Power keeps cutting out?

[Brad12]

My friend has a scooter thats having some problems, the power seems to be cutting out when he gases the throttle.. maybe a loose wire? and the back breaks jammed?

 

[www.recumbents.com]

Many electric bikes have things called a battery management system "BMS" that will cut off the battery if it is too low or has too high a current draw. Gassing the throttle could cause a high current situation.

 

[deardancer3]

If it is a little platform scooter, many times they have SLA batteries.

When they get old, their voltage sags, especially under increased load, then the "low voltage cutout" LVC trips.


Ask the owner what type cells they have, and how old they are.
If SLA and over 18 months, good bet new batteries are needed.

 

[dogman dan]

Yes, I vote for the battery is shot. Sags so bad the controller hits the low voltage cutoff and shuts itself down.

But it could be wiring, such as a really bad connection to the battery, so look at all those.

 

[Brad12]

its an ebike scooter, not a bicycle or like alittle canadian tire thing. So just take a look at all the wires? if not what else could it be?

 

[d8veh]

I'm with Dogman. The batteries wear down with time, so, unless it's fairly new, it could be that the battery needs replacing. However, you can get the same symptoms when the battery contacts don't make a good connection - especially if it's the type where the battery slides or drops onto a couple of pins. The little spring-loaded female contacts can get bent or corroded, both of which cause a bad contact. If they get bent, you have to bend them back, which requires a bit of dismantling to remove them because they're not easy to bend back from the outside of the battery. if they're corroded, that's a bit easier to deal with- just clean them.

 

[Brad12]

so its eaither the battery needs replacing or connectors from the battery to the controller or in the battery?

 

[Ykick]

You need to be able to see the pre-BMS battery voltage under load.

 

[Brad12]

And how would i be able to do that ?

 

[Ykick]

And how would i be able to do that ?

'can't see a pic of what you're dealing with but it's fairly basic troubleshooting to place test meter leads on the battery power connections and figure out a way to apply power. If voltage drops 5-10 volts or more, batteries are likely toast or perhaps they're not being fully charged?

There again, no photos, no real info, not much more than blind guesswork here? 'good luck...

 

[elbotas2700]

Okay how about my scooter i put a 1000 watt controller have a brand new 6 in parallel 54 volt battery & no bms when I hit the throttle at a certain point if i go to fast it cuts out &starts making this vibrating sound from the motor or noise .