CATL Patente

A composite current collector (3), an electrode plate, a secondary battery (1), and an electric apparatus (2) are provided. The composite current collector (3) includes a substrate layer (31), a first filler (32), a bonding layer (33), and a conductive layer (34). The bonding layer (33) is located between the substrate layer (31) and the conductive layer (34). One end of the first filler (32) is embedded in the substrate layer (31), the other end of the first filler (32) is embedded in the bonding layer (33), a hardness of the first filler (32) is greater than a hardness of the substrate layer (31), and the hardness of the first filler (32) is greater than a hardness of the bonding layer (33). In the composite current collector (3), by introducing the first filler (32) having a greater hardness than the substrate layer (31) and the bonding layer (33), and making one end of the first filler (32) embedded in the substrate layer (31) and the other end embedded in the bonding layer (33), the first filler (32) can serve as a point of force application between the substrate layer (31) and the bonding layer (33), which is conducive to improving the elastic modulus of the composite current collector (3) and reducing the risk of wrinkling during electrode plate processing.

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Disclosed in the embodiments of the present application are a battery cell, a battery and an electric device. The battery cell comprises: an electrode assembly, wherein the electrode assembly comprises a positive electrode sheet, the positive electrode sheet comprises a positive electrode active material capable of realizing reversible de-intercalation and intercalation of metal ions, and the positive electrode active material comprises a compound containing nickel; and a case, which is used for accommodating the electrode assembly, wherein the melting point of at least some regions of the case is p, and p satisfies: 1200 °C ≤ p ≤ 2000 °C. According to the battery cell, the battery and the electric device in the embodiments of the present application, the reliability of the battery cell can be improved.

Disclosed in embodiments of the present application are a battery cell, a battery, and an electric device. The battery cell has a capacity of C and comprises a casing, and at least a partial region of the casing has a tensile strength of Rm at a temperature of 25 °C, wherein Rm and C satisfy: 250 MPa ≤ Rm ≤ 2000 MPa and 25 Ah ≤ C ≤ 550 Ah. According to the battery cell, the battery, and the electric device in the embodiments of the present application, the energy density and reliability of the battery can be improved.

Embodiments of the present application provide a casing, a battery cell, a battery, and an electrical apparatus. An opening is formed in the casing; the casing comprises a first wall and at least one second wall that are opposite to the opening, and the first wall and the second wall intersect with each other; the first wall and the second wall are connected by a first fillet, and the inner diameter r1 of the first fillet and the minimum thickness T2 of the second wall with the minimum thickness among the at least one second wall satisfy: 2.0 ≤ r1/T2 ≤ 30; the yield strength of the casing at the temperature of 25 °C is Re, wherein Re satisfies: 140 MPa ≤ Re ≤ 1000 MPa. According to the casing, the battery cell, the battery, and the electrical apparatus in the embodiments of the present application, the processing difficulty of the casing and the spatial capacity and strength of the battery cell can be balanced.

An electrolyte additive composition, an electrolyte, a battery, and an electric apparatus are provided. The electrolyte additive composition includes an isocyanate additive and an impedance-stabilizing additive at a weight ratio of (0.1 to 0.8):1. In the electrolyte additive composition, the impedance-stabilizing additive and the isocyanate additive are compounded, and a content ratio of the two is controlled, so that the stability of the impedance-stabilizing additive in the electrolyte can be improved, reducing the DCR of a cell of a battery and improving the stability of the DCR of the cell of the battery during charging, discharging, and storage, thereby improving the RTE of the battery during service.

Disclosed are a cup holder dust removal mechanism and a battery production line. The cup holder dust removal mechanism includes a conveyor line (20), a box (30), a transfer apparatus (40), a blowing apparatus (50), and an extraction apparatus (60). The conveyor line (20) passes through the box (30), the transfer apparatus (40), the blowing apparatus (50), and the extraction apparatus (60) are mounted on the box (30), the transfer apparatus (40) includes a transfer track (410), the transfer track (410) includes an inlet section (411), an outlet section (412), and a working section (413) located between the inlet section (411) and the outlet section (412), an inlet of the inlet section (411) and an outlet of the outlet section (412) are both docked with the conveyor line (20), in a vertical direction, at least part of a projection of the working section (413) does not overlap with a projection of the conveyor line (20), the blowing apparatus (50) includes a blowing nozzle (51), and the extraction apparatus (60) includes an extraction end (61). The technical solution of the present application aims to remove dust and/or foreign matter remaining in the cup holder during cyclic use, reduce the probability of contaminating cells, and improve the product quality of batteries.

The present application provides a battery module, a battery, and a power-consuming apparatus, and belongs to the field of battery technologies. The battery module includes a battery group, an end plate, and an insulation member. The end plate is arranged in a first direction on a side of the battery group, and an avoidance region is formed at a corner of the end plate. The insulation member is arranged in the first direction between the battery group and the end plate to insulate the battery group from the end plate. A corner region is formed at a position on the insulation member corresponding to the avoidance region, and the corner region is fixedly connected to the battery group. Fixedly connecting, to the battery group, the corner region formed at the insulation member corresponding to the avoidance region of the end plate helps to reduce the phenomenon of warping or separation of the corner region of the insulation member, such that the structural stability of the insulation member mounted between the end plate and the battery group can be improved, and the interference effect on an assembly region of the end plate due to warping or separation of the corner region of the insulation member can also be reduced, thereby reducing the assembly difficulty of the battery module and improving the assembly quality of the battery module.

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The present application provides a secondary battery and an electric apparatus. The secondary battery includes an electrolyte solution and a separator, the separator including a base film and a coating located on at least one side of the base film, where the secondary battery satisfies: 0.5≤G×H/(10×σ)≤13, G is a Gurley value of the base film, with a unit of s, H is a thickness of the coating, with a unit of µm, and σ is an electrical conductivity of the electrolyte solution at 25 °C, with a unit of mS/cm. The secondary battery can achieve both safety and fast charging performance.

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Disclosed in embodiments of the present application are a shell, a battery cell, a battery, and an electric device. At least partial area of a shell 211 has a tensile strength Rm at a temperature of 25 °C. At least part of the shell 211 comprises first shell walls 2112, the average thickness of the first shell walls 2112 is T, Rm and T satisfy the following: 250 MPa ≤ Rm ≤ 2000 MPa, 0.05 mm ≤ T ≤ 0.5 mm, and 60 mm·MPa ≤ T × Rm ≤ 500 mm-MPa. According to the shell, the battery cell, the battery, and the electric device of the embodiments of the present application, the performance of the battery cell can be improved.