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  1. minexplorer

    further investigation of battery cutting out before set LVC

    Hi neal.i didnt ride far enough today for a full test.However i was pleased to see i used only 6.3v of the 57.5v full charge to do 14.2 miles. that inc plenty of hills,pas2 mainly approx 18amps.with fair bit of 21-24amps, WOT & bit of PAS1..a good mixture basically.voltage drop on the display...
  2. minexplorer

    further investigation of battery cutting out before set LVC

    hi dave yeah i meant bms balancing not charger.i meant i could see the charger periodically turning on and off after green light.no never charged to less than 100% always green light plus few hrs, but i never had battery switched on during charging before.never saw the charger ever come back on...
  3. minexplorer

    further investigation of battery cutting out before set LVC

    update. after using a mobile phone charger to equalize all the cell groups i put it on a full charge. the charger finally went into balancing mode for the first time in the year ive had the 52v battery. didnt know battery has to be switched on to enter balancing mode and it was quite out of...
  4. minexplorer

    Kit recommendations

    i tried my 18amp 350w bbs01 set at 18mph but that sudden drop of assistance is unnatural the same as 15. because the assistance always allows you to keep reaching the cut off whatever it is. the only thing that feels right is totally unrestricted to the top speed your gearing allows. in my case...
  5. minexplorer

    Kit recommendations

    derestricting the speed limit is pretty easy except i believe on bosch.But the faster you go ,as ive found massively drains the battery.25mph will use twice as much as 13-15mph. i think you will need a cart for a battery than can deliver 12hrs of continous assistance lol.Dont believe the...
  6. minexplorer

    further investigation of battery cutting out before set LVC

    thanks sturmey.im trickle charging the cells all to the voltage of the highest one 3.50v with a 450ma mobile phone charger.then ill give it a full charge and a good balance.they should all reach 4.2v hopefully then. you are right, i did some math and worked out i was loosing the use of 5v of...
  7. minexplorer

    further investigation of battery cutting out before set LVC

    will check that for sure i was impressed with the 30Q s as battery would barely get warm after 2 mile hill climbs or long stretches of WOT. others were claiming GA batteries were getting hot under similar conditions.for a long time now tho ive been only using max for short blasts on hills...
  8. minexplorer

    further investigation of battery cutting out before set LVC

    thanks vfr.yes ive noticed the lcd voltage drops more than it did months ago when pulling high amps.will have to wait an see if they will all charge up to 4.2v and if this improves.Again tho how can less than a years use wear out a battery.im sure they are genuine 30Q cells as claimed by the...
  9. minexplorer

    further investigation of battery cutting out before set LVC

    Thanks for all this info Neal. Not switching the battery on when charging has brought this about i guess.Its never been balancing.Then once i found out it should be on there was some too large imbalances in place for it to rectify itself. Its such an important point but neither any battery...
  10. minexplorer

    further investigation of battery cutting out before set LVC

    i believe it has load resistors..7 things that look like fets from the bottom is all i can see of them.this also has 2 thin white wires going to the on/off switch.the charging info sheet talked of giving the battery a balancing charge every now and again leaving for 12 hrs after charging...
  11. minexplorer

    further investigation of battery cutting out before set LVC

    the charger info from electroncycles suggests its a balancing bms,as it says to balance the battery every once in a while by leaving it on for 12 hrs after charging complete. When i contacted them recently they said the charger may not go on and off during balancing as its not sensitive to go...
  12. minexplorer

    further investigation of battery cutting out before set LVC

    nice one neal ill try this while the batterys 'flat' get them all up to 3.45v .then see if they all reach 4.2v together on the full charge.when you say pin outs on the bms you of course mean the 16 wire plug that goes INTO the socket on the bms. just double checking.thanks
  13. minexplorer

    further investigation of battery cutting out before set LVC

    now ive ridden the bike til the LVC and rechecked the voltages it doesnt look so bad.12 cell groups between 3.35v & 3.45v. only 2 at 3.07v & 3.16v. cant find anywhere a full detail of how to do this mobile phone charger method to bring up individual cell groups. Anyone?
  14. minexplorer

    further investigation of battery cutting out before set LVC

    thanks sturmy.So is this device u used the same as what vfr was explaining to make in his reply. So do you drain each of the higher cell groups down to the lowest ones voltage one group at a time. Is this better than trying to use the mobile phone charger method to bring the low ones up?
  15. minexplorer

    further investigation of battery cutting out before set LVC

    Thanks vfr .This is probably childs play to a expert like yourself, but for me i wouldnt have a clue what im doing or looking for. Is this device to test the battery cells for whether they are worn out or simply out of balance? I have 3 36v batteries ,they have had years of use and all the cell...
  16. minexplorer

    further investigation of battery cutting out before set LVC

    thanks vfr ,that doesnt sound easy ,how on earth do i put it under load tho whilst performing fiddly testing with a meter,i can see a recipe for disaster in the making. It was from a reputable uk vendor..Electroncycles. They say enough on their site about genuine 30Q, GA cells only used in their...
  17. minexplorer

    further investigation of battery cutting out before set LVC

    Hi further to a previous post. Ive now opened the 14s5p 52v battery (11mths old)and checked the voltages of the groups of cells .battery was fully charged ,left on charger for 12hrs. 4.2 4.2 4.1 4.0 4.0 4.0 4.1 4.2 4.2 4.2 4.0 4.1 4.2 4.2 To recap the LVC was 41v ,it would run to that.used to...
  18. minexplorer

    XF07 36v 250w uphill performance

    A thin coat of solder on one leg of the shunt,not too much,a quarter of the shunt.this will raise the max amps by 4 or 5amps. you DONT want to go over 20amps. the smallest controllers should all take that. i bought a spare small 250w kt controller and thats factory rated 20amps .do you have a...
  19. minexplorer

    XF07 36v 250w uphill performance

    I can vouch for d8veh s..i mean vfr s advice. a blob of solder really makes a difference. it transformed my wifes 200w rated rear hub motor into pulling 800 watts according to the watt meter.no problems at 19amps.she can get that with the throttle.have you got a throttle.if not the controllers...
  20. minexplorer

    Help! bbshd ,battery? issue

    So its not a simple battery on off switch then? needs to be on when charging in the future or its not balancing correctly. if the display is the accurate voltage and the dvm is out thats good ,but the dvm at least shows the batts full charge is lower than the charger output by .6v. maybe future...