Hey, I have been away for a few years(like 4-5 years!! jeez) ever since my lipo battery got overcharged due to my dumb charging setup. I got the urge to get the bike back in operation and wanted to run an idea past you guys.
Looks like the bulk charging for 20s lipo packs has hope now that lunacycles is stocking an affordable charger and grin has that sick satiator. My dead 20s pack was charged with a supposedly modified SLA charger that over charged it when I forgot to take it off charge soon enough. The BMS scene doesn't seem to have progressed much though, but I use the CA for protection while in operation, and I had an idea for a 20s DIY balance charger, and wanted to seek more intelligent feedback.
My thought is to wire up 20 single cell modules and power it with a 5v 20a supply.
I would link all the modules in parallel on the Vin side, I know that will work. Where my mind bogs down is can I wire the charge modules like a battery balance lead? Or would I need a pair of wires coming off for each cell group? Or is there a smarter cheaper better way I am missing?
On the battery front, sounds like the 18650GA Sanyo cells are well liked, I am watching tumich's thread with interest. I was happy with my hobby king lipo pack before I ruined it, and some of the packs that didn't get ruined still power my robomower just fine. What are diy battery makers doing these days? I'm working on building a spot welder in case I want to do 18650 cells, though from reading sounds like I might be better off just soldering with a larger iron.
Looks like the bulk charging for 20s lipo packs has hope now that lunacycles is stocking an affordable charger and grin has that sick satiator. My dead 20s pack was charged with a supposedly modified SLA charger that over charged it when I forgot to take it off charge soon enough. The BMS scene doesn't seem to have progressed much though, but I use the CA for protection while in operation, and I had an idea for a 20s DIY balance charger, and wanted to seek more intelligent feedback.
My thought is to wire up 20 single cell modules and power it with a 5v 20a supply.
I would link all the modules in parallel on the Vin side, I know that will work. Where my mind bogs down is can I wire the charge modules like a battery balance lead? Or would I need a pair of wires coming off for each cell group? Or is there a smarter cheaper better way I am missing?
On the battery front, sounds like the 18650GA Sanyo cells are well liked, I am watching tumich's thread with interest. I was happy with my hobby king lipo pack before I ruined it, and some of the packs that didn't get ruined still power my robomower just fine. What are diy battery makers doing these days? I'm working on building a spot welder in case I want to do 18650 cells, though from reading sounds like I might be better off just soldering with a larger iron.