BBSHD controller melt down. ##### Update#####

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MarkGale   10 µW

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BBSHD controller melt down. ##### Update#####

Post by MarkGale » May 26 2019 5:21pm

I ran this new ebike build for approx. 3 hours, nothing heavy mostly flat pavement, it shut off a few times for no reason I had to stop the bike and power it back up, at times pedal assist would not engage sometimes until I hit the throttle.
When I was adjusting the rear derailleur with walk assist with the bike on a stand it would go into walk assist and then full speed and walk assist again and then it just died with a distinct burned plastic smell.

I'm trying to figure out what could have caused this, battery was charged to 80% when started

Luna Bafang BBSHD
Luna wolf pack v2 52V
500C DISPLAY
Last edited by MarkGale on Jun 06 2019 10:55pm, edited 1 time in total.

MarkGale   10 µW

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Re: BBSHD controller melt down

Post by MarkGale » May 26 2019 5:25pm

photos
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neptronix   100 GW

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Re: BBSHD controller melt down

Post by neptronix » May 26 2019 6:01pm

That was quick!
What's the response from the vendor?
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500 MTB.
Monster MTB: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: Cannondale semi recumbent - under construction.
Blue Dream: Maxaraya FS semi recumbent and high efficiency mid-drive - under construction.

dustNbone   10 kW

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Re: BBSHD controller melt down

Post by dustNbone » May 27 2019 12:26am

I notice the bike is standing still in top gear.

Probable cause of death.

MarkGale   10 µW

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Re: BBSHD controller melt down

Post by MarkGale » May 27 2019 9:09am

Hi, dustNbone thanks for tuning in, I took the bike photo during the build before ever going on a first ride, really wish the answer was that easy, I'm working with Luna on getting a replacement and really don't want another meltdown.

,
,

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tomjasz   10 GW

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Re: BBSHD controller melt down

Post by tomjasz » May 27 2019 12:11pm

Charged to 80% but what was the actual output? Tested by multimeter, not onboard indicators?
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

MarkGale   10 µW

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Re: BBSHD controller melt down

Post by MarkGale » May 27 2019 12:59pm

Did not have a multi meter connected while riding under load just the readout on the display.

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tomjasz   10 GW

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Re: BBSHD controller melt down

Post by tomjasz » May 27 2019 1:21pm

MarkGale wrote:
May 27 2019 12:59pm
Did not have a multi meter connected while riding under load just the readout on the display.
Just a curiosity really. Not likely a battery issue but if it were mine I'd use my multimeter and get a static voltage.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

MarkGale   10 µW

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Re: BBSHD controller melt down

Post by MarkGale » May 27 2019 1:35pm

Hi, sorry did not get your first question, the battery is fine I checked it with my Luna smart charger, motor seems fine too, really everything except the controller, had issues with it from the beginning.
The batteries and this whole setup is awesome, Luna is also being very supportive

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tomjasz   10 GW

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Re: BBSHD controller melt down

Post by tomjasz » May 27 2019 4:39pm

Sorry I’m suspicious. But if you’re happy with the support you’re getting, all good. Me? I’d be checking battery output regardless of the Luna charger.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

MarkGale   10 µW

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Re: BBSHD controller melt down. ##### Update#####

Post by MarkGale » Jun 06 2019 11:07pm

Luna sent out a free replacement controller they did not even charge me for shipping , honestly they only seemed to want to get my bike going again, thank you so much Luna.
I got it all back together took it out for a spin , so far ,so good, no weird behavior like the original, going out this weekend for a few hours will post more
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markz   100 GW

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Re: BBSHD controller melt down. ##### Update#####

Post by markz » Jun 06 2019 11:14pm

What they send you, just the pcb board/controller or new motor?

Volt_Ampere   10 W

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Re: BBSHD controller melt down. ##### Update#####

Post by Volt_Ampere » Jun 07 2019 2:15pm

Glad they did that! It was most likely defective to begin with.

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fechter   100 GW

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Re: BBSHD controller melt down. ##### Update#####

Post by fechter » Jun 07 2019 3:04pm

I've never seen one burn up like that! My guess would be a bad solder connection on one of the phase wires got loose and started arcing. Nice it was covered by Luna.
"One test is worth a thousand opinions"

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