CN207834041U - A kind of novel piezoresistor with temperature protection - Google Patents
A kind of novel piezoresistor with temperature protection Download PDFInfo
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- CN207834041U CN207834041U CN201721846713.5U CN201721846713U CN207834041U CN 207834041 U CN207834041 U CN 207834041U CN 201721846713 U CN201721846713 U CN 201721846713U CN 207834041 U CN207834041 U CN 207834041U
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Abstract
The utility model is related to a kind of piezoresistor with temperature protection or electricity/Surge Protectors; specifically a kind of novel piezoresistor with temperature protection; including voltage dependent resistor chip; weld or be crimped with the first metal electrode layer and the second metal electrode layer in the both sides of voltage dependent resistor chip; it is provided with the first metal electrode film on the outside of first metal electrode; it is provided with the second metal electrode film on the outside of second metal electrode layer; second metal electrode on piece, which is provided with, can take off pin, can take off and be connected with each other by alloy fusible metal silk between pin and the second metal electrode film.The utility model have temperature protection varistor in, in voltage dependent resistor chip side metal electrode on piece setting fever metal exit, when chip is subjected to transient state power frequency overvoltage surge, electric current, metal fever exit be surge voltage, electric current the only way which must be passed.Metal electric heating material can generate heat with most fast speed at this time, so that the alloy fusible metal silk fusing being connected between metal fever exit and Ke Tuo pins is disconnected, reach and be safely and fast detached from effect.
Description
Technical field
The utility model is related to a kind of piezoresistors with temperature protection（thermal's metal oxide
varistor,TMOV）Or electricity/Surge Protector（surge protective device,SPD）, specifically a kind of novel tool
There is the piezoresistor of temperature protection.
Background technology
Piezoresistor with temperature protection（thermal's metal oxide varistor,TMOV）Or electricity/wave
Surge protector（surge protective device,SPD）As a kind of reliable protective element, it is widely used
In low-voltage distribution system and various electronic equipments, instrument and meter, communication line.Its core devices is piezoresistor（Surging
Absorber）, belong to semiconductor devices.Major function is when the voltage in circuit is normal, and inner pressure sensitive resistance chip is in
Existing very high resistance value, is mega-ohms, can be considered insulator.When circuit is by surge voltage impact, voltage spikes, meeting
It is connected with the speed of nanosecond, becomes a conductor, to reach surge voltage to the secure line effect of releasing.But in circuit
When occurring overloading voltage when transient state is long, varistor is unaffordable, will finally form short circuit, easily causes electrical fire
Calamity.So it must be allowed to be detached from faulty line rapidly.So all with hot release unit or temperature in existing TMOV or SPD
Fuse.It is detached from the basic principle of circuit：Surge Protector（TMOV or SPD）Inner pressure sensitive resistance tile meets in circuit
When being overloaded voltage and current by transient state, adstante febre is connected in Surge Protector inner pressure sensitive resistance, and heat passes through varistor both sides
To SPD sealing-off points or the alloy fusible link of TMOV, sealing-off point scolding tin or striking point alloy are molten for conduction outward for conductive metal electrode piece
It is safely separated by fracture of wire melted by heat with institute connection line.
Either desoldering still fuses, and two kinds of disengaging modes have following several security risks and use drawback：
Phenomenon 1, in Surge Protector（TMOV or SPD）Inner pressure sensitive resistance bears transient state overload voltage and current and generates heat
When, it is intended to conduct heat by the metal electrode film of varistor when heat conducts outward.Connect sealing-off point or alloy fusible link
Conductor itself heat sinking function that will not generate heat, and have simultaneously.In patent CN203950625U【0050】It is described, striking point
Temperature when fully relying on varistor deterioration the heat that generates conduct outward.And striking point position is not necessarily just arranged and is pressing
The highest heat generating spot of quick resistance（Deterioration point）Place, so being detached from（Or fusing）Speed is by Surge Protector inner pressure sensitive resistance
Calorific value, sites of heat generation are at a distance from sealing-off point or alloy fusible link, and ambient temperature effect when breaking down is very big.
Phenomenon 2 will occur to deteriorate point if varistor bears the transient state overload voltage of long period（Weak spot）It hits
Wear phenomenon.Varistor once punctures, and overload current can all concentrate at deterioration point passing through, and causes only deterioration point hair
Heat, deterioration point with outer portion there is no（Or it is only a small amount of）Electric current passes through without fever (or a small amount of fever）.But actual conditions
In, designer can not predict the deterioration point position of voltage dependent resistor chip.Such as in patent CN203950625U, if fusing alloy
Silk position relatively far away from, will result in what heat was conducted to dispersal point or striking point in this way with varistor deterioration point position
Speed is slower or dispersal point reaches heat radiator balance and is unable to reach disengaging temperature.For another example patent CN103065750A,
Described in CN203070855U, breakdown point is preset on varistor to control breakdown point position, but belongs to intentional manufacturing defect,
It is bound to destroy the load of product and other through-flow equal aspect performances, product overall performance is generated and is endangered, is lost more than gain.
So existing SPD or TMOV is influenced by the control and selection, product design and installation environment temperature etc. of chip quality
Very big, the especially control and selection of chip quality will greatly improve chip price cost.Surge Protector product is seriously affected
Economy, reliability and safety.Simultaneously in order to striking point from varistor closer to also being set to the product of Surge Protector
Meter causes certain limitation.
Invention content
In order to solve Surge Protector（SPD or TMOV）Because temperature conduction speed is slow, fusing time is different in size, Huo Zheyin
For dispersal point（Or fusible link）Distance breakdown heat generating spot is detached from slowly and does not depart from farther out（Or it does not fuse）The problem of, this practicality is new
Type one kind especially set out can keep Surge Protector de- under the premise of not damaging any performance of varistor in Surge Protector
From point（Fusible link）The most nearby disengaging with calorific capacity（Fusing）Structure, with reach Surge Protector quickly, safe escape
Purpose the piezoresistor with temperature protection.
It is as follows for above-mentioned technique effect, the technical solution of the application in fact：
A kind of novel piezoresistor with temperature protection, it is characterised in that：Including voltage dependent resistor chip, the pressure
The both sides welding of quick resistance chip is crimped with the first metal electrode layer and the second metal electrode layer, outside first metal electrode
Side is provided with the first metal electrode film, and the second metal electrode film, second gold medal are provided on the outside of second metal electrode layer
Belong to being provided on electrode slice and can take off pin, it is described to take off between pin and the second metal electrode film through alloy fusible metal silk phase
It connects.
The alloy fusible metal silk is linear or wavelike structure；Alloy fusible metal silk is independent one section or more
Duan Binglian.
The alloy fusible metal silk is the alloy material that molten state is presented when being heated to predetermined temperature, and melting range exists
Between 100-250 degrees Celsius.Such as tin alloy or other alloy materials.
It is connected by electric heating metal exit between the alloy fusible metal silk and the metal electrode film of the side.
The electric heating metal exit is plates, threadlike body or the rectangular strip body of U-shaped, L-type or "-" type structure.
The electric heating metal exit is the various electrothermal conductor materials by current heating.As nichrome, siderochrome are closed
Gold, Aludirome or other by current heating etc. various electrothermal conductor materials, can also be non-metal carbon fiber conductor
Thermo electric material.
Lead to second pin, the first metal electricity of the other side outward with the second metal electrode on piece that can take off pin homonymy
The first pin is led on pole piece.
Surge voltage electric current pass course is：Pin → alloy fusible metal silk → electric heating metal exit → the second can be taken off
The pin of the metal electrode film of metal electrode film → voltage dependent resistor chip → first → first.Surge voltage electric current can also be sequentially reversed
Pass through.
The outer surface of the electric heating metal exit is electroplated or coats conductive electric current kelvin effect layer,.Electric current collection
Skin effect layer is specially metal layer, and electric current kelvin effect layer is act as：When product is subjected to transient state high-frequency impulse electric current, due to electricity
Adfluxion skin effect, and increase the conveyance capacity of electric heating metal exit, reduce the transient state resistance value of electrothermal alloy；Increase heating alloy
The welding performance of metal exit and other metallic conductors, that is, be electrically connected performance.
Can taking off the outside of pin in the electric heating metal exit, alloy fusible metal silk and part, to be provided with alloy fusible
Wire insulation blocking shell.It is marked with cosolvent inside alloy fusible metal silk insulation blocking shell, and is sealed by epoxy resin surface
Stifled, cosolvent plays fluxing and insulation arc extinguishing when alloy fusible metal silk fuses；Alloy fusible metal silk insulation blocking shell
For a pentahedron box body, wherein one side is provided inwardly with strip gab along open side, opening depth belongs to exit with power generation heat and is caught in
Depth matches, and opening width matches with the electric heating metal exit thickness being caught in or diameter is needed.By open card in electricity
Thermometal exit root forms shell and fixes.
It is socketed with insulation crust except the voltage dependent resistor chip and coupled all parts.Cover on entire production
Exterior insulation protective shell outside product is a pentahedron box body, and inside is marked with insulating epoxy.
Alloy fusible metal silk insulation blocking shell and insulation protection shell material matter are insulation, fire-retardant plastic cement or ceramics.
The operation principle of this structure is：
Both sides carry the voltage dependent resistor chip of metal electrode layer, weld or are crimped on the metal electrode layer of both sides to carry and draw
The metal electrode film of foot, the metal electrode film of both sides are the first metal electrode film and second electrode sheet of varistor, the first gold medal
Belong to electrode slice, two pins of the second metal electrode on piece are respectively the first pin and second pin of varistor.Wherein
One metal electrode on piece welding or crimping electric heating metal exit, are connected by alloy fusible metal silk with that can take off pin；
It can be directly connected with pin can be taken off by alloy fusible metal silk with metal electrode film.It is drawn by second pin and electric heating metal
End electrical connection, is connect by alloy fusible metal silk with that can take off pin, is alloy fusible link on off test foot.Surge voltage electricity
Flowing pass course is：The metal electrode film of pin → alloy fusible metal silk → electric heating metal exit → second → pressure-sensitive electricity can be taken off
Hinder the pin of the metal electrode film of chip → first → first.Surge voltage electric current can also sequentially back through.When varistor meets with
When meeting surge voltage, electric current, voltage dependent resistor chip conducting, metal electric heating exit has electric current to pass through, fast heating.It is connected to gold
The directly heated fusing of alloy fusible metal for belonging to fever end, reaches and fast and safely disconnects effect.
The utility model has the advantages that：
The utility model has the varistor of temperature protection（TMOV）In, in varistor（MOV）Chip-side metal electrode
On piece setting fever metal exit, when MOV chips are subjected to transient state power frequency overvoltage surge, electric current, metal fever exit
Be surge voltage, electric current the only way which must be passed.Metal electric heating material can generate heat with most fast speed at this time, make to be connected to metal
The alloy fusible metal silk fusing generated heat between exit and Ke Tuo pins disconnects, and reaches and is safely and fast detached from effect.The structure
It is not influenced by the heating property of MOV chips, MOV selects face wider, is conducive to product price control；Not by MOV breakdown points position
It influences, degradation defect point need not be set on MOV chips, protect all round properties of product；The structure makes the fusible gold of alloy
Belong to directly heated, reduce the heat dissipation in conductive process, fusing second cosmic velocity faster, is not installed and used ambient temperature effect；It should
Structure makes disengaging striking point receive the dual heat that MOV chips and electric heating metal exit generate, relatively reliable.
Description of the drawings
Fig. 1 is the structural schematic diagram inside the application insulation crust.
Fig. 2 is the explosive view inside the application insulation crust.
Fig. 3 is voltage dependent resistor chip reverse structure schematic.
Fig. 4 is insulation crust structural schematic diagram.
In attached drawing：Voltage dependent resistor chip 1, the second metal electrode layer 2, the second metal electrode film 3 can take off pin 4, alloy can
Molten wire 5, electric heating metal exit 6, second pin 7, the first pin 8, electric current kelvin effect layer 9, alloy fusible metal silk
Insulation blocking shell 10, insulation crust 11, the first metal electrode layer 12, the first metal electrode film 13.
Specific implementation mode
Embodiment 1
A kind of novel piezoresistor with temperature protection includes voltage dependent resistor chip 1, the voltage dependent resistor chip 1
Both sides welding or be crimped with the first metal electrode layer 12 and the second metal electrode layer 2, setting on the outside of first metal electrode
There are the first metal electrode film 13, second metal electrode layer, 2 outside to be provided with the second metal electrode film 3, second metal
Pin 4 can be taken off by being provided on electrode slice 3, described to take off between pin 4 and the second metal electrode film 3 through alloy fusible metal silk
5 are connected with each other.
Embodiment 2
A kind of novel piezoresistor with temperature protection includes voltage dependent resistor chip 1, the voltage dependent resistor chip 1
Both sides welding or be crimped with the first metal electrode layer 12 and the second metal electrode layer 2, setting on the outside of first metal electrode
There are the first metal electrode film 13, second metal electrode layer, 2 outside to be provided with the second metal electrode film 3, second metal
Pin 4 can be taken off by being provided on electrode slice 3, described to take off between pin 4 and the second metal electrode film 3 through alloy fusible metal silk
5 are connected with each other.
The alloy fusible metal silk 5 is linear or wavelike structure；Alloy fusible metal silk 5 be independent one section or
Multistage is in parallel.
The alloy fusible metal silk 5 is the alloy material that molten state is presented when being heated to predetermined temperature, melting range
Between 100-250 degrees Celsius.Such as tin alloy or other alloy materials.
It is connected by electric heating metal exit 6 between the alloy fusible metal silk 5 and the metal electrode film of the side.
The electric heating metal exit 6 is plates, threadlike body or the rectangular strip body of U-shaped, L-type or "-" type structure.
The electric heating metal exit 6 is the various electrothermal conductor materials by current heating.As nichrome, siderochrome are closed
Gold, Aludirome or other by current heating etc. various electrothermal conductor materials, can also be non-metal carbon fiber conductor
Thermo electric material.
With can take off 4 homonymy of pin the second metal electrode film 3 on lead to second pin 7, the first gold medal of the other side outward
Belong to and leads to the first pin 8 on electrode slice 13.
Surge voltage electric current pass course is：Can take off pin 4 → alloy fusible metal silk 5 → electric heating metal exit 6 →
Second 3 → voltage dependent resistor chip of metal electrode film, 1 → the first metal electrode film, 13 → the first pin 8.Surge voltage electric current also may be used
With sequentially back through.
The outer surface of the electric heating metal exit 6 is electroplated or coats conductive electric current kelvin effect layer 9.Electric current collection
Skin effect layer 9 is specially metal layer, and electric current kelvin effect layer 9 is act as：When product is subjected to transient state high-frequency impulse electric current, due to
Electric current kelvin effect, and increase the conveyance capacity of electric heating metal exit 6, reduce the transient state resistance value of electrothermal alloy；Increase alloy
The welding performance of electric heating metal exit 6 and other metallic conductors, that is, be electrically connected performance.
The outside that pin 4 can be taken off in the electric heating metal exit 6, alloy fusible metal silk 5 and part is provided with alloy
Fusible metal silk insulation blocking shell 10.It is marked with cosolvent inside alloy fusible metal silk insulation blocking shell 10, and passes through asphalt mixtures modified by epoxy resin
Fat surface blocks, and cosolvent plays fluxing and insulation arc extinguishing when alloy fusible metal silk 5 fuses；Alloy fusible metal silk every
It is a pentahedron box body from protective shell 10, wherein one side is provided inwardly with strip gab along open side, opening depth belongs to power generation heat
Exit is caught in depth and matches, and opening width matches with 6 thickness of electric heating metal exit being caught in or diameter is needed.Pass through
Open card forms shell and fixes in 6 root of electric heating metal exit.
It is socketed with insulation crust 11 except the voltage dependent resistor chip 1 and coupled all parts.It covers on whole
Exterior insulation protective shell outside a product is a pentahedron box body, and inside is marked with insulating epoxy.
Wire insulation blocking shell and insulation protection shell material matter are insulation, fire-retardant plastic cement or ceramics.
Electric heating metal exit 6 includes electric heating metal material ontology and is coated on being made of electric current good conductor for body exterior
Electric current " kelvin effect ".
It is boundary with alloy fusible metal silk 5, electric heating metal exit 6 can be located at the side of alloy fusible metal silk 5,
It can also be arranged in the both sides of alloy fusible metal silk 5, or be arranged 4 top unilateral side of pin can be taken off.
Second pin 7 is electrically connected with electric heating metal exit 6, by alloy fusible metal silk 5 and can take off pin 4 electrically
Connection is 5 on off test foot of alloy fusible metal silk, if the test foot when not needing external detection, monitoring break-make, can be with
It does not draw or cancels to outside.
Electric heating metal exit 6 can be vertically set within metal electrode film edge, can also level be drawn out to metal
Other than electrode slice edge.
Thermo electric material body is alloy material, and the ratio shared by various alloys in alloy material has uncertainty, can
Requirement in being actually used with root to its calorific value and electrothermal calefactive rate carries out scientific and rational allotment.
The electric current kelvin effect layer 9 being made of electric current good conductor is equipped with outside electric heating exit.The electric current kelvin effect layer 9
Can be by plating, sputter, coating, continuous casting electric current good conductor material is formed.
Both sides carry the voltage dependent resistor chip 1 of metal electrode layer, weld or are crimped on the metal electrode layer of both sides and carry
The metal electrode film of pin, the metal electrode films of both sides are the first metal electrode film 13 and second electrode sheet of varistor, the
Two pins on one metal electrode film 13, the second metal electrode film 3 are respectively the first pin 8 and second pin of varistor
7.Metal electrode on piece welding wherein or crimping electric heating metal exit 6 are drawn by alloy fusible metal silk 5 with can take off
Foot 4 is connected；Can also metal electrode film be directly connected with pin 4 can be taken off by alloy fusible metal silk 5.Pass through second pin 7
It is electrically connected with electric heating metal exit 6, is connect by alloy fusible metal silk 5 with pin 4 can be taken off, be alloy fusible link break-make
Test foot.Surge voltage electric current pass course is：Pin 4 → alloy fusible metal silk 5 → electric heating metal exit 6 → the can be taken off
Two 3 → voltage dependent resistor chips of metal electrode film, 1 → the first metal electrode film, 13 → the first pin 8.Surge voltage electric current can also
Sequentially back through.When varistor meets with surge voltage, electric current, voltage dependent resistor chip 1 is connected, and metal electric heating exit has
Electric current passes through, fast heating.It is connected to the directly heated fusing of alloy fusible metal at metal fever end, reaches and fast and safely disconnects
Effect.
The utility model has in the varistor TMOV of temperature protection, in varistor MOV chip-side metal electrode on pieces
Setting fever metal exit, when MOV chips are subjected to transient state power frequency overvoltage surge, electric current, metal fever exit is wave
Gush the only way which must be passed of voltage, electric current.Metal electric heating material can generate heat with most fast speed at this time, make to be connected to metal fever
The fusing of alloy fusible metal silk 5 between exit and Ke Tuo pins 4 disconnects, and reaches and is safely and fast detached from effect.The structure is not
It is influenced by the heating property of MOV chips, MOV selects face wider, is conducive to product price control；Not by MOV breakdown points position shadow
It rings, degradation defect point need not be set on MOV chips, protect all round properties of product；The structure makes alloy fusible metal
It is directly heated, the heat dissipation in conductive process is reduced, fusing second cosmic velocity faster, is not installed and used ambient temperature effect；The knot
Structure makes disengaging striking point receive the dual heat that MOV chips and electric heating metal exit 6 generate, relatively reliable.
Claims (10)
1. a kind of novel piezoresistor with temperature protection, it is characterised in that：Including voltage dependent resistor chip（1）, described
Voltage dependent resistor chip（1）Both sides welding or be crimped with the first metal electrode layer（12）With the second metal electrode layer（2）, described
It is provided with the first metal electrode film on the outside of one metal electrode（13）, second metal electrode layer（2）Outside is provided with the second gold medal
Belong to electrode slice（3）, second metal electrode film（3）On be provided with and can take off pin（4）, described to take off pin（4）With the second gold medal
Belong to electrode slice（3）Between pass through alloy fusible metal silk（5）It is connected with each other.
2. a kind of novel piezoresistor with temperature protection according to claim 1, it is characterised in that：The conjunction
Golden fusible metal silk（5）For linear or wavelike structure；Alloy fusible metal silk（5）For individually one or more snippets parallel connection.
3. a kind of novel piezoresistor with temperature protection according to claim 1 or 2, it is characterised in that：Institute
State alloy fusible metal silk（5）Pass through electric heating metal exit between the metal electrode film of the side（6）It is connected.
4. a kind of novel piezoresistor with temperature protection according to claim 3, it is characterised in that：The electricity
Thermometal exit（6）For the plates of U-shaped, L-type or "-" type structure, threadlike body or rectangular strip body.
5. a kind of novel piezoresistor with temperature protection according to claim 3, it is characterised in that：The electricity
Thermometal exit（6）To pass through the electrothermal conductor material of current heating or non-metal carbon fiber conductor thermo electric material.
6. a kind of novel piezoresistor with temperature protection according to claim 3, it is characterised in that：The electricity
Thermometal exit（6）Outer surface plating or coat conductive electric current kelvin effect layer（9）.
7. a kind of novel piezoresistor with temperature protection according to claim 3, it is characterised in that：Described
Electric heating metal exit（6）, alloy fusible metal silk（5）Pin can be taken off with part（4）Outside be provided with alloy fusible metal
Silk insulation blocking shell（10）；The alloy fusible metal silk insulation blocking shell（10）Inside is marked with cosolvent, and passes through asphalt mixtures modified by epoxy resin
Fat surface blocks.
8. a kind of novel piezoresistor with temperature protection according to claim 7, it is characterised in that：Alloy can
Molten wire insulation blocking shell（10）For a pentahedron box body, wherein one side is provided inwardly with strip gab along open side, opening is deep
Degree is caught in depth with power generation heat category exit and matches, opening width and the electric heating metal exit for needing to be caught in（6）Thickness or
Diameter matches, by open card in electric heating metal exit（6）Root forms shell and fixes.
9. a kind of novel piezoresistor with temperature protection according to claim 1-2,4-8 any one,
It is characterized in that：The voltage dependent resistor chip（1）And coupled all parts be covered with exterior insulation shell（11）；
The exterior insulation shell（11）For a pentahedron box body, inside is marked with insulating epoxy or plays insulation, insulation blocking
Packing material.
10. a kind of novel piezoresistor with temperature protection according to claim 9, it is characterised in that：With can
De- pin（4）Second metal electrode film of homonymy（3）On lead to second pin outward（7）, the first metal electrode of the other side
Piece（13）On lead to the first pin（8）；First pin（8）It is exposed to outside exterior insulation protective shell with pin end is detached from.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721846713.5U CN207834041U (en) | 2017-12-26 | 2017-12-26 | A kind of novel piezoresistor with temperature protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721846713.5U CN207834041U (en) | 2017-12-26 | 2017-12-26 | A kind of novel piezoresistor with temperature protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207834041U true CN207834041U (en) | 2018-09-07 |
Family
ID=63389487
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721846713.5U Expired - Fee Related CN207834041U (en) | 2017-12-26 | 2017-12-26 | A kind of novel piezoresistor with temperature protection |
Country Status (1)
| Country | Link |
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| CN (1) | CN207834041U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111768940A (en) * | 2020-06-22 | 2020-10-13 | 兴勤（常州）电子有限公司 | Heat-preserving overvoltage protection element |
-
2017
- 2017-12-26 CN CN201721846713.5U patent/CN207834041U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111768940A (en) * | 2020-06-22 | 2020-10-13 | 兴勤（常州）电子有限公司 | Heat-preserving overvoltage protection element |
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