Removable Off-Gas Detection for Mobile Equipment Battery Charging
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Solution Overview
Problem
Existing systems face challenges in detecting thermal runaway of batteries in uncontrolled environments, particularly during charging, due to difficulties in obtaining representative air samples for off-gas detection.
Innovation Solution
An off-gas detection system with a removable detection device that defines a controlled flow path between battery cells and a detector, using a fan to draw air samples and a controller to initiate actions such as disabling charging or activating fire suppression based on off-gas concentration or thermal runaway detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If off-gas detection is performed in uncontrolled environments without a controlled flow path, then the system structure remains simple, but the detection reliability deteriorates due to inability to obtain concentrated air samples
Solution Approach 1:
A controlled flow path is introduced as an intermediary component between the uncontrolled environment and the off-gas detector. This flow path concentrates off-gases from battery cells into a defined channel, allowing the detector to reliably identify thermal runaway events even in uncontrolled environments without requiring complex environmental modifications.
2Reliability
If detectors are installed in each mobile equipment, then the detection coverage is improved, but the installation complexity and cost increase
Solution Approach 1:
The off-gas detection system is designed as a universal, portable unit that can be deployed across multiple mobile equipment locations. The removable design with standardized interfaces allows a single detector design to serve multiple battery charging locations, eliminating the need for custom installations at each site while maintaining comprehensive detection coverage.
Solution Approach 2:
The detection system is segmented into removable modular components including the detector, controlled flow path, and power supply. This segmentation enables flexible deployment where the detector can be moved between different mobile equipment locations, providing wide coverage without permanent installation at each location.
3Reliability
If the off-gas detection device is permanently installed, then the detection stability is improved, but the adaptability to different locations deteriorates
Solution Approach 1:
The off-gas detection device incorporates removable couplings and standardized interfaces that enable dynamic reconfiguration. The detector can be easily connected to and disconnected from different mobile equipment locations, providing both detection stability during operation and adaptability for deployment across multiple locations without permanent installation.
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 effective detection of off-gases and thermal runaway in uncontrolled environments, reducing the need for individual detectors in each piece of equipment and minimizing battery failure risks during charging.
Implementation Method 1
the electric motor and the fan are configured to operate to draw air along the controlled flow path from the electrical energy storage device to the off-gas detector
Data Source
AI summary
An off-gas detection system for mobile equipment includes an off-gas detection device, and a controller. The off-gas detection device is configured to removably couple with the mobile equipment. The off-gas detection device is configured to define a controlled flow path between an electrical energy storage device of the mobile equipment and an off-gas detector. The controller is configured to receive data from the off-gas detector regarding an air sample, determine a presence or concentration of off-gas within the air sample, and initiate one or more actions in response to determining the presence or concentration of off-gas in the air sample.