Miniature liquid metal switch with flexible structure

Abstract

The invention discloses a miniature liquid metal switch with a flexible structure. The miniature liquid metal switch comprises a base body, an upper liquid storage tank, a lower liquid storage tank, liquid metal, a liquid metal flow channel, an air flow channel, a top surface sealing thin film, a bottom surface sealing thin film, a side surface sealing thin film and an external electrode. The invention further provides a control method of the miniature liquid metal switch with the flexible structure. A high-elasticity matrix can be extruded through an external mechanical stress to enable the liquid metal to move for communicating with a circuit; and rapid circuit breaking can be realized through automatic springback of a high-elasticity matrix material and surface tension contraction of the liquid metal. The liquid metal is used as a conducting medium, and no contact resistor exists, so that electric repulsive force under a normal rated, short-circuit or lightning impulse current can be avoided, and meanwhile, the service life problem of an existing solid-state metal contact switch due to bouncing, fusion welding, ablation and the like is also favorably solved. The miniature liquidmetal switch is simple in structure, small in size and good in on-off performance, and can be applied to power on-off occasions of circuits.

Description

technical field [0001] The disclosure relates to a micro field, in particular to a micro liquid metal switch with a flexible structure. Background technique [0002] In recent years, with the development of large-capacity and high-power in the fields of national defense and civil communication and control, system circuits have put forward higher requirements for switch performance. On the one hand, the improvement of system capacity requires the circuit switch to have greater breaking capacity and ensure a higher service life; on the other hand, the improvement of system control performance depends on the rapid opening and closing of the switching device. [0003] For a traditional mechanical microswitch, the realization of its switching function depends on the compression and pull of an external mechanical device (usually a spring and other components) relative to a solid contact. The opening and closing times of mechanical switches depend on the speed of movement of the m...

AI Technical Summary

Problems solved by technology

The mechanical wear and bouncing problems caused by the high-speed movement of the solid contact seriously affect the service life of the switch

When the system capacity is increased, the increase of the voltage level is more likely to cause serious contact ablation and material transfer problems in the opening and closing bounce, which greatly reduces the life and stability of the switchgear

At the same time, the speed of movement of the mechanical contacts limits the breaking time of the switch

The contact resistance of the solid contact is large, which increases the line loss

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