7.2v R/C Batteries NiMH & NiCad

andrew's picture

I feel that with the proper BMS these 6-cell R/C batteries would work great for a large pack in a motorcycle or bicycle/scooter. The problem is constructing a BMS. As you can see below, they can deliver quite a punch.

This is for the 7.2v R/C batteries available from batteryspace. I did some load testing...

"Powerizer" NiMH R/C 6-cell 7.2v 3000 mAh (not available anymore)
similar to: http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=1298

Note: After connector cut off. Fast charged at 2 amps for a few minutes.

Open Circuit: 7.8
30 amps: 5.83v - 174.9 watts
50 amps: 5.10v - 255 watts
75 amps: 3.174v - 238.05 watts
 

"Powerizer" NiCad R/C 6-cell 7.2v 1700 mAh Battery No. 1
http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=89
Supposed to have "sintered" electrode which should lower internal resistance.
Note: After connector cut off. Battery was overcharged at 250 mA for <24 hrs

Open Circuit: 8.41
30 amps: 6.5 - 195 watts
50 amps: 5.42 - 271 watts
80 amps: 3.61 - 288.8 watts
 

"Powerizer" NiCad R/C 6-cell 7.2v 1700 mAh Battery No. 2
Note: After connector cut off. Battery was not overcharged, but charged at 250 mA for 7.0 hrs.

Open Circuit: 8.47
30 amps: 6.61 - 198.3 watts
50 amps: 5.53 - 276.5 watts
80 amps: 3.75 - 300 watts

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