BMS wake-up control circuit and BMS wake-up control method

Abstract

The invention relates to the technical field of new energy automobile electronic circuits, in particular to a BMS awakening control circuit and a BMS wake-up control method. The circuit comprises a CC2 interface connected with a CC2 circuit in a charging gun during charging, and further comprises a pull-up current limiting circuit, a series resistance-capacitance circuit and a level conversion circuit; the pull-up current limiting circuit is connected with a power battery and the CC2 interface and is used for carrying out pull-up current limiting processing when the charging gun is inserted; the series resistance-capacitance circuit is connected with the pull-up current-limiting circuit and the level conversion circuit and is used for adjusting the input voltage corresponding to the levelconversion circuit; and the level conversion circuit is connected with the series resistance-capacitance circuit, the power battery and a wake-up circuit pin, and is used for obtaining a wake-up signal or a cut-off signal based on the input voltage, sending the wake-up signal to the BMS controller through the wake-up circuit pin, and cutting off the connection between the BMS controller and the CC2 interface based on the cut-off signal. The circuit can perform single wake-up based on a wake-up signal, so that the BMS directly enters a dormant state after charging is completed.

Description

technical field [0001] The invention relates to the technical field of electronic circuits of new energy vehicles, in particular to a BMS wake-up control circuit and a BMS wake-up control method. Background technique [0002] As the earth's non-renewable resources are decreasing day by day and the earth's environment is deteriorating, new energy vehicles are becoming more and more popular and become one of the most potential means of transportation in the new era. New energy vehicles are vehicles that use unconventional vehicle fuels as their power source. Currently, new energy vehicles such as pure electric vehicles, extended-range electric vehicles, hybrid vehicles, and fuel cell electric vehicles are equipped with power batteries for power output. , to provide a power source for new energy vehicles, the power battery is specifically a lithium battery. The battery management system (Battery Management System, hereinafter referred to as BMS) is the core of the power batter...

AI Technical Summary

Problems solved by technology

At present, when the BMS is fully charged and the charging gun is not removed in time, the wake-up control circuit is always in the working state, making the BMS unable to enter the dormant state, which makes the BMS unable to be awakened again, and affects the service life of the power battery.

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