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  1. #51
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    Nicely done. Any plans to try 60v?
    Team Mavic, winner of the 2003 Cycle to the Sun race

  2. #52
    Senior Member The7's Avatar
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    Quote Originally Posted by Lowell_ View Post
    Nicely done. Any plans to try 60v?
    The AL1020 seems able to take 60V battery. May plan to see how it behalves at 60V on bench test.
    But don't think that I am going to road test at such voltage because it is beyond the safety limit of the foldable 16" ebike on road.

    Have had 125CC Ducati and 160CC Vespa in my young age but gave up motorcycling after migration.

    If it is on an regular e-bike with very good brakes, then it will be an different story.

  3. #53
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    Is the front fork steel? It would be easy to add disc brake tabs...
    Team Mavic, winner of the 2003 Cycle to the Sun race

  4. #54
    Senior Member The7's Avatar
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    Quote Originally Posted by Lowell_ View Post
    Is the front fork steel? It would be easy to add disc brake tabs...
    XXX No. It is aluminum. XXX

    Correction.
    Further testing with magnet, the front fork/suspension is steel.
    Last edited by The7; 08-28-07 at 05:36 PM.

  5. #55
    Senior Member The7's Avatar
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    Quote Originally Posted by The7 View Post
    No. It is aluminum.
    If I want an faster ebike, might convert this Terk of VW.
    What do you think?
    Attached Images Attached Images

  6. #56
    Senior Member The7's Avatar
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    Shopping for 2X12V12Ah SLA battery yesterday.

    Went to two electronic shops at Main St for such shopping. What an unpleasant occasion!

    The first Chinese one does not have them in stock. They were very helpful and willing to order for me. But it could take 1 week or so.

    So I tried another one close-by. They had them in stock. I was preparing to buy them. But I requested to check the terminal voltage first using their DMM. The young guy was helpful and willing to let me check them. But the old guy was very angry and scolded the young guy for letting me to do the checking. I felt sorry for the young guy and left empty hand. But I felt more sorry for the old guy of his mentality.

  7. #57
    Senior Member The7's Avatar
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    Quote Originally Posted by Lowell_ View Post
    Is the front fork steel? It would be easy to add disc brake tabs...
    Further testing with magnet, the front fork/suspension is steel.

  8. #58
    Senior Member The7's Avatar
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    Quote Originally Posted by The7 View Post
    Shopping for 2X12V12Ah SLA battery yesterday.

    Went to two electronic shops at Main St for such shopping. What an unpleasant occasion!

    The first Chinese one does not have them in stock. They were very helpful and willing to order for me. But it could take 1 week or so.

    So I tried another one close-by. They had them in stock. I was preparing to buy them. But I requested to check the terminal voltage first using their DMM. The young guy was helpful and willing to let me check them. But the old guy was very angry and scolded the young guy for letting me to do the checking. I felt sorry for the young guy and left empty hand. But I felt more sorry for the old guy of his mentality.
    At last, I bought two new 12V12Ah battery to replace the temperary car starters.
    They are placed inside the red bag.
    These new 2X12V will be connected in series with the stock 2X12V to form 48V battery for AL1020.
    The new 2X12V will be connected in parallel with the stock2X12V for charging by the smart charger (24V 1.8A).
    Now the charging time will be double 12-16 hours (instead of 6-8 hours).
    Attached Images Attached Images
    Last edited by The7; 08-29-07 at 06:51 AM.

  9. #59
    Senior Member The7's Avatar
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    Road test with new 2X12V and stock 2X12V batteries (as 48V)

    This morning:
    Weather = very good
    Temp = 20 C.
    From home to UBC, around UBC campus and return = 39 km

    Pushing very hard on way to UBC.
    Could cruise at 45km/h on flat.
    At such speed, the 16" ebike was not very stable due to side-wind.
    On the way home, kept the speed at about 35km/h to conserve energy.
    The ebike was pretty weak at the last 3 km near home.
    Could only do about 20km/h.

    Voltage of batteries at the end:
    1) Stock batteries : 11.74V and 11.74V
    Very balance.
    2) new batteries : 11.58V (weaker than stock)
    10.98V (very poor, will need to recondition by
    charging on its own.)
    The stock ones are BB batteries which seem to be very balance and good.
    The new ones from a different make (also from China)

    Comments:
    1) The 16" foldable ebike has reached its safety speed limit with 48V battery.
    2) Riding very hard could give a range of 35km for 48V 12Ah battery.
    3) Ridjng at easy could give a range of 50-60 km.
    4) The modification costs an extra of CAD 200-250 for 20A X-controller, 2 new batteries and connectors. There is a lot of research work in order to implement the 20A X-controller sucessfully for AL1020 ebike.
    5) Seems that the economical way upgrade is simplily to add an extra 12V 12Ah battery (about CAD50-) and the ebike is still within the legal speed limit in Canada.

  10. #60
    Senior Member The7's Avatar
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    The stock 12V are very balance at the end of usage, say 11.74V and 11.74V.
    Always within 0.01V different. They are charged and discharged in series.

    The two new 12V are very poor. At the end of the first usage. one read 11.58V and other 10.98V. They were charged in series prior fisrt uae.
    Perhaps after a few cycle of usage, they could become more balance.

    I try the following to balance the new batteries.
    Charge them in parallel using an 12V charger. Each is wired through 1 ohm res to the charger.
    In this way, the terminal voltages of each battery will tend to be the same at the end of the charging. Same terminal voltages would means the (nearly) same Ah stored in the batteries.

  11. #61
    Senior Member The7's Avatar
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    Today, the new batteries are very balanceat 13.24V and 13.25 V at FULL charge which are same as the stock batteries (also 13.24V and 13.25V when FULL).
    See what will be the voltages after a ride.

  12. #62
    Senior Member The7's Avatar
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    Since upvolt from 24V to 48V for my AL1020 the throttle is Ok for open road. But it is a bit rough on slow paths and sidewalks where the max speed is less than 20 km/h.

    So added an DPDT switch to switch the batteries in parallel to get 24V 24Ah for "norma"l mode and in series to get 48V 12A for "turbo" mode.

    When the battery is weak at the end of the day normal mode could help to cruise home at a lower pace.

    Try them work as intended.

  13. #63
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    Question please

    Anyone could explain details about how to wire in series one extra SLA 12V battery to get this 36V set... I mean exact wiring, not just general idea. And this extra battery, how do you charge it, do you use original Schwinn charger included with the ebike (I just happen to have bought this exact Ebike model a few days ago but need extra power to climb hills) or is there any setting required, special material or whatsoever? Thanks, Denis, Canada, QC

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