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  1. passpato

    Testing a PAS sensor

    Thanks for the reply but I knew all of that except that most pas sensors clain they require a 3mm gap. I will try reducing he gap. I really want to know how the sensor works so that I can test it. Im guessing the possitive and negative wires go to a coil that provides a magnetic field. When the...
  2. passpato

    Testing a PAS sensor

    Can somebody help me please. I am repairing an ebike for a friend. Unfortunately its been messed about with before. Im pretty sure the issue is with the pas sensor or its curcuit inside the speed controller. The owner had already started fitting a new pas sensor and unfortunately I no longer...
  3. passpato

    Nimh 10 cell battery charger

    Slightly off beat for an EV forum. I have a 36v ebike and usually use this forum to discuss that but this question is about my 12v 10 cell Black and Decker Nimh drill battery charger. I need a replacement charger and the original is a constant current saturation charger. My charger is marked...
  4. passpato

    Speed Controller Repair

    I have a quality 36-volt brushed speed controller that I would like to repair. The Controller is a 4QD uni 8, and no longer supported by 4qd. I have found a burnt resistor on the circuit board which I will replace but I believe the problem started from the heatsink screws coming loose and the...
  5. passpato

    Ping 36 volt 10 AH

    I just wanted to sing the praises of Li Ping. My ping 36v 10ah battery is 8 years old now. Its installed on a Heinzmann powered Specialized mountain bike. It doesn't get used that much these days but has seen many deep cycles over 20 miles where the bms has cut power. I connected a Turnigy...
  6. passpato

    How does a BMS work?

    Thanks Amberwolf. As always you put a lot of effort in to your replies. It is appreciated.
  7. passpato

    How does a BMS work?

    I am wondering exactly how a bms works ? I understand that each cell is connected individually by the 12 (in my case) wires and I think that the leds alone bleed down the voltages on the individual cells untill they are equal. I know that the mosfets are opened and closed to control access to...
  8. passpato

    Ping 36 v 10 ah battery not charging

    It turns out the sells are ok. They are very difficult to squeeze that last bit of charge into them. I used an imax in the end. Ping is now sending a new bms as the old signalab will not allow charging. Does anyone know what goes wrong with this curcuit ? The fet seems to be working. I wonder if...
  9. passpato

    charging a ping with an Imax

    Does anyone know exactly haw to set an Imax to singularly cell charge my Ping 36v 10ah ? Its max charged voltage is 3.65 and it will charge at around 3.8v .I know how to connect to my cells through the balance wires but I can't find a correct setting for my cells and I'm confused by its menus...
  10. passpato

    Ping 36 v 10 ah battery not charging

    Ping cells are $9.30 or £6.17 each. Its 10 A/H so 9.30 x 2 = 18.60 18.60 x4 = $ 74.40 or £49.36 + shipping but I also need a bms.
  11. passpato

    Ping 36 v 10 ah battery not charging

    Can anyone recommend an economy single cell Charger for my Pings ? I'm in the Uk so 240v 50 hz . Or I have a PSU from a Computer to power a buck.
  12. passpato

    Ping 36 v 10 ah battery not charging

    Thanks Guys. it looks like this battery is near end of life.Or does anyone have a donor battery in the uk and can help us? Worth a try I suppose. My friend doesn't need a full charge 6 or 7 a/h would do . One last question. Ping tell me to charge at 3.8 -3.9 v . All the single cell...
  13. passpato

    Ping 36 v 10 ah battery not charging

    I have charged the first 4 cells at 39v as directed by Ping. I charged untill the current fell back on my power supply. It took a long time to charge each of these cells. I think they have a high resistance to charge. After resting these cells dropped back to around 3.3 v. Ping told me to use...
  14. passpato

    Ping 36 v 10 ah battery not charging

    Ping explained the charging period for these cells. They raise to 3.2 quickly and remain around there for a long time rising slowly. After they reach 3.5 they rise quickly to 3.9 . This can take 10 hours at 1 amp for each cell. After charging each of my 4 cells for 6 or 7 hours from the 3.2...
  15. passpato

    Ping 36 v 10 ah battery not charging

    I emailed Ping and they are helping me. Its great to have support but it takes 24hours to get replies because of time difference between uk and China. I think the battery is a Ping 3.2 . The ebike was left for over 6 months and the first 4 cell packs run the BMS (signalab).This has taken these...
  16. passpato

    Ping 36 v 10 ah battery not charging

    My friends 36v 10 a/h Ping battery will not charge. It is about 5 years old now. I thinkthe BMS is stopping the current flow. I have an identical battery and I am able to test things by swapping around and/or testing with a multimeter. The Charger works ok on the other battery so I'm ruling...
  17. passpato

    How to increase speed of Currie Izip Path E3+

    Doesn't the Curry use the bicycle gears? It drives the chain I believe. If so, you could change the gear cassette on the back wheel. To speed the motor up you would have to increase the battery voltage if the speeed controller can take it.
  18. passpato

    Quality 36volt lifepo4 charger

    The original charger is toast. It wouldn't charge and I shorted it and popped several components on the board. Mr Ping sent a replacement when it arrived DOA.
  19. passpato

    Quality 36volt lifepo4 charger

    Update. The charger stopped working again so I took the covers off and probed around with an ohms meter to test connections. I was amazed to find the supply lead is faulty. It looks bulletproof and has never been miss handled. I replaced it with a spare from a computer and its working again...
  20. passpato

    Quality 36volt lifepo4 charger

    Its working at the moment and I'm reluctant to mess with it. I understand there is a problem with the switching thyristor not earthing ? but I cant see it. It switches between 120 and 240 volts. looking at my old blown up one, There are two 3 pin transistors I think they are thermistors...
  21. passpato

    Quality 36volt lifepo4 charger

    The first charger would not work when it arrived. I had another PIng at the time and that ones charger did work. After Mr Ping sent a replacement I opened it up. I can't remember what I did to it but I blew several component on the board so It is definately useless now. The one that is in...
  22. passpato

    Quality 36volt lifepo4 charger

    The first charger was Dead on Arrival. Mr Ping replaced this one. The replacement shows the red light when connected but did not charge . I managed to make it work after I got it back from the TV repair man by picking it up and moving the external wires around. Im not sure what I did but I now...
  23. passpato

    Quality 36volt lifepo4 charger

    I am looking for a new charger for my Ping lifepo4 36 volt 10ah battery. I have replaced the charger twice now and I have lost confidence in the Ping charger. I have had the charger looked at by a tv technician but he says the price of a new one doesn't warrant too much investigation. I then...
  24. passpato

    Yorkshire England

    This may be the problem. http://electricmotorcycles.co.uk/zero-x-battery-technical-problems/
  25. passpato

    Yorkshire England

    I have found some information about a problem with the crimp joints in the battery conections. I suspect this is the fault but Im unable to get to the bike. Im waiting for a reply from Tench.
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