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PPTC (polymeric positive temperature coefficient) thermosensitive resistor with high voltage withstanding grade and preparing method of PPTC (polymeric positive temperature coefficient) thermosensitive resistor

A technology for thermistors and manufacturing methods, applied in the direction of resistors with positive temperature coefficients, manufacturing encapsulation/housing resistors, etc., can solve the problem of increasing the installation size of PPTC thermistors, low voltage resistance, and easy Problems such as creepage occur, to reduce the probability of creepage, improve withstand voltage, and prevent breakdown

Inactive Publication Date: 2015-06-03
SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a PPTC thermistor with a high withstand voltage level, and to solve the problem that the current PPTC thermistor has a low withstand voltage capability under the premise of avoiding increasing the installation size of the PPTC thermistor. Creepage is prone to occur when used under voltage conditions, resulting in insulation damage

Method used

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  • PPTC (polymeric positive temperature coefficient) thermosensitive resistor with high voltage withstanding grade and preparing method of PPTC (polymeric positive temperature coefficient) thermosensitive resistor
  • PPTC (polymeric positive temperature coefficient) thermosensitive resistor with high voltage withstanding grade and preparing method of PPTC (polymeric positive temperature coefficient) thermosensitive resistor
  • PPTC (polymeric positive temperature coefficient) thermosensitive resistor with high voltage withstanding grade and preparing method of PPTC (polymeric positive temperature coefficient) thermosensitive resistor

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Embodiment Construction

[0047] Please refer to the accompanying drawings below to further describe the present invention.

[0048] as attached figure 1 It is a schematic diagram of the appearance of the components of the present invention, attached figure 2 Schematic diagram of the combined structure of PPTC core material and metal foil and attached image 3 As shown in the cross-sectional view of the combination of PPTC core material and metal foil, a PPTC thermistor with high withstand voltage level includes PPTC core material 1, left and right metal foils attached to the PPTC core material 1 The foils 21, 22, the left and right electrodes 31, 32 welded on the outer surface of the metal foil and the insulating layer 4 covering the outside, such as figure 1 As shown, wherein: upper and lower grooves 5, 5' are engraved on the relative upper and lower surfaces of the left and right metal foils on the PPTC core material 1; the thickness of the PPTC core material 1 is 1.0-5.0mm. Such as figure 2 ,...

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Abstract

The invention relates to a PPTC (polymeric positive temperature coefficient) thermosensitive resistor with a high voltage withstanding grade and a preparing method of the PPTC (polymeric positive temperature coefficient) thermosensitive resistor. The PPTC thermosensitive resistor comprises a PPTC core material, metal foils which are attached to two opposite surfaces of the PPTC core material, electrodes which are welded on the outer surfaces of the metal foils, and insulating layers which are wrapped outside, wherein at least one groove is formed in at least one surface of the PPTC core material without attaching the metal foils; the PPTC core material is 1.0-5.0mm thick. The invention further provides the preparing method of the PPTC thermosensitive resistor with the high voltage withstanding grade. The PPTC thermosensitive resistor provided by the invention has the advantages that under the condition that the thickness of a PPTC chip is not changed, the surface distance between the two metal foils is greatly increased, the surface creepage probability of the PPTC core material is greatly reduced, and a breakdown phenomenon of the PPTC thermosensitive resistor working in a high voltage state is effectively prevented. Under the same volume, the highest endurable voltage is increased by 30% or more compared with that of a PPTC thermosensitive resistor prepared by using a universal method, and the continuous working period under high voltage is prolonged by 50% or more.

Description

technical field [0001] The invention relates to a PPTC thermistor with a high withstand voltage level and a manufacturing method thereof, and relates to electronic circuit passive protection components and a manufacturing method thereof using a polymer conductive composite material as a main raw material. Background technique [0002] Polymer-based positive temperature coefficient (PPTC) thermistor is a very important overcurrent protection component in current circuit protection. PPTC thermistors can be used in security units of various communication lines and integrated circuits of power electronic equipment. When part of the communication line is disturbed by lightning or is in contact with the power line, or when various connector ports are subjected to short-circuit fault current, the resistance of the PPTC thermistor will increase rapidly, making the line appear in a high-impedance (disconnected) state, and the circuit The current amplitude is reduced, which protects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/02H01C17/02
Inventor 赵涛孙天举封海通温伟
Owner SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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