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[Eco Mouse]

The bike isn't important, as it's only 2000w, 72v right now. I'm talking about upgrading it by going aftermarket. New hub motor, new controller, new BMS, new batteries... etc.

Stuff like this:
http://www.aliexpress.com/store/product/6000W-14inch-Brushless-Hub-Motor-for-electric-scooter-Electric-motorcycle/109978_1398272264.html
http://www.pingbattery.com/

Here's a pic of my bike

[Eco Mouse]

Motrac rebrands the Honda Grom. The Grom is made in Thailand.

Anyway, here's the eGrom

http://www.motracmotorcycles.com/Special/motrac-em5.php

[Richard230]

That is a nice looking bike.  Too bad it is propelled by such a low-power motor.  My son-in-law had a bicycle with a 3000 watt hub motor - which didn't work all that well on a mountain bicycle frame (and brakes). He is now running with a 300 watt hub motor and it sure is a lot easier to pedal (and stop) that bicycle when the juice runs out.   

[Eco Mouse]

Well, the bike is only $1200 delivered... so I can't complain too much. I knew going in, that it was going to need an immediate transplant. Which brings me here to this forum.

[Eco Mouse]

So, I really don't know what I'm doing here... so I took the liberty to draw up the battery pouches just to get a rough idea how much volume they are going to take up. So far it's looking pretty good size wise. Maybe I could add even more pouches depending on my size constraints.

I'm guessing that in order to get to a 96v pack, I'd need 30 cells @ 3.2v each, right?

Each pouch cell consists of 23500mAh (and takes up roughly 9 inches x 5-3/8 inches, and not even 1/2 inch thick)

So this when all connected however they are supposed to be connected, it should be 705 amps, right? According to some online calculator I should be at 67.68kW

How far can I go on all that juice?

[giacomo]

So, I really don't know what I'm doing here... so I took the liberty to draw up the battery pouches just to get a rough idea how much volume they are going to take up. So far it's looking pretty good size wise. Maybe I could add even more pouches depending on my size constraints.

I'm guessing that in order to get to a 96v pack, I'd need 30 cells @ 3.2v each, right?

Each pouch cell consists of 23500mAh (and takes up roughly 9 inches x 5-3/8 inches, and not even 1/2 inch thick)

So this when all connected however they are supposed to be connected, it should be 705 amps, right? According to some online calculator I should be at 67.68kW

How far can I go on all that juice?

unfortunately all those batteries are placed in series in order to get to 96V, so the current is not multiplied by 30, each battery will see the same current going through.

Sent from my A0001 using Tapatalk

[Eco Mouse]

My drawing isn't how they are going to be made... I'm not going to personally make the battery pack. I'm only trying to figure out how many I need and how large a space it would take up. If they have to be wired in series or parallel, or however, I'll leave that up to the battery manufacturer. I just want to tell them my power requirements.

[giacomo]

My drawing isn't how they are going to be made... I'm not going to personally make the battery pack. I'm only trying to figure out how many I need and how large a space it would take up. If they have to be wired in series or parallel, or however, I'll leave that up to the battery manufacturer. I just want to tell them my power requirements.

ok, your math is wrong then...  In order to reach 96V you need to place them in series to start, so 30 batteries in series will be 3.2Vx30x23.5A = 2,256W or 2.256KW. to increase the energy stored you need to place parallel rows of 30 batteries. So if you place 2 rows you multiply 2.256KW by 2 and so on.  To get to 65KW you need a lot of batteries....

Sent from my A0001 using Tapatalk

[Eco Mouse]

OK, good to know.

[KrazyEd]

Not an expert here as far as building from scratch, Dr. Bass would be best for that. From what I can see, there are some truth and misconceptions in most of the above posts.
Hopefully I will not ad to the misconceptions.  There are two things going on as far as connections. Series ( negative to positive, like in a flashlight MORE work done, short time ).
Parallel ( negative to negative Positive to Positive, same work done, for longer period of time ). To get battery packs you add cells together in series AND parallel to achieve
the Voltage / Amperage you seek. Here is a link to a post from MostlyBonkers from this time last year. Probably explains better than I could

http://electricmotorcycleforum.com/boards/index.php?topic=4280.0

Now, to figure out what you want to do.
A DC motor spins faster as more voltage is added, 96 Volts faster than 72, 108 faster than 96, etc.
If you have access to dozens or hundreds of these pouches, then, knock yourself out, have fun. DR. Bass seems to enjoy himself.
If not, it is probably faster and cheaper to buy an assembled pack with BMS already installed in the Voltage and Amperage that you seek.
Here is a company that has been around a few years. I have not used the product, and do not endorse, just one option to view.

http://elitepowersolutions.com/products/product_info.php?cPath=27_38&products_id=186

Consider that you will need a couple dozen cells, BMS, charger, plus your time. Compare to turn key solution.

Let the stone throwing begin.