design and construction of 12v dc battery charger

📄 Project Abstract

A battery charger is an electrical device that is designed in such a way as to recharge lead acid battery cells. The aim of producing 12v/1.5ampere battery is to help lead acid battery users save money which would have been used to buy another battery. Since lead acid battery is rechargeable, it is ideal to have a 12v battery in order to recharge your battery when it runs down. When this device is connected to an a.c power source through its input, then by the configuration of the device, the output would produce 12v/1.5ampere current which when connected to a lead acid battery, there will be low of current from the device to the battery and at the same time there would be an electro-chemical reaction inside the battery cells to reactivate the electrons in the battery cells. Once the battery nears a fully charged state, excess charging current produces heat. It would be observed that the temperature of the charger will rise at this point the battery is almost fully charged, but as the heat increases the resistance of the battery increases also. Voltage loss occurs and charger becomes less efficient and as a result, optimum charging can't be achieved. To overcome this problem, a cooling fan is provided to maintain the battery temperature with the above procedure 12/1.5A battery is produce.