Management method and device for electric automobile low-tension battery

Abstract

The invention discloses a management method and device for an electric automobile low-tension battery. The management method comprises steps that a power supply management system is regularly wakenedup; voltage detection is conducted to the low-tension battery by the wakened-up power supply management system and whether electricity supply is required is detected; if required, a mode of the electric automobile is detected; if the mode is a trickle-charge mode, a vehicle-mounted battery charger is started, so electricity can be supplied to the low-tension battery by the external power supply; if the mode is a driving mode, a DCDC controller is started and electricity is supplied to the low-tension battery by a power battery; through regular detection to the voltage of the low-tension battery, whether electricity supply is required can be determined according to a detection result; the low-tension battery of the electric automobile can be automatically powered and problems of low-tensionbattery damage and short service life due to long-time electricity shortage when electricity cannot be automatically supplied to the low-tension battery; different electricity supply modes are employed upon different modes; low-tension battery can be effectively protected; and service life of the low-tension battery can be prolonged.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a method and device for managing low-voltage batteries of electric vehicles. Background technique [0002] At present, environmental protection and energy issues are increasingly concerned. In order to cope with the environmental and energy crises, the development and large-scale use of electric vehicles has become an inevitable trend. With the development of intelligent electric vehicles, the relevant controllers are in a state of incomplete dormancy The number of solutions gradually increases, which leads to an increase in the risk of low-voltage battery power loss in the vehicle; the vehicle intelligence realizes the management of the low-voltage power supply battery in the state of vehicle wake-up, which cannot be guaranteed under long-term static conditions; as the power loss further deteriorates, it is easy to The low-voltage battery is completely damaged and the service li...

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a low-voltage battery management method and device for electric vehicles, aiming to solve the problems that the low-voltage batteries of electric vehicles cannot be automatically recharged and have a short service life.

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