Explosion-proof battery pack level

How to assess risk and hazard of battery explosion?

According to the characteristic of parameters, the sensitivity and severity were taken as two indicators to evaluate the risk and hazard of battery explosion. Moreover, a safety assessment method was proposed based on the two indicators.

What happens if a battery pack explodes?

A battery pack for EVs consists of many battery cells that connected series and parallel. When a single cell catches fire or explodes, a “domino effect” will be triggered and propagate through the entire battery pack , posing a huge threat to the vehicle and the personal safety of passengers.

How can battery safety management prevent explosion and fire?

From the perspective of battery safety management, we can prevent the occurrence of explosion and fire by removing and isolating the air in the automotive application. After passing the negative maximum pressure (P−max = 0.448 MPa), the pressure rose sharply and reached the positive maximum pressure (P＋max = 0.997 MPa) in less than a second.

What is the study of battery explosion?

Therefore, the study of battery explosion needs to comprehensively consider the gas and heat production as well as its mechanical impact on the external environment. The goal is to propose effective targeted prevention and control strategies in automotive applications.

Are explosion-proof cells safe?

While the cells enclosed in an explosion-proof box are considered to be safe, there are reports that the thermal runaway propagation from a single cell will ignite the space within the enclosure to a pressure far beyond its limit [12, 18, 19].

How are explosion protection devices assessed?

For the purpose of explosion protection, devices are assessed on the basis of the zones in which they are to be used. For Zone 2, the device is deemed "safe" if no potential source of ignition exists under normal operating conditions.