this post was submitted on 24 Jun 2024
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Arizona toddler rescued after getting trapped in a Tesla with a dead battery | The Model Y’s 12-volt battery, which powers things like the doors and windows, died (www.theverge.com)
submitted 4 months ago by [email protected] to c/[email protected]
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[–] [email protected] 19 points 4 months ago (1 children)

During the pandemic my car sat in the garage until the battery died. After 7 hours of charging it, turned on the car and found the hybrid battery was almost full.

I get why the high and low voltage systems are separate, but damn that was one of those "Really!?" moments...

[–] [email protected] 7 points 4 months ago

It's much much much cheaper to use the same 12V systems that other cars use.

Kia/hyundai solved this by having a disconnect on their (li-ion) 12V battery. When the voltage gets low it completely isolates the battery. There is a button inside the car that reconnects it right before starting the car.