Hi Fourbanger, the measurement changed when i went form eyeballing it and guesstimating and getting out the calipers, for the greenpedel motor it is sitting in a box abandoned because the motor was not a bafang. it had a plastic ring gear and the motor rotor was horribly unbalanced and i was at the time happy with the smaller oil cooled old bafang hub i modded the same way as the one above. Those older bafang minis with steel gears added, oil cooling and beefed phasewires it was a 14t terminated in delta. The one above is its replacement on the same bike but with smaller wheels as in the pictures. The older bafang minis were very wide more than 150mm across the locknuts and this made the gear shifting terrible under pedaling and only 7 of the 8 speeds could be used without the chain coming off.
pedaling the bike with the new cassett motor is a dream with perfect shifting and a 9 speed cassett. The battery design is nearly complete as are many of the pack components, I'm itching to ride it with the motor working, its twice the motor of the little old bafang minis and thinner lams to, the old minibafang was fed a diet of 75 phase amps 45 battery amps but needed delta termination to get over the 35 amp phase mark without saturating, the xf15 has much larger gears and clutch than the old mini as well
40 a123 20 ah pouch cellls are all tested for capacity and all have IR between 3.5 and 2.1 milliohms probably varying with temperature mare than anything. 14 with lowest IR will be used in the pack.
battery pack components made so far:
celltab clamp busbar and insulator stacks are ready,
the heat sink fins for the battery terminals are ready,
the battery case bottom half made from 3mm alloy removed from a dead plasma mass spectrometer (is not 5000 series peanutbutter alloy )
bms has been tested on 14 shitty laptop cells and works fine and balances the trash cells quick its a chargery bms16
controller heatsink and fan arrangement are ready for insertioon in to hte battery box where they will warm the battery with waste heat during cold weather 5 degree temps in winter sometimes means it takes less energy to heat the battery to 25 degrees than you loose in the high ir of cold cells and you get stiffer voltage.
second fan and the controller for both fans are tested, the second fan will cool the pack and controller with lots of airflow when needed on a thermostat speed control summers here are very hot so it will need it.
controller is a vesc 6.6 from flipsky.
more to come