The invention belongs to the technical field of batteries, and discloses a
battery pack, a sealing structure and a design method thereof, and the method comprises the steps: obtaining three-dimensional
point cloud data of a sealing interface of the
battery pack through a three-dimensional
scanner, constructing a digital twin model, importing constitutive parameters of a sealing material, recognizing a curvature
mutation region, executing differential grid division, and generating a
compression ratio distribution cloud picture. Marking the early warning coordinates of which the
compression ratio is lower than a set threshold value; calculating a local thickness increment by adopting a gradient
compensation algorithm based on the geometrical characteristics of the early warning coordinates to construct gradient thickness sealing
gasket parameters; a gradient thickness sealing
gasket with a built-in
pressure sensing film is manufactured through 3D printing equipment, and the gradient thickness sealing
gasket is assembled to the entity
battery pack for a multi-working-condition sealing test;
dynamic pressure distribution data and a
leakage rate curve in a multi-working-condition sealing test are collected, an LSTM neural network is trained to construct a time-varying aging prediction model, an anti-aging thickness compensation
coefficient matrix is output, and the design reliability of the battery pack sealing structure is improved.