RMZ 450 electric conversion

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chrisflysit   10 mW

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Re: RMZ 450 electric conversion

Post by chrisflysit » Apr 17 2021 9:25pm

That is like saying "I can't believe you broke your arm while wearing a helmet."

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Elektrosherpa   1 kW

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Re: RMZ 450 electric conversion

Post by Elektrosherpa » Apr 18 2021 5:01am

Oh f***.......
What a desaster.
Sorry to hear that.

Was the bike connected to some external source (e.g. for charging) when it started to burn,
or did it do that "on it's own"?
My Build (Bultaco Sherpa T350 -> QS138H70) :
viewtopic.php?f=12&t=110352

rivvs   1 W

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Re: RMZ 450 electric conversion

Post by rivvs » Apr 18 2021 6:56am

Elektrosherpa wrote:
Apr 18 2021 5:01am
Oh f***.......
What a desaster.
Sorry to hear that.

Was the bike connected to some external source (e.g. for charging) when it started to burn,
or did it do that "on it's own"?
It had been charged 1h30 prior to the fire and was disconnected from the charger.

j bjork   1 MW

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Re: RMZ 450 electric conversion

Post by j bjork » Apr 18 2021 10:14am

Oh, that is horrible :(

I hope the insurance pays for the garage at least.

It looks like there was no extra protection between the copper sheets and the battery cells?

rivvs   1 W

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Re: RMZ 450 electric conversion

Post by rivvs » Apr 20 2021 6:49pm

j bjork wrote:
Apr 18 2021 10:14am
Oh, that is horrible :(

I hope the insurance pays for the garage at least.

It looks like there was no extra protection between the copper sheets and the battery cells?
Theres was the plastic spacer and epoxy

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Ianhill   100 MW

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Re: RMZ 450 electric conversion

Post by Ianhill » Apr 20 2021 7:05pm

Looks like alot of copper overhang in corner areas id be keen to see more on how that pack was mounted in its alloy enclosure.
Infinite hrspwrs.

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onemorejoltwarden   100 W

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Re: RMZ 450 electric conversion

Post by onemorejoltwarden » May 19 2021 3:32am

Sorry
But the insurance question is relevant.
Are they covering it?
I had bad enough issues with mt trailer (26ft silver streak) needing separate coverage
not to mention liability, though a separate issue
"One more jolt, Warden, he's still twitching."

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Cystalyte GT MTB, Cannondale Quick with BBHSD
A car hits a man on an ebike every 10 minutes. We must find him, and get him off the street.

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Ianhill   100 MW

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Re: RMZ 450 electric conversion

Post by Ianhill » May 20 2021 10:02am

Insurance can pull the plug whenever they like in reality here in uk.

Anything thats not ce approved burns your gouse down on your own head it be, meddling with appliances thats not allowed either and nstional power reserve the right to terminate the supply of anyone found doing so.

Say for example your own solar installation takes you off grid you still have to comply to 18th edition wiring standards on all new installations and need signing off and inspection prior through out the build or the guy that signed it off takes the court case for not complying with good practices he then will habe to exolain why it was not practical to follow the rule book of the judge says your lazy you dangerous etc manslaughter is a possibility.

As for appliances that you make if they are kept in a shed away from the home theres a whole different claim route and only a maximum allowance set with the insurance is to be paid unless you have made an agreement like mentioned boat or trailer etc and theres small print in them too.
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rivvs   1 W

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Re: RMZ 450 electric conversion

Post by rivvs » Oct 29 2021 6:07pm

mathygreen wrote:
Oct 28 2021 3:52pm
Hi from US. thats a really nice bike with decent performance.

I'm trying to build a bike also with the qs 138 90h so i wonder were did you get that small sprocket for the motor?

Mine come with 14 tooth only and cant find anywere to buy a smaler like 11 or even 12 tooth.
I made it on the lathe.

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Elektrosherpa   1 kW

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Re: RMZ 450 electric conversion

Post by Elektrosherpa » Oct 30 2021 4:44am

mathygreen wrote:
Oct 28 2021 3:52pm
Hi from US. thats a really nice bike with decent performance.

I'm trying to build a bike also with the qs 138 90h so i wonder were did you get that small sprocket for the motor?

Mine come with 14 tooth only and cant find anywere to buy a smaler like 11 or even 12 tooth.
What are the dimensions of the shaft?
My Build (Bultaco Sherpa T350 -> QS138H70) :
viewtopic.php?f=12&t=110352

larsb   100 MW

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Location: Gothenburg, Sweden

Re: RMZ 450 electric conversion

Post by larsb » Apr 29 2022 11:55am

Sad to see that. Hope it gets rebuilt in a better way!

Did you ever try this motor with the full 800A phase current?

I am curious since i haven’t seen a single build where anyone burnt one of these motor from overcurrent

matt912836   100 W

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Location: New York

Re: RMZ 450 electric conversion

Post by matt912836 » Apr 29 2022 12:44pm

ASI's have been known to spontaneously combust without warning on occasion, especially after going for a seemly innocent and successful first ride, main reason im scared to touch one really

rivvs   1 W

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Re: RMZ 450 electric conversion

Post by rivvs » Apr 29 2022 7:18pm

matt912836 wrote:
Apr 29 2022 12:44pm
ASI's have been known to spontaneously combust without warning on occasion, especially after going for a seemly innocent and successful first ride, main reason im scared to touch one really
In my case the controller was not the problem. It still work even if it is a little bit melt.

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liveforphysics   100 GW

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Re: RMZ 450 electric conversion

Post by liveforphysics » Jun 01 2022 2:36pm

Sorry for your loss my friend!
Such a beautiful machine you made that seemed to perform great!

Blessings it got the garage without taking the house too.

Corrosion effects, and/or thermal expansion-contraction related chaffing or dielectric creeping can induce latent thermal runaway in packs. Dirtbike packs are as challenging as batteries get to keep alive with respect to vibration/chaffing/corrosion.
Each carcinogen vapor exposure includes a dice roll for cancer.

Each mutagen vapor exposure includes a dice roll for reproductive genetic defects in your children.

Each engine start sprays them into a shared atmosphere which includes beings not offered an opportunity to consent accepting these cancer experiences and defective genetics life experiences.

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Elektrosherpa   1 kW

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Re: RMZ 450 electric conversion

Post by Elektrosherpa » Jun 01 2022 3:49pm

ervinjason wrote:
Jun 01 2022 1:35pm
Im trying to build a bike also with the qs 138 90h so i wonder were did you get that small sprocket for the motor?

Mine come with 14 tooth only and cant find anywere to buy a smaler like 11 or even 12 tooth.
If you read the whole build thread (which is really not long), you will find the answer...
My Build (Bultaco Sherpa T350 -> QS138H70) :
viewtopic.php?f=12&t=110352

Vincentp   1 µW

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Re: RMZ 450 electric conversion

Post by Vincentp » Nov 24 2022 11:51am

Wow what a beautiful build, hopefully it doesn’t discourage you from building again. Any ideas on the exact mode of failure yet? Seems so bizarre to go up just sitting there, only thing I could think is one of the fuses came undone or something shorted out a group together and started the chain reaction. Not sure how all cables were routed etc, could have been bad electrical connection causing excess heat somewhere…causes melt of heat shrink etc. and made bare metal contact? Hope all is well and that insurance helped out a bit:/.

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