What's Happening?
The Korea Institute of Machinery and Materials (KIMM) has introduced a groundbreaking spray-based immersion cooling technology for lithium-ion battery packs. This innovation, developed by Dr. Jinsub Kim and his team at KIMM's Heat Pump Research Center,
aims to enhance thermal management and fire safety while significantly reducing the amount of dielectric coolant needed. The system employs a hybrid cooling approach, where dielectric liquid is sprayed onto the tops of battery cells, and the bottom portion remains partially immersed in the same fluid. This method allows for efficient heat removal and improved cooling performance. Testing has shown that the technology maintains cell temperatures below 35°C, crucial for minimizing thermal degradation and preventing thermal runaway. The system reportedly reduces dielectric-liquid consumption by approximately 85%, using only 10-20% of the coolant required by traditional systems.
Why It's Important?
This development is significant for industries relying on lithium-ion batteries, such as electric vehicles and marine battery systems, where weight and safety are critical concerns. The reduced coolant volume not only lowers system costs but also simplifies packaging, making it an attractive option for transportation applications. Additionally, the technology could benefit stationary energy storage systems and data centers, where battery safety is increasingly important. The non-flammable dielectric liquid not only cools the cells but also helps suppress fire propagation, enhancing overall safety. This innovation represents a potential shift in battery cooling technology, offering a more efficient and safer alternative to conventional methods.
What's Next?
KIMM researchers plan to leverage artificial intelligence to identify new dielectric fluids with optimized properties to further enhance cooling performance. This ongoing research is part of South Korea's Ministry of Climate, Energy and Environment's Core Technology Development Project for Energy Demand Management. The technology's application in the maritime industry, particularly for battery-powered ferries and hybrid propulsion systems, could become increasingly important as these sectors continue to grow. The focus will be on improving thermal management, reducing system weight, and mitigating fire risks in next-generation battery architectures.
