Lithium cell tests

[swanaldo]

Lithium cell tests

i am not happy with my last post on this thread and will be writing a mail to the fighting robots association

[woody]

Lithium cell tests

Edit ......isnt an aeroplane should really read... a RC Aeroplane or Car ....Reference the RC Groups link of my post.

[typhoon_driver]

Lithium cell tests

Apologies, I did mean general use meaning to the general robot population.

Is it possible to put together some formal guidelines for the testing and introduction of new technologies to the sport?

[maddox]

Lithium cell tests

Gary, what do you call new technology?

When hypnodisk shattered Stealth in series 3, the disk weapon was new technology
Antrax/Raven and Behemoth were among the first to use NiCd 7000 mAh cells. Equally new.
When Hardox was introduced in RW, it was new technology.
When Gravity started flipping in Heat D series 7, it was new technology and dangerous too boot.

When is something new technology? Or when is it just cunning use of existing possibilities?

[typhoon_driver]

Lithium cell tests

When it isnt included in the current rule set

I would class the A123 cells as new technology as it is a completely new cell unlike any before

2.4ghz radio is another example

(Message edited by typhoon_driver on August 14, 2007)

[andy_kane]

Lithium cell tests

Just to put things in context,

Terrohurtz hits you with an axe not batteries

[grant_ploughbot]

Lithium cell tests

But it pushes and drives with more batteries, and leaves weight for a heavier axe head.

[andy_kane]

Lithium cell tests

The terrohurtz team are not changing anything but batteries.
And therefore will be weighing lighter than it usually does.
To keep bringing the integrity of this honorable team in to question is surprising to all who know them.
John is doing this testing on behalf of us all.

One of the main areas of benefit is going to be the featherweight folk.

[woody]

Lithium cell tests

Just to put things back into context.
Kan Opener squeezes you with battery power.

Both the above statements .....mine and Andys are really irrelevant to the original concern about weight.

All A123 battery testing Robots should.. IMO .. weigh in at the Championships UNDERWEIGHT by some 2 or 3 kgs ...thus proving that they have ONLY replaced their original batteries with a like for like Amp/Hr rating ....thus gaining NO appreciable power advantage and also showing that extras havent been added due to having a couple of extra kilos spare.

Alternatively ....If they really want to be top limit on weight ......A couple of housebricks tapped inside should be OK for ballast

[woody]

Lithium cell tests

One of the main areas of benefit is going to be the featherweight folk.

I thought that the A123 Batteries were legal in Feathers?

Until further notice, Lithium rechargeable batteries may only be used in robots in the Featherweight class and below

The testing and results supplied by John are of course extremely welcome.

(Message edited by woody on August 14, 2007)

[andy_kane]

Lithium cell tests

The statement applies to Li-Poly.

A123 were barely known of when the statement was made.

All results will be availiable to all

[leorcc]

Lithium cell tests

Excuse me? The Aussies have been using A123 for well on to a year now. The first mentioning was in June 2006, and now more and more featherweight teams are using them over there.

And why is it that a LiPo is allowed in a Feather and an A123 isnt? I read this line the same as Woody did, anything heavier than a feather and Lithium rechargeable is not allowed. To me that says ALL Lithium, not just LiPo in particular.

It sounds a bit funky to me that a battery that is inherently unstable would be allowed while a cell that is mechanicly way more stable isnt.

[waltomar]

Lithium cell tests

I give you now outward point of view. If yuo robot is so bad that it can win because other robot have better batteries perhaps you should build better robot? If safety of this lithium cell is not a problem then it should be ok?

In end batterys are only small part of robot and that it win or not. My robot was only robot with lipo battery in 12kg em compatition. dit it win picause better batteries? - no it lose because I am bad driver!

But 270g 3S 3200mah lipo VS 650g 10cell a GP3300 and lipo is at lower price! I love Finland 3

[leorcc]

Lithium cell tests

Otto, Im not saying that we should disallow the use of LiPo (yet) but not to allow a battery that is safer is really weird.

[dmac]

Lithium cell tests

I dont remember all this fuss when people started using NiCads, like everything else in this sport, somebody has to be first!!, so I say Good luck with the testing John.


Dave Team DMac