Heat Conductive Sheet Thermal Management for Battery Temperature Uniformity
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Solution Overview
Problem
Electronic apparatuses, such as tablet-type computers, face a temperature difference between secondary batteries due to heat generated by components, leading to uneven degradation and reduced service life.
Innovation Solution
A radiator structure incorporating a heat conductive sheet with a heat insulating layer and an infrared ray reflecting layer, where the heat conductive sheet thermally couples the heat generating component to one battery and the second battery is positioned between the heat generating component and the first battery, with the heat insulating layer minimizing heat transfer to the second battery, while the infrared ray reflecting layer prevents infrared radiation from reaching the second battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a heat conductive sheet is used to dissipate heat from heat generating components, then heat dissipation efficiency is improved, but temperature difference between secondary batteries increases causing uneven degradation
Solution Approach 1:
The heat conductive sheet is divided into different regions with different thermal conductivities: a first region with high thermal conductivity for efficient heat dissipation, and a second region with low thermal conductivity for isolating heat from the second battery. This local differentiation allows simultaneous optimization of heat dissipation and temperature uniformity.
Solution Approach 2:
The heat conductive sheet is segmented into multiple functional zones (first region and second region) with distinct thermal properties. This segmentation enables independent control of heat flow paths, allowing heat to be efficiently dissipated from the heat generating component while preventing excessive heat transfer to the second battery.
2Volume of moving object
If the second battery is positioned between the heat generating component and the first battery for compact layout, then device compactness is improved, but heat transfer to the second battery increases causing temperature rise
Solution Approach 1:
The portion of the heat conductive sheet positioned under the second battery (second region) is designed with low thermal conductivity to create a thermal barrier. This local modification allows the second battery to be placed in a compact position between the heat generating component and first battery while preventing excessive heat transfer to the second battery.
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 structure efficiently dissipates heat and reduces temperature differences between batteries, thereby preventing degradation and extending the service life of the batteries.
Implementation Method 1
The heat conductive sheet thermally couples the heat generating component to the first battery
Implementation Method 2
The heat insulating layer is disposed between the heat conductive sheet and the second battery
Implementation Method 3
a part of the heat generated in the heat generating component travels as radiation heat to the second battery
Data Source
AI summary
An electronic apparatus includes a heat generating component, a first battery, a second battery, a heat conductive sheet, and a heat insulating layer. The second battery is disposed between the heat generating component and the first battery. The heat conductive sheet thermally couples the heat generating component to the first battery. The heat insulating layer is disposed between the heat conductive sheet and the second battery.