The invention relates to the technical field of
lithium battery diagnosis, in particular to a
lithium battery fault diagnosis
system based on real-time impedance monitoring, which comprises a disturbance
signal acquisition module, an impedance track extraction module, a polarization response comparison module, an abnormal period judgment module and a
structural risk output module. According to the method, a dynamic comparison mechanism of polarization
response time difference and structure state parameters is introduced, periodic risk grading and characteristic quantity marking are linked, tiny response variation in the
lithium battery operation process is subdivided, quantitative output of key nodes is achieved by fusing
pole piece dynamic characteristics, periodic risk state
traceability and abnormal node tracking are supported, and the reliability of the
system is improved. According to the invention, the method can achieve the fine structural
abnormality marking and multi-stage alarm, improves the timeliness and foresight of
structural risk management, can achieve the parallel collection and
processing of multi-element response signals, promotes the high-reliability operation and distributed
fault management and control of a
lithium battery system, expands a
safety monitoring boundary, and improves the precision and
granularity of active early warning and management.