The new Tesla S batteries are not old lead plate types. The battery packs are composed of 2170 Lithium cells, which are similar to the 18650 cells found in laptop batteries, and most portable power packs. Cells are 21mm in diameter and 70 mm long, which gives you an idea of how many of these individuals cells are required for Tesla’s battery packs. Improved chemistry as well as size increased cell capacity...with however serious caveats...
“The change in form factor of its battery cells isn’t all good news, though, according to Jack, as the new chemistry results in a flammability temperature of just 150–180°F due to the higher energy density of its cells — compared to a flammability point of 350°F with the 18650 cells. The increased risk of flammability of the new cell design is likely why Tesla chose to upgrade the cooling system of the Model 3 pack, mitigating the increased risk at the cellular level.”
Hich accounts for the increased cooling not just at the Supercharger station but in each model Tesla 3. First responders have greater cause for concern at accident sites.
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