SuperCharging upgrade

Discussion in 'Tesla' started by bwilson4web, Mar 12, 2019.

  1. bwilson4web

    bwilson4web Well-Known Member Subscriber




    Front-loading charging power and added range in this way is more efficient overall than delivering the peak power at 60–80% state of charge as many other EVs do. This happens mainly because most non-Tesla EVs spend the majority of the charging cycle at power levels that are in fact limited by the maximum current (amps) of the charging hardware, and the pack voltage — which cannot be adjusted post-hoc — is gradually climbing throughout the charge session. Recharging a battery is by definition lifting its voltage back to maximum potential difference (volts). As a consequence, on a charger whose current is maxed out for most of the charging session, the peak power is necessarily somewhere in the second half of that session, when the voltage is closing in on its peak. Newer and more powerful public chargers are improving this by moving to much higher levels of current (amps) delivery, up to 500 amps in many cases. This may allow some EVs to change the shape of the charging curve. Tesla designs both the vehicles and the chargers, so can have a more coordinated approach to this optimisation task than any other EV maker can.

    Bob Wilson

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