Abstract: The present disclosure relates to the field of sodium ion battery technology, in particular, to a cathode material, a preparation method thereof, and a sodium ion battery. The present disclosure relates to a cathode material including a Prussian Blue substrate, and a first coating layer and a second coating layer successively coated on the surface of the Prussian Blue substrate; a material forming the first coating includes a polymer of tannic acid; a material forming the second coating layer includes at least one of hexadecylamine, octadecylamine, octadecyl phosphate, N-phenyl-bis(trifluoromethanesulfonimide), 1H,1H,2H,2H-perfluorodecyl triethoxysilane, and 1H,1H,2H,2H-perfluorodecanethiol. The cathode material of the present disclosure effectively solves the problem of hygroscopicity of Prussian Blue cathode material and effectively improves the storage property and electrochemical performance of the cathode material in air.

Abstract: The present invention provides an OBD interface bus type detection method and apparatus. The method includes: determining a first bus feature of a connection cable associated with a selected pin in an on-board diagnostics OBD interface; matching the first bus feature with an OBD interface bus library and determining a bus type of the connection cable associated with the selected pin; determining, according to the bus type of the connection cable associated with the selected pin, a second bus feature of the connection cable associated with the selected pin; and sending the second bus feature to a vehicle diagnostic instrument, to enable the vehicle diagnostic instrument to perform communications protocol scanning on the selected pin in the OBD interface according to the second bus feature.

Abstract: The present invention provides an OBD interface bus type detection method and apparatus. The method includes: determining a first bus feature of a connection cable associated with a selected pin in an on-board diagnostics OBD interface; matching the first bus feature with an OBD interface bus library and determining a bus type of the connection cable associated with the selected pin; determining, according to the bus type of the connection cable associated with the selected pin, a second bus feature of the connection cable associated with the selected pin; and sending the second bus feature to a vehicle diagnostic instrument, to enable the vehicle diagnostic instrument to perform communications protocol scanning on the selected pin in the OBD interface according to the second bus feature.