Bafang BBS02B 750W 48V Mid Drive Motor Identification

[Orion Supernova]

So,
AAR after the first day of use.

Starting battery status: 87%
Average speed: 26.7km/h (Assisted by pedaling on highest gear at all times).
Most consistent speed seen was around the 33 to 35km/h.
Max speed: 59.5km/h
Most consistent power usage between 250-500w, although i realized that my DPC18 display only displays up to 750w power usage.
Time per direction 17 minutes
Distance travelled: 6.7km each way.
Change in elevation in the morning from point A to point B: 29m, almost entirely down hill.

Battery charge when arriving at point B: 51%

Battery ran out of juice about 2km from home on my return trip, trip was exaclt the same as stated above, just reversed.
I watched the battery status drop from 7% to 0% in one tick towards the end.
After about 30 seconds of pedaling without throttle, and me dropping it down from the 5th setting to the 1st, i got back 4% battery and that got me home the rest of the way with no change to that percentage.

Looks like i'm only going to get about 14km on a full charge of battery and on the 5th power setting, even if i don't try and push the motor to use all 1000w.

 

[tomjasz]

Shite battery!

 

[Gionnirocket]

Milage is very hard to quantify as there are so many variables... That said that is extremely poor performance even with a small battery and hardly pedaling.
For example I'm averaging from 8.5wh used per mile.... and that's in the cold of winter. But I'm working as hard as the motor if not more.

What are your new battery specs?
How much are you pedaling ?

I hope that they haven't swapped out a crap motor for a crap battery... smh...

Shite battery!

I concur

 

[AHicks]

Shite battery!

Rookie driver likely not helping anything here either. If he's like most of us, after riding it for a while, I'll bet he can double that 14Km range with very little extra effort.

 

[tomjasz]

Rookie driver likely not helping anything here either. If he's like most of us, after riding it for a while, I'll bet he can double that 14Km range with very little extra effort.

Rookie driver likely not helping anything here either. If he's like most of us, after riding it for a while, I'll bet he can double that 14Km range with very little extra effort.

Double is only 17 miles. I get more with 10Ah.

 

[Gionnirocket]

Double is only 17 miles. I get more with 10Ah.

I concur... even @3x that's pretty poor.
His last battery was 15ah...I'm assuming that the new is comparable

 

[AHicks]

Double is only 17 miles. I get more with 10Ah.

Fine. How SHOULD I have answered the question if you don't mind?

 

[Gionnirocket]

Fine. How SHOULD I have answered the question if you don't mind?

I believe he used an !
Not a ?

 

[tomjasz]

Jeebus, touchy-feely.

 

[Orion Supernova]

Here's the new battery.

I'm yet to get the motor hooked up to the pc to read the specs.

 

[Gionnirocket]

Here's the new battery.

I'm yet to get the motor hooked up to the pc to read the specs.

Yeah you should be getting more out of the battery.
Fully charge it to see if it will accept a full charge as that is one indication of bad cells. Then run it down to see at what voltage it cuts out.
On the display settings.. change the Battery to show VOLTS as % is notoriously mis_calibrated
On the other end it could also be lower rated cells not totalling 15ah

 

[tomjasz]

Sadly many batteries are sold and don’t meet the claimed Ah.

 

[Orion Supernova]

No riding today due to forecast rain.

I plan to connect the motor to the pc tonight and see what information I can get from it, and what settings in can play with.

Will ride the bike tomorrow on a full charge and we'll see how that goes.

 

[Gionnirocket]

Sadly many batteries are sold and don’t meet the claimed Ah.

Well to some extent you will never get full Ah out of a battery as that rating is the sum of all the cells full rating and the BMS will shutdown before you get to empty.
But yeah... Some battery ratings seemed to be pulled out of hat while others fall short with crappy cells

 

[tomjasz]

Well to some extent you will never get full Ah out of a battery as that rating is the sum of all the cells full rating and the BMS will shutdown before you get to empty.
But yeah... Some battery ratings seemed to be pulled out of hat while others fall short with crappy cells

Luna, UPP, and many others....

 

[tomjasz]

No riding today due to forecast rain.

You won't melt! Kidding of course!

 

[Gionnirocket]

Luna, UPP, and many others....

Have you tested any of your JM batteries?

 

[tomjasz]

Have you tested any of your JM batteries?

Yup. As advertised.

 

[Orion Supernova]

 

[Orion Supernova]

Ok, a couple of questions, firstly, how can i get my display to show things in Km/h and not m/h?

Secondly, is there a way to get trip information out of my motor?
IE: distance travelled, power provided over time graphs, velocity over time graphs, etc?