| 摘要 |
The method of estimation of the state of charge of a lead acid battery comprises measuring the open circuit voltage difference (V-) between an integrated liquid junction reference electrode and a negative battery terminal during at least one cut-off period. It further comprises determination of the sign of the current though the battery prior to cut-off and estimation of the state of charge on the basis of the open circuit voltage difference and, according to the sign of the current, respectively of a charge (C1, C2) or a discharge (D1, D2) calibration curve, previously determined during a calibration procedure. The cut-off period has preferably a duration of at least 5min. |
