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Thread: range questions

  1. #11
    Quote Originally Posted by chris22104 View Post
    Thanks for the replies guys. I've initiated 3 standard charges over the last 5 days that I've had it (139 IR, up to 148 IR, as I'd indicated.) Then yesterday around 4pm, I hit it with the range charge (took about 6 hours more, and got up to 172 IR.) I guess I should have left it alone at that point, but right after the ring went to green, I unplugged it for 5 minutes to start it and look at all the driving screens to see what I could see. Then I plugged it back in, in the standard mode (ring still green,) and there it sits. I'll leave it plugged in and not start another charge cycle until I can drive it.
    And I'll see about getting the log files, and PM them to you Mark (thank you.) Give me a few days.
    I should have it on the road in a week or so. You guys mention discharging it fairly deeply. With an ideal range of only 172, how deep should I go, and should that be driven in standard mode? Then I'll do another range charge as you'd suggested, and see where it is at that point (and report back with the results.) Thanks again guys!
    I wouldn't ever try to drive down to zero, but I would think you would want to drive down to 10%
    Standard mode hides the bottom 10% of the battery from you - so when the ideal mode number gets low, just switch to range mode to see what the car really thinks it has left.
    Please also consider sending the log file summaries in Roadster Owner Based Study of Battery Pack Capacity Over Time

  2. #12
    Quote Originally Posted by Lancelac View Post
    A battery this out of balance could easily take a full month to balance, leaving it plugged in every second you aren't using it. When they replaced my battery (due to some defect found during a normal diagnostic), my standard charge was a good 40 miles less than my previous battery, despite assurances that the new battery had cells that were the same age or less as my old battery. Tesla's instructions were to leave it plugged in all the time, and the battery would balance itself at a rate of about 1 ideal mile per day. They were correct. Eventually, I got all those miles back and then a few more. Now it always charges up in the low 180s (standard). Tesla could tell you for sure by doing a test, but most likely you'll be able to remedy the problem over time.
    Would love to see your log files as well! As you prefer I can send back or post some charts of the change over time.

  3. #13
    So as far as settings (now that I did two standard charges and one range charge, and still can't drive the car for a week or so; all previously stated) and keeping in mind I only have the 110v mobile connector, if I'm going to keep it plugged in, should I set the mode to standard? (That's where I have it now, and the trim ring just stays green.) What sounds like the battery coolant pump has been on since last night; 22 hours after the range charge ended. It does not seem to want to shut off, no matter plugged in or unplugged. Is this normal? Furthermore, should I set the charge to initiate on plug in, or every night at, say 9pm?

  4. #14
    Senior Member cinergi's Avatar
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    Quote Originally Posted by chris22104 View Post
    So as far as settings (now that I did two standard charges and one range charge, and still can't drive the car for a week or so; all previously stated) and keeping in mind I only have the 110v mobile connector, if I'm going to keep it plugged in, should I set the mode to standard? (That's where I have it now, and the trim ring just stays green.) What sounds like the battery coolant pump has been on since last night; 22 hours after the range charge ended. It does not seem to want to shut off, no matter plugged in or unplugged. Is this normal? Furthermore, should I set the charge to initiate on plug in, or every night at, say 9pm?
    Pump will stay on after a range mode charge for some time -- possibly until it reaches 90% SOC (AKA a "full" standard-mode charge).

    You don't need to initiate charge at a particular time unless it costs you less. Otherwise just keep it plugged in and set for standard mode.
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  5. #15
    Thanks cinergi. So keeping it plugged in and set for standard mode and "charge at plug in," as opposed to setting a time, will it self initiate a charge once a day or something automatically?

  6. #16
    Senior Member markwj's Avatar
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    Quote Originally Posted by chris22104 View Post
    Thanks cinergi. So keeping it plugged in and set for standard mode and "charge at plug in," as opposed to setting a time, will it self initiate a charge once a day or something automatically?
    Chris,

    Yes, it will wake up once a day and top-off its battery if it feels it needs to.

  7. #17
    Quote Originally Posted by Lancelac View Post
    A battery this out of balance could easily take a full month to balance, leaving it plugged in every second you aren't using it. When they replaced my battery (due to some defect found during a normal diagnostic), my standard charge was a good 40 miles less than my previous battery, despite assurances that the new battery had cells that were the same age or less as my old battery. Tesla's instructions were to leave it plugged in all the time, and the battery would balance itself at a rate of about 1 ideal mile per day. They were correct. Eventually, I got all those miles back and then a few more. Now it always charges up in the low 180s (standard). Tesla could tell you for sure by doing a test, but most likely you'll be able to remedy the problem over time.
    I was told by someone on the forum that the battery does rebalance unless it is charging in range mode. So I am not sure why it keeping it charged all the time (I assume you were charging in standard mode) would help. But clearly it worked for you.

    Chris, what I found using the 110V charger was that I had to wait about 10 hours to fully rebalance after a full range mode charge. So don't unplug it for a while. It's annoying that you can't see what the car is doing and it doesn't give you an indicator that it is rebalancing but it is.

  8. #18
    Roadster #1144 + Sig 114 dsm363's Avatar
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    I thought the car balances after standard mode as well.

  9. #19
    Roadster 919, S 2006 Doug_G's Avatar
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    The car does balance the pack in standard mode, although it does a bit more balancing in Range mode. BUT I would not charge in Range Mode unless you're planning to drive it. Leaving it charged that high degrades the batteries.

    Balancing happens immediately after the charging is done, and reportedly can go on for an hour or so.

    I would strongly recommend leaving your car in Standard mode. It will top up once a day, and over time it will show more range. Feel free to drive it - just not so much that it won't top all the way up again each night (since you're using 110V). Over a period of time the range should increase.

    Only once your car's pack is reasonably well balanced, it might benefit from a Range mode charge. Generally speaking it's a good idea to do a Range mode charge once in a while, as in a few times a year, to get that little extra bit of balancing. That said, don't leave the car sitting with a full Range mode charge indefinitely. You should drive it a few hours after it's fully charged, to drain it back down to Standard mode charge levels.

    And I'd recommend getting set up for 240V charging. You don't need an HPC, just get a 50 amp stove plug and the UMC (if it didn't come with one).

  10. #20
    Quote Originally Posted by Doug_G View Post
    BUT I would not charge in Range Mode unless you're planning to drive it. Leaving it charged that high degrades the batteries.
    Definitely. My bad if any of my posts implied that you should charge in range mode and let it sit full. That certainly wasn't my intention.

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