Abstract: Method and system for safety monitoring of a rechargeable lithium battery powering an electrical device. Primary parameters of battery are measured during a normal operation of the electrical device. Primary parameters may include: DC current; DC voltage; state of charge; measurement timestamps; battery temperature and ambient temperature. Primary parameters are processed to derive secondary parameters, and to determine a state of risk (SOR) of battery based on primary parameters and secondary parameters, during normal operation of electrical device. Processing may apply resistors-capacitors model and/or machine learning model. SOR determination may be based on comparison with baseline value reflecting baseline condition of battery. SOR may include categories of No Fault Found (NFF); Potential Fault Found (PFF); and Fault Found (FF). Alert of a potential short circuit derived hazard may be provided and/or countermeasure may be implemented responsive to determined SOR, such as when SOR category is PFF or FF.

Abstract: Method and system for monitoring the safety of a rechargeable Li-ion battery (LIB). An initial electrical state of the LIB is determined and altered by application or removal of DC electrical stimulus to trigger a time-varying response. The time-varying response of the LIB is measured, and at least one primary response parameter associated with the functional form of the measured response is extracted. At least one secondary response parameter is derived from the primary response parameter. A composite response parameter may be further derived from the primary response parameter and secondary response parameter. A likelihood of a short circuit precursor condition is determined in accordance with the primary response parameter, secondary response parameter and/or composite response parameter. Based on the determined likelihood, an alert of a potential short circuit derived hazard may be provided and/or a corrective measure to mitigate or prevent a short circuit derived hazard may be implemented.

Abstract: Method and system for monitoring the safety of a rechargeable Li-ion battery (LIB). An initial electrical state of the LIB is determined and altered by application or removal of DC electrical stimulus to trigger a time-varying response. The time-varying response of the LIB is measured, and at least one primary response parameter associated with the functional form of the measured response is extracted. At least one secondary response parameter is derived from the primary response parameter. A composite response parameter may be further derived from the primary response parameter and secondary response parameter. A likelihood of a short circuit precursor condition is determined in accordance with the primary response parameter, secondary response parameter and/or composite response parameter. Based on the determined likelihood, an alert of a potential short circuit derived hazard may be provided and/or a corrective measure to mitigate or prevent a short circuit derived hazard may be implemented.