Lithium cell tests

**andy_kane** · 14th August 2007, 19:30

The statement applies to Li-Poly.

A123 were barely known of when the statement was made.

All results will be availiable to all

**leorcc** · 15th August 2007, 07:10

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** · 15th August 2007, 08:16

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** · 15th August 2007, 09:03

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** · 15th August 2007, 09:25

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

**ady** · 15th August 2007, 16:47

i know nothing about these batteries etc.. but what i dont get is why more than one robot need to test these batteries to start with? or why dont these robots go through rigerous testing/whiteboards behind closed doors?, at the end of the day it seems someone has spend alot of time researching and testing these for everyone elses benefit as well as their own, but i dont believe they should be used at uk champs!! why not a less important competition? if they were in the rules then fair enough, but due to whats at stake for the winner is this really the place for tryouts? what would peoples opinion be or how would you feel going out to one of these robots in the semis? or seeing one of these win the title.what needs clarifying, is their an unfair advantage, i dont have the answer sorry! just my opinion

**woody** · 15th August 2007, 17:06

what needs clarifying, is their an unfair advantage

Ady ...The batteries in question are very light compared to NiCads of the same rating.
The testing Robots will have no advantage because ... I assume ...they have changed their original batteries for A123 technology on a more or less like for like basis....So theyll just be a little lighter than there original weight.

**typhoon_driver** · 15th August 2007, 17:31

I am prepared to leave this topic alone if I hear the from the roboteers involved that they will not be using the extra weight gained from these cells to modify their machines. In other words, replacing the robots current batteries in a like for like swap.

John we have heard this from you already and I thank you.

Please dont get me wrong, I am exceptionally grateful to the teams involved in testing the new cells if they benefit the entire community but as Adrian says, what needs clarifying, is their an unfair advantage

**maddox** · 15th August 2007, 19:02

To be honnest.
Terrorhurtz would be disadvantaged by the loss of weight. But nothing to be overcome by some ballast in non crusial places like in the center of the robot.

It becomes unfair if everybody else isnt allowed to use Lithium based batteries, and the weightgain is used to enhance offensive or defensive capacity.

***Removed for confidential reasons.***

(Message edited by maddox on August 15, 2007)