Shanghai Changyuan Wayon Circuit Protection Co., Ltd.

Cyg Wayon Circuit Protection Co., Ltd.

Yong Fang

Yutang Liu

Quanquan Yang

Jun Wang

Wei Wang

Zhengping Liu

Rong Fan

Daohua Gao

Guochen Wu

Xuan Gong

Lifeng Liu

A circuit protection assembly has a protection element having a positive temperature coefficient of resistance and consisting of a polymer-based conductive composite material layer tightly clamped and fixed between two metal electrodes and a copper clad laminate having a through hole in a middle thereof, wherein the protection element is provided in the through hole, the copper clad laminate serves as a substrate for the circuit protection assembly and has an adhesive layer on an upper surface and a lower surface thereof, so as to cover the protection element in a space formed by the copper clad laminate and the upper and the lower adhesive layers. The protection element having a positive temperature coefficient of resistance is electrically connected to a protected circuit via a conductive part.

Circuit protection assembly

A macromolecule-based conductive composite material and a PTC element. The macromolecule-based conductive composite material comprises: a macromolecule base material, having a volume fraction of the macromolecule base material of 20%-75%; a conductive filler with a core-shell granule structure and dispersed in the macromolecule base material, having a volume fraction of 25%-80%; and a coupling agent, being a titanate coupling agent and accounting for 0%-5% of the volume of the conductive filler. The PTC element prepared by using the macromolecule-based conductive composite material comprises at least two metal electrode plates ('), a macromolecule-based conductive composite material () being closely combined with the metal electrode plates (&#x2032;). The PTC element prepared from the macromolecule-based conductive composite material has the advantages of low room-temperature resistivity, outstanding weather durability, good voltage resistance and good resistor repeatability.

Macromolecule-based conductive composite material and PTC element

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Shanghai, China

Yong Fang