Battery Pack Temperature Sensing With Integrated Thermal Fixing
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Solution Overview
Problem
Existing battery packs face inaccuracies and reliability issues in temperature detection due to the use of thermally conductive adhesives with low strength and thermal conductivity, which can deform or shift during use, and require additional fixing devices that waste materials and space and eventually fail.
Innovation Solution
A battery pack design with thermally conductive elements that provide both heat transfer and fixing functions, integrated into the battery cell supporting member with through holes to secure temperature sensors, eliminating the need for dedicated fixing devices and enhancing accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If thermally conductive adhesive is used to transfer heat between the temperature sensor and the battery cell surface, then heat transfer is improved, but the adhesive deforms or shifts during use causing detection inaccuracy and reliability problems
Solution Approach 1:
The patent merges the thermally conductive element and the fixing function into a single integrated component. The thermally conductive element itself is designed to provide both heat transfer and positional stabilization, eliminating the need for separate fixing devices. This integration resolves the contradiction by maintaining reliable thermal contact without the deformation and shifting problems of traditional adhesives.
Solution Approach 2:
The patent changes the physical parameters of the thermally conductive element, specifically using materials with higher thermal conductivity (≥3 W/mK) and appropriate mechanical properties. This parameter change allows the element to maintain stable thermal contact and resist deformation under compression, simultaneously improving both detection accuracy and system reliability.
2Stability of the object's composition
If additional dedicated fixing devices are provided to limit the relative positions between the thermally conductive adhesive, temperature sensor and detection part, then positional stability is improved, but materials and space are wasted and the fixing device eventually fails due to aging
Solution Approach 1:
The patent combines the thermally conductive function and the fixing function into a single element. The thermally conductive element is designed with sufficient mechanical strength to maintain positional stability without requiring additional fixing devices. This eliminates the complexity and material waste associated with separate fixing components while maintaining long-term reliability.
Solution Approach 2:
The thermally conductive element is designed to perform multiple functions simultaneously: heat transfer and positional stabilization. This multi-functionality eliminates the need for dedicated fixing devices, reducing device complexity and material usage while maintaining stable relative positions between the temperature sensor and battery cell surface throughout the product lifecycle.
3Ease of manufacture
If existing thermal conductive adhesive is used, then installation is simple, but the thermal conductivity is insufficient (about 2 W/mK) to meet accurate detection requirements
Solution Approach 1:
The patent specifies thermally conductive elements with thermal conductivity of at least 3 W/mK, which is higher than traditional adhesives (about 2 W/mK). This parameter change improves heat transfer efficiency and detection accuracy while maintaining the simplicity of installation through standardized mounting procedures in the battery pack assembly process.
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 solution ensures accurate and reliable temperature detection of battery cell assemblies without additional fixing devices, saving materials and space, and providing a more compact structure while improving the reliability and accuracy of temperature measurement.
Implementation Method 1
the thermally conductive element can transfer the temperature of the battery cell surface to be detected to the temperature sensor
Data Source
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AI summary
The present utility model provides a battery pack, comprising: a housing; a battery cell assembly; a circuit board; and a battery cell supporting member. The battery pack further comprises a temperature detection device. The temperature detection device comprises: a temperature sensor for detecting the temperature of a battery cell surface; and a thermally conductive element disposed corresponding to the temperature sensor, wherein the thermally conductive element is located between the temperature sensor and the battery cell surface, transfers the temperature of the battery cell surface to the temperature sensor, and fixes the position of the temperature sensor relative to the battery cell surface, and wherein the cell supporting member is provided with a through hole corresponding to the position of the temperature detection device, and the through hole allows the temperature sensor and/or the thermally conductive element to be at least partially located in the through hole. The present utility model further provides a temperature detection device for the battery pack. The battery pack and temperature detection device of the utility model can not only reliably and accurately detect the temperature of the battery cell, but also facilitate installation and save costs and space.