Bafang m820

[mike_kelly]

On my Orbea there were spyders that could replace the direct mount chainring. That would get you what you want. I don't know if it is available for the bafang motor. But it would be logical that it is how that picture of the road bike with two chainrings.

 

[mike_kelly]

A quick google search yields one for the m600.

Bafang M600 Atlas 4 bolt crank spider

Bafang M600 crank spider for Atlas does not include chain wheel!

evelo.com

 

[fenomeno]

If anybody can check if this
ROTOR Bike Components
can be installed in a bafang m820, I will be delighted.

 

[fenomeno]

When you install this motor, it is obligatory to use the battery from Bafang?
If not that I guess it is the answer to my question the display will have battery info?
Thanks...

 

[patdam]

When you install this motor, it is obligatory to use the battery from Bafang?

no, you can use all battery with power supply in line with the controller software: 36V, 43V or 48V

If not that I guess it is the answer to my question the display will have battery info?
Thanks...

yes for the battery power, not for the cells status (informations available with bafang batteries)

 

[fenomeno68]

no, you can use all battery with power supply in line with the controller software: 36V, 43V or 48V

yes for the battery power, not for the cells status (informations available with bafang batteries)

Thanks.
what do you mean with in line with the controller software?

 

[patdam]

Thanks.
what do you mean with in line with the controller software?

same controller but various software following battery power supply value chosen

 

[fenomeno68]

Thanks.
are there any thread where I learn more about how to do it?

 

[patdam]

Thanks.
are there any thread where I learn more about how to do it?

do what ? change software ? see Beest tool threads

BESST tool PRO

I launch this subject to avoid necessity to read all the BESST tool subject to solve an problem link to sheet where BEEST pro can be find https://www.emtbforums.com/threads/bafang-m510.26180/page-31 link to bafang download https://bafang-e.com/en/oem-area/service/besst-pro/ I have installed...

www.emtbforums.com

 

[fenomeno]

do what ? change software ? see Beest tool threads

BESST tool PRO

I launch this subject to avoid necessity to read all the BESST tool subject to solve an problem link to sheet where BEEST pro can be find https://www.emtbforums.com/threads/bafang-m510.26180/page-31 link to bafang download https://bafang-e.com/en/oem-area/service/besst-pro/ I have installed...

www.emtbforums.com

What to do? Use a DIY battery wit Bafang m820 motor...
I sorry but I need a tutorial...

 

[patdam]

What to do? Use a DIY battery wit Bafang m820 motor...
I sorry but I need a tutorial...

Initially i had ordered my CEF50 with an 48V15Ah battery, but at use i have constated that i never consume more than 40% to doing +- the same think than E510 (+- 30km +- 1500D+). i have purchased an generic cheap battery 10Ah from "battery supplier store", received failed (no more than 80% full charged), but enough to see that it's the good solution for my use. i have purchased one more 9.6Ah carbon case from SZZS and it's perfect for me with the M820.

But. request anothers returns. it's seem that somebodies have different advise. They neds range extender for example, while i never consume more than 70% with the 9.6Ah ? I'm heavy (+-100kg), i ride on moutain (pyrenees) and i mostly climb on DFCI. E-biking for me it's clim quietely to go up an funny toy to playfull in downhill. I don't like climb hard technical single. I use the M820 only when i ride alone or with other non assisted MTB. With other E-bike or when i go faraway riding several days (ainsa, tremp, castejon de sos, etc..), i take the M510

 

[fenomeno]

Initially i had ordered my CEF50 with an 48V15Ah battery, but at use i have constated that i never consume more than 40% to doing +- the same think than E510 (+- 30km +- 1500D+). i have purchased an generic cheap battery 10Ah from "battery supplier store", received failed (no more than 80% full charged), but enough to see that it's the good solution for my use. i have purchased one more 9.6Ah carbon case from SZZS and it's perfect for me with the M820.

But. request anothers returns. it's seem that somebodies have different advise. They neds range extender for example, while i never consume more than 70% with the 9.6Ah ? I'm heavy (+-100kg), i ride on moutain (pyrenees) and i mostly climb on DFCI. E-biking for me it's clim quietely to go up an funny toy to playfull in downhill. I don't like climb hard technical single. I use the M820 only when i ride alone or with other non assisted MTB. With other E-bike or when i go faraway riding several days (ainsa, tremp, castejon de sos, etc..), i take the M510

I see you are from Spain, like me. I am from Navarra...
Talking about the technical matters, what have you done in the motor I guess, to change the original battery to SZZS one?

 

[fenomeno]

I have read in the forum that the canbus it is not required...

 

[patdam]

I see you are from Spain, like me. I am from Navarra...
Talking about the technical matters, what have you done in the motor I guess, to change the original battery to SZZS one?

i'm in the other side of the pyrenees, not in spain.

nothing change necessary on motor to use generic battery

 

[patdam]

I have read in the forum that the canbus it is not required...

? can bus necessary for all series M bafang motor. If you speak about battery, you can use battery without can BMS (only bafang provide it), but you can"t monitoring cells status on HMI and BESST tool

 

[fenomeno]

? can bus necessary for all series M bafang motor. If you speak about battery, you can use battery without can BMS (only bafang provide it), but you can"t monitoring cells status on HMI and BESST tool

Thanks.
Then a non Bafang battery is plug and play with the required connector. Where can be bought a connector for the battery to plug in the motor?

 

[patdam]

Thanks.
Then a non Bafang battery is plug and play with the required connector. Where can be bought a connector for the battery to plug in the motor?

for M520 it's XT30. but not necessary to purchase separately, normally battery supplier provide as you request

 

[mike_kelly]

for clarity Patdam probably meant M820 is Xt30, which it is. Battery must be ordered with the xt30 or adapter for xt30.

 

[fenomeno]

for clarity Patdam probably meant M820 is Xt30, which it is. Battery must be ordered with the xt30 or adapter for xt30.

This clarify my everything.
Thanks.

 

[Dado]

Thanks.
are there any thread where I learn more about how to do it?

Hello.

When not connected CAN battery, you will have Battery Info Screen greyed out on your display.

You can check also BBR device if you thinking about tuning and to use 48V battery with 43V firmware. www.k1ebikes.com/bbr

 

[fenomeno68]

Hello.

When not connected CAN battery, you will have Battery Info Screen greyed out on your display.

You can check also BBR device if you thinking about tuning and to use 48V battery with 43V firmware. www.k1ebikes.com/bbr

Thanks.
I left a message in you website that I’m still waiting for answer…
Thanks

 

[MrFixit]

Yes I have done, awaiting outcome. Thanks.

An update, I had been waiting for a replacement bms, which I have recently received. Before I fitted it I checked if there was anything specific that had to be done and discovered that if the connector which carries the wires from each cell is disconnected then reconnected it resets the bms. Which is what I have done. I have not fitted the new bms. The bike now switches back on and runs, however the range has reduced significantly, dropping from 100% to 90% after only 3 kilometres, it dropped to 20% after doing 35k using mostly eco mode with about 600 metres of ascent. In the past I have covered up-to about 50k with more height gain and still had about 30% left. Could some of the cells be faulty?

 

[TobyB]

Hi there, I have a battery question, I have the 43v Bafang m820 and the 410 wh battery. what batteries could I run on this system if I wanted something custom? Will a 52v work? I heard there are 36, 43 and 48 versions of the m820 motor, is that just firmware or are the different units? I have the Bessst tool. Thanks for the info.

 

[Radolf]

You can definitely use the following configurations which I have tested and described in more detail in the M820 software thread:
- FW43V - 13S battery
- FW36V - 11S battery

 

[Waynemarlow]

You can definitely use the following configurations which I have tested and described in more detail in the M820 software thread:
- FW43V - 13S battery
- FW36V - 11S battery

Isn't the 43V battery a 12S design ( 43 /3.6=11.95 ) with the 48V a 13S design ?

Presently using 52V 14S without problems.

 

[Radolf]

The battery construction is as you write, but you can use firmware with the battery constitution as I wrote earlier - you will use the battery potential to a greater extent.

 

[Dado]

Hi there, I have a battery question, I have the 43v Bafang m820 and the 410 wh battery. what batteries could I run on this system if I wanted something custom? Will a 52v work? I heard there are 36, 43 and 48 versions of the m820 motor, is that just firmware or are the different units? I have the Bessst tool. Thanks for the info.

Bafangs are taking one cell up. Just you will get then wrong battery SOC % reading.

This can be vcompensated by K1 BBR, and also it can some other tricks.

You can use 52V battery and 48V firmware.

 

[TobyB]

So could I buy this battery and it work? (storage space aside) Or would it need specific BMS or other things? I'm new to understanding all this.

Pocket Rocket 52V 6ah Samsung 30Q Lithium ion E-Bike Battery | Bicycle Motor Works

The Original Pocket Rocket, uniquely designed eBike Battery by Bicycle Motor Works ~ U.S. Made Please read the full description. Lithium Ion batteries can be dangerously. Make sure you know what you are doing or consult a professional if you are unsure. 52 volts - The ultimate secret weapon for...

www.bicyclemotorworks.com

 

[Waynemarlow]

Why not just buy a 48V battery designed for the frame of your choice. From experience of making a wiring loom, mounts, connectors etc, what you save in cash is way more costly in time not riding your new stead.

 

[TobyB]

I have the 410wh Bafang battery and the bike is running fine, It is more of a curiosity to try and see how the battery weight in a more centrally located area might change handling. My wife has commented the e-bike is a little more nose-heavy than her enduro bike for example off drops.