Two-Phase Immersion Cooling for Cylindrical Geometry Energy Storage Components

Thermal Management Technologies proposes to develop concept designs for a scalable two-phase liquid-vapor immersion cooling system and perform a subscale proof of concept demonstration of the technology. Direct immersion cooling is capable of providing thermal management of individual cells whether in the cylinder, prismatic, or pouch configuration and maintaining a very nearly uniform temperature distribution among all cells. The proposed design, which employs a high quality dielectric working fluid in direct contact with the energy storage components, will be shown to provide effective thermal management of cylindrical components without decreasing their packing density. Overcoming the deficiencies of existing cooling approaches, the proposed system provides efficient thermal coupling between energy storage components and a cold sink by utilizing the very high boiling and condensation heat transfer coefficients of the working fluid. This eliminates the inefficiencies of conduction through interface materials or electrical connection terminals. An automatic degas module is proposed to simplify assembly, fluid filling, and maintenance procedures and maintain the working fluid in a saturated state.