Investigation of safety-related parameters of aged Li-ion batteries for the use in second life applications

Understanding the safety characteristics of aged Li-ion batteries is essential for their effective integration into second-life applications. The SafeLiBatt project is a research initiative focused on evaluating the safety-related parameters of these batteries.

The presented study elucidates the impact of a battery’s state of health (SOH) on its safety behavior. Four high-power pouch cells (Li-NMC622) were exposed to elevated temperatures to achieve accelerated ageing. Subsequent thermal abuse tests were utilized to assess crucial parameters related to the thermal runaway (TR).

When compared to their non-aged analogs, the aged cells implicated a TR-onset lowered by about 10 – 20 K.