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  1. P

    Two Speed hubs - Bafang ??

    Hi - Did the two speed thing go anywhere? there was an Xonda that had problems, & I see Bafang is offering the H700. Has anyone tried or seen it. Or come to that were the Xonda's faults sorted. Or is it better to just throw a few more amps into a single speed geared eg. the Q128 from...
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    Series Parallel Battery & Open voltage controller

    Regarding the series - parallel, shift on the fly idea, it occurred to me that a large geared hub motor with freewheel clutch may be a better candidate for this as no back drive from the road wheels to keep back emf feeding into controller. An idea like the 'tacho generator' that monitors an AC...
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    Series Parallel Battery & Open voltage controller

    Thanks bionx, will study further when I have more time, seems there are many Sony Konion types. eu.nkon.nl/rechargeable/18650-size.html I am amazed they can run successfully with no BMS Have bought Panasonic NCR18650PF from above.
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    Series Parallel Battery & Open voltage controller

    A lot of good thoughts here, thanks. Sorry in the delay - internet has been down in my area. It seems that the 'shift on the fly' concept is the most difficult part to achieve. There have it seems been other attempts at these 'reverse trikes' BUT the main problem in my area is the transition...
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    Series Parallel Battery & Open voltage controller

    Interesting, bionix 1954, you have done the set up. I wonder what the 'c' rate of the Bosch battery is? I presume there is no problem in seriesing up the two Bosch BMS controlled batts (I was told that two BMS controlled batts should not be put in series). I am thinking that 40A can be happily...
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    Series Parallel Battery & Open voltage controller

    Only advantage I see is cost, a 72v 30A battery would be more costly than two 36v 15A. It was a cheapness idea to get both high amps when needed & higher cruising speed when on the flat. I have found that a motor only draws about 6A @ nom 36v on the flat once up to speed pulling a 200 Lb rider &...
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    Series Parallel Battery & Open voltage controller

    As more amps = more torque & more volts = more speed, I came across an 'open voltage controller' - I thought of this, two nom 36v batts @ 15A max each, to be connected via relays either in series or parallel to give 72v @ 15A for high speed on the flat or 36v @ 30A for serious hill climbs. I...
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    Crystalyte 408 w water damage - advice req

    Is it water damage, or has the motor been overheated at some time, thus melting the insulation? You should read about the same ohms value across any two of the three heavy phase wires, & no circuit to the metalwork from any phase. Also you might smell a burned motor smell from it. If the motor...
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    Battery not charging, charger shuts off. help please

    I have had this problem a couple of times, ie battery will run the bike but not accept charge afterwards. Both times it proved to be one of the little positive multi plug wires detaching from its cell. To best detect this I removed the multi plug from the BMS. I taped a sewing needle to the pos...
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    Old 408 Motor, Max Amps it can take?

    Sadly no, mine is an old model with much thinner wires, I am probably going to wait for the Lebroski sensorless as it seems promising. Probably going with the Golden 409 clone at first on this. I also have an old British TGA crank drive (built into an identical 20'' folder as the Golden hub...
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    Old 408 Motor, Max Amps it can take?

    Thanks skeetab, would this conversion table http://tuxgraphics.org/~guido/javascript/awg.html be right in giving me the sizes & metric equivalents of the AWG sizes you recommend? Oddly enough the one you say to use is the one xlyte now use in the 408 but in metric (2.5mm CSA) I have had the...
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    Old 408 Motor, Max Amps it can take?

    Thanks for the interest, I will likely include the digital thermometer - I have one somewhere - this really only possible if I replace the feed wires. Am I on the right track going sensorless to allow thicker single insulated phase wires? What max temp should I aim to stay below? I have found...
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    Old 408 Motor, Max Amps it can take?

    I have a 408 in a 20'' wheel lying around. Dates from about 07 but little used. It is in its basic set up with factory 9 wire feed cable. Reading that he newer 408's can take many more amps & produce more torque I am wondering if the old and new models are similar inside. I see the motor phase...
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    Low KV Q128H at ridiculously high voltage? Which one (Alps)?

    It might be just my settings but I cannot get the details to open on the Adana site, See from the company news they have a 100Nm motor. Also that this company mentions a 800 to 1200W motor with a 1600 - 2400W motor under development (think it is brushless gearless aimed at the scooter market)...
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    JP spot welder

    Thanks for the video, very instructive in how to use. I am still interested but recovering from being Knocked off my bike two days ago!! Would surface shipping be any cheaper for sending the spot welders within the EU? - If a bit slower
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    JP spot welder

    No worries then re hydrogen. Thanks, I have two more questions:- Can this weld 26650 cells & 36650 cells - if they become a good option re the improvements in performance that 18650 cells have seen ( I am thinking of the lower internal resistance of a bigger cell??) Also can it weld NiMh NiCd &...
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    JP spot welder

    I am most interested in the spot welder (& look forward to the training video as this is new to me) One thing does worry me slightly, the evolution of Hydrogen gas within the automotive battery. Granted this is at its worst during charging (& indeed overcharging!) but I read from this that both...
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    Bestechpower BMS

    Thanks guys, I really wanted confirmation that the bms was as I thought. I had traced the sense wire from cell to its resistor but could not go further. I am only an electrician / wireman, not an electronics guy. I have as yet no price from BesTech but believe two boards may be the min order. I...
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    Bestechpower BMS

    Attached is info & wiring diagram on the Bestech 10S li ion D178 bms . I did ask if it is of the shunting type, Ada Li asked for clarification on what shunting type meant. I fear my answer has only confused the issue further. Could anyone on here confirm the type of bms (I guessed shunting from...
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    Shunting Vs Smart BMS? Budget 18650 Build

    Thanks, Nobuo It is the BMS that Ping uses, the LED's are just what I want, & others say it helps with fault finding. I will be going with the 10s li ion version of the board
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    Shunting Vs Smart BMS? Budget 18650 Build

    I am looking for as simple & reliable a BMS as possible for a build using 18650 cells. I read of the Clean Power LLC BMS & would like something similar ideally with the LED to report when each cell or parallel group of cells is shunting (thus if a group cannot reach shunting voltage then that is...
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    Bestechpower BMS

    Has anyone used the Bestech D178 shunting bms http://www.bestechpower.com/37v10spcmbmspcbforli-ionli-polymerbatterypack/PCM-D178.html I am planning a build using Panasonic NCR 18650PF batts 3P10S or possibly 4P10S. This will be only my second pack build (first was 7070260 LiPo4 & a smart...
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    Big Batteries to Boost the Electric Grid

    I understand that huge semi liquid Ni Zn batteries are in use expermentally for grid storage, a pump constantly circulates the electrolyte to prevent dendrite crystals forming in the batt. The chemicals for the NiZn batt are much more freely available than lithium would be, & there is a...
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    My & Wifes bikes

    Other two are crank drive 20'' by UK company TGA, & Little stinker 2 Cycle Russian petrol motor (I machined rear sprocket set up myself from plate wheel & added my own tank & silencer (muffler). sadly worst bike is the crank drive as always in trouble & 50% loss of motive power throu worm primary
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    My & Wifes bikes

    My main bikes, first is 20'' folder with Golden HBM / small magic pie motor & home made 36v lipo4 pack, Second is 26'' with Q100 rear & Tongxin 175 rpm front (50+Nm if both running, & Lipo added)
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