Hello people,

I am currently doing a project on electric cars. I am designing the powertrain of an electric race-car on MATLAB/SIMULINK for the Formula Student UK competition.

I am struggling with the claculation of the power required from the power source (battery).

I simulated my design and i found that, the power required for the race-car to complete one lap (1:13 secs) is around 220KW. Does this make sense?

The equation that i used is the following: Pbatt=Torque*ω/efficiency for T>0 and Pbatt=Torque*ω*efficiency for T<0. Then i did the same simulation for the endurance race (it has to complete 22 laps) and it dissipates 3586KW.

Thus, considering the endurance race, i have to provide 3586KW to the motor to complete the race???

I need these values to estimate how much power is needed for the race-car to complete the endurance race wich lasts for 30 mins.

For my first concept i have chosen a YASA 750 DC motor.

Peak Torque @ 360A= 750Nm

Continues torque= 450 Nm

Peak power @ 380V=100KW

Continues power= >50KW

Peak efficiency=95%

Total weight=25Kg

And these are the batteries that i will use:

http://www.boston-power.com/sites/default/files/documents/2012-03 Swing5300 DS Rev1 0.pdf
Can you please help me with the calculations? I need to estimate the maximum power needed to run the car for 30 mins (for the endurance race) and how many batteries have to be connected in series and in parallel.

Thanks in advance