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  1. S

    A123 20Ah Prismatic Cell, outside wrap loose?

    I just found a cell laying around on the top of a shelf, it's been there for about 1 year and a half, the wrapping(grey plastic) that seems to go around the cell is loose, it's no longer sticking to the inside of the cell. The voltage is still 3.246V. I also find that it's a lot more flexible...
  2. S

    A123 AMP20 Battery Pack Build...

    Here is a picture gallery of my AMP20 Battery Pack Build... Each packs are 5P12S for a total 5P24S when both packs are connected together. Let me know your opinions :D
  3. S

    7.9 mOhms 5P12S 20Ah Prismatic...

    I just got done doing 1 pack, second pack for other side on my kart should be done tomorrow... The complete Impedance that my pack is giving me is 7.9mOhms, is that good for a 5P 12S Prismatic A123 AMP20? Let me know, I remember seeing it was good, so let's see our reader's/writer's opinions.
  4. S

    14S BMS for LiFePo4

    Hi, I am looking for the best/lowest cost BMS for a 14S LiFePo4. I would love LVC and Balancing.
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    A123 20Ah Prismatic Cells

    Hi, I am currently purchasing some 20Ah Prismatic Cells, I did a Ah test on the top grade version and they are very close to the 20Ah. I am wondering if any of you are interested in purchasing with me, I am buying them for $55.00 USD + shipping. Let me know.
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    Heat Shrink Wrap...

    I am looking for a source on Hear Shrink Wrap, anyone has a good source? I am looking for decent prices and lots of choices, I want to buy multiple different sizes.
  7. S

    36V BMS and Charger

    I am looking for a 36V 40A draw BMS and a charger, can you please help source this? I have been looking around here for 1 hour and can't seem to find one. Thank you in advance
  8. S

    Tungsten Electrodes...

    Hi, I got myself a home built spot welder(LEDhacks version) and I bought some tungsten rods to make tungsten electrodes to spot weld nickel tabs to copper buss bars... Now I can't spot weld the tabs to the batteries anymore due to the tungsten sticking more to the tab then the tab sticks to...
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    Copper or Brass?

    I am currently working on finding my self the correct bus bars needed for my packs. My draw amps will be 450-500 amps, Should I use Copper(expensive) or Brass(cheaper), or can I use Brass with not to much resistance? What size should my bus bar be? 3/4" X 1/8"? 3/16"? 1/4"? Please let me...
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    Battery Design and Layout...

    Hi, I must design a battery pack that will have 39.6V nominal(A123) and 46Ah. Which mean it's either 20P 12S or 12S 20P. What do you guys suggest I do, am I better with 20P 12S or 12S 20P? I will have to buy a BMS/Balancer so which setup should cost me less. I will also be pulling close to...
  11. S

    Needing BMS

    Hi, I have two 20S12P packs that I would need to have a BMS or Balancer for charging. MY total draw amperage per pack is 450A-500A. Which BMS or Balancer would be the best? Thank you, Sylvain
  12. S

    I am having a problem and I need some help...

    I am working on a E-Kart, it's a racing Go-Kart converted to a Electric Kart. My setup is the following: Alltrax Controller(7245) and a D & D Motor(ES-15-6). Batteries: 20P24S A123 26650 taken from Dewalt's A123 outputting 79.2V nominal and should be able to take a total draw amperage of...
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