Influence of Breathing and Swelling on the Jelly-Roll Case Gap of Cylindrical Lithium-Ion Battery Cells

Cylindrical 18650 and 21700 lithium-ion batteries are produced with small gaps between the jelly roll case. The size of these mechanical attachment to case can have a significant impact on thermal properties cells. To investigate influence state charge (SOC) health (SOH) gap, computed tomography (CT) gray-value analysis was conducted various cell types at 0% 100% SOC after cycling. results show gap for new cells substantial reduction in during first cycles.