Control method and device for electric quantity of low-voltage accumulator

Abstract

The invention provides a control method and device for the electric quantity of a low-voltage accumulator. After the voltage value of the low-voltage accumulator is obtained, if the voltage value of the low-voltage accumulator is lower than a preset voltage threshold, low-voltage warning information is sent to user terminal equipment; after electrifying allowance information sent by the user terminal equipment according to the low-voltage warning information is obtained, a control command is sent to a high-voltage power battery, and the high-voltage power battery is controlled to charge the low-voltage accumulator. Through the adoption of the control method for the electric quantity of the low-voltage accumulator disclosed by the invention, when the voltage value of the low-voltage accumulator is lower than the preset voltage threshold, the low-voltage accumulator is charged by the high-voltage power battery, so that the voltage of the low-voltage accumulator is kept balanced, and the normal start of low-voltage electric equipment including a vehicle electronic control unit and the like is guaranteed.

Description

technical field [0001] The invention relates to the field of electric quantity control of automobiles, in particular to a method and device for controlling electric quantity of a low-voltage storage battery. Background technique [0002] Vehicle low-voltage battery refers to the lead-acid battery that provides low-voltage power supply for low-voltage electrical equipment such as vehicle electronic control unit (Electronic Control Unit, referred to as ECU, also known as "driving computer", "vehicle computer"). When the low-voltage battery is not in use, the acidic electrolyte Sinking will cause a potential difference between the plate and the lower part, causing self-discharge. If the low-voltage battery discharges seriously, it will affect the power supply to the vehicle's low-voltage electrical equipment and affect the normal start of the vehicle, especially when the vehicle is left unused for a long time. Some of the electronic control units in the vehicle are still consum...

AI Technical Summary

Problems solved by technology

[0002] Vehicle low-voltage battery refers to the lead-acid battery that provides low-voltage power supply for low-voltage electrical equipment such as vehicle electronic control unit (Electronic Control Unit, referred to as ECU, also known as "driving computer", "vehicle computer"). When the low-voltage battery is not in use, the acidic electrolyte Sinking will cause a potential difference between the plate and the lower part, causing self-discharge. If the low-voltage battery discharges seriously, it will affect the power supply to the vehicle's low-voltage electrical equipment and affect the normal start of the vehicle, especially when the vehicle is left unused for a long time. Some of the electronic control units in the vehicle are still consuming the discharge current of the low-voltage battery, which leads to the existence of vehicle dark current. The low-voltage battery of the vehicle is likely to be over-discharged, which will affect the power-on of the low-voltage power supply equipment when the vehicle is ready to start, and cause the vehicle to fail. start up

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