Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Overcurrent Protection Components

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 complex process, can not guarantee the complete encapsulation of products, etc., to achieve the effect of reducing production costs

Active Publication Date: 2016-02-24
SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small size of the product itself, this process is more complicated, and it cannot guarantee that the product is completely encapsulated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Overcurrent Protection Components
  • Overcurrent Protection Components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 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.

[0044] Table 1

[0045]

[0046] Among them, HDPE is high-density polyethylene (density 0.942g / cm3, melting point: 124°C), the particle size of nickel powder is 3.50 μm, and the particle size of titanium carbide is 0.4 μm. The purity of magnesium hydroxide is 96.7 wt%.

[0047] The production process is as follows: weigh according to the material ratio shown in Table 1, put it into a vertical ball mill for pre-mixing for about 30 minutes, and divide it into 4 groups evenly after pre-mixing, and set the feed temperature of the internal mixer to 180°C, Add one group to the internal mixer, the speed is 25rpm, and the internal mixing time is 3 minutes; then the second group of materials is added, and the internal mixing time is 5 minutes; the third group of materials is added, and the internal mixing time is...

Embodiment 2

[0064] Others are the same as in Example 1, except that the formula is different. The formula (weight: gram) of the PTC material layer is: high density polyethylene 200, titanium carbide 720, nickel powder 800, magnesium hydroxide 30, processing aid 0.8.

Embodiment 3

[0066] Others are the same as in Example 1, except that the formula is different. The formula (weight: gram) of the PTC material layer is: high density polyethylene 200, titanium carbide 800, nickel powder 960, magnesium hydroxide 80, processing aid 1.2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to an over-current protection element, which comprises a PTC material layer and two metal foils attached to the upper surface and the lower surface of the PTC material layer and is characterized in that two rough surfaces of the two metal foils are directly in physical contact with the PTC material layer; and the volume resistance value of the over-current protection element is smaller than 0.1omega / cm. The PTC material layer is prepared by mixing the components of at least one crystalline macromolecule polymer, oxygen-free conductive ceramic powder of which the grain size is 0.1-1.0mu m and the volume resistance is smaller than 500mu omega / cm, conductive metal powder of which the grain size is 0.5-5mu m and the volume resistance is smaller than 500mu omega / cm, and non-conductive filler. The over-current protection element has the advantages that due to the low volume resistance value of the PTC material layer, the area of the PTC chip required by the element can be reduced to be 20mm<2> while the purpose of low resistance can still be realized for the element, so that more PTC chips can be produced from each PTC material layer finally, thus lowering the production cost.

Description

technical field [0001] The present invention relates to an overcurrent protection element, especially an overcurrent protection element with PTC conductive composite material. The overcurrent protection element has excellent volume resistance value, resistance reproducibility and long-term resistance weather resistance, It is especially suitable for the protection of power supply of mobile communication equipment and digital products. Background technique [0002] Since the resistance of conductive composite materials with positive temperature coefficient (PositiveTemperatureCoefficient; PTC) characteristics is sensitive to temperature changes, it can be used as a material for current sensitive components, and has been widely used in current protection components or circuit components. Positive temperature coefficient overcurrent protection components (PTC) based on polymer core materials have been widely used in communications, computers, automobiles, industrial control, ho...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/13H01C7/02C08L23/06C08K3/08C08K3/22C08K3/14
Inventor 高道华刘正平王军吴国臣
Owner SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com