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Graphite aluminum high-thermal-conductivity module with low longitudinal thermal resistance

A high thermal conductivity, vertical technology, applied in cooling/ventilation/heating transformation, modification by conduction heat transfer, electrical components, etc., can solve the problems of graphite aluminum application restriction, slow heat transfer, etc., to improve the longitudinal thermal conductivity, enhance Thermal conductivity, the effect of reducing longitudinal thermal resistance

Active Publication Date: 2021-09-24
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the longitudinal thermal conductivity of graphite aluminum along the thickness of the material is only 30-50w / m·k, the heat transfer along the thickness direction of graphite aluminum is very slow, and the material characteristics of graphite aluminum make its application severely restricted.

Method used

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  • Graphite aluminum high-thermal-conductivity module with low longitudinal thermal resistance
  • Graphite aluminum high-thermal-conductivity module with low longitudinal thermal resistance
  • Graphite aluminum high-thermal-conductivity module with low longitudinal thermal resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] as attached figure 1 As shown, it is a schematic diagram of the box body shape of a graphite aluminum high thermal conductivity module with low longitudinal thermal resistance provided in this embodiment. Station Q, a high thermal conductivity interlayer 102 is embedded inside the box body 101, locking strips 201 are provided on both sides of the box body 101, and the back side of the locking strips 201 on the box body 101 is the external heat exchange surface F of the box body. The heat conduction interlayer is not fully covered inside the box body, and the external heat exchange surfaces F on both sides are not fully covered with high heat conduction structures.

[0026] The upper boss Q of the box body 101 is a part in contact with the heat generating device, and the heat generating device transfers heat to the graphite aluminum high thermal conductivity module through the boss Q. The back side F of the locking bar 201 on the box body 101 is the outer heat exchange ...

Embodiment 2

[0031] as attached Figure 4 As shown, it is a schematic diagram of a comparison test of thermal conductivity of a graphite aluminum high thermal conductivity module with low longitudinal thermal resistance provided in this embodiment, a graphite aluminum high thermal conductivity module with graphite aluminum covering the entire module area, and a module made of pure aluminum alloy.

[0032] The external dimensions of the three modules A, B, and C are exactly the same, and the module A is the graphite aluminum high thermal conductivity module with low longitudinal thermal resistance provided by embodiment 1. Module B is a graphite aluminum high thermal conductivity module with graphite aluminum covering the entire module area. Module C is a module made of pure aluminum alloy. The heat test positions of the three modules are points QA1~QC3 in the figure, the heat loading position is the boss corresponding to the test point, and the external heat exchange surface of the module...

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Abstract

The invention discloses a graphite aluminum high-thermal-conductivity module with low longitudinal thermal resistance, which comprises a box body and a plurality of upper bosses arranged on the upper surface of the box body, a high-thermal-conductivity interlayer is embedded in the box body, locking strips are arranged on two sides of the box body, and the back side surfaces of the locking strips of the box body are external heat exchange surfaces of the box body. The module is characterized in that the high-heat-conduction interlayer is not fully paved in the box body, and the external heat exchange surfaces on the two sides are not fully paved with high-heat-conduction structures. According to the graphite aluminum high-thermal-conductivity module, the structure of an existing graphite aluminum high-thermal-conductivity module is improved, longitudinal thermal resistance is reduced, the longitudinal thermal conductivity of the graphite aluminum high-thermal-conductivity module is improved, and the overall thermal conductivity of the graphite aluminum high-thermal-conductivity module is enhanced.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a graphite aluminum high thermal conductivity module with low longitudinal thermal resistance. Background technique [0002] Graphite aluminum is a material with excellent thermal conductivity. It is a composite material formed by fully mixing high thermal conductivity graphite into molten aluminum alloy. Microscopically, graphite is mixed into aluminum alloy in the state of a certain length of graphite chain, so the thermal conductivity of graphite aluminum along different directions in space is different, and the thermal conductivity along the length direction of graphite chain will be significantly higher than other directions. Macroscopically, the thermal conductivity of graphite aluminum in the horizontal plane can be as high as 700w / m·k, but the thermal conductivity along the longitudinal direction of the material thickness is only 30-50w / m·k. [0003] The elec...

Claims

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Application Information

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IPC IPC(8): H05K7/20
CPCH05K7/2039H05K7/20436H05K7/20445H05K7/20481
Inventor 程皓月刘芬芬尹本浩白宗旭叶元鹏刘彦强
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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