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  1. Inwo

    Lto battery 24v 10s 60ah used-good $350 Altarnano USA

    Usa stock ships for $50 conus Balance lead pigtail and acquisition board included molex mx-150L 360a cont 600a pulse Totally potted, rugged design https://altairnano.com/products/battery-module/ Random samples test over 60ah @100a rate Singles $350. 8 pcs in ss shell 750lb on your freight $2,000
  2. Inwo

    Sevcon Gen 4 48v S4 or S6

    Trade for new S4 80v Gen4
  3. Inwo

    New smart bms connectors

    What is the new 2.0mm pitch connector used on new version bms? GoGo won't tell me. Grrrr. He did say that it was not jst-ph. I got a sample TE 2.0 with latch that does not fit. jst-phd?
  4. Inwo

    Pmac tuning

    I'm tuning a pmac which I have running smoothly. ME-3031 S6 Gen4 sevcon. Running in torque mode. Motor is stable when powered on at zero speed. With slight throttle F or R accelerates with about 10% torque. Runs away until braked to a stop. Pushing car in neutral F or R has same effect. Not...
  5. Inwo

    Polaris Ranger EV Sevcon help

    I have DLD and DCF from a Polaris Ranger to share if someone can help me get reverse to work. My Sevcon tech struck out last night. It should have been plug and play, transplanting the oem controller to a R&T 4wd vehicle, but it won't run in reverse. S6 48v Gen4 Sevcon controller running an 8kw...
  6. Inwo

    Induction motor sevcon gen4 issue

    8kw induction motor runs fine using s6 80v controller in 2000lb vehicle. Same motor runs great using s4 80v gen4 in <1000lb vehicle. S4 in the heavy vehicle chatters harshly at low speed and high torque demand. I don't know the proper term for this. Cavitation, cogging? Turning the drive...
  7. Inwo

    Sevcon Gen4 model designations?

    Anyone know if some Gen4 are specialized in hardware? I have some S4-sevcon 634a83203 Also S6 that have been tested with both induction motors and PMAC. - 634a85203 Would the "203" relate to encoder type? I have a chance to buy S4s - 634a83310 The S6 were matched to 8kw PMAC. If the S4 will...
  8. Inwo

    Review wanted for company based Israel

    Anyone heard of this company? I have a deal in the works, but bank transfer to an unknown company may not happen. D. Z. Systems Group + 972 54 4345868 www.dzsystems.co.il  "I am the owner of D. Z. Group  Annual turn over 18M USD so you can be calm. "  
  9. Inwo

    Over speed Pmac motor (also a.c. induction)

    I have a motenergy 3031 Pmac. Rated at 5,000 rpm max. Is one of the limiting factors heat? Or can it be programmed to run cooler, at reduced power. Motor is over double hp needed. A buddy has run it 7000rpm and it survived. The only issue is 100C after a few fast miles. I've been told that the...
  10. Inwo

    Active energy transfer balancing

    There are many new active balance boards showing up from China. I have tested most of them, if anyone needs an opinion before ordering. It was requested that I do a more thorough test of the potted 4s board by a boat owner using 4s 60ah LiFePo4 for starting battery. Getting to the end of test...
  11. Inwo

    Led tester/ 27v continuity/ 30ma source

    I built similar with a switch to change profiles in DeltaQ chargers. It has become so useful that I made one without the switch. Testing leds was a two person job. One to push the switch. A kid is stopping in today or tomorrow to learn how to fix led tvs. Made it for him, but it’s to nice. Let...
  12. Inwo

    Unknown (long gone) LiFePo4 cells 4lb 14oz

    Picked up a few hundred prismatic cells. Us made international battery. ~ 4 years old. Seem to be 60-80ah. I think I'm killing them, or at least mutilating the corpse, if the are already dead. :shock: The first batch yielded 80%. Brough them up slow. About 1 amp. Too fast? Then using 6 single...
  13. Inwo

    Altairnano LTO module autopsy

    This is what a $3K battery looks like inside. I'm after the sn.
  14. Inwo

    Battery packaging 11ah and 53ah LTO

    Testing some methods for packaging 11ah and 53ah titanate pouches. A 2p6s 12v 100ah in ammo box finished. The other is test fitting a 4p6s 12v 44ah in a similar box. Looks like a 72v 11ah will fit nicely in two banks. 32s to 36s. Or any combination of up to 36 cells in an wise tall ammo box...
  15. Inwo

    Pouch tab connection system

    Cad plated copper bus bars. Threaded 10/24 brass captive nuts and machine screws. Oxide inhibiting grease between layers. 2p shown connecting 4 tabs.
  16. Inwo

    4s 12v 100a bms

    First attempt using a cheap bms. Specs list protection at 3.65v I can only charge to 3.365. About 80% Lowered charge current to 5a into a 100ah gbs pack. Same thing. Does anyone now what is used for voltage Reference? Maybe, I should try a second one. I have 4pcs. Nice to have...
  17. Inwo

    Ultrasonic tab welding

    Thinking of acquiring a welder for aluminum lto pouch tabs. Anyone have information or sources. Found one for $3500 from China. Fits my budget if it works. I don't know what to look for.
  18. Inwo

    Chevy Volt module issue

    Any thoughts on this? I don't know the competence of the user. " Maybe you can help me understand something. I have a 2 kW segment from a Chevy volt salvage that was a 2013 model that I bought two years ago. I recently started checking individual cells to hook up the battery balancer and I...
  19. Inwo

    Electric Tractor

    Anyone into large vehicles? Fount this in salvage yard. (still there) Wondering what I could build with it.
  20. Inwo

    Bluetooth 10-15s bms review

    More testing of the China bt bms. Honestly can't find anything I don't like. Finished installing 100ah 14s pack in Tomberlin NEV today. 2016 Volt-as new. Balanced perfectly +- <5mv Cell #1 was 50mv low. Started balancing, then though to check with meter. All were perfect. The bt bms has simple...
  21. Inwo

    Bike suggestions

    For someone too lazy to build a bike. And too lazy to go over 1000 posts. Point me the right direction for performance electric enduro motorcycle. Is this a good start? https://laebike.com/collections/high-performance/products/edge-1500w-e-bike-30mph...
  22. Inwo

    3/16" tab punch

    Posted this in another thread. Thought it might deserve it's own. Home grown metal punch fits between hot tabs. 4 layers with ease. A little light for Volt tabs. Looking for a solution.
  23. Inwo

    Samsung EV batteries Fiat BMW

    Making second test. First full test of capacity. Ebay "new" 75v/75ah pack. My research shows 60ah. Seller claims there are no specs from his source. Only customer tests showing 75ah capacity. I'm not experienced enough to know whether nos pack need exercise to come up to full potential. First...
  24. Inwo

    Tomberlin 48v 5hp LTO data

    Went for first run in 48v Tombrerlin with lto batteries. 3.8kw/5hp motor 2p 24s 50ah Kokam LTO theoretical 5520watt battery. 2.3v X 50ah X 48 Top cell was 2.7 but most were at 2.6 Starting voltage 2.6 quickly dropping to 2.5 volts. 25 miles at 15-25 mph. Lots of plugging against speed limit...
  25. Inwo

    Wood battery pack

    Anyone look this Over? https://www.aliexpress.com/item/app-72V-60Ah-Electric-Bicycle-Lithium-Battery-BMS-Charger-Bluetooth-GPS-control-5V-USB-Port-Pack/32787127409.html?
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