Method for improving bending resistance of flexible electrochemical energy storage device of sandwich structure

The invention discloses a method for improving the bending resistance of a flexible electrochemical energy storage device of a sandwich structure, and the method comprises the steps: adopting a linearobject to sew the flexible electrochemical energy storage device of the sandwich structure, i.e., sewing the assembled energy storage device in one of a transverse mode, a longitudinal mode and an oblique line mode or more by using a needle. According to the method, on the one hand, the electrolyte fixing effect is achieved, and the local thinning phenomenon is prevented; on the other hand, the electrolyte is attached to the two electrodes to prevent interface separation. According to the invention, the flexible electrochemical energy storage device is sewn by utilizing the non-conductive andnon-reactive macroscopic lines, so that the two problems of short circuit and poor interface contact in the bending process are solved. The method is simple to operate and low in cost, improves the bending resistance of the f