According to Tesla patents and videos, industry reports and journal papers and other network public information, I compiled a PPT: Tesla 4680 battery structure and process design. If you don't understand what is wrong, you are welcome to criticize and correct it.
The polar coordinate equation for archimedes spirals is:
where a and b are real numbers. When θ=0, a is the distance from the start point to the origin of the polar coordinates. dr/dθ = b, b is the value of each increase in the spiral of the unit angle r. Changing parameter a is equivalent to a rotating spiral, while parameter b controls the distance between two adjacent curves. The flat Cartesian coordinate equation for Archimedes spirals is:
A cylindrical battery design table was produced with EXCELL, which mainly includes positive electrode material, negative electrode material, positive electrode plate design, negative pole plate design, core design, parts, battery performance and other parts. For ease of comparison, each battery parameter is organized into a column. According to the data of Tesla 21700 battery, the parameters of the battery design table are confirmed and verified.
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