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I'm also considering this since charging times are much quicker.
Not directly. If the charger is, like the vast majority of public charging stations, only capable of 500 volts, it can't charge your 800 V battery at all. How would a 500 volt source overcome almost 800 volts of battery voltage to push more charge in?As I understand, public chargers will still work on 800v systems, correct?
If you're asking whether existing modules can be connected in series to reach almost 800 volts... yes, likely, as long as there isn't an isolation issue somewhere that is okay at 400 volts and not at 800 volts. The cells themselves don't care about the pack voltage.My big question is...Can existing batteries be configured to an 800v pack?
I don't understand the desire for axial flux motors. They are harder to mount, heavier, slower and less efficient than a well designed regular motor. I'm sure they have niche applications but the hype and the reality don't seem to line up very well. A regular motor can do more than 40kW/kg steady-state when designed properly, but it does that by spinning very, very quickly. Axial flux is around 2kW/kg steady state.The Emrax is rated at 800V..
Not a voltage problem.It seems that 800v will become more mainstream as it allows for substantially quicker charge time. I just bought a BMW I3 and love it. However, the 30plus minute rapid charging time makes road trips a bit of a chore. I don't mind waiting alone, but I don't want to put others through this.
The onboard charger converts AC at 120 V or 240 V to the DC voltage required by the battery, so regardless of the battery voltage you can plug into charging stations (or even ordinary outlets) for AC charging - not DC charging. "Rapid charging" isn't a standard term, but presumably means DC fast charging; if your battery voltage is over 500 V you can't DC charge at most charging stations without an onboard voltage converter or a battery re-configuration system.As far as charging goes, as long as I have the onboard charger, I can plug in anywhere, correct? I have a BMW I3 and I can plug it into 110, 220, rapid charge station, etc...
For battery packs over say 200kWh it could make sense to go to higher voltages for the purposes of charging. We may soon start seeing vehicles with larger batteries like that especially in commercial vehicles.The only reason to go higher voltage in my book is to extract maximum HP out of your motor, if you have one that needs 700V, etc.
Dude, one more time - you are not getting faster charging by upping the voltage. You're maxed out at the battery pack, not at the power delivery. If you had a gigantic battery pack like Tesla Semi, then upping the voltage will be relevant.The faster charging will be a bonus when the stations are upgraded.