Research on the charge mode of series-connected batteries

Traditional charge mode based on terminal voltage of batteries results in serious overcharge since status of battery cell is not known, it seriously shortens batteriespsila cycle life, even results in hidden trouble of safety. A new type of charge mode combining BMS (Battery Management Systems) and charger is presented in this paper. By data sharing between BMS and charger, the charger can known very well information about each batterypsilas voltage, temperature and failures, according to this, charger can adjust charging current. Therefore, it ensures no overcharge of any battery occurs and reduces influences that charging have on batteries, and increases safety of charging process. In this paper, principles of model parameter identification under the charge mode and an even more scientific consistency evaluation based on capacity and internal resistance are also elaborated.