CN101887790B - Piezoresistor for lightning protection - Google Patents
Piezoresistor for lightning protection Download PDFInfo
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- CN101887790B CN101887790B CN2010101998286A CN201010199828A CN101887790B CN 101887790 B CN101887790 B CN 101887790B CN 2010101998286 A CN2010101998286 A CN 2010101998286A CN 201010199828 A CN201010199828 A CN 201010199828A CN 101887790 B CN101887790 B CN 101887790B
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Abstract
The invention discloses a piezoresistor for lightning protection, comprising two piezoresistor substrates arranged in a laminated way, wherein the inner electrodes of the two piezoresistor substrates are opposite and are respectively electrically connected with tripping electrodes, the outer electrodes of the two piezoresistor substrates are respectively electrically connected with connection electrodes, the middle of each piezoresistor substrate is provided with a through hole, and a tripping point of each tripping electrode is arranged on the tripping electrode at the through hole; or the connecting end of the tripping electrode is arranged in the through hole, is electrically connected with the inner electrode of the piezoresistor substrate, and is insulated with the outer electrode of the piezoresistor substrate. In the invention, the tripping electrodes are arranged in the middle of the piezoresistor substrates, thus the heat generated by the piezoresistor can be most quickly transmitted to the tripping electrodes to make the tripping electrodes trip in time when the piezoresistor substrates begin degrading so that disaster accidents caused by the delayed separation of an SPD (Surge Protection Device) from the circuits can be reduced.
Description
Technical field
The present invention discloses a kind of piezo-resistance, particularly a kind of LVPS piezoresistor for lightning protection that relates to.
Background technology
Since the nonlinear characteristic of piezo-resistance, the key element of Chang Zuowei Surge Protector (being SPD).The through-current capacity of Surge Protector is a key index of lightning protection properties.The size of SPD through-current capacity cross-sectional area common and piezo-resistance is proportionate, and promptly the piezo-resistance cross-sectional area is big more, and through-current capacity is big more.In order to increase the through-current capacity of SPD, piezo-resistance manufactory often stacks two piezo-resistances as a piezo-resistance and uses, and its structure is please referring to accompanying drawing 1; External electric pole piece (being connection electrode 3) is with two electrode short circuits of the outside of two piezo-resistance matrixes; Internal electrode film (be also referred to as the action electrode, or dropout electrode 4) is drawn from two contacted public end face sides of piezo-resistance matrix, and this electrode slice is generally as the action electrode of piezo-resistance deterioration breaking circuit; When piezo-resistance begins deterioration; Flowing through pressure-sensitive electric current increases gradually, and piezo-resistance heating and temperature raise gradually, and fusing is connected with the circuit of this action electrode; Make SPD break away from protection circuit, avoid the disaster that causes because of the SPD fault.But the dropout electrode of laminated type piezo-resistance of the prior art is arranged on side edge, in use; When piezo-resistance begins deterioration, but it is untimely and temporary overvoltage particularly appears in the phenomenon of short circuit in power circuit the action of the overheated dropout electrode of piezo-resistance usually can to occur; When the electric current that flows through SPD reaches the ampere level; Piezo-resistance can raise by instantaneous temperature, and SPD often has little time breaking circuit, and piezo-resistance is earlier by thermal breakdown; Thereby the accident of breaking out of fire happens occasionally, and has potential safety hazard.
Summary of the invention
The shortcoming that has potential safety hazard to the above-mentioned of the prior art stacked piezo-resistance of mentioning; The present invention provides a kind of new piezo-resistance structure; Its trip point with the dropout electrode is arranged on piezo-resistance matrix midway; The heat that produces in the time of can making the piezo-resistance deterioration passes on the trip point of dropout electrode the soonest, in time produces the action of threading off.
The technical scheme that the present invention solves its technical problem employing is: a kind of piezoresistor for lightning protection; Comprise the piezo-resistance matrix that two laminations are provided with; The internal electrode of two piezo-resistance matrixes is relative, and is connected with the dropout electrode electricity respectively, and the outer electrode of two piezo-resistance matrixes is electrically connected with connection electrode respectively; Piezo-resistance matrix centre position has through hole, and the trip point on the dropout electrode is located on the dropout electrode of through hole.
A kind of piezoresistor for lightning protection; Comprise the piezo-resistance matrix that two laminations are provided with, the internal electrode of two piezo-resistance matrixes is relative, and is connected with the dropout electrode electricity respectively; The outer electrode of two piezo-resistance matrixes is electrically connected with connection electrode respectively; Piezo-resistance matrix centre position has through hole, and the link on the dropout electrode is arranged in the through hole, and trip point is arranged on this link; And the dropout electrode is electrically connected with the internal electrode of piezo-resistance matrix, with the outer electrode insulation of piezo-resistance matrix.
The technical scheme that the present invention solves its technical problem employing further comprises:
Described dropout electrode body in the form of sheets.
Have the hole on the described flake main body.
Described through hole is opened in the middle of piezo-resistance matrix.
Described through hole is opened on arbitrary piezo-resistance matrix, and the link on the dropout electrode is arranged in the through hole; Perhaps be opened in simultaneously on two piezo-resistance matrixes, the link on the dropout electrode is arranged in arbitrary through hole, and trip point is arranged on this link.
The invention has the beneficial effects as follows: the present invention is arranged on dropout electrode (promptly move electrode) in the centre position of piezo-resistance matrix; When the piezo-resistance matrix begins deterioration; The temperature of medium position is the highest; Adopt way of the present invention can the heat that piezo-resistance produces be passed to the trip point place on the dropout electrode with the fastest speed, in time make the dropout electrode produce the action of threading off, minimizing breaks away from the untimely disaster accident that causes of circuit because of SPD.The present invention also can be directly arranged in the trip point of dropout electrode on the dropout electrode; On the piezo-resistance matrix, have through hole, during use, the protection circuit connector is stretched into through hole inside be connected with trip point; Can make the dropout electrode with being heated of maximum area, produce the action of threading off with the fastest mode.Temporary overvoltage particularly appears in power circuit; When the electric current that flows through SPD reached the ampere level, the piezo-resistance instantaneous temperature raise, and heat directly is transmitted on the dropout electrode; The connection of fusing circuit in time; Make the timely breaking circuit of SPD, piezo-resistance is broken off before by the thermal breakdown short circuit and being connected of circuit, and avoids the generation of the accident of fire.
To combine accompanying drawing and embodiment that the present invention is further specified below.
Description of drawings
Fig. 1 is a lamination piezo-resistance perspective view of the prior art.
Fig. 2 is the embodiment of the invention one perspective view.
Fig. 3 is the embodiment of the invention one a dropout electrode slice perspective view.
Fig. 4 is the embodiment of the invention two perspective view.
Fig. 5 is the embodiment of the invention two side-looking structural representations.
Fig. 6 is the embodiment of the invention two dropout electrode slice perspective view.
Among the figure, the 1-first piezo-resistance matrix, the 2-second piezo-resistance matrix, 3-connection electrode, 4-dropout electrode, 5-through hole, 6-trip point, 7-protection circuit connector, 8-main body, 9-link, 10-hole.
Embodiment
Present embodiment is the preferred embodiment for the present invention, and other all its principles are identical with present embodiment or approximate with basic structure, all within protection range of the present invention.
Embodiment one: please referring to accompanying drawing 2, present embodiment mainly comprises the first piezo-resistance matrix 1, the second piezo-resistance matrix 2, connection electrode 3 and dropout electrode 4, in the present embodiment; The first piezo-resistance matrix 1 and the 2 range upon range of settings of the second piezo-resistance matrix, the first piezo-resistance matrix 1 and the second piezo-resistance matrix, 2 two relative electrode definitions are internal electrode, two other electrode definition of the first piezo-resistance matrix 1 and the second piezo-resistance matrix 2 is an outer electrode; The outer electrode of the first piezo-resistance matrix 1 and the second piezo-resistance matrix 2 links together through connection electrode 3, is provided with dropout electrode 4 between the internal electrode of the first piezo-resistance matrix 1 and the second piezo-resistance matrix 2, please referring to accompanying drawing 3; In the present embodiment, the main body 8 of dropout electrode 4 has hole 10 in the form of sheets on the flake main body 8; Can conveniently thread off the on the one hand installation of electrode 4 can prevent in use also that on the other hand dropout electrode 4 produces eddy current; Be extended with link 9 on the flake main body 8; In the present embodiment, link 9 outer tip end are trip point 6, promptly when piezo-resistance begins deterioration; Piezo-resistance can be separated from trip point 6 and protective circuit, breaks off with protective circuit.
In the present embodiment; The first piezo-resistance matrix 1 or the second piezo-resistance matrix, 2 centre positions have a through hole 5; Through hole 5 is preferably offered the middle that the position is the first piezo-resistance matrix 1 or the second piezo-resistance matrix 2; Link 9 on the dropout electrode 4 is arranged in the through hole 5; The link 9 of electrode 4 of promptly threading off is drawn from the centre position of the first piezo-resistance matrix 1 or the second piezo-resistance matrix 2, and dropout electrode 4 is electrically connected with the internal electrode of the first piezo-resistance matrix 1 and the second piezo-resistance matrix 2, and with the outer electrode insulation of the first piezo-resistance matrix 1 and the second piezo-resistance matrix 2.
Present embodiment is connected connection electrode 3 respectively with dropout electrode 4 in use with protective circuit, dropout electrode 4 is connected with protection circuit connector 7 (protection circuit connector 7 does not belong to parts of the present invention) at trip point 6 places.When piezo-resistance begins deterioration, break off disengaging from trip point 6 and protection circuit connector 7 among the present invention.
Present embodiment also has a kind of variant; Promptly all have a through hole 5 in the centre position of the first piezo-resistance matrix 1 and the second piezo-resistance matrix 2; Stretch out in the through hole 5 of the link 9 of dropout electrode 4 on the first piezo-resistance matrix 1 or the second piezo-resistance matrix 2, be more convenient for producing, assembling.
Embodiment two: please referring to accompanying drawing 4 and accompanying drawing 5; Present embodiment equally mainly comprises the first piezo-resistance matrix 1, the second piezo-resistance matrix 2, connection electrode 3 and dropout electrode 4, in the present embodiment, and the first piezo-resistance matrix 1 and the 2 range upon range of settings of the second piezo-resistance matrix; The first piezo-resistance matrix 1 and the second piezo-resistance matrix, 2 two relative electrode definitions are internal electrode; Two other electrode definition of the first piezo-resistance matrix 1 and the second piezo-resistance matrix 2 is an outer electrode, and the outer electrode of the first piezo-resistance matrix 1 and the second piezo-resistance matrix 2 links together through connection electrode 3, is provided with dropout electrode 4 between the internal electrode of the first piezo-resistance matrix 1 and the second piezo-resistance matrix 2; In the present embodiment; The main body 8 of dropout electrode 4 in the form of sheets, flake main body 8 is provided with hole 10, the installation of the electrode 4 of can conveniently threading off on the one hand; Can prevent in use also that on the other hand dropout electrode 4 produces eddy current.
In the present embodiment; The first piezo-resistance matrix 1 or the second piezo-resistance matrix, 2 centre positions have a through hole 5; Through hole 5 is preferably offered the middle that the position is the first piezo-resistance matrix 1 or the second piezo-resistance matrix 2, and the part corresponding to through hole 5 positions on the dropout electrode 4 is a trip point 6, promptly when piezo-resistance begins deterioration; Piezo-resistance can be separated from trip point 6 and protective circuit, breaks off with protective circuit.
Present embodiment is connected connection electrode 3 respectively with dropout electrode 4 in use with protective circuit, dropout electrode 4 is in protection circuit connector 7 (protection circuit connector 7 does not belong to the utility model parts) in trip point 6 and connects.In the present embodiment, protection circuit connector 7 directly stretches in the through hole 5 on the piezo-resistance matrix, directly is connected with trip point 6.When piezo-resistance begins deterioration, break off disengaging from trip point 6 and protection circuit connector 7 in the utility model.Trip point 6 in the present embodiment is located at piezo-resistance inside, and the action of threading off is more timely.
Present embodiment also has a kind of variant; Promptly all have a through hole 5 in the centre position of the first piezo-resistance matrix 1 and the second piezo-resistance matrix 2; During use, can select one protection circuit connector 7 is connected with trip point 6, be more convenient for producing, assembling.
The present invention is arranged on dropout electrode (promptly move electrode) in the centre position of piezo-resistance matrix; When the piezo-resistance matrix begins deterioration; The temperature of medium position is the highest; Adopt way of the present invention can the heat that piezo-resistance produces be passed to the trip point place on the dropout electrode with the fastest speed, in time make the dropout electrode produce the action of threading off, minimizing breaks away from the untimely disaster accident that causes of circuit because of SPD.The present invention also can be directly arranged in the trip point of dropout electrode on the dropout electrode; On the piezo-resistance matrix, have through hole, during use, the protection circuit connector is stretched into through hole inside be connected with trip point; Can make the dropout electrode with being heated of maximum area, produce the action of threading off with the fastest mode.Temporary overvoltage particularly appears in power circuit; When the electric current that flows through SPD reached the ampere level, the piezo-resistance instantaneous temperature raise, and heat directly is transmitted on the dropout electrode; The connection of fusing circuit in time; Make the timely breaking circuit of SPD, piezo-resistance is broken off before by the thermal breakdown short circuit and being connected of circuit, and avoids the generation of the accident of fire.
Claims (8)
1. piezoresistor for lightning protection; Comprise the piezo-resistance matrix that two laminations are provided with; The internal electrode of two piezo-resistance matrixes is relative, and is connected with the dropout electrode electricity respectively, and the outer electrode of two piezo-resistance matrixes is electrically connected with connection electrode respectively; It is characterized in that: the centre position of the arbitrary piezo-resistance matrix in the described piezo-resistance matrix or two piezo-resistance matrixes has through hole, and the trip point on the dropout electrode is located on the dropout electrode of through hole.
2. piezoresistor for lightning protection according to claim 1 is characterized in that: described dropout electrode body in the form of sheets.
3. piezoresistor for lightning protection according to claim 2 is characterized in that: have the hole on the described flake main body.
4. according to claim 1 or 2 or 3 described piezoresistor for lightning protection, it is characterized in that: described through hole is opened in the middle of piezo-resistance matrix.
5. piezoresistor for lightning protection; Comprise the piezo-resistance matrix that two laminations are provided with, the internal electrode of two piezo-resistance matrixes is relative, and is connected with the dropout electrode electricity respectively; The outer electrode of two piezo-resistance matrixes is electrically connected with connection electrode respectively; It is characterized in that: the centre position of the arbitrary piezo-resistance matrix in the described piezo-resistance matrix or two piezo-resistance matrixes has through hole, and the link on the dropout electrode is arranged in the through hole, and trip point is arranged on this link; And the dropout electrode is electrically connected with the internal electrode of piezo-resistance matrix, with the outer electrode insulation of piezo-resistance matrix.
6. piezoresistor for lightning protection according to claim 5 is characterized in that: described dropout electrode body in the form of sheets.
7. piezoresistor for lightning protection according to claim 6 is characterized in that: have the hole on the described flake main body.
8. according to claim 5 or 6 or 7 described piezoresistor for lightning protection, it is characterized in that: described through hole is opened in the middle of piezo-resistance matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101998286A CN101887790B (en) | 2010-06-13 | 2010-06-13 | Piezoresistor for lightning protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101998286A CN101887790B (en) | 2010-06-13 | 2010-06-13 | Piezoresistor for lightning protection |
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| Publication Number | Publication Date |
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| CN101887790A CN101887790A (en) | 2010-11-17 |
| CN101887790B true CN101887790B (en) | 2012-07-04 |
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| CN2010101998286A Active CN101887790B (en) | 2010-06-13 | 2010-06-13 | Piezoresistor for lightning protection |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102254658A (en) * | 2011-04-29 | 2011-11-23 | 常州市创捷防雷电子有限公司 | Heat island positioning piezoresistor and heat island positioning method thereof |
| CN105468815B (en) * | 2015-11-02 | 2019-04-26 | 广东明家科技股份有限公司 | A kind of thermotropic Damage assessment method and system of the varistor of lightning-protected product |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200823934A (en) * | 2006-11-30 | 2008-06-01 | Thinking Electronic Ind Co Ltd | Varistor with over heating protection |
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| JPS61428U (en) * | 1984-06-05 | 1986-01-06 | 株式会社村田製作所 | Thermistor device for surge current suppression |
| MXPA06012057A (en) * | 2004-04-19 | 2007-01-25 | Soule Protection Surtensions | Surge voltage protection device with improved disconnection and visual indication means. |
| DE102006042028B3 (en) * | 2006-07-19 | 2007-09-27 | Dehn + Söhne Gmbh + Co. Kg | Separation device for pluggable surge arrester, has metallic form part and finger standing under self-spring stress, where finger is supported at guide and is engaged into space closed by u-shaped end of metallic form part |
| CN201044193Y (en) * | 2006-12-26 | 2008-04-02 | 深圳市恒毅兴实业有限公司 | Lightning protection voltage dependent resistor valve sheet tripping mechanism |
| DE102007042991B4 (en) * | 2007-06-11 | 2009-09-17 | Dehn + Söhne Gmbh + Co. Kg | Surge protection device with mechanical disconnection device activated in thermal overload |
| DE102008031917B4 (en) * | 2008-07-08 | 2017-06-22 | Phoenix Contact Gmbh & Co. Kg | Snubber |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200823934A (en) * | 2006-11-30 | 2008-06-01 | Thinking Electronic Ind Co Ltd | Varistor with over heating protection |
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Application publication date: 20101117 Assignee: Shenzhen Keanda Rail Transit Technology Co., Ltd. Assignor: Shenzhen Keanda Electronic Technology Co., Ltd. Contract record no.: 2012440020419 Denomination of invention: Piezoresistor for lightning protection Granted publication date: 20120704 License type: Exclusive License Record date: 20121225 |
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