M820 Bafang - LIGHTCARBON LCE930 Frame (lightweight)

[JimLee-Lightcarbon]

but your question is 100% valid, a range extender port would be awesome!
but then we need a device inside the frame that will regulate the discharge of both batteries I guess

The current solution for the extended-range battery is to insert it directly into the charging port of the main battery in series.

 

[mike_kelly]

I think you mean in parallel. If you put the external battery in series it would double the voltage.

 

[KaroKönig]

@JimLee-Lightcarbon , Hi Jim, I hope you have good news regarding the delivery date of the L-frame ???
Many guys here already have all the components together and are eagerly waiting for the frame

 

[JimLee-Lightcarbon]

@JimLee-Lightcarbon , Hi Jim, I hope you have good news regarding the delivery date of the L-frame ???
Many guys here already have all the components together and are eagerly waiting for the frame

Loading time of size L in end of this month,
Because the M size has some small problems during the customer's use, we have made some small improvements, resulting in the L size sample has just completed the test, the first batch of bulk orders will be completed on the 25th, and then arranged for UD matt paint and packaging.
also welcome to Eurobike 2023 exhibition to observe our frame,
our booth Hall 9.1-G39

 

[brbr]

Loading time of size L in end of this month,
Because the M size has some small problems during the customer's use, we have made some small improvements, resulting in the L size sample has just completed the test, the first batch of bulk orders will be completed on the 25th, and then arranged for UD matt paint and packaging.
also welcome to Eurobike 2023 exhibition to observe our frame,
our booth Hall 9.1-G39

Any way to save time by not having the ud matt paint? Is it only cosmetic or is it protective also?

 

[JimLee-Lightcarbon]

Any way to save time by not having the ud matt paint? Is it only cosmetic or is it protective also?

the UD matt means a layer of paint with a color close to YS728 is painted on the surface, (used it to cover the joints of the carbon layers, and some others)., and the outermost layer is a layer of transparent paint for protection, sun protection and dust resistance.
Even if you don't need to do these, it won't reduce the time, because after these steps are completed, there are two final quality inspections. If one or two sets are taken out for inspection, they can only be carried out when the workers are free, and Now we have a lot of orders and the workers are very busy.

 

[Marauder]

Just finished my build last week, it’s about 20 kg..
View attachment 116984

That's a sweet looking build. Interested to hear your ride impressions. Wondering how the long chainstay would ride. Also would be good to see how many meters of climbing you can get in with one charge.


Cheers

 

[brbr]

I finally received the motor yesterday! it's crazy how small it is
Now waiting for the frame, and maybe the battery, one day...

 

[clix]

I would have also received it yesterday, if I would be home. It is now rescheduled for Monday. I feel, both our motors were in the same package from China to EU.
Did you also recieve all the cables and display? Which one did you choose?

 

[brbr]

I would have also received it yesterday, if I would be home. It is now rescheduled for Monday. I feel, both our motors were in the same package from China to EU.
Did you also recieve all the cables and display? Which one did you choose?

Yes! Everything was inside, cables and display, I did not have the time yet to review all the parts but it seems good!
I chose the 43v, but I should have gone for the 36v and the smaller bafang battery…

 

[Goff]

Loading time of size L in end of this month,
Because the M size has some small problems during the customer's use, we have made some small improvements, resulting in the L size sample has just completed the test, the first batch of bulk orders will be completed on the 25th, and then arranged for UD matt paint and packaging.
also welcome to Eurobike 2023 exhibition to observe our frame,
our booth Hall 9.1-G39

Hi Jim
Do you have any pictures or videos of the stand at Eurobike?

 

[JimLee-Lightcarbon]

Hi Jim
Do you have any pictures or videos of the stand at Eurobike?

 

[brbr]

Does anyone knows what is the peak power of the M820 in the highest mode ?
I cannot find it, I'm trying to source good 21700 cells and I want to be sure to have the right Amps rating!

 

[Bluicie]

Hi Jim
Do you have any pictures or videos of the stand at Eurobike?

The wall we are most interested in, from LightCarbons facebook page:

 

[brbr]

The wall we are most interested in, from LightCarbons facebook page:

View attachment 118926

Looks like a xc m820

 

[Bluicie]

Looks like a xc m820

Looks like the bike from this post: New M820 frame from Seraph/TanTan, the E67.

 

[clix]

Does anyone knows what is the peak power of the M820 in the highest mode ?
I cannot find it, I'm trying to source good 21700 cells and I want to be sure to have the right Amps rating!

Wouldn't be easier for you to just order old style battery, with 2 screws instead of new with 4 screws, and somehow modify the fixation points and charging connector? If it is in stock, of course.

Where I am from, even the standard, samsung 18650 cells are cca 10€ each. So 12s*2p*10€ is 240€. Than you have to buy BCM, bulid everygin and still figure out fixation and charging connector. And you also need the charger...

I believe, this is what @O38 did. It looks like much less hassle, than complete build. And not much more expensive.

 

[brbr]

Wouldn't be easier for you to just order old style battery, with 2 screws instead of new with 4 screws, and somehow modify the fixation points and charging connector? If it is in stock, of course.

Where I am from, even the standard, samsung 18650 cells are cca 10€ each. So 12s*2p*10€ is 240€. Than you have to buy BCM, bulid everygin and still figure out fixation and charging connector. And you also need the charger...

I believe, this is what @O38 did. It looks like much less hassle, than complete build. And not much more expensive.

I’ve asked if they had stock but apparently my motor seller has no stock on the old battery.
Also, I plan doing a temporary 12s1p, cells Îve checked are around 5€ piece.
60€ for the cells, 20€ for BMS, 20€ for connectors and wires… +paying the guy who will do it, because I don’t have time right now…

 

[brbr]

it's using BT14 but still the old version without connector and need to modify the battery by own,
sure2 will take some photos for the headset for you..

Hey, do you have pics of the battery connector and the holes that you modified ?

 

[Bengy22]

Does anyone knows what is the peak power of the M820 in the highest mode ?
I cannot find it, I'm trying to source good 21700 cells and I want to be sure to have the right Amps rating!

IIRC the max wattage I remember seeing someone observe was 650w in the of the build threads using the m820 with a 36v battery. So somewhere around 16a on a full charge. I also found someone claiming the bafang battery they got was rated for 18a max. But you are running a 43v motor so less amps for the same watts, roughly 13a (this assumes the higher voltage motor still gets caped at the same watts). Imo because you want to go with a 1p config go samsung 50s and be done with it, high capacity and high amp rating. Mate sure the battery builder spec's the series connections good enough though, double up on nickel or go copper.

I'm interested in though if bafang did limit the amps on the higher voltage m820's to peak around the same as the 36v, but at the crank that would mean less torque more rpms (assuming its just a software difference between motors, because I highly doubt they have 3 separate production lines for each voltage config). If they didn't limit the amps that would mean the same torque figures but more rpms, and of course higher peak watts.

 

[temon10]

Does anyone knows what is the peak power of the M820 in the highest mode ?
I cannot find it, I'm trying to source good 21700 cells and I want to be sure to have the right Amps rating!

peak power for 36v m820 is around 590w

 

[temon10]

Interesting with red-gold, can U confirm the spec @JimLee-Lightcarbon ?

 

[brbr]

IIRC the max wattage I remember seeing someone observe was 650w in the of the build threads using the m820 with a 36v battery. So somewhere around 16a on a full charge. I also found someone claiming the bafang battery they got was rated for 18a max. But you are running a 43v motor so less amps for the same watts, roughly 13a (this assumes the higher voltage motor still gets caped at the same watts). Imo because you want to go with a 1p config go samsung 50s and be done with it, high capacity and high amp rating. Mate sure the battery builder spec's the series connections good enough though, double up on nickel or go copper.

I'm interested in though if bafang did limit the amps on the higher voltage m820's to peak around the same as the 36v, but at the crank that would mean less torque more rpms (assuming its just a software difference between motors, because I highly doubt they have 3 separate production lines for each voltage config). If they didn't limit the amps that would mean the same torque figures but more rpms, and of course higher peak watts.

yeah I was planning for other cells because the 50S are not available on several stores I've checked, but you're right, they clearly have the specs I need!

 

[Bengy22]

yeah I was planning for other cells because the 50S are not available on several stores I've checked, but you're right, they clearly have the specs I need!

I'm not sure how prices are in France but in the USA the 50s is 2x the cost of a 50e, maybe worth considering a 2p config that way you don't have to wait and you also will get 2x the capacity or range. And with 2p you don't have to worry about the amp ratings anymore

 

[brbr]

I'm not sure how prices are in France but in the USA the 50s is 2x the cost of a 50e, maybe worth considering a 2p config that way you don't have to wait and you also will get 2x the capacity or range. And with 2p you don't have to worry about the amp ratings anymore

Your right, that’s worth checking it!

 

[Goff]

View attachment 118922

Hi Jim

this frame looks interesting, can you please tell us more details

 

[Bluicie]

Hi Jim

this frame looks interesting, can you please tell us more details

View attachment 118983

There is already a topic about this frame with some more info. No response from LightCarbon yet.

LightCarbon LCE971, VPP/DW, Bafang M510/M600/M560

 

[JimLee-Lightcarbon]

Looks like a xc m820

Hi my friend,
the frame you asked is LCE929, The sister version o LCE930, with the same rear triangle，Just because of changing the rear shock to a horizontal position, some changes were made to the linkage and carbon layup orientation of the front triangle.

 

[JimLee-Lightcarbon]

Looks like the bike from this post: New M820 frame from Seraph/TanTan, the E67.

LCE929 is a common mold, which can save development costs, several buyers from different fatories want a frame also fit for M820, so we and others designed it, now only size M passed the test.
LCE930 is our private model of LC, it can be sold only with our permission.
We do not evaluate the commercial behavior of our peers, but product quality and delivery time and service of after-sell will prove everything.

 

[JimLee-Lightcarbon]

There is already a topic about this frame with some more info. No response from LightCarbon yet.

LightCarbon LCE971, VPP/DW, Bafang M510/M600/M560

LCE971 now only size M passed test and mass production will be later, size L need more than two months,
the rear shock is standard 210*55mm
the battery is not bafang's battery, the box is SYR new youth, now not confirm the battery supplier,