The UK’s Civil Air travel Authority (CAA) has actually appointed College of Warwick to examine exactly how battery qualities can influence thermal runaway threat, and finish a testimonial of lithium-ion battery firefighting approaches The record provides a combined proposition for rescue and fire combating personnel to deal with thermal runaway (TR) discharges to eVTOL airplane batteries.
” High cost and discharge prices, specifically appropriate for the functional demands of eVTOL, raise the possibility and seriousness of TR,” stated the record. “When a cell is chosen, the TR threat of an eVTOL airplane battery pack/system mainly relies on the layout selections to alleviate cell TR proliferation to adjoining cells, and if proliferation takes place, control. Present governing standards, i.e. RTCA DO-311A and EASA MOC VTOL.2440 emphasise quiting the cell TR proliferation and control of TR within the battery room if cell TR circulates.
” Sticking purely to these demands, incorporated with normal tracking and upkeep, is anticipated to reduce the possibility of cell TR and its proliferation. Nonetheless, severe situations arising from problems past the screening and qualification envelope can not be gotten rid of. Various misuse situations, such as a harmed battery room and pack because of an unrestrained touchdown, or fire stemming from a non-battery part, might result in an uncontained battery pack TR. In such a circumstance, the Rescue and Fire Battling Solution (RFFS) employees at an airport/vertiport requirement to react and handle the case.”
Typical approaches of firefighting at events entailing gas powered lorries do not put on EVs, stated the record. “There is no solitary approach which can be gotten any type of EV battery thermal runaway; it relies on different elements. Present EV firefighting approaches are properly made up of 2 techniques: proactively snuffing out the fire and taking care of the fire while enabling regulated shed. Immersion or swamping the battery loads with cooling down media e.g. water to proactively have a TR occasion have actually been utilized. To prevent reignition and extremely contaminated materials from the run-off, firemens might take into consideration utilizing a regulated shed of the battery pack, while separating the car to avoid the fire from infecting the environments. This technique has actually obtained substantial interest, as it supplies one of the most reliable, quickest, and least expensive effect on the atmosphere. It likewise gets rid of the reignition threat and much less dangerous particles.”
To learn more
https://www.caa.co.uk/our-work/publications/documents/content/cap3203/
发布者：Philip Butterworth-Hayes，转转请注明出处：https://robotalks.cn/uks-caa-publishes-a-report-on-managing-thermal-runaway-evtol-battery-fires/
