The use of copper in contact with vehicle engine coolants remains a vehicle OEM requirement in the formulation of inhibitors for modern engine coolants such as BASF’s Glysantin® G40®. Battery electric or hybrid vehicles may use copper coolers in their power electronic modules and aluminum coolers in their battery packs. This study compares the use of bare copper and nickel-plated copper coolers in an EV cooling system. An industry accepted inhibitor aging test was applied to a flowing cooling system composed of aluminum battery coolers and copper power electronic coolers. Inhibitor aging was aggravated by reducing the quantity of coolant relative to the copper and aluminum surface areas, and by lengthening the exposure time to 3000 hrs. Ionic concentration of copper, nickel, and all metals, remained below the 3ppm limit of detection confirming the inhibitor package protects for the use of both bare and nickel-plated copper power electronic coolers.
Automotive Coolant Inhibitor Protection of an EV Cooling System Having Copper and Aluminum Heat Exchangers
Sae Technical Papers
SAE WCX Digital Summit ; 2021
2021-04-06
Conference paper
English
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