Study on thermal effect of LiFePO4/C battery with different capacity retention rate in adiabatic environment

The life of the new LiFePO4/C battery with prelithiation technology has been greatly improved. In the life-cycle management of this kind of long-life lithium ion battery, attention should be paid to the change of battery resistance and the change of thermal effect during charge/discharge process, so as to accurately evaluate its health state and adjust its thermal management strategy. In this paper, battery samples with prelithiation technology under different capacity retention rates (100%, 91.72%, 75.57% and 67.78/%) were studied. By comparing with conventional batteries with same capacity, the change of internal resistance (total resistance, ohmic resistance, polarization resistance) and the discharge thermal effect of batteries with different capacity retention rates in adiabatic environment were analysed.