How Bugatti's New Electric Motor Bends Physics

It's great to see how the partnership with Rimac is giving Bugatti an extra charge! Check out Onshape for FREE: onshape.pro/Ziroth - It's my go to CAD software and I promise you won't regret giving it a try. Some great comments here adding to the video, here is a summary: 1) Correction at 2:34 - This is not an exponential growth it is a curve with an exponent of 2 (quadratic) - I loosely and inaccurately used the phrase here! 2) The paper at 8:00 uses Celsius to report a percentage drop, which isn't very useful as it's a relative term. 3) I compared RPM as all the motors have similar geometry (automotive size) - but really this forgets the importance of the radius (which needs to be large enough to get some torque from the motor)

A tip: instead of comparing RPM, compare peripheral speed. Speed to material strength ratio is constant wrt size, while RPM have an inverse relation to size (for the same material strength).

The pedantic- the motor does not bend physics, the physics bends it.

The force is going up quadratic and not exponential. Thats a HUGE difference :D

Two (semantic-ish) points: It's not exponential if it goes by the square. And saying "temperature is 23 percent lower/higher" is basically absurd as it's scale-variant.

2:34 Shows parabula. Says "INCREASES EXPONENTIALLY!!"

2:34 small correction: quadratically not exponentially (i.e. v² not eᵛ)

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Nowhere do you explain the "bend physics" statement. Tesla uses carbon fiber wound rotors and presumably so does Bugatti. Liquid cooling of batteries is likewise not new. The only part was the magnetic path which seems to be different from each company, and an area of great concern as each company strives for the optimum configuration. Still how does this "bend physics"?

if you want revs out of an electric motor you reduce it's radius and increase it's length, the closer the magnets are to the center the faster they can spin, I have small electric motors that reach some blistering speeds upto 100,000 rpm using that principle, so i'm quite sure bugatti can too.

How about an 800BHP pure EV version, with the ICE engine and ancillaries replaced with more batteries?

Wow yeah for hybrid aircraft very soon this cooling oil will be extremely important presumably! Many aviation and other applications for all of this!!

I would doublecheak/google diference between powerdensity and discharge rate.

A natural progression from immersion cooling would be turbulated flow cooling, like top spec radiators. The tubes in the radiator have flow disruptors inside which dramatically increase thermal transfer as the cooling fluid is not laminar, but turbulent. I can imagine the cell casing to have a rough exterior to facilitate this.

What sort of pressures do these cooling fluids operate at? Do they suffer from "dead spots" in circulation under lateral loads?

1,800 hp, should be enough to get to the supermarket

I'm honestly all in for oil cooling. At least it won't rust like tesla motors that had a single lip seal keeping coolant away. Also, thin (low viscosity) fluids were sold as aftermarket solution for e-bike outrunner hub motors to improve heat transfer and corrosion resistance at the cost of extra friction.

About 3 years ago I did 3D design a immersive cooled batery pack as a replacment for my Brammo Empulse battery when it eventually gives out. It has also almost twice the amount of energy in the same space and was a bit lighter then the original. It would make 200km trips and fast charging very possible. Good to see I was on the right track.

By the way. Power density isn't how fast a battery can deliver its power, it's how much power it can store per unit volume of the battery.

Interesting. Thanks