what power can a house typically put out before a different breaker or something needs to be put in?
that power supply/charger goes great with lifepo4 and I could charge my 700watthour battery in like ten minutes if my house can take it. my battery can take it… 12 minutes charge time. ANR26650M1B_v1 July 28_print (imrbatteries.com)
someone buy my extra batteries!!!
You’re in the states right? Usually a single breaker in the US is 1800W or 2400W, each breaker is responsible for a single circuit that typically covers a couple of rooms and for heavy duty stuff like ovens, showers, driers, they tend to be put on separate circuits. Sometimes a standard circuit dedicated to one appliance is enough for those, but they normally need a special high power circuit up to ~5000W
Higher voltage domestic power in the rest of world tends to run a bit higher power too, an Irish typical circuit is 3120W, but we also have clear limits on full-house power. 12kW as standard but you can apply for an enhanced connection to 16kW with some other concessions like higher bursts and stuff
think worth getting that monster charger and redoing my circuit breaker. How to Change a Circuit Breaker to Increase Amperage | eHow
so can charge super fast but still be within the cell’s specs
Not sure about the states, but boy I would not be in a rush to mess with a mains circuit in any capacity, definitely not at the breaker level. You need some serious safety procedures and higher spec gear to poke at high energy stuff. Also you’d have to make sure the charger is the right voltage output, and that it does the appropriate constant current constant voltage charging
Constant current or constant voltage I believe either is fine as long as doesn’t go over the current the cells can take or above their max voltage.
No that’s not true, constant voltage charging that doesn’t go over a certain current limit effectively is constant current. If you’ve got a current limit in place and you’re hitting that current, it’s constant current. The problem is if you’re trying to hope a CV system maintains good CC control, it probably won’t.
Also if you run constant current all the way up to the full charge voltage you’re not going to have a good time. The cells can only take full charge current up to a certain point, beyond that they need to slow down to whatever current flows in at the right voltage. This is CV, and again trying to run a CC charger and hope it maintains good CV characteristics isn’t going to work
You need CC+CV 99% of the time
A battery doesn’t need cc or cv charging. As long as the power supply doesn’t put out a current that is too high or result in the cell getting to too high a voltage it doesn’t matter. The typical cheap power supply I’ll use is a constant voltage and the resulting current decides by ohm’s law and will change as the cell increases voltage but that’s ok.
Yeah but a battery is not a linear ohmic device. The current is determined by the chemical reaction inside, so you’ll end up with biig swings in current
I believe the common bulk power supply is constant voltage and the current does swing based on ohms law and that’s fine as long as it’s not too high
Top chart is a standard CC+CV charger.
Bottom chart I think would be a CV charger.
I suppose they would both work fine as the CV at the end is the important part
don’t think they need that charge termination feature either that I often see
I’m of the same opinion, but don’t have the data to say that as fact
Check this idea. A charger that starts off high amps, and slowly tapers the whole way, instead of two levels. Would that not fast charge, and yet allow high number of charge cycles?
Seems you can stuff juice in at first, and is likely too much right at the changeover to low amps.
The charts above are from a study that looked at exactly that.
The effectiveness of the proposed charging algorithm was then compared with that of the conventional CC-CV charging algorithm. By applying the proposed algorithm, a battery with repeated charging would have a slower aging effect compared to a battery with the conventional charging method.
That’s pretty much constant voltage charging as done by a common bulk power supply like meanwell. Maybe they’re wattage limited too and I don’t see details but know it will put out more current when connect to a low voltage battery.
Or I don’t really look at the study but with constant voltage charging it does have that effect.
US $210.04 11%OFF | Powerful 3000W 0-90v 0-120v 0-25A Voltage Current Adjustable Lithium Battery Charger for 12V 24V 48V Li ion Lifepo4 battery pack
Of you read my other thread then this is funny
MR60 used for AC power…
Anyone got one of these? Dollar to watt this thing is a great deal if it doesn’t break.
show me the outlet that can deliver 3000W lol. Maximum here in europe is like 2.6kW and in the US its even lower I think.
Yeah I checked it out a bit earlier in this thread
That charger is only rated to 1500W when using a 120V outlet though.
I have no idea if it can actually run at that level either, just quoting their spec.