cor wrote:wineboyrider wrote:I have 2 36v chargers from ping. They both can adjust up or down just like the BMS battery ones (I suppose). The 2.5 amp ping chargers are great in that I ca adjust them for 10s lipo or 12s lipo (62v max I think).
Sounds good. I guess they can't adjust down to 24.5V for the other bike?
Thanks for the reference - I asked around at work and an IT guy told me that he was getting rid of 2 drawers of laptop chargers, except the newer ones.
Fine with me - I rummaged around and came up with a 15V Toshiba charger and a 19V HP charger. In series that is 34V, exactly what I need.
I know that these supplies are already current limited and will handle overload reasonable well, so I think I have found my "charger" for free
Now I only need to build a BMS and a Charge Controller to throttle back the current once a cell gets around 4.25V (LiPo pack). Zephyr sounds good, though I have not seen a schematic of the charge control part yet.
Actually I think the 24v charger is different as I tried to trim the voltage down and the lowest I got was 34volts. But, other ES members say the BMS battery chargers can be trimmed (adjusted) up or down? Since I want a faster opportunity charger anyways and the price is right I decided to go ahead and order one set for 24.5v.