Rigid-flexible hybrid deviation analysis of battery stack assembly based on the Jacobian-Torsor model

Abstract

This manuscript proposes a deviation analysis method based on the Jacobian-Torsor model for the rigid-flexible hybrid deviations in serial assembly. The method establishes the Torsor model to represent the linear and angular deviations induced by the flexible deformation of the hyperelastic aerogel-based thermal insulation pads. Meanwhile, the Jacobian model is constructed to accurately predict the assembly deviations resulting from the combined effects of rigid and flexible deviations. The position deviations of the intermediate plate and the battery side faces are evaluated and utilized to address specific assembly issues in battery stack assembly. The simulation results of the assembly deviations based on this approach align with the production process measurement data, which demonstrates the effectiveness of the proposed method. In addition, the method can be further used to refine the tolerance representation models for various interactions between rigid and flexible components in parallel assembly scenarios.