Scale parameter assessment based on pivot quantity for reliability analysis of a complex system

Reliability assessment is the key to the reliability design of a complex system. This paper takes the lithium battery pole slice separators (LBPSS) as the research object and selects the superposition Weibull model as the initial model. Based on the graphic method, a pivot quantity is introduced to estimate the range of scale parameters. A genetic algorithm is used to optimize parameters in a given parameter interval. Compared with other models and techniques, using the superposition Weibull model, pivot quantity, and graphic method to evaluate the reliability of LBPSS is more reasonable, provides a reference for improving the reliability and maintainability of LBPSS, and lays a theoretical foundation for analyzing the failure mode and failure mechanism of a complex system.