Battery Swelling Estimation Using Shape Change Mode Detection

The patent applies preliminary action by performing pressing treatment on cells before assembling them into modules. This pre-compression prevents subsequent swelling from causing module breakage, thereby improving reliability while maintaining ease of manufacture. The pressing treatment is conducted as a preliminary step before the cells are installed in the module, proactively preventing the swelling problem.

The patent replaces mechanical swelling detection units with an estimation device that uses calculation and analysis methods. Instead of attaching physical sensors to detect swelling, the system estimates shape changes by analyzing operational data and comparing against predetermined thresholds. This substitution reduces device complexity while maintaining reliability through intelligent estimation rather than mechanical detection.

The patent applies preliminary action by pre-storing expansion coefficients and shape change thresholds that are determined through prior research on physical phenomena. Instead of conducting extensive research at the time of measurement, the necessary experimental data and models are prepared in advance. This allows rapid, precise estimation of shape changes during actual operation without repeating time-consuming research, thus improving measurement precision while minimizing time loss.