Battery charger - building techniques

[gibrocksonne]

Hello,

I am familiar electronic designing since it is my job, but designing a high power charger is everything but simple! (I am most familiar with nA/µA)

I buy this bike

, a NC RH205S motor, I am going to buy 64 A123 26650 cells (16S4P - 10Ah/48V), and I'am checking a ballancer board. I will also try to build my own sinusoidal driver.

But I really need help for the charger, how to convert 230V/AC to something like 60V/DC + CC/CV charger, without using a huge and expensive transformer?

Should I directly use a diode rectifier bridge + DC/DC converter ? Any designing error would conduct me to DIE!

I hope there will be some electronic engineers on this forum
Thank you !

 

[NeilP]

you could start by reading the threads related to the modification of the Meanwell supplies.

There are schematics in the threads somewhere


http://www.endless-sphere.com/forums/viewtopic.php?f=14&t=4125&start=30

http://endless-sphere.com/forums/viewtopic.php?f=14&t=36114

The meanwell supplies, modified are what many of us use, modified to reduce the max current rating