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US 11,309,106 B2Granted
Device protected by PTC element
AssigneeLiffelfuse Japan G. K.
InventorsArata Tanaka, Keiichiro Nomura, Satoshi Sakamoto
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Abstract
The present invention provides an apparatus having a protecting element for protecting the apparatus in an emergency, wherein the protecting element is a polymer PTC element, the polymer PTC element has a polymer PTC member, and the polymer PTC member is formed from a polymer composition containing a polyvinylidene fluoride as a main component.
Claims19
An apparatus comprising a protecting element for protecting the apparatus in an emergency, wherein the protecting element is a polymer positive temperature coefficient (PTC) member comprising:
- a polymer PTC composition comprising polyvinylidene fluoride (PVDF) and one or more polymer components, the PVDF further comprising:
- a mass of at least 55% of the polymer PTC composition;
- an average molecular weight of between 5×103 and 1×106;
- and
- a crystallinity of between 30% and 60%;
- and
- an electrically conductive filler, wherein the electrically conductive filler is dispersed in the polymer composition;
- wherein the PTC member has a resistance change rate of between 0.74 and 0.89 after being immersed in oil for 200 hours.
5 more elements
Dependencies are inferred from the claim text.