Strategy for opening explosion-proof fans in energy storage containers

In general, using deflagration venting as passive explosion protection in addition to an active system has multiple benefits due to the nature of the battery failure event, which involves a rapid release of flammable gases.

Several competing design objectives for ESS can detrimentally affect fire and explosion safety, including the hot aisle/cold aisle layout for cooling efficiency, protection against water and dust ingress into the enclosure, and the use of larger cells with increased energy density.

Explosion Venting Protection for Battery Energy Storage SystemsBS&B manufactures Ven -SafTM explosion vents for Battery Ene / deflagration event caused by thermal reactions from release andcontainer to safely move the explosion upward and away from t e container. BS&B vents are certified to open at designated burstig

Three installation level tests show that explosion scenarios can occur as prompt ignitions within seconds of cell gas venting or delayed ignitions where gases ignite after a longer duration of accumulation, especially when fire protection systems are actuated.

come projectiles in the event of a deflagration or explosion. The angle of vent panel openings upon actuation also need to be considered, as different angles allow more or less oxygen to enter the enclosure while still retaining the flammable gas and heat within,

For ESS enclosures, as demonstrated by the above example, battery gas mixtures that have greater than 30% hydrogen are difficult to protect with deflagration venting as the sole explosion protection measure due to the high laminar burning velocity.