Vehicle circuit protection device and protection method of vehicle circuit

Abstract

A vehicle circuit protection device comprises a shell (1), a circuit sampling unit, a main control unit, a fixed bolt (10) and a safety piece (11), wherein the circuit sampling unit is arranged on a power line of a whole vehicle electrical equipment load (3), and the safety piece is normally connected with a storage battery (12), and can be used for supplying power for a whole vehicle by the fixed bolt (10). The vehicle circuit protection device is characterized by further comprising a relay (8) which is respectively connected with a main control chip (7) and the fixed bolt (10), wherein the current sampling unit is further respectively connected with the fixed bolt (10) and the main control chip, and the main control chip (7) can be used for collecting a switch signal of a starting switch (2) and a current signal of the current sampling unit so as to control the action of the relay (8).

Description

technical field [0001] The invention belongs to the technical field of automatic control and relates to an automobile circuit protection device. Background technique [0002] Now many cars are equipped with electromagnetic power switch or mechanical power switch, the purpose of which is to cut off the power supply of the vehicle when the circuit of the vehicle fails (short circuit, fire, etc.), so as to avoid vicious problems such as vehicle burning and personal injury Event happens. However, the existing main power switch needs to be operated by human beings, and the power supply of the whole vehicle cannot be automatically cut off at the first time when a fault occurs. It was found that when the short-circuit continued to catch fire, it was too late for the driver to operate the electromagnetic power main switch or the mechanical main switch to disconnect the power supply of the vehicle, and at least the components around the short-circuit point would be burned. If there ...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to propose an auto circuit protection device that works automatically and can respond in time. The device internally uses a current transformer to detect whether there is a short circuit. Vehicle power supply, mainly to solve the problem of vehicle fire caused by the current main switch is manually operated to cut off the vehicle power supply, or the response time of vehicle insurance is slow, and the vehicle power supply cannot be automatically cut off in time when there is a short circuit

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