Robust testing requirements for Li-ion battery performance analysis

Lithium-ion batteries are considered reliable option for Electric vehicle propulsion and portable applications. Various battery chemistries are being developed to enhance safety and performance of batteries to improve lifespan and reliability. Battery use case scenario often dictate requirements of different li-ion battery types. When target applications are fulfilled, other key considerations are implemented which include testing and characterisation to understand useful performance indicators from chosen battery type. This paper investigates current testing and characterisation needs to understand capacity fade and battery degradation with respect to temperature variations. Cycling tests followed by reference performance tests are used to analyse capacity fade. Due to limitation for the paper size only capacity fade analysis along with immersed test setup are focused to understand battery degradation with respect to various C-rates. Key findings are discussed, and comparative analysis is provided with future recommendations.