Automatic battery chargers for different types of motive...

Details Automatic battery chargers for different types of motive... Automatic battery chargers for different types of motive...

H - Electricity

02

J

320/11

H02J 7/00 (2006.01)

Patent

CA 1209641

ABSTRACT OF THE DISCLOSURE The present invention provides an improved battery charger apparatus having a control circuit providing differ- ent charging periods which are automatically correlated with the type of battery connected to the charger for charging the connected battery to a preselected full charge state. The apparatus has a charging circuit for charging the battery, a sensing circuit for sensing the state of the battery during charging thereof by the charging circuit and a circuit for determining first and second predetermined reference voltage/- current states. The apparatus causes the charging of the bat- tery at a preselected initial charging level for an initial time period and establishes a first finish time period. The apparatus further determines a first time at which the state the battery reaches the first predetermined referenced voltage/current state during the initial time period, and causes the charging circuit to continue to charge the battery at a preselected first charging level after the determination of the first time for a first finish time period. The appara- tus further establishes a second finish time period and deter- mines a second time at which the state of the battery reaches the second predetermined referenced voltage/current state dur- ing the first finish time period. The apparatus terminates charging of the battery if the state of the battery does not reach the second predetermined referenced voltage/current state during the first finish time period, and causes the charging circuit to continue to charge the battery at a pre- selected second charging level after the determination of the second time for a second finish time period.

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