It is always a good idea to stock up on fresh replacement batteries for your electric bike or scooter. You can find batteries, tubes, tires and a series of other generic parts standard for any bike or scooter at NYCeWheels.
I’m mostly kidding, but if you use cells that are rated for more current than you’re trying to pull from them, you’ll create a lot less waste heat and both options will be perfectly fine and healthy for the battery.
Another excellent answer, thanks so much! Now it has arisen a few related questions, if you don’t mind answering them. I’m using authentic Samsung ICR18650-26FM cells. I had already purchased a 24V 15A BMS before I slightly understood all of this. I was also able to obtain more cells since my original idea, so I was planning a 7S10P pack (around 30Ah), 70 cells total. I see each cell can do around 5A, making a 10P pack put out 50A total. If I stick with my 24V 15A BMS, that will give me 15A * 24V watts, or 360 watts total for my 500 watt motor. I’m going to number these http://electrichuntingbikes.com make it easier:
Hi, Court Rye! Thank you for your response . As I supposedly said, I do cca.20 km per day. 2000 – 3000 per year. The main road is straight, as well as highs. Just for them I need help of the engine. I send you pictures of the engine that are offered to me . They said that discourage hub motor ( in the first wheel ) , as well as the Mid – Bafang , because often corrupts !? So, what do you mean? Thanks and best regards, Miran
Note that in the article it says that LiFePo is the most commonly used chemistry. I think that depends on where you are looking. I suspect that LiNiCoMn or the older LiMn is actually most common in terms of total unit cells because they’re the cheapest and get used in the low end E-Bike market in China.
Actually, the protected cells aren’t a great option for ebike packs. The protection circuit on every cell can overcomplicate things, not to mention that it usually isn’t rated to handle the same current the cell could without a protection circuit.
The spacers you linked to make battery building a bit easier as you can set it up modularly, but as you indicated, they add a good amount of volume to the battery. I like to make my batteries as small as possible so I rarely use them. When I do, I use these ones, but it’s not very often.
E-bikes are classed according to the power that their electric motor can deliver and the control system, i.e., when and how the power from the motor is applied. Also the classification of e-bikes is complicated as much of the definition is due to legal reasons of what constitutes a bicycle and what constitutes a moped or motorcycle. As such, the classification of these e-bikes varies greatly across countries and local jurisdictions.
To develop a new hub motor would cost over $500,000 in tooling costs for a factory in China. Thats why even though there are many hub motors around for E-bikes, most are the same types or clones of existing types. Here is a list of known acceptable qualty hub motors available as of March 2012.
It’s best to try and match the cells as closely as possible based on capacity by using a lithium cell tester like this one. If you plan on using the battery you build for a high drain application, different current ratings will be more of an issue. If you have many cells in parallel and will only pull low current from each one, then different current ratings are less of an issue. It’s always best to use perfectly matched cells, though I know that’s not the cheapest option and is outside of the budget for many.
You can also add a label or other information to the outside of your pack for that professional look. If nothing else, it’s a good idea to at least write on the pack what the voltage and capacity is. Especially if you make multiple custom batteries, that will ensure you never forget what the correct charge voltage for the pack is.
Karl at electric-fatbike.com is the Bafang mid drive guru, and even though the BBSHD only maxes out at a slightly higher amperage (30A vs the 25A on the smaller BBS02), the extra copper mass in the BBSHD stator means that at 52V X 30A = 1560W of power, the BBSHD barely gets warm, because it is larger and also sheds heat better. Even if used at the same watts as the BBS02, the stator of the BBSHD is 66% wider, so it will definitely make more torque.
What makes Panasonic the benchmark in the industry for performance and reliability is an initial, consequential design decision: the middle motor. By placing the motor in the middle, the motor is able to gain the mechanical advantage of the gears on the bike, which amplifies the power of a small motor and allows it to efficiently power a rider up any hill. The placement of the motor in the middle also allows for simpler servicing—as the motor is one unit that can be easily removed—as well as keeping most of the rest of the components standard, another benefit for service.
One of the most beautiful, well balanced electric bikes I’ve ever tested, silent belt drive with internally geared eight speed Shimano Alfine hub. Modest 250 watt front hub motor (custom tuned), perfectly integrated downtube battery and new optional……
Latest BBS02 48V 750W 8Fun Bafang Mid Drive Ebike Conversion Kit BB:68mm Electric Bicycle. – BBS02 Mid-Drive Motor: 1 pc. – Power: 750W. ≤1.8 127±6 750W 112±6 ≥78% ≥60 ≤20.5 ≥120 ≥80% Kits Included. – Left Crank Right Crank: each 1 pc.
In order to improve e-bike braking,pls select disk brake. Generally φ140mm disc brake is used to be mounted on rear wheel.The thickness of this φ140mm disc brake is 2mm. Material:2cr13 stainless steel. In order to improve e-bike braking,pls select disk brake. Usually φ160 mm disc brake is used to mounted on front wheel.The thickness of this φ160mm disc brake is 2mm. Material:2cr13 stainless steel.
Some of the less expensive e-bikes used bulky lead acid batteries, whereas newer models generally used NiMH, NiCd, and/or Li-ion batteries, which offered lighter, denser capacity batteries. Performance varies; however, in general there is an increase in range and speed with the latter battery types.
A fun, classic looking electrified tricycle designed for adults, it’s easy to mount, stable to ride and very adjustable in terms of speed and power, (go from 3 mph to 14 mph or slow reverse). Includes a rubber-coated metal basket that’s perfect for storing groceries, supplies or the included charger……
Hi Craig, here’s a full comparison of the Thron with the ST2. In addition to suspension, the Thron has a better weight distribution given the mid-motor. The ST2 has more fancy smart phone technology and self-updates from the cloud (not sure if that’s online in the US right now). Both are great bikes and the price point is very similar. I’d love to hear your thoughts if you end up with one of these 🙂
Interesting… that’s a beefy looking electric bike! I haven’t heard of Falcon or tested this bike (or anything quiet like it) but the specs are impressive. Note that it’s actually not classified as an ebike due to the large motor, it would need to be 750 watts with a top speed limited to 20 mph, and this could create a liability issue if you crash and damage property or injure someone. Given your desired range, it seems like the super large battery pack would be good, it will impact weight and handling to some extent but that’s the trade, an alternative would be a mid-drive ebike with pedal assist like the Volton 350. Note that the Falcon website doesn’t have an address, just this phone number (855)-661-7337 so it feels less trustworthy than a local dealer or large company that is more willing to expose who they are and potentially offer ongoing support. Hope these thoughts help 🙂
Another thing to note is that the GNG never really had serious issues. Only people that ran custom high-wattage setups caused parts to fail. Now that the GNG is upgraded, I’d be a fool not to try it first, especially since I’m not overvolting the unit. At $336.80 it’s a steal.
hello sir. nice guide FOR battery pack li-ion… i will try an electric bike kit for my 26″ MTB. and buy 1000w hub motor kit. i can solve my battery problem (expensive you know) with li ion pack. i have some questions,