CATL Patente

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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.

This application relates to a new energy storage system and an energy storage operation method and device thereof, a computer device, a storage medium, and a computer program product. A new energy generation module is integrated with a power module and a battery module to build a new energy submodule. The power module and the new energy generation module within the new energy submodule are both connected to a control apparatus, thereby constructing a modular new energy storage system.

Disclosed in the present disclosure are a heat exchange unit (1) and an energy storage device. The heat exchange unit includes a housing (10), a heat exchange system, a plurality of fans (12), and at least one partition plate assembly (13); the housing (10) is provided with a first wall (10a), and the first wall (10a) is provided with a plurality of layers of air supply ports (10b); the heat exchange system is provided with a condenser assembly (11), the condenser assembly (11) is disposed on one side of the first wall (10a) in a thickness direction, and a cavity (1a) is defined between the condenser assembly (11) and the first wall (10a); the partition plate assembly (13) is provided with a partition position, and at the partition position, the partition plate assembly (13) partitions the cavity (1a) into a plurality of subspaces (1b) that are not in communication with each other, and each subspace (1b) is in communication with a corresponding layer of air supply ports (10b).

A new energy storage submodule and an operation method thereof, an energy storage valve, and an energy storage system and an operation method thereof. In a new energy grid-connected system, new energy assemblies are distributedly arranged in sub-modules to form a new energy storage submodule including a direct current bus, a power module, an energy storage module, a first converter, and a new energy assembly. The new energy assembly is connected to an energy storage system in the form of new energy storage submodule for operation. Modularizing the new energy assembly can reduce the impact of a single failure of a new energy assembly on a new energy grid-connected system. That is, in the case that a single new energy assembly fails, the new energy storage submodule where the failed new energy assembly is located can be removed, reducing the impact on the operation of other new energy assemblies, and increasing the proportion of operation time of the new energy grid-connected system, thereby effectively improving the system availability of the new energy grid-connected system.

A negative electrode slurry and a preparation method therefor, a negative electrode sheet, a sodium secondary battery, and an electric device. The negative electrode slurry comprises a negative electrode active material and a modifier that coats the surface of the negative electrode active material. The negative electrode active material comprises one or more of hard carbon and graphite coated with hard carbon. The modifier comprises carboxymethyl cellulose salt having a weight-average molecular weight of 20,000-150,000. The negative electrode slurry exhibits a low occurrence degree of gelation and foaming, and can improve the processing performance and the storage performance of the sodium secondary battery.

Provided in the present disclosure are a control method and system for a heat exchange unit. The control method includes: determining, based on load information, a target condenser from at least two condensers; determining, based on external environmental information, a target fan from a fan group corresponding to the target condenser; and controlling, based on a current condensing temperature corresponding to the target condenser, the operation of the target fan.

Embodiments of the present application relate to the field of control, and provide a drying oven system, and a current collector passing-through control method for a drying oven system. The system compr i ses: an oven body, wherein a drying cavity is formed in the oven body, and a current collector inlet and a current collector outlet which are communicated with the drying cavity are formed in the oven body; a traction device passing through the drying cavity; a fixing part connected to the traction device; and a controller configured to control, when a current collector is fractured, a coating system to push a first fractured section of the current collector out to a first side outside the oven body and pull a second fractured section of the current collector out to a second side outside the oven body, and control the traction device and the fixing part to pull the first fractured section, which is fixed to the fixing part, to pass through the drying cavity, wherein the second side is a side in the opposite direction of the first side, and the first side or the second side is a current collector inlet side.

The present application relates to the field of batteries. Provided are a drying apparatus and an electrode sheet manufacturing system. The drying apparatus comprises a housing and a drying device, the housing being provided with a drying cavity, the drying cavity being provided with a material strip inlet and a material strip outlet, and the drying device being arranged inside the drying cavity. The drying device comprises a first drying module, a second drying module and a conveying mechanism; the first drying module and the second drying module are used for drying material strips; the conveying mechanism is used for conveying the material strips, so that the material strips, from the material strip inlet, sequentially pass the first drying module, the second drying module and the material strip outlet; and the drying temperature of the first drying module is higher than the drying temperature of the second drying module. The drying apparatus is provided with the first drying module and the second drying module and the drying temperature of the first drying module is higher than the drying temperature of the second drying module; after entering the drying cavity through the material strip inlet, material strips are first rapidly dried at a high temperature by the first drying module and then are continuously dried by the second drying module, thereby improving the drying efficiency and achieving better drying quality.

A battery box (100), a manufacturing method for the battery box (100), a battery (1100) and an electric device, the battery box (100) comprising a first box body (110). The first box body (110) comprises a plate component (111), one side of the plate component (111) being provided with an accommodating space (1101) for accommodating a battery cell (200). The plate component (111) comprises a plate body portion (1111) and a first bent portion (1112), wherein the first bent portion (1112) is bent towards the accommodating space (1101) from the edge of the plate body portion (1111). The fillet radius at the bend of the edge of the plate component (111) is small, so that the width dimension of the first box body (110) can be reduced, thereby reducing the width dimension of the battery box (100); thus, the space occupied by the battery (1100) in the electric device can be reduced, facilitating improvement to the structural compactness and usage performance of the electric device.

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.

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.

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 tensile strength of at least some regions of the case at 500 °C is Rn, and Rn satisfies: 100 MPa ≤ Rn ≤ 1200 MPa. 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 comprises: an electrode assembly, the electrode assembly comprising a negative electrode sheet, the negative electrode sheet comprising a negative electrode active material from/into which metal ions can be reversibly deintercalated/intercalated, and the negative electrode active material comprising a silicon-based material; and a casing used for accommodating the electrode assembly, the tensile strength of at least partial area of the casing at the temperature of 25 °C being Rm, and Rm meeting: 250 MPa ≤ Rm ≤ 2000 MPa. 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.

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.

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.

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.

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.

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