Overcurrent protection device

A protection device, overcurrent technology, applied in the direction of current-responsive resistors, resistors with positive temperature coefficients, etc.

Inactive Publication Date: 2017-03-29
FUZETEC TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operating voltage or breakdown voltage of the overcurrent protection device including the aforementioned conductive polymer can only reach 30Vdc according to the thermal runaway test.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A first sheet of PTC polymer material (as the first PTC polymer material layer) was prepared from formulation (1) comprising 1.175 g of HDPE (available from Taiwan Plastics Corporation; model number HDPE9002; The weight average molecular weight is 150,000g / mole; according to ASTM D-1238, at a temperature of 230°C and a load of 12.5kg, the melt flow rate is 45g / 10min), 1.175g of carboxylic acid anhydride grafted (carboxylicacidanhydride grafted) HDPE Polyethylene (available from DuPont; model MB100D; weight average molecular weight 80,000 g / mole; melt flow rate 75 g / 10 min at 230° C. with a load of 12.5 kg according to ASTM D-1238), 21.15g of PVDF (purchased from Arkema; ​​model Kynar 761; melting point 170°C; temperature of 230°C and load of 12.5kg, melt flow rate of 3.0g / 10min), and 26.5g of carbon black particles [purchased From Columbia Chemical Company; Trade name Raven 430UB; Average particle size 82nm; DBP oil-absorption (DBP-oil absorption) is 75cc / 100g; Volatile...

Embodiment 7 and 8

[0059]

[0060] The preparation process and conditions of the test samples of Examples 7 and 8 (E7 and E8), except that each PTC laminate of Examples 7 and 8 also includes a third sheet of PTC polymer material, are the same as those of this Example 1 is similar.

[0061] The compositions of the PTC laminates of Examples 7 and 8 are shown in Table 2. The average resistances of the test samples of Examples 7 and 8 are shown in Table 2.

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Abstract

The invention provides an overcurrent protection device, which comprises a first electrode, a second electrode and a multi-layer structure, wherein the multi-layer structure comprises a first PTC polymer material layer and a second PTC polymer material layer. The first PTC polymer material layer comprises a first polymer matrix material and a particulate conductive filler dispersed into the first polymer matrix material; and the first polymer matrix material is prepared from a first polymeric composition. The second PTC polymer material layer comprises a second polymer matrix material and a particulate conductive filler dispersed into the second polymer matrix material; and the second polymer matrix material is prepared from a second polymeric composition. One of the first polymeric composition and the second polymeric composition contains polyvinylidene fluoride and polyolefin and the other one contains polyolefin or polyvinylidene fluoride. Due to the multi-layer structure design, the operating temperature and voltage ranges of the overcurrent protection device are wider.

Description

technical field [0001] The present invention relates to an overcurrent protection device, in particular to an overcurrent protection device comprising two PTC polymer material layers, wherein one PTC polymer material layer is composed of polyvinylidene fluoride (polyvinylidene fluoride, PVDF) And a polymer substrate made of a polymer composition of polyolefin (polyolefin). Background technique [0002] A positive temperature coefficient (positive temperature coefficient, PTC) material is suitable as a protection device (such as a fuse (fuse)) due to its positive temperature coefficient effect. [0003] refer to figure 1 , the existing overcurrent protection device includes a PTC polymer material layer 81 , and a first electrode 82 and a second electrode 83 respectively formed on two opposite surfaces of the PTC polymer material layer 81 . The PTC polymer material layer 81 includes a polymer substrate of a polymer material and conductive particle fillers (not shown). The p...

Claims

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Application Information

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IPC IPC(8): H01C7/02H01C7/13
Inventor 陈继圣江长鸿
Owner FUZETEC TECHNOLOGY CO LTD
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