charge to lifepo4
- Thread starter jesuss
- Start date
Ypedal
100 TW
Welcome to the forum !
No worries about the english grammar, just do your best and we will try to figure it out.. 8)
You have a 48v 20ah LiFe battery.. but i don't quite understand your question ?
You have no charger and need one?
Or you have a charger and it is not working ?
No worries about the english grammar, just do your best and we will try to figure it out.. 8)
You have a 48v 20ah LiFe battery.. but i don't quite understand your question ?
You have no charger and need one?
Or you have a charger and it is not working ?
dogman dan
1 PW
I fast charge my ping 36 volt at work with a 4 amp sla charger, it just slightly undercharges it since it is set for sla voltage. I have not found one like it in 48 volt. Golf cart chargers come in 10 amp, but the ping can't take more than 5 amps. Maybe a 48 volt power supply? You could just calculate when to turn it off.
Link
1 MW
How many amps can the Ping BMS handle? You could just use a faster SLA charger, though you'd have to modify it to get a full charge.
Would someone be kind enough to explain what type of chargers are interchangeable? It is definitely surprising to see that you can use an old fashion SLA charger to charge a LiFePo4.
For example if I have a Nimh Charger could I also use it to charge an SLA or a Nicad of the same voltage?
For example if I have a Nimh Charger could I also use it to charge an SLA or a Nicad of the same voltage?
Hi
Life batts need CC CV constant current constant voltage, so yes SLA chargers can be used to charge them however it is advisable to see if you can tweak the charger so it matches the cell voltage, I will be using 24V SLA chargers to charge my life batt packs but they will be tweaked to put out 29.2V for an 8 x cell Life Batt pack say. Its still wise to use a BMS as well when charging and discharging.
Look for an SLA charger as near to your pack voltage with the required charging rate and you should be ok.
Knoxie
Life batts need CC CV constant current constant voltage, so yes SLA chargers can be used to charge them however it is advisable to see if you can tweak the charger so it matches the cell voltage, I will be using 24V SLA chargers to charge my life batt packs but they will be tweaked to put out 29.2V for an 8 x cell Life Batt pack say. Its still wise to use a BMS as well when charging and discharging.
Look for an SLA charger as near to your pack voltage with the required charging rate and you should be ok.
Knoxie
docnjoj
1 GW
No! You would have to monitor it as the cutoff is very different! Dont consider NiMh charger for Lithium!inspron said:
otherdoc
mazott
100 mW
- Joined
- Sep 25, 2007
- Messages
- 35
The SLA charger does not support the BMS balancing process, IMHO.
It can charge almost 95% (rough estimate) but then stops and no further stage proceeeds.
As the unbalanced condition progresses with the number of re-charges increasing, the pack would be consequently charged even less and less, I guess.
It can charge almost 95% (rough estimate) but then stops and no further stage proceeeds.
As the unbalanced condition progresses with the number of re-charges increasing, the pack would be consequently charged even less and less, I guess.
slayer
1 kW
mazott said:
sla does not support bms ...not true
it can charge to 95 % then stops and no further stage proceeds...
a sla charger is three stage constant current to a certain voltage then goes in constant voltage when it has reached a certain voltage for balancing then goes in float mode to keep it fully charges all the time
as far as the unbalanced processes you are talking about i can t imagine where it is happening ...you tell me that
slayer
1 kW
what i think you are thinking is that if it is not fully charged 95 % it will loose its charged every time like a sla battery would loose but lifepo4 is being charged as a same method of sla but does not behave the same way , they can be recharged anytime not needing to go to a 100 % and have no memory effects so you don t have to recharge them right away
mazott
100 mW
- Joined
- Sep 25, 2007
- Messages
- 35
slayer said:
Probably not true but my Crystalyte SLA charger looks like behaving as a 2-stage IOU charger, where the first stage is CC and the second one is a boost (OU), whereby in the boost loop phase the voltage is repeatedly increased up to a limit where the current reaches several amperes and then goes back to a lower value for a while. If that true, BMS incompatibility might be likely.
