Charging system and method for automatically matching with voltage class of auxiliary power source of BMS (battery storage system) of electric automobile

Abstract

The invention provides a charging system and a method for automatically matching with voltage class of an auxiliary power source of a BMS (battery storage system) of an electric automobile. The charging system comprises a charger and a voltage class recorder, wherein the voltage class recorder is arranged in the electric automobile and is used for storing the voltage class parameters of the auxiliary power source of the BMS of the electric automobile; the charger is connected with the voltage class recorder through a microcontroller, so as to obtain the recorded voltage class of the auxiliary power source of the BMS of the electric automobile. The charging system has the advantages that by arranging the voltage class recorder in the electric automobile, the voltage class recorder is used for recording the class of the auxiliary power source of the BMS of the electric automobile; the microcontroller of the charger is connected with the voltage class recorder in a communication way, so that when the charging is required, the charger firstly obtains the voltage class of the auxiliary power source of the BMS of the electric automobile through the microcontroller, then a power source module with applicable voltage class is accessed according to the voltage class, and the matched auxiliary power source is automatically provided for the BMS of the electric automobile.

Description

【Technical field】 [0001] The invention belongs to the field of electric vehicles and electric vehicle charging, and in particular relates to a charging system and method for automatically matching the voltage level of an electric vehicle BMS auxiliary power supply. 【Background technique】 [0002] With the continuous development of my country's electric vehicle industry, electric vehicles have become more and more popular. However, the fast charging of electric vehicles has encountered industry problems. This problem is reflected in the existence of two types of BMS auxiliary power supplies for electric vehicles: 12VDC and 24VDC. Although it has been regulated in the new national standard and requires uniform use of 12VDC, a large number of 24VDC electric vehicles have entered the market, and even some vehicles will still enter the market in recent years. The difficulty lies in: before charging the electric vehicle, the charger first provides low-voltage auxiliary power to th...

AI Technical Summary

Problems solved by technology

The difficulty lies in: before charging the electric vehicle, the charger firstly provides low-voltage auxiliary power to the electric vehicle BMS, and then communicates with the electric vehicle BMS to obtain the charging demand of the electric vehicle, but the charger provides auxiliary power to the electric vehicle BMS It cannot automatically identify its voltage level. If the electric vehicle needs 12VDC, once the charger provides 24VDC, the electric vehicle will be damaged; if the electric vehicle needs 24VDC, and the charger provides 12VDC, the BMS of the electric vehicle cannot work due to insufficient supply voltage. make it impossible to charge

Due to the problem of two voltage levels in the BMS auxiliary power supply of electric vehicles, there must be two types of fast charging equipment in the market, and electric vehicles can only be charged on chargers with corresponding voltage levels.

However, electric vehicle owners do not necessarily know whether their electric vehicle BMS auxiliary power supply is 12VDC or 24VDC when charging. If they are not careful, they will face accidents that damage the electric vehicle. It takes a lot of manpower and material resources, and the saturation of personnel work is very low, which will cause a great waste of social resources

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