Abstract: Disclosed are a homogeneous silicon carbide material and an electrode plate and a battery that include the homogeneous silicon carbide material. A negative electrode plate in the battery of the present disclosure includes a homogeneous silicon carbide material. The homogeneous silicon carbide material includes an element Si and an element C. The homogeneous silicon carbide material is a homogeneous material and has a bi-continuous phase structure. The homogeneous silicon carbide material in the present disclosure has better cycling performance and higher specific capacity.

Abstract: Disclosed are a negative electrode plate, an electrochemical energy storage apparatus and an electronic apparatus comprising the negative electrode plate. A negative electrode active material of the negative electrode plate includes a first amorphous carbon material. An interlayer spacing d002 of the first amorphous carbon material is greater than 0.34 nm, and an average pore diameter of pores of the first amorphous carbon material ranges from 2 nm to 20 nm. The negative electrode plate can help improve energy density of a lithium-ion battery and suppress expansion of an electrochemical energy storage apparatus during cycling.

Abstract: The present disclosure provides a negative electrode sheet and a lithium-ion battery including same. A negative electrode active material, a conductive agent, a binder, and an auxiliary agent (a compound represented by Formula 1) are used in the negative electrode sheet of the present disclosure, the above substances are dissolved in a solvent, uniformly mixed, and coated on a surface of a negative electrode current collector, after drying, the negative electrode sheet of the present disclosure can be obtained. The auxiliary agent (the compound represented by Formula 1), due to its small molecular weight and short polymer chain segment, can be fully mixed with the negative electrode active material, conductive agent, and binder.

Abstract: Disclosed is an electrokinetic-aeration-liquid injection combined remediation method for compound contaminated soil containing heavy metals and organic substances, and belongs to the field of contaminated soil remediation. According to the present application, in the combined remediation method, the electrokinetic remediation method enables water in soil to migrate from bottom to top to drive heavy metals and organic substances to be enriched towards the top; bubbles generated by the aeration method are diffused from the bottom to the top to drive volatile organic compounds to move towards the top soil. During liquid injection process, the electrolyte is driven to move from bottom to top under the action of electrokinetic remediation flow, which can keep the pH of the soil stable and remediate heavy metals and organic pollutants. The whole processes are simultaneously completed by adopting the dual-channel porous EKG electrode designed by the present application, which is efficient and convenient.

Abstract: Disclosed are a positive electrode plate and a lithium-ion battery including the positive electrode plate. The positive electrode plate includes a positive current collector, a safety coating layer, a composite fusion layer, and a positive active material layer; the safety coating layer comprises a first conductive agent, a first binder, a functional microsphere, and an auxiliary agent. The safety coating layer has conductive performance at normal temperature, and has the advantages of increasing a contact area between an active material and the current collector, improving the electrical conductivity, and effectively reducing polarization of the battery; when the use temperature of the positive electrode plate reaches 120° C. or above, the functional microsphere will be melted to form a plurality of continuous electron blocking layers, the coating layer blocks current, internal blocking is formed inside the battery, and the occurrence of further thermal runaway of the battery is prevented.

Abstract: A negative electrode piece and a secondary battery including the same. A type of polymer different from that in the prior art is selected as a component in the negative electrode piece, the polymer has high elasticity, high extensibility, can replace the polymer in the existing negative electrode piece, and can effectively improve and enhance the transmission performance of lithium ions and reduce the internal resistance of the lithium-ion battery. At the same time, it can effectively reduce side reactions caused by the expansion of the negative electrode piece, improve lithium conductive channels inside the negative electrode piece, and improve battery performance of the negative electrode piece during the battery cycling.

Abstract: A positive electrode piece and a secondary battery including the same. By selecting a type of polymer electrolyte prepared from a polymer different from that in the prior art as the solid electrolyte in the positive electrode piece, the solid electrolyte have both a bonding function and a lithium conduction function, may replace a binder and a solid electrolytes in an existing electrode piece, can effectively improve and enhance the lithium ion transmission performance, and reduce the internal resistance of the battery. Meanwhile, the positive electrode piece including the solid electrolyte has a low porosity, below about 5%, which greatly reduces voids and holes in the positive electrode piece, increases the content of the positive-electrode active material in unit volume, improves the transmission of lithium ions and electrons, and effectively improves the energy density, cycling performance and rate performance of the battery.

Abstract: Disclosed is a sludge three-dimensional electroosmosis drainage reinforcing method based on a novel electric geotextile complex, and belongs to the field of soft soil foundation reinforcement. A novel electric geotextile complex is adopted, and a designed multidirectional three-dimensional continuous electroosmosis drainage method is adopted to perform rapid drainage reinforcement treatment on sludge, wherein the electric geotextile complex is prepared by combining fibers and conductive materials with a flexible drainage plate and has the effects of electric conductive, drainage, corrosion resistance and reinforcement. The proposed drainage method can realize the electroosmotic drainage in vertical and horizontal directions. Through layer by layer electroosmosis from bottom to top, the consolidation drainage effect of sludge in the lower layer can be enhanced by the increasing loading pressure from the upper sludge.

Abstract: A positive electrode sheet containing a high-safety heat-sensitive coating and a lithium-ion battery containing the positive electrode sheet are provided. The heat-sensitive coating includes a first conductive agent, a first binder, heat-sensitive polymer microspheres and an auxiliary agent, and has a conductive property at normal temperature and also has advantages of increasing a contact area between an active material and a current collector, improving the conductivity, and effectively reducing the polarization of battery and the like; when the use temperature of the positive electrode sheet reaches 120° C. and above, the heat-sensitive polymer microspheres will melt to form a plurality of continuous electron blocking layers, current blocking occurs in the coating, an internal blocking forms inside the battery, thereby preventing the occurrence of further thermal runaway of lithium-ion battery.

Abstract: Disclosed are a positive electrode plate and a battery including the positive electrode plate. The positive electrode plate includes a positive electrode current collector, at least one thermosensitive coating layer, at least one composite fusion layer, and at least one positive electrode active material layer. The thermosensitive coating layer has electrical conductivity at room temperature, and has advantages of increasing a contact area between the active material and the current collector, effectively reducing battery polarization, and the like. When a temperature of the positive electrode plate during use reaches a thermosensitive temperature and higher, thermosensitive polymer microspheres melt to form at least one continuous electron blocking layer, therefore forming a current blockage, and an internal blockage is formed inside the battery, thereby preventing further thermal runaway of a secondary battery, and improving safety performance of the secondary battery.

Abstract: This application provides a motor drive system, a power system, and an electric vehicle, and relates to the field of power electronic technologies. The drive system is configured to drive a motor that uses a power battery pack as a power supply. The power battery pack includes at least two battery modules that are independent of each other, the drive system includes at least two direct current-alternating current DC-AC circuits, and the battery modules one-to-one correspond to the DC-AC circuits. Each battery module is correspondingly connected to an input end of one DC-AC circuit, and an output end of each DC-AC circuit is connected to a corresponding winding of the motor. The DC-AC circuit is configured to convert a direct current provided by the corresponding battery module into an alternating current to drive the corresponding winding of the motor.

Abstract: A payment method and system based on a cloud application instance, and a related device are provided. The method includes the following steps: The cloud application instance sends an order and a device identity to a payment management node. The payment management node records a correspondence between the order and the device identity. The cloud application instance sends an order payment request to a terminal device. The terminal device sends, to the payment management node based on the order payment request, an order obtaining request carrying the device identity. The payment management node obtains the order from the correspondence based on the device identity carried in the order obtaining request, and sends the order to the terminal device. The terminal device receives and processes the order.

Abstract: A database dual-core storage system based on optical disk comprises a server, a magnetic disk storage device and an optical disk storage device connecting to the server via data connection, a database management system, a data processor and a data connector installed on the server, wherein the database management system is arranged for completing database management and data management of the magnetic disk storage device and the optical disk storage device in response to data requests; the data processor is arranged for configuring fields of a database base core and fields of a database extension core, writing data of corresponding fields into the database base core and the database extension core respectively in response to data requests; the data connector is arranged for creating data connection between the database base core and the database extension core in response to data requests. The integrity and safety of data are guaranteed.

Abstract: This application discloses a motor control unit. A type of a power component in a first drive circuit of the motor control unit is different from a type of a power component in a second drive circuit of the motor control unit. A loss of the power component in the first drive circuit is greater than a loss of the power component in the second drive circuit. When determining that a load of the motor is less than a preset load, the control unit controls the first drive circuit to stop working and controls the second drive circuit to work. When determining that the load of the motor is greater than or equal to the preset load, the control unit controls both the first drive circuit and the second drive circuit to work. According to the motor control unit, efficiency of the motor control unit can be effectively improved.

Abstract: Disclosed is an electrokinetic-aeration-liquid injection combined remediation method for compound contaminated soil containing heavy metals and organic substances, and belongs to the field of contaminated soil remediation. According to the present application, in the combined remediation method, the electrokinetic remediation method enables water in soil to migrate from bottom to top to drive heavy metals and organic substances to be enriched towards the top; bubbles generated by the aeration method are diffused from the bottom to the top to drive volatile organic compounds to move towards the top soil. During liquid injection process, the electrolyte is driven to move from bottom to top under the action of electrokinetic remediation flow, which can keep the pH of the soil stable and remediate heavy metals and organic pollutants. The whole processes are simultaneously completed by adopting the dual-channel porous EKG electrode designed by the present application, which is efficient and convenient.

Abstract: Disclosed is a sludge three-dimensional electroosmosis drainage reinforcing method based on a novel electric geotextile complex, and belongs to the field of soft soil foundation reinforcement. A novel electric geotextile complex is adopted, and a designed multidirectional three-dimensional continuous electroosmosis drainage method is adopted to perform rapid drainage reinforcement treatment on sludge, wherein the electric geotextile complex is prepared by combining fibers and conductive materials with a flexible drainage plate and has the effects of electric conductive, drainage, corrosion resistance and reinforcement. The proposed drainage method can realize the electroosmotic drainage in vertical and horizontal directions. Through layer by layer electroosmosis from bottom to top, the consolidation drainage effect of sludge in the lower layer can be enhanced by the increasing loading pressure from the upper sludge.

Abstract: A heterogeneous database storage system based on optical disk includes a magnetic disk storage device and an optical disk storage device connecting, via a data connection, to a server. A relational database management system, a non-relational database management system, a data processor and a database connector are installed on the server. Fields of a record are divided into two parts by the data processor. A part of the fields are in a relational database, and the other part of the fields are in a non-relational database. Fields of the relational database constitute a subrecord of the relational database, and Fields of the non-relational database constitute a subrecord of the non-relational database. The subrecord of the relation database and the corresponding subrecord of the non-relational database form an integral record by the database connector.

Abstract: A related power conversion circuit includes a three-level switch circuit and a resonant circuit, and a control method of the related power conversion circuit includes: controlling all transistors in the three-level switch circuit to be turned off, where a body diode connected in parallel to a transistor S1, a body diode connected in parallel to a transistor Q1, and a body diode connected in parallel to a transistor Q2 are all turned on based on a current freewheeling function of the resonant circuit; controlling the S1 to be turned on, to set up a first working state of the power conversion circuit; and after the first working state lasts for a time length T1, controlling the Q1 and the Q2 to be turned on.