Recent content by energyi

Permanent Magnet DC Generators. My hub motor regens DC.

Great discussion, thanks for all the insights. The Mando Footloose and the Electrom are great examples of what I was requesting. Thanks. ( http://www.fullycharged.com/Mando-Footloose-IM and http://www.electrom.ca/ ) These designs will evolve and bottom bracket generators will become more...

I would have to disagree. A generator can be 97% efficient, transfer the power directly to the electric motor or store it in a battery if not immediately needed (storage has lower roundtrip efficiency). 100 watts of power optimized for the humans peddle rpm and ergonomics makes lots of sense...

Challenge your thinking some by envisioning a generator at the bottom bracket of bikes. No chain, no sprocket, no derailer, no shifters, no cassette. Only an electric motor, battery, controller (with high-efficiency regenerative braking) wires, throttle, and a generator. The E bike would evolve...

Excellent project fechter, know your pain and motivations. Would be very interested in your charge controller of choice/why, and would recommend anyone looking into doing a similar project to also consider a bifacial module, can generate electricity from both sides. My experience with a 75...

dustiNbone: Thanks for the reply. I think you are right, I have two cells that are higher voltage than the rest of the pack. Instead of removing these two, which would be difficult would it be OK if I use a 100-watt resistor on each of them to reduce the voltage while they are still in the pack...

Wrote this topic a few years ago: https://endless-sphere.com/forums/viewtopic.php?f=3&t=63812 Here is an explanation of my complete tailbox project: http://renewableenergyspace.blogspot.com/2012/11/inexpensive-lightweight-recumbent.html?m=1 Energyi

ES: Simultaneously breaking down two older LiFEPO4 plug-in-hybrid packs from higher voltage to nominal 48V's 16s configurations. I need some Endless-Sphere help in reconciling why the same charger>BMS will have different end voltages? The A123's ends at 59.4 volts and balances the cells nicely...

Orion BMS? I pulled one out of a working Prius retrofit with more than 78s. Lots of communications.

Very dissatisfied with Mars. Won't be getting Neptune, limiting at 15 cells.

Werks! As shown with ping gear.

16s11p using the salvaged electrical straps between sub-assemblies and some zip-ties. Copper wire moved from the center lug. Just have to wait on BMS shipment. energyi

Thanks again for your support Fletcher. I ordered a Ping, but am going to need more so your inexpensive suggestion is well taken. Seems to me that your homemade BMS is actually a balancing board, correct me if I'm wrong. That is probably what is needed in one of my scenarios because I have a...

Amazing, you make your own BMS. Thanks for the additional pictures. I had mapped out the cut scenario for qty-2 4s11p to 16s5p scenario leaving 8 left over cells, 56 left over cells if all 14 4s11p still have life. Your photos help confirm the cut scenario. I will probably get some ping BMS...

Fechter: revisiting this old post because trying to figure out what to do with L5 Hymotion system. Your approach seems insightful. Two questions, what BMS did or do you use for 16s scenario. And, do you just leave the one cell in place, cut out of the electrical string? Thanks again for your...