Battery Pack Temperature Sensing With Fixed Thermal Conduction
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Solution Overview
Problem
Existing battery packs face challenges in accurately and reliably detecting battery cell temperatures due to the use of thermally conductive adhesives with low strength and thermal conductivity, which can lead to inaccurate detection and require additional fixing devices, resulting in material waste and potential system failure.
Innovation Solution
A battery pack design incorporating thermally conductive elements with good thermal conductivity and a fixing function, integrated between temperature sensors and battery cell surfaces, along with through holes in the supporting member to secure the sensors and elements, eliminating the need for dedicated fixing devices and enhancing detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If thermally conductive adhesive is used to improve heat transfer between temperature sensor and battery cell, then thermal conductivity is improved, but mechanical strength and position stability deteriorate
Solution Approach 1:
The patent merges the thermal conduction function and the fixing function into a single integrated component. The fixing device is designed to simultaneously provide mechanical support (fixing) and thermal conduction, eliminating the need for separate thermally conductive adhesive materials and achieving both position stability and heat transfer efficiency.
2Reliability
If additional fixing device is provided to ensure position stability, then reliability is improved, but device complexity and material usage increase
Solution Approach 1:
The fixing device integrates multiple functions (fixing and thermal conduction) into a single component, reducing the number of parts needed. This merging approach maintains position stability while simplifying the overall structure and reducing material usage.
Solution Approach 2:
The fixing device is designed as a multi-functional component that performs both mechanical fixing and thermal conduction. This universal design allows a single component to fulfill multiple roles, reducing device complexity while maintaining reliability.
3Temperature
If thermally conductive adhesive is used, then thermal conduction is improved, but manufacturing precision and position accuracy deteriorate
Solution Approach 1:
The integrated fixing device combines thermal conduction and position fixation in one component, ensuring precise positioning during manufacturing while maintaining effective thermal conduction. The fixed structure eliminates the positioning errors that occur with adhesive-based solutions.
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 provides accurate and reliable temperature detection without additional fixing devices, saving materials and space, while ensuring the thermally conductive elements maintain their position, improving the reliability and accuracy of temperature readings.
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
AI summary
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.