The present invention relates to a manufacturing method of a cooling pipe for a powertrain of an electric vehicle which has excellent heat transfer efficiency in comparison to a conventional technique to markedly improve the cooling efficiency of a powertrain of an electric vehicle, a cooling pipe for a powertrain of an electric vehicle manufactured thereby, and a drive motor and a battery pack case for an electric vehicle having the same. The manufacturing method of a cooling pipe for a powertrain of an electric vehicle comprises: (a) a step of ball-milling aluminum alloy powder and carbon nanotube powder to manufacture composite powder; (b) a step of manufacturing a multilayer billet including the composite powder, wherein the multilayer billet includes a core layer and two or more shell layers enclosing the core layer, the core layer is made of the composite powder or an aluminum alloy, the shell layers except for the outermost shell layer are made of the composite powder, and the outermost shell layer is made of an aluminum alloy; and (c) a step of manufacturing an extrusion material of a pipe shape by extruding the multilayer billet.

    본 발명은 (a) 알루미늄 합금 분말 및 탄소나노튜브 분말을 볼밀링하여 복합 분말을 제조하는 단계; (b) 상기 복합 분말을 포함하는 다층 빌렛(billet)을 제조하되, 코어층 및 상기 코어층을 둘러싸는 2층 이상의 쉘층을 포함해 이루어지며, 코어층은 상기 복합 분말 또는 알루미늄 합금으로 이루어지고, 최외곽 쉘층을 제외한 쉘층은 상기 복합 분말로 이루어지며, 최외곽 쉘층은 알루미늄 합금으로 이루어지는 것을 특징으로 하는 다층 빌렛을 제조하는 단계; 및 (c) 상기 다층 빌렛을 압출해 파이프 형상의 압출재를 제조하는 단계;를 포함하는 전기 자동차의 파워트레인용 냉각 파이프의 제조방법, 이에 의해 제조된 전기 자동차 파워트레인용 냉각 파이프 및 이를 구비하는 전기 자동차용 구동 모터 및 배터리팩 케이스에 대한 것이다.


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    Title :

    METHOD FOR MANUFACTURING COOLING PIPE FOR ELECTRIC VEHICLE POWERTRAIN AND COOLING PIPE MANUFACTURED THEREBY


    Additional title:

    전기 자동차의 파워트레인용 냉각 파이프의 제조방법 및 이에 의해 제조된 냉각 파이프


    Contributors:

    Publication date :

    2021-09-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B22F Verarbeiten von Metallpulver , WORKING METALLIC POWDER / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES




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