Design of temperature compensated charger for lead-acid battery

The characteristic behavior of batteries mainly depends on temperature. However most of the chargers do not have temperature compensation feature. This case may cause gassing and decrease lifetime of battery especially in warm environment. In this paper a lead-acid battery charger in which the temperature compensation is realized by microcontroller is designed and realized. The design is customized for 12 V standard battery and two stage charging method is selected. Additionally, operating current and voltage are indicated on 2×16 LCD display in real time, and parameters can be set by 3 push button user interface.