Battery Module Thermal Shield for Accurate Cell Temperature Sensing
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Solution Overview
Problem
The existing battery modules experience a significant difference between the actual battery temperature and the detected temperature by the temperature sensor, which can lead to inaccurate temperature readings, potentially causing battery degradation or unsafe charging conditions due to the temperature discrepancy between the battery and the surrounding structure.
Innovation Solution
A battery module design that includes a temperature sensor positioned between the battery and a structure with a thermal shield element, which directs the temperature detection range towards the battery, thereby reducing the temperature difference by minimizing heat flux from the battery to the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is positioned between the battery and the structure to detect battery temperature, then the temperature detection is enabled, but the detected temperature differs significantly from the actual battery temperature due to heat flux toward the structure
Solution Approach 1:
A thermal shield element is introduced as an intermediary component between the temperature sensor and the structure. This thermal shield blocks heat flux from reaching the sensor, allowing the sensor to accurately detect battery temperature without being influenced by thermal conduction through the structure. The thermal shield acts as a thermal barrier that mediates the thermal environment of the sensor.
2Device complexity
If the temperature sensor is placed close to the structure for structural integration, then device complexity is reduced, but temperature detection accuracy deteriorates due to thermal conduction through the structure
Solution Approach 1:
The thermal shield serves as a mediating component that enables close integration of the temperature sensor with the structure while preventing thermal conduction from affecting the sensor. This allows structural integration benefits to be maintained while eliminating the harmful thermal conduction path.
Solution Approach 2:
The harmful thermal conduction path is extracted or removed from the system by introducing the thermal shield. The thermal shield effectively takes out the unwanted heat flux from the equation, allowing the sensor to detect temperature without the interfering thermal conduction through the structure.
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 design effectively decreases the difference between the actual battery temperature and the detected temperature, ensuring more accurate readings and safer charging operations by maintaining a closer temperature correlation, thus preventing battery degradation or unsafe conditions.
Implementation Method 1
a thermal shield element at least partially positioned between the temperature sensor and the structure
Data Source
Figure 1
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AI summary
A battery module (10) includes a battery (100), a structure (200) positioned at least partially around the battery (100), a temperature sensor (300) positioned between the battery (100) and the structure (200), and a directing portion directing a temperature detection range of the temperature sensor (300) toward the battery (100).