Method and system for detecting abnormal change of single power battery

• Main Authors: YAN GUOGANG, LI CHUN, ZHANG JIANLI, XUE KAIZHE, XIONG JINFENG, FANG LANLAN
• Format: Patent
• Language: Chinese; English
• Published: 11.05.2021
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a method for detecting abnormal change of a single power battery, which comprises the following steps: establishing a monomer dynamic data acquisition model, and acquiring voltage data of a monomer cell in real time; obtaining the highest monomer voltage and the lowest monomer voltage according to the collected voltage data; obtaining a charging and discharging process voltage curve, and respectively calculating according to the charging and discharging processes to obtain a highest monomer voltage change, a lowest monomer voltage change, a monomer highest voltage change rate and a monomer lowest voltage change rate; comparing the obtained highest monomer voltage change, the lowest monomer voltage change, the monomer highest voltage change rate and the monomer lowest voltage change rate with a set threshold value, and judging whether the monomer cell has abnormal change or not; and establishing a monomer acquisition model, identifying the highest monomer voltage and the lowest monomer