Power supplementing method and device during power shortage of automobile storage battery, vehicle and storage medium

By detecting the state of charge and voltage signals in the electric vehicle's sleep mode, and utilizing the charging module and VCU software within the same controller, precise, energy-saving, and safe high-efficiency charging is achieved, solving the problems of charging failure and energy loss when the low-voltage battery of an electric vehicle is depleted.

CN121848933APending Publication Date: 2026-04-14CHERY AUTOMOBILE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-06
Publication Date
2026-04-14

AI Technical Summary

Technical Problem

In the existing technology, it is difficult to solve the problems of charging failure, timing failure, frequent requests, power loss and battery safety when the low-voltage battery of an electric vehicle is depleted.

Method used

When the car enters sleep mode, the system detects the state of charge and voltage signals to determine whether the preset power replenishment conditions are met. Using the power replenishment function module and VCU software within the same controller, the system directly calls the high-voltage power-on service. It adopts segmented management and active wake-up mechanism to avoid the entire vehicle waking up at the same time. Combined with NVM storage and EEPROM counting mechanism, it ensures accurate wake-up and power saving.

Benefits of technology

It achieves a precise, energy-saving, safe, and efficient power replenishment process, reduces power consumption, improves the reliability of power replenishment, and avoids power outages caused by accidental factors.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to an electricity supplementing method and device during electricity shortage of an automobile storage battery, an automobile and a storage medium, and the method comprises the steps that under the condition that the automobile enters a sleep mode, the charge state and a voltage signal of the automobile storage battery are detected; judging whether the storage battery of the vehicle meets a preset charging condition or not; if the storage battery of the vehicle meets the preset charging condition of the vehicle, generating at least one charging action based on the charging request of the storage battery of the vehicle, and controlling the vehicle to execute the at least one charging action of the vehicle so as to convert the battery electric energy meeting the preset high-voltage condition into the battery electric energy meeting the preset low-voltage condition; and according to the battery electric energy, meeting the preset low-voltage condition, of the vehicle, an automobile storage battery, meeting the preset charging condition, of the vehicle is charged. Therefore, the problems of difficulty in meeting user requirements, failure in charging timing, frequent request, electric energy loss, unsafe battery and the like when the vehicle is charged through an external charger in the prior art are solved.
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