hi i have mini electric quad for my kids took out lead acid replaced with 36v xiaomi batt worked ok on little forward backwards took out side got less than 100 yrds cut out no power on it and the blue light that flashes on the battery is flashing red the quad has 30 amp fuse strait after my scooter battery when power went disconnected the battery re plugged back in and power came back on blue light on also has bms on battery the lead acid batt was also 36v do i need bigger fuse
mini electric quad problem
- Thread starter bozy74
- Start date
Chalo
100 TW
See if you can get an amp rating for the speed controller in your quad, and compare it against the amp rating of the battery. If you're trying to pull too much juice from the pack you have, voltage will sag greatly and the BMS may intervene and cut off the power output.
Don't change to a higher value fuse without figuring out the real problem you have (which is almost certainly not the fuse).
Don't change to a higher value fuse without figuring out the real problem you have (which is almost certainly not the fuse).
Chalo
100 TW
The speed controller will only take as much current as it takes. Add resistance, and it will max out for more of the time, but full power is the same either way.
Is your xaiomi battery like these?
If so, it's only meant for maybe 15-20A at most (probably only for short bursts), some say only about 250W (which would only be about 7A). Above that the BMS is likely to shut the output off to protect itself, which it might indicate by a flashing light.
What does the controller label say on it for current limit, or a number with A on it, like 30A, etc. ? If you're not sure, post a picture of the controller label and we might be able to tell. Or if the vehicle itself came prebuilt, a link to the seller or manufacturer page for it, or at least a complete name and model number for it might let us look it up.
You shouldn't change the fuse to a different rating. It's there to protect things and is rated what it is for a reason.
The amps on the fuse doesn't have anything to do with the volts of the battery, if that is what you are asking.
BTW, if the original lead acid in there was only 24v, but you replace with a higher voltage battery, it may be harder on the controller (many can handle that voltage, but some might not) and may overheat the motor with the higher power level that can give if it's under high load a long time.
If so, it's only meant for maybe 15-20A at most (probably only for short bursts), some say only about 250W (which would only be about 7A). Above that the BMS is likely to shut the output off to protect itself, which it might indicate by a flashing light.
What does the controller label say on it for current limit, or a number with A on it, like 30A, etc. ? If you're not sure, post a picture of the controller label and we might be able to tell. Or if the vehicle itself came prebuilt, a link to the seller or manufacturer page for it, or at least a complete name and model number for it might let us look it up.
You shouldn't change the fuse to a different rating. It's there to protect things and is rated what it is for a reason.
The amps on the fuse doesn't have anything to do with the volts of the battery, if that is what you are asking.
BTW, if the original lead acid in there was only 24v, but you replace with a higher voltage battery, it may be harder on the controller (many can handle that voltage, but some might not) and may overheat the motor with the higher power level that can give if it's under high load a long time.
Chalo
100 TW
If that's what's printed on the motor, it's the motor's rating, but not necessarily close to what the speed controller is drawing. But it pretty much assures that your system is demanding more current than the battery can supply by itself. You'll need a more potent battery or multiples of the same battery in parallel.
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