Vehicle and charging control method and system used for vehicle low-voltage battery

Abstract

The invention discloses a vehicle and a charging control method and system used for a vehicle low-voltage battery. The charging control method comprises the following steps that after the vehicle enters a still standing state, a vehicle controller enters a low power consumption timing mode and starts timing; when the timed time reaches the wake-up time stored in the vehicle controller, the vehicle controller is woken up, the current voltage of the low-voltage battery is detected through the vehicle controller, and whether the current voltage of the low-voltage battery is smaller than or equal to the preset lower electric quantity voltage threshold value or not is judged; and if the current voltage of the low-voltage battery is smaller than or equal to the preset lower electric quantity voltage threshold value, the vehicle controller controls a DC / DC converter to work so that the low-voltage battery can be charged. According to the charging control method used for the vehicle low-voltage battery, when the timed time reaches the wake-up time, the current voltage of the low-voltage battery is judged so as to determine whether charging is conducted, and thus the low-voltage battery can be charged according to the actual demand; and in addition, the still standing loss of the vehicle can be reduced.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a charging control method for a low-voltage storage battery of a vehicle, a charging control system for a low-voltage storage battery of a vehicle and a vehicle. Background technique [0002] At present, intelligence and electrification are the development trend of automobiles. In order to realize the driving control and multiple intelligent functions of automobiles, multiple electronic control systems are introduced. Therefore, the safety and reliability of low-voltage power supply systems are becoming more and more important. [0003] Usually, in order to achieve intelligent control, after the vehicle is powered off, multiple electronic control systems are still in a low-power working state and monitor the status of the vehicle at all times. As a result, the static loss of the vehicle increases, so the The status monitoring of vehicle low-voltage control sources (such as low-v...

AI Technical Summary

Problems solved by technology

[0005] Regularly start power replenishment work: do not monitor the power state of the low-voltage battery, and determine the start time based on experience values. When the battery is rapidly depleted, it is impossible to obtain timely power replenishment, or when the battery power is high, the power replenishment function is still activated

[0006] Intelligent charging time is fixed: the power state of the low-voltage battery is not monitored during the charging process, and the charging time is fixed, and there is a defect that the charging time is too long or too short

Images