3 ms·
Superchargers charge at 480V max, which from my understanding go directly into the cells (there's two phases in lithium battery charging, constant current and c
by xxpor 6y ago
Superchargers charge at 480V max, which from my understanding go directly into the cells (there's two phases in lithium battery charging, constant current and constant voltage. I'm fairly certain the constant voltage is for when the battery is low)
So technically not "high voltage" as defined by the NEC (that starts at 600V), but still plenty enough to kill you. Especially if you're wet.
- function_seven 6y ago> (...I'm fairly certain the constant voltage is for when the battery is low) Backwards. When the cell is low, the charging is at a constant current. The current is limited to whatever is deemed safe for the battery. Once the battery has charged to 80% or so, then the voltage will have reached the top, and any attempt to maintain the current will over-volt the cells. So the current is allowed to taper off as the voltage is held constant. For a single cell, that means the charger will apply whatever voltage is needed to deliver, say, 1 amp. Then when the voltage hits the 4.2V ceiling, it will stay there as the current naturally decays. A 100% charge is declared when the current falls below some threshold, like 50mA.
- xxpor 6y agoYeah, that makes way more sense, thanks!