PNNL IntelliVent system reduces risk of explosions in outdoor battery cabinets Researchers at the US Department of Energy’s Pacific Northwest National Laboratory (PNNL) have developed a sensor system called IntelliVent that can prevent dangerous conditions from developing in outdoor battery cabinets. Although energy storage systems with cabinet-type enclosures can be advantageous due to capacity, footprint and access, the cabinets leave little room for exhaust fans which would vent flammable gases that can result from failed cells and lead to explosion. IntelliVent is a patent-pending, deflagration-prevention system for cabinet-style battery enclosures. IntelliVent is designed to open cabinet doors intelligently to vent the cabinet interior at the first sign of explosion risk. This functionality provides passive dilution of accumulated flammable gases, minimizing the potential for catastrophic explosion and reducing the risk of personnel injury.