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Vekke · 01-28-2015, 03:02 PM

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?

01-28-2015, 03:02 PM	#1 (permalink)
Vekke Mechanical engineer Join Date: Jan 2009 Location: Kitee (Finland) Posts: 1,275 Siitin - '98 Seat Cordoba Vario 90 day: 58.56 mpg (US) VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L Diesel 90 day: 104.94 mpg (US) A8 luxury fuel sipper - '97 Audi A8 1.2 TDI 6 speed manual 90 day: 64.64 mpg (US) Audi A4B6 Avant Niistäjä - '02 Audi A4b6 1.9tdi 96kW 3L 90 day: 54.57 mpg (US) Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual 90 day: 32.98 mpg (US) A2 1.4TDI - '03 Audi A2 1.4 TDI 90 day: 45.68 mpg (US) A2 1.4 LPG - '02 Audi A2 1.4 (75hp) 90 day: 24.67 mpg (US) Thanks: 273 Thanked 843 Times in 416 Posts	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? __________________ https://www.linkedin.com/in/vesatiainen/ Vesa Tiainen innovation engineer and automotive enthusiast Last edited by Vekke; 01-28-2015 at 03:16 PM..