Electric cars have ONE battery with thousands of *cells*. I do realize that the colloquial term for "cell" is "battery" (ex: an AA cell is called a battery), but it becomes important to be precise with our words when talking about manufacturing.

Small scale Li-ion does a protection-IC per cell (ex: cell phones), mostly because cell phones are so small they only use one cell.

Larger scale Li-ion, such as Laptop batteries, may use one-IC per cell, OR one-protection IC for all 3x or 4x cells combined. As long as all the cells are soldered together, one protection IC is cheaper and still usable.

At electric-car scales, you have thousands-and-thousands of cells. You can't just manage all of them with one IC, so you build an IC per bundle. Maybe 48 cells or 100-cells per IC or so.

Indeed yes I meant cells, I'm not a native English speaker.

> At electric-car scales, you have thousands-and-thousands of cells. You can't just manage all of them with one IC, so you build an IC per bundle. Maybe 48 cells or 100-cells per IC or so.

Ah okay, I had more expected something on the order of 1 IC per 4 cells to allow individual cell health monitoring.

> Indeed yes I meant cells, I'm not a native English speaker.

You're doing fine. Native English speakers don't know the difference between cell or battery either. This is more of a precise / technical engineering distinction.

* 9V Battery (https://imgur.com/FHJdhIK), a collection of 6x cells.

* AAAA Cell (one singular chemical reaction of 1.5V)

Notice that the imgur is wrong: they call it a AAAA battery (when the proper term is a AAAA cell).

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"Battery" is a bunch of objects doing one task. Originally, a "battery" described cannons. Or two rooks (in chess) that work together. Or... 6x 1.5V cells working together to produce a 9V battery.

In Russian the word "battery" is most commonly used to mean a hot water radiator in an apartment.

Which is a collection of fins.

An electrical battery is called akkumulator.

I always thought the "cell" in "cellular phone" came from the network topology, not the battery format.

Oh it does come from the network region/cells. In fact in the old days when the phones were the size of an actual brick they were probably powered by a proper multi-cell battery. (Did I miss a joke?)

This is blatantly false, unless you are confusing battery for an assembled battery pack. In EVs each battery management IC can run somewhere in the range of 4-14 cells in series per chip, and they almost universally run banks of up to 100 cells in parallel. For example, in the tesla model s the pack is comprised into submodules of 76 cells in parallel and 6 of those groups in series per management chip--so only one management chip per 456 cells.