curiouscarbon
Science Penguin
- Joined
- Jun 29, 2020
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nice! ??
Yes it will. It can also be set up to open a relay on the AC side of the charger to turn off the charger..EQ voltage is not good for Lithium... Question, can the Orion BMS let me know if a cell high voltage limit has been reached?
I agree, but in this case it is an AC powered charger and not a charge controller. Also in this case the charger cannot be set and goes into high viltage Equalization mode at the end if charging. The OP is considering a new charger that can be programmed for his golf cart.Its not a real good idea to let the protection device handle the charging voltage. The normal way is:
- control the charging voltage independendly by an charging controller
That's the voltage I have been testing with an 18 and 40 amp supply, and it works well.I've decided to only charge my LiFePO4 batteries to 3.4v per cell. (Following 80/20 rule)
Does that mean I set my CC/CV Power Supply to 13.60v for charging?
Also, for storage of a single, 4S LiFePO4 pack what is the ideal voltage?
Thanks
I agree, the best way to get there is by measuring Watthour or Amphour discharge.Storage is 20 to 50% full, not necessarily a voltage
I leave them on defaults. The most important thing is to enter the capacity as you want to see it. Since I charge to about 90% I have entered a lower value for pack size by that 10 %. My pack resets almost every day so drift is not an issue. The important information from the PC program is the consumption in Ahrs measured by the accurate Ammeter and compare that to what it took to charge it back. As I may have mentioned earlier Amphour consumption is an important piece of data in a motive application like a golf cart or EV. One version of that SOC meter offers a slot so you can record data if that is an interest. It does not display Amphour consumption but the other guages can. There are several options for display.Are there some generic settings for these?
I leave them on defaults. The most important thing is to enter the capacity as you want to see it. Since I charge to about 90% I have entered a lower value for pack size by that 10 %. My pack resets almost every day so drift is not an issue. The important information from the PC program is the consumption in Ahrs measured by the accurate Ammeter and compare that to what it took to charge it back. As I may have mentioned earlier Amphour consumption is an important piece of data in a motive application like a golf cart or EV. One version of that SOC meter offers a slot so you can record data if that is an interest. It does not display Amphour consumption but the other guages can. There are several options for display.
I don't know the particulars of every one. The most configurable is the most expensive. For your purposes the simple SOC one offered by Orion might be the most cost effective even thoughbit does not display the Amphours.Which gauge are you referring to that will display amp-hours?
My comment to krell was specific to the Orion BMS defaults for drift. The charging settings for your batteries should be specific to them. Presumably Rebel publishes some info you can use for starters. My only suggestion is if it is truly LFP charge it to 3.4 volts per cell.But on this Rebel battery, I'm not changing any settings on this one.
Just trying to make sure I know how to safely and properly charge it.
A SOC meter will do the same thing, right?As I may have mentioned earlier Amphour consumption is an important piece of data in a motive application like a golf cart or EV
Yes the meter just does the math and displays it in percentage bars if I remember correctly. I haven't used mine recently because I have the Wifi display that works from my couch.OK Ampster, I get it. Drift would be used when you don't fully charge the battery on a regular basis.
A SOC meter will do the same thing, right?
The only way to top balance is to take them all to at least 3.6 volts per cell. Anything lower would not be accurate enough to be considered balanced.if I use the 20-80 parameters, would I do a top balance at 80% or the whole 100%?
What exactly are the 20-80 parameters? I hear a lot of folks saying they are going to stay with here yet charge to 14v every day (and that's in the 99% of SoC range).One more thing, if I use the 20-80 parameters, would I do a top balance at 80% or the whole 100%?