Search found 77 matches

by energyi
Nov 02 2018 5:13pm
Forum: EBike General Discussion
Topic: E-bike Generator Challenge
Replies: 23
Views: 1906

Re: E-bike Generator Challenge

Permanent Magnet DC Generators. My hub motor regens DC.
by energyi
Nov 02 2018 2:17pm
Forum: EBike General Discussion
Topic: E-bike Generator Challenge
Replies: 23
Views: 1906

Re: E-bike Generator Challenge

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 efficient. ...
by energyi
Oct 27 2018 6:51pm
Forum: EBike General Discussion
Topic: E-bike Generator Challenge
Replies: 23
Views: 1906

Re: E-bike Generator Challenge

...it's a terribly inefficient way to transfer power from pedals to wheel. 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 op...
by energyi
Oct 27 2018 12:33pm
Forum: EBike General Discussion
Topic: E-bike Generator Challenge
Replies: 23
Views: 1906

E-bike Generator Challenge

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 in a...
by energyi
Jun 15 2018 3:03pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 334
Views: 58317

Re: Around the world on a solar ebike

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 lb traile...
by energyi
Nov 06 2017 3:46pm
Forum: EBike General Discussion
Topic: Older Headway and A123 16s Voltage differences
Replies: 2
Views: 461

Re: Older Headway and A123 16s Voltage differences

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? The...
by energyi
Nov 06 2017 2:47pm
Forum: EBike General Discussion
Topic: Anyone use fairings? Why not...?
Replies: 53
Views: 7391

Re: Anyone use fairings? Why not...?

Wrote this topic a few years ago: viewtopic.php?f=3&t=63812

Here is an explanation of my complete tailbox project:

http://renewableenergyspace.blogspot.co ... t.html?m=1

Energyi
by energyi
Nov 06 2017 10:26am
Forum: EBike General Discussion
Topic: Older Headway and A123 16s Voltage differences
Replies: 2
Views: 461

Older Headway and A123 16s Voltage differences

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. The ...
by energyi
Oct 04 2017 5:00pm
Forum: Battery Technology
Topic: Cheapest, Dumbest BMS?
Replies: 26
Views: 3080

Re: Cheapest, Dumbest BMS?

r wrote: Yes 72 cell all in series, 1.5 volts-2.7 voltage range.
Orion BMS? I pulled one out of a working Prius retrofit with more than 78s. Lots of communications.
by energyi
Oct 01 2017 8:41pm
Forum: EBike General Discussion
Topic: Speedict Ebike - Anybody seen/tried this?
Replies: 1347
Views: 185804

Re: Speedict Ebike - Anybody seen/tried this?

Very dissatisfied with Mars. Won't be getting Neptune, limiting at 15 cells.
by energyi
Sep 27 2017 6:18pm
Forum: Battery Technology
Topic: Coming Soon A123 Hymotion Modules for ES and ALL
Replies: 58
Views: 8582

Re: Coming Soon A123 Hymotion Modules for ES and ALL

Werks! As shown with ping gear.
16s11p_a123cells_w_ping.png
16s11p_a123cells_w_ping.png (264.69 KiB) Viewed 806 times
by energyi
Sep 16 2017 4:10pm
Forum: Battery Technology
Topic: Coming Soon A123 Hymotion Modules for ES and ALL
Replies: 58
Views: 8582

Re: Coming Soon A123 Hymotion Modules for ES and ALL

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.
IMG_20170916_143440106.jpg
IMG_20170916_143440106.jpg (82.85 KiB) Viewed 864 times
energyi
by energyi
Sep 15 2017 4:59pm
Forum: Battery Technology
Topic: Coming Soon A123 Hymotion Modules for ES and ALL
Replies: 58
Views: 8582

Re: Coming Soon A123 Hymotion Modules for ES and ALL

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 motor c...
by energyi
Sep 15 2017 8:21am
Forum: Battery Technology
Topic: Coming Soon A123 Hymotion Modules for ES and ALL
Replies: 58
Views: 8582

Re: Coming Soon A123 Hymotion Modules for ES and ALL

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 but chec...
by energyi
Sep 14 2017 2:21pm
Forum: Battery Technology
Topic: Coming Soon A123 Hymotion Modules for ES and ALL
Replies: 58
Views: 8582

Re: Coming Soon A123 Hymotion Modules for ES and ALL

I'm using some recycled first gen. Hymotion A123 bricks on my bike. I cut one cell out of the middle of each 11p group, making two 5p groups. I have a 10Ah 16s pack about the size of shoebox. A123 pack1.jpg Fechter: revisiting this old post because trying to figure out what to do with L5 Hymotion s...
by energyi
Aug 11 2017 10:58am
Forum: EBike General Discussion
Topic: Three Year Etrike Story
Replies: 9
Views: 1850

Re: Three Year Etrike Story

I just noticed on an older blog post that I had promised to write on Endless-sphere about solarizing my recumbent trike. So, on this blog post, I wrote about building a trailer: http://renewableenergyspace.blogspot.com/2016/06/trailer-for-e-trike.html trike trailer2.jpg Which has lead to the solariz...
by energyi
Jul 03 2016 2:23pm
Forum: EBike General Discussion
Topic: Voltage limit LiFePO4 charging
Replies: 3
Views: 597

Re: Voltage limit LiFePO4 charging

Follow up post, I did purchase the 10 amp charge controller Wincong SL03-4810A, currently less than what I paid, http://www.ebay.com/itm/10A-36V48V-60V-PWM-Solar-Controller-Charge-Regulator-100V-Max-Input-With-USB/141943518483 This can be set for stop-charging voltage, Floating charging voltage, und...
by energyi
Jun 18 2016 6:25pm
Forum: EBike General Discussion
Topic: Voltage limit LiFePO4 charging
Replies: 3
Views: 597

Re: Voltage limit LiFePO4 charging

Thanks amberwolf. If I understand this correctly, LiFePO4 BMS don't initiate a balancing procedure till fully charged. Same question then, with a higher voltage. Can a 58V voltage limiter be a successful alternative to a solar charge controller?

Best,

energyi
by energyi
Jun 18 2016 11:43am
Forum: EBike General Discussion
Topic: Voltage limit LiFePO4 charging
Replies: 3
Views: 597

Voltage limit LiFePO4 charging

Doing a recumbent e-trailer project which includes carrying some old recycled solar panels, 150 watts at 48 volts (open-circuit voltage is ~80), and want to charge my LiFePO4 20 amp-hour battery which tops out at a 58 volt limit charging. A charge controller could be used for my needs to optimize th...
by energyi
May 04 2016 2:00pm
Forum: Motor Technology
Topic: One motor on a two wheel trailer?
Replies: 10
Views: 973

Re: One motor on a two wheel trailer?

I pull the trailer, hub motor on rear wheel of recumbant trike works fine up Colorado hills even with 14.5 foot kayak and gear.
recumbant_kayak.jpg
recumbant_kayak.jpg (358.82 KiB) Viewed 802 times
More on build: http://renewableenergyspace.blogspot.co ... oseph.html

Thanks for Endlesssphere!
by energyi
May 15 2015 12:08pm
Forum: EBike General Discussion
Topic: Firstbuild, PCmag and Velomobiel
Replies: 1
Views: 421

Firstbuild, PCmag and Velomobiel

Few links which may be interesting to Endless-sphere community: Firstbuild is an on-line community of solvers where you can be paid to help; thought I saw some drift trikes already being developed: https://firstbuild.com/ And PCmag has a recent photo gallery of innovative e-transporation products: h...
by energyi
May 14 2015 10:13pm
Forum: EBike Build Threads
Topic: Catrike Expedition Touring Trike
Replies: 8
Views: 2429

Re: Catrike Expedition Touring Trike

Kirk's design was my inspiration for this story: http://www.endless-sphere.com/forums/viewtopic.php?f=3&t=63968 Thanks again Enless Sphere Community. energyi Kirk: Thanks for the great photos and description. Do you have any more details to share, how/when you purchased and hooked things up (GM ...
by energyi
May 14 2015 9:30pm
Forum: Battery Technology
Topic: Used LiFePO4 behavior
Replies: 11
Views: 2498

Re: Used LiFePO4 behavior

Just a positive update two years later, that pack is still going strong. Very happy with LiFePO4 decision.
by energyi
May 12 2015 12:01pm
Forum: EBike General Discussion
Topic: Three Year Etrike Story
Replies: 9
Views: 1850

Re: Three Year Etrike Story

Icerider: Sorry this has take so long to reply, didn't see your post notification till just now. I would agree, PV should be on a trailer. In spring we have a neighborhood garage sale and it is a great place to pick up used trailers on the cheap. As for the fire, Here is what I wrote about the fire ...
by energyi
Oct 17 2014 8:13pm
Forum: EBike General Discussion
Topic: Three Year Etrike Story
Replies: 9
Views: 1850

Re: Three Year Etrike Story

Thanks for the message. Spokes don't cross because there is no room, large diameter hub on a small wheel. Motor is the standard HS3540 with the modification on the wiring going into the hub so that there isn't wear...check the archives. Wire goes into the hub at an angle from the side and front, not...