More power from my 36V 250W Bafang ? (10Ah LifePo4)

Hallo Pedelec-Forum ! (sorry, I do not speak German )

My hub motor is a geared brush-less hall-sensor-less Suzhou 8-Fun SWXK (side-entry cable instead of axle/spindle) 36V 250W 255RPM, laced into a 16-inch front Brompton wheel. Here's my build log by the way: http://www.pedelecs.co.uk/forum/ele...ved-bafang-tongxin-kits-photos.html#post59183

With my Cycle Analyst display, I noticed that the current draw rarely climbs over 10A, or just under 400W peak. This matches the 1C rating of my 36V Li Ping LiFePo4 battery (10Ah capacity), and it only occurs for short bursts, i.e. when climbing hills (by the way, the voltage doesn't sag with this kind of discharge). This also seems to be the factory rating of the motor itself, so I am using it within the designed tolerances.

Given that the Bafang is known to be reliable when "overclocked" to 48V, I wonder if I should be able to "push" more power into the motor with my current 36V setup ? I think the power cutout currently programmed into the controller is around 12/15 Amps, but I need to figure how much exactly. The Ampere limit on the Cycle Analyst is way greater, I am not actually using that protection feature yet.

According to Li Ping's specifications, the battery is able to deliver more power: Rated Discharging Amperage: 10 Amps Max, Continuous Discharging Amperage: 20 Amps, Maximum Discharging Current: 40 Amps Discharging, Cut-off Protection: 25-30 Amps.

http://www.pingbattery.com/servlet/the-8/36V-10AH-V2.5-LiFePO4/Detail

So, can I technically get more power out of the Bafang if I increase the controller protection threshold ? The controller is from e-Crazyman / Keywin Ge, so I could use the ParameterDesigner.exe software to modify the default settings (I purchased my kit from Frank ).

Many thanks, Cheers, Daniel

AW: More power from my 36V 250W Bafang ? (10Ah LifePo4)

i have a faster turning Bafang, its rated for 24V
and I use a 14A controller

14A on a hill going not too fast does by far not feal double power compared to 7A

so: yes you can for sure get more power out of the bafang (most probably with more wear on the gears and even the risk of gear-failure on some point)
but in my opinion is the little more power not worth the lot more energy-consumption of the motor
(all with 36V... 48V oder more is something different)

if i were you, i would stay happy with the 15A limit and let it be there
(less stress for motor, battery)

AW: More power from my 36V 250W Bafang ? (10Ah LifePo4)

Thank you very much for the advice