Evaluation of BB-248/U Lead Acid Battery during Charge-Discharge Cycles at Low Temperature

摘要

The behaviour of the lead-acid battery type BB-248/U has been studied during many consecutive charge-discharge cycles. The cranking current and the minimum terminal voltage were 285 A (or 300 A) and 6 V, respectively. The working temperature was successively room temperature, O C, -20 C and -40 C while the rechargeability period was only 2 hours. This work shows that such a rechargeability period - with a maximum charge current and an applied terminal voltage of 20 A and 14.25 V (or 16 V), respectively - is far too short to completely recharge the battery. Moreover, the rechargeability rate is only very slightly affected by the value of the maximum applied thermal voltage in the range of 14.25 V to 16 V. Finally, a significant decrease of reserve capacity measured at room temperature has been observed after many charge-discharge cycles at low temperatures. (Author)