Danny -- Indeed IB made changes to the cell. The main MATERIALS that you are talking about are the alloys
used for the electrodes
. IB is using a much cleaner and efficient alloy at the electrodes (the positive and negative side of the cell).
A cell performs a chemical reaction, thus generating ENERGY
. This is an endothermic and exothermic process. IB has managed to achieve the best balance attainable between the endo and exo reactions, thus efficiency increases. THEREFORE THE HIGHER VOLTAGES THAT WE SEE
The voltage of a NiMh battery is defined by the chemical reaction listed here, nothing else can alter or increase the voltage:
Anode .........MH + OH- —> M + H2O + e- ...............0.83
Cathode .....NiOOH + H2O + e- —> Ni(OH)2 + OH- ....0.52
Overall .......NiOOH + MH —> Ni(OH)2 + M ...............1.35
As you can see the reaction generates 1.35V. Anyone that tests NiMh batteries on an ongoing basis knows that this the intitial discharge voltage for an IB (which is GREAT!!!)
. It will start droping to 1.27v(+/-) within a few milliamps(seconds) after a load is applied.
The anodes used in these cells are complex alloys containing many metals. such as an alloy of V, Ti, Zr, Ni, Cr, Co, and Fe
. The underlying chemistry of these alloys and the reasons for superior performance are not clearly understood. Only through continous testing can we find the best empirical combinations
A very interesting fact about these alloys is that some metals absorb heat when absorbiong hydrogen, and some give off heat when absorbing hydrogen. Both of these are bad for a battery, since it is better for the hydregen to move easily in and out without any energy transfer. The successful alloys are all mixtures of exothermic and endothermic metals to achieve this. It is obvious that the chemists at IB have found the right metal alloys to build the BEST possible electrodes up to date.
NOTE: Hydrogen is a byproduct of the chemical reaction
This is one of the reasons why motors are getting hot. BETTER EFFICIENCY AND CELL PERFORMANCE. I am not going to go into detail, but the answer lies herein.
Those who understand how motors operate can achieve the best possible balance (tuning a motor) between current, power, temp, and speed. You just can not tune a motor based on no load current
, because as many have said, the IB's seem to deliver more current than other batteries when the motors demand it. IT IS NOT POWER it's the current handling capabilities of the IB.
Motors are not timed right, gearing is not done right, brush selection may not be right... etc... All people need to do is experiment untill they get the right combination. By understanding how motors operate the process is much easier.
The current that Danny is talking about is oversaturating the magnetic field, thus causing a higher IR (at the motor), this increases the temperature and becomes an infinite loop.
In all honesty, EVERYONE in here has a true point about the motor overheating problem.
Some of you may laugh at engineers, our calculations, and everything else, but WE can figure out why this is happening and figure out REAL solutions to the problem. NO BS
I have been testing IBs since late April so we (Axxis Racing) know what is happening and we have found some solutions to these problems.
BTW, AXXIS RACING will start testing the IB4200s the first week of Jan.
It will take us some time to figure out the best way to enhance and get the most energy out of them. Once we figure how we can increase the performance through the HES process we will release it for sale. In the meantime, we will be doing lab and track tests on the IB4200.
The results will be posted at our website.
I am going to this extent to explain what happens inside the battery so that most of you will have a better knowledge of batteries. The more you know, better decisions you will make, and maybe you will be the one with the "WINNER" sign in the front cover of the magazines
I hope this will help.