No.2484

2024-05-02 19:14:5401:12 38

所属专辑：Reading

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How does an EV battery actually work?

By Patrick Sisson

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Lithium-ion batteries, also found in smartphones, power the vast majority of electric vehicles. Lithium is very reactive, and batteries made with it can hold high voltage and exceptional charge, making for an efficient, dense form of energy storage.
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Each battery is a densely packed collection of hundreds, even thousands, of slightly mushy lithium-ion electrochemical cells, usually shaped like cylinders or pouches. Each cell consists of a positive cathode (which typically contains metal oxides made from nickel, manganese, and cobalt); a negative, graphite-based anode; and a liquid solution in the middle, called an electrolyte.

This is where lithium’s reactivity comes into play; its loosely held outer electron can easily be split off, leaving a lithium ion (the atom sans its outer electron). The cell basically works by ping-ponging these ions and electrons back and forth.

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https://www.technologyreview.com/2023/02/17/1068037/how-do-ev-batteries-work/