Abstract: An electrode assembly and a preparation method thereof, a secondary battery, a battery module, a battery pack, and an electric apparatus are provided. The electrode assembly provided by this application includes a positive electrode, a negative electrode, and a separator located between the positive electrode and the negative electrode, where the positive electrode and the separator contain a solid electrolyte, a liquid electrolyte is present between the separator and the negative electrode, and a mass ratio of the solid electrolyte to the liquid electrolyte is 1:1 to 8:1, optionally 2:1 to 6:1.

Abstract: A solid electrolyte membrane, a solid battery, a battery module, a battery pack, and a power consuming device are provided. The solid electrolyte membrane comprises a sulfide electrolyte material and polymer particles dispersed in the sulfide electrolyte material; on the basis of 100 parts by mass of the total mass of the sulfide electrolyte material and the polymer particles, the mass of the polymer particles is 1 to 50 parts by mass; and no less than 90 wt % of the polymer particles have a size of 1 ?m to 500 ?m. Once compression-molded in conditions of 100 MPa to 500 MPa, the polymer particles have a compaction density of greater than 95% and a breaking strength of higher than 50 MPa. The mechanical properties of the solid electrolyte membrane can be improved so as to inhibit the propagation of cracks throughout the solid electrolyte membrane, thereby effectively solving the problem of lithium dendrites running throughout the solid electrolyte membrane.

Abstract: This application provides a negative electrode plate, a lithium metal battery, and an apparatus including the lithium metal battery. The negative electrode plate includes a negative electrode current collector and a lithium-metal negative electrode disposed on at least one surface of the negative electrode current collector, where a polymer protective film is disposed on a surface of the lithium-metal negative electrode away from the negative electrode current collector, the polymer protective film includes a citric acid copolymer, and a number-average molecular weight Mn of the citric acid copolymer is 10,000 to 1,000,000. In this application, a polymer protective film with high tensile strength, high puncture strength, high elongation, and high electrolyte holding capacity may be formed on the surface of the lithium-metal negative electrode in the negative electrode plate.

Abstract: A current collector includes a current collector body and a lithiophilic layer applied on a surface of the current collector body. The lithiophilic layer has lithium affinity and comprises a lithiophilic material. The lithiophilic material comprises an internal structure and an external structure, and the internal structure is a cavity.

Abstract: Embodiments of the present application provide a lithium metal negative electrode, a preparation method therefor and related lithium metal battery and device. The lithium metal negative electrode may comprise: a negative electrode current collector; at least one lithium-based metal layer provided on at least one surface of the negative electrode current collector; and an ion-conducting polymer modification layer, which is located on the surface of one of the at least one lithium-based metal layer and comprises at least catalytic amount of a Lewis acid, the Lewis acid containing cations of a metal capable of forming an alloy-type active material with lithium.

Abstract: The present application discloses a sulfide solid electrolyte and a method for the preparation thereof, an all solid state lithium secondary battery, and an apparatus containing the all solid state lithium secondary battery. The sulfide solid electrolyte is obtained by compounding at least Li2S, P2S5 and a dopant MxS2O3, wherein M is one or more selected from Na, K, Ba and Ca, and 1?x?2.

Abstract: A physical address determining method, apparatus, and device, and a storage medium, and belongs to the field of solar power generation, includes: controlling at least two slave nodes to sequentially start up, and detecting a change status of an input voltage of the master node; dividing a photovoltaic power generation system into a plurality of photovoltaic strings; and for each candidate photovoltaic string, controlling any slave node located in the candidate photovoltaic string to start up and other slave nodes to shut down, and using the physical address as a physical address of the candidate photovoltaic string. This disclosure provides a manner of automatically determining a physical address of a photovoltaic string, thereby implementing photovoltaic-string locating and expanding a system function range. When an anomaly occurs, the anomaly can be eliminated in a timely manner, thereby improving system stability.

Abstract: A supramolecular ionic liquid, a solid-state electrolyte membrane, a solid-state lithium metal battery, and an apparatus are provided. The supramolecular ionic liquid of this disclosure has a benzophenanthrene structure represented by formula (I), where R1 is selected from ether groups, polyether groups, halogenated ether groups, or halogenated polyether groups having 1 to 16 carbon atoms; and R2 is selected from ether groups or polyether groups having 1 to 16 carbon atoms. The supramolecular ionic liquid of this disclosure has an ionic conductivity as high as 10?3 S/cm at room temperature. A solid-state electrolyte membrane made therefrom also has an ionic conductivity as high as 10?3 S/cm at room temperature. This is close to performance of a liquid electrolyte, proposing a solution to the problem of low ionic conductivity in existing solid-state electrolytes.

Abstract: A heating system includes first and second input ends, first and second battery modules, first switch and second switches, and a control unit. The first switch is connected between first terminals of the first and second battery modules. Second terminals of the first and second battery modules are connected to each other. The second switch is connected between the first input end and the first terminal of the second battery module. The second input end is connected to the first terminal of the first battery module. The first terminals of the first and second battery modules have a same polarity, and the second terminals of the first and second battery modules have a same polarity. The control unit is connected to the first and second switches, and configured to control the first and second switches to be turned on or off.

Abstract: A composite lithium metal negative electrode, a preparation method thereof, a lithium secondary battery, and an apparatus are provided. In some embodiments, the composite lithium metal negative electrode includes lithium metal and a lithium buffer layer on at least one surface of the lithium metal. The lithium buffer layer includes a porous framework and a lithiophilic material, where the porous framework is a conductive porous framework, the lithiophilic material is distributed in the porous framework, and a distribution density of the lithiophilic material in the porous framework decreases in a continuous gradient in a direction of the lithium buffer layer away from the lithium metal. A conductive lithium buffer layer with a continuous gradient change in lithiophilicity is added on a surface of the lithium metal negative electrode.

Abstract: The present disclosure relates to a positive electrode active material and a positive electrode plate for all-solid-state lithium secondary battery, an all-solid-state lithium secondary battery, and an apparatus. The positive electrode active material provided in the present disclosure includes a positive electrode active substance and a sodium thiosulfate coating layer coating a surface of the positive electrode active substance. Applying the positive electrode active material provided in the present disclosure to the positive electrode plate for all-solid-state lithium secondary battery can significantly improve the cycling performance and capacity retention rate of the battery.

Abstract: Embodiments of this application provide charging apparatuses, charging apparatus control methods, and charging systems, and relate to the field of terminal device charging technologies. The charging apparatus includes a rectifier circuit, a transformer, a lower bridge switch, a clamp capacitor, an upper bridge switch, and a controller. The transformer includes a primary coil and at least one secondary coil. The controller is configured to control the upper bridge switch and the lower bridge switch to be alternatively turned on. The controller is further configured to obtain a sampling waveform at a location at which the controller is electrically connected to the transformer when the lower bridge switch is turned off, and, when the sampling waveform is abnormal, turn off the lower bridge switch in a first phase of a next charging cycle. The sampling waveform includes a voltage waveform of the primary coil or a voltage waveform of the secondary coil.

Abstract: A negative-electrode plate, a preparation method thereof, and a secondary battery, a battery module, a battery pack, and an electric apparatus including such negative-electrode plate are provided. The negative-electrode plate includes an alkali metal layer and a polymer film layer provided on at least one surface of the alkali metal layer. Surface resistivity of the polymer film layer gradually increases in a thickness direction of the polymer film layer away from the alkali metal layer. When the negative-electrode plate is used in a secondary battery, lithium dendrites can be effectively inhibited.

Abstract: An electrolyte for a lithium-ion battery, a lithium-ion battery, a battery module, a battery pack, and an apparatus are provided. The electrolyte includes an organic solvent, an electrolyte lithium salt dissolved in the organic solvent, and an additive, where the additive is a compound represented by following formula I. The electrolyte can inhibit generation of lithium dendrites in the lithium-ion battery, improve cycle performance of the battery, and also improve flame retardancy of the battery, thereby effectively resolving defects in the existing technology.

Abstract: This application provides a polymer current collector, a preparation method thereof, and a secondary battery, battery module, battery pack, and apparatus associated therewith. The polymer current collector provided in this application includes polymer film layers, where the polymer film layers include a first polymer film layer and a second polymer film layer, a resistivity of the first polymer film layer is denoted as ?1, a resistivity of the second polymer film layer is denoted as ?2, and the current collector satisfies ?1>?2. The polymer current collector in this application can induce to deposit of lithium metal from a low conductivity side to a high conductivity side, avoiding risks of depositing lithium ions on the surface of the current collector and thereby increasing cycle life of lithium metal batteries.

Abstract: A solid-state battery, a battery module, a battery pack, and an apparatus associated therewith are provided. In some embodiments, the solid-state battery includes a solid-state electrolyte, where the solid-state electrolyte includes a sulfide electrolyte layer and at least one polymer electrolyte layer provided on a surface of the sulfide electrolyte layer, and the solid-state electrolyte satisfies the following condition: thickness of the sulfide electrolyte layer?thickness of the polymer electrolyte layer on one side ?84.2?80.2w. The polymer electrolyte layer having an appropriate thickness in this disclosure can improve interfacial infiltration between the current sulfide electrolyte layer and an electrode without seriously reducing the overall energy density of the battery, thereby overcoming defects of sulfide electrolyte in disclosures in solid-state batteries to a large extent and improving cycling performance and safety performance of solid-state batteries.

Abstract: A physical address determining method, apparatus, and device, and a storage medium, and belongs to the field of solar power generation, includes: controlling at least two slave nodes to sequentially start up, and detecting a change status of an input voltage of the master node; dividing a photovoltaic power generation system into a plurality of photovoltaic strings; and for each candidate photovoltaic string, controlling any slave node located in the candidate photovoltaic string to start up and other slave nodes to shut down, and using the physical address as a physical address of the candidate photovoltaic string. This disclosure provides a manner of automatically determining a physical address of a photovoltaic string, thereby implementing photovoltaic-string locating and expanding a system function range. When an anomaly occurs, the anomaly can be eliminated in a timely manner, thereby improving system stability.

Abstract: This application provides a lithium secondary battery and a negative electrode plate for the lithium secondary battery. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer disposed on at least one surface of the negative electrode current collector, where a surface of the negative electrode active material layer closer to the current collector is provided with an elastic coating. And the elastic coating includes an elastic polymer and a conductive agent. At a pressure of 1 MPa to 20 MPa, the elastic coating has a compression deformation of 20% to 80% and an elastic modulus of 1 MPa to 800 MPa. And optionally, at the pressure of 1 MPa to 20 MPa, the elastic coating has a compression deformation of 30% to 60% and an elastic modulus of 5 MPa to 100 MPa.

Abstract: A physical address determining method, apparatus, and device, and a storage medium, and belongs to the field of solar power generation, includes: controlling at least two slave nodes to sequentially start up, and detecting a change status of an input voltage of the master node; dividing a photovoltaic power generation system into a plurality of photovoltaic strings; and for each candidate photovoltaic string, controlling any slave node located in the candidate photovoltaic string to start up and other slave nodes to shut down, and using the physical address as a physical address of the candidate photovoltaic string. This disclosure provides a manner of automatically determining a physical address of a photovoltaic string, thereby implementing photovoltaic-string locating and expanding a system function range. When an anomaly occurs, the anomaly can be eliminated in a timely manner, thereby improving system stability.

Abstract: A three-dimensional composite metallic lithium negative electrode, a metallic lithium battery and an apparatus are disclosed. The composite metallic lithium negative electrode includes metallic lithium particles and a three-dimensional polymer framework, where the metallic lithium particles are filled in the three-dimensional polymer framework, and the three-dimensional polymer framework includes lithium-philic a fragments, active sites and polymer-containing moieties. The present application improves a volume effect of the metallic lithium negative electrode in charge and discharge process, which can inhibit side reactions of metallic lithium and electrolyte; increase a specific surface area of the metallic lithium negative electrode, and introduce lithium-philic nano-sites, thereby can guide a uniform deposition of the metallic lithium and effectively inhibit generation of lithium dendrites.