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HI d8veh, I've bypassed the switch side & the bike works perfectly - loads of torque - it all looks great. I'm a little torn about whether to actually replace the BMC or use it as is, just ensuring I recharge before the voltage gets too low (using the indicator LEDs on the handlebars). The...

In the pic above, the batt -ve is on the left. Under no load, so switched on I guess, The gates on the pair of FETs there are at 0V. The gates on the pair on the right are at 5V. the output is at 0V. If I then connect a load & "trip" it, the output goes up to 40V, then slowly decreases the gate...

those voltages were measured on the PCB - it has nice test points by the balancing plug. I'm not quite sure what you mean by the shunt(s) - are they the 4 large power MOSFETs that are doing the switching? pics of both sides of the board, in case they help: Given the intermittent behaviour...

Here goes - voltages whilst under load: 40.2 36.1 32.1 28.0 23.9 19.9 15.9 11.9 7.8 3.8 0.1 (the 0.1 was the voltage drop over the wire whilst under load) so the individual cells are: 4.1 4.0 4.1 4.1 4.0 4.0 4.0 4.0 4.1 4.0 3.7 So one cell is a good bit worse than the others. I repeated the...

Got it. The pack ref. is AE906313PM1H2E (37V 14Ah 518Wh EA) pic of cells: I can do a full test on the bike later, but I've done a quick bench test now... Batt voltage under no load: 41.1V voltage whilst running small DC fan drawing 2.9A directly: 40.2V (and on disconnecting comes back up...

Hi d8veh, That's wierd - I posted that diagram yesterday with a whole load of text, but the text has vanished...... Lets tray again: This is a drawing of the wiring of my BMC: I want to bypass it for powering the bike, but leave it working for balanced charging as you suggested. As far...

d8veh, Wow - thanks - that's really given me some insight - I get it - I''l give it a go at the weekend. I always watch the lights on the display anyway & re-charge before it's sitting on red. Thanks again, James

Hi there - a Newbie to the forum here. I've got an Ezee electric bike, powered by a 36V 14Ah Li Ion battery. It was great, then the battery just stopped working at all, then it started working again, then it stopped, and I took the battery to bits. I used my LiPo balance charger (for models)...