Lithium cell tests

[grant_ploughbot]

Lithium cell tests

That looks very nice, very cheap too for what it is!!!
Theres a few like that around now

[Kenny]

Lithium cell tests

I have the e-station bantam BC8, also a very good charger balancer

[leorcc]

Lithium cell tests

That Bantam is a nice one indeed, it looks a bit like this one:

http://unitedhobbies.com/UNITEDHOBBIES/store/uh_viewItem.asp?idProduct=5606http://unitedhobbies.com/UNITEDHOBBI...idProduct=5606

[leorcc]

Lithium cell tests

Robbe now also had a 12s balancer out:

https://www.vliegtuigmodelbouw.nl/artikelen/popup.php?foto=8484https://www.vliegtuigmodelbouw.nl/ar....php?foto=8484

[terrorhurtz]

Lithium cell tests

Yes, the Mega Power Infinity-960SR looks promising. It will be intersting to see how good a job it makes of balancing.

The Robbe Power Peak Infinity 3 + TOP Equaliser 12S seems to be the same, but over twice the price...

http://at.robbe-online.net/rims_at.storefront/47657d0200259e7b271b3e0dc1460637/Product/View/1&2D8429http://at.robbe-online.net/rims_at.s...3e0dc1460637/P roduct/View/1&2D8429

http://at.robbe-online.net/rims_at.storefront/47657d0200259e7b271b3e0dc1460637/Product/View/1&2D8484http://at.robbe-online.net/rims_at.s...3e0dc1460637/P roduct/View/1&2D8484

[leorcc]

Lithium cell tests

Well, the first (Dutch) test results on the Mega Power infinity and equalizer are in and balancing goes really wel on 12s LiPo, So I have no doubt it will do an equally good job on 12s LiFePo4. As usual the Chineze will stick a customs label claiming a value of $30, so 6 Dutch customers never paid any import taxes on them.

[typhoon_driver]

Lithium cell tests

Just seen that robotmarketplace have custom A123 battery packs available. Looks like a much better source compared to tearing dewalt battery packs apart.

[m2xt]

Lithium cell tests

I actually have a 960SR and it is a really nice charger for the A123 but the balancer supplied was not the right one so cannot comment on how well it balances yet.

[m2xt]

Lithium cell tests

I should add that I also use the Xtrema charger on the A123 for charging. Their balancers are due in any time now so I will be able to compare performance. I do find making up A123 packs more difficult than with NiCds.

I have just tested a 10 cell soldered pack at about 11C and 20C but not over impressed with the performance, maybe I was expecting too much? I have also tried A123 in a racing pack configuration and that has a practical limitation on current before the silver loaded paste starts boiling.

[dragonmaster_1]

Lithium cell tests

what do you all think of these
http://www.a123racing.com/html/starterkits.htmlhttp://www.a123racing.com/html/starterkits.html

[terrorhurtz]

Lithium cell tests

These use the same A123 cells and are packaged with a charger. Could be suitable for a feather.
If you only need 10 Volts it would be convenient way of getting everything you need. £145 + DUTY for 6 cells and a balancing charger (Two 3S1P Starter Kit). Best to avoid the Turbo Voltage Controllers - presumably mainly just a device to switch off the power if they get close to fully discharged.

For comparison, the DeWalt 36V packs (10 A123 cells) go for around £70 on ebay.

[woody]

Lithium cell tests

http://cgi.ebay.co.uk/3-DeWALT-36-Volt-Battery-Packs-DC9360-36V-NEW-BATTERIES_W0QQitemZ140197210251QQihZ004QQcategoryZ 20794QQssPageNameZWDVWQQrdZ1QQcmdZViewItemhttp://cgi.ebay.co.uk/3-DeWALT-36-Vo...W-BATTERIES_W0 QQitemZ140197210251QQihZ004QQcategoryZ20794QQssPag eNameZWDVWQQrdZ1QQcmdZViewItem

[woody]

Lithium cell tests

Its 10 months since testing of these cells was sanctioned by the governing body and during this time chargers and balancers have become easily obtainable ... no doubt due to the increased usage of A123 type cells in various applications.

So in the absence of ...as far as I know ... any SAFETY issues should they not now be ratified as suitable for ALL weights of bot?



(Message edited by woody on February 10, 200

[leorcc]

Lithium cell tests

I am in favour of ratification of A123s in all weightclasses. As I was 1 year ago.

[maddox]

Lithium cell tests

I support that motion to accept the A123s in all weightclasses.