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Overcurrent protecting component and its production

A technology for protecting components and manufacturing methods, applied in the direction of current response resistors, resistors with positive temperature coefficients, etc., can solve problems such as difficult mass production and inability to form

Inactive Publication Date: 2010-05-12
POLYTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ideal situation is to control the cross-linking chemical reaction not to occur during the PTC production process, and not start the cross-linking chemical reaction until the PTC needs to be shaped and solidified. However, because PTC materials need to be produced at high temperatures (>150°C), this The ideal situation is difficult to achieve, because the peroxide has already started to react in the general PTC high-temperature process, causing the PTC to solidify in advance and cannot be molded. Therefore, the chemical cross-linking method is not easy to mass-produce in the manufacture of polymer PTC.

Method used

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  • Overcurrent protecting component and its production
  • Overcurrent protecting component and its production
  • Overcurrent protecting component and its production

Examples

Experimental program
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Embodiment 1

[0026] Embodiment one: if figure 1 As shown, the A layer 12 and the B layer 14 are cross-stacked in the order of A-B-A-B- to form a multi-layer sheet, and the temperature of 200 ° C and 150 kg / cm 2 The two electrode foils 18 (nickel foils in this embodiment) are bonded to the upper and lower sides of the multi-layer sheet. The pressing time is 30 minutes for chemical crosslinking to form the chemically crosslinked PTC material layer 16, and then cooled to room temperature. The resulting chemically cross-linked PTC material layer 16 has a thickness of 3.6 mm, and is finally cut out with a diamond knife such as figure 2 The PTC element 10 shown. The PTC element 10 has an area of ​​7.9 mm×12.4 mm, and includes a chemically cross-linked PTC material layer 16 composed of the conductive polymer and upper and lower electrode foils 18 composed of the nickel foil. The chemically cross-linked PTC element 10 is subjected to a heat treatment step at 150° C. for 10 hours to enhance the...

Embodiment 2

[0027] Embodiment two: if figure 1 As shown, the A layer 12 and the C layer 14 are cross-stacked in the order of A-C-A-C- to form a multi-layer sheet, and the temperature of 200 ° C and 150 kg / cm 2 The pressure of two electrode foils 18 (nickel foil in this embodiment) is attached to the upper and lower sides of the multi-layer sheet. The pressing time is 30 minutes to achieve chemical cross-linking and form a chemical cross-linked PTC material Layer 16. is cooled to room temperature afterwards, and the thickness of the chemically cross-linked PTC material layer 16 of gained is 3.6mm, cut out with diamond knife at last such as figure 2 The PTC element 10 shown. The area of ​​the PTC element 10 is 7.9mm×12.4mm, and includes a positive temperature coefficient material layer 16 composed of the conductive polymer and an upper layer composed of the nickel foil, Lower electrode foil 18. The chemically cross-linked PTC element 10 is subjected to a heat treatment step at 150°C for 1...

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Abstract

An over-current protection component relates to one chemical cross-linking positive temperature coefficient (PTC) material layer and two electrode-foils which connecting with one electrical source andlet current flow by chemical cross-linking PTC material layer. The said layer contains with at least two kinds of polymer layers with PTC characteristic. Each of layers has macromolecule polymer andconductivity filling with volume resistance from 10-1 to 103-cm. Each polymer layer with different chemical functional group piles and arranges in type of series, after chemical cross linking reactionto produce functional group between layer and layer and to form a chemical cross linking PTC material layer. The voltage of each chemical cross linking PTC material layer with thickness of 0.1 mm isn't over 30 volts.

Description

technical field [0001] The present invention relates to an overcurrent protection element and a manufacturing method thereof, in particular to an overcurrent protection element with positive temperature coefficient (Positive Temperature Coefficient; PTC) characteristics and high voltage resistance and a manufacturing method thereof. Background technique [0002] The resistance value of conventional PTC elements responds quite sensitively to temperature changes. When the PTC element is in normal use, its resistance can maintain the lowest value so that the circuit can operate normally. However, when the temperature rises to a critical temperature due to an over-current or over-temperature phenomenon, its resistance value instantly jumps to a high resistance state (for example, 10 4 ohm) and reverse the excess current to achieve the purpose of protecting the battery or circuit components. Since the PTC element can effectively protect electronic products, it has been seen tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/13H01C7/02
Inventor 王绍裘朱复华马云晋
Owner POLYTRONICS TECH