I think it is much better to use a purpose built CV-CC (constant voltage, constant current) ebike charger. I 100% understand the desire to complete the project on the cheap, but I think that sometimes it is worth a few extra bucks as insurance to protect your battery which is worth many hundreds of dollars.
5. Prizes: The approximate retail value of all prizes is $1361. The prizes are: Performance E-BikeKit or Heavy Duty E-BikeKit. You are not guaranteed to win a prize and your chance of winning is dependent on the total number of eligible entries received. Actual/appraised value may differ at time of prize award. The specifics of the prize shall be solely determined by the Sponsor. No cash or other prize substitution permitted except at Sponsor’s discretion. The prize is nontransferable. Any and all prize related expenses, including without limitation any and all federal, state, and local taxes shall be the sole responsibility of the winner. No substitution of prize or transfer/assignment of prize to others or request for the cash equivalent by winners is permitted. Acceptance of prize constitutes permission for Electric Bike Technologies LLC to use winner’s name, likeness, and entry for purposes of advertising and trade without further compensation, unless prohibited by law.
^ European standard NF EN 15194 for Electrically power assisted cycles Archived 2012-12-24 at the Wayback Machine. section 188.8.131.52 Requirements: The maximum [assisted] speed [is] 25 km/h (…) During a production conformity check, the maximum speed may differ by ± 10% from the above-mentioned determined value.
The disk adapter plate is used to fix disk and be mounted on the threaded adapter of e hub motor. 12 screw holes are suit to install φ140 mm / φ160 mm disk. Material:6061 aluminium disk adapter plate Sprocket are used in bicycles motorcycles.16 / 18 / 20-gear single speed sprocket is used for motorcycle widely,but 3 / 5 / 6 / 7- multi variable speed for bike,electric bike usually. 6-multi variable speed
The single best manufacturer is BesTechPower, but their BMS’s are really expensive and they have a minimum order quantity of 2. For ‘best bang for your buck’ BMS’s I’d recommend Greentime BMS’s. They are great for most ebike applications outside of serious hotrods and speed machines. I use them on most of my packs.
This kit has also been run at 72V X 30A = 2,200W/3-HP (with a different controller), but be aware that this level of power requires a swap to a chain primary reduction, or a wider belt. Also, the GNG allows for a stronger crankset to be swapped-in for riders who like radical jumps without bending the spindle (the BBS02 crankset cannot be upgraded).
” I purchased an Electric Bicycle from Big Ed in Chicago A while ago to take with me on my private airplane for business trips. I only have to charge it about once every few weeks and it just runs GREAT!.. Everyone at the airports I visit asks me how to get one. I also take it with me in my motor home on vacation for those quick runs to the store. ”
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Hi Paul! I enjoyed reading your words and envisioned myself riding along rural streets and gravel roads with beautiful clouds and sunsets. Cycling is wonderful… but I can empathize with your desire for some assist. I got into this because of a knee injury, I wanted to keep the fun and freedom of cycling without the knee sensitivity developed over the course of longer climbs and more regular riding.
If you don’t find that, there’s still a chance that it’s the problem, and that the cells simply rose up to a higher voltage and matched the others again once the load disappeared. But it also may be that the load is too high for the BMS. Do you have a cycle analyst? You could slowly increase the throttle and watch how much current you are drawing until the point of cutoff. If it’s well below 40A then you’ll know it’s not a high current cutoff.
22f cells are quite low capacity and not very strong. They will work for an ebike (and are about the cheapest good quality cells out there) but they aren’t optimal. You’ll end up with a larger and heavier pack as compared to more energy dense cells like Panasonic 18650pf or Sanyo 18650ga cells.
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Hello Court, Great information! I survive by involving in technology then no worries understand the concepts and fixing the stuff. I have spent a good deal of my time researching e-bikes in past as well fixed some e bicycles for friends for fun. Hope you could give me a hint on hub motors with lower prices but reliable machines. This is in order to support some low income crowd in Africa. What do you think about the Chinese parts? Any recommendation?
As of August 1st, 2015, every E-BikeKit and E-TrikeKit will now include a set (8 x guides and 14 x zip ties) of Flexroute Guides and Cobra zip ties. These items are being added at no additional charge. Packs of these guides and specialty zips are also available for sale in our online shop.
China is the world’s leading manufacturer of e-bikes, with 22.2 million units produced in 2009. One of the biggest manufacturers of E-bikes in the world is Geoby. Production is concentrated in five regions, Tianjin, Zhejiang, Jiangsu, Shandong, and Shanghai. China exported 370,000 e-bikes in 2009.
at an extremely high efficiency (up to around 80%), doing more with less wattage, and thus not heating up too quickly while giving plenty of torque. In fact, in our testing of the new drive we’ve found it to be on par with a mid-drive motor system in terms of giving consistent torque on extremely steep hills. Other benefits of the Xion drive include a sophisticated control panel, regenerative brake assist, a quick release rear hub, and one of the most smooth performing torque sensors on the market.
Hi Pete! I did really enjoy the Neo line and it seemed like they sold a lot of them so hopefully there will be packs available for several years. Considering that the same pack was used on all of the different models, I feel like you should be in great shape 🙂
I have an old 12V DC Brush Motor which its consumption is around the 12A, 13 A and I built a Battery pack, with two groups of batteries, (4S6P)+(4S6P), which makes a total pack with 14,8V 30A. To make this battery pack I used 18650 Samsung Cells 2600 mAh.
Hi What is the best motor for an Recumbent Trike HP Velotechnik Scorpion FS20″? original is an GO SwossDrve Backmotor or an Front midle Motor from Shimano Steps. Both has an Problems.With longer slopes of passages the engines are hot or the battery and the electronics power no longer with, what gives it there for alternative with 25 KMh and max.350Wat?
The Netherlands has a fleet of 18 million bicycles. E-bikes have reached a market share of 10% by 2009, as e-bikes sales quadrupled from 40,000 units to 153,000 between 2006 and 2009, and the electric-powered models represented 25% of the total bicycle sales revenue in that year. By early 2010 one in every eight bicycles sold in the country is electric-powered despite the fact that on average an e-bike is three times more expensive than a regular bicycle.
A lightweight, high speed, electric road bike with sturdy 12 mm thru-axle on the front wheel, Carbon fiber fork, and Alpha 200 Gold alloy frame to dampen vibration. Capable and comfortable on hard packed trails as a gravel grinder, sturdy Aluminum fenders and……
40% grade hills? That’s huge! You’ll definitely want a cell that can perform at high current since you’ll be pulling peak power from those cells to get up those big hills. Something like the Samsung 25R would be a good choice for this application.
When it comes to choosing a BMS, the number of cells you have in parallel aren’t important. Only the number of series cells matters. The same BMS will work with 1 or 100 cells in parallel, as the voltage stays the same regardless of the number of parallel cells.
If you want to go 50mph and have a 500 or 1,000-watt monster motor on your electric bike you’ll need big expensive, heavy batteries, and you might as well buy a motor scooter or motorcycle. If you wan…
I’m wondering, what do you do for 6V or 12V applications where the correct number of in-series cells is ambiguous? For example, if I’m replacing a 6V SLA battery, it seems like the existing charging system would set a 1s battery on fire, but wouldn’t be sufficient to charge a 2s battery. Are there BMS’s that have VRs to step up the voltage from the charging system to the battery, and step down voltage from the battery to the charging system to facilitate a 2s battery for the application?
So I’m going to first use a wider (285 mm to be exact) but shorter piece of shrink wrap to go around the long direction of the pack. That will seal the ends first, and then I can go back with my long and skinny piece of heat shrink to do the length of the pack.
Lay your nickel strip on top of the three cells, ensuring that it covers all three terminals. Turn your welder on and adjust the current to a fairly low setting (if it’s your first time using the welder). Perform a test weld by placing the battery cells and copper strip below the probes and lifting up until the welding arms raise high enough to initiate the weld.
However, the description says The monolithic 12V batteries do not have any PCM (any electronics) inside. They consist of finely balanced cells with identical perfomace. The battery must be managed as a single monolithic 12V block.
What a great article! It has opened my eyes to lots of possibilities. Being new to this I had a couple of questions. I am interested in building a spare battery to give me more range on the Faraday Porteur. My question is how to connect the battery I would build to the bike. The main battery resides in the downtube and the connection is hidden. They offer an ancillary battery that plugs into the charging port which is what I would like to build myself rather than buy. Do you think this would be possible? Where could I find a connector that would match? Any concerns? If so, what other options do you suggest? Thanks so much for the help!!
A BMS isn’t necessarily strictly required – it is possible to use the pack as is, without a BMS. But that requires very careful monitoring of the cells of the battery to avoid damaging them or creating a dangerous scenario during charging or discharging. It also requires buying a more complicated and expensive charger that can balance all of the cells individually. It’s much better to go with a BMS unless you have specific reasons to want to monitor your cells by yourself.
Most of the problems occur when charging an ebike because they are unsupervised and that is when a LiPo fire can burn down a house etc. Use common sense on where you are going to charge your bike or battery pack, so that if it does burst into flames it does not take your house with you. I have a big steel barbecue grill set up in my entryway which I charge my battery packs in as nice safeguard. This involved taking the battery pack out of the bike after each ride but I am OK with that: