Experimental Study of Lithium-ion Battery Thermal Behaviour Under Abuse Discharge Condition
Keywords:lithium-ion battery, thermal behavior, hybrid vehicle, abuse discharge
This article presents the impact of abuse discharge condition on the battery cell surface temperature. The abuse discharge condition is when the battery is discharge down to 10% State of Charge (SOC). To determine the temperature evolution of the battery cell surface, a series of experiments is conducted. Three battery cells in a battery pack are discharged at 1C, 3C, and 5C discharge rate with a constant cooling air velocity of 2 m/s. The battery is discharge from 100% SOC down to 10% SOC to simulate the abuse discharge condition. Experimental results show that discharging the battery at SOC lower than 20% contributes to a radical increase of cell temperature at all battery cell locations impacted by a sudden increase of internal resistance’s value in this region.