A123
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Bikini Pack (10kWh)
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
- DOD behavior
- A123 Safety
- Energy and Power Density (M1 = 108.4 Wh/kg, 3300 W/kg, 5800 W/l)
Original A123 cell (M1 specification sheet) - How big, how many and how heavy?
Description | Details |
Target Nominal Capacity (see Range) | 23.76 kWhrs |
20C sag Capacity (~97%) | 23 kWhrs (although with 14p we will not exceed 9C to provide our max 280A) |
Number | (75s14p) x 3 = 3150 cells (810V max and 742V nominal) |
Weight (excluding interconnects) | 2988 x .072 kg = 226.8 kg (with 16p would be 259.2 kg and 27.3 kWhrs) |
Likely A123 50V battery (containing 210 cells)
- 14 parallel x 15 series
- 49.5 V
- 32.2 Ah
- 1.59 kWh
- 14.7 kg + interconnects, packaging and BMS
We would want 15 of these in series to give us the following total pack:
- 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)
- 13 parallel x 15 series
- 49.5 V
- 29.9 Ah
- 1.48 kWh
- 13.65 kg + interconnects, packaging and BMS
We would want 15 of these in series to give us the following total pack:
- 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
Saker Custom A123pack
Bikini Pack
Welding them together
- 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 .
Recommended reading:
- 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
-- Main.PhilipCourt - 09 Feb 2008
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A123 32 Series Automotive Class Lithium Ion
Some information collected from here:
- AHR32113M1Ultra 32mm x 113mm, capacity
7000mAh(4000mAh, 30C continous, 185g) - AHR32157M1HD 32mm x 157mm, capacity 10000mAh
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.