Why are dozens of 18650s the best solution for high watt projects/products? Like, I’m sure the Tesla battery isn’t just a thousand 18650s, so why do so many (diy projects and professional products alike) just scale up by adding more of these relatively tiny lipstick-tube sized cells?
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For the same reason we use bricks to build a wall instead of looking for wall-sized rocks. It’s easier to move smaller things around in a factory to put stuff together. Also, just like bricks are easy to make in that cornered shape, batteries are easier to make round like they are. And if you keep them small, it’s less expensive to you when you make a mistake with one and have to throw it out. So in the long run, it is less expensive to use many smaller batteries, which makes them better for things like cars that makers need to make money on.
As others have said, Tesla do that exact thing.
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