Contemporary Amperex Technology (hong Kong) Limited

Contemporary Amperex Technology Co., Ltd.

Jingxuan Sun

Qian Liu

Jianfu He

Yonghuang Ye

Xueyang Sun

Haizu Jin

Xiaofu Xu

Changlong Han

Quanguo Li

Zeli Wu

Bin Jiang

Lei Huang

Huiling Chen

Dejun Xiao

Jiahua Chen

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

The present application relates to a secondary battery, which includes: a cathode sheet, an anode sheet, and an electrolyte; the cathode sheet includes a cathode film layer containing a cathode active material, and the anode sheet includes an anode film layer containing an anode active material; and the secondary battery meets a following function relationship: 0.22≤3×(A1/A2)×(B2−B1)/(B1+B2)≤1.55, the parameters are referred to the description; and an electrical device including the secondary battery. The secondary battery in the present application has both good cycle life and excellent fast charging capacity.

Secondary battery and electrical device

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.

Battery unit, battery, and electric apparatus

Growing community of inventors

Ningde, China

Jingxuan Sun