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https://www.greencarcongress.com/2024/08/20240830-slac.html
From the SLAC-Stanford Battery center, the very first charge for a Lithium Ion battery cell actually should be at a rather high currents which increased their average lifetime by 50%. Now I'm curious.

Darn, now that made me read the original article:
Researchers discover a surprising way to jump-start battery performance
Typically battery manufacturers use a low energy charge to try and control the SEI layer build up. It's also a slow and costly way to do this. So they went brute force and attempted to use up a large initial supply of lithium during the batteries first charge by creating the SEI (Solid Electrolyte Interphase) with very high currents.

I wasn't too keen on their analogy of comparing it to scooping out water...

Source: https://www.roadandtrack.com/news/a61972616/rivian-evs-destroyed-fire-factory/

Source:


A higher speed electric motor makes a lot of sense:

• Lower current - electrical losses are (I882)*R so a faster turning motor will have a higher, back EMF needed a higher voltage. Higher voltages reduce resistance losses leaving more power to the motor.
• Higher feed voltage reduces current loss in the battery and power lines.

The upper voltage limit is set by the switching power electronics. But this constantly improves as we make better switching devices.

Bob Wilson