Battery Venting and Gas Sensing for Thermal Runaway Warning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery monitoring systems fail to provide early warning signs of catastrophic failures like thermal runaway due to limited monitoring of gas emissions and neglecting external environmental factors, leading to potential safety hazards.
Innovation Solution
A battery monitoring system that includes a ventilation valve with a gas sensor and a closed expansion space to detect gas emissions, a control unit for data processing, and integration with vehicle and environmental sensors to monitor gas content and predict battery health.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a closed expansion space with ventilation valve is used to contain battery atmosphere, then gas detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent introduces a closed expansion space with a ventilation valve as an intermediary system between the battery and the external environment. This mediator allows controlled gas exchange while maintaining a contained atmosphere for accurate sensor detection, resolving the contradiction by providing both containment (for accuracy) and controlled ventilation (for safety).
Solution Approach 2:
The closed expansion space creates a controlled, substantially inert atmosphere around the battery by limiting external air contact. This inert environment prevents external environmental factors from interfering with gas detection while allowing the battery's own gas emissions to be accurately measured by the sensor.
2Reliability
If multiple gas sensors are deployed to detect different gases, then detection comprehensiveness is improved, but device complexity increases
Solution Approach 1:
The patent divides the gas detection function into multiple specialized sensors, each targeting specific gases (e.g., hydrogen, carbon monoxide, carbon dioxide). This segmentation allows comprehensive monitoring of different gas types while keeping each individual sensor simple and manageable, resolving the contradiction between comprehensiveness and complexity.
Solution Approach 2:
The gas sensor system is designed with multi-functionality to detect various types of gases that may be emitted during different battery failure modes. This universal detection capability improves reliability by covering multiple failure scenarios with a single integrated sensor system rather than requiring separate specialized systems.
3Reliability
If continuous gas monitoring is implemented, then early detection capability is improved, but energy consumption increases
Solution Approach 1:
The patent implements continuous gas monitoring to maintain constant surveillance of battery health, enabling early detection of thermal runaway precursors. The closed expansion space maintains continuous gas containment while the sensor provides uninterrupted detection, ensuring reliability without requiring periodic sampling that could miss critical events.
Solution Approach 2:
The system employs periodic action through the ventilation valve that opens and closes in response to detected gas levels, and through periodic data transmission from sensors to the control unit. This periodic operation allows continuous monitoring capability while reducing energy consumption by activating high-power functions only when needed rather than maintaining constant high-power operation.
4Measurement precision
If control unit processes data from multiple sensors and environmental data, then prediction accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple data sources including gas sensor readings, temperature sensors, and environmental data into a single control unit for integrated analysis. This consolidation of data processing functions improves prediction accuracy by considering multiple factors simultaneously while avoiding the complexity of distributed processing across multiple independent systems.
Solution Approach 2:
The control unit implements feedback mechanisms by continuously comparing sensor data against predetermined thresholds and adjusting system responses accordingly. This feedback loop enables accurate prediction of battery health status and thermal runaway risk by dynamically processing multiple data streams and providing real-time warnings when critical conditions are detected.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables early and accurate detection of thermal runaway and other battery health issues, ensuring timely intervention and enhancing safety, reliability, and longevity of batteries.
Implementation Method 1
a gas sensor is arranged at the atmosphere, at the ventilation valve, and/or at the closed expansion space, the gas sensor is configured to detect a gas leaking or emitting from the battery
Implementation Method 2
the ventilation valve comprises a first port and a second port, the first port being in fluid communication with the housing, the second port is in fluid communication with a closed expansion space
Data Source
AI summary
A battery monitoring system for a vehicle, comprising a battery having one or more cells, a housing wherein the battery is arranged, the housing has an atmosphere, wherein a ventilation valve is arranged at the housing for controlling the atmosphere in the housing, the ventilation valve comprises a first port and a second port, the first port being in fluid communication with the housing, the second port is in fluid communication with a closed expansion space arranged outside the housing, wherein a gas sensor is arranged at the atmosphere, at the ventilation valve, and/or at the closed expansion space, the gas sensor is configured to detect a gas leaking or emitting from the battery.