Electric quantity display circuit of electric vehicle

Abstract

The invention discloses an electric quantity display circuit of an electric vehicle. The electric quantity display circuit comprises a circuit interface which is connected with a power supply of the electric vehicle, wherein the electric interface is connected with a voltage stabilizer, the circuit interface is connected with a high-voltage display circuit, a medium-voltage display circuit, a low-voltage display circuit and an under-voltage display circuit in parallel, the high-voltage display circuit is internally connected with a high-voltage protection resistor and a high-voltage indicator element in series, the medium-voltage display circuit is internally connected with a medium-voltage protection resistor and a medium-voltage indicator element in series, the low-voltage display circuit is internally connected with a low-voltage protection resistor and a low-voltage indicator element in series, and the under-voltage display circuit is internally connected with an under-voltage protection resistor and an under-voltage indicator element in series; the high-voltage display circuit, the medium-voltage display circuit, the low-voltage display circuit and the under-voltage display circuit are respectively connected with an anti-vibration module which mainly consists of a voltage comparator. The electric quantity display circuit is simple in connection, the electric quantity can be displayed in a segmenting manner, and the frequent switching of two adjacent display sections can be prevented.

Description

technical field [0001] The invention relates to the technical field of electric vehicle manufacturing, in particular to a power display circuit of the electric vehicle. Background technique [0002] With the improvement of living standards, electric vehicles have become the most common means of transportation in people's daily life. Electric vehicles have the advantages of light driving, convenient parking, and low price. Electric vehicles use batteries as the power source for driving. In order to facilitate the driver to understand the storage status of the batteries, a power display window will be set on the dashboard of the electric vehicle. [0003] The initial power display is only divided into high-voltage state and low-voltage state. Later, in order to better display the power, the power display is divided into high-voltage state, medium-voltage state and low-voltage state. Later, the under-voltage state was added; the high-voltage state is the state of suffici...

AI Technical Summary

Problems solved by technology

[0004] Nowadays, LED indicator lights are generally used to display the power status in segments, but the current power display has the following shortcomings. When the power is near the switching point, the indicator light will display abnormally and repeatedly oscillate. Switching between states differently, or displaying under-voltage and displaying power at the same time, not only cannot correctly reflect the real power of the battery, but frequent switching between indicator lights can easily cause damage to the indicator lights, increasing the frequency of electric vehicle maintenance and cost

Therefore, its structure needs to be further improved

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