LIPoly and LI-IOn cell question
10-19-2005, 11:43 PM
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LIPoly and LI-IOn cell question
When charging your LiPoly or Ion pack, the number of cells you select in your charger would be whether it's a 2S, 3S or 4S, correct? It's not the acutal physical number of cells you have in the pack. So, if I had a 3S4P pack and a Triton Charger, I would select charging for 3 cells as there are only 3 cells in series and the rest are in parallel (that would amount to 12 physical batteries in the pack). Am I correct in this?
Also, LiPoly packs are rated nominally at 3.7V under load and 4.2V unloaded and fully charged. So we have two values to deal with in voltage, 7.4V and 8.4 volts. My question is which voltage would you program into the charger? Of course, current would be 1C.
Same question goes for Li-Ion packs rated at 3.6V and 4.1V respectively. I see a pack advertised on RCU as Li-Ion and the label says 7.4 volts at 4000 Mah. It is a physical 4 AA pack. I believe it would have to be wired in 2S. What would be the charge voltage? Whether or not they are 2P or acutally 4000 Mah cells, I don't know. I have an ignition pack with the same scenario, only it's a Relion pack.
I am in the market for an all purpose charger and trying to do a little pre-emptive research.
Jon
Also, LiPoly packs are rated nominally at 3.7V under load and 4.2V unloaded and fully charged. So we have two values to deal with in voltage, 7.4V and 8.4 volts. My question is which voltage would you program into the charger? Of course, current would be 1C.
Same question goes for Li-Ion packs rated at 3.6V and 4.1V respectively. I see a pack advertised on RCU as Li-Ion and the label says 7.4 volts at 4000 Mah. It is a physical 4 AA pack. I believe it would have to be wired in 2S. What would be the charge voltage? Whether or not they are 2P or acutally 4000 Mah cells, I don't know. I have an ignition pack with the same scenario, only it's a Relion pack.
I am in the market for an all purpose charger and trying to do a little pre-emptive research.
Jon
10-20-2005, 04:44 AM
#2
RE: LIPoly and LI-IOn cell question
ORIGINAL: EMB145CA
When charging your LiPoly or Ion pack, the number of cells you select in your charger would be whether it's a 2S, 3S or 4S, correct? It's not the acutal physical number of cells you have in the pack. So, if I had a 3S4P pack and a Triton Charger, I would select charging for 3 cells as there are only 3 cells in series and the rest are in parallel (that would amount to 12 physical batteries in the pack). Am I correct in this?
When charging your LiPoly or Ion pack, the number of cells you select in your charger would be whether it's a 2S, 3S or 4S, correct? It's not the acutal physical number of cells you have in the pack. So, if I had a 3S4P pack and a Triton Charger, I would select charging for 3 cells as there are only 3 cells in series and the rest are in parallel (that would amount to 12 physical batteries in the pack). Am I correct in this?
Also, LiPoly packs are rated nominally at 3.7V under load and 4.2V unloaded and fully charged. So we have two values to deal with in voltage, 7.4V and 8.4 volts. My question is which voltage would you program into the charger? Of course, current would be 1C.
Same question goes for Li-Ion packs rated at 3.6V and 4.1V respectively. I see a pack advertised on RCU as Li-Ion and the label says 7.4 volts at 4000 Mah. It is a physical 4 AA pack. I believe it would have to be wired in 2S. What would be the charge voltage?
I am in the market for an all purpose charger and trying to do a little pre-emptive research.
Jon
Jon
John
