Intelligent charging method and system for new energy electric vehicle battery and electric vehicle

Abstract

The invention discloses an intelligent charging method and system for a new energy electric vehicle battery and an electric vehicle, and the method comprises the following steps: when a received battery charging instruction is responded, obtaining a current starting SOC0, a request ending SOC1 and the temperature of each battery cell; when it is judged that the initial charging SOC0 is smaller than TBD1, the minimum value Tmin of the temperature of the battery cell is larger than the preset temperature T1, and SOC1-SOC0 is smaller than TBD2, charging is conducted at the maximum charging rate of the battery cell; and in response to the judgment that the initial charging SOC0 is smaller than TBD1, the minimum value Tmin of the temperature of the battery cell is larger than the preset temperature T1, and SOC1-SOC0 is larger than or equal to TBD2, charging is carried out at the maximum charging rate of the battery cell, in the process of charging at the maximum charging rate of the battery cell, the current SOC is obtained in real time, and in response to the judgment that the current SOC is larger than or equal to SOC0 + TBD2, charging is carried out by reducing the charging rate. According to the invention, the charging time can be shortened as much as possible to meet the actual use requirements of different users.

Description

technical field [0001] The invention relates to the technical field of electric vehicle battery charging, in particular to an intelligent charging method and system for a new energy electric vehicle battery and an electric vehicle. Background technique [0002] The traditional automobile industry started late and energy is in short supply. The development of new energy vehicles is the best way to achieve cornering overtaking in the automobile industry. New energy vehicles use pure electric vehicles as the main technical route. With the increasing number of electric vehicle users, the weaknesses of electric vehicles compared with traditional petrol vehicles are becoming more and more obvious. Among them, cruising range, battery life decay, charging time and safety become The four factors that current users are most concerned about. [0003] The charging time of an electric vehicle is mainly affected by the charging capacity of the battery cell, the capacity of the charging p...

AI Technical Summary

Problems solved by technology

[0003] The charging time of an electric vehicle is mainly affected by the charging capacity of the battery cell, the capacity of the charging pile and the thermal management capacity of the battery. The current charging strategy of the battery is based on the consideration of the safety and life of the battery cell, combined with the user's full SOC usage range. The charging strategy is used to meet the charging time requirements of all different SOC intervals. This charging strategy cannot give full play to the maximum charging capacity of the battery during the charging process of different SOC intervals.

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