Since the national policy has clearly required that automobile power battery cells should not catch fire or explode within 5 minutes after thermal runaway, allowing safe escape time for the occupants. Major battery suppliers and car companies have made great efforts. For example, BYD is committed to optimizing the structure of the original safe lithium iron phosphate battery and increasing the energy density, which is what we call blade. Battery.
Recently, Xpeng Motors applied to the State Intellectual Property Office for a patent on a thermal runaway protection method for electric vehicles. When the vehicle suffers from thermal runaway, it can extinguish the fire of the power battery assembly.
Judging from this structure, the patent mainly monitors the power battery through sensors. Once it is found that the battery is thermally out of control and causes a fire, the fire extinguishing device will be activated to extinguish the fire and nip the danger in the bud; if there is no Misfires will also be fed back to the cloud center. Overall, this design structure is not complicated, but it is not easy either. Because it involves the safety of drivers and passengers, it also requires a large amount of experimental data and repeated verification of feasibility and durability. It may not be available in a short time. mass production within.
If it is mass-produced in the future, Xpeng Motors will definitely gain the favor of more consumers, thereby promoting sales growth. Of course, it will also make other car companies pay more attention to the safety of power batteries. effort.
It is worth mentioning that after watching some videos of electric cars catching fire, many friends will say that it only takes a few seconds. How easy is it to reach 5 minutes? In fact, the thermal runaway of the single battery mentioned is not the same thing as the fire we have seen. As long as there is a complete monitoring system to remind passengers, there will be enough time for the people in the car to escape, so there is no need to Worry too much. Of course, it would be best if there is no problem with the battery, or if the car itself can contain the battery thermal runaway.
This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.