Battery pack production safety

How do we evaluate the safety risk of a battery pack?

To comprehensively identify the potential risks in the battery pack, we proposed a novel approach to hierarchically evaluate the safety risk of batteries in this study. Based on this method, we can give a grading evaluation of battery inconsistency and provide appropriate battery safety warnings from pack and cell levels.

Can battery pack inconsistency be a safety warning for electric vehicles?

Therefore, the evaluation of battery pack inconsistency accurately can provide safety warning for electric vehicles, which can ensure that faulty single cells can be screened out in time and prevent thermal runaway accidents in EVs.

What happens if a battery pack is not consistent?

Poor consistency can reduce the power performance and service life of battery packs, and even lead to potential safety hazards. For example, inconsistent operating temperatures may deteriorate the consistency of battery packs (Feng et al., 2018c).

Why are battery safety standards so important?

Battery safety standards are constantly being updated and optimized, because current tests cannot fully guarantee their safety in practical applications. This is still a very serious problem, as there are fires in electric vehicles almost every week around the world.

What is a safety risk assessment approach for battery systems?

This study introduces a novel safety risk assessment approach for battery systems, addressing both cell and pack levels with three key indexes. The core of the assessment lies in representing the relative deviation of cell voltages through scatter diagrams across various stages of service life.

Can a battery evaluation system provide a reference for safety warning?

The results reveal that the evaluation system can accurately quantify the degree of inconsistency of battery packs and identify problematic single cells timely, which is able to provide a reference for safety warning in the electric vehicles field. 1. Introduction