1 Lucky Texan
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- Feb 26, 2013
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So where it says . . .
. . . . you reckon that means the pack contains, rather than the pack size is 18650.
When fossicking around, looking for batteries, I got the idea that the 18650 was a size factors number. I.e. the battery was 18mm diameter by 65 mm long. (Don't recall what the zero stood for)
If there are indeed two individual cells in there, they sure have gone to a lot of trouble to contain them.
those cells are are VERY widely used in many configurations so, likely there are 2 inside there and that packaging just makes them a little easier to handle - who knows.
if you broke into 18V, 40 V, 80 V w'ever batteries for various kinds of tools/equipment, you'd find the same 2-3 or so types of cylindrical cells used in various number in series/parallel or mixed configurations. Each Tesla battery 'pack' has about 400 18650 cells. There are, of course, other sizes and rectangular shapes ('prismatic') shapes are becoming popular (Nissan Leaf)but, cylindrical cells work well partyly because of cooling/surface area.
https://www.youtube.com/watch?v=z-_Q8urTqyo