To successfully charge a battery, it should be supplied with DC current and not AC. This circuit shows how you can use DC voltage to regulate and finally charge the battery.
Now if you have AC voltage, you can convert it using a rectifier bridge and pass it through filter to obtain DC voltage which can then be used in this circuit to charge the Lead Acid Battery. Car also consists a lead acid battery.
Now if you have AC voltage, you can convert it using a rectifier bridge and pass it through filter to obtain DC voltage which can then be used in this circuit to charge the Lead Acid Battery. Car also consists a lead acid battery.