Author Topic: Do people want a tutorial on Li-Ion?  (Read 1326 times)

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Offline totalisTopic starter

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Do people want a tutorial on Li-Ion?
« on: December 26, 2010, 06:25:03 PM »
If enough people show interest i will make one

I have had success with both the batteries and charger.

The batteries are much lighter and only mildly more expensive than NiMh
The charger was cheaper than the one i have for NiMh

The downside is the consequence for mistakes as lithium doesnt play nice if not used properly ...

anyway, Reply with interest :)

Merry Xmas

T

Offline Rassweiler

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Re: Do people want a tutorial on Li-Ion?
« Reply #1 on: December 30, 2010, 09:19:24 AM »
Hey, merry Christmas, I would be interested in that tutorial.
- Kyle Rassweiler

Offline aruna1

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Re: Do people want a tutorial on Li-Ion?
« Reply #2 on: December 30, 2010, 11:55:03 PM »
yep make the tutorial
once you publish it more people will read it.
I'm Me

Offline Fr0stAngel

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Re: Do people want a tutorial on Li-Ion?
« Reply #3 on: December 31, 2010, 04:30:51 AM »
sure...cause im currently looking for some stable battery pack to power my new craze..! ;)
'crazy' is the new hype! =)

Offline fotografas

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Re: Do people want a tutorial on Li-Ion?
« Reply #4 on: January 04, 2011, 10:37:43 AM »
Li-ion, yes. Actually, now I am looking for some info about Li-ion charging :]

Offline offencerobotics

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Re: Do people want a tutorial on Li-Ion?
« Reply #5 on: January 06, 2011, 10:56:37 PM »
I would love to see this, as I'm looking for some battery for my robot.

Offline totalisTopic starter

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Re: Do people want a tutorial on Li-Ion?
« Reply #6 on: January 11, 2011, 07:56:46 AM »
I have attached the rar of all the files.

I have taken photos of my process of making a phone battery robot friendly.

Basically you start by removing the packaging of the battery; for this particular model (nokia 9500) that involves removing the thin packaging from around the outside, this is not a necessary step but i needed access to solder, and the final battery is smaller.

Pay attention to the plus and minus markings.

Then remove the supporting plastic, being careful not to touch the wires together.

Fold the electronics down so the space isnt wasted, and cover in insulated tape.

There are 3 contacts on top of the battery, one positive, one negative, one is unused but pulled to ground (i think) Dont solder to the centre anyway.

Next you need to prepare the wires, I have included the jumper so than i can stack the batteries, to increase the voltage. Also it is an on off switch.

I initially soldered a pin to the negative terminal and the negative wire to the other half of the jumper, being careful to isolate the centre pad.

I then soldered the positive wire onto the pad, and attached the 0.1" connectors.

Finally the battery is wrapped and ready to go.

These batteries are charged from mobile phone battery chargers, for instance, the 2 i have are for charging HTC Desire batteries.
The batteries cost .99p from ebay, the parts cost a few pence. The chargers cost £3.50 ish, but its a one time investment.

It is useful to have more than one battery as it can get confusing as to which terminal is which.
It also means you can drop the voltage to 5v.

http://dl.dropbox.com/u/5224931/Li%20Ion%20Tutorial.rar


Offline BANE

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Re: Do people want a tutorial on Li-Ion?
« Reply #7 on: January 11, 2011, 09:44:09 AM »
yes please do.  i currently use niMh but would like to try Li-Ion if i knew anything about it.
much thnx

Offline BANE

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Re: Do people want a tutorial on Li-Ion?
« Reply #8 on: January 14, 2011, 11:04:15 AM »
 I haven't read it all yet but might be of interest
http://www.sparkfun.com/tutorials/241
« Last Edit: January 14, 2011, 11:06:03 AM by BANE »

Offline smashing robots

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Re: Do people want a tutorial on Li-Ion?
« Reply #9 on: January 15, 2011, 11:24:06 AM »
Can you share with us a list with comparison, for example you say something that the battery is more lighter - with what percentage is more lighter? or there is no formula?
You can read my articles about robots on www.intorobotics.com

Offline VegaObscura

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Re: Do people want a tutorial on Li-Ion?
« Reply #10 on: January 15, 2011, 12:00:25 PM »
It would be nice to know the exact size, weight, capacity, and current output compared to nimh and alkaline.

Offline Soeren

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Re: Do people want a tutorial on Li-Ion?
« Reply #11 on: January 16, 2011, 06:42:33 PM »
Hi,

Here's a pdf detailing the energy densities of different chemistries.

And a graphical chart from the same site.
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Please remember...
Engineering is based on numbers - not adjectives

Offline madsci1016

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Re: Do people want a tutorial on Li-Ion?
« Reply #12 on: January 16, 2011, 11:04:22 PM »
I wrote a Tutorial a year ago for a friend that had a bunch of cable modem Lithium Ion batteries lying around. He sent me a few and I showed him how to rip out the cells and make a usable battery from them, complete with a protection board that makes Li-ion packs pretty fool proof.

http://www.billporter.info/build-your-own-li-ion-battery-packs-from-leftovers-tutorial/

The resulting packs are 14.4V @ 2.2Ah and cost me $10 to build, since I already had the cells. I use them in most my projects from my multiple robots to my LED lab coat. They work great, and the PCB board will cut power if they drain too low or if I do something stupid like create a short or draw too much current at once.

 


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