High-response-speed fuse

Abstract

A high-response-speed fuse comprises an upper cover and a lower housing. A conductive board is arranged between the upper cover and the lower housing. An insulating arc extinguishing diaphragm is arranged between the conductive board and the upper cover. The upper cover is internally provided with a chamber. The chamber is internally provided with a gas generating device. The lower surface of theconductive board at a position relative to one side of the lower opening of the chamber is provided with a breaking groove. A front arc extinguishing gate plate and a back arc extinguishing gate plateare separately arranged at the front part and the back part in the lower housing. An accommodating chamber for falling after breaking of the conductive board is formed between the front arc extinguishing gate plate and the back arc extinguishing gate plate. The lower surface of the conductive board in two ends of the upper opening of the accommodating chamber is provided with a breaking groove which extends across the width of the current conducting plate. A buffering chamber is arranged among the front arc extinguishing gate plate, the back arc extinguishing gate plate and the bottom plate of the lower housing. The back arc extinguishing gate plate is communicated with outside through a gas outlet which is arranged on the lower housing. According to the high-response-speed fuse, the conductive board is broken through a gas impact force for realizing a circuit switching-off purpose. Furthermore the high-response-speed has advantages of high response speed and high safety performance.

Description

technical field [0001] The invention relates to a fuse, in particular to a fuse structure that can quickly respond and cut off the main circuit in a fuse protection device of a main circuit when a new energy vehicle or the like suffers from an impact or other accidents. Background technique [0002] Fuses are commonly used electrical components that play a protective role in circuits. Generally, when the fuse circuit is overloaded, the overload current causes the melt to heat up and quickly blows the fuse to disconnect the circuit to realize circuit protection. With the development and popularization of new energy vehicles, new energy vehicles use a large number of battery packs, which involve the main circuit for powering new energy vehicles. In the main circuit of the new energy vehicle, the existing fuse that fuses the fuse by heating is used. When the new energy vehicle is hit by other sudden accidents, due to the short time, the ordinary fuse is too late to fuse and di...

AI Technical Summary

Problems solved by technology

In the main circuit of the new energy vehicle, the existing fuse that fuses the fuse by heating is used. When the new energy vehicle is hit by other sudden accidents, due to the short time, the ordinary fuse is too late to fuse and disconnect the circuit to make the new energy The car loses power, which leads to safety hazards or expands the accident, causing serious consequences

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