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Component with over-voltage over-current protective effect and manufacturing process of the same

A technology of overvoltage and overcurrent protection and manufacturing process, which is applied in the direction of overvoltage protection resistors, electrical components, varistors, etc., can solve the problems of large accidents and slow protection, reduce costs, save energy consumption, avoid The effect of overcurrent fire problems

Inactive Publication Date: 2016-03-09
天津凯华绝缘材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PPTC thermistor can be used as an overcurrent protection element in electronic circuits, but it is powerless against transient overcurrent caused by transient surge voltage, and it has a higher probability of accidents caused by too slow protection in low temperature environments

Method used

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  • Component with over-voltage over-current protective effect and manufacturing process of the same
  • Component with over-voltage over-current protective effect and manufacturing process of the same
  • Component with over-voltage over-current protective effect and manufacturing process of the same

Examples

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Effect test

Embodiment 1

[0031] An overvoltage and overcurrent protection component and its manufacturing process, including varistor and PPTC electrode slurry, the composition and steps are as follows:

[0032] Slurry composition is in the present embodiment:

[0033] Liquid epoxy resin E-51, the number of parts by mass is 100 parts;

[0034] Conductive filler carbon fiber, 20 parts;

[0035] Flake silver powder, 5 parts;

[0036] Low-molecular-weight polyamide, content 50 parts;

[0037] Curing accelerator 2 ethyl-4 methyl imidazole (2E4MZ), 2 parts;

[0038] Thinner polypropylene glycol diglycidyl ether, 10 parts,

[0039] Coupling agent KH550, 3 parts,

[0040] Flame retardant aluminum hydroxide, 4 parts,

[0041] Antioxidant DOPO, 1 serving

[0042] The process of combining the above-mentioned PPTC electrode slurry with the piezoresistor to make a circuit protection component includes the following steps:

[0043] (1) Clean the general-purpose zinc oxide varistor sheet (model: diameter an...

Embodiment 2

[0049] An overvoltage and overcurrent protection component and its manufacturing process, including varistor and PPTC electrode slurry, the composition and steps are as follows:

[0050] In this embodiment, the slurry components are mainly

[0051] Polyurethane acrylate oligomer (PUA) 50 parts

[0052] Mixture of methyl methacrylate 50 parts

[0053] Conductive particle carbon fiber, the content is 20 parts;

[0054] Flake silver powder, 5 parts;

[0055] Photoinitiator benzoin butyl ether, 3 parts;

[0056]Thinner Dioctyl phthalate (DOP), 10 parts,

[0057] Coupling agent KH550, 3 parts;

[0058] Flame retardant aluminum hydroxide, 4 parts,

[0059] Antioxidant DOPO, 1 serving

[0060] The process of combining the above-mentioned PPTC electrode slurry with the piezoresistor to make a circuit protection component includes the following steps:

[0061] (1) Clean the general-purpose zinc oxide varistor sheet (model: diameter and thickness Φ14 / 1.8mm, varistor voltage V1mA...

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Abstract

The invention discloses a component with an over-voltage over-current protective effect. The component comprises a piezoresistor and PPTC electrode pastes, two pins, and an epoxy resin encapsulation layer; the surfaces of electrodes at two sides of the piezoresistor are coated with the PPTC electrode pastes with the over-current protective effect, and the pins are respectively adhered on the surfaces of the electrode pastes at two sides through pressing, the piezoresistor is encapsulated through the epoxy resin encapsulation layer after the operation of middle-low temperature thermocuring or ultraviolet irradiation curing, and then plays the over-voltage over-current protective effect through the thermocoupling effect. A circuit protective element provided by the invention is used for combining the PPTC electrode paste with the piezoresistor and playing the over-current over-voltage protective effect, the piezoresistor over-current fire problem and the slow movement problem of the PPTC under low temperature are effectively avoided.

Description

technical field [0001] The invention relates to the field of protective electronic components, in particular to a circuit protection component combined with a piezoresistor and PPTC electrode paste, especially an overvoltage and overcurrent protection component and a manufacturing process thereof. Background technique [0002] As an overvoltage protection device, the varistor has the advantages of fast response speed, no freewheeling, small residual voltage ratio, large flow rate, small leakage current and wide product selection voltage range. Especially the varistor made of zinc oxide material has more prominent advantages. However, due to the negative temperature coefficient (NTC) characteristics of zinc oxide varistors, if they often encounter transient overvoltage or component aging and other reasons, the leakage current will increase, and the temperature of the ceramic piece will increase, causing the resistance value to decrease, and the Leakage current increases furt...

Claims

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Application Information

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IPC IPC(8): H01C7/12H01C17/02H01C17/22H01B1/12
CPCH01B1/12H01C7/12H01C17/02H01C17/232
Inventor 任志成李静王硕阳蔡金跃王典杰
Owner 天津凯华绝缘材料股份有限公司
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