Battery Pack Outgassing Detection With Multi-Level Fire Response
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Solution Overview
Problem
Battery packs in vehicles are prone to gas leaks from failing cells, which can lead to fire events and explosions, making early detection and suppression systems crucial.
Innovation Solution
A gas detection system with multiple alarm levels and a controller that activates a fire suppressant system to cool and extinguish fires, combined with an emergency fire suppression system for additional cooling and recycling of spent suppressants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas detection systems are integrated into battery packs to detect gas leaks, then detection capability is improved, but device complexity increases
Solution Approach 1:
The gas detection system is integrated with the fire suppression system into a unified safety system. The controller receives signals from both gas detectors and infrared detectors, and controls both alarm outputs and fire suppressant release, merging detection and response functions into a single coordinated system that improves reliability while managing complexity through functional integration.
Solution Approach 2:
The controller serves multiple functions: it processes signals from gas detectors, processes signals from infrared detectors, controls alarm outputs, and controls fire suppressant release. This multi-functional approach consolidates what would otherwise be separate systems, improving detection capability while avoiding the complexity of multiple independent control units.
2Measurement precision
If multiple alarm levels are implemented to differentiate gas concentration thresholds, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system uses parameter changes in gas concentration to trigger different alarm levels. The controller compares detected gas concentrations against predefined thresholds and generates different alarm signals (first alarm level, second alarm level, or no alarm) based on the concentration parameter, achieving precise measurement differentiation through simple threshold-based logic rather than complex classification systems.
3Speed
If rapid response to gas leaks is implemented through automated fire suppression, then response speed is improved, but device complexity increases
Solution Approach 1:
Fire suppressants are pre-positioned within the battery pack housing, ready for immediate deployment. When the controller detects gas concentrations exceeding thresholds, it triggers the suppressant release mechanism without delay, achieving rapid response through advance preparation of suppression materials and simple trigger-based deployment logic.
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
The system effectively detects gas leaks and suppresses fires in battery packs, reducing damage and providing multiple opportunities for fire suppression, including recycling to minimize environmental impact.
Implementation Method 1
The detector is configured to sense a concentration value of one or more gases
Implementation Method 2
a detector configured to sense a concentration value of one or more gases and/or a level of infrared radiation within the battery pack
Data Source
AI summary
A system for detecting gas leakage within a battery pack includes a battery pack, a controller, and a detector. The battery pack comprises a plurality of cells which may be subject to a gas leakage. The detector is configured to sense a concentration value of one or more gases. The detector is further configured to generate a return signal indicative of no alarm, a first alarm level, or a second alarm level. The detector is electrically connected to the controller and is configured to transmit the return signal to the controller. The controller is configured to output a first alarm level or a second alarm level in response to the return signal. Emergency response procedures may be implemented based on the level of gas leakage within the battery pack indicated.