US 11,688,577 B2 · High-voltage direct-current thermal fuse

Abstract

A high-voltage direct-current thermal fuse includes one or more fusible components each having two fusible alloy support arms, a fluxing agent, a fusing cavity, two pins, and an insulation block. Two fusible alloy support arms are arranged opposite, and the fusible component is U-shaped. The fusible component and the fluxing agent are sealed within the fusing cavity. The two pins are respectively connected to the two fusible alloy support arms. The insulation block is arranged between the two fusible alloy support arms and separates the two pins. A volume ratio of the fluxing agent to the fusing cavity is approximately 50% or less, preferably, 10%-50%. The number of the one or more fusible components is at least two, and the at least two fusible components are arranged separately. The thermal fuse can avoid the burst and quickly cut off the current, which provides effective thermal protection for a circuit.

Claims11

Dependent claims

A high-voltage direct-current thermal fuse, comprising:

a left pin;
a right pin;
at least two fusible components each having two fusible alloy support arms, wherein one fusible alloy support arm is connected to the left pin, and the other fusible alloy support arm is connected to the right pin, wherein the two fusible alloy support arms are arranged opposite from each other;
a fluxing agent;
a fusing cavity, wherein the at least two fusible components and the fluxing agent are sealed within the fusing cavity;
and
an insulation block, wherein the insulation block is arranged between the two fusible alloy support arms and separates the left pin and the right pin;
wherein a volume ratio of the fluxing agent to the fusing cavity is approximately 50% or less, and
wherein a non-metallic partition film is arranged inside the fusing cavity to divide the fusing cavity into an inner cavity and an outer cavity, the inner cavity and the outer cavity are mutually sealed, the fluxing agent is arranged inside the inner cavity, and an arc-extinguishing medium is arranged inside the outer cavity.

6 more elements

Dependencies are inferred from the claim text.

High-voltage direct-current thermal fuse

Life of this patent

High-voltage direct-current thermal fuse

Life of this patent

Abstract

Claims11