Ebike not powering up help !!!!

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markell6146   10 µW

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Ebike not powering up help !!!!

Post by markell6146 » Feb 12 2018 7:28am

Ok Im a newbie to ebikes and purchased a diy 48v 1000w rear tier kit to upgrade my bike. I put the kit together and purchased 2 lipo batteries specs are 8000 mah 6s 22.2v , after charging the batteries i connected it to the Dc moto controller by lithium battery specs voltage: dc 48v current: 26v. I think I have the wrong battery (?????) Because everytime i try to connect the battery i get a spark but no power . Can anyone set me straight. Please provide info as simply as possible because I have no idea what any tech talk means. :oops:

markell6146   10 µW

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Re: Ebike not powering up help !!!!

Post by markell6146 » Feb 12 2018 7:47am

Question will this battery work its the cheapest i could find, please let me know it someone can provide a cheaper one.

Specs: 48v 10ah lithium ion battery 48v 10ah li-ion battery pack with 54.6V charger+BMS

docw009   100 kW

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Re: Ebike not powering up help !!!!

Post by docw009 » Feb 12 2018 9:38am

markell6146 wrote:
Feb 12 2018 7:47am
Question will this battery work its the cheapest i could find, please let me know it someone can provide a cheaper one.

Specs: 48v 10ah lithium ion battery 48v 10ah li-ion battery pack with 54.6V charger+BMS
First things first. Did the motor ever run on your first set of batteries? If it never did, then you need to understand the cause, else just buying another battery may not get it running.

Did you hook those two batteries in parallel or serial?

markell6146   10 µW

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Re: Ebike not powering up help !!!!

Post by markell6146 » Feb 12 2018 10:01am

These are my (first set of batteries.) And they havent worked . The diy rear engine kit is new , hooked it up straight out the box.

I purchased the two batterys from ebay
Multistar High Capacity 16000mAh 6S 10C Multi-Rotor Lipo Pack XT90 - 2 batteries 8000 each.

I hooked up one at a time. They gave off a spark but no power, lights didnt lite up at all. Nor does the wheel move.
Last edited by markell6146 on Feb 12 2018 1:40pm, edited 5 times in total.

mark5   100 kW

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Re: Ebike not powering up help !!!!

Post by mark5 » Feb 12 2018 10:04am

Parallel is battery 1 black - wire connected to battery 2 black - wire. Battery 1 red + wire connected to red + wire of battery 2. Parallel doubles capacity but not voltage.

Series is battery 1 - wire connected to battery 2 + wire. Battery 1 + wire goes to controller's + wire. Battery 2 - wire goes to controller's - wire. Series doubles voltage but not capacity.

Measure the voltage of batteries, the way you have them both connected together now, and tell us what it is.

markell6146   10 µW

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Re: Ebike not powering up help !!!!

Post by markell6146 » Feb 12 2018 10:10am

I only used one battery at a time they are not connected. I connected one 8000mah battery to the controller box and got a spark . But no power lights or any indication that there was power going to to the motor . I checked the battery with my cen tech meter and the voltage was 47-48. I think

mark5   100 kW

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Re: Ebike not powering up help !!!!

Post by mark5 » Feb 12 2018 10:15am

You can't get 47-48V from just one 6S battery. 6S * 4.2V = 25.2V. You need to connect them together in series in order to get your motor to work.

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Racer_X   1 kW

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Re: Ebike not powering up help !!!!

Post by Racer_X » Feb 12 2018 12:33pm

markell6146 wrote:
Feb 12 2018 10:10am
I only used one battery at a time they are not connected. I connected one 8000mah battery to the controller box and got a spark . But no power lights or any indication that there was power going to to the motor . I checked the battery with my cen tech meter and the voltage was 47-48. I think
You need to read up on lipo basics. Obviously your making errors on how to work with LiPo's.
For one you need to connect the batteries in series to make 48v. With a dongle like this.
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Cannondale F8 MTB, 9c 9x7, Regen,ThreeSpeed Cruise. with torque plates. 12s3p or 18s2p depending on mood.Maxxis Holy Roller in the summer and Schwalbe Ice Spiker in winter.
Backup bike Schwinn Heavy Duti Beach Cruiser, 9c 9x7 front Regen,ThreeSpeed Cruise. with clamping dropouts, Maxxis Holy Roller in the summer and Schwalbe Ice Spiker in winter.

markell6146   10 µW

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Re: Ebike not powering up help !!!!

Post by markell6146 » Feb 12 2018 1:55pm

Whats the name of this splitter ??

Jon NCal   1 kW

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Re: Ebike not powering up help !!!!

Post by Jon NCal » Feb 12 2018 2:12pm

markell6146 wrote:
Feb 12 2018 1:55pm
Whats the name of this splitter ??
https://hobbyking.com/en_us/xt90-batter ... eries.html

markell6146   10 µW

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Re: Ebike not powering up help !!!!

Post by markell6146 » Feb 12 2018 4:24pm

I think this is the one i need . XT90 Battery Harness 10AWG for 2 Packs in Parallel

Jon NCal   1 kW

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Re: Ebike not powering up help !!!!

Post by Jon NCal » Feb 12 2018 4:29pm

markell6146 wrote:
Feb 12 2018 4:24pm
I think this is the one i need . XT90 Battery Harness 10AWG for 2 Packs in Parallel
No, parallel is not what you need. Parallel gives 22.2v. Series will give you 44.4v.

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Chalo   100 GW

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Re: Ebike not powering up help !!!!

Post by Chalo » Feb 12 2018 7:08pm

markell6146 wrote:
Feb 12 2018 4:24pm
I think this is the one i need . XT90 Battery Harness 10AWG for 2 Packs in Parallel
No. Consider getting some experienced technical help for your project.
This is to express my gratitude to Justin of Grin Technologies for his extraordinary measures to save this forum for the benefit of all.

docw009   100 kW

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Re: Ebike not powering up help !!!!

Post by docw009 » Feb 12 2018 7:26pm

Markell, sounds like you don't know much about batteries. Lipos are big fire hazards if you don't know anything about them.

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Re: Ebike not powering up help !!!!

Post by amberwolf » Feb 13 2018 2:19am

markell6146 wrote:
Feb 12 2018 7:28am
and purchased 2 lipo batteries specs are 8000 mah 6s 22.2v , after charging the batteries iv.
Exactly how did you charge each battery, and exactly what voltage did you charge each one up to?

JanComputerman   10 W

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Re: Ebike not powering up help !!!!

Post by JanComputerman » Mar 25 2018 11:34pm

First before you plug in the battery make sure you have the throttle power button turned off ...the red button should be OUT not IN or if you have a key switch make sure it is off.
One battery or two in parallel (red to red black to black) will not have enough voltage to run the motor or light up the lights on the throttle.
The spark you get is the controller capacitors charging up and is caused by you plugging in a directly connected battery pack instead of an eBike pack that has a soft power up circuit. It's not a good thing to do and can blow fuses and damage the controller capacitors so consider getting the HobbyKing XT90s anti-spark connectors for the 2 into 1 splitter so you plug the controller into the female XT90s green marked connector. I soldered them together in a male to female set and plugged the male end into the splitter and use the female (green marked) connector for the final plug-in for the controller. That's the one with the built in resistor that stops the sparking so plug that one in last. With any luck you should be good to go.

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