Troutwrestler
Member
Is the battery and BMS totally encased in the epoxy? As in submerged in liquid epoxy and allowed to set?
Good job...Some update on my extender project ...
Finished and tested.
works fine.
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the battery pack and the BMS are moulded in black epoxy which needed some more sanding afterwards
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the battery holder and cable coming out of 1 of the bottle holder wholes.
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Extender installed and ready to roll … 504 + 432 = 936 Wh
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Nice job !
Excuse my bad english for this explanation. You need to imagine 2 water bucket as your batteries. One bigger than the other, just like your two batteries.
When during your biking, the bike will pull some energy (water in your bucket), and it will always keep the water level identical in the two bucket.
So it will pull from both, but a bit more in the bigger one as the level descrease slower than in the smaller one.
so for replying to your questions. As long as you extender as the same or higher voltage than the main batterie, your pull some energy from it.
2nd. no you shouldnt. because the "software" is in the main battery, once this one is empty, the motor will be shutted down even if your extender is full… knowing that you should use the extender from the beginning.
3nd, I don't really understand your question, but to clarify, if one battery is more charged than the other, the motor will pull it's energy in the most charged one, as long as it's voltage is higher than the other one. Once the voltage reach the same value of the second battery, then both batteries provide energy in same time.
hope it's clear
Hi Cascomaterial:
1 x 252wh Bottle 205.00 €
2 x 50A ideal diode 39.00 € Warranty: 3 years
Hi, very interesting and challenging topic.
When I read the web sites of Levorex or Levo Range Extender they precised that devices are connected by a plug and ride system composed of Ideal diodes and realized with the MOSFET technology. What’s is MOSFET Technology?
In the same way the electonic schemes proposed in this forum seams quite different for a non technician i.e. the first one in this topic (page1) , and the last one just above (page3).
Thank's for your help.
Hi Casco
This is very good info - Can You post links to the sites, where You got the bottle and diodes
Thanks’ Casco for this hopeful precision.
Next. I found in this topic two types of connections . See jpg attached.
Are there equivalent?
Thanks
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Hi Casco,
One question more!
External battery exists in 2 models : 36V 7Ah or 36v 10,5Ah . I suppose that's the second one deliver more power.
But is it OK for Levo?
Thank's.
John
Hi ,Hello
are the same thing, I opted for scheme A. GND has no direction, so you don't need to go to the diode ...
Thank-you . Have a good day
Hi ,
Concerning this point I asked re-voltage.eu that solIdeal Diode ID80V3 module (cf above) . They said that you have also to connect the GND on the Ideal Diodes to the negative supply. This is needed to power the internal control circuit. If you don't then they will only work as ordinary diodes and will get hot.
Yours
Hiok, so yesterday I printed 10 tube of 21,5*72mm. So a bit larger than some 21700 Li-ion cells.
So here are my 10 cells
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I can insert a first batch of 4 cells at the deeper. so they are just behind the steering column (is that the right word ? sorry for my english btw…) View attachment 19867
and then, two batch of 3 cells. I couldn't make a batch of 6 because the cells have to pass over the hole for fixing the main battery.
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and finally this white thing is a block a bit larger than the BMS I am planning to use. If fit here well and there's still room everywhere for adding wires, and very important for adding rubber and foam for absorbing shocks and vibrations.
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Concerning the Ideal diodes, they go near the motor.
Well, I am not yet sure of the final installation of the cells, but because they fit with a bit of margin, I'll order the stuff and go for these LG INR21700-M50T 5000mAh.
hi i about to get battery how do u splice the power cord do u have a diagram ?I did it. And it’s work.
Additional precision concerns the electrical conductor: flexible 14 AWG copper wire
Many thanks for the help !
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There is no Ideal-Diode (Mosfet) without GND. Here is the GND at the 50A-model:it may be true ... but then why is there an ideal Diode Mosfet without GND?
yes bike works fine without the extender . i don't have the means to built a battery pack or order one online as they won't send to my location so.. this is the only way to get one .this not a business venture this is for my personal use .ROTFL, they don't know what are they doing. Of course there is a missing part. But why we have to teach a LBS how to do it?
In my opinion this forum is for DIY hobbyist and help each other for free, if some one like LBS want to do a business with DIY-Extender is better if they study how it works. IMHO
Let me guess, your bike works well without the extender?
Yes I know what is the problem and how to fix it. Sorry if I'm not polite.
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