Obiwan007
1 kW
Hi to all,
I feel like in some ways I know many of you from lurking and learning for some time now. Let me start by saying thanks so much for all of the amazing information and for inspiring in me the desire to begin a build of my own. By way of introduction, he is my story. I was bitten by the e-bike bug when I found a really nice (tame) e-moto at a garage sale for cheap. I have ridden almost every day since. I have now gotten two more (tame) beach cruiser bikes and now go on tame rides with my wife and kids. Now,..I'm done with tame. You on ES have inspired me to do something more. So this is my goal: I am building a full suspension, electrified, fat bike. I envision a sort of "jeep" of the e-bike world. We often vacation where there is either sand or snow and I thought it would be really unique to combine the capability of e-biking in those environments with our normal road e-biking that my wife and I do together now. Plus I'm a sucker for trying something no one else has managed yet (or at least few). That said I began with an arbitrary goal of an e-bike that was capable of 30 mph on the flat roadway with 25 miles of range. I also decided to build this first project on an unmodified stock frame and get as close to the fat tire feel as I could without modifications. Thinking that this would be a learning project that could become a hand-me down bike to the wife when I do a second build with true fat tires (again, arbitrarily, I define that as 3.5 inches wide or greater). So I began to read and research incessantly on the sphere and elsewhere. I began actively gathering resources a month ago when, after looking at many donor bikes, I bought a really great Kona manomano DS bike with lots of the features I thought I should be looking for. Since then I have gotten a motor, decided on a really unique wheel build design, acquired all the parts for that and sent them off to JRH the wheel man for custom assembly, and purchased a Lyen controller. So, well on my way. While the mechanical stuff is being readied, I am now turning to the electrical end. One of the parameters i really wanted to stay within is to put all or most of my batteries in or below the triangle. After lots of research and reading, I plan to use a system that has a form factor that allows that but is also open-ended for expansion. Thus I plan to go, initially with 4 of the 6s 1p 8000maH lipos from HK if they ever go off backorder. If I have this right, I will hook them up in a 12s2p configuration for 44.4V and 16aH. These four batts will fit either in the triangle or below the down tube. If I later want to up the power on this bike I would feel pretty comfortable putting two more on a seat post rack for 18s2p and would then only have about an extra 6 or 7 lbs above or at the level of the top tube. Looking back, I see I have really gone on a bit. At this point I don,t feel like I have the charging process completely figured out yet and I am just now formulating a wiring diagram in my head. I do plan to us a CA on this bike and I would like to wire it in a fashion that would allow on-board charging except for when I do a full balance/maintenance charge. Now please feel free to poke holes wherever you think necessary. I really do want the advice and realize that I still have much to learn. I have a long history of various types of fabrication in many types of media and have an excellently equipped shop that includes a machinist’s mill and lathe. Also, a well equipped wood shop with many tools that I have built myself including a 2” X 72” Belt grinder (I love that thing). I guess what I am saying is that I am not completely unskilled nor under equipped. So I hope that I am well suited to take a ride down the slippery slope of EV biking. So let this be my introduction and the beginning of a thread on my build.
I feel like in some ways I know many of you from lurking and learning for some time now. Let me start by saying thanks so much for all of the amazing information and for inspiring in me the desire to begin a build of my own. By way of introduction, he is my story. I was bitten by the e-bike bug when I found a really nice (tame) e-moto at a garage sale for cheap. I have ridden almost every day since. I have now gotten two more (tame) beach cruiser bikes and now go on tame rides with my wife and kids. Now,..I'm done with tame. You on ES have inspired me to do something more. So this is my goal: I am building a full suspension, electrified, fat bike. I envision a sort of "jeep" of the e-bike world. We often vacation where there is either sand or snow and I thought it would be really unique to combine the capability of e-biking in those environments with our normal road e-biking that my wife and I do together now. Plus I'm a sucker for trying something no one else has managed yet (or at least few). That said I began with an arbitrary goal of an e-bike that was capable of 30 mph on the flat roadway with 25 miles of range. I also decided to build this first project on an unmodified stock frame and get as close to the fat tire feel as I could without modifications. Thinking that this would be a learning project that could become a hand-me down bike to the wife when I do a second build with true fat tires (again, arbitrarily, I define that as 3.5 inches wide or greater). So I began to read and research incessantly on the sphere and elsewhere. I began actively gathering resources a month ago when, after looking at many donor bikes, I bought a really great Kona manomano DS bike with lots of the features I thought I should be looking for. Since then I have gotten a motor, decided on a really unique wheel build design, acquired all the parts for that and sent them off to JRH the wheel man for custom assembly, and purchased a Lyen controller. So, well on my way. While the mechanical stuff is being readied, I am now turning to the electrical end. One of the parameters i really wanted to stay within is to put all or most of my batteries in or below the triangle. After lots of research and reading, I plan to use a system that has a form factor that allows that but is also open-ended for expansion. Thus I plan to go, initially with 4 of the 6s 1p 8000maH lipos from HK if they ever go off backorder. If I have this right, I will hook them up in a 12s2p configuration for 44.4V and 16aH. These four batts will fit either in the triangle or below the down tube. If I later want to up the power on this bike I would feel pretty comfortable putting two more on a seat post rack for 18s2p and would then only have about an extra 6 or 7 lbs above or at the level of the top tube. Looking back, I see I have really gone on a bit. At this point I don,t feel like I have the charging process completely figured out yet and I am just now formulating a wiring diagram in my head. I do plan to us a CA on this bike and I would like to wire it in a fashion that would allow on-board charging except for when I do a full balance/maintenance charge. Now please feel free to poke holes wherever you think necessary. I really do want the advice and realize that I still have much to learn. I have a long history of various types of fabrication in many types of media and have an excellently equipped shop that includes a machinist’s mill and lathe. Also, a well equipped wood shop with many tools that I have built myself including a 2” X 72” Belt grinder (I love that thing). I guess what I am saying is that I am not completely unskilled nor under equipped. So I hope that I am well suited to take a ride down the slippery slope of EV biking. So let this be my introduction and the beginning of a thread on my build.