A low-voltage battery charging method and system, controller, and vehicle

Abstract

The invention provides a low-voltage battery recharging method and system, a controller and a vehicle. The method is applied to the low-voltage battery recharging system connected to a gateway of the vehicle through a vehicle body bus. The method comprises the steps that under the condition that the vehicle is stationary and vehicle doors are locked, the low-voltage battery recharging system is periodically started according to a preset cycle, so that the low-voltage battery recharging system detects whether the low-voltage battery of the vehicle is in a to-be-recharged state, and the low-voltage battery is used for supplying power for electrical appliances of the vehicle; when the low-voltage battery is in the to-be-recharged state, a recharging request is sent to a vehicle controller of the vehicle; and after receiving the feedback of the recharging request from the vehicle controller, the vehicle controller controls a power battery high-voltage relay of the vehicle to be closed, so that a power battery of the vehicle performs recharging on the low-voltage battery.

Description

Technical field [0001] The present invention relates to the technical field of automobiles, in particular to a low-voltage battery charging method and system, a controller, and automobiles. Background technique [0002] With the rapid development of automobile technology, new energy vehicles, mainly electric vehicles, have gradually opened up the market and entered people's lives. An electric vehicle includes a power battery that provides a power source and a low-voltage battery used to power the entire vehicle's electrical appliances. When the low-voltage battery is exhausted, the entire vehicle's electrical appliances will not be used. In the prior art, there are some battery management systems for controlling the power battery of an electric vehicle to charge the low-voltage battery. However, the battery management system in the prior art usually charges the low-voltage battery when the car is running, and does not consider the power consumption caused by the static power con...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a low-voltage battery supplementary power method, system, controller, and automobile, the purpose of which is to solve the battery management system in the prior art, without considering the power consumption caused by the static power consumption of the low-voltage battery when the automobile is locked for a long time Issues that consume and do not make a specific analysis of high-voltage safety scenarios

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