PURPOSE: To provide a charging system for lead acid battery in which selection is made automatically and optimally between normal charging and uniform charging depending on the temperature of the lead acid battery at the time of charging(while taking account of season or region) so that optimal charge control can be realized.
CONSTITUTION: When an ON/OFF operating switch 1 is depressed to turn electromagnetic contacts 2 ON thus starting the charging operation of a lead acid battery 4 through a charger 3, battery voltage rises gradually. When the output from a voltage detecting comparator 7 goes H, a CPU 8 counts the output from a temperature detecting comparator 6 for the cases of (1). T<-5°C, (2). T≥-5°C, (3). T≥5°C, and (4). T≥30°C and when the total count exceeds 100, switching is made automatically to uniform charging.
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JPH0199441A | 1989-04-18 |