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  1. EVDragRacer

    Heavy discharge test ..2200 Amps !

    I'm sorry, but I would have to disagree. The market for safe chemistry high power cell modules is growing daily. And K2 cells are not 2.5 times the $$$. Can you build a 10P 24S small module from Calb? No, but K2 Energy cells match the A123 M1 cells and can be built in any configuration.
  2. EVDragRacer

    Heavy discharge test ..2200 Amps !

    If you want maximum torque/ HP the K2 Energy Power Modules cannot be beat, even at 73AH the density is not bad. You will never match K2 Energy Power Module's power with any Calb unless you run them in parallel, but if its density you wish for than there is even cheaper cells than Calb. The...
  3. EVDragRacer

    Heavy discharge test ..2200 Amps !

    The data supplied by K2 Energy has been verified by many third party testers, including Elithion. In regards to twice the AH you can parallel two 73AH K2 modules and create the same weight, same AH, but the K2 Energy modules would have twice the power! Calbs do not match-up to K2 Energy.
  4. EVDragRacer

    Heavy discharge test ..2200 Amps !

    They are impressive cells, but the weight at 12lbs each is twice as heavy as: K2 Energy Cells LFP 73AH Power Battery (1P) (28P of LFP26650P) AKA: LFP 300HPS 6.61 lbs each For 1800A sag = 2.3V 2500A sag = 2.0V 3000A sag = 1.6V...
  5. EVDragRacer

    Puffing A123

    Just curious guys, Vicpower Chinese A123 cells have been proven to be rejects and puff/ leak on many applications, why are you still wasting your money? The DIY Forum did a complete Thread on damaged Vicpower cells, most will fail in time.
  6. EVDragRacer

    Ultra-Power Lipo Cells Now in Stock USA!

    Show me another 6AH cell sold in single cells with large tabs that can produce 300amps and not drop below 3volts per cell?
  7. EVDragRacer

    Ultra-Power Lipo Cells Now in Stock USA!

    The Haiyin cells can give you a burst rate of 65C, but the sag is the problem. I would like to keep my sag no lower than 3.3V per cell, so at 250amps per cell I get 3.3volts.
  8. EVDragRacer

    Ultra-Power Lipo Cells Now in Stock USA!

    Yes, when building a large pack 3000amps+ you need large tabs, this has been confirmed by Luke, Thomas Cook (Lithium Start), etc...true engineers in their field. You on the other hand tell people they can build the largest pack ever just by connecting the balance leads on series packs, well my...
  9. EVDragRacer

    Mixing Battery Brands in one Pack?

    You guys have been very helpful over the years and I need your advice again. I am very curious if I can properly build a battery pack with two separate brands of lithium polymer cells. The brands would be split into two separate packs equal amps, and connected in series. So, another words to...
  10. EVDragRacer

    Warp Factor II Battery Modules

    We have decided to stick with our 10P packs and build two separate packs for each Shiva. The picture shown above will not happen. Our 10P batteries cannot be separated so I am drilling & tapping in three location on each 10P side. Plenty of copper to work with, the new series connection method...
  11. EVDragRacer

    Warp Factor II Battery Modules

    I'm glad you are following me so closely, can you scratch my azz since your so close? :P
  12. EVDragRacer

    Ultra-Power Lipo Cells Now in Stock USA!

    Yes, you are correct. We can pull 300amps per cell safely with a 3.3v sag. So, we know now that a 3000amps battery pack will deliver 3.3 volts per cell. Our new design for 2013 is two smaller pack for each Shiva, most likely 10P 65S each pack. :lol:
  13. EVDragRacer

    Warp Factor II Battery Modules

    Very little, pack is stiff. Temps only rose to 35c to 40c after each run. The EMUS BMS worked flawless! Will be getting data at EVCCON, they back to the track at full power. :shock:
  14. EVDragRacer

    Warp Factor II Battery Modules

    This is info I received from an expert in the field. "Ron, Yes, the controller is perfectly capable of delivering 3000A to the motor while only drawing 2000A (or even much less) from the battery. All that is necessary is that the motor voltage be 2/3rds the battery voltage when it does so. If...
  15. EVDragRacer

    Warp Factor II Battery Modules

    The data will show what is needed. I definitely agree that more voltage will be needed to get more motor amps.
  16. EVDragRacer

    Warp Factor II Battery Modules

    The pack delivered 4000amps with ease.
  17. EVDragRacer

    Warp Factor II Battery Modules

    I agree Luke. These runs were just shake-down runs to check for damage. The pack work flawless and the car launched nice. Last year we ran a 1.4 60', 10.08 1/4 mile @ 128mph with the same settings. The car is a little lighter, but I experimented and installed 3.00 rear ring & pinion, compared to...
  18. EVDragRacer

    Warp Factor II Battery Modules

    Additional test day information: Battery only dropped about 7 volts per run. Cell temp remained under 50c. No sparks from motors or brushes. Controllers worked flawless (I think, no data). Car developed a clunk in rear diff, will check ring and pinion. Might also change front springs. Wish I...
  19. EVDragRacer

    Warp Factor II Battery Modules

    Well, just returned from the track. Good day of testing, completed two shake-down runs. Track was swamped today with Gamblers, etc....Only problem is no data, the wire was too short would not reach the computer, will have data on next test. Results: Test #1: 1500 BA (each controller) 2000 MA...
  20. EVDragRacer

    Petition A123 Systems for factory access

    I will sign the petition. I will not buy any shares, I lost a ton of money in A123, gained a ton of money when I bought Tesla stock the morning they IPO. I have heard from Bill Dube that A123 has produced a new cell 36grams that can produce 500amps, anyone know of this product? :P
  21. EVDragRacer

    Warp Factor II Battery Modules

    The Soliton Shiva will provide data from each run.
  22. EVDragRacer

    Warp Factor II Battery Modules

    I want to give some weight number from our pack modules: 10P 1S (3.7n 4000amp) 10 cells = 3.5 lbs Copper = 1.5 lbs Each 10P = 5 lbs 35S 147V Pack = 185 lbs est.. 54S 227V Pack = 280 lbs est.. 80S 336V Pack = 420 lbs est..
  23. EVDragRacer

    Warp Factor II Battery Modules

    Thanks I will give it a try!
  24. EVDragRacer

    Warp Factor II Battery Modules

    Shoot, I just realized I cannot run this load tester on my entire pack, it is designed for 12V battery. Need to buy better equipment for higher voltage testing. :(
  25. EVDragRacer

    Warp Factor II Battery Modules

    Yes, I can video tape the BMS Monitor screen which will allow me to see each cell's voltage and each cell's temperature. Will try this Monday or Tuesday. Our first drag race will be this Saturday at Lebanon Valley Dragway.
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