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  1. T

    Help, Enerdel 12S pack fully depleted

    Well, how's this for a timely followup? ;-) This Enerdel 2P12S pack is still going strong (8+ years on). I have been using it off and on in the go-kart since this incident and have never had an issue with it. It has been sitting unused and uncharged for the last 1.5 to 2 years and I pulled it...
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    Ever use a Thunder 1220 to discharge/store?

    Duh, it has the discharge capacity right on the front! :roll: Thanks for pointing out the obvious. Apparently I will just need to ride the go kart to drain it :) -Tom
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    Ever use a Thunder 1220 to discharge/store?

    I cannot find any information regarding using a Thunder 1220 in regards to discharging or storage charging/discharging a battery. I am trying to discharge a Li NMC pack to 3.5V/cell but in discharge mode the charger only reads 0.81A (even though I have it set to 5.0A). I also tried the storage...
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    Help, Enerdel 12S pack fully depleted

    I didn't have time to charge to 4.2V on Saturday so I left them until today. They were at the charge state I left them, no observable discharge. I am continuing to bring the cells up to 4.2 and will run the go-kart and see how they behave when they discharge. So far they are still charging up...
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    Help, Enerdel 12S pack fully depleted

    Got to 38V and decided to put it on the normal LiPo balance charge program to 4.2V/cell. This gets the balance connectors onto the charger so I can watch cell voltage and IR from the charger. IR looks good on all the cells and all are tracking quite closely. Everything seems normal so far... -Tom
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    Help, Enerdel 12S pack fully depleted

    Still here, still charging, and no fire yet! Actually they aren't even a bit warm. The charger says the pack is at 35.5 V and pulling about 6.5A. The (damned) Celllogs are showing that the cells are still quite balanced. 2.953 2.984 2.974 2.967 2.976 2.978 2.967 2.963 2.962 2.976 2.970 2.970...
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    Help, Enerdel 12S pack fully depleted

    Well, there is a NiMh manual mode that allows setting the current. I set it to 8A and pushed go. It is outside and I am watching (with my fire extinguisher in hand).... -Tom
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    Help, Enerdel 12S pack fully depleted

    Thanks. Do you know if there is a way I can get my Thunder 1220 to ignore the low voltage and charge at, say 6A? I assume by 4A per cell you are talking about the "2P" and so about 8A ? at what voltage? -Tom
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    Help, Enerdel 12S pack fully depleted

    I have an Enerdel 12S pack I bought from forum member Major a year or two back. It has been a great battery! Over the summer I stupidly left my two Celllog 8S's plugged in. The battery is totally drained. The cells are reading less than 0.5V on my Thunder 1220 that I have been using to...
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    Power Supply for Chargers

    Newegg doesn't have it, but has better pics of it: http://www.newegg.com/Product/Product.aspx?Item=N82E16817167016 I am using a re-purposed modified HP ESP135 (12V @ 47A) that is working out great. I got two of them for $27 shipped. Otherwise I might be interested. Tom
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    Wiring 2 cellogs and chargers to 12s

    Cool, thanks. Tom
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    Wiring 2 cellogs and chargers to 12s

    Thanks that is what I had assumed. I like your idea of using 6 off each Celllog vs 8 from one and 4 from the other. Thanks! Tom
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    Wiring 2 cellogs and chargers to 12s

    Do you know of any 12S chargers? Thanks, Tom
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    Wiring 2 cellogs and chargers to 12s

    I have a 12S Enerdel battery that I purchased from Major on the forum, great guy to deal with by the way! I want to hook two Celllog8s to the pack. For the second Celllog8s do I connect the negative (first) lead to cell 9 negative (also cell 8 positive) or do I connect that to the cell 0...
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    Battery Pack Build - A123 ANR26650M1A Cell (B-GRADE)

    The A123 "Cylindrical Battery Pack Design, Validation, and Assembly Guide" document says this: "Cell Support Secure the cells in place by supporting their outside cases, not their terminal ends. The vibration induced between the terminal ends and the rest of the case has been shown to be...
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    Battery choice for go-kart build

    So, if you are willing to charge at a slower rate you can just use a charger or chargers on each cell and charge through the balance leads, rather than charge the whole pack? If you had 2 BC-168s, you could connect up all 12 cells and charge that way safely? How long would a full charge take...
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    Battery choice for go-kart build

    Again thanks for the info. Is there a BMS that is reasonably priced that you would recommend? Tom
  18. T

    Battery choice for go-kart build

    Thanks for the info. So are you saying that you didn't have a BMS but just watched your draw and balanced on a hobby-style charger, or something more sophisticated than that? Tom
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    Battery choice for go-kart build

    A few other questions on the Enerdel modules....Which would be more appropriate for my application: http://evolveelectrics.com/Enerdel_MP310-049_Moxie.html or http://evolveelectrics.com/Enerdel_ME330-049_Moxie.html I assume I need a BMS with 1 or two packs, yes? If so, which one would you...
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    Battery choice for go-kart build

    Is this chemistry less or more volatile than LifePO if mistreated? Tom
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    Battery choice for go-kart build

    Thanks for the info. Their 48V 20Ah pack looks quite interesting. I hadn't seen these before. From what I have read here on these they seem to be decent... -Tom
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    "kits" for 18650 or 26650 cells

    I was reading the A123 "Cylindrical Battery Pack Design, Validation, and Assembly Guide" document. It explicitly discourages mechanical fastening of cells on their ends. They discourage holding cells from their ends for two reasons, one because you cannot cover up the venting area of the cell...
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    "kits" for 18650 or 26650 cells

    You can buy A123 ANR26650 cells for $9.75/ea (there are qty discounts) from buya123batteries.com which have some impressive specs. There are also Feilong 26650 3.7V 4000mAh available (as well as FeiLong 32650 3.2V 5000mAh). I am not arguing that 18650 aren't more common, just that 26650s are...
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    Battery choice for go-kart build

    I am working on a go-kart, mainly for a pre-teen boy, and need to figure out what batteries to use. The motor is a Mars 10kW BLDC and have a Kelly KDL series (300A) controller. I want to run the system at 48V. Top speed isn't critical, though with the current gearing, wheels, etc...
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    "kits" for 18650 or 26650 cells

    agniusm has done a really nice job enabling reasonable pack builds using the AMP20M1HD-A cells. I am wondering if there are similar "kits" or easily repeatable reliable designs to build packs with raw (non-tabbed) 18650 or 26650 cells? Tom
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