BMS_a049_SW_Thermal_Event

The battery management system (BMS) detects conditions that indicate a potential propagating thermal event.

Live incidence rate

<0.01% (Extremely rare)

Vehicle messages

Shutdown - Pull over and exit vehicle safely
Immediate service is required

Impact

Indicates rapid temperature rise in conjunction with other critical alerts. Pack may remain inoperable and should be serviced according to proper procedures.

Description

The battery management system (BMS) detects conditions that indicate a potential propagating thermal event.

Cause

At least one brick under/over voltage alert was recently active, and at least one isolation alert was recently active, and at least one battery monitoring board (BMB) missing (MIA) alert was recently active, and the max thermistor temp exceeds the limit, and the pack temperature gradient (maxTemp - minTemp) exceeds the threshold, and that gradient is increasing at a rate greater than the slop threshold.

Clear condition

None. This alert clears upon BMS reset.

Models

Model 3 2017-2023, Model 3 2024+, Model S 2021+, Model X 2021+, Model Y, Model Y 2025+

Visibility

customer, service-fix

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