Title:
METHOD FOR MANUFACTURING COOLING PIPE FOR ELECTRIC VEHICLE POWERTRAIN, AND COOLING PIPE MANUFACTURED THEREBY
Document Type and Number:
WIPO Patent Application WO/2021/215575
Kind Code:
A1
Abstract:
The present invention relates to a method for manufacturing a cooling pipe for an electric vehicle powertrain, a cooling pipe for an electric vehicle powertrain manufactured thereby, an electric vehicle driving motor including same, and a battery pack case, the method comprising the steps of: (a) ball milling aluminum alloy powders and carbon nanotube powders to prepare composite powders; (b) preparing a multilayer billet containing the composite powders such that the multilayer billet including a core layer and at least two shell layers surrounding the core layer, wherein the core layer is formed of the composite powders or aluminum alloy, the shell layer except for the outermost shell layer is formed of the composite powders, and the outermost shell layer is formed of an aluminum alloy; and (c) extruding the multilayer billet to prepare an extruded material having a pipe shape.
Inventors:
KWON HAN SANG (KR)
Application Number:
PCT/KR2020/006660
Publication Date:
October 28, 2021
Filing Date:
May 21, 2020
Export Citation:
Assignee:
NAT UNIV PUKYONG IND UNIV COOP FOUND (KR)
International Classes:
B22F5/10; B22F3/105; B22F3/20; B22F9/04; B22F9/24; B60K1/00; B60K11/00
Foreign References:
| KR101822073B1 | 2018-01-26 | |||
| JP2006315893A | 2006-11-24 | |||
| KR20110085978A | 2011-07-27 | |||
| CN105734459A | 2016-07-06 | |||
| US20070141315A1 | 2007-06-21 |
Attorney, Agent or Firm:
KIM, Jung Su (KR)
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