Calculating theoretical efficiency.

5552 Views 4 Replies 3 Participants Last post by madderscience, Nov 19, 2008

Frankencar

Discussion Starter · Nov 17, 2008

I'm working on my first EV conversion and really want to run through a lot of theoretical configurations for my battery pack to get the performance I want out of it, but one thing I'm having trouble with is getting an number for "efficiency" or rather, an estimate of watts/mile. This seems to be the key to making any calculations relevant to my vehicle (1986 Mazda RX-7) especially when it comes to the battery pack. What kind of numbers do I need and is there an equation to plug them in to, even if it is just a rough estimate it would really help.

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Frankencar

Discussion Starter · #3 · Nov 18, 2008

Thanks! This calculator is great, I've actually used it before. However, it doesn't (yet) seem to give me the level of customization I need for the battery pack/vehicle etc., though maybe if I play with it more I can pull some useful numbers out of it.

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Frankencar

Discussion Starter · #4 · Nov 18, 2008

Maybe a better way to ask is this: When it comes to how much power you use in a given mile, what are the main contributing factors? Vehicle weight, motor, battery type, aerodynamics, etc.?

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