M820 Bafang - LIGHTCARBON LCE930 Frame (lightweight)

[mike_kelly]

Anybody have this problem on their build? Everything works great but if I leave the bike sit for an hour or so I'm unable to turn it back on I have to plug and charger unplug it and then system will turn on. Video attached.

I have seen batteries that have an auto-storage system. Lion batteries are best stored at about 66% of their max charge. So smart batteries will discharge the battery if it sits for X amount of time so that it is stores at the 66% level. Then to re-activate the battery you need to put the charger on just like you demonstrated. But the time period is usually days not hours. So it may depend where you got your battery.

 

[Utility]

It's the new bafang BT F014. I ordered the whole kit from Wendy Joyebikes on alibaba.

Light carbon Video show these wires being attached but I don't have that option. This may be problem

 

[mike_kelly]

It's the new bafang BT F014. I ordered the whole kit from Wendy Joyebikes on alibaba.

Light carbon Video show these wires being attached but I don't have that option. This may be problem

Canbus is a daisy chain topology. Meaning the bus(cable) connects to the in on one device and an out to the next device. Since there is only one connection on the motor, that goes to the display (and that connector that goes to the display tells you by shape and color which are the canbus connections) there must be a connection from the battery to the motor for canbus and then a connection from the battery to the display. Or some splitter cable that allows the canbus on the motor to be shared between the battery and the display.
So if the battery is smart and uses canbus to communicate that would explain why your battery is shutting off, possibly.

 

[Utility]

- YouTube

Enjoy the videos and music that you love, upload original content and share it all with friends, family and the world on YouTube.

youtube.com

 

[brbr]

- YouTube

Enjoy the videos and music that you love, upload original content and share it all with friends, family and the world on YouTube.

youtube.com

I think there are some posts on this forum about the cable type that is needed. I understood that there are different cables, it might be the issue

 

[brbr]

I think there are some posts on this forum about the cable type that is needed. I understood that there are different cables, it might be the issue

I’ve found the messages I had with the motor vendor, you need a 1T3 cable.

 

[Goff]

Anybody have this problem on their build? Everything works great but if I leave the bike sit for an hour or so I'm unable to turn it back on I have to plug and charger unplug it and then system will turn on. Video attached.


View attachment 125279

Hi I have had similar problems with other ebike mostly after riding in the rain, my findings was with the battery BMS so you may have a wiring problem if you have another battery or range extender you could try that would eliminate any issues with the bike wiring, motor etc.
Battery bms are sensitive to any shorting and will switch off, then reset.

 

[mike_kelly]

I’ve found the messages I had with the motor vendor, you need a 1T3 cable.

View attachment 125284 I don't know what the two wires with spade lugs are for but they are not canbus (green) cables because canbus is a 4 wire connection.

 

[brbr]

It’s for light
There's light, battery, display

 

[Utility]

I’ve found the messages I had with the motor vendor, you need a 1T3 cable.

View attachment 125284

Yes, that looks correct.

 

[JimLee-Lightcarbon]

The main cable you got is wrong, the cable you got is for M500/M600, without the green port, but with a yellow triangular port

 

[Utility]

The mail cable you got is wrong, the cable you got is for M500/M600, without the green port, but with a yellow triangular port

Thank you for you response

 

[kaylee.s]

I am also missing the canbus connection for my bike. It would not turn on today, totally dead. My cable is one single cable to go from the display, to the motor. Nothing else. After the delay of the battery, and all the wrong and missing parts I've experienced. I do not recommend purchasing from fieldebikes.

 

[TobyB]

I haven't received my battery but I ordered two kits for my frames that are coming and these are the cables I received with the motors that have arrived. I have two of the green ones that plugs into the handlebar controller but I have two variations on the blue cadence sensor cable, one that is the same as the installation video and another that is longer that also has the red and black connector options in addition to the blue end.
I guess one is wrong? or does it not matter?
Thanks
Toby

 

[kaylee.s]

Those both look wrong. I think we need a cable that plugs into the display on one end, and at the motor end it should plug into both the motor and battery. The battery plug is a round green connector.

 

[lalaland]

I haven't received my battery but I ordered two kits for my frames that are coming and these are the cables I received with the motors that have arrived. I have two of the green ones that plugs into the handlebar controller but I have two variations on the blue cadence sensor cable, one that is the same as the installation video and another that is longer that also has the red and black connector options in addition to the blue end.
I guess one is wrong? or does it not matter?
Thanks
Toby

View attachment 125450 View attachment 125451 View attachment 125452

The green one is to connect to canbus display.
And the blue is to connect to your speed sensor.
Those red/black is power for lights.

 

[TobyB]

Those both look wrong. I think we need a cable that plugs into the display on one end, and at the motor end it should plug into both the motor and battery. The battery plug is a round green connector.

I definitely don't have that cable with a round green connector on my main cable, just the wire outlets for lights it seems, but my battery is due to arrive later this week maybe it would come with that? I also don't have the battery charger cable but I assume that will come with the battery.

Will it work and be fine like this or likely to cause issues to the motor? Did you reach out to your Vendor @kaylee.s ? Are they sending the correct ones?

Thanks

Toby

 

[kaylee.s]

I definitely don't have that cable with a round green connector on my main cable, just the wire outlets for lights it seems, but my battery is due to arrive later this week maybe it would come with that? I also don't have the battery charger cable but I assume that will come with the battery.

Will it work and be fine like this or likely to cause issues to the motor? Did you reach out to your Vendor @kaylee.s ? Are they sending the correct ones?

Thanks

Toby

It will power up and work, but without the canbus hooked up the battery will turn off and go to sleep. You have to wake it up with the charger.

My vendor, fieldebikes, is apparently checking pictures they took before shipment before agreeing to do anything.

 

[TobyB]

Hey @kaylee.s , When you say your powers on, are you able to take it out for a ride? Do you think you'll try and order the cable from somewhere else or wait for the vendor to send you the correct one? I can't even seem to find the one with a green circle to buy online, I'm assuming they are specific to the m820? I see this one linked below, but the round connector is yellow and It states it's for a throttle. @brbr mentioned we would need the It3 cable, but this one doesn't look right.
Thanks for the help!

Robot or human?

www.walmart.com

 

[brbr]

Hey @kaylee.s , When you say your powers on, are you able to take it out for a ride? Do you think you'll try and order the cable from somewhere else or wait for the vendor to send you the correct one? I can't even seem to find the one with a green circle to buy online, I'm assuming they are specific to the m820? I see this one linked below, but the round connector is yellow and It states it's for a throttle. @brbr mentioned we would need the It3 cable, but this one doesn't look right.
Thanks for the help!

Robot or human?

www.walmart.com

The reference in my order is eb1t3

 

[TobyB]

Thanks @brbr
According to this Alibaba link, I seem to have the BF EB BUS-1T2 cables. They have the BF EB BUS-1T3 available it seems but the circular connection is next to the green connector and is yellow. The green connects to the handlebar controller so this 1t3 is different and it states the yellow is for a throttle, is the cable too new to be available as a spare? I guess I need to reach out to my supplier. Thanks for the help, everyone.

https://www.aliexpress.us/item/3256805210966915.html?src=google&src=google&albch=shopping&acnt=708-803-3821&slnk=&plac=&mtctp=&albbt=Google_7_shopping&albagn=888888&isSmbAutoCall=false&needSmbHouyi=false&albcp=19235666539&albag=&trgt=&crea=en3256805210966915&netw=x&device=c&albpg=&albpd=en3256805210966915&gclid=Cj0KCQjwvL-oBhCxARIsAHkOiu2sRX5MfH3bGjcESFhi_sBI0dHg5M17M7AdYpdpv2oL9h-P_jYaw2AaArLkEALw_wcB&gclsrc=aw.ds&aff_fcid=326754991b424eb983765d24480e823c-1695623102685-07243-UneMJZVf&aff_fsk=UneMJZVf&aff_platform=aaf&sk=UneMJZVf&aff_trace_key=326754991b424eb983765d24480e823c-1695623102685-07243-UneMJZVf&terminal_id=a40ba849e8644ecd924416c5df0fee90&afSmartRedirect=y&gatewayAdapt=glo2usa

 

[patdam]

somebody have tested if throttle (yellow connector) could functioning on M820 ?

 

[JimLee-Lightcarbon]

Thank you for you response

In addition, the external charging port have a rubber plug

 

[JimLee-Lightcarbon]

I haven't received my battery but I ordered two kits for my frames that are coming and these are the cables I received with the motors that have arrived. I have two of the green ones that plugs into the handlebar controller but I have two variations on the blue cadence sensor cable, one that is the same as the installation video and another that is longer that also has the red and black connector options in addition to the blue end.
I guess one is wrong? or does it not matter?
Thanks
Toby

View attachment 125450 View attachment 125451 View attachment 125452

both are wrong, the battery with a green port to connect the main cable, so the main cable also have a green port,

 

[temon10]

In addition, the external charging port have a rubber plug

View attachment 125460

what part number is it? can we buy not from bafang?

 

[JimLee-Lightcarbon]

what part number is it? can we buy not from bafang?

This is the gasket that comes with the external charging port. Please ask your motor supplier.

 

[brbr]

Guys, HELP

I have received battery and BESST tool but I have no idea how to make the BESST tool to work. I've tried connecting few cables but I have a read error on the BESST software.
I basically connected the battery to the motor, then the display to the motor and the BESST tool to the remaining plug available on the display cable (I think t'supposed to be used for battery communication, what did I do wrong ?

 

[patdam]

Guys, HELP

I have received battery and BESST tool but I have no idea how to make the BESST tool to work. I've tried connecting few cables but I have a read error on the BESST software.
I basically connected the battery to the motor, then the display to the motor and the BESST tool to the remaining plug available on the display cable (I think t'supposed to be used for battery communication, what did I do wrong ?

BESST wiring does be interfaced between motor and HMI (display), only these 2 connector will be used for CAN bus

 

[brbr]

BESST wiring does be interfaced between motor and HMI (display), only these 2 connector will be used for CAN bus
View attachment 125514

Thanks! That was my mistake! I did not plug it where it was supposed to be, at all!

 

[brbr]

the prototype for the lights is now ready! Y connector from the battery to plug the motor and the dc dc converter. The DC DC converter then delivers power to the 12v relay and the 12v relay is triggered by the 12v light output of the motor, it works great, now, I hop everything will fit when the battery is in...