dogman dan said:See Grin Technology's Satiator. Best charger I ever owned. https://ebikes.ca/product-info/grin-products/cycle-satiator.html
Thank you. It’s a bit out of my price range though.markz said:Lots of great $500+ chargers out there in www.mouser.com land.
Chalo said:To do that kind of range, you need something like a lab power supply. For a lot less cost and size, you can get a Meanwell adjustable power supply that will do its rated voltage plus or minus 10%.
You don't say what you're trying to charge, at what current.
izy said:see this one built by vortecks
https://www.youtube.com/watch?v=Sk_jOYjx99g
MadRhino said:My big old Meanwell PSUs were purchased very cheap 12 years ago from a recycling reseller. I have 6 and all of them still working fine. I have purchased since, a few smaller units made in China and some did fail pretty quick. A Meanwell, or combination of Meanwell units, can be used to charge the voltage and power that you need. Not as flexible as a big lab PSU of course (eg. Mastech HY10010EX ), but much higher power can be obtained with Meanwells, especially those that can be paralleled. A combination of Meanwell PSUs is the cheapest and simplest way to do fast bulk charging of RC lipo, and if you can find old used USA made units they can last a lifetime. Same for Mastech by the way: the old ones are much better than those Made in Asia, but they are getting hard to find.
MadRhino said:All of them can be assembled in a series, but only some specific models can be paralleled. You don’t need to use models of the same voltage to series them.
I series, the supplies and circuitry work independently, similar to having cells in series (each cell contributes independently). In parallel, the circuitry has to have a current sharing function, since by default, the supplies would only provide redundancy (one supply carries the load, and the other kicks in if the the first supply fails).bj97301 said:MadRhino said:All of them can be assembled in a series, but only some specific models can be paralleled. You don’t need to use models of the same voltage to series them.
Strange. Why not parallel? Seems like the safer config.
E-HP said:I series, the supplies and circuitry work independently, similar to having cells in series (each cell contributes independently). In parallel, the circuitry has to have a current sharing function, since by default, the supplies would only provide redundancy (one supply carries the load, and the other kicks in if the the first supply fails).bj97301 said:MadRhino said:All of them can be assembled in a series, but only some specific models can be paralleled. You don’t need to use models of the same voltage to series them.
Strange. Why not parallel? Seems like the safer config.
If you want to parallel for more current, then you need to look for supplies with current sharing, and it's best if the supplies are identical.
Get a few Meanwell HLG supplies. They are cheap and are sold as LED ballasts. For example, the HLG-60H-C700AB will do 50-100 volts, both voltage and current are adjustable. There are lots of voltage ranges available. (And since you can adjust current, odds of overheating go way down.)bj97301 said:Anyone know of a good adjustable charger? I am looking for something that can do 42-100.8v or I’ll settle for 42-84v.
JackFlorey said:For example, the HLG-60H-C700AB will do 50-100 volts, both voltage and current are adjustable.
MadRhino said:Exactly. But Meanwell PSUs are not chargers...
Or the HLG-480H-C3500B, which will do 60-130 volts at 3.5 amps. Or the HLG-600H-48B, which will do 24-48 volts at 12.5 amps. Two of those will easily cover his range. There are literally hundreds of models available.Chalo said:Ooh, 700 milliamps! Just the thing for an 84 volt, 1.5 amp-hour battery like what most of us use.
JackFlorey said:Or the HLG-480H-C3500B, which will do 60-130 volts at 3.5 amps. Or the HLG-600H-48B, which will do 24-48 volts at 12.5 amps. Two of those will easily cover his range. There are literally hundreds of models available.Chalo said:Ooh, 700 milliamps! Just the thing for an 84 volt, 1.5 amp-hour battery like what most of us use.