Automatic restart charging control method for vehicle-mounted charger

Abstract

The invention discloses an automatic restart charging control method for a vehicle-mounted charger, and the method comprises the following steps of: waking up the vehicle-mounted charger when the vehicle-mounted charger detects a slow charging connection signal in a dormant state of a whole electric vehicle; utilizing the vehicle-mounted charger to wake up a vehicle control unit, and performing self-inspection and waking up a battery management system by the vehicle control unit; detecting the duty ratio of a CP signal by using the vehicle-mounted charger, if the CP signal does not exist, entering a whole vehicle fault state, otherwise, detecting the input voltage of a slow charging gun by using the vehicle-mounted charger; if the input voltage of the slow charging gun ranges from 170V to275V, conducting voltage and current information interaction on the vehicle-mounted charger and the battery management system; otherwise, entering a whole vehicle fault state; enabling the battery management system to acquire voltage and current information and judging whether the voltage and current information is within preset slow charging voltage and current ranges or not, if yes, utilizing the battery management system to send a charging request to the vehicle control unit, and entering a slow charging state; otherwise, entering a whole vehicle fault state.

Description

technical field [0001] The invention relates to the technical field of electric vehicle charging, in particular to a control method for automatically restarting charging of a vehicle-mounted charger. Background technique [0002] The automatic restart charging described in this article refers to the automatic start-up to enter the slow charging state after the power supply disappears during the slow charging process. At present, the electric vehicle in the prior art is slowly charged through the on-board charger, and it takes about 8 hours to complete the charging. Although the existing AC mains power is very stable, power outages will inevitably occur during the slow charging process. When there is a power failure, the electric vehicles in the prior art need to re-plug the slow charging gun before re-entering the charging process, otherwise the charging will be terminated. In some sites with unreliable power supply or those who use household electricity for slow charging,...

AI Technical Summary

Problems solved by technology

In some sites with unreliable power supply or those who use household electricity for slow charging, there will inevitably be power outages. The slow charging in the prior art has the following problems: first, it is inconvenient for car owners to operate, and second, the battery is not fully charged frequently. status

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