Abstract: The present application provides a method for preparing a prelithiated positive electrode current collector, the method comprising the following steps: gasifying a lithium source in an evaporation chamber filled with a protective gas; enabling an aluminum foil layer to pass through the evaporation chamber and depositing the metal lithium on a surface of the aluminum foil layer by means of vapor deposition; and transferring the aluminum foil layer deposited with the metal lithium to an annealing chamber filled with a protective gas and performing high-temperature annealing to form a lithium-aluminum alloy layer on the surface of the aluminum foil layer.

Abstract: Disclosed are a photovoltaic energy storage offline coordination system and method based on demand management. The system includes a photovoltaic generator set, an inverter, a dispatch and control device for charge-discharge, a load monitor, a first and second energy storage device, and a remote console. The photovoltaic generator set is electrically connected to the dispatch and control device for charge-discharge via the inverter; the first energy storage device is connected to a load-side power supply bus via a first dispatch and control unit; the second energy storage device is connected to the load-side power supply bus via a third dispatch and control unit; a second dispatch and control unit is connected to the load-side power supply bus; the load monitor is provided at the load-side power supply bus, and configured to monitor a load of the load-side.

Abstract: Provided are a video call method and apparatus, an electronic device and a storage medium. The method includes: displaying a video call page; in response to receiving a first trigger operation using a first target special effect, determining a first action object of the first target special effect; in response to determining that the first action object includes a target peer user, sending a special effect request to a server to request an acquisition of a first special effect image where the first target special effect is added, where the first special effect image is used for being displayed at a client of at least one user; and in response to receiving the first special effect image forwarded by the server, updating a first video call image displayed in a first display region corresponding to the target peer user as the first special effect image.

Abstract: The present invention relates to an automatic testing apparatus, which comprises a device under test and a testing module. The device under test has a testing program and includes a plurality of functional modules. The testing module is coupled to the device under test. The device under test executes a testing program and communicates with the testing module so that the testing module can test the plurality of functional modules of the device under test. By adopting automatic testing, no tester is needed for performing testing. Thereby, the personnel cost can be reduced and the total testing time can be shortened.

Abstract: The present invention relates to an automatic testing apparatus, which comprises a device under test and a testing module. The device under test has a testing program and includes a plurality of functional modules. The testing module is coupled to the device under test. The device under test executes a testing program and communicates with the testing module so that the testing module can test the plurality of functional modules of the device under test. By adopting automatic testing, no tester is needed for performing testing. Thereby, the personnel cost can be reduced and the total testing time can be shortened.