Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (hong Kong) Limited

Contemporary Amperex Technology Limited

Qian Liu

Yonghuang Ye

Chengdu Liang

Haizu Jin

Quanguo Li

Jianfu He

Xiaofu Xu

Jingxuan Sun

Wei Li

Yongsheng Guo

Xia Hu

Fajun Huang

Xueyang Sun

Peng Wang

Yulian Zheng

Shuojian Su

Tao Zhang

Xiaoxi Zhang

Ying Wang

Wanqiu Meng

Wenguang Lin

Xiqing Wang

Longfei Xue

Changlong Han

Yu Yan

Yao Jiang

Zeli Wu

Wenwei Chen

Bin Jiang

Lei Huang

Songjun Shi

Wenzhong Liu

Huiling Chen

Chenhui Lin

Jianfu Pan

Jun Peng

Xinyu Zhang

Liting Huang

Dejun Xiao

Yibo Shang

Jiahua Chen

Yiming Qin

Renjie Pei

Jiadian Lan

Chenxu Luo

Gang Wang

A battery cell, a cover assembly, a battery, an electric apparatus, a method, and a device are provided. The battery cell includes an electrode assembly and a housing to accommodate the electrode assembly. A wall portion of the housing includes a body portion and a fastener, the fastener is provided with a recess communicating with the outside, and the recess is arranged on an inner surface of the fastener facing the electrode assembly and recessed in a direction leaving the electrode assembly. An air-permeable member covers the recess, and the air-permeable member is configured to allow gas to be discharged to the outside of the housing through the recess when a gas pressure inside the housing reaches a threshold. A bottom wall of the recess is provided with a protruding portion extending toward the electrode assembly, and the protruding portion is configured to be attached to the air-permeable member.

Battery cell, cover assembly, battery, electric apparatus, method, and device

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

The present application discloses a positive electrode active material and its preparation method, a sodium ion battery and an apparatus containing the sodium ion battery. The positive electrode active material satisfies a chemical formula NaCuMnMO, wherein M is one or more selected from Li, B, Mg, Al, K, Ca, Ti, V, Cr, Fe, Co, Ni, Zn, Ga, Sr, Y, Nb, Mo, Sn, Ba and W, 0≤x≤0.5, 0.1<h≤2, 1≤k≤3, 0≤l≤0.5, and 0≤y≤1, 2≤h+k+l≤3.5, and 0.57≤(2+x)/(h+k+l)≤0.9.

Positive electrode active material and its preparation method, sodium ion battery and apparatus containing the sodium ion battery

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

This application provides a positive electrode active material, a method for preparing a positive electrode active material, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The positive electrode active material includes a first positive electrode active material and a second positive electrode active material. The first positive electrode active material includes a compound LiNiCoMnM'O, and the second positive electrode active material includes a core, a first coating layer enveloping the core, and a second coating layer enveloping the first coating layer, where the core includes a compound LiMnAPRO, the first coating layer includes pyrophosphate MPOand phosphate XPO, and the second coating layer includes carbon.

Positive electrode active material, method for preparing positive electrode active material, positive electrode plate, secondary battery, battery module, battery pack, and electric apparatus

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 battery module including a first-type battery cell and a second-type battery cell at least connected in series, where the first-type battery cell and the second-type battery cell are battery cells of different chemical systems, the first-type battery cell includes N first battery cell(s), and the second-type battery cell includes M second battery cell(s), where N and M are positive integers; and when a battery state of health (SOH) of a first battery cell is the same as an SOH of a second battery cell, and a state of charge (SOC) of the first battery cell is the same as an SOC of the second battery cell, a ratio of a total charge capacity of a first negative electrode sheet of the first battery cell to a total charge capacity of a second negative electrode sheet of the second battery cell is 0.8 to 1.2.

Battery module, battery pack, power consumption apparatus, and manufacturing method and manufacturing device of battery module

The present application provides a battery module, an apparatus, a battery pack, and a method and device for manufacturing the battery module. The battery module includes: a first-type battery cell and a second-type battery cell, which are connected in series, the first-type battery cell and the second-type battery cell are battery cells of different chemical system, and the volume energy density of the first-type battery cell is less than the volume energy density of the second-type battery cell; and the capacity Capof the first-type battery cell is greater than the capacity Capof the second-type battery cell. While ensuring the safety performance of the battery module, the service life and the energy throughput of the battery module are effectively improved.

Battery module, apparatus, battery pack, and method and device for manufacturing battery module

The present application relates to a battery module, including a first-type battery cell and a second-type battery cell electrically connected at least in series, the first-type battery cell and the second-type battery cell are battery cells of different chemical systems, the first-type battery cell includes N first battery cell(s), the second-type battery cell includes M second battery cell(s); the first battery cell includes a first negative electrode plate, the second battery cell includes a second negative electrode plate, a ratio of a conductivity of an electrolyte solution (25° C.) of the first battery cell to a coating mass per unit area of the first negative electrode plate is denoted as M1, and a ratio of a conductivity of an electrolyte solution (25° C.) of the second battery cell to a coating mass per unit area of the second negative electrode plate is denoted as M2, M1>M2, and 0.08≤M1≤11, 0.03≤M2≤4.62.

Battery module, battery pack, electrical apparatus, and manufacturing method and manufacturing device of battery module

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

This application provides a battery, an apparatus, a preparation method of battery, and a preparation apparatus of battery. The battery includes a first battery cell, a second battery cell, and a first thermal insulation member. The second battery cell is disposed adjacent to the first battery cell, an energy density of the second battery cell is less than that of the first battery cell, and the first thermal insulation member is disposed between the first battery cell and the second battery cell.

Battery, apparatus, and preparation method and preparation apparatus of battery

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.

An exhaust apparatus, a battery cell, a battery, and an electric apparatus, are provided. The exhaust apparatus includes an exhaust body and an exhaust mechanism, where the exhaust mechanism includes a connection member and a ventilation member that are provided on the exhaust body, the connection member is configured to connect the exhaust body, the connection member is provided with a plurality of first through holes, the ventilation member covers the plurality of first through holes, and the ventilation member is configured to, when a pressure of gas inside a battery cell reaches a first threshold, exhaust the gas to the outside of the battery cell through the plurality of first through holes.

Exhaust apparatus, battery cell, battery, and electric apparatus

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Ningde, China

Qian Liu