Fault early warning method and system for automobile power battery

• Main Authors: KE JIONG, MENG XIANYA, FENG XIUCHENG, SONG HONGGUI, XING JUNYI, WANG XIONG, ZHANG LI
• Format: Patent
• Language: Chinese; English
• Published: 09.01.2024
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a fault early warning method and system for an automobile power battery, and relates to the field of power source performance monitoring of electric automobiles. The method comprises the following steps: acquiring initial early warning parameters of all battery cells to be detected in the power battery; and calculating an abnormal factor k of the to-be-detected battery cell under each initial early warning parameter, and taking the to-be-detected battery cell of which the abnormal factor is greater than the fault early warning threshold as the to-be-detected battery cell needing fault early warning. According to the invention, the abnormal factor of each to-be-tested battery cell can be determined according to an independently researched and developed algorithm, then fault early warning is carried out on the battery cell corresponding to the abnormal factor above the fault early warning threshold, the fault early warning logic is matched with the condition when the battery has a fault,