Abstract: A power supply apparatus includes: a slide rail; a slider, where the slider is disposed on the slide rail, and the slider is configured to fasten a to-be-moved apparatus; a drag chain harness groove, where the drag chain harness groove is fastened to the slide rail; and a drag chain harness, where the drag chain harness is disposed in the drag chain harness groove, the drag chain harness includes a fastened end and a movable end, the fastened end is configured to electrically connect to a power supply, the fastened end is fastened relative to the drag chain harness groove, and the movable end is configured to electrically connect to the to-be-moved apparatus.

Abstract: This application provides a fastening apparatus, a vehicle door, a vehicle, and a device, and relates to the mechanical field. The apparatus includes: a multi-stage telescopic member, where the multi-stage telescopic member includes a plurality of components that are slidably sleeved sequentially, a component located at the top is a top component, and the top component is configured to connect to a mobile apparatus, so that the multi-stage telescopic member is extended or retracted as the mobile apparatus moves; and at least one fastening point, where the at least one fastening point is disposed on the multi-stage telescopic member, the at least one fastening point is configured to fasten a harness, one end of the harness is configured to connect to the mobile apparatus, and the other end of the harness is configured to connect to a power supply apparatus.

Abstract: A method and apparatus for detecting a defect on a surface of a cell, including: obtaining an initial image of the surface of the cell by using an image acquisition unit; preprocessing the initial image to obtain at least one image to be detected of the surface of the cell; and inputting the at least one image to be detected into a defect detection neural network model, and obtaining a detection result outputted by the defect detection neural network model, the detection result being used to indicate whether there is a defect on the surface of the cell is described. According to technical solutions, features of the defect in the image may be made prominent, so as to facilitate subsequent detection of the defect detection neural network model; and more features may be extracted from the image, thereby improving the efficiency and accuracy of defect detection.

Abstract: A lower lockpin rotation shaft assembly includes a lower lockpin rotation shaft body, an outer end portion thereof having a first coupler lifting bar hole, an intermediate portion thereof having a connecting key; and a lower lockpin rotation shaft bush, an outer end portion of the lower lockpin rotation shaft bush having a second coupler lifting bar hole, and an inner end portion of the lower lockpin rotation shaft bush being operatively connected to an inner end portion of the lower lockpin rotation shaft body. Further, the present invention further provides a double-side operating coupler and a coupler draft gear having the above lower lockpin rotation shaft assembly. The coupler draft gear further includes two coupler lifting bars and two coupler lifting bar seats.

Abstract: A lower lockpin rotation shaft assembly includes a lower lockpin rotation shaft body, an outer end portion thereof having a first coupler lifting bar hole, an intermediate portion thereof having a connecting key; and a lower lockpin rotation shaft bush, an outer end portion of the lower lockpin rotation shaft bush having a second coupler lifting bar hole, and an inner end portion of the lower lockpin rotation shaft bush being operatively connected to an inner end portion of the lower lockpin rotation shaft body. Further, the present invention further provides a double-side operating coupler and a coupler draft gear having the above lower lockpin rotation shaft assembly. The coupler draft gear further includes two coupler lifting bars and two coupler lifting bar seats.