Battery charger with active protection function and charging method

Abstract

The invention belongs to the technical field of charging of an electric vehicle, in particular to a battery charger with an active protection function and a charging method. The battery charger comprises a power conversion module group, a monitoring unit and an output module group, wherein the power conversion module group is connected with the monitoring unit and the output module group; the monitoring unit is connected with the output module group; the battery charger is connected with the electric vehicle through the output module group, so as to charge the electric vehicle; when the battery charger is connected with the electric vehicle, the battery charger communicates with a BMS of the vehicle. The output module group can conduct data interaction with the BMS in the electric vehicle in real time, so as to obtain the real-time charging data of a power battery of the BMS; according to a warning value and a threshold value, the output module group can be used for judging whether the BMS and the power battery are abnormal or not during a charging process; when the BMS and the battery data reach the warning value, an alarm is given out, and when the BMS and the battery data reach the threshold value, charging is stopped.

Description

【Technical field】 [0001] The invention belongs to the technical field of electric vehicle charging, and in particular relates to a charger with an active protection function and a charging method. 【Background technique】 [0002] Due to the depletion of fossil resources and the huge pollution of the environment caused by fuel vehicles, the automotive industry's attention and investment in environmentally friendly new energy vehicles have increased rapidly since 2000. It is foreseeable that in the near future, the proportion of new energy vehicles, especially pure electric vehicles, in the number of vehicles will increase rapidly. [0003] Participating units in the charging process of electric vehicles include: body (including charging socket, high-voltage contactor), power battery, BMS (battery management system), charger, cloud platform (remote server) and other parts. The charging process of traditional electric vehicles is controlled by BMS, which controls parameters suc...

AI Technical Summary

Problems solved by technology

[0005] However, the existing chargers only passively output voltage according to the instructions of the BMS, and do not have the function of monitoring and protecting the charging process during the charging process, so it is very likely to cause the battery to be overcharged. In the case of BMS failure, the charging Opportunities continue to charge the power battery for a long time according to the charging instructions previously issued by the BMS, which can easily cause the power battery to continue to be charged when it is fully charged. In this case, serious chemical reactions will occur inside the power battery. Seriously, the power battery catches fire and burns

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