Upgrade to Lithium and controller overvolting

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Thu, 04/12/2012 - 02:37

ccriss

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Hi to all, I would like to add to the list of Sla to Lithium conversion my e-scooter.
It’s a scooter “low cost” similar to a XM-2000, it was a 2000W 48V 38AH, after several steps now it’s a 60V 40AH(20cells LIFEPO4 ).

Before the conversion speed was around 55KM/h (34Mi/h) now the max speed is 68Km/h (42 MI/h)

The range is really increased, it changes from a range of 50KM with a new pack of SLA at 45Km/h
to a range of 70KM with a the lithium battery.

Here you can find some picture related to the first step conversion to 16 cells (later I added 4 more cells)
scooter+batt.JPG

foto con bms.JPG

Here a video where you can see the “awful” performance with 20cells;-)

Here my blog where I wrote with more detail what has been done to upgrade the scooter, unfortunately it's in Italian, but google translator can do the miracle!

Thu, 04/12/2012 - 02:47

ccriss

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Re: Upgrade to Lithium and controller overvolting

Sorry, I probably missunderstand how the links works:-( , please find the correct link below

Here a video where you can see the “awful” performance with 20cells;-)
http://www.youtube.com/watch?v=MIwsRz7vUOU" title="Performance-Video

Here my blog where I wrote with more detail what has been done to upgrade the scooter, unfortunately it's in Italian, but google translator can do the miracle!
http://ccriss7z.wordpress.com/category/scooter/upgrade-scooter/

If you are interested the blog contains also a DIY Cycle Analist realized using Arduino, I'm proud of it!!

Bye

Sat, 04/21/2012 - 04:59

ccriss

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Re: Upgrade to Lithium and controller overvolting

To have a better description on how Arduino has been implemented in my scooter please find that video
http://www.youtube.com/watch?v=7okQdwo2jWk
The language is Italian, but images can often describe better than 1000 words :-)

Maybe later on I'll post the same but in English

Bye

Tue, 05/22/2012 - 02:11

ccriss

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Re: Upgrade to Lithium and controller overvolting

And the project go on, below you'll find some news regarding the new development...

In these days I started to test the first draft version of ArduScooter 2.0.
This DIY project has these goals:
- Connect Arduino to an Android phone using bluetooth
- Receive data from Arduino to my Android phone to be stored on disk
- Display in real time data coming from Arduino sensor..

It's nice and it seem to be working!!

The big issue was to implement the connection between the two system..

Here are two demonstrative video

http://www.youtube.com/watch?v=sVpIOvw5HWM

http://www.youtube.com/watch?v=uZyD4m0R_YU

And the blog contains some further info (unfortunately still in Italian)
http://eco-mobilita.blogspot.it/search/label/Android

Bye

Tue, 05/22/2012 - 07:56

Heman B.

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Re: Upgrade to Lithium and controller overvolting

ccriss wrote:

Before the conversion speed was around 55KM/h (34Mi/h) now the max speed is 68Km/h (42 MI/h)

Your video shows only 61,8kmh, not 68!

Either way, you can about say you get 1km/volt there.

Tue, 05/22/2012 - 08:22

ccriss

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Re: Upgrade to Lithium and controller overvolting

Maybe you get the wrong video:-)
If you refer to this one http://www.youtube.com/watch?v=MIwsRz7vUOU (the first video posted), you will clearly see (look at the picture below) the spedometer is over his limits which is 40Mi/h.

MaxSpeedreached with 20cells.JPG

Sat, 05/26/2012 - 21:10

Heman B.

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Re: Upgrade to Lithium and controller overvolting

I'm sorry,
I mistook the voltage meter for a speedometer.

Yes indeed. Have you managed to get similar speeds without overvolting on a bike?
If yes, what kind of engine was necessary?

Mon, 05/28/2012 - 06:35

ccriss

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Re: Upgrade to Lithium and controller overvolting

Don't worry, in effect it can be confusing, I have too many instruments!! :-) Yes, the 61,8 is the voltage meter..
The speed is a mix of features, just to simplify to reach 70Km/h you need at least 2500W (there are a lot of variable that change this for example weight, cx etc..), then it depends on the number of rpm the motor is designed.
For example you can have 2 motors with the same power, but one is designed to provide a better acceleration and the second to have a better maximum speed (high torque vs hi speed motor).

Tue, 05/29/2012 - 12:49

ccriss

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Re: Upgrade to Lithium and controller overvolting

After several tests at home I finally installed the Arduino bluetooth shield on my "Arduscooter" and now the communication between my Android phone and Arduino is completed.
At the moment the interface has only 1 direction: from Arduino to the phone, but this is just the first step, Android opens to a wide range of possibilities:-)

This is the video, this time it's in English or something similar:-( Be patient, I'm not a mother tongue!!

http://www.youtube.com/watch?v=7Mb1dFQ6irQ

Bye