Off-State Battery Thermal Event Detection With Remote Alerts
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Solution Overview
Problem
Existing vehicle battery systems lack effective monitoring for thermal events, such as thermal runaway, which can occur when the vehicle is in an off state, potentially causing damage and posing safety risks to passengers and surrounding objects.
Innovation Solution
A computing system on the vehicle monitors battery data while in an off state to detect thermal events like thermal runaway, generating messages that are sent to remote computing devices to alert users and services, enabling proactive action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the vehicle is in an off state with minimal power consumption, then energy efficiency is improved, but battery thermal event monitoring capability deteriorates
Solution Approach 1:
The control circuit is configured to obtain battery data and detect thermal events even when the vehicle is in an off state, performing monitoring actions in advance before the vehicle is fully operational. This allows the system to maintain safety monitoring capabilities during low-power states without requiring full system activation.
Solution Approach 2:
The control circuit acts as an intermediary component that can independently monitor battery thermal events without requiring the entire vehicle system to be active. It serves as a bridge between the battery and remote computing devices, enabling selective monitoring functionality that operates independently of the main vehicle power state.
2Measurement precision
If comprehensive battery monitoring is implemented while the vehicle is off, then thermal event detection capability is improved, but power consumption increases
Solution Approach 1:
The system implements partial monitoring by focusing specifically on thermal event detection parameters rather than comprehensive battery monitoring. The control circuit selectively measures temperature and thermal runaway indicators while leaving other battery parameters unmonitored during off states, achieving adequate safety monitoring with minimal power consumption.
3Loss of time
If real-time notification system is activated, then safety response time is improved, but device complexity increases
Solution Approach 1:
The notification functionality is extracted from the main vehicle system and implemented as a separate, dedicated function in the control circuit. This allows the notification system to operate independently with minimal integration requirements, reducing overall system complexity while maintaining real-time alert capabilities through direct communication with remote computing devices.
Data Source
AI summary
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.