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-   -   i2 Battery Communcation Utility Project (https://forums.segwaychat.org/showthread.php?t=35027)

felix_fetche 05-03-2017 07:20 AM

Battery Communcation Utility Project
 
Hi,

Here are one of the first results of my project:

https://www.youtube.com/edit?o=U&video_id=-oevROzBgAg

Intending to measure cells inside battery pack before to open the casing.

Be back with updates.
Felix.

Don M 05-03-2017 10:50 AM

Your link doesn't work for me

Don

Pescador12 05-03-2017 12:15 PM

Yeah, link doesn't work. I think it goes to his account's video edit page.

I have chargers that monitor each battery cell in an electric model but they are only two to six cells. Each cell has its own wires to a separate plug the charger can connect to for monitoring. So, the battery pack has a power plug and a monitor/balancing plug. The dozens of cells in a Segway do not have that kind of wiring so I wonder how they can check individual cells without a voltmeter put on each one (case opened).

Don M 05-03-2017 02:51 PM

I would guess he can't monitor individual cells either - Probably only the 23 groups of 4 cells in parallel

Don

felix_fetche 05-04-2017 03:41 AM

here is new link:
https://youtu.be/-oevROzBgAg

of course not each cell, but 23 groups,
(23 raw values, scaled , but for the moment not offseted, working on it...).
and:
-average temperature
-four temperature sensors,
-state of charge bar graph,
-chemistry and Rev.XX,
-statuses registers, and so on...



Be back with updates!

MTOBATTERY 05-08-2017 11:47 AM

We have software that does this as well along with many other functions. It looks like your doing a great job so far!

felix_fetche 05-09-2017 05:26 PM

Hiello MTO,

Is only a beginning, I'm working on it, now i have implemented a touchscreen TFT display, the 20x4 was very poor for this application.
Basically is about challenge an ambition to do that, but on the other side i really need this tool in my workshop. Will implement charge/discharge function to integrate the current and calculate the real capacity of the battery, useful function when i have to sort the best or weakest batteries from a lot.
be back soon!

felix_fetche 05-10-2017 12:50 PM

https://youtu.be/VJa-NJ7qd3Q

New TFT Display implemented.
Next is the menu and a nice look, good page arrangement and alignment.
Most of the parameters are ready calculated and good to be displayed.
Cheers!

felix_fetche 05-12-2017 04:03 AM

1 Attachment(s)
New graphics

Pescador12 05-12-2017 01:16 PM

Nice display.

Take a look at the old Cellpro 4s lithium battery chargers FMA used to make (might still). It is just a circuit board with standoffs that hold a metal face plate/display with heavy clear shrink wrap around the whole assembly.

A nice sticker covered the face plate so it looked professional. No case needed (shrink wrap is the case) and easy access to the mode switch and cable connectors. I think that is how they made them when they were a start up.

Cellpro 4s pics:
http://www.bing.com/images/search?vi...x=4&ajaxhist=0

http://www.bing.com/images/search?vi...=17&ajaxhist=0


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