Recent content by alexon

Thanks a lot, Punx0r and DrkAngel, for your helpful feedback! The purpose of this whole experiment was twofold: to identify which battery packs would need a cell replacement (which would entail individual cell testing with the Opus), and to assess how well the BMS is working; as there is often...

Hi there, It’s me, Alex, reporting back. I went and tested 6 of the 10 packs of my 10S4P battery and got the following results (the official capacity of each pack is 8800 mAh): (By "Cell 1" I meant "Pack 1", etc) That surprised me, because I was pretty sure that packs 1, 3, 4 and 5...

Thanks again! :D That's exactly what I'm doing, discharging the suspect 4P pack with the IMAX. To be on the safe side, I started with 0,5A, but it takes forever. I'll switch to 1A. The pack is supposed to have a 8800 mah capacity, but it's looking like it will reach around 6000. Will report...

Thanks a lot for the quick replies! I just want to identify which of the 10 packs contain damaged cells so I can try to replace those without tearing apart the whole blessed battery :D Once I know which packs are affected, I'll have to rip out the corresponding cells, test them individually...

Hello all, I have a 36V eBike battery made up of forty 18650 cells (10series / 4parallel). Sometimes, when charging the whole battery, the BMS doesn't balance the voltage correctly among the 10 packs. When that happens (which is often), I use an Imax B6 charger to charge each pack individually...

Thanks :D. Following advice I read in a Spanish forum, I discharged the cells that were at 4.26V / 4.27V to bring them down to 4.20V and now I'm charging those with 3.XX volts to bring them up to 4.1V or so. What is the next move? Do I connect the battery to the bike and ride for a while to...

Thanks again. D8veh, are you sure the Imax cannot charge the cells? Why? (That would suck! :?) Anyway, I measured the voltages between adjacent pins: Cell Number____Pins_____________Voltage ___Cell 1_______0-1 (white-red) ___ 3,34 ___Cell 2_______1-2 (red-black) ___ 4,26 ___Cell 3_______2-3...

Thanks a lot to both of you for the Info. Here is a picture of my BMS: I think I found this exact model online, and here is the diagram for the 11-pin connector wiring (sorry, you'll have to zoom in to read it): I also purchased an Imax B6 charger, so I guess I’m about ready to start...

Hello everyone, I’m new to this great forum, so please bear with me if I ask some dumb questions. I have an ebike that I have not used for a few months and when I went to ride it, it turns out that the battery is totally discharged. It’s a 36V / 9AH li-ion bottle battery that I purchased...