Research on the internal resistance cycle performance of lithium-ion batteries echelon use

Acquiring the recycle characteristics of ohm and polarization resistance of batteries retired from the 2008 Beijing Olympic games by testing cells in different rates stresses coupling with different SOC cycle ranges ;analyzing the possible influence factors of ohm and polarization resistance; establishing the ohm and polarization resistance function models for batteries cycling in the full SOC cycle range and the separate ranges based on different SOC cycle ranges stress, compared with the actual test data of the full SOC cycle range, and at the same time verifying the validity of these models.