New energy automobile charging residual time estimation method

Abstract

The invention discloses a new energy automobile charging residual time estimation method. The method comprises the following steps of 1, divide the charging process from 0% to 100% of battery charginginto n charging stages according to the sequence before and after charging through an electric quantity percentage node, the electric quantity percentage node comprises SOC1, SOC2, SOC3... SOCn withthe electric quantity percentage value increasing in sequence; 2, calculate the charging time corresponding to each charging stage in the n stages respectively; 3, acquire the SOC of the current battery, comparing the SOC with each power percentage node respectively, and judge the charging stage at this time; 4, calculate the time T from the charging of the percentage of electricity SOC to the endof the charging phase and obtain the time of each subsequent charging phase of the current charging phase; and 5, add the time T and the time of each subsequent charging stage in the current chargingstage to obtain the estimated remaining charging time.

Description

technical field [0001] The invention relates to the field of charging management and control of new energy vehicles, in particular to a method for estimating the remaining charging time of new energy vehicles. Background technique [0002] When charging a new energy vehicle, users want to be able to see the remaining charging time, because the allowed charging current of the battery is different at different temperatures, and the charging mode of the car is different, and the charging current requested by the battery management system BMS from the charger is also different. If only Considering the remaining charging capacity and the current charging current, the remaining charging time calculated in this way will not be accurate, not only the error is large, but also the remaining charging time calculated in this way will change frequently due to current changes, resulting in the remaining time value not changing with the charging time. It increases and decreases all the tim...

AI Technical Summary

Problems solved by technology

[0002] When charging a new energy vehicle, users want to be able to see the remaining charging time, because the allowed charging current of the battery is different at different temperatures, and the charging mode of the car is different, and the charging current requested by the battery management system BMS from the charger is also different. If only Considering the remaining charging capacity and the current charging current, the remaining charging time calculated in this way will not be accurate, not only the error is large, but also the remaining charging time calculated in this way will change frequently due to current changes, resulting in the remaining time value not following the charging time. Increase and decrease all the time, the displayed value fluctuates, the user cannot determine how much time is left to complete the charging, and the visual perception is poor

Images