Protection circuit of electric vehicle charging controller

Abstract

The invention discloses a protection circuit of an electric vehicle charging controller. The charging process can be safe and stable by means of the protection circuit. The protection circuit comprises the alternating current input end, the alternating current output end, an on-off device, an overvoltage and undervoltage sampling circuit, an overvoltage comparison circuit, an undervoltage comparison circuit, an overvoltage and undervoltage time delay restoring circuit, an electric leakage sampling circuit, an electric leakage comparison circuit, an electric leakage trigger retaining circuit, an overcurrent comparison circuit, an overcurrent time delay trigger circuit, an overcurrent time delay restoring circuit, a short circuit comparison circuit, a clock pulse signal producing circuit, a clock pulse signal sampling circuit, a clock pulse signal first comparison circuit and an on-off driving circuit. The on-off driving circuit drives the on-off device according to signals output by the overvoltage and undervoltage time delay restoring circuit, the electric leakage trigger retaining circuit, the overcurrent time delay trigger circuit and the clock pulse signal first comparison circuit to connect or disconnect the alternating current input end with the alternating current output end. The protection circuit is particularly suitable for being used in cooperation with an automobile charging controller.

Description

technical field [0001] The invention relates to a circuit structure, in particular to a pure hardware circuit structure, and in particular to a protection circuit for a charging controller of an electric vehicle. Background technique [0002] At present, electric scooters are in the ascendant, and electric vehicles are booming even more. As various electric vehicles continue to enter ordinary people's homes, the problem of imperfect charging facilities is becoming more and more prominent, which seriously restricts the popularization of electric vehicles, especially electric vehicles. The so-called imperfect charging facilities, one means that there are too few charging stations and charging piles for charging electric vehicles, and the geographical distribution is extremely uneven; the other means that the design of charging equipment, that is, charging controllers is not reasonable. Here, only the charging controller is discussed. The current charging controller usually on...

AI Technical Summary

Problems solved by technology

The so-called imperfect charging facilities, one means that there are too few charging stations and charging piles for charging electric vehicles, and the geographical distribution is extremely uneven; the other means that the design of charging equipment, that is, charging controllers is not reasonable enough

Here, only the charging controller is discussed. The current charging controller usually only has some simple protection circuits such as over-current and over-voltage. During the working process of the charging controller, the degree of leakage and over-current cannot be checked. And many other abnormal situations are fully monitored; moreover, once a fault occurs, the entire charge controller has to be restarted, which is very inconvenient to use

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