A kind of electric vehicle charging management control method

Abstract

The invention relates to the field of electric control of electric automobiles, and aims to provide a charging management control method for an electric automobile capable of effectively avoiding lackof electricity of a low voltage storage battery. The technical scheme is that the charging management control method for the electric automobile includes the following steps: a vehicle controller automatically enters a charging mode; a BMS judges a type of a charging pile; when the charging pile is a direct current charging pile, a low voltage supplementary electricity voltage of the direct current charging pile is measured; when the low voltage supplementary electricity voltage of the direct current charging pile is identical to a rated voltage of the low voltage storage battery of the electric mobile, the low voltage battery is directly charged by a low voltage supplementary electricity interface of the direct current charging pile; and when the low voltage supplementary electricity voltage of the direct current charging pile is different from the rated voltage of the low voltage storage battery of the electric mobile, a direct current converter of the electric automobile is startedand converts high-voltage power of a high-voltage power storage battery into low-voltage power corresponding to the low-voltage storage battery, and electricity is supplemented to the low-voltage storage battery. The charging management control method enables the lack of electricity of the low voltage storage battery to be avoided.

Description

technical field [0001] The invention relates to the field of electronic control of electric vehicles, in particular to a charging management and control method for electric vehicles. Background technique [0002] With the continuous aggravation of energy crisis and environmental problems, electric vehicles using new energy sources have received more and more attention. Electric vehicles can be charged by direct current or alternating current. DC charging is to charge electric vehicles directly through DC charging piles; AC charging is to install on-board chargers on electric vehicles, and the on-board charger converts the alternating current transmitted by the AC charging piles into direct current to charge electric vehicles. [0003] The electric vehicle is equipped with a low-voltage battery that supplies power to the control system and a high-voltage power battery that supplies power to the drive system. When the electric vehicle is charged through a DC charging pile, th...

AI Technical Summary

Problems solved by technology

But the low-voltage batteries of different models of electric vehicles may have different rated voltages, such as: 12V or 24V; When charging, the low-voltage battery is replenished, which causes the low-voltage battery to lose power

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