South Korean battery manufacturer SK On is advancing its development of immersion cooling technology for electric vehicle (EV) batteries, aiming to enhance thermal management and efficiency.
The company showcased its progress at the InterBattery 2025 trade show, highlighting its collaboration with SK Enmove, a subsidiary specializing in lubricants.
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Immersion cooling involves submerging battery cells directly in a thermal fluid, such as oil, rather than relying on traditional air or liquid circulation around modules. This method is expected to improve heat dissipation and maintain stable operating temperatures, potentially increasing battery longevity and safety.
The approach also requires a wireless battery management system (BMS) to eliminate wiring complications caused by liquid exposure. SK On’s design integrates a chip in each cell that communicates with antennas embedded within the module, allowing for a more compact and efficient battery layout.
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The concept of immersion cooling has been under exploration in the industry for years but has yet to see widespread adoption in mass-market EVs. While high-performance automakers like Rimac have implemented the technology in electric supercars, major automakers such as Ford are still assessing its feasibility for broader applications.
As battery efficiency and safety continue to be key priorities for EV manufacturers, SK On’s work in immersion cooling could play a role in shaping next-generation battery systems.