Now when it comes to new energy vehicles, we are most worried about the safety problem: charging safety, use safety and so on.
Will doubt the safety of new energy vehicles, not only because the understanding of new energy vehicles is not deep, spontaneous combustion events from time to time also deepen people’s concerns, new energy vehicles safety?
New energy vehicle safety issues need to be solved on one side is the new energy vehicle sales in a mess, and on the other side is the new energy vehicle can not be ignored safety issues.
According to the incomplete statistics of typical safety incidents of new energy vehicles in the world from 2011 to July 2016, there were 23 spontaneous combustion accidents, 6 collision accidents, 7 charging accidents, 3 water-related accidents, 6 other accidents and 4 accidents with unknown causes.
New energy vehicle safety problems, we must nip in the bud!
How does the Oems make the battery not burn or explode?
The battery pack of new energy vehicles is a single mechanical assembly composed of one or more battery modules.
Usually, each electric vehicle power supply system consists of multiple battery packs.
As the carrier of the battery module, the battery shell needs to protect the safety of the battery, so it has certain heat insulation and fire resistance.
In addition to combustion caused by external flame, the static placement of the vehicle will also cause thermal runaway, spontaneous combustion and fire due to battery overcharge, short circuit, leakage and other problems caused by imperfect battery system management, incompatible communication, and communication barrier with charging equipment.
GB31467.3-2015 standard has the battery combustion test, overcharge protection test and short circuit protection test: the combustion test is to directly place the battery on the burning gasoline for about 50cm, and the battery will not burn or explode within 2h of combustion.
The experiment was designed to simulate the ability of a car battery not to ignite when exposed to an ignition source.
Overcharge protection and short circuit protection deal with the whole battery system in the case of overcharge and short circuit, so that the battery does not burst or explode on fire.
