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Overcurrent protection component

A technology for protecting components and overcurrent, applied in the direction of current-responsive resistors, resistors with positive temperature coefficient, etc., can solve the problems of resistance rise, easy oxidation, poor resistance reproducibility, etc., and achieve the effect of reducing production costs

Inactive Publication Date: 2007-02-21
POLYTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, if nickel is not tightly protected and insulated from air, it will be easily oxidized after a period of time, resulting in an increase in resistance.
In addition, after the conductive composite material is tripped, its resistance reproducibility is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The two components (Example 1 and Example 2) and the manufacturing process of the overcurrent protection device of the present invention are described below.

[0019] The composition and weight (unit: gram) of the PTC material layer used in the overcurrent protection element of the present invention are shown in Table 1.

[0020] LDPE-1

HDPE-1

HDPE-2

Mg(OH) 2

TiC

Embodiment one

12.66

0.50

----

5.04

92.60

Embodiment two

11.20

----

----

5.04

93.60

comparative example

----

3.16

12.65

4.20

90.90

[0021] Among them, LDPE-1 is low-density crystalline polyethylene (density: 0.924g / cm 3 , melting point: 113°C); HDPE-1 is high-density crystalline polyethylene (density: 0.943g / cm 3 , melting point: 125°C); HDPE-2 is high-density crystalline polyethylene (density: 0.962g / cm 3 , melting point: 131°C); Mg(OH) 2 Magnes...

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Abstract

The over current protection component includes two pieces of metal foil, and a material layer with Positive Temperature Coefficient (PTC). Being between two pieces of metal foil, the PTC material layer includes multiple crystalline high molecular polymers, a conducting ceramic stuffing and a non-conducting stuffing. Grain size of the said conducting ceramic stuffing possesses a specific distribution. Volume resistance of the said PTC material layer is smaller than 0.1 ohm / cm.

Description

technical field [0001] The present invention relates to an overcurrent protection element, more specifically, an overcurrent protection element with a PTC conductive composite material, the overcurrent protection element has a preferred volume resistance value and resistance reproducibility, and is especially suitable for mobile Power supply protection for communication equipment. Background technique [0002] Since the resistance of conductive composite materials with positive temperature coefficient (Positive Temperature Coefficient; PTC) characteristics has the characteristics of sensitive response to temperature changes, it can be used as a material for current sensing elements, and has been widely used in overcurrent protection elements or circuits. component. Because the resistance of the PTC conductive composite material can maintain an extremely low value at normal temperature, the circuit or battery can operate normally. However, when an over-current or over-tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/13H01C7/02
Inventor 王绍裘朱复华罗国彰
Owner POLYTRONICS TECH
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