Cegalo Posted December 6, 2015 Share Posted December 6, 2015 Hi everybody! After my NB1 E+ with 320W battery is full charge I have noticed that the App displays Drive Voltage 61.44V but I thought that NB1 battery was 55.5V. Is everything ok? By the way, how can I check that my NB1 serial number is a real E+ and not a fake E with a 320W battery? Link to comment Share on other sites More sharing options...
esaj Posted December 6, 2015 Share Posted December 6, 2015 That voltage is within normal limits. The voltage usually mentioned is the "nominal voltage" of the cells in series. The nominal voltages for most Li-Ion chemistries is around 3.6-3.7V per cell. But when the cell is fully charged, the voltage is usually around 4.20-4.25V, some can go all the way up to 4.35V. Usually I've seen 4.20V used for calculation. So, a Ninebot has a battery pack in 15S2P-configuration, meaning 15 cells in series (15S), with two similar 15-cell sets in parallel (2P). In series, the voltage goes up but the capacity stays the same. In parallel, the voltage stays the same but the capacity goes up. With the nominal voltage, 15 cells in series will give about 15 * 3.7V = 55.5V. But once the cells are fully charged, the voltage should actually be around 15 * 4.2V = 63V. Coincidentally, if you look at your charger, it should say that it outputs 63V(ish). Most other wheels use 16S packs, so the similar values are 57.6V (calculated with 3.6V per cell) to 59.2V (3.7V per cell) nominal voltage, and fully charged around 67.2V (calculated with 4.20V per cell). For battery watthour calculations, I've seen usually a rounded value of 60V is used. Link to comment Share on other sites More sharing options...
DangerousDick Posted December 6, 2015 Share Posted December 6, 2015 1 hour ago, Cegalo said: By the way, how can I check that my NB1 serial number is a real E+ and not a fake E with a 320W battery? Hi Cegalo, Your serial number ends 7560, my first one ends 7534 (same first bit) and was (is!) a genuine E+ so I'd put money on it that yours is the genuine article as I can't imagine them building more E's after starting a 'run' of E+'s? Cheers, Richard. Link to comment Share on other sites More sharing options...
Cegalo Posted December 6, 2015 Author Share Posted December 6, 2015 Thank you very much, you two!!! Link to comment Share on other sites More sharing options...
SuperSport Posted December 6, 2015 Share Posted December 6, 2015 7 hours ago, Cegalo said: ...61.44V... Mine is 61.92V Fully Charged Link to comment Share on other sites More sharing options...
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