Battery Pack Gas Monitoring for Cell Case Breakage Detection
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Solution Overview
Problem
Existing battery systems lack effective methods to monitor and identify the cause of case breakage in battery cells, which can lead to hazardous material leaks, and consume excessive power when all sensors are continuously active.
Innovation Solution
A battery monitoring apparatus with first and second air quality sensors and a controller that selectively activates sensors based on detection thresholds to determine case breakage and its cause, reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple air quality sensors are always in operation to monitor battery cell case breakage, then detection reliability is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts sensor operation states based on detected conditions. The controller activates the second air quality sensor only when the first sensor detects abnormal concentrations of the first material, transitioning from a static always-on configuration to a dynamic conditional activation model that maintains detection reliability while reducing power consumption during normal operation
Solution Approach 2:
The monitoring system operates in periodic cycles with two distinct modes: a normal monitoring mode where only the first sensor operates, and an abnormal monitoring mode where the second sensor is activated. This periodic switching between operational states allows the system to maintain adequate monitoring coverage while significantly reducing average power consumption compared to continuous full-sensor operation
2Device complexity
If only one type of air quality sensor is used to monitor battery cell, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The monitoring system is segmented into two distinct sensor components with specialized functions: the first air quality sensor monitors for the first material (evaporation product) under normal conditions, while the second air quality sensor monitors for the second material (by-product) when abnormalities are detected. This segmentation allows each sensor to be optimized for specific detection tasks, improving overall measurement precision without requiring a single complex sensor to handle all scenarios
Solution Approach 2:
The controller provides universal coordination for both sensor types, managing their selective activation and integrating their detection results into a unified breakage determination process. This multi-functional control approach allows the system to adapt its monitoring strategy based on detected conditions, achieving high detection precision across different operational states while maintaining manageable system complexity through centralized intelligence
3Speed
If continuous monitoring with all sensors is performed, then detection speed is improved, but power consumption increases
Solution Approach 1:
The system implements periodic monitoring with variable intensity: during normal operation, the first sensor provides continuous monitoring at low power consumption; when abnormal concentrations are detected, the system transitions to a higher-intensity monitoring phase where the second sensor is activated. This periodic adjustment of monitoring intensity maintains fast detection capability for critical events while significantly reducing average power consumption compared to sustained high-intensity monitoring
Solution Approach 2:
The monitoring system dynamically adjusts its detection speed and sensor activation based on real-time conditions. The controller continuously evaluates data from the first sensor and rapidly activates the second sensor when abnormal patterns are detected, ensuring fast response to actual breakage events while avoiding the continuous power consumption associated with having all sensors operating at maximum detection speed at all times
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 direct monitoring of battery cell case integrity and identification of breakage causes while minimizing power usage by selectively operating sensors.
Implementation Method 1
The first material is produced by evaporation of a reactant required for a charge/discharge reaction of the battery cell
Implementation Method 2
The second material is produced as a by-product of the charge/discharge reaction of the battery cell
Data Source
AI summary
A battery monitoring apparatus includes a first air quality sensor to generate a first detection signal indicating a concentration of a first material in an internal space of a battery assembly in which at least one battery cell is positioned, a second air quality sensor to generate a second detection signal indicating a concentration of a second material in the internal space, and a controller to execute a first monitoring mode for collecting the first detection signal in first time series in response to an operation start command. The controller executes a second monitoring mode for collecting the second detection signal in second time series in response to the concentration of the first material indicated by the first detection signal exceeding a first threshold during the execution of the first monitoring mode.