Abstract: A protective cover assembly includes a cage and an elevated cover. The cage includes a mating end surface, a first mating space and a first top wall. The first mating space extends through the mating end surface along a first direction. The first top wall includes a first opening extending along the first direction. An end of the first opening extends through the mating end surface. The elevated cover includes a first end surface and a second mating space extending through the first end surface along the first direction. The elevated cover is stacked on the cage along a second direction perpendicular to the first direction, and the first mating space communicates with the second mating space. A receptacle connector assembly and a connector assembly having the protective cover assembly are also disclosed.

Abstract: A protective cage assembly includes a cage and a light guide pipe. The light guide pipe includes an input surface, an output surface and a main body portion extending between the input surface and the output surface. The main body portion includes a first portion and a second portion. The first portion is located inside the cage. The second portion is located outside the cage. The first portion is located adjacent to an inner wall of the cage, and extends along the inner wall of the cage at least to a mating end face of the cage. Besides, a receptacle connector and a connector assembly having the protective cage assembly are also disclosed.

Abstract: Embodiments of this application disclose an arc detection method for performing protection in an energy storage system, and a related apparatus, to improve accuracy of arc detection in an energy storage system, promptly take an arc extinguishing measure, and reduce a probability of causing a safety hazard. The method in the embodiments of this application includes: A control apparatus obtains an electrical signal at an electrical connection point in an energy storage system. The control apparatus determines a frequency domain amplitude based on a frequency domain characteristic of the electrical signal. When the frequency domain amplitude is greater than a preset amplitude, the control apparatus controls the energy storage system to perform an arc extinguishing and protection operation on the electrical connection point.

Abstract: A roller train and a substrate conveying device are provided. The roller train is used for a substrate and includes a first roller including a first delimitation part, and a second roller including a second delimitation part. An axial line of the first roller is parallel to that of the second roller; the first roller and the second roller contact an upper surface and a lower surface of the substrate, respectively; and, the first delimitation part and the second delimitation part are arranged on the first axis and the second axis, respectively, and configured to delimit axial displacement of the first roller and the second roller, respectively. The first delimitation part and the second delimitation part cooperate to prevent misalignment between the first roller and the second roller.

Abstract: A roller train and a substrate conveying device are provided. The roller train is used for a substrate and includes a first roller including a first delimitation part, and a second roller including a second delimitation part. An axial line of the first roller is parallel to that of the second roller; the first roller and the second roller contact an upper surface and a lower surface of the substrate, respectively; and, the first delimitation part and the second delimitation part are arranged on the first axis and the second axis, respectively, and configured to delimit axial displacement of the first roller and the second roller, respectively. The first delimitation part and the second delimitation part cooperate to prevent misalignment between the first roller and the second roller.