A nifty new cell for 1/12 scale (maybe)
#1
A nifty new cell for 1/12 scale (maybe)
A guy was in at our hobby store (RCP in Madison) today and informed me of these cells. He is apparently one of the first to import these into the US.
Specs for single cell:
Nominal voltage ------ 2.4v
Capacity ------------ 4200 mAh
Size -----------------65x95x13
Charge time to 90% - 5 minutes
Cycle Life ----------- 5000 cycles
Energy Density ----- 50.4Wh/kg
Might make a perfect 1/12 scale pack in a 2S form, if it would fit.
http://techon.nikkeibp.co.jp/english...071212/144076/
Specs for single cell:
Nominal voltage ------ 2.4v
Capacity ------------ 4200 mAh
Size -----------------65x95x13
Charge time to 90% - 5 minutes
Cycle Life ----------- 5000 cycles
Energy Density ----- 50.4Wh/kg
Might make a perfect 1/12 scale pack in a 2S form, if it would fit.
http://techon.nikkeibp.co.jp/english...071212/144076/
#2
Tech Adept
The current capacity and nominal voltage of the cell are 4.2Ah and 2.4V, respectively. Its dimension is approximately 62 × 95 × 13mm. And its weight is about 150g. Therefore, its energy density is about 67.2Wh/kg (131.6Wh/L).
I think A123 cells are the way to go...
#3
the crushing test is quite impressive, i have to say.
#4
#6
We saw these a long time ago. Interesting cells but there are a lot of questions still. They've been tested at 10C so IR might be an issue.
#7
Tech Adept
I am very surprized you do not have these cells and performed extensive testing on them already. You are always 2 steps ahead.
#8
#9
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#11
If you mean in 1/12th specifically, the problem with lipos is the voltage. These things are 2.4 which is perfect. 2 cells instead of four or one with 4 cell NiMH voltage. Something like this just might work. Then again, maybe not.
#12
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Also, two indivisual cells leaves some love for the t plate crowd.
As far as price goes, it will decrease drastically as the technology becomes more and more standered... Just like everthing else.
As far as price goes, it will decrease drastically as the technology becomes more and more standered... Just like everthing else.
#13
Time will tell like most things, there will probably be some other technology within the next few years if not months. Price will only come down but technology costs!
#14
Don't count on these cells making it big anytime soon.
The reason is because majority of the batteries in development are for battery back-up systems, off-grid systems and Electic and Hybird vehicals. RC is an after thought for use of batteries.
These batteries are 2.4V nominal voltage and require a charge controller. An electric car will have voltages from 200 to 500V and by having a nominal voltage lower than Li-Ion or Li-PO, you will have to incrase the charge controller channels by 50% increasing the cost. Extra cost will decrease the likelyhood these batteries are going to make full scale production. For small stuff like laptops and power tools, Li-Ion has shown to be well suited, taking away the need for SCiB batteries.
I know many will say that 1.2V NiMH and NiCD are used in EV's and that would require twice as many channels on the charge controller as the SCiB 2.4V batteries. The difference is that the NiMH batteries are grouped into normally 12V or 6V groups for each channel of the charge controller. The reason is because NiMH/CD can somewhat withstand a little extra during the charge process. This would be similar to how hobbyist currently charge a 7.2V NiMH battery pack without montitoring each cells voltages.
The reason is because majority of the batteries in development are for battery back-up systems, off-grid systems and Electic and Hybird vehicals. RC is an after thought for use of batteries.
These batteries are 2.4V nominal voltage and require a charge controller. An electric car will have voltages from 200 to 500V and by having a nominal voltage lower than Li-Ion or Li-PO, you will have to incrase the charge controller channels by 50% increasing the cost. Extra cost will decrease the likelyhood these batteries are going to make full scale production. For small stuff like laptops and power tools, Li-Ion has shown to be well suited, taking away the need for SCiB batteries.
I know many will say that 1.2V NiMH and NiCD are used in EV's and that would require twice as many channels on the charge controller as the SCiB 2.4V batteries. The difference is that the NiMH batteries are grouped into normally 12V or 6V groups for each channel of the charge controller. The reason is because NiMH/CD can somewhat withstand a little extra during the charge process. This would be similar to how hobbyist currently charge a 7.2V NiMH battery pack without montitoring each cells voltages.