How to guard against fire in automobile lithium battery

Lithium battery fire protection needs to establish multiple defenses with strategic depth. In addition to the use of non-flammable or non-flammable materials inside the battery to make the battery have substantial safety performance, the first defense on the outside of the battery is to guard against various inducements that cause the battery to overheat and ignite, such as overcharge, short circuit, collision, etc. This requires safety planning for the electrical system. When the first ground is broken (for example, the battery management system fails to block the charging power supply in time), the temperature of the battery rises, the temperature sensor or gas and smoke detectors in the monitoring system should detect the fault in time and give an alarm. The staff solve the problem and eliminate the cause of fire. This is the second defense. When the problem is not resolved in time and the second ground is broken, the battery burns (smoldering) can no longer be guarded. At this time, what the fire fighting system has to do is to confine the burning to the battery box (or box) where the problem occurred (containment) , And can isolate adjacent unfired batteries and equipment, and guard against fire expansion (isolation). Due to the extremely high temperature of the lithium battery after thermal runaway, the existing non-aqueous life-saving agents such as gas and dry powder cannot quickly lower the battery temperature, and the life-saving effect is not very promising. Therefore, setting the battery fire protection policy to controlled burn-down is a more practical method, and the technical economy is relatively strong. This is the third defense. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.