Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (hong Kong) Limited

Contemporary Amperex Technology Limited

Yonghuang Ye

Qian Liu

Haizu Jin

Quanguo Li

Chengdu Liang

Jianfu He

Xiaofu Xu

Wei Li

Xia Hu

Wanqiu Meng

Fajun Huang

Xueyang Sun

Chenghua Fu

Jingxuan Sun

Baozhen Wu

Yuwen Wang

Peng Wang

Yulian Zheng

Shaocong Ouyang

Wenwei Chen

Tao Zhang

Xiaoxi Zhang

Miaomiao Dong

Xingyan You

Kai Wu

Yao Jiang

Yu Yan

Xin Sun

Baoyun Xu

Guangjun Wang

Shaojun Niu

Tingzhen Xie

Songjun Shi

Wen Chang

Wenzhong Liu

Yiyang Wu

Longfei Xue

Wenlong Bai

Wei Zheng

Xingbu Chen

Xinyu Zhang

Chan Liao

Jun Peng

Jianfu Pan

Yibo Shang

Yiming Qin

Dong Pan

Jiawel Zheng

Yan Zhang

Wenge Han

Chenxu Luo

Suogang Guo

Chang Zhu

Renjie Pei

Peidong Song

Xuan Li

Liang Yun

Lili Wu

Chenhui Lin

Rundie Liu

Jiawei Zheng

Chenchen Zhang

The present application provides a composite negative electrode active material and a preparation method therefor, a negative electrode plate comprising same, a secondary battery and a power consuming device. The composite negative electrode active material comprises a negative electrode active material substrate and a conductive polymer layer on the surface of the negative electrode active material substrate, wherein the cyclic voltammetry curve of the composite negative electrode active material has an oxidation peak within a range of 3.2 V-3.6 V and a reduction peak within a range of 2.1 V-2.6 V. The composite negative electrode active material provided by the present application can combine a low volume expansion, a high capacity per gram and a high initial coulombic efficiency, thus enabling a secondary battery to combine a low volume expansion, a high energy density and a long cycle life.

Composite negative electrode active material and preparation method therefor, negative electrode plate comprising same, secondary battery, and power consuming device

Embodiments of the application provide a cover assembly, a battery cell, a battery, an electric device, a method and an apparatus. The cover assembly includes a cover plate, a fixing member, a breathable film and a support, the cover plate being provided with a first through hole, the fixing member being used for being connected to the cover plate and provided with a second through hole, where the second through hole is configured to be in gas communication with the first through hole, the breathable film being connected to the fixing member and used for covering the second through hole, the second through hole being filled with the support, and the support being connected to the fixing member. According to the application, a release requirement of gas in the battery cell can be met, and meanwhile, safety performance of the battery cell can be improved.

Cover assembly, battery cell, battery, electric device, method and apparatus

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

Lithium replenishing spaces are disposed on a current collection structure, such that the lithium replenishing spaces communicate with an active layer on one side; and the battery is replenished with lithium by using lithium replenishing agents in the lithium replenishing spaces to offset an irreversible lithium consumption in a cycle process, so as to increase the total capacity and the energy density of the battery. According to the present application, due to average weights Mof corresponding active materials in different distribution regions on the active layer, a sum V0 of internal volumes of lithium replenishing spaces corresponding to each of the distribution regions is controlled in a positively correlated manner based on a change in the average weights of the active materials in the different distribution regions.

Electrode plate and manufacturing method therefor, electrode assembly, secondary battery, and power consuming device

The present application discloses a secondary battery, a process for preparing the same, and an apparatus including the secondary battery. The secondary battery includes a negative electrode plate, and the negative electrode plate includes a negative electrode current collector and a negative electrode film; the negative electrode film includes a first negative electrode coating layer and a second negative electrode coating layer; the first negative electrode coating layer is disposed on at least one surface of the negative electrode current collector and includes a first negative electrode active material, the first negative electrode active material includes graphite; the second negative electrode coating layer is disposed on a surface of the first negative electrode coating layer and includes a second negative electrode active material, and the second negative electrode active material includes artificial graphite and a silicon-based material.

Secondary battery, process for preparing same, and apparatus comprising secondary battery

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

A battery cell, a battery, an electric apparatus, and a manufacturing method and manufacturing device of battery cell are described. The battery cell includes: an electrode assembly; a casing having an accommodating cavity for accommodating the electrode assembly; an exhaust mechanism provided on the casing, the exhaust mechanism including a connecting component and a breathable component, and the breathable component is configured to discharge gas to outside of the casing when gas pressure inside the casing reaches a threshold; and an electrolyte, filled in the casing; where gas permeability A of the breathable component, conductivity S of the electrolyte, and gas containment space V satisfy 20 mm*ms/cm*ml<AS/V<165 mm*ms/cm*ml, and the gas containment space V is a ratio of a remaining value of volume of the accommodating cavity minus volume of the electrolyte and volume of the electrode assembly to capacity of the electrode assembly.

Battery cell, battery, electric apparatus, and manufacturing method and device of battery cell

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

An electrode assembly includes a negative electrode plate, a positive electrode plate, and a separator disposed between the negative electrode plate and the positive electrode plate. The negative electrode plate, the positive electrode plate, and the separator are wound together around a winding axis to form the electrode assembly. The negative electrode plate is a continuous negative electrode plate extending from a foremost winding end to a hindmost winding end along a winding direction. The positive electrode plate includes a continuous positive electrode plate disposed along the winding direction as well as a single-sheet positive electrode plate and/or a long-sheet positive electrode plate disposed along the winding direction apart from the continuous positive electrode plate.

Electrode assembly, battery cell, battery, and electrical device

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

Growing community of inventors

Fujian, China

Yonghuang Ye