Recent content by pilotg2

Hi john61ct On consideration I'm going to continue this side project but it looks like the DIY route has headed beyond my capabilities. I'll still use my contraption to drain the odd battery for storage or something. I was going through your links earlier and was interested in this...

I thought so too lol. Strange my wife's reaction was not so warming when she discovered it on the outdoor dining table.

Ah ha, thank you for taking the time to reply in simple, understandable terms - it makes more sense now. I now know what is missing on this little adventure - keeping the load at a constant current for accuracy. I cannot test the same pack as it wears out accurately without a constant static...

Hello all I have built a DIY battery capacity tester and as i’m not electrical engineer I wanted to run a few things by you before I test my good battery packs as there are a few things I don’t understand. I’m using a watt meter to measure the current flow. The load is from oven, stove and oil...

So it definitely was the hall sensor as now the motor starts to spins from any position and ran perfectly during a ride. And the sensor works fine even though it has different behaviour to the existing two, which I didn't bother changing. During discovery and testing, the existing two sensors...

You were right, at least I think so, by my diagnosis, which could be wrong. Just like to say this forum is amazing, 2 days ago I knew nothing about Hall Sensors and now I'm attempting to replace one. One hall sensors voltage did not change when I placed a magnet over it. The other 2 went from...

Just to update, it was the BMS's that had failed across all 3 batteries. Replaced two of them and they have been working well.

I cleaned up a 8FUN front 250w geared hub motor that was badly rusted internally, I mean really badly. I'll post some pics later. After the clean up, it ran fine on the bike for a few days. After briefly stopping on a ride, I set off again and the motor was noisy and ran rough for a short while...

Hi, I have a 48v 13s5p battery pack. It had 3 bad banks which I've removed. I'm left with what is shown in the pics with all banks around 3.6v. I'd like to make 3 12v batteries which I'll run in series. To charge them I have 2 iMax B6 hobby chargers so I'm thinking of wiring up balance leads...

I'm picking up a genuine iMax B6 charger tomorrow. Having never used a hobby charger I suspect it'll be a big learning curve to get going. My plan is to balance each bank of 13 cells to 4v (as they are near this currently) by manually plugging 2 pins into the balancing port connector of each...

The two wires looped from the BMS connector, is this a single non-spliced wire? Yes it's a single looped wire from Port 15 go 16. With some manual balancing on one battery I got all cells within 3.98 and 4.04v. I then connected each BMS to this pack. Each read out roughly half the voltage of...

Thanks for the tips on the BMS. My controller is rated at 18amp and my motor is only rated at 250w. I may build another ebike with a mid motor so may get one with higher than 18amp, maybe around 25 to 30 amp. Is that OK? I'll get one BMS as my balancing charger idea doesn't sound that easy...

Thanks I thought it was weird all would be the same, but it does show how little I know hahaha. This is where I read it https://www.elecycles.com/blog/post/how-to-diagnose-the-lithium-battery-bms-damaged-or-the-battery-cells-damaged/ I see they do say within range not the same. Is that correct?

Yeah my first post was in reference to the first battery at 52.5v. The second battery has two 0.6v banks which I won't use so that one I'll be tearing apart for another project. Another reason I'm keen on an adjustable balancing charger. The third battery was at 42v. I'll try what you...

I'm now thinking i may buy a good battery charger that can balance the batteries, etc. As I have to buy 3 BMS for the battery packs and as I don't know the history of these batteries would it make sense to rather buy a good charger so I can monitor the cells from the led? I would feel more...