Abstract:
A new charging algorithm for lead-acid batteries in photovoltaic systems is presented. For
increasing lead-acid battery cycle life, it is necessary for each discharge, recharge it to the
maximum state of charge, and simultaneously protect it from the excessive gassing phenomenon.
This algorithm provides these functions by using DC-DC converter, which differs from the
traditional “ON/OFF” regulator. In fact, it can complete the final portion of the charge process (the
most complex) and decreases the plate sulphation through matching the batteries characteristics to
the photovoltaic performances. The simulation results show that, using the proposed algorithm, the
battery would reach its maximum state of charge compared with the conventional charging
algorithms
