as mentioned here: How about 18650 Li-Ion battery pack over the Li-Po packs? - #60 by SimLoop , I was thinking to build a battery pack out of 18650 cells. Since we need 48 Volts and the maximum discharge current is around 300A, I needed batteries that support this rather high discharge current. I f…

And the other side, which shows the not-yet connected balancing wires of the BMS. still looks kind of messy, as mentioned above, I’ll need to find a way to put it all together. The tricky thing is, that I really really need to pay attention to not shorting the battery by accident. [20190119_1920…

Note that the OpenPPG now comes with two switches, and that the community has come up with an idea of how to prevent the arcing effect, when turning on the power circuit (a lot of current going from the batteries to charge the capacitors when connecting the circuit), and that is the pre-charge solut…

Great looking battery well done! Hope it works as good as it looks. Could you build a plexiglass or thick plastic box around it with vent holes? This would protect it from getting touch by any metal screw head on the paramotor frame. Then mount with industrial Velcro and strap around it to the frame…

[image] dzubot: Could you connect to the copper bus bars to power cables by tapping holes and securing the cables down with bolts? Add an eyelet crimp connector to attach the wires to the bolts. After I was done, I kind of thought about the same thing. Soldering the thick 8 AWG cables to a th…

And finally, the OpenPPG aaaaand the battery. the OpenPPG is laid flat on the floor, battery just loose on top, quickly wrapped in the stretch film to roughly protect all the contacts. [20190120_102917] [20190120_103003]

[20190120_103021] [20190120_103011]

Nice build - looking forward to seeing static test run numbers - wishing you all the best, you put a lot of effort into this and I hope it pays offs - it looks very promising. I tried building a pack from old laptop batteries some yrs ago for my E-bike. It did not work out and I no longer have the…

Thanks @E-pusher ! So after I finally wired everything up (OpenPPG as well as the Battery) I was finally able to fire Up the Battery. And it looks like as if I had scratched my head to much about the pre-charge circuit and the switches, as the BMS seems to allow me to turn on and off the Power fro…

I then charged the battery for the first time. Charging went smooth, all the way up to the max Voltage. LG HG2 cells nominal 3,6V; maximum 4,2V and minimum 2,5V with 13S this sums up to nominal 46,8V; maximum 54,6V and minimum 32,5V for the whole battery pack. So above I wrote: [image] etienn…

Did I say that the manual of the BMS is written in really bad english? I think I may have the solution, after searching the web. I found, that pretty much the same BMS is sold by other sellers as well. The layout of the circuit board looks more or less the same, also the Bluetooth App. This selle…

13S15P Battery Pack Build

Builds

etienne (Etienne) January 20, 2019, 9:59am 109

Follow up post: Case for 13S20P Li-Ion Battery Pack