We're in the process of creating an electric unicycle like the ones here. We already have a design that we're sure will be competitive in the market once out. Now, I am assigned on working with the charging circuit. I was thinking of using power MOSFETs but I'm not quite sure which one should I get. Do you have any recommendation? Preferably 60v. The charging period is critical so I'd like to have a MOSFET that has no problem with long charging period.

 

You need to sort out what voltage, capacity, the battery is going to be at, what type of battery is it, Lithium, Nicad, Nimhi, Lifepo, etc this will dictate the type of charging circuit you need to design, you may find there are already off the shelf ready made chargers cheaper, only then you can choose the best components for your circuit.

 

You need to sort out what voltage, capacity, the battery is going to be at, what type of battery is it, Lithium, Nicad, Nimhi, Lifepo, etc this will dictate the type of charging circuit you need to design, you may find there are already off the shelf ready made chargers cheaper, only then you can choose the best components for your circuit.

Thanks for the info. We'll go with Lithium, I guess.

 

Make sure you read up about the dangers of lithium batteries and the need for a correct charging profile. There are integrated circuits available which are specially designed to handle and monitor lithium battery charging.
Welcome to AAC!

 

We'll go with Lithium, I guess.

Lithium refers to a class of batteries that use Lithium for one of the terminals (usually the anode); each is likely to have unique charging requirements.

You'd be better off buying an IC, if you want to grow your own, or a charger for your specific battery chemistry.

 

Make sure you read up about the dangers of lithium batteries and the need for a correct charging profile. There are integrated circuits available which are specially designed to handle and monitor lithium battery charging.
Welcome to AAC!

I see.. Hmmm, well I guess I'll have to disregard using lithium battery. But still want to try and compare different kinds to see which one is compatible. And thanks for the welcome here in AAC. I'm learning a lot here.

 

Lithium refers to a class of batteries that use Lithium for one of the terminals (usually the anode); each is likely to have unique charging requirements.

You'd be better off buying an IC, if you want to grow your own, or a charger for your specific battery chemistry.

Yeah, we're also considering buying IC but I'm not really sure if it's wise to use that since it's kinda expensive

 

Yeah, we're also considering buying IC but I'm not really sure if it's wise to use that since it's kinda expensive

You have to decide which battery chemistry you're going to use before you can work on a charging circuit.