I am building a control circuit for a battery charger, which I guess is kind of straight forward if you know exactly which battery is going to be used in the charger, but I don't. The battery voltage is going to be 12 V, but the battery capacity (Ah) can vary... The charger is supplied by a windmill, whos speed varies, and the current applied to the circuit will vary.
When the voltage over the battery reaches a certain level a zener diode will make a transistor conduct, and the current will be "shunted", so that the battery don't overcharges. (After that it will trickle charge)
Don't I have to limit the current applied to the circuit, so that the charging speed don't get to fast? How do I do that when the battery capasity can be between like 5 Ah and 30 Ah? I have been told lately that I don't have to worry about that... but I don't understand why?
When the voltage over the battery reaches a certain level a zener diode will make a transistor conduct, and the current will be "shunted", so that the battery don't overcharges. (After that it will trickle charge)
Don't I have to limit the current applied to the circuit, so that the charging speed don't get to fast? How do I do that when the battery capasity can be between like 5 Ah and 30 Ah? I have been told lately that I don't have to worry about that... but I don't understand why?