Recent content by Graham123

I think my confusion is starting to dissipate. For years I've been trying to figure out how ebike batteries typically balance, always running into 2 conflicting ideas - one states that balancing occurs only after charging is cut off by HVC- you guys seem to say this is the case. The other says...

Interesting, thanks. Sorry to keep on going with this -feel free get on with your life- but I just don't completely get the intent of the per cell HVC. So if any cell reaches above that, the whole charging cuts? That doesn't seem to allow any out of balance high cells to surpass a threshold...

Maybe it's a whole pack HVC, not per cell? Otherwise, how would balancing ever occur? (unless they set a shunting threshold below 3.4)

Thank you for that. It reminds me - one interesting thing I'm noticing is that there is no settling going on after charging. The pack remains exactly at where it cut off - 27.1v, for 6 hours now (ill check again tomorrow). If a high group went over the limit, I'd expect to see the overall...

You're right, it could be a low cell group. But wouldn't slow charging help to balance it regardless? Unless the BMS doesn't do balancing - but there definitely is a BMS, I know that much, and it's rare to find one that doesn't at least to passive balancing.

Hey all, a while ago I got a new 24v 10ah LifePo4 battery from Golden Motor. I was surprised to find when charging it, the charging cut off abruptly at 27.1v. Other LifePo4s I have usually charge to 3.65v per cell, which means this battery should charge to 29.2v (which is also the output of the...

Hey folks, strange technical question: Is it possible to use 2 motor controllers for one ebike hub motor? Not at the same time. See, the only controllers available for my motor come in 2 flavors - peddle assist only and throttle only. How annoying... Can I just get both, wire the 3 phase wires...

Great BMS. Possibly a little bulky to have on a bike. However, to use this, would I have to build my own battery or work with a custom manufacturer? Or could I somehow replace the BMS of a commercial pack without disassembling the whole battery? It sounds like the charge contactor is the most...

Hello. I'm buying a new battery for my ebike, and I want to experiment with charging it via a small (100-200w) solar panel (while I'm riding). The Genasun GVB-8, or less expensive boost MPPTs, claim to be able to boost the voltage from a small panel to charge a typical ebike battery. I am aware...

Thanks for that info. I guess its simply a matter of having the throttle on low to limit wattage while solar harvesting. If you can maintain a decent speed and charge the battery as well, you can draw that power in the evening and next morning and repeat. just read of a traveler who went 7500...

Ive seen a lot of people mounting solar panels above their recumbant bikes. It seems to work for extending range, but ultimately the power harvested is only a small fraction of whats necessary to run these powerful 48v 1000 watts+ motors. Why not use a smaller motor, say a 250w hub, and charge...

I really enjoy my low profile 24v hub. However, its time to upgrade my battery. The hub may die soon too.. got 3000+ miles on it. Is there a way I can get a more modern 48v battery and still use my 24v motor for now? Maybe upgrade to a 48v hub later? would something like this work...