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  1. K

    60kW 400V EV Motor Controller

    You could use an industrial frequency converter for this induction motor. Or take a look at sevcon. They have high voltage controllers too.
  2. K

    Motor with Electromagnets on Stator and Rotor?

    An induction motor is also a motor with electromagnets on the stator and rotor, The current in de rotor is induced via the stator windings.
  3. K

    SilentEnduro conversions

    Hello, Your projects are looking great! Where do you get your NCM 55Ah cells from? and what current can they handle? Charge and discharge?
  4. K

    LiFePO4 / Li ion Parallel pack, A123 hybrid for HighPower

    What Motors are you using? Is there a better alternative to the me1616 with about the same power level? Thanks, Stan Seuren
  5. K

    LiFePO4 / Li ion Parallel pack, A123 hybrid for HighPower

    According to this document the cycle life isn't much longer with a lower charge rate, They even say the batteries operate better at high currents. http://www.mdpi.com/2032-6653/6/3/653/pdf As for the temperature maybe watercooling is an option, i'm looking for a cheap cooling method between...
  6. K

    LiFePO4 / Li ion Parallel pack, A123 hybrid for HighPower

    The ANR26650m1b cells especially with their 4C fast charging capability with almost no difference in cycle life, then when used under 1C charging. The 15min charging time almost makes me wanna make a second pack consisting of only A123 cells for super high power and ultra fast charging between...
  7. K

    Wire Bonding machines

    I have searched for them in the past but too expensive unless you have high demand for alot of the same batteries.
  8. K

    LiFePO4 / Li ion Parallel pack, A123 hybrid for HighPower

    But the LiFePO4 parallel packs may be a solution because if you add a 4p pack of A123 you've got 200Amps continuous extra with a relative small pack. If I add that to the 20P li-ion pack that is capable of around 200A continuous, i've got 400Amps
  9. K

    Common pack design mistakes, how to avoid?

    Lot's of BMS's aren't doing there job correctly, it's alot of extra electronics that could fail and lot's of extra soldering work... and the bms's need space too. The main disadvantage is space and lots of extra soldering.
  10. K

    LiFePO4 / Li ion Parallel pack, A123 hybrid for HighPower

    You mean that the LiPo battery saved the A123 cells from deep discharge? Or the other way around? Thats a good way of thinking but like you said already: when you use the automotive batteries the layout is predetermned and in most cases not ideal for e-bikes and e-motorcycles. The cost isn't...
  11. K

    Ebike charging connector

    I agree :shock: .........
  12. K

    LiFePO4 / Li ion Parallel pack, A123 hybrid for HighPower

    So with your 23S LFP / 20S Li-ion you got the advantages of both right? LiFePO4: High discharge power Minimal voltage sag at the 3.3V per cell region Li-ion: High energy density What do you mean by automotive grade cells? like Nissan leaf, Chevy, Tesla and etc.?
  13. K

    LiFePO4 / Li ion Parallel pack, A123 hybrid for HighPower

    But those voltage differences are equalled out because they are in parallel.... Right, I know it doesn't feel right but in theory it should work. The main advantage of the LFP is the high power density. If we can combine the energy density of li-ion with this. In an electric mx bike high power...
  14. K

    LiFePO4 / Li ion Parallel pack, A123 hybrid for HighPower

    Have you read my example? I meant to put the 30S lifepo4 parallel with a 25S Li-ion So when the battery is fully charged the voltage is 103.5V. HVC Charged = 103.5V / 30 = 3.45V for the lifepo4 and 103.5V / 25 = 4.14V for the li-ion LVC Discharged = 75V / 30 = 2.5V for the lifepo4 and...
  15. K

    LiFePO4 / Li ion Parallel pack, A123 hybrid for HighPower

    Hello, I was thinking of making a parallel pack with LiFePO4 ANR26650M1B cells and Li-ion for example 35E cells. For example: 30S LifePO4 = 3.45V max per cell = 103.5V Fully charged 25S Li-ion = 4.14V max per cell (Good for long live)...
  16. K

    Samsung 40T and other cells like it?

    Hi rg, What do you think about the 25R against other cells, are they the best power/capacity/price cells?
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