makes the two be merged, to draw electrode for capacitors.Tests prove that not welding
After charge and discharge test for several times, loss will not increase the fuse connect, and carry out charge and discharge test damage for the fuse after welding
It takes and changes, i.e., as welding condition controls improper, the pernicious increase of welding fuse loss or increase after charge and discharge test
It is extremely unqualified.Therefore, welded condition control is one of the key factor reduced with the loss of stable metal thin film capacitor, experiment
Show that mechanical pressure F is 0.3-0.5kg, ensure that welding quality, obtains capacitor core body of good performance in welding；
S7. cure：The capacitor core (4) completed in step S6 is subjected to plug shell, then epoxy resin is used to carry out to it
Embedding, using the control of acid anhydride type curing agent temperature at 90 DEG C -100 DEG C, the time is to be cured for 9-9.5 hours, capacitor arrangement
Densification, hardness is higher, there is preferable humidity resistance.Improve the capacitor after encapsulation to work in hot and humid environment, capacitor
Before the speed of decaying far smaller than improves, Shui parts of intrusions of external environment are effectively prevented, air ionization are reduced, to suppression capacitor
The decaying of capacity has preferable effect.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this
It is all protected by Patent Law in the right of invention.
Claims (9)
1. a kind of X2 safety capacitances inhibiting breakthrough performance based on cross-line, including capacitance main body (1), positive energization bar (2) and bear
Pole energization bar (201), positive energization bar (2) and cathode energization bar (201) are fixedly mounted on the lower end of capacitance main body (1), special
Sign is：The front of capacitance main body (1) is closely fitted with nameplate (101), and the inside center of capacitance main body (1) is installed with capacitance
Fuse (4), capacitor core (4) are electrically connected leaded (103) close to one end of positive energization bar (2), and capacitor core (4),
Positive energization bar (2), cathode energization bar (201) series connection, capacitance main body (1) have logical close to one end welding of positive energization bar (2)
Strutting of pole layer (301), the lower surface of the prominent capacitance main body (1) of energization bar reinforcing layer (301), capacitor core (4) is close to anode
The inside of energization bar (2) is plugged with clamping plate (5), and the upper end of capacitor core (4) is closely fitted with thin metal positive pole (402), electricity
The lower end for holding fuse (4) is closely fitted with thin metal negative electrode (4021), and the outer wall of capacitor core (4) is wound with the outer core of annular
(401), the outer wall of the outer core (401) of annular is closely fitted with insulating layer (4011), and the inside of capacitor core (4) is installed with pair
Face zinc-aluminium composition metal polypropylene screen a (404) and double-sided metalized polypropylene film b (406).
2. a kind of X2 safety capacitances inhibiting breakthrough performance based on cross-line according to claim 1, it is characterized in that：Two-sided gold
Respectively vapor deposition has thin metal layer as electrode on categoryization polypropylene screen a (404) medium two sides surface layer, forms it into two-sided metallization poly- third
Alkene film, and zinc layers and aluminium layer is deposited successively respectively on poly- third film two sides, make thin metal layer for zinc-aluminium composite layer, and metal layer
Corresponding two edges gradually thicken.
3. a kind of X2 safety capacitances inhibiting breakthrough performance based on cross-line according to claim 1, it is characterized in that：Two-sided gold
It is installed with polypropylene light film a (405) in the middle part of categoryization polypropylene screen a (404) and double-sided metalized polypropylene film b (406),
Double-sided metalized polypropylene film a (404) and double-sided metalized polypropylene film b (406) is set to be separated, two-sided metallization polypropylene
The lower end of film b (406) is installed with polypropylene light film b (407).
4. a kind of X2 safety capacitances inhibiting breakthrough performance based on cross-line according to claim 1, it is characterized in that：Room temperature ring
The upper end of oxygen resin seal outer layer (3), which is run through, is connected with venthole (102), and the inside of capacitance main body (1) is made mutually to be passed through with outside
It is logical, and trepanning is smaller and smaller from inside to outside for venthole (102).
5. a kind of X2 safety capacitances inhibiting breakthrough performance based on cross-line according to claim 1, it is characterized in that：Capacitance core
The lower surface of sub (4) is electroplate with gilding layer (403), and gilding layer (403) fusing point is low.
6. a kind of X2 safety capacitances inhibiting breakthrough performance based on cross-line according to claim 1, it is characterized in that：Capacitance core
The both ends of sub (4) and the outer wall of lead (103) are closely fitted with Welding Sn-Zn material (4031), and Welding Sn-Zn material (4031) is uniformly smeared
Both ends in capacitor core (4).
7. a kind of X2 safety capacitances inhibiting breakthrough performance based on cross-line according to claim 1, it is characterized in that：Capacitance master
The outer wall welding of body (1) has normal temperature epoxy resin seal outer layer (3), and clamping plate (5) is close to normal temperature epoxy resin seal outer layer (3)
One end is filled with poly- third thin film dielectrics (501).
8. a kind of X2 safety capacitances inhibiting breakthrough performance based on cross-line according to claim 1, it is characterized in that：Anode is logical
Electric pole (2) includes tin-coated copper (202) and steel wire (203), and tin-coated copper (202) is wound on the outer wall of steel wire (203), and tin-coated copper
(202) it is in " helical form ", the one end of tin-coated copper (202) far from steel wire (203) is installed with anchor tip (204).
9. a kind of preparation process of X2 safety capacitance according to claim 1 is based on any rights of the claims 1-8
It is required that a kind of X2 safety capacitances inhibiting breakthrough performance based on cross-line, it is characterized in that：Steps are as follows：
S1. it is deposited：Using high temperature resistant, high frequency polypropylene film material as medium, on the two sides surface layer of polypropylene film medium
Respectively one layer of thin metal of vapor deposition forms two-sided metallization polypropylene film as electrode, and is deposited successively respectively on poly- third film two sides
Zinc layers and aluminium layer, it is zinc-aluminium composite layer to make thin metal layer；
S2. capacitor core is made：It is wound using double-layer and double-side metallized polypropylene film lamination, double-sided metalized polypropylene film a
(404) it is separated with polypropylene light film a (405) between double-sided metalized polypropylene film b (406), bottom is further added by a strata third
Alkene light film a (405), two metalized films mutually stagger Ju Li ⊿ L , ⊿ L controls between 0.8~1mm when winding, winding tension
For：
F (tension)=K (coefficient of tension 0.010~0.012) × B (film is wide) × H (film thickness)；
S3. hot pressing polymerize：Manufactured capacitor core in step S2 is subjected to hot pressing by capacitance hot press, first controls temperature
70 DEG C -80 DEG C, hot pressing time is 20-30 seconds, pressure 3.5-3.8kg, then temperature is adjusted to 90-100 degrees Celsius, when hot pressing
Between be 70-100 seconds, pressure 3.8-4.2kg；
S4. it encapsulates：Capacitor core after thermocompression forming in step S3 is subjected to outer enclosure by capacitance packing machine；
S5. metal spraying：The both ends end face of capacitor core (4) after being wrapped up in step S4 is sprayed to the Welding Sn-Zn material of low melting point
(4031), with the end face distance of capacitor core (4) with to carry out metal spraying when 160mm, the coating thickness of single stroke exists metal spraying rifle
55-65μm；
S6. it welds：Tin coating on capacitor body end face metal spraying and lead is blended to draw electrode for capacitors, is being welded
When, mechanical pressure F is 0.3-0.5kg；
S7. cure：The capacitor core (4) completed in step S6 is subjected to plug shell, then uses epoxy resin to be potted it,
Cured using acid anhydride type curing agent, at 90 DEG C -100 DEG C, the time is 9-9.5 hours for temperature control.
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| CN111799092A (en) * | 2020-06-18 | 2020-10-20 | 上海置信智能电气有限公司 | Thin film capacitor and manufacturing method thereof |
| CN111856111A (en) * | 2020-06-18 | 2020-10-30 | 上海置信智能电气有限公司 | Passive electronic voltage sensor and manufacturing method thereof |
| CN113851328A (en) * | 2021-10-14 | 2021-12-28 | 浙江七星电子股份有限公司 | High-performance X2-class capacitor for suppressing power supply electromagnetic interference and processing method thereof |
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| CN208489116U (en) * | 2018-05-11 | 2019-02-12 | 长兴友畅电子有限公司 | A kind of X2 safety capacitor inhibiting breakthrough performance based on cross-line |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799092A (en) * | 2020-06-18 | 2020-10-20 | 上海置信智能电气有限公司 | Thin film capacitor and manufacturing method thereof |
| CN111856111A (en) * | 2020-06-18 | 2020-10-30 | 上海置信智能电气有限公司 | Passive electronic voltage sensor and manufacturing method thereof |
| CN113851328A (en) * | 2021-10-14 | 2021-12-28 | 浙江七星电子股份有限公司 | High-performance X2-class capacitor for suppressing power supply electromagnetic interference and processing method thereof |
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