Battery Module Liquid Leakage Detection via Temperature Change Rate
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Solution Overview
Problem
Current battery safety detection methods, particularly for liquid leakage and thermal runaway, are costly and require additional gas detectors for each battery box, posing a significant safety risk due to the potential for explosions or fires if not timely managed.
Innovation Solution
A safety detection method utilizing existing temperature sensors in battery modules to monitor temperature changes and voltage fluctuations, allowing for the detection of liquid leakage and thermal runaway risks without the need for additional detection components, thereby reducing costs and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gas detectors are disposed at air exhaust vents of each battery box to detect liquid leakage risk, then detection accuracy is improved, but device complexity and detection costs increase
Solution Approach 1:
The temperature sensor performs multiple functions: it monitors battery temperature for thermal management and simultaneously detects liquid leakage risks by monitoring temperature change rates. This multi-functionality eliminates the need for separate gas detectors while maintaining detection capability.
Solution Approach 2:
The existing temperature sensor system serves itself by extending its functionality to detect liquid leakage risks through temperature change rate analysis, without requiring additional detection components or systems.
2Reliability
If additional gas detectors are added to each battery box for safety detection, then safety detection capability is improved, but manufacturing cost increases
Solution Approach 1:
The temperature sensor is designed to perform both temperature monitoring and liquid leakage detection functions, eliminating the need for additional gas detectors and reducing overall detection system costs while maintaining safety capabilities.
Solution Approach 2:
The existing temperature sensor system extends its functionality to provide safety detection for liquid leakage risks, making the system self-sufficient without requiring additional detection components or increasing manufacturing costs.
3Measurement precision
If temperature change rate monitoring is implemented to detect liquid leakage risk, then detection accuracy is improved, but computational complexity increases
Solution Approach 1:
The detection method transitions from monitoring absolute temperature values to monitoring the rate of temperature change. This parameter transformation enables liquid leakage detection through relatively simple derivative calculations based on sequential temperature measurements, maintaining computational simplicity while improving detection accuracy.
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
This method effectively identifies liquid leakage and thermal runaway risks using existing temperature sensors, enabling timely intervention to prevent adverse events, such as explosions or fires, while maintaining a simple structure and low detection costs.
Implementation Method 1
each temperature sensor is configured to detect a battery temperature of at least one battery corresponding to the temperature sensor
Data Source
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AI summary
This application provides a safety detection method for a battery module, a battery module, a battery pack, and an energy storage system. The battery module includes a plurality of temperature sensors and a plurality of batteries, and the plurality of temperature sensors include a first temperature sensor. The method includes: obtaining a plurality of battery temperatures detected by the plurality of temperature sensors at a first moment; determining a standard battery temperature based on the plurality of battery temperatures detected by the plurality of temperature sensors at the first moment; obtaining a second battery temperature of a first battery set at a second moment; determining a temperature change rate of first battery set based on a first battery temperature, a second battery temperature, the first moment, and the second moment; and determining that a battery in the first battery set has a liquid leakage risk when a third difference between the first battery temperature detected by the first temperature sensor at the first moment and the standard battery temperature is greater than a first temperature threshold, and the temperature change rate is greater than a temperature change rate threshold. According to this application, safety detection costs can be reduced, and applicability is high.