Thermal Event Detection and Notification for Vehicle Batteries

Methods, computing systems, and technology for thermal propagation monitoring and notification via air when vehicle is off are presented. For example, a computing system may be configured to obtain, while the vehicle is in an off state, battery data indicative of a state of a battery onboard the vehicle. The computing system may be configured to determine, based on the battery data, an occurrence of a thermal event onboard the vehicle while the vehicle is in the off state. The computing system may be configured to, in response to determining the occurrence of the thermal event, generate a message associated with the battery. The computing system may be configured to output, to one or more computing devices remote from the vehicle, the message associated with the battery.