Studying the failure modes of power battery systems is crucial for improving battery life, the safety and reliability of electric vehicles, and reducing the operating costs of electric vehicles. Considering various failure modes during the design of power battery systems is essential to enhancing battery safety.
A power battery system typically consists of battery cells, a battery management system, a battery pack (including functional components), wiring harnesses, structural parts, and other related components. Power battery system failure modes can be categorized into three different levels: cell failure modes, battery management system failure modes, and battery pack integrated failure modes.