DIELECTRIC DETECTION FOR IMMERSION COOLED AUTOMOTIVE BATTERY SYSTEM

An automotive battery system for electrified vehicles is presented. The system includes a traction battery with arrays submerged in cooling fluid, and a pump circulating the fluid. The pump includes circuitry configured to detect current flow through the cooling fluid from the traction battery to the circuitry, indicating fluid contamination or isolation faults. This circuitry may be coupled with either high or low voltage pumps. A battery management system receives data from the circuitry, reports contamination levels, and may trigger responses including disabling arrays or adjusting charging rates.