void-32/EV-conversation · Datasets at Hugging Face

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If that's not a robust and safe setup, I don't know what is. :P
i am curious if there are any objections to this or cause for it to blow up
i don't want any more fires. üò¢
@desade22 Yeah, I remember hearing that EM3ev had plans to re-introduce a 14s9p triangle, but built like their current smaller hardcase triangle.
But the most recent murmurs I heard about that were pre-COVID, so idk.
They told me it wasn‚Äôt happening because it would be too big for a lot of frames.
People think I am advertising for em3ev
Ah, ouch
oof :P
i am not
i appreciate that they have not set me on fire.
i opened their battery and put it back together and still use it
I've been accused of that before, though not as aggressively as the attention you're getting. :/
Seriously, I just really like EM3ev because they make good, reliable shit. Same with Grin, who I'll also talk your ear off about.
i got hit by an SUV and my em3ev didn't go on fire.
oh hey it's Louis Rossmann
This is the text from EM3EV
‚ÄúUnfortunately, we have stopped offering the 14s9p batteries. We are moving away from heat-shrink batteries and want to only offer hard-case batteries. Hardcase batteries are rain and weather proof. The heat-shrink batteries are simply not and they can get water damaged if exposed to the elements without protection. At some point in the future next year we hope to offer a 14s6p battery with the larger format cells in a hard-case. It would be roughly the same dimensions as the 14s9p heat-shrink battery. We don‚Äôt have a time-line as of yet for when this new battery will be ready though.‚Äù
Oooh. 14s6p of large-format cells.
It's totally possible I've misread that exact text before. >_<
I'm guessing that'll be 21700s if/when that happens.
MOst likely
If they do high-capacity cells like the 50E, that'd be 30Ah.
Not quite as energy dense as the old configuration with 35E's, but not far off, and honestly, if I had to choose between +1.5Ah vs. a sturdier build, I'd likely pick the latter.
EM3ev's selection of 20s packs has been weirdly limited for as long as I've been watching them. No idea why.
And yeah, I fully support the move to hardcase packs. Not only are they more robust, but if EM3ev's rectangles are anything to go by, they're also a lot more easily serviceable, since the waterproofing isn't achieved via layers upon layers of tape and foam and shrinkwrap.
I just don't like that the discontinued their 14s9p triangle so early that there's been a gaping triangle-sized hole in their product lineup for the last year.
Yea, even with all the stuff they put on the heatshrink packs, you still can't really trust that for impact/water proofing
they wanna move to hardcase only, awesome, but GET THE MOLDS DONE ALREADY DAMNIT lol
Yes exactly. lol
@larossmann electronics discord suggests you should use traditional fuses as well as the circuit breakers for the best protection
^ fuses are technically safer yes
TBF, the breaker is more a master on/off switch with bonus safety features
No expert on BMS but do these things not try to sense the output load? Would that still work through the bridge rectifier?
BMS do detect load on the battery, and it would still work through anything connected because current can't get around the BMS
I have a BMS which only outputs a couple of volts until you connect it to a load
I'll note that most e-bikes don't have fuses or breakers, so I feel they are optional but very nice to have.
I run a breaker myself, and then fuses for the keyswitch/12v converter
I run a maxi blade fuse
60v rated though, you can find them
Ah, those are the big bois I see in my trucks panel
Never looked into those for e-bikes.
I'll note the first I found where 32v, so it seems the 60v rating is not universal at least.
32v is the standard for 12v car batteries
Yea
I think anyway
but they look big enough they might come in other voltages
ATO/Mini fuses seem to never come in higher then 32V~
Id wager 32v is just so they work at 12v/24v (and 24v at high charge voltages)
24v at full cycle charge is like 28.8v so
probably
another reason for the 32v rating is isolation/insulation properties.
Can you see the smoke?
üîã :battery_fire: ‚ö° üî•
@Black Moons
Watch video first before clicking spoiler
\|\|It‚Äôs not smoke from the battery lol, I just had a damp cloth that was soaked in hot water and it‚Äôs just the steam coming off from it\|\|
LOL
Get your cloth from EM3ev next time
:/
I was concerned there
yes, luckily it ended without incident
@Black Moons
Hello Louis,
We have get information from your enginner about the explosion:
1.Your circuit diagram is no problem,you use a current regulator to avoid two battery in parallel use.The battery is 72v 35ah by Samsung 35E cell with 60A BMS,and your motor current is about 55A,but you use a 30A regulator,that is the problem,because current will be more than 55A,so your regulator will broken because of so high current.
2.After your regulator broken the battery can still work,but that mean two batteries use in parallel,and if the two battery voltage is not same,the higher voltage battery will recharge the lower voltage battery,and the BMS is charge and discharge at same port,so this recharge current can be very large,maybe more than 40A.But the battery cell Max.recharge current can not be more than 17.5A,so this large recharge current will damage the battery cell,make the battery cell cause short circuit and that may make the fire happen.
The explosion is related to your improper use, I hope you can understand this.
Rechie
30 amp regulator.
where did they get that i used a 30 amp regulator?
I think it's when you said the ebike couldn't have been pulling more than 30A max
they probably read that as your bridge rectifier being rated at 30A due to translation error
@larossmann Email them back saying that the bridge rectifier was rated for 100A but the load never exceeded 30A
^^
it is what it is
i am excited to get my new setup, and em3ev batteries
I'm excited to see it :P
The thing that bugs me is that UPP apparently already spread the "30A rectifier" narrative on social media.
Folks here were already talking about it yesterday because a UPP rep posted that narrative on Facebook.
yeah that's pretty tough
But yes, I'm also really interested in seeing your new setup come together. :)
@NCC1941 I'm also excited to see yours come together
also if my ODK build goes well
üëÄ
you should get one too
we could be ODK buddies
I'm definitely looking forward to seeing what you do with that ODK.
I'm super not in the market for a new build right now though. lol
As for the ECR, it's together. I'll keep posting about various tweaks and improvements and fixes that are on the agenda, but in broad strokes, it's pretty much where I want it. The big crazy stuff is done, and it's just a big crazy bike now. :)
Haha
It is an awesome bike
So you're not the "car enthusiast' type of owner
where you're looking for experiences on new vehicles
Oh, I am, but I'm fine with my circumstances reigning me in on that. lol
If I had unlimited resources, I'd have one ebike for each thing, rather than 'The Kitchen Sink'.
Haha
I think in terms of branching out for bikes, you really only need.... 3 at most
you need a kitchen sink/practical bike
a fast sporty bike that's fun

If that's not a robust and safe setup, I don't know what is. :P

i am curious if there are any objections to this or cause for it to blow up

i don't want any more fires. üò¢

@desade22 Yeah, I remember hearing that EM3ev had plans to re-introduce a 14s9p triangle, but built like their current smaller hardcase triangle.

But the most recent murmurs I heard about that were pre-COVID, so idk.

They told me it wasn‚Äôt happening because it would be too big for a lot of frames.

People think I am advertising for em3ev

Ah, ouch

oof :P

i am not

i appreciate that they have not set me on fire.

i opened their battery and put it back together and still use it

I've been accused of that before, though not as aggressively as the attention you're getting. :/

Seriously, I just really like EM3ev because they make good, reliable shit. Same with Grin, who I'll also talk your ear off about.

i got hit by an SUV and my em3ev didn't go on fire.

oh hey it's Louis Rossmann

This is the text from EM3EV

‚ÄúUnfortunately, we have stopped offering the 14s9p batteries. We are moving away from heat-shrink batteries and want to only offer hard-case batteries. Hardcase batteries are rain and weather proof. The heat-shrink batteries are simply not and they can get water damaged if exposed to the elements without protection. At some point in the future next year we hope to offer a 14s6p battery with the larger format cells in a hard-case. It would be roughly the same dimensions as the 14s9p heat-shrink battery. We don‚Äôt have a time-line as of yet for when this new battery will be ready though.‚Äù

Oooh. 14s6p of large-format cells.

It's totally possible I've misread that exact text before. >_<

I'm guessing that'll be 21700s if/when that happens.

MOst likely

If they do high-capacity cells like the 50E, that'd be 30Ah.

Not quite as energy dense as the old configuration with 35E's, but not far off, and honestly, if I had to choose between +1.5Ah vs. a sturdier build, I'd likely pick the latter.

EM3ev's selection of 20s packs has been weirdly limited for as long as I've been watching them. No idea why.

And yeah, I fully support the move to hardcase packs. Not only are they more robust, but if EM3ev's rectangles are anything to go by, they're also a lot more easily serviceable, since the waterproofing isn't achieved via layers upon layers of tape and foam and shrinkwrap.

I just don't like that the discontinued their 14s9p triangle so early that there's been a gaping triangle-sized hole in their product lineup for the last *year*.

Yea, even with all the stuff they put on the heatshrink packs, you still can't really trust that for impact/water proofing

they wanna move to hardcase only, awesome, but GET THE MOLDS DONE ALREADY DAMNIT lol

Yes exactly. lol

@larossmann electronics discord suggests you should use traditional fuses as well as the circuit breakers for the best protection

^ fuses are technically safer yes

TBF, the breaker is more a master on/off switch with bonus safety features

No expert on BMS but do these things not try to sense the output load? Would that still work through the bridge rectifier?

BMS do detect load on the battery, and it would still work through anything connected because current can't get around the BMS

I have a BMS which only outputs a couple of volts until you connect it to a load

I'll note that most e-bikes don't have fuses or breakers, so I feel they are optional but very nice to have.

I run a breaker myself, and then fuses for the keyswitch/12v converter

I run a maxi blade fuse

60v rated though, you can find them

Ah, those are the big bois I see in my trucks panel

Never looked into those for e-bikes.

I'll note the first I found where 32v, so it seems the 60v rating is not universal at least.

32v is the standard for 12v car batteries

Yea

I think anyway

but they look big enough they might come in other voltages

ATO/Mini fuses seem to never come in higher then 32V~

Id wager 32v is just so they work at 12v/24v (and 24v at high charge voltages)

24v at full cycle charge is like 28.8v so

probably

another reason for the 32v rating is isolation/insulation properties.

Can you see the smoke?

üîã :battery_fire: ‚ö° üî•

@Black Moons

Watch video first before clicking spoiler

||It‚Äôs not smoke from the battery lol, I just had a damp cloth that was soaked in hot water and it‚Äôs just the steam coming off from it||

LOL

Get your cloth from EM3ev next time

:/

I was concerned there

yes, luckily it ended without incident

@Black Moons

Hello Louis,

We have get information from your enginner about the explosion:

1.Your circuit diagram is no problem,you use a current regulator to avoid two battery in parallel use.The battery is 72v 35ah by Samsung 35E cell with 60A BMS,and your motor current is about 55A,but you use a 30A regulator,that is the problem,because current will be more than 55A,so your regulator will broken because of so high current.

2.After your regulator broken the battery can still work,but that mean two batteries use in parallel,and if the two battery voltage is not same,the higher voltage battery will recharge the lower voltage battery,and the BMS is charge and discharge at same port,so this recharge current can be very large,maybe more than 40A.But the battery cell Max.recharge current can not be more than 17.5A,so this large recharge current will damage the battery cell,make the battery cell cause short circuit and that may make the fire happen.

The explosion is related to your improper use, I hope you can understand this.

Rechie

30 amp regulator.

where did they get that i used a 30 amp regulator?

I think it's when you said the ebike couldn't have been pulling more than 30A max

they probably read that as your bridge rectifier being rated at 30A due to translation error

@larossmann Email them back saying that the bridge rectifier was rated for 100A but the load never exceeded 30A

^^

it is what it is

i am excited to get my new setup, and em3ev batteries

I'm excited to see it :P

The thing that bugs me is that UPP apparently already spread the "30A rectifier" narrative on social media.

Folks here were already talking about it yesterday because a UPP rep posted that narrative on Facebook.

yeah that's pretty tough

But yes, I'm also really interested in seeing your new setup come together. :)

@NCC1941 I'm also excited to see *yours* come together

also if my ODK build goes well

üëÄ

you should get one too

we could be ODK buddies

I'm definitely looking forward to seeing what you do with that ODK.

I'm super not in the market for a new build right now though. lol

As for the ECR, it's together. I'll keep posting about various tweaks and improvements and fixes that are on the agenda, but in broad strokes, it's pretty much where I want it. The big crazy stuff is done, and it's just a big crazy bike now. :)

Haha

It is an awesome bike

So you're not the "car enthusiast' type of owner

where you're looking for experiences on new vehicles

Oh, I am, but I'm fine with my circumstances reigning me in on that. lol

If I had unlimited resources, I'd have one ebike for each thing, rather than 'The Kitchen Sink'.

Haha

I think in terms of branching out for bikes, you really only need.... 3 at most

you need a kitchen sink/practical bike

a fast sporty bike that's fun