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Over-current protection element

A technology for protecting components and overcurrents, applied in electrical components, current-responsive resistors, circuits, etc., can solve the problems of poor adhesion and difficult control of resistance reproducibility, and achieve the effect of cost reduction

Inactive Publication Date: 2011-07-13
POLYTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because metal powder does not have a concave-convex surface like carbon black, and there is no obvious chemical functional group on the surface of metal powder, its adhesion to polyolefin and other polymers is worse than that of carbon black, making its resistance reproducibility difficult to control.

Method used

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Examples

Experimental program
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Embodiment Construction

[0023] The composition of the overcurrent protection device of the present invention is described below, including Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4, Comparative Example 1, Comparative Example 2 and related manufacturing processes.

[0024] 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.

[0025] Table I

[0026]

Material

LDPE-1

HDPE-1

HDPE-2

BN

AlN

Si 3 N 4

carbon black

(Carbon

Black)

Ni

Embodiment one

8.5

16.5

-

5

-

-

-

160

Embodiment two

8.2

-

17.6

4.4

-

-

-

156

Embodiment three

8.5

16.5

-

-

5.2

-

-

160

Embodiment four

8.2

-

17.6

-

-

5.4

...

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PUM

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Abstract

The invention relates to an over-current protection element. The element comprises two metal foils and a PTC (positive temperature coefficient) material layer, wherein the PTC material layer is stacked between the two metal foils and the volume resistance of the PTC material layer is less than 0.1omega-cm; the PTC material layer comprises (i) various crystalline high polymers which comprise at least one crystalline high polymer with melting point being lower than 115 DEG C, (ii) a conductive nickel metal packing with volume resistance being less than 500muomega-cm and (iii) a non-conductive nitride metal packing; and the conductive nickel metal packing and the non-conductive nitride metal packing are dispersed in various crystalline high polymers.

Description

technical field [0001] The invention relates to an overcurrent protection element. Background technique [0002] Since the resistance of conductive composite materials with positive temperature coefficient (Positive Temperature Coefficient; PTC) characteristics responds sensitively to temperature changes, it can be used as a material for current sensing components and has been widely used in overcurrent protection components or circuit components. superior. Because the resistance of the PTC conductive composite material can maintain an extremely low value at normal temperature, the circuit or battery can work normally. However, when an over-current or over-temperature phenomenon occurs in a circuit or battery, its resistance value will instantly increase to a high resistance state (at least 102Ω), and the excess current will be reduced. In order to achieve the purpose of protecting the battery or circuit components. [0003] Generally speaking, the PTC conductive composit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/13H01C7/02H01B1/00H01B1/22
Inventor 沙益安罗国彰朱复华
Owner POLYTRONICS TECH
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