Abstract: A lithium-ion battery and a method of preparing the same are provided. The lithium-ion battery includes a cell and an electrolyte solution, and the cell includes a negative electrode sheet. The negative electrode sheet includes a negative electrode current collector, an active coating layer disposed on a surface of the current collector, and a protective coating layer disposed on a surface of the active coating layer. The protective coating layer is a solid-state electrolyte coating layer. The electrolyte solution contains a film-forming agent. The method includes the following steps. After the cell is placed in a casing and the electrolyte solution is injected, formation is performed on the lithium-ion battery. The formation includes: S1, performing charging to 3.4V to 3.75V with a constant current rate of 0.02C to 0.04C; and S2, performing charging to 3.75V to 4.25V with a constant current rate of 0.05C to 0.3C.

Abstract: A battery assembly, a battery pack, and a vehicle are provided. The battery assembly includes a battery column and a voltage collection assembly disposed on one side of the battery column. The battery column includes at least one first battery, including first and second electrodes. A distance between the first electrode and the voltage collection assembly is greater than a distance between the second electrode and the voltage collection assembly. The first electrode is electrically connected to a case of the first battery, such that a potential of the first electrode is equal to a potential of the case. The voltage collection assembly includes first and second collection terminals. The first collection terminal is connected to the case and configured to collect the potential of the first electrode. The second collection terminal is connected to the second electrode and configured to collect a potential of the second electrode.

Abstract: The disclosure relates to the field of lithium-ion batteries and discloses a ternary positive electrode active material in a form of particles, and an area of 1 nm to 1,000 nm in a direction from an outermost surface to a center in a cross-section of each of the particles is defined as an outer layer, and the rest in the cross-section of each of the particles is defined as an inner layer. The inner layer is doped with a first metal element M, the outer layer is doped with a second metal element N, and a valence state of the first metal element M is lower than a valence state of the second metal element N. The center of the ternary active material particles is doped with the first metal element M in a low-valence state.

Abstract: A negative electrode sheet and a battery applying the same are provided. The negative electrode sheet includes a current collector and a negative electrode active coating disposed on two opposite surfaces of the current collector. The negative electrode active coating contains a negative electrode active material, and the negative electrode active material includes graphite. The negative electrode sheet satisfies 0.0025??*?/PD?0.0065, where ? is a porosity of the negative electrode sheet, ? is a surface density of a single surface of the negative electrode sheet with a unit of g/cm2, and PD is a compacted density of the negative electrode sheet with a unit of g/cm3. The compacted density PD, the surface density ?, and the electrode sheet porosity ? of the negative electrode sheet form specific correlation relationships among one another.

Abstract: A battery module includes a battery column, a heat insulation pad and a side plate. The battery column includes a plurality of batteries, and the batteries are arranged in a first direction. The heat insulation pad is disposed between two adjacent batteries in the battery column. The side plate is disposed on a side surface of the battery column and extends in the first direction. At least one heat-resistant region is disposed on the side plate and corresponds to a position of the heat insulation pad. The heat-resistant region is any one of a through hole, a blind hole, and a notch or a combination of two or more of the foregoing communicated with each other. At least a portion of an orthographic projection of the heat insulation pad on the side plate is disposed within the heat-resistant region.

Abstract: The disclosure relates to a technical field of batteries, and in particular, relates to a battery pack, an assembly process thereof, and a vehicle. The battery pack includes a battery compartment configured for accommodating a plurality of batteries, and a side wall of the battery compartment is a blocking beam. The assembly process includes the following: arranging at least two adjacent side walls of the battery compartment excluding the blocking beam at a first predetermined position to form an accommodating space; arranging the batteries in the accommodating space; and arranging the blocking beam at a second predetermined position to limit the batteries.

Abstract: The disclosure discloses a battery device, a detection method thereof, a method and device for screening battery cells. The characteristic values are determined according to parameters of two peaks in the frequency-domain impedance diagram. The characteristic values may reflect the magnitude of charge transfer impedance and diffusion impedance in each battery cell, then reflect the characteristics of the interface and characteristics of solid phase particles during charging and discharging, and further reflect the health and performance of battery cells. The battery set screened in this way still have good consistency after storage and shelving, and the consistency between battery cells will not deteriorate after storage for a period of time, so that the battery device may have better performance.

Abstract: The disclosure discloses a battery module and a battery pack. The battery module includes a single-cell battery module, having a plurality of single-cell batteries disposed in a stack; two end plates, disposed opposite to each other, where the two end plates are respectively disposed at two ends of the single-cell battery module in a stacking direction of the single-cell batteries, and non-penetrating mounting holes are disposed on bottoms of the two end plates; a supporting plate, disposed at the bottoms of the two end plates, where the supporting plate and the end plate are connected through the non-penetrating mounting holes.

Abstract: The invention provides a lithium-ion battery electrode piece and a lithium-ion battery including the same. The electrode piece includes an electrode active material layer disposed on the surface of the current collector and a protective layer disposed on the surface of the electrode active material layer. The protective layer is composed of metal oxide layers and conductive layers alternately stacked in the horizontal direction. The area ratio of the metal oxide layers to the conductive layers is 4:1-1:4, and the thickness ratio is 0.5:1-1:1. According to the invention, by regulating the shape and ratio of the high temperature stability material and the conductive active material on the electrode piece in the process of coating the protective layer, the amount of the two coating materials is precisely controlled to implement the precise regulation of the high temperature stability and rate performance of the electrode piece.

Abstract: The disclosure discloses a liquid-cooled battery module and a battery pack. The liquid-cooled battery module includes a housing, the outer side surfaces of the two opposite side walls of the housing are provided with connecting portions, so that the liquid-cooled battery module is connected to the battery pack through the connecting portions; a single battery pack, which is disposed in the housing; further includes a heat-dissipating component, which is disposed at the bottom of the housing and connected with the single battery pack. In the vertical direction, the top surface of the heat-dissipating component is spaced apart from the bottom surface of two opposite side walls provided with the connection portions.

Abstract: A battery module and a battery pack are provided. The battery module includes a casing and a cell assembly disposed in the casing. The casing includes two side plates opposite to each other. Each of the side plates includes a side plate body, a protruding rib portion, and lifting lugs. The protruding rib portion is disposed on an outer side surface of the side plate body and extends in a length direction of the side plate body. The protruding rib portion includes a protruding rib and a notch, and the protruding rib and the notch are adjacent to each other in an extending direction of the protruding rib portion. The notch is provided on at least one end of the protruding rib portion in the extending direction. The lifting lugs are disposed on the protruding rib at intervals in the extending direction of the protruding rib portion.

Abstract: The disclosure relates to the technical field of batteries, and provides a battery and a method for manufacturing the battery. The battery includes a liquid injection hole and a positioning portion, the liquid injection hole has a first center point, the positioning portion is formed with a second center point. There is a preset distance between the first center point and the second center point, so as to determine the first center point through the second center point. The liquid injection hole has a first center point, the positioning portion is formed with the second center point, and there is a preset distance between the first center point and the second center point.

Abstract: A preparation method of a cathode slurry and a battery are provided. The preparation method includes: S1, mixing materials containing a plasticizer and an additive to form a premixed slurry A; and S2, mixing a styrene-butadiene rubber emulsion with the premixed slurry A. The plasticizer includes a first functional group including at least one of a hydroxyl group, a carbonate group, and a ketone group. The additive includes a second functional group including at least one of a carboxyl group, a nitrile group, and an amide group.

Abstract: A battery container, a battery pack, and a vehicle are provided. The battery container includes a battery compartment and a first beam. The battery compartment is configured to accommodate a plurality of batteries. The batteries are arranged along a first direction. The first beam extends along the first direction and forms a first side wall of the battery compartment. A first adhesive receiving groove is recessed from an inner wall of the first beam. The first adhesive receiving groove extends along the first direction. The first adhesive receiving groove is configured to be filled with a connection adhesive to connect the first beam to the batteries. The inner wall of the first beam is a side wall of the first beam facing the batteries.

Abstract: The invention discloses a battery pack shell and a battery pack. When a bottom heat exchange plate and a frame are fixed by a first fastener, and a bottom guard plate and the frame are fixed by a second fastener, different fasteners may be configured for fixing the bottom heat exchange plate and the frame, and for fixing the bottom guard and the frame, respectively. Moreover, when a first sealing strip for sealing the connection between the frame and the bottom heat exchange plate is configured, the sealing of the connection between the frame and the bottom heat exchange plate may be implemented through the first sealing strip.

Abstract: The disclosure relates to the technical field of batteries, and a battery is provided, including a housing; a cell, which is disposed in the housing, and includes a main body and a first tab, and the first tab is led out from one end of the main body; a first insulator, which is disposed in the housing; a first current collector, which is integrally formed in the first insulator, and is connected to the first tab; the largest circumferential outer edge of the orthographic projection of the first current collector facing an end surface of the main body is located inside the largest circumferential outer edge of the orthographic projection of the first insulator facing an end surface of the main body.

Abstract: A battery includes a battery body having a body top surface, a body bottom surface, and a body side wall. The body side wall includes two oppositely disposed first side walls. Distance between outer surfaces of the two first side walls is L. First and second positions not coincide with each other are taken on midline of any first side wall, the first position is located in a range of 0 to 10 mm from the body top surface, the second position is located in a range of 0 to 10 mm from the body bottom surface, and distance between the first and second positions is H. Under conditions of ambient temperature being 25° C. and 2C current rate, temperature at first position is T1, temperature at second position is T2, and the battery satisfies (T1?T2)×3L/H?20° C.

Abstract: The invention discloses a battery case and a battery device. A groove is disposed on a side surface of a boundary beam facing a bottom plate. The groove is disposed around an accommodating space formed by the boundary beam and the bottom plate. A sealing strip is disposed in the groove along an extending direction of the groove, and the sealing strip is in contact with the bottom of the groove and the bottom plate, respectively. The sealing of the connection between the boundary beam and the bottom plate may be implemented by the sealing strip.

Abstract: The disclosure discloses an energy storage battery box including a battery apparatus, a box body, and a compression component. The battery apparatus includes a plurality of batteries stacked in sequence. The box body is internally provided with an accommodating cavity suitable for accommodating the battery apparatus. One side of the box body is provided with an opening in a stacking direction of the batteries, and the opening communicates with the accommodating cavity. The compression component is adapted to seal the opening. The compression component and an edge of the opening are detachably connected.

Abstract: A cylindrical battery includes a battery housing; a cell, which is arranged in the battery housing, and includes a cell body and a tab portion, and the tab portion is extended from at least one side of the cell body; a first insulating film, which is arranged on the outer surface of the cell body, and is connected with the cell; a second insulating film, which is arranged on the outer surface of the cell body, the second insulating film covers and is connected with the first insulating film. One end of the second insulating film is not lower than an end surface of the cell body provided with the tab portion, and the other end of the second insulating film overlaps the first insulating film so that a portion of the second insulating film overlaps the first insulating film.