Hi, I wanted to build an electric car but I know too little about them so I decided to start with an E-Bike.
The project has begin. As said in Endless forums I will be using my new bike.
The concept is to build a bike that looks completely stock or unmotorised.
but actially having it going 50km/h or faster. Having a backpack filled with batteries.
I will add this rear brushless motor wheel
with hidden wiring in the frame
getting power from 4 of these 10s 5AH Lithium polymer
Safely wraped in Lipo sack than secured in a styrofoam thin block
to finaly insert the styrofoam in this thin backpack
Well kinda. I want a stealth setup and this backpack you can wear a coat over it.
Over here the rules are maximum of 32kph I want a conversion that no one will notice that it is electric.
Also I cant wait to see the faces of those running 49cc scooters when I follow them on a "normal" pedal bike
One more thing that makes my backpack interesting is that I will use it for other applications such as my lawn mower, hedge trimmer, blower, and weedwacker.
Maybe some has other ideas of what to do with my backpack
I will have 6 batteries of 37v 5AH
Which makes a battery pack of 1,963,636,364 cells (6s327,272,728p).
I don't think you'll be powering a real Iron-Man suit.
Oh, and amusingly, 3GJ is about equivalent to the chemical energy in half a barrel of oil.
Moving on. 74V 15Ah would give 3,996KW of stored energy (74 * 15 * 3600). Assuming 400W for an e-bike (Travelling at 40Km/h), that gives a range of 9,990 seconds, or 2.775 hours (111Km) of travelling time.
That's a very healthy number, and I think there may be something wrong with my math, as it sounds suspiciously too good to be true. On second looks though, it might just be right:
Which makes a battery pack of 1,963,636,364 cells (6s327,272,728p).
I don't think you'll be powering a real Iron-Man suit.
Oh, and amusingly, 3GJ is about equivalent to the chemical energy in half a barrel of oil.
Moving on. 74V 15Ah would give 3,996KW of stored energy (74 * 15 * 3600). Assuming 400W for an e-bike (Travelling at 40Km/h), that gives a range of 9,990 seconds, or 2.775 hours (111Km) of travelling time.
That's a very healthy number, and I think there may be something wrong with my math, as it sounds suspiciously too good to be true. On second looks though, it might just be right:
Well kinda. I want a stealth setup and this backpack you can wear a coat over it.
Over here the rules are maximum of 32kph I want a conversion that no one will notice that it is electric.
Also I cant wait to see the faces of those running 49cc scooters when I follow them on a "normal" pedal bike
One more thing that makes my backpack interesting is that I will use it for other applications such as my lawn mower, hedge trimmer, blower, and weedwacker.
Maybe some has other ideas of what to do with my backpack
I will have 6 batteries of 37v 5AH
Stealth EV! I like it.
I also like the idea of the battery pack being used for other things.
I have thought of making a battery pack on a belt for working at height with big battery tools. Same power but less weight in one hand while hanging onto the ladder.
I may have to buy into your battery back pack idea.
Where did that 20WH figure come from? it is very strange to measure power used (an instantaneous measure) in timed increments. Akin to saying "This bath is 20 cups an hour full".
To maintain nice speeds over 30 kph while going uphill requires on the order of 400-500 watts or more. On the flat, 400 watts (about 1/2 horsepower) will move a typical bicycle about 40 km/hr.
Which makes a battery pack of 1,963,636,364 cells (6s327,272,728p).
I don't think you'll be powering a real Iron-Man suit.
Oh, and amusingly, 3GJ is about equivalent to the chemical energy in half a barrel of oil.
Moving on. 74V 15Ah would give 3,996KW of stored energy (74 * 15 * 3600). Assuming 400W for an e-bike (Travelling at 40Km/h), that gives a range of 9,990 seconds, or 2.775 hours (111Km) of travelling time.
That's a very healthy number, and I think there may be something wrong with my math, as it sounds suspiciously too good to be true. On second looks though, it might just be right:
Stealth EV! I like it.
I also like the idea of the battery pack being used for other things.
I have thought of making a battery pack on a belt for working at height with big battery tools. Same power but less weight in one hand while hanging onto the ladder.
I may have to buy into your battery back pack idea.
Woodsmith, I am really active on another forum "endless-sphere.com"
and I got to say you are the only one that likes the back pack idea...
Most say it's too dangerous or really really stupid. For me, it's inovative and fits my lifestyle. It will be really safe with all the precaution I will be taking.
In the R/C industry we are all recommended to use LIPO sac when charging or storing LIPO batteries. Lipo sac are fire safe and they are made from fiberglass cloth. In other words, I will secure every batteries in in that cloth and at the end I will place the styrofoam in that cloth with a thin aluminum sheet securing my back. I dont think it will be that dangerous
BTW: The new Hybrid hyundai sonata has LIPO batteries lol
Well, when I first saw your back pack I did wonder about the safety aspects. Then I figured that you would have suitable fusing to prevent fault overload when in use and you wouldn't be silly enough to charge it while you are wearing it.
Other then that, I am sure that there are some risks involved but I am also sure that you can ask/get information on what may cause the risk level to rise and make an informed judgement on what precautions you may need to take.
Alternatively I could just be really, really ignorant of the risks involved.
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