Battery Design and Safety Ratings Handbook

This document outlines a set of rigorous tests aimed at aiding battery manufacturers in evaluating and classifying their battery products based on safety and design excellence. It is important to note that while these tests provide valuable insights, they may not comprehensively determine the overall safety of a product. Instead, they serve as a means to compare various qualities of Li-ion battery packs. Traditional standards such as AIS or UL often include tests like nail penetration at full charge, but these may not offer comprehensive information on design flaws. Some standard tests have binary pass/fail criteria, limiting manufacturers in their ability to develop improvement strategies. Furthermore, the same battery can pass certain tests under specific conditions and fail when manufacturing processes change. Consequently, relying solely on standards such as AIS-048 and AIS-156 may not always be the most effective guide for assessing the overall quality of a designed battery product.