A123

Bikini Pack (10kWh)
Bikini

20Ah Prismatic
http://www.greencarcongress.com/2009/05/a123-prismatic-20090519.html

A123 M1 cell
Nominal voltage: 3.3 V  Nominal capacity: 2.3 Ah   Energy: 7.59 Wh   Weight: 0.07 kg   Dimensions: 65.15mm x 25.85 mm diameter

Original A123 cell (M1 specification sheet) - How big, how many and how heavy?
 * DOD behavior
 * A123 Safety
 * Energy and Power Density (M1 = 108.4 Wh/kg, 3300 W/kg, 5800 W/l)

Likely A123 50V battery (containing 210 cells)
We would want 15 of these in series to give us the following total pack:
 * 14 parallel x 15 series
 * 49.5 V
 * 32.2 Ah
 * 1.59 kWh
 * 14.7 kg + interconnects, packaging and BMS
 * 742 V nominal (810 V peak)
 * 32.2 Ah
 * 23.89 kWh
 * 220.5 kg + interconnects, packaging and BMS (will be under 300kg)
 * Total pack contains 3150 individual M1 cells

Possible smaller A123 50V battery (containing 195 cells)
We would want 15 of these in series to give us the following total pack:
 * 13 parallel x 15 series
 * 49.5 V
 * 29.9 Ah
 * 1.48 kWh
 * 13.65 kg + interconnects, packaging and BMS
 * 742 V nominal
 * 29.9 Ah
 * 22.2 kWh
 * 204.7 kg + interconnects, packaging and BMS (will be well under 300kg)
 * Total pack contains 2925 individual M1 cells

Welding them together
Recommended reading:
 * Bill Dube recommends 4000A, for up to 35ms with 14 lbs of force.
 * Video of the method used on the KillaCycle, note pneumatic actuated head for constant pressure
 * Killacycle battery pack construction and a picture of the finished product before installation into the box.
 * Miyachi newsletter with an article on their welders being used for the Killacycle pack
 * EVDL Discussion
 * Another EVDL Discussion
 * EVDL again... - Bill provides info for sizing cables etc
 * 2SSIC's new A123 pack and further discussion, don't miss more information
 * Need a head like this (e.g. 88A or 188A) and a welder to drive it.
 * http://www.jesk.co.jp/product_search/miyachi/katarogu/katarogue/resistance-synthesis/sougou.pdf
 * http://www.tjsnow.com/supplies/miyachi/cpt_freq_invert.htm
 * http://www.tjsnow.com/supplies/miyachi/powers_tran_table.htm
 * http://wikileaks.org/wiki/Toyota_Prius_A123_car_fire_investigation_report_2008
 * BMS.WebHome links to a discussion about welding cells together

Materials

 * Nickel

-- Main.PhilipCourt - 09 Feb 2008

A123 32 Series Automotive Class Lithium Ion
Some information collected from here: 5600mAh to 7000mah (170g?) and 7800mAh to 10000mah (240g?) but of course that takes no account of other differences in their internal formulation and construction.
 * AHR32113M1Ultra 32mm x 113mm, capacity 7000mAh (4000mAh, 30C continous, 185g)
 * AHR32157M1HD 32mm x 157mm, capacity 10000mAh