Abstract: The present invention provides a method: sending a downlink message to an optical network terminal through a first port of an optical line terminal; receiving, from a second port of the optical line terminal, an uplink message returned by the optical network terminal; obtaining a second time of receiving the uplink message, and obtaining a first time when the uplink message reaches the first port; according to the first time and the second time, obtaining an equalized delay from the second port to the optical network terminal; and after the optical line terminal is switched from the first port to the second port, delivering, by the optical line terminal, the equalized delay from the second port, and performing data communication with the optical network terminal through the second port. In the present invention processing time is decreased to a maximum extent, and stability of the system is improved.

Abstract: Provided is an auto-thermal evaporative liquid-phase synthesis method for cathode material for battery, comprising the following steps: (1) Adding a synthetic raw material of cathode material into a solvent to obtain a mixture A, the synthetic raw material of the cathode material containing lithium source, adding an accelerant into the mixture A, which makes the mixture A achieve a strong auto-thermal reaction to release heat to evaporate the solvent, and obtaining a solid precursor of the cathode material; (2) Drying the precursor, sintering in an atmosphere furnace and obtaining the cathode material. The method is simple in process, low in energy consumption, requirements for equipment and cost, and is applicable to industrial mass production and application. The cathode material obtained through the method is stability in batch, easy to process, low in internal resistance and high in capacity and has an excellent charging and discharging performance.

Abstract: A composite positive electrode material with a core-shell structure for a lithium ion battery consists of a core active material and a shell active material. The core active material is a lithium iron phosphate or a lithium manganate, and the shell active material is a composite lithium iron phosphate with carbon. The carbon is one or more of carbon nanotube, superfine conductive carbon black and amorphous carbon material. The composite positive electrode material includes from 65% to 99% core active material and from 1% to 35% shell active material, based on the total weight of the composite positive electrode material. The composite positive electrode material has stable property and excellent electrochemistry performance. The lithium ion battery made with the material has higher charge-discharge capacity, excellent cycle performance. It can be charged quickly and discharged at high rate. A preparing method for the composite positive electrode material is also provided.