Abstract: This positive electrode active material for nonaqueous electrolyte secondary batteries comprises a lithium-transition metal composite oxide and a surface modification layer. The lithium transition metal composite oxide contains at least Al and 80 mol % or more Ni with reference to the total number of moles of metal elements excluding Li, and the surface modification layer contains at least Sr and is formed on the surface of primary particles of the lithium-transition metal composite oxide.

Abstract: A portable solar photovoltaic array power generator set container and a usage method thereof are provided. The portable solar photovoltaic array power generator set container includes a foldable solar photovoltaic power generation unit, a rail component for the foldable solar photovoltaic power generation unit to unfold and retract, electrical equipment and a container. The foldable solar photovoltaic power generation unit includes multiple frames, multiple solar photovoltaic components, a hinge component and a movable component. The foldable solar photovoltaic power generation unit further includes a position-limiting component for limiting an unfolding angle of each set of frames.

Abstract: The present disclosure provides a CCS assembly and a battery module. The CCS assembly includes an insulating film and a busbar group. The busbar group includes two output bars, connecting bars, and two positioning plates. The two output bars are correspondingly arranged at two ends of the battery module in a length direction. The connecting bars are arranged between the two output bars. At the same end of the battery module in the length direction, the output bar is at least partially supported by the positioning plate, and the positioning plate extends toward the connecting bar adjacent to the output bar. The insulating film is disposed on one side of the busbar group facing battery cells of the battery module. The busbar group is connected to the insulating film.

Abstract: An output busbar includes an internal connection part and an external connection part connected to the internal connection part. A thickness of the external connection part is greater than a thickness of the internal connection part.

Abstract: A battery mounting box is provided and includes a body provided with a pressure relief hole; a supporting structure provided in the body and configured to support a battery module. The supporting structure includes a tray and at least one supporting rib provided at a bottom of the tray. The at least one supporting rib is configured to support between the tray and a bottom plate of the body such that a pressure relief cavity is formed between the tray and the bottom plate. The pressure relief cavity and the pressure relief hole are in communication such that gas is capable of discharging through the pressure relief hole.

Abstract: Disclosed are an all-tab negative electrode sheet and a cylindrical battery. The all-tab negative electrode sheet includes an electrode sheet body. The electrode sheet body includes: a coating area, the electrode sheet body in the coating area being coated with a negative electrode material; a flattening area adjacent to the coating area in a width direction of the electrode sheet body, the width direction being perpendicular to the length direction, wherein (N+1) tab groups are arranged in the flattening area in sequence along the length direction, each of the tab groups comprises one or more tabs, a (N+1)th tab group is adjacent to a Nth tab group, a width of the tabs of the (N+1)thtab group is greater than that of the tabs of the Nth tab group, and N is a positive integer.

Abstract: The present disclosure provides a CCS assembly and a battery module. The CCS assembly includes a busbar group, a first insulating film, and an insulating support plate. The busbar group includes two output bars and a plurality of connecting bars. The two output bars are correspondingly arranged at two ends of the battery module in a length direction, and the plurality of connecting bars are arranged between the two output bars. The insulating support plate is arranged parallel to the first insulating film. The first insulating film is disposed on one side of the busbar group facing away from battery cells and is attached to the busbar group. The insulating support plate is disposed on one side of the busbar group facing the battery cells and is attached to the busbar group.

Abstract: The positive electrode active material for a lithium ion secondary battery contains a lithium-nickel composite oxide, in which the lithium-nickel composite oxide contains lithium, nickel, manganese, titanium, niobium, and optionally an element M1, an amount of substance ratio of the respective elements is represented as Li:Ni:Mn:M:Ti:Nb=a:(1?x1?y1?b?c):x1:y1:b:c (provided that, 0.95?a?1.25, (1?x1?y1?b?c)<0.80, 0.03?x1?0.35, 0?y1?0.35, 0.005?b?0.05, and 0.001<c?0.03), in the amount of substance ratio, (b+c)?0.06 and b>c are satisfied, and an amount of lithium to be eluted in water is 0.07% by mass or less.

Abstract: A battery module includes a top plate, a bottom plate, two end plates, and two side plates. At least one of the two end plates includes a plate body including a hollow structure provided with first reinforcing grooves and a first connecting hole. At least two of the first reinforcing grooves are arranged at intervals along a first direction of the plate body. At least one of the two side plates includes a base plate and a base mounting plate. The base plate is provided with a fixing hole penetrating through the base plate. The base mounting plate is bent and connected to the base plate and includes an outer connecting part provided with a first mounting hole. The first connecting hole is configured for a first fixing member to pass through. The first mounting hole is configured for a second fixing member to pass through.

Abstract: Disclosed is a battery pack including a case body that includes a first chamber structure; at least one battery module disposed in the first chamber structure. The battery module includes a battery cell group and a surrounding frame surrounding the battery cell group. The surrounding frame is detachably connected to the case body.

Abstract: The present application relates to a negative electrode plate and a lithium metal battery. The lithium metal battery includes a steel can; a core disposed inside the steel can, the core is formed by winding a positive electrode plate, a separator, and a negative electrode plate, the negative electrode plate is made of lithium metal, and a metal reinforcement structure is embedded in the negative electrode plate; a negative electrode tab, a first end of the negative electrode tab is connected to the negative electrode plate, and a second end of the negative electrode tab is welded to an inner wall of the steel can; a positive electrode tab, a first end of the positive electrode tab is connected to the positive electrode plate; a cap, a second end of the positive electrode tab is welded to the cap; an insulation assembly arranged at both ends of the core.

Abstract: The present disclosure provides a double-sided passivated contact cell, where a front side and a rear side of the double-sided passivated contact cell each are provided with a tunnel layer, a doped polysilicon layer, and a passivation layer sequentially from an inside to an outside; and for the doped polysilicon layer at the front side and the doped polysilicon layer at the rear side, one of the doped polysilicon layer at the front side and the doped polysilicon layer at the rear side is a boron and carbon co-doped polysilicon layer, and the other of the doped polysilicon layer at the front side and the doped polysilicon layer at the rear side is a phosphorus and carbon co-doped polysilicon layer. The present disclosure further provides a preparation method of the double-sided passivated contact cell.

Abstract: A button battery, a manufacturing method thereof, and an electronic device are disclosed, the button battery includes a housing including a bottom cover on a side of a negative electrode sheet and a positive electrode cover on a side of a positive electrode sheet; the housing includes the positive electrode sheet, a separator, a carbon foil, and the negative electrode sheet stacked in sequence; the separator has an inverted U-shape, and both sides of the inverted U-shape are bent toward the positive electrode sheet; the button battery is filled with electrolyte. The button battery of the present application is provided with the carbon foil between the negative electrode sheet and the separator.

Abstract: A control circuit of a BMS, a battery management system, and an electric vehicle are provided. The control circuit of the BMS may include: a charge-discharge switching module, a freewheel module, and a control module, where the charge-discharge switching module is connected between a battery and a load; the freewheel module is connected in parallel with the load; the control module is connected to the charge-discharge switching module and the freewheel module, respectively, and configured to generate a first control signal and a second control signal; the charge-discharge switching module is configured to be turned off in response to the first control signal; and the freewheel module is activated in response to the second control signal when the charge-discharge switching module is turned off.

Abstract: Disclosed herein are a harness isolation plate, an information sampling component, and a battery module. The harness isolation plate includes a plurality of isolation plate units, the plurality of isolation plate units are sequentially connected in a first direction; a connecting structure provided between every two isolation plate units, the connecting structure includes a first connecting member and a second connecting member, the first connecting member includes a first snap, the second connecting member includes a second snap, and the second snap is matched with the first snap.

Abstract: The present teaching relates to method and system for charging a rechargeable battery deployed in an electric apparatus. The system resides in the electric apparatus. The system comprises a motor, an inverter, an output rectifier, a configurator, and a controller. The motor comprises a stator having a plurality of stator teeth and a plurality of stator windings wounded on the plurality of stator teeth. The inverter comprises a plurality of power switch devices. The configurator has contactors coupled with the plurality of stator windings and the plurality of power switch devices. The controller controls the plurality of power switch devices and the plurality of contactors, configuring the system to operate in one of a traction mode and a charging mode, where in the charging mode a voltage and/or current regulation occurs using the plurality of power switch devices.