Choose an electric bike from top brands like Razor, Monster Moto and Jetson, and your child will be burning rubber in no time! In sporty colors like yellow, green and red, your little rider can cruise in style at speeds of up to 15 mph. Adventures can usually last up to 40 minutes, or 10 miles, on a single battery charge. To ensure you get the right bike for your child, carefully examine the age and weight restrictions of your new electric bike.
China has experienced an explosive growth of sales of non-assisted e-bikes including scooter type, with annual sales jumping from 56,000 units in 1998 to over 21 million in 2008, and reaching an estimated fleet of 120 million e-bikes in early 2010. This boom was triggered by Chinese local governments’ efforts to restrict motorcycles in city centers to avoid traffic disruption and accidents. By late 2009 motorcycles are banned or restricted in over ninety major Chinese cities. Users began replacing traditional bicycles and motorcycles and e-bike became an alternative to commuting by car. Nevertheless, road safety concerns continue as around 2,500 e-bike related deaths were registered in 2007. By late 2009 ten cities had also banned or imposed restrictions on e-bikes on the same grounds as motorcycles. Among these cities were Guangzhou, Shenzhen, Changsha, Foshan, Changzhou, and Dongguang.
As the weather begins to drop and the snow starts to fall, it is increasingly important to know how to properly care for your electric bike and its Lithium-ion battery. It may be possible for some people to ride their bikes during the winter months, while others must pack them away until the warmer weather returns. Whether you plan to ride in the cold and snow or if you decide to…
Hi I need help! I am building my own battery pack from old laptop batteries (18650’s). I bought the cheep $250 48v 1000w ebike conversion kit on ebay. I have many questions! It seems the perfect number of cells to connect in series are 13! This is a big problem for me because I am cheep and I already bought the Imax B6 battery balancer charger. I also bought 7x 6s balancer leads and 5x 4s leads. The Imax has a max charge voltage of 22.2v (so it sais in the manual), and a max balance of 6 cells at once. I also bought the parallel balance charging board. I don’t want to charge two or three packs at once to just have to turn around and charge one separately. So now I’m faced with the decision of making a 12 series battery or a 15 series battery (I will buy 5s leads in this case). The problem is with the 12 series battery the nominal voltage is only 43.2. Or a 15 series battery with a nominal voltage of 54. Which I’m pretty sure is a big no no because the controller is only meant to handle 48v within reason (13s max charge voltage of 53.3 and 12s 49.2 at 4.1 v per cell). But if I make it a 12s, running around most of the trip at 44v, will this drain the Amps faster because the motor wants 48v? I’m thinking no but just wanted some confirmation on that and if the controller can handle more volts. I could make a 15 series batter and just charge to 3.6 or 3.7 volts. Is this hard on the cells?
In some cases a front mounted hub motor is preferred because it allows an internally geared hub or continuously variable transmission CVT hub such as the NuVinci to be used in the rear. Some of the newest electric bikes like the Smart ebike combine an internally geared hub (that the cyclist pedals) with a hub motor and are able to put both in the rear wheel.
I love this article and I am inspired by the knowledge here, I have a question, I need to build a 72v battery and the one I’m looking at is using 38160 cells, these cells are very expensive so how can I manage this the best using the smaller normal size cells like you’re using! Do I really have to make a battery 20 cells deep to reach this and to bump up the amp hours I would let say go 10 wide for a 30 amp hour right? Pretty close! Big battery but is it feasible or is there a better product
With today’s ever changing economic climate, it’s nice to have a reliable vehicle that doesn’t cost much to operate. The electric bicycle fits that niche very easily. Electric bicycles operate for many miles on a single battery charge, making them a good choice for anyone trying to save money on increasingly more expensive gasoline. The electric bike has been on the scene for many years, making electric bike parts easy and cheap to obtain.
If you want to test cells from different vendors, the best thing to do is run them through a discharger, preferably a fancy graphing one, and preferably at a high current rating close to the maximum discharge rating. Fake cells are lower quality and won’t be able to provide the same capacity, and will have a larger voltage sag under higher loads.
Written by Gaston Daigle. Gaston is an admin and key contributor at the popular Endless Sphere Technology Forum Batteries and battery packs, the lifeblood of your electric bicycle Plug and play?… not always that easy and certainly not very simple for most of us.. or is it? A good Lithium battery pack can cost as much, and often even more than the rest of your electric bike kit. Picking the right…
Today, China is the world’s leading producer of e-bikes. According to the data of the China Bicycle Association, a government-chartered industry group, in 2004 China’s manufacturers sold 7.5 million e-bikes nationwide, which was almost twice the year 2003 sales; domestic sales reached 10 million in 2005, and 16 to 18 million in 2006.
Sure, it is possible to solder directly to the cells (though it can be tricky without the right tools). The problem with soldering is that you add a lot of heat to the cell and it doesn’t dissipate very quickly. This speeds up a chemical reaction in the cell which robs the cell of its performance. The result is a cell that delivers less capacity and dies an earlier life.
Addresses in the following State Codes AK, HI, AE, AP, AA, PR, GU, MP, PW, AS, VI, FM and APO/FPO addresses with U.S. ZIP Codes will ship for free with value shipping. You will see this noted in checkout.
The Stromer ST2 uses an exclusive hub motor developed by TDCM for Stromer that is being marketed as “Syno-Drive.” The Syno-Drive hub motor has a number of design changes that make it perform better, weigh less, and run smoother than any other drive system we’ve tried.
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.
E-bikes use rechargeable batteries, electric motors and some form of control. Battery systems in use include sealed lead-acid (SLA), nickel-cadmium (NiCad), nickel-metal hydride (NiMH) or lithium-ion polymer (Li-ion). Batteries vary according to the voltage, total charge capacity (amp hours), weight, the number of charging cycles before performance degrades, and ability to handle over-voltage charging conditions. The energy costs of operating e-bikes are small, but there can be considerable battery replacement costs. The lifespan of a battery pack varies depending on the type of usage. Shallow discharge/recharge cycles will help extend the overall battery life.
1000 Watt – 36V Controller. 1000 Watt – 36V Brushed Motor Controller Don’t try and guess what goes where like others listed, we clearly state whats what. We can also set it up to plug right into what …
I just have a simple question: I would like to replace the Nicad battery 24V / 5Ah of my old Yamaha PAS XPC26 with a 7s3p and maybe try a 8s3p for something more “punchy” (hoping the controller will not burn …) . Do you think I can buy a 10s BMS and use it with a 7s or 8s battery? In this case, what should I do with the spare balance wires ?
Hi Jose, sorry to hear about dogs and strangers making you feel insecure on your bike :/ the most drag-free system I’ve reviewed so far is the Add-E because it doesn’t even touch your rear wheel when pedaling and it’s super light weight too. The only downside is that it’s not very powerful… It would still assist you well though and the 600 watt version can go over 20 mph if you pedal along and then keep you there more easily. The basic 250 watt system cuts out at 15.5 mph to comply with European laws but also costs less.
I just found your article, and as if it were destiny, this is exactly what I am trying to do (build a battery pack with BMS, and charge with charger). I am new to this, however, and have a question or two…
Hi David, I sure hope so! The last time I visited the Focus/Kalkhoff offices in Southern California they said that more models were on the way. I plan to go back and do more updates and videos at some point but am currently traveling in Texas (lots of rain and wind in Dallas right now!) keep an eye out and I’ll post the review once it is shot 🙂
Over the years our lineup has grown, and as a result, the offering has become more complicated than it needs to be. Specifically, this year we introduced a 500w geared motor option to the lineup and that has created some redundancy. Before outlining changes, we would like to ensure everyone that we will be stocking enough inventory of previously sold parts for a long enough time to ensure all warranties…
Electric self-balancing unicycles do not conform to e-bike legislation in most countries and therefore cannot be used on the road, but can be utilized in the sidewalk. They are the cheapest electric cycles and used by the last mile commuters, for urban use and to be combined with public transport, including buses.
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.
Now you’ve got all the info you should need to make your own electric bicycle lithium battery pack. You might still need a few tools, but at least you’ve got the knowledge. Remember to take it slow, plan everything out in advance and enjoy the project. And don’t forget your safety gear!
At the same time though, think about if that is what you want. It could be that those cells died because of a malfunctioning BMS unit or old wiring. Putting new cells in their spots could just wind up killing those new cells in a few days or weeks. I’ve seen that happen as well. So make sure you check everything and consider all of your options!
Introduced in the summer of 2014 by the company Sachsen, the large diameter of this kit is to make up for the lack of internal gears that other similar kits use. It provides 250W, and due to being direct drive, it should likely be very quiet. Thanks to ES member Miles (from the UK) for the link.
Hub motors come in two different types including geared (usually a planetary design) and direct drive or gearless (relying on larger magnets and no gears). Gears provide leverage, enabling smaller and lighter weight motors to achieve greater output but also produce friction, noise and wear. Most modern geared hub motors are built very well and should last for many years so don’t get too spooked. It may seem counter intuitive but geared hub motors do not add resistance when coasting. This is because they usually contain a freewheel mechanism that can unlatch from the axle and spin with little to no friction.
Your method of using the tubes might work but I still worry about how much current you could safely pull out of those connections. You can definitely charge the way you described but trust me, charging 2 or 4 cells at a time gets VERY frustrating. You’ll be spending days, maybe a week, getting your battery all the way charged again.
2x Motor Gear Box 12V For Kids Ride On Car BMW Audi TT Hummer Land Rover Jeep. This pair of gear box is suitable for 12V Ride on Hummer, TT, BMW, Mini, Jeep and Land Rover etc. Sub-Type:Battery/ Electric.
In 2012, two e-bike advocates completed the first 4,000-mile (6,400 km) transcontinental e-bike tour from New York to San Francisco to advocate for e-bikes in major cities across the U.S. Pedego Electric Bikes is the best selling brand in the U.S. Many e-bikes in the United States are standard bicycles converted using a kit. In general, the kits include the motor (the majority of which are hub motors built into the front or rear wheel), a speed controller, throttle (usually twist-grip or thumb throttle), necessary wiring and connectors, and a battery. Several U.S. companies offer conversion kits which also offer advanced lithium battery packs. Major manufacturers also offer complete e-bikes. Trek offers a line of e-bikes using the Bionx system in which the rider programs the controller to determine how much effort the motor will give in response to rider effort, from 25% up to 200% of the rider’s power. This system ensures a minimum level of http://huntneqip.com participation and is also used to comply with many European laws mandating partial human effort before the motor engages.