TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

Anomalous charging rate reporting

Discussion in 'Model S: Battery & Charging' started by billarnett, Mar 10, 2015.

  1. billarnett

    billarnett Member

    Joined:
    Nov 15, 2008
    Messages:
    293
    Location:
    Emerald Hills CA
    As I was finishing my charge at the Fremont Supercharger today I noticed that it kept going for a while after reaching 100%, though of course at a very slow rate. But the charging rate display was weird:

    IMG_3411.jpg

    I didn't believe that it was really charging at 131 mi/hr so I switched the units to "Energy":

    IMG_3410.jpg

    Now it correctly shows 8kW which is more like 25 mi/hr. Where did that 131 come from? Anyone else seen anything like this?
     
  2. Cottonwood

    Cottonwood Roadster#433, Model S#S37

    Joined:
    Feb 27, 2009
    Messages:
    5,062
    Location:
    Colorado
    The mph charging rate is the average for the charging session and the kW is instantaneous.
     
  3. Kalud

    Kalud Active Member

    Joined:
    May 7, 2013
    Messages:
    1,004
    Location:
    Montreal, QC
    ... and the last portion of the charge once at 100% is pack balancing and can last for 30-60min at low Amps. If you're ready to go there is no need to wait anymore you won't gain anymore noticeable range.
     
  4. andrewket

    andrewket 2016 Founders XP90D AP1, 2016 SP100D AP2

    Joined:
    Dec 20, 2012
    Messages:
    5,359
    This.
     
  5. AndreyATC

    AndreyATC Member

    Joined:
    Dec 19, 2013
    Messages:
    418
    Location:
    NY, USA
    Anyone knows what the charging rate is for the last 20 miles before 100%?
     
  6. David99

    David99 Active Member

    Joined:
    Jan 31, 2014
    Messages:
    2,199
    Location:
    Brea, Orange County
    It goes down gradually, it doesn't stay at a fixed rate. It's been a while that I did a 100% charge at a Supercharger and I didn't keep track exactly what the rate was at any given state of charge. There are some videos on Youtube where people filmed the entire time of charging at a Supercharger. It's about as interesting as watching paint dry, but you could find one of these and scroll forward to the last 20 miles and see what the rate is :)
     
  7. billarnett

    billarnett Member

    Joined:
    Nov 15, 2008
    Messages:
    293
    Location:
    Emerald Hills CA
    It that something that should be done now to keep it balanced? What does that mean, anyway?
     

Share This Page