Electric vehicle voltage converting circuit

Abstract

The invention discloses an electric vehicle voltage converting circuit and is aimed at providing the electric vehicle voltage converting circuit capable of automatically controlling electric power transmission of a power source and reducing electricity waste. Key points of a technical solution of the electric vehicle voltage converting circuit are that the electric vehicle voltage converting circuit comprises a storage battery, a voltage converter and a head lamp that are orderly connected; the electric vehicle voltage converting circuit is characterized in that the voltage converter comprises an input end VIN, a first MOS transistor, a second MOS transistor, an electric inductor, an output end VOUT and a PWM output module; the PWM output module comprises an HO lead pin, an SW lead pin, an LO lead pin and a CS lead pin; the HO lead pin is connected with a grid electrode of the first MOS transistor, and the LO lead pin is connected with a grid electrode of the second MOS transistor; the SW lead pin is connected with a source electrode of the first MOS transistor, a drain electrode of the second MOS transistor and one end of the inductor; a drain electrode of the first MOS transistor is connected with the input end VIN, a source electrode of the second MOS transistor is connected with the CS lead pin and a grounding end, the other end of the inductor is connected with the output end VOUT, the output end VOUT is also connected with an optical switch module, the optical switch module is coupled to a position between the head lamp and the output end VOUT, and on-off of the head lamp can be controlled according to ambient light rays.

Description

technical field [0001] The invention relates to the technical field of electric vehicle control, in particular to an electric vehicle voltage conversion circuit. Background technique [0002] At present, the Chinese patent with the notification number CN205430056U discloses a voltage conversion device for electric vehicles, including a PWM control circuit, a switch tube, a voltage feedback circuit, a current sampling circuit, and a power supply circuit. The power supply circuit is used to supply power to the PWM control circuit. The output terminal of the PWM control circuit is connected to the gate of the switch tube through the MOS tube drive circuit, the drain of the switch tube is connected to the power input terminal of the voltage converter, and the source of the switch tube is connected to the power output of the voltage converter An energy storage inductance is arranged between the ends, the input end of the voltage feedback circuit is connected to the power output e...

AI Technical Summary

Problems solved by technology

[0003] The power supply of an electric vehicle is generally a storage battery. Now the voltage specification of the storage battery is 72V. It needs to be converted to 12V for the headlights of the electric vehicle through a certain circuit. This voltage conversion can be realized in the prior art, but it is not There is no function to effectively detect the working status of the headlights. For special cases, such as: during the day, it is not necessary to turn on the headlights. Sometimes people forget to turn off the headlights after using them, so that the headlights remain on during the day. open, resulting in a waste of energy, especially a waste of battery power

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