Flexible Sensors for Battery Health Monitoring

• Flexible sensing technology enables real-time, multi-physical field monitoring of battery health under complex operating conditions, overcoming limitations of traditional methods. • Integration of AI with flexible sensors facilitates a 'sensing–AI–control' framework, enhancing monitoring efficiency and predictive capabilities. • The review systematically covers mainstream flexible sensing technologies (film sensors, thermocouples, optical fiber sensors) and their mechanisms for revealing internal battery processes. • The work provides technical references and promotes the application of flexible sensing technologies to improve battery system safety and reliability.