Curie temperature classification method, device and system of thermistor
A thermistor and Curie temperature technology, applied in sorting and other directions, can solve problems such as poor power, poor batch, long test cycle, etc., and achieve the effect of improving efficiency
Active Publication Date: 2020-09-18
XIAOGAN HUAGONG GAOLI ELECTRONICS
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Problems solved by technology
[0003] When the chips of the same size are produced, if the on-site control fails, it is very easy to have different Curie point thermistors mixed, resulting in poor batches. Generally, after the thermistors are mixed with Curie points, there will be poor power or poor voltage resistance during use. Performance defects, in order to distinguish different Curie point thermistors, the contact method is generally used to test the surface temperature of the thermistor when it is working, but this method has a long test cycle and low efficiency
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[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0027] At present, the traditional Curie temperature resolution method of the thermistor usually uses the contact method to test a single thermistor respectively; specifically, it can be realized by the following steps:
[0028] 1. Use a bamboo jig to clamp the thermistor chip to be tested to the test jig, and fix it so that the top and bottom fully contact the chip electrodes.
[0...
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The invention provides a Curie temperature classification method, device and system for thermistors. The Curie temperature classification method comprises the steps that the thermistors to be classified are sorted into corresponding sub-scales according to the resistance values of the thermistors to be classified and preset resistance gears; the resistance gears comprise the sub-gears; a preset voltage is continuously applied to the thermistors belonging to the same sub-gears for a preset time through a voltage applying device; the surface temperature of the thermistors in the same sub-scale is measured through a thermal imager after the preset voltage is applied for a preset time period; according to the preset temperature range and surface temperature, the Curie temperature category to which the thermistors belong is determined; the temperature range includes a plurality of sub-ranges; and one sub-range corresponds to a Curie temperature category. The Curie temperature classificationmethod, device and system improve the Curie temperature distinguish efficiency of the thermistors.
Description
technical field [0001] The invention relates to the technical field of thermistor classification, in particular to a Curie temperature classification method, device and system for thermistors. Background technique [0002] PTC (Positive Temperature Coefficient, positive temperature coefficient) ceramic is a barium titanate-based ceramic material, the resistance value is relatively small below a certain temperature point (called "Curie temperature"), about several hundred ohms to several kilo ohms. Once the Curie temperature is reached and exceeded, the resistance increases dramatically by several orders of magnitude, hence the name "thermistor" material. Components made of this material are widely used in heating devices, circuit overcurrent protection and other fields. [0003] When the chips of the same size are produced, if the on-site control fails, it is very easy to have different Curie point thermistors mixed, resulting in poor batches. Generally, after the thermist...
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IPC IPC(8): B07C5/34
Inventor 晏秋实吴周立廖毅杨成杨航邹勇
Owner XIAOGAN HUAGONG GAOLI ELECTRONICS