Power battery charging condition extraction method and device based on big data

• Main Authors: CHENG CHAOWU, DENG YUANFA, HU HUIHUI, SHEN CHAO, LI DONGSHENG
• Format: Patent
• Language: Chinese; English
• Published: 18.08.2023
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a power battery charging condition extraction method and device based on big data, and relates to the technical field of vehicle power battery analysis, and the method comprises the steps: obtaining single mileage average vehicle speed distribution diagrams of different vehicles at different dates; obtaining fast charging data of the vehicle with the same driving condition in different set time periods; selecting charging data of which the charging depth is greater than a preset value; according to the selected charging data, the SOC values of the set number of groups of charging data of each vehicle in the same date are in one-to-one correspondence, and fitting is carried out to obtain an I-SOC and U-SOC relation curve under fast charging and slow charging; and obtaining an I-t corresponding relation, and analyzing the temperature consistency and the monomer voltage consistency of the battery pack when the vehicle is charged in different seasons. According to the method, the fast char