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DIY ebikes fire during storage
When your 72v battery isn't charging so you decide to store it without even disconnecting it
yikes
Where's that from @Akbar
facebook DIY ebikes page
yikes
I wonder where the batteries were fro...
from*
He didn't disconnect non charging battery from bike when he stored it
Alongside 2 other ebikes
What's the story
he said he has built lots of batteries lol
yeah
this is why it's a good idea to be personally liable for it
Did he ring the fire brigade?
before taking the pic?
Basically his 72v battery wasn't charging.
So he store the bike in shed with 2 other ebikes without disconnecting battery
wow nice
so it just went up
For all we know could have been other 2
🤷‍♀️
Battery was 72v 20ah Sony 25a cells and 100a sabvoton
Put reflective tape and spoke covers on the wheel,led strips pointing inwards on the inside of the forks and stays
At least it was stored outside
This is why I don't regret my heavy LiFePo4 packs
@Akbar someone pointed out looks like he had solar panels aswell
lol yes
maybe something happened with that
I mean he had 3 ebikes in that shed and a solar panel
some form of charging was going on
Prob a home rew charger that failed to stop
What kind of lifepo4 battery do you have?
Or did you build your own
And yeah, a lifepo4 wouldn't really cause a fire like that.
Guys I need help lol
The bolt for the derailleur hanger has come loose and i can’t see a thread
Oh I need a nut
I checked an identical bike and it has a special nut which goes there
Lmao how did you manage that
I suspect I lost the nut many months ago
And my derailleur hanger was being held on by the axle nut
The only reason the bolt is still there was because the torque arm stopped it falling out
@Akbar that looks like a gubbin that your local bike shop prob has an entire bin of used ones
Too late lol I bought one
£3 for bolt and nut, £5 for bolt, nut and hanger
So went and bought the bolt nut and hanger
my bbshd doesnt turn on anymore after 1 month usage of Luna’s ludacris controller
oof
i put the stock controller back on and it still doesnt turn on
mine chewed up its gears/shaft
does it make any noise
or just refuses to turn on?
yea it refuses to turn on with either controller, no weird noise it wasn’t even hot when it died
ive checked the cables like 10x, no odd smells, no weird noises
i think the motor core is blown
Fried sensors
id say ud have to open it to check
Or core
anything odd? looks fine to me
blown sensors might not be noticable. ud need a multimeter. same with the core
what part should i test for with my multimeter?
the hall sensors, and the phase leads, see if theres is a short or a high resistance
im not 100% sure
im a MURIKAN, when my bbshd died i just got a cyclone XD
lol thanks
^^
First, while its plugged into controller, or manually proving 5v to hall sensors
check the voltage on each hall sensor, one pin of them should toggle low/high as you manually rotate the motor
if it doesn't then you need new hall sensors
prob not the center pin, since those are all connected
Generally, hall sensors are the first to fry, thermally. followed by magnets and coils
In that order? magnets fry before coils?
Always
Magnets have a lower critical temp to lose their power than the coils do before they burn tru their wire enamel and short. Of course a massive spike in heat in the coils (such as a hard stall) could possibly cook the coil before the heat has time to sink into the magnets
I thought the coil insulation melted first, thanks for telling me this
Depends on quality. Really cheap wire prob would melt first. But decent quality ones the enamel failure temp would be hire than the denaturing(don't think that's the right term) temp of magnets. Doesn't take alot of heat to cook a magnet
^^ the magnets lose strength first, but you'll prob short a coil before you completely ruin the magnets
so you'll find your motor loses power, maybe has a higher top RPM when unloaded
(but much less torque)
ANY CLUES where this lil magnet goes in my bafang hub motor
I noticed it was on the motor in that pic where the paste is next to the axle and gear
the magnet is in my hand
uhhhhhhhhhh
lmao
oh boyu
i hope thats not a magnet from the housing
or maybe it goes in the lil slot on this side in the middle?
cause it has a curve
oh wait
ya it might be the key
for that keyway to attach to the shaft
maybe?
I just swapped the motor out on an old sondors and the wheel wasn't turning so i took it out and opened it to look at it.
see if it fits
it Def fits in there
just kinda annoying to get back in
yea
thats what ties the motor shaft to the planetary