Abstract: A conveying device suitable for conveying objects, wherein the conveying device can slide on at least two truss beams of the truss of passenger conveying device; setting said objects to be transported on the conveying device; the conveying device can move from a first position to a second position different from the first position along the length of the truss of the passenger conveying device, thereby conveying said objects to be transported from the first position to the second position; there is a height difference between the first position and the second position, or there is no height difference between the first position and the second position; wear-resistant components made of wear-resistant material are arranged on the conveying device; the wear-resistant components are frictionally sliding on the truss beam; the object to be transported is an upper module of the passenger conveying device and/or a lower module of the passenger conveying device.

Abstract: The present disclosure provides a method for diagnosing an internal short circuit of a battery based on a relaxation voltage, including: 1) acquiring a relaxation voltage curve of each cell in a battery after a current is unloaded under same conditions of the battery; 2) extracting features from the relaxation voltage curve of each cell to obtain corresponding curve features; and 3) determining whether the internal short circuit occurs in the cell according to curve features, thereby completing diagnosis. The present disclosure has the advantages of short detection time and high accuracy over the prior art.