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Old 01-28-2015, 02:02 PM   #1 (permalink)
Vekke
Mechanical engineer
 
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Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 1,176

Siitin - '98 Seat Cordoba Vario
90 day: 58.56 mpg (US)

VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L
Diesel
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A8 luxury fuel sipper - '97 Audi A8 1.2 TDI 6 speed manual
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Audi A4B6 Avant Niistäjä - '02 Audi A4b6 1.9tdi 96kW 3L
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Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual
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A2 1.4TDI - '03 Audi A2 1.4 TDI
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30second 120kW battery pack

I am designing my EV battery pack to A8 project and target is to make 120 kW for max about 30 seconds acceleration (standing mile).

I havent yet decided about the motors but I could still need some help on the EV design specs. So battery should have minimum weight I have made some calculations:

Voltage 350-370V
P=120000W
I= 342A with that 350V

30s-->0,0083hours

C=342Ax0,0083=2,84Ah

With 20% margin that would need 3,5 Ah pack.

What would you recommend using?.

I would like to use something like these:
GTL Rechargeable 3.7V "5800mAh" 26650 Lithium Battery w/ Protection Circuit Module - Brown (2 PCS) - Free Shipping - DealExtreme

Tesla is still using 18650 type batteries?

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Vesa Tiainen innovation engineer and automotive enthusiast

Last edited by Vekke; 01-28-2015 at 02:16 PM..
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