Quote:
Originally Posted by Astro
If each cell is 3.6v then wouldn't a 2s2p "module" be 7.2v?
2s2p gives you twice the voltage and twice the Ah of a single cell.
4 cells wired to give 3.6v output would have all the cells in parallel, a 1s4p arrangement (if the individual cells were 3.6v).
I would say the Leaf modules are 7.2v or so output and if the module doesn't have the mid point of the 2S part of the 2S2P then you will have to treat them as 7.2v cells.
If the mid point between the two sets of paralleled cells is available then you could treat it as two cells in a single module. I.e. you could use a BMS that monitors 3.6v cells.
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Grrrrr. I was going off of my horrible memory, since all of my notes are at home. But yes, I looked again and they're 7.2v.
The specs say:
60a/h rated - 7.6V - 500 W/h - max continuous power 1875W or 240A
Peak current 540A
Measured 62Ah from 4.2 to 3V, and 64Ah (4.2-2.5V)
Maximum voltage 4.2V per cell / 8.4V per battery
Average voltage 3.8V
90% of the capacity voltage - 4.2-3.7V
Each module contains 4 prismatic cells (see photos), connected 2S2P
Each prismatic battery has rated capacity 30A/h and 3.8V nominal voltage