I have an Alien Auroa electric bike powered by a 36v 10amp lithium battery which is showing 41.6 volts. When I turn the power on all the red lights come on. I turn the throttle and the motor starts but cuts out after 30 secs. After waiting a few minutes the power lights up again but the same thing happens. The battery voltage remains at 41,6 volts. I have tried the peddle power without the throttle but the motor cuts out after 30 seconds as before. I am at a loss as to what is wrong and would appreciate any help and advice from the members. I have been told that Alien have stopped trading so I am not expecting any help from that quarter. cheers aggie
power cutting out after 29 seconds
- Thread starter aggie
- Start date
Could be a few things. Does it do this with the wheel held up (i.e. without you on the bike)? Could be the battery sags below the low voltage cutoff of the controller, then it resets and starts over again. that would point to the battery.
Or could be the controller is faulty. Hard to measure but try to measure the battery voltage when it does this 29 second reset.
Or could be the controller is faulty. Hard to measure but try to measure the battery voltage when it does this 29 second reset.
Hi Paul, I have carried out the following experiments. I recharged the battery to 41,6 till the charger turned green. By use of full throttle with no load on the wheel (up on stand) the motor cut out straight away at 38/39 volts. By gentle use of the throttle I managed to keep the motor running but this was intermittent and shut down after a few seconds. I live in Tenbury wells and without a spare battery to try I cannot say for sure whether or not I need a new battery so I am loath to splash out on a new Battery at £350 + until I am sure.
You and D8VEH are possibly right but if I buy a new battery and its not the battery I will not be best pleased, to put it mildly. Cheers aggie
You and D8VEH are possibly right but if I buy a new battery and its not the battery I will not be best pleased, to put it mildly. Cheers aggie
Hi flec, Its looks as though I have got to bight the bullet and cough up. As anybody any idea's on where to get the best price of a new 36v 10amp Lithium Battery for my Aurora the only one I can find on the net is from Holland Silent-Force.eu at 399euros (£365) including postage. I saw a Silent-Force SF 0103 electric bike on sale at the range for £499 which looks similar to my bike and uses the same type of battery and casing Does anybody know anything about this bikes? cheers aggie
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Deleted member 4366
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The batteryo n the Aurora is a dead standard Chinese battery. IMHO, it was under-specified. The BPM motor you have needs a stronger battery, so don't get a direct replacement. Ideally, you want to chuck that hideous rack as well, but that will involve a bit of DIY to install a new rack and re-mount the controller. Are you able to do something like that?
This one looks very promising. It might fit your present rack, but you still have to wire a connector. can you measure your battery?
http://www.bmsbattery.com/packs/657-36v-10ah-lithium-ion-alloy-shell-ebike-battery-pack.html
This one looks very promising. It might fit your present rack, but you still have to wire a connector. can you measure your battery?
http://www.bmsbattery.com/packs/657-36v-10ah-lithium-ion-alloy-shell-ebike-battery-pack.html
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Deleted member 4366
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It's about 5 times more powerful. You can't go by size, voltage and capacity
The key characteristic is the discharge rate.
The key characteristic is the discharge rate.
BMS also do a 36v 15ah aluminium case if you scroll down to 3or4,this is the one I will get when my battery is done on my alien auror,don't know if i will have to upgrade contoller.
Hi gerryscott, thanks for the info but I had already bitten the bullet and bought the 36v 10amp on advice from d8veh I will just have to wait now to see whether or not I need a new controller and also how to wire in a new connection to measure the battery? any advice would be helpful. Thanks everybody for their help and advice. aggie
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Deleted member 4366
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You won't need a new controller. You'll only need the right connector and maybe some wire, but it does give you the chance to upgrade your controller. The postage won't be any dearer, which makes a controller cheap.
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Deleted member 4366
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Does your motor have hall sensors (3 thick wires and 5 thin ones) or not (3 thick wires)?
If it does, the S12S would work. I can't remember if it works sensorless too.
The S09P would be the one if it doesn't work sensorless and you have a sensorless motor.
If you get either of them, you'll need to order the LCD and the speed sensor. It would also be advisable to fit a torque arm.
The KU93 is a cheaper option, but you only get one level of PAS (maximum), so it's a bit crappy if you use PAS. Be aware that if you increase the current, your battery will go down faster.
If it does, the S12S would work. I can't remember if it works sensorless too.
The S09P would be the one if it doesn't work sensorless and you have a sensorless motor.
If you get either of them, you'll need to order the LCD and the speed sensor. It would also be advisable to fit a torque arm.
The KU93 is a cheaper option, but you only get one level of PAS (maximum), so it's a bit crappy if you use PAS. Be aware that if you increase the current, your battery will go down faster.
Thanks everybody for your good advice especially d8veh. I received my high c rate 36v 10amp battery, charger, and rack for my Alien Auroa. total £256.85. The battery did not fit my original carrier (battery to fat) but the controller was compatable.. Once I had wired the battery to the controller all lights came on and I managed my usual 12 miles with all lights still on. I noted the battery voltage to start was 41.7 which dropped to 39,8 at the end of my journey. So, a good result all round and the fault was the battery as you suggested. Alien have since gone bust so I was lucky. Also, the battery charger is better, quicker and fitted with a fan. Thanks again aggie