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Piezoresistor for lightning protection

A varistor, electrode technology, applied in the direction of varistor, overvoltage protection resistor, resistance terminal/electrode, etc., can solve problems such as safety hazards, and achieve the effect of avoiding fire accidents and reducing disaster accidents.

Active Publication Date: 2010-11-17
SHENZHEN KEANDA ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned shortcomings of the laminated varistors in the prior art that have potential safety hazards, the present invention provides a new varistor structure, which sets the tripping point of the tripping electrode in the middle of the varistor substrate place, the heat generated when the varistor deteriorates can be transferred to the trip point of the trip electrode as quickly as possible, and the trip action can be generated in time

Method used

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  • Piezoresistor for lightning protection
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  • Piezoresistor for lightning protection

Examples

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Embodiment 1

[0021] Embodiment 1: Please refer to the attached figure 2 , this embodiment mainly includes a first varistor substrate 1, a second varistor substrate 2, a connecting electrode 3 and a tripping electrode 4. In this embodiment, the first varistor substrate 1 and the second varistor substrate 2 stacked settings, the two electrodes opposite the first varistor base 1 and the second varistor base 2 are defined as internal electrodes, and the other two electrodes of the first varistor base 1 and the second varistor base 2 are defined as It is an external electrode, the external electrodes of the first varistor substrate 1 and the second varistor substrate 2 are connected together through the connecting electrode 3, and the internal electrodes of the first varistor substrate 1 and the second varistor substrate 2 With trip electrode 4, please refer to the attached image 3 , in this embodiment, the main body 8 of the tripping electrode 4 is in the form of a sheet, and the sheet-shap...

Embodiment 2

[0025] Embodiment two: Please refer to the attached Figure 4 And attached Figure 5 , this embodiment also mainly includes a first varistor substrate 1, a second varistor substrate 2, a connecting electrode 3 and a tripping electrode 4. In this embodiment, the first varistor substrate 1 and the second varistor substrate The substrates 2 are stacked, the two opposite electrodes of the first varistor substrate 1 and the second varistor substrate 2 are defined as internal electrodes, and the other two electrodes of the first varistor substrate 1 and the second varistor substrate 2 Defined as an external electrode, the external electrodes of the first varistor substrate 1 and the second varistor substrate 2 are connected together through the connecting electrode 3, and the internal electrodes of the first varistor substrate 1 and the second varistor substrate 2 There is a tripping electrode 4 between them. In this embodiment, the main body 8 of the tripping electrode 4 is in the...

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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 [0001] The invention discloses a piezoresistor, in particular to a piezoresistor for low-voltage power supply lightning protection. Background technique [0002] Due to the nonlinear characteristics of the varistor, it is often used as a key component of a surge protector (ie SPD). The flow rate of surge protector is a key indicator of lightning protection performance. The size of the SPD flow rate is usually positively correlated with the cross-sectional area of ​​the varistor, that is, the larger the cross-sectional area of ​​the varistor, the greater the flow rate. In order to increase the flow rate of SPD, varistor manufacturers often stack two pieces of varistors together as a varistor. Please refer to the attachment for its structure. figure 1 , the external electrode piece (that is, the connecting electrode 3) short-circuits the two external electrodes of the two varistor substrates, and the internal electrode piece (also called the action electrode,...

Claims

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Application Information

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IPC IPC(8): H01C7/12H01C1/14
Inventor 唐斌
Owner SHENZHEN KEANDA ELECTRONICS TECH
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