Battery Overheat Warning Using Theoretical Temperature Comparison
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Solution Overview
Problem
Current methods for detecting overheating in lithium batteries used in energy storage power stations are not timely or accurate, often failing to detect issues until the temperature readings from sensors are outside normal ranges.
Innovation Solution
A battery overheat warning method that calculates a theoretical temperature based on working condition and geometric parameters, and compares it with actual temperatures measured by transducers to determine if an overheat warning should be sent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature readings from sensors are used to determine overheating danger, then the detection method is simple, but the timeliness and accuracy are insufficient
Solution Approach 1:
The system performs preliminary thermal modeling and simulation to establish theoretical temperature distributions under normal operating conditions before actual overheating occurs. By pre-calculating expected temperature fields based on battery geometry, material properties, and operating parameters, the system creates a baseline for comparison that enables early detection of abnormal thermal behavior before sensor readings indicate danger
Solution Approach 2:
The patent introduces theoretical temperature calculations as an intermediary between direct sensor measurements and overheating determination. Instead of relying solely on raw sensor data, the system compares actual sensor readings against theoretically modeled temperature distributions, using this intermediate reference frame to improve detection accuracy and reduce false positives while maintaining system simplicity
2Reliability
If only actual temperature sensor readings are used, then the system is easy to implement, but it cannot detect issues until temperatures are already outside normal ranges
Solution Approach 1:
The system performs preliminary thermal modeling and simulation to establish theoretical temperature distributions under normal operating conditions before actual overheating occurs. By pre-calculating expected temperature fields based on battery geometry, material properties, and operating parameters, the system creates a baseline for comparison that enables early detection of abnormal thermal behavior before sensor readings indicate danger
Solution Approach 2:
The system implements continuous feedback by comparing real-time sensor measurements against dynamically updated theoretical temperature models. When deviations between actual and predicted temperatures exceed predetermined thresholds, the system triggers warnings, enabling proactive safety intervention before critical overheating occurs, thus reducing detection time delay while improving reliability
3Measurement precision
If theoretical temperature calculation based on working conditions and geometry is implemented, then detection accuracy improves, but calculation complexity increases
Solution Approach 1:
The system utilizes changes in operating parameters (current, voltage, state of charge) and geometric characteristics to dynamically adjust theoretical temperature calculations. By monitoring how these parameters change during battery operation and incorporating them into thermal models, the system achieves accurate real-time temperature assessment without requiring complex additional hardware, balancing precision with computational feasibility
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 allows for accurate and timely determination of warning signal levels, even if the actual temperature is within normal ranges, thereby enhancing the safety and reliability of energy storage power stations.
Implementation Method 1
obtaining an actual temperature of the target position in the battery by using a temperature transducer
Implementation Method 2
obtaining a polarization heat, a reaction heat, and an ohmic heat of the battery based on the electrochemical parameters of the battery
Implementation Method 3
obtaining a polarization heat, a reaction heat, and an ohmic heat of the battery based on the electrochemical parameters of the battery
Implementation Method 4
constructing a heat conduction equation based on the total battery heat and the battery mesh; solving the discretized heat conduction equation to obtain the theoretical temperature
Data Source
AI summary
A battery overheat warning method, a battery overheat warning system, a storage medium, and an electronic device are provided. The battery overheat warning method comprises: obtaining working condition parameters and geometric parameters of a battery; obtaining a theoretical temperature of a target position in the battery based on the working condition parameters and the geometric parameters of the battery; obtaining an actual temperature of the target position in the battery by using a temperature transducer; and sending an overheat warning signal based on the theoretical temperature and the actual temperature of the target position in the battery. The battery overheat warning method has relatively high timeliness and accuracy.