Battery Cooling & Discharge Question

[DanCoon]

Do the battery modules inside the battery pack discharge at an equal rate, or do they discharge one-by-one? The thought occured to me today that if it were the case that they discharge one-by-one then it should be easier for the chiller to manage the temperature of a battery that has a low charge, than a fully charged battery.

When I was in Death Valley earlier this month I noticed that there was no dip in A/C performance and the car had no trouble getting around... then I remembered that I was cruizing in the area with a 10% - 20% charge the whole time since the resort wasn't that far away.

Just curious.

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[timbop]

Within a module they are wired together in series, and the modules are wired together in parallel. So they all discharge together.

 

[DanCoon]

Within a module they are wired together in series, and the modules are wired together in parallel. So they all discharge together.

Ah ok well there goes that theory. Thanks!

 

[SnBGC]

The car routinely attempts to balance the voltage between all modules.

 

[MailGuy]

And they’re all colled by a common cooling plate on the bottom of the battery. No individual cell cooling. Tesla uses a continuous loop snaked around their cells, but they all still cool/warm together as well.

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