All electric cars by 2030? in Environment & Climate Posted April 15, 2022 · Edited April 15, 2022 by kj35 A fire blanket will do absolutely nothing in a lithium ion fire as oxygen is not needed in an exothermic chemical reaction thermal runaway fire. You may be confusing lithium metal batteries with li ion. Several things are postulated as causes for li ion fires, manufacturing defects, component defect, overcharging etc .but no real cause is pinpointed in the well made well built battery. Yet they still have fires. The very fact that you suggest a fire blanket or think that 40 gallons of petrol which will eventually burn itself out compared to a thermal runaway fire in a tesla battery which could burn or reignite for weeks after shows a lack of understanding this topic.