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Thermistor element

A thermistor element and component technology, applied in the direction of electrical components, resistors, non-adjustable metal resistors, etc., can solve the problem of low maintenance current, achieve high maintenance current, and meet the effect of protection use

Active Publication Date: 2016-04-06
POLYTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem of low maintenance current of traditional PTC components using carbon black, the present invention uses different conductive fillers and composition ratios, so that PTC components still have high maintenance current at high temperature

Method used

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Embodiment Construction

[0021] In order to make the above-mentioned and other technical content, features and advantages of the present invention more obvious and understandable, the following specifically cites relevant embodiments, together with the attached drawings, for detailed description as follows:

[0022] The composition and weight (unit: gram) of the polymer material layer used in the thermistor element of the present invention are shown in Table 1. Among them, LDPE-1 is low-density crystalline polyethylene (density: 0.924g / cm 3 , melting point: 113°C); HDPE-1 is high-density crystalline polyethylene (density: 0.943g / cm 3 , melting point: 125°C); HDPE-2 is high-density crystalline polyethylene (density: 0.961g / cm 3 , melting point: 131°C). The conductive fillers are titanium carbide (TiC), tungsten carbide (WC) and molybdenum carbide (MoC). In the embodiment of the present invention, the weight percentage of the conductive filler in the polymer material layer ranges from 72% to 96%, esp...

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Abstract

The invention discloses a thermistor element, comprising a first conductive member, a second conductive member and a high polymer material layer overlapped between the first conductive member and the second conductive member. The polymer material layer has characteristic of positive temperature coefficient, and comprises at least a crystalline polymer and at least one conductive filler scattered in the crystalline polymer; and the conductive filler has volume resistance value less than 500m ohm, and accounts for 72%-96wt% of the high polymer material layer. The thermistor element has an element area value, and a value of a corresponding holding current at 60 DEG C divided by the element area value is between 0.16A / mm<2> and 0.8A / mm<2>. A ratio of holding current at 60 DEG C to holding current at 25 DEG C of the thermistor element is between 65%-95%.

Description

technical field [0001] The present invention relates to a thermistor element, and in particular to a thermistor element with high holding current at high temperature. Background technique [0002] Since the resistance of the conductive composite material with a positive temperature coefficient (PositiveTemperatureCoefficient; PTC) or a negative temperature coefficient (NegativeTemperatureCoefficient; NTC) is sensitive to temperature changes, it can be used as a material for a current sensing element. Taking PTC as an example, since the resistance of PTC conductive composite materials can maintain an extremely low value at normal temperature, the circuit or battery can operate normally. However, when an over-current or over-temperature phenomenon occurs in the circuit or battery, its resistance value will instantly increase to a high resistance state (at least 10 2 Ω or more), and reduce the excessive current to achieve the purpose of protecting the battery or circuit compon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/02H01C7/06H02H9/02
Inventor 沙益安罗国彰苏聪敏
Owner POLYTRONICS TECH