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Conditioning battery

Discussion in 'Model S: Battery & Charging' started by manis, Jul 10, 2015.

  1. manis

    manis Member

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    This has probably been covered somewhere, but I can't find a thread about it or the thread I originally saw it suggested.

    It was mentioned that charging to 100% every few months was good to ensure that all cells knew their max capacity and charging and usage would be more even. I don't remember the technical explanation they gave, but it seemed to make some sense.

    Is this still something that is recommended?
     
  2. Sogorman

    Sogorman Member

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    If I have learned anything around here, asking that question is like starting a debate on religion :)

    This is just me but I wouldn't charge to 100% every couple of months just for balancing. The car may not be able to accurately calculate the range (plus or minus a few percent) but you won't loose any actual range. I am of the believe that charging to 100% (especially in the summer heat) is not all that great for the pack.

    Just my two cents.
     
  3. manis

    manis Member

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  4. UberEV1

    UberEV1 Member

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    Since there are so many new owners joining the family, it wouldn't hurt to summarize some key takeaways from the many threads and posts on the topic:

    - Don't hang out at the extremes for very long (0% and 100%)
    - Charge as much as you like to 100%, but start drawing it down soon after charging reaches top
    - Similarly, charge up soon after reaching bottom
    - If you don't plan to drive the car for a week or longer, keep charge level in the med-high range (e.g. 60 to 80%)
    - If you think you have lost some max range, charge to 90% or slightly higher for 2 to 3 weeks
    - Most importantly, don't sweat it and enjoy your new toy

    Safe Harbor Statement

    - I am not a battery expert, just an avid reader of the posts here at TMC. The above are just common themes from many posts.
    - I use the above approach and my 2 year old, classic Model S with B vintage battery and 20,000 miles charges to a max rated range of 261 miles (new it was 265). It had dropped as low as 257, but the 90% tip seemed to improve the range for me.
    - How long is "very long" or "soon after" for hanging out at the extremes? Who really knows?? I would think several hours is OK, but not days.
    - All of the above may be taken with a grain of salt because each firmware update may be messing with our heads
    - And don't forget to enjoy your car
     
  5. manis

    manis Member

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    Thanks for the info. I should have named the thread balancing the battery since that was what I was really after. I charged to 100% and let it sit at the charger to balance and my 90% rated range went from 226 to 228 and it took about 35 minutes after the countdown finished before it was completely done. So that pretty much answers the question I have if it does anything.
     
  6. TexasEV

    TexasEV Well-Known Member

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    As long as you realize you're not treating the battery by doing this, you're treating yourself. It doesn't change the actual range, it just gives you a more accurate estimate of range.
     
  7. CHG-ON

    CHG-ON Still in love after all these miles

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    I have learned to follow the advice that I have seen here. I used to to worry about it, but now I don't. The car seems to be just fine. I think a 1-2-3 mi change in stated range is insignificant and probably doesn't affect real word world performance because there are so many variables when we are driving: temp, wind, speed, traffic, A/C, etc.

    Much more important to me to remember to PLUG HER IN AT NIGHT!!! I've screwed myself twice by being a bonehead in that area. It's rather embarrassing to miss a biz meeting because I forgot to charge.
     
  8. liuping

    liuping Active Member

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    If it is really balancing the cells, it should result in actual additional range.
     

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