Measurement of interlaminar misalignment of laminated battery based on multi angle X-ray projections

A method to measure the misalignment between cathode layers and anode layers of a laminated lithium battery was proposed by using multi angle X-ray projections. By translating and rotating the laminatedbattery, X-ray radiographs were taken from its four corners respectively. The length of the projection was used to calculate the minimum distance from the vertex of the cathode layer to the edge of the corresponding anode layer. In this method, the rotation angle of the battery was arbitrary, effectively reducing the error caused by inaccurate angle control during determination. Besides, this method waseconomic and efficient. As a transition technique from traditional X-ray radiography to online CT, it wasmore in line with the actual needs of industrial production at current stage.