Thermoelectric Module Thermal Interface for Precise Temperature Sensing
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Solution Overview
Problem
Current thermoelectric modules face challenges in achieving high precision temperature control due to limitations in temperature detection accuracy.
Innovation Solution
The integration of a thermal transfer member on the substrate and chip thermistor with improved thermal conductivity, including a larger contact area, smooth surface, and specific shapes such as truncated-cone or cylinder, along with the use of conductive and insulating materials to enhance heat transfer and prevent electrical short circuits, while also ensuring secure bonding and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature detector is mounted directly on the substrate, then the device complexity is reduced, but the temperature detection accuracy is insufficient
Solution Approach 1:
A thermal transfer member is introduced as an intermediary component between the substrate and the temperature detector. This member has high thermal conductivity to efficiently transfer temperature information from the substrate to the detector, thereby improving measurement accuracy without requiring direct contact that would complicate the mounting structure.
Solution Approach 2:
The thermal transfer member is constructed using composite materials that combine high thermal conductivity with appropriate mechanical properties for bonding. This allows efficient heat transfer while maintaining structural integrity and ease of integration into the existing substrate-detector assembly.
2Measurement precision
If the contact area between temperature detector and substrate is increased, then the temperature detection accuracy is improved, but the area available for other components is reduced
Solution Approach 1:
The thermal transfer member acts as a mediator that amplifies the effective thermal contact area. By providing a dedicated thermal interface layer, it enables sufficient thermal coupling between the detector and substrate without requiring the detector itself to occupy a larger substrate area, thus preserving space for other components.
3Measurement precision
If a thermal transfer member is introduced to improve thermal conductivity, then the temperature detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The thermal transfer member is designed to perform multiple functions simultaneously: it provides high thermal conductivity for accurate temperature detection, serves as an adhesive layer for secure bonding between the detector and substrate, and can incorporate electrical insulation properties to prevent short circuits. This multi-functionality reduces the need for separate components.
Solution Approach 2:
By using composite materials in the thermal transfer member, multiple functional properties (thermal conductivity, adhesion, electrical insulation) are integrated into a single component, thereby improving temperature detection accuracy without proportionally increasing the number of discrete parts in the assembly.
4Measurement precision
If conductive materials are used to enhance heat transfer, then the thermal conductivity is improved, but the risk of electrical short circuits increases
Solution Approach 1:
The thermal transfer member utilizes composite materials that combine thermally conductive fillers (such as metal particles or ceramic compounds) within an electrically insulating matrix (such as polymer or resin). This composition enables efficient heat transfer from the substrate to the temperature detector while the insulating matrix prevents electrical current flow, thereby eliminating the short circuit risk associated with purely conductive materials.
Solution Approach 2:
The composite material structure provides different properties in different phases: the conductive filler particles create thermal conduction pathways, while the insulating matrix maintains electrical isolation. This local differentiation of properties allows simultaneous achievement of high thermal conductivity and electrical insulation within the same component.
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 configuration enhances thermal conductivity, improves temperature detection accuracy, and prevents electrical short circuits, enabling high precision temperature control and increased durability of the thermoelectric module.
Implementation Method 1
a temperature detector disposed on the first surface or a second surface of the first substrate via a thermal transfer member
Implementation Method 2
A thermoelectric module which uses the Peltier effect is used as a temperature control module because one end of the thermoelectric module generates heat and the other end of the thermoelectric module absorbs heat when an electric current is passed through the module
Data Source
AI summary
Disclosed is a thermoelectric module, including: a first substrate; a plurality of thermoelectric elements arranged on a first surface of the first substrate; and a temperature detector disposed on the first surface or a second surface of the first substrate via a thermal transfer member.