Wish List to Bafang for BBS01/02

greenspark

greenspark

100 W
Joined
Oct 23, 2011
Messages
176
Enough BBS01/02 drives are now in service for users to make recommendations as to what they would like to see Bafang change to make them great. If the ideas put forth are good, and the thread does not get cluttered with drivel I will alert my contact at Bafang to have a look. In making comments:

1) Please state if you own or have tested a BBS01/02 motor. Your comments will carry more weight if you have actual experience.
2) Please do not ask for stuff that clearly would exceed the engineering envelope. They make two motors, the low Watt 250/350W and the higher 500/750W. It is unlikely they can make a more powerful motor inside the casing
3) It is what it is. If you want to have a thread on a different motor, start a new thread. This is a thread only for this motor, not for another non-hub Motor Drive.
4) Please do not hijack this thread. There are a number of active posters who appear to be lonely and therefore comment on threads in lieu of a social life. Please do not use this thread. I'm trying to accomplish something.
 
Wish List Item One:

Decouple the Thumb Throttle from the PAS (pedelec), so it provides full power regardless of the PAS setting, including being set on zero.

(If you agree with this wish list item, please quote and comment)
 
Wish List Item 2

Design the Display connection so the digital display can be disconnected and an analogue On/Off and 1-2-3 switch can be connected in its place.

The display provides useful information, but as a plastic electronic part that can be easily damaged in a crash, vandalised because it is obvious, corroded over time because it is electronic and exposed to sun, rain, salt and the elements, it is the most likely part to fail early. When it does, Bafang will have moved on, thus buying a replacement will be hard. Also, the design of the (+)/(-) switch is not ergonomic. Pressing it three times to drop from three to zero every time one reaches the peak of the hill is not as easy as a quick flick of the switch. The two critical functions of the display are (1) Power On and (2) set power (1, 2 or 3). Both can be done with analogue switches and such switches are on the market now. It would be desirable that they are wired so it is an instant replacement (meaning you unplug the display unit, and plug in the O/O 1-2-3 switches and it will turn on and apply partial or full power)

(If you agree with this wish list item, please quote and comment)
 
Wish List Item 3

Instant power-off but keep the system on. This would be an on-off button that can be wired into the brake connector.

At present, when pedalling under power, one has to depress the display control button three times to go from 3 down to 2 down to 1 down to zero. This is a lot of switching.

Yet when one presses the brake, it immediately cuts power to the the motor, without shutting off the system. As soon as it is released, power returns. It should be easy to splice in an on-off switch that replicates the brake action, but without being connected to the mechanical brake. Press the button and the motor quits. Press it again and the motor kicks in at the speed setting on the display. Thus, the rider uses power going up a hill and as soon as they hit the crest, they press the button and the #3 setting (full power) motor assist drops out, but the setting remains displayed. As soon as they hit the next hill, they press the button again and it resumes power at the full #3 setting.

I imagine this as a simple button with two wires that uses a male/female connector that is plugged in between one of the ebrake connectors.

(If you agree with this wish list item, please quote and comment)
 
greenspark said:
Wish List Item One:

Decouple the Thumb Throttle from the PAS (pedelec), so it provides full power regardless of the PAS setting, including being set on zero.
(If you agree with this wish list item, please quote and comment)
Click to expand...
I think this one is very important, because it gives you the possibility to set a certain speed with the PAS, but still gives you that extra grunt if you need it.
 
greenspark said:
Wish List Item 2

Design the Display connection so the digital display can be disconnected and an analogue On/Off and 1-2-3 switch can be connected in its place.

The display provides useful information, but as a plastic electronic part that can be easily damaged in a crash, vandalised because it is obvious, corroded over time because it is electronic and exposed to sun, rain, salt and the elements, it is the most likely part to fail early. When it does, Bafang will have moved on, thus buying a replacement will be hard. Also, the design of the (+)/(-) switch is not ergonomic. Pressing it three times to drop from three to zero every time one reaches the peak of the hill is not as easy as a quick flick of the switch. The two critical functions of the display are (1) Power On and (2) set power (1, 2 or 3). Both can be done with analogue switches and such switches are on the market now. It would be desirable that they are wired so it is an instant replacement (meaning you unplug the display unit, and plug in the O/O 1-2-3 switches and it will turn on and apply partial or full power)

(If you agree with this wish list item, please quote and comment)
Click to expand...

The 1-2-3 switch Would make the ride much more comfortable. It would also be less susceptible to theft and it could even be a kind of key. If the display or button is not connected it is impossible to use the engine.
 
WishList Item4:

The possibillity to add an external torque sensor or have a built in one. With a torque sensor i don't mean a cheap "on-off" one but a sensor that measures gradually the leg-power you are adding and gives depending on your settings gradually more power.
But the torquesensor should work together with the PAS-controller, in that way it is possible to tell the controller which level of assistance you would want. Only PAS is a "dumb" system, it just gives a fixed amount of power regardless off the fact you are pushing your cranks or just turning them.
 
Please include with the kit a hydraulic brake cut off option, a simple tee pressure switch that can be fitted in a standard brake line would be perfect.
 
Wishlist 5: A technical drawing of the BBS02 including a crossection of the engine (don't need the internals) Because the engine is very often used for DIY projects which means different bikeframes, it is sometimes very difficult to "guess"if the engine will fit. With a right crossection you can print out the engine in real size and test if it will fit. With the existing drawings off the BBS01 it is still very difficult to see if the engine will fit because you can't see the actual space between the BB and the engine.
(If you agree with this wish list item, please quote and comment)
 
A built in cadence sensor on the display would be a nice feature which would also aid novice riders in correct gear selection. An up/down arrow, rpm number or both would be perfect.
 
greenspark said:
Wish List Item One:

Decouple the Thumb Throttle from the PAS (pedelec), so it provides full power regardless of the PAS setting, including being set on zero.

(If you agree with this wish list item, please quote and comment)
Click to expand...

This might be a good idea on lower powered units however on the 750W unit, 100% decoupled throttle is quite twitchy due to the throttle only operating from about half way position to the full throttle position. A more linear throttle that operates over the full range of motion would be a desirable addition for this wish list item (IMO).
 
Wishlist item 8:
pjgold said:
Please include with the kit a hydraulic brake cut off option, a simple tee pressure switch that can be fitted in a standard brake line would be perfect.
Click to expand...

(If you agree with this wish list item, please quote and comment)

sorry for quoting you but i just wanted to number it: this makes it easier to list them up
And Yes i think this is also a very valuable extra, because most of the e-bikes (should) have hydraulic brakes.
Another option would be to offer the set without brakes so we could buy our own hydraulic brakes with e-switch (eg: tektro auriga e-comp)
 
wishlist item 9:
Software: removable speedlimiter, but in a proper way, not by cheating with wheeldiameters or miles vs kilometers, because this messes up the lcd readings.
 
wishlist item 10:
cruisecontrol: in fact this is very similar to wishlist 3
Have the possibillity to set a certain speed, kill it by braking and set it again by pushing one button.
 
Kepler said:
greenspark said:
Wish List Item One:

Decouple the Thumb Throttle from the PAS (pedelec), so it provides full power regardless of the PAS setting, including being set on zero.

(If you agree with this wish list item, please quote and comment)
Click to expand...

This might be a good idea on lower powered units however on the 750W unit, 100% decoupled throttle is quite twitchy due to the throttle only operating from about half way position to the full throttle position. A more linear throttle that operates over the full range of motion would be a desirable addition for this wish list item (IMO).
Click to expand...

Another solution could be a pushbutton which gives 100% power but with a nice slope in power (in the perfect world you could change this "ramp up" of the power in the settings according to your own preferences)
 
Kepler said:
Wishlist item 7
Watts and W/hr's displayed on screen so that accurate assessment of power consumption and battery condition can be a made.
Click to expand...
On the C695 display watts are displayed (and it is surprising how quickly it changes) but no W/hr to my knowledge
 
Wishlist #11 More gears on front chain ring.

Currently 46 and 48 tooth is offered. Originally the specs called for a wider range, starting at 36 teeth. This is probably due to the "bump" that hides the internal gear or chain that connects the motor and the bottom bracket. The most desirable would be to allow the bikes current chainring and crank to be used, which would mean no changing of chain length, and retaining the original look. This would require re-engineering and probably would not come until a second release of the motor.
 
Wishlist #12 - Better spacers for display mounting
This one is a minor niggle, but when one is a shop assembling bikes with the kit, and charging $1 a minute, delays can add up.

The ebrakes, thumb throttle and the C691/695 display controls all mount fine and fast on the standard handlebar. However when one goes to install the display unit, the mounting spacers are either too loose or they are too tight. It's a two part spacer. To make it fit, we have to remove and discard the inner spacer and then insert cut off zip tie plastic as shims until we get it to where on screwing it holds tight. The alternatives are wrapping the handlebar with tape or cut innertube. All of these steps add time. As noted, it's a minor niggle, but since we're listing everything, I'll add this one.
 
Wishlist #11 More gears on front chain ring.

Currently 46 and 48 tooth is offered. Originally the specs called for a wider range, starting at 36 teeth. This is probably due to the "bump" that hides the internal gear or chain that connects the motor and the bottom bracket. The most desirable would be to allow the bikes current chainring and crank to be used, which would mean no changing of chain length, and retaining the original look. This would require re-engineering and probably would not come until a second release of the motor.
Click to expand...

I would prefer a standard 130mm BCD crank. The kit can come with 46T or 48T ring, but this would at least allow for easily swapping chainrings.
 
greenspark said:
Wish List Item One:

Decouple the Thumb Throttle from the PAS (pedelec), so it provides full power regardless of the PAS setting, including being set on zero.

(If you agree with this wish list item, please quote and comment)
Click to expand...

+1 This will be really useful say if I use PAS level 1 most of the time but do want to have full power when going up hill. This saves the hassle of switching PAS level up, throttle and then switch it down again.
 
My application: BBS-01 in a kid's bike for my son with one bad hip.

Thumb throttle do give a good shove to start, but cut-off at 5 mph/8 kph. Complies with electric wheelchair regulations.
With one weak leg it can be a problem to start from zero.

And I agree with: Display-less and 0-1-2-3 switch like already mentioned.
I'd like to buy the "de Luxe" C695 display as an accessory
 
does somebody from Bafang read this Thread?

I would like to get information about a connector or how to connect to change some parameters
 
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