US 12,755,914 B2 · Thermal cutoff device pellet composition

Abstract

The present disclosure relates to thermal cutoff device pellet composition. Provided is a pellet composition having enhanced aging performance, electrical performance, pellet output, pellet density and pellet crush strength for use in a thermally-actuated, current cutoff device. The solid thermal pellet composition comprises an organic compound having a low vapor pressure at room temperature, such as tetraphenylsilane. The thermal pellet composition comprising tetraphenylsilane can significantly improve interruption performance, pellet output, pellet density, pellet crush strength and aging performance of the thermal cutoff device.

Claims13

Dependent claims

A thermal cutoff device comprising:

a thermal pellet comprising tetraphenylsilane having a cutoff temperature (Tf) of greater than or equal to about 230° C. disposed in a housing;
a seal disposed in a portion of at least one opening of the housing to substantially seal the housing up to the cutoff temperature (Tf);
and
a current interruption assembly at least partially disposed within the housing that establishes electrical continuity in a first operating condition corresponding to an operating temperature of less than the cutoff temperature (Tf) of the thermal pellet, and that discontinues electrical continuity when the operating temperature exceeds the cutoff temperature (Tf).

1 more element

Dependencies are inferred from the claim text.

Facts

Application

18/207,779Filed 9 Jun 2023

Priority

CN 202210740312.028 Jun 2022

Published

US 2023/0420210 A128 Dec 2023

Granted

6 Oct 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

H01H 37/764
Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material:…
H01H 2037/769
Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material:…
H01H
Electric switches

Thermal cutoff device pellet composition

Life of this patent

Thermal cutoff device pellet composition

Life of this patent

Abstract

Claims13