Device for preventing automobile charging pile from catching fire on the basis of temperature change

Abstract

The invention relates to the technical field of traffic, and discloses a device for preventing an automobile charging pile from catching fire on the basis of temperature change. A movable cavity is fixedly connected to the inner wall of a shell, an air bag is fixedly connected to the inner wall of the movable cavity, a movable block is fixedly connected to the top of the air bag, and a dielectric plate is fixedly connected to the inner wall of the movable block. According to the device for preventing the automobile charging pile from being on fire on the basis of the temperature change, when current in the charging pile is overloaded to generate high-temperature fire, gas in the air bag is affected by temperature to absorb heat and expand; the air bag drives the movable block to move upwards; the movable block drives the dielectric plate to move; the relative area between the positive plate and the negative plate is changed to generate current; when the current exceeds the minimum resistance value of a piezoresistor, the piezoresistor electrifies an electric contact II, so that sodium azide powder filled in an elastic sheet reacts and is quickly decomposed to generate a large amount of nitrogen; and the elastic sheet expands to drive the movable rod and a conductive point to disconnect the power supply, so that the effect of performing power-off protection on the charging pile is achieved.

Description

technical field [0001] The invention relates to the technical field of transportation, in particular to a device for preventing fire at an automobile charging pile based on temperature changes. Background technique [0002] With the development and increase in the number of new energy vehicles, charging piles have also begun to be widely deployed. The role of charging piles is to provide charging services for electric vehicles. Its function is similar to that of fuel dispensers in gas stations, which can be fixed on the ground or walls. Installed in public buildings and residential area parking lots or charging stations, so that people can charge electric vehicles. [0003] However, the current charging piles on the market still have certain deficiencies in the working process. When the charging pile is working, its internal charger will generate a lot of heat when the current is overloaded, which is likely to occur under the influence of heat. The problem of short circuit,...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a device for preventing fire at the charging pile of automobiles based on temperature changes, which has the advantage of automatic fire extinguishing and solves the problem of fire at the charging pile and endangering personal safety

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