I think this 60v 30a bench power supply
While a bit expensive. Its hard to beat the chareverter
What intelligent charging are you looking for?This route wouldn't have intelligent charging.
CV is the canonical 48V charger, but it may be overkill to replace an 18A charger. It’s not intelligent either.This is too complex. Looking to keep it simple.
One that understands the appropriate charging curve for LFPs and tapers off after 80%What intelligent charging are you looking for?
CV is the canonical 48V charger, but it may be overkill to replace an 18A charger. It’s not intelligent either.
One that understands the appropriate charging curve for LFPs and tapers off after 80%
Best chargers i own are bench power supplies and timing switches.This route wouldn't have intelligent charging..
I’m not sure either, but it sounds like the normal charge acceptance of an LFP battery is going to drop as you approach full charge.Not sure what the 80% taper means, sounds like something from a high power EV charger to maximize C rate well above 1.
I believe that's a reference to the "constant current" part
Looks at meanwell hep series some models can be programmed via canbus to tweak the charge parameters. @hwy17 uses them iirc. Not cheap by any means but silent passively cooled unlike a chargeverter screamer.Hello folks,
My LiTime 54V 18A charger is a piece of crap and I need to replace it so I can fully charge up my 48V batteries.
Any recommendations?
Had my first bug in my HEP-2300-55 this year. Woke up one morning with the power off and dead battery. I control the meanwell with a simple dry contact relay and it was no longer responding to the closed relay by enabling charge. I put the factory jumper back in and it still did not respond. Power cycled it by it's 240VAC grid supply and then it acted normally again and ever since. I'm gonna try to make sure I power cycle it at least once every 3 months now and hope that helps.Looks at meanwell hep series some models can be programmed via canbus to tweak the charge parameters. @hwy17 uses them iirc. Not cheap by any means but silent passively cooled unlike a chargeverter screamer.
That's correctThat just happens on its own if you have a power supply set to a specific voltage and a certain max current it will go from CC to CV when voltage is hit and current will taper based on battery acceptance.
That's correct
How does that happen? If the power supply outputs constant current, how will it know when to stop? If the battery doesn't have BMS, I fail to see how it would stop accepting current
Constant current means current is limited to a specified amount, it doesn't mean it "forces" that amount, the batteries will only accept the amount of current based on their IR and the voltage the charger is attempting to attain.
Current flows due to difference in voltage, as the battery charges the voltage rises and less current is accepted, once the charger and battery reach the same voltage no current flows and it is floating.
I read through the thread on this, and really don't plan/want to use the CAN bus interface. Am I wrong in thinking that all I need in addition to the unit, is wiring and protective devices? I only plan to use it manually @ 120v. I'm guessing this would trip my 1500w generator using propane, if I don't have a way to adjust maximum current.It requires a little work but in the spirit of DIY I'm a huge fan of this
Emerson R48-3000e3 Communication Switching Power Supply Module 48V Induction Heater Power Supply Disassemble With interface
I thought a Power Supply keeps sending a fixed current unless it has the intelligence to "stop" at a certain point.
I read through the thread on this, and really don't plan/want to use the CAN bus interface. Am I wrong in thinking that all I need in addition to the unit, is wiring and protective devices? I only plan to use it manually @ 120v. I'm guessing this would trip my 1500w generator using propane, if I don't have a way to adjust maximum current.
That's not how electricity works: https://en.wikipedia.org/wiki/Ohm's_law
Current is asked for, voltage is givenI thought a Power Supply keeps sending a fixed current unless it has the intelligence to "stop" at a certain point.
Voltage doesn't flow. Current does, rather, it is drawn.Current is asked for, voltage is given