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othello · 07.12.2009, 05:38 AM

I disconnected one 9s pack to record the difference between 9s1p A123 and 9s2p A123.

Graph while accelerating from a stand still with 9s1p A123

.Max 107A, 2100W (233W per cell) and voltage drops to 19.62V (2.18V per cell). That's about the max one can expect from an A123 cell without heating them up (a better solder job would also lead to a higher voltage).

Graph while accelerating from a stand still with 9s2p A123

. Max 134A, 3145W (around 174W per cell) and voltage drops to 23.43V (2,6V per cell).

The higher power output with 2p A123 cells is noticeable while accelerating. Acceleration is more explosive ... RPM build up is faster.

	(#22)
othello HV basher Offline Posts: 392 Join Date: Jun 2007 Location: Austria (Europe)	07.12.2009, 05:38 AM I disconnected one 9s pack to record the difference between 9s1p A123 and 9s2p A123. Graph while accelerating from a stand still with 9s1p A123 .Max 107A, 2100W (233W per cell) and voltage drops to 19.62V (2.18V per cell). That's about the max one can expect from an A123 cell without heating them up (a better solder job would also lead to a higher voltage). Graph while accelerating from a stand still with 9s2p A123 . Max 134A, 3145W (around 174W per cell) and voltage drops to 23.43V (2,6V per cell). The higher power output with 2p A123 cells is noticeable while accelerating. Acceleration is more explosive ... RPM build up is faster. Attached Thumbnails Brushless 1:5 custom 4wd Baja based on 1:8 truggy chassie Jazz 55-10-32, Neu 1515/2Y (1100kv), 9s2p A123 (27v), up to 3.1KW Latest video with eagletree Data inserts: Run on asphalt