Contemporary Amperex Technology (hong Kong) Limited

Contemporary Amperex Technology Co., Ltd.

Jianfu He

Qian Liu

Yonghuang Ye

Jingxuan Sun

Xueyang Sun

Haizu Jin

Xiaofu Xu

Tao Zhang

Changlong Han

Yu Yan

Quanguo Li

Zeli Wu

Bin Jiang

Lei Huang

Fajun Huang

Huiling Chen

Chenhui Lin

Chenxu Luo

Jianfu Pan

Xinyu Zhang

Yibo Shang

Yiming Qin

Renjie Pei

A positive electrode active material composition, a positive electrode plate, a battery, and an electric apparatus are described. The positive electrode active material composition includes a first positive electrode active material and a second positive electrode active material, where the first positive electrode active material includes a core LiAMnBPRODand a coating layer covering the core. The coating layer comprises one or more of pyrophosphate, phosphate, and carbon. The second positive electrode active material includes a compound LiNiCoMO; and 0.018m+0.003f≤z≤0.02m+0.02f is satisfied.

Positive electrode active material composition, positive electrode plate, battery, and electric apparatus

This application provides a non-aqueous electrolyte and a preparation method thereof, and a secondary battery and an electric apparatus containing the same. The non-aqueous electrolyte contains the non-aqueous solvent and lithium ions, first cations, and first anions dissolved therein, where the first cation is a metal cation Meother than the lithium ion, n representing a chemical valence of the metal cation; the first anion is a tetrafluoroborate anion BF; mass concentration of the first cations in the non-aqueous electrolyte is D1 ppm, and mass concentration of the first anions in the non-aqueous electrolyte is D2 ppm, both based on total mass of the non-aqueous electrolyte; and the non-aqueous electrolyte satisfies that D1 is 0.1 to 1250 and that D1/D2 is 0.02 to 2. The non-aqueous electrolyte in this application enables the secondary battery to have good cycling performance, safety performance, and kinetic performance.

Non-aqueous electrolyte and preparation method thereof, and secondary battery and electric apparatus containing same

A capsule includes two membranes arranged in the capsule and configured to partition an interior of the capsule into a plurality of independent accommodation cavities, and a plurality of fragile structures comprising a first fragile structure, a second fragile structure, and a third fragile structure. A packaging strength of the first fragile structure is greater than a packaging strength of the second fragile structure. The packaging strength of the second fragile structure is greater than a packaging strength of the third fragile structure.

Tank, battery cell, battery, and electrical device

The present application discloses a battery cell, a battery and a power consumption apparatus. The battery cell may include: a housing filled with an electrolyte inside; at least one core assembly arranged in the housing and at least one closed liquid bladder holding another electrolyte, the liquid bladder being arranged in the housing, and at least being provided corresponding to a side wall of the core assembly; at least one weakened structure being provided on the liquid bladder. Under a condition that a pressure in the liquid bladder reaches a threshold value, the another electrolyte in the liquid bladder may break through the weakened structure and flow out of the liquid bladder.

Battery cell, battery and power consumption apparatus

A secondary battery includes a positive electrode plate. that includes a positive current collector, a first positive active material layer distributed on one side of the positive current collector, and a second positive active material layer distributed on an other side of the positive current collector and a negative electrode plate that includes a negative current collector, a first negative active material layer distributed on one side of the negative current collector and opposite to the second positive active material layer, and a second negative active material layer distributed on an other side of the negative current collector. A resistance of the first positive active material layer is R1, a resistance of the second positive active material layer is R2, a resistance of the first negative active material layer is R3, a resistance of the second negative active material layer is R4.

Secondary battery, battery module, battery pack, and electrical device

An electrode assembly, secondary battery, battery module, battery pack and electrical device are provided. In some embodiments, the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separator disposed between the positive electrode plate and the negative electrode plate, the positive electrode plate satisfies 0<CAP1/CAP2<1, in which CAP1 represents capacity of the first positive electrode film layer in Ah, CAP2 represents capacity of the second positive electrode film layer in Ah, and the electrode assembly satisfies R/R−R/R≥0, in which Rrepresents resistance of the first positive electrode film layer in Ω, Rrepresents resistance of the second positive electrode film layer in Ω, Rrepresents resistance of the first negative electrode film layer in mΩ and Rrepresents resistance of the second negative film layer in mΩ. The present applicant may extend the cycle life of the secondary battery.

Electrode assembly, secondary battery, battery module, battery pack and electrical device

An electrode assembly, secondary battery, battery module, battery pack and electrical device are provided. In some embodiments, the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separator disposed between the positive electrode plate and the negative electrode plate, the positive electrode plate satisfies CAP1=CAP2, in which CAP1 represents capacity of the first positive electrode film layer in Ah, CAP2 represents capacity of the second positive electrode film layer in Ah, and the electrode assembly satisfies |R/R−R/R|>0, in which Rrepresents resistance of the first positive electrode film layer in Ω, Rrepresents resistance of the second positive electrode film layer in Ω, Rrepresents resistance of the first negative electrode film layer in mΩ and Rrepresents resistance of the second negative film layer in mΩ. The present applicant may extend the cycle life of the secondary battery.

A charging method for a secondary battery including a lithium-supplementing material. The method includes acquiring a first state of health of the secondary battery in response to the secondary battery being at a preset charging node, activating the lithium-supplementing material in response to the first state of health being less than or equal to a first threshold to supplement lithium for the secondary battery, performing a charging process on the secondary battery, determining a second state of health of the secondary battery based on a working parameter of the secondary battery in the charging process, and charging the secondary battery in response to the second state of health being greater than a second threshold.

Charging method for secondary battery, charging apparatus for secondary battery, charging device, and computer storage medium

This application discloses a battery unit. The battery unit includes a housing, at least one cell, and a buffer. The at least one cell is accommodated in the housing, the buffer is disposed corresponding to a side wall of the cell, and the buffer is provided with an accommodating cavity. A periphery of the accommodating cavity includes at least one packaging structure, the packaging structure includes at least one level of packaging region with a predetermined length. When pressure in the accommodating cavity exceeds packaging strength of the packaging structure, the packaging region is opened to form a buffer space that communicates with the accommodating cavity, reducing influence caused by swelling of the cell.

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Ningde, China

Jianfu He