overcurrent protection device

A protection device and overcurrent technology, applied in the direction of circuits, resistors, electrical components, etc., can solve problems such as circuit protection device failures, and achieve the effect of low initial resistance and sufficient peel strength

Active Publication Date: 2022-04-12
FUZETEC TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the volume resistance of the circuit protection device described in the aforementioned U.S. Patent No. 6,238,598 is not lower than 0.15 ohm-cm
If the use of grafted polyolefin is excluded in the PTC polymer blend composition, the volume resistance can be reduced to close to 0.1 ohm-cm, but the peel strength between the PTC element and the electrode will decrease accordingly to 0.4kg / cm 2 , so that the PTC element and the electrode can be easily separated, resulting in failure or damage to the circuit protection device

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057]

[0058] 10g HDPE (purchased from Taiwan Plastic Industry Co., Ltd., product model: HDPE9002) as non-grafted polyolefin, and 10 g of HDPE (MA-g-HDPE, purchased from DuPont, product model: MB100D ) as the polyolefin grafted with unsaturated carboxylic acid anhydride for the first polymer composition of the first polymer layer 31 and the third polymer composition of the third polymer layer 33 . 30g carbon black powder (purchased from Columbian Chemicals Co., product model: Raven430UB, DBP / D is 0.95, bulk density is 0.53g / cm 3 ) is used as the particulate conductive filler for the first polymer layer 31 and the third polymer layer 33. 20 g of HDPE (purchased from Taiwan Plastic Industry Co., Ltd., product model: HDPE9002) was used as the second polymer composition of the second polymer layer 32 . 30 g of carbon black powder (available from Columbian Chemicals Co., product model: Raven 430UB) was used as the granular conductive filler of the second polymer layer 32 . Th...

Embodiment 2 to 4

[0062]

[0063] The processing conditions of the test samples of embodiments 2 to 4 (E2-E4) are similar to those of embodiment 1, the difference is that the HDPE and MA-g-HDPE of the first polymer composition and the third polymer composition The usage amounts were changed as shown in Table 1.

Embodiment 5 to 8

[0064]

[0065] The processing conditions of the test samples of Examples 5 to 8 (E5-E8) are similar to those of Examples 1 to 4 in sequence, the difference lies in the stacking of the first polymer layer 31, the second polymer layer 32 and the first polymer layer 32. Before the three polymer layers 33, the second polymer layer 32 is formed with a plurality of perforations 320 (the diameter of each perforation is 1.0mm, and its area is 0.7854mm 2 ), and the perforation density is 9 holes / cm 2 .

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Abstract

An overcurrent protection device includes a first electrode, a second electrode and a positive temperature coefficient multilayer structure including a first polymer layer, a second polymer layer and a third polymer layer. The first polymer layer is bonded to the first electrode and has a first polymer substrate made of a first polymer composition. The second polymer layer has perforations and has a second polymer substrate made of a second polymer composition. The third polymer layer is bonded to the second electrode and has a third polymer substrate made of a third polymer composition. The overcurrent protection device of the present invention has both low initial resistance and sufficient peeling strength.

Description

technical field [0001] The present invention relates to an overcurrent protection device, in particular to an overcurrent protection device comprising three polymer layers with polymer substrates made of different polymer compositions. Background technique [0002] refer to figure 1 , because a positive temperature coefficient (positive temperature coefficient, PTC) overcurrent protection device has a PTC effect, it can be used as a circuit protection device 1 . The existing circuit protection device 1 comprises a PTC polymer layer 11 and two electrodes 12 attached to two opposite surfaces of the PTC polymer layer 11, and the PTC polymer layer 11 comprises a polymer matrix containing a crystalline region and an amorphous region. material, and granular conductive fillers, which are dispersed in the amorphous region of the polymer substrate and form continuous conductive paths for electrically connecting the electrodes 12 . The PTC effect refers to a phenomenon that when the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/02
CPCH01C7/021H01C7/028
Inventor 陈继圣江长鸿
Owner FUZETEC TECHNOLOGY CO LTD
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