Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (Hong Kong) Limited

Contemporaty Amperex Technlogy Co., Limited

Contemporary Amperex Technology Limited

Haizu Jin

Zhenhua Li

Dongyang Shi

Fei Hu

Yonghuang Ye

Peng Wang

Chengdu Liang

Qian Liu

Xing Li

Ning Chen

Yongshou Lin

Yuanbao Chen

Quanguo Li

Hu Xu

Xiaowen Zhang

Yuqun Zeng

Rui Yang

Kaijie You

Xiaofu Xu

Xingdi Chen

Linggang Zhou

Na Liu

Xinxiang Chen

Cong Cheng

Wenwei Chen

Yuanyuan Lan

Yulian Zheng

Fenggang Zhao

Quankun Li

Chengyou Xing

Wei Li

Zhijun Guo

Xinxin Du

Qingkui Chi

Wenlin Zhou

Jianfu He

Kai Wu

Yanhuo Xiang

Huasheng Su

Yuepan Hou

Mu Qian

Zhanyu Sun

Yu Yan

Yu Tang

Yongguang Wang

Shoujun Huang

Jian Guo

Jianxiong Yang

Lingbo Zhu

Jinmei Xu

Jiang Liu

Jianrui Yang

Haiyi Hong

Yanjie Zhao

Jianghui Lin

Miaomiao Ren

Denghua Lin

Baiqing Li

Liangfan Xu

Jiandong Yang

Siying Huang

Jun Ma

Kun Fang

Xia Hu

Jingxuan Sun

Fajun Huang

Xueyang Sun

Zhisheng Chai

Hui Gu

Jing Zhang

Wenjie Yu

Ziyuan Li

Daichun Tang

Yu Luo

Mingdi Xie

Ting Li

Huihui Shangguan

Shaojun Niu

Ziyu Bai

Xiangyan Bu

Songjun Shi

Ziyu Yang

Honggang Yu

Ruihuan Qin

Yongbin Wu

Weilong Lin

Youlei Lai

Long Xu

Dongsheng Sun

Yunjian Ma

Donglai Zheng

Bing Chen

Shutao Song

Chenxu Luo

Mengqin Zhang

Qiang Guo

Longqing Peng

Tian Wu

Huaichao Tang

Qingsong Xie

Embodiments of the present application provide an electrode assembly, a battery cell, a battery, and a method and a device for manufacturing an electrode assembly. The electrode assembly includes a first electrode plate and a second electrode plate. The first electrode plate and the second electrode plate are wound along a winding direction to form a winding structure, and the winding structure includes a bending region. The first electrode plate includes a first segment that exceeds a winding starting end of the second electrode plate, and at least a part of the first segment is configured to provide a support force to a part of the first electrode plate and the second electrode plate in the bending region and located at an outer side the first segment, making a structure of the first electrode plate and the second electrode plate more compact in the bending region.

Electrode assembly, battery cell, battery, and method and device for manufacturing electrode assembly

A separator, comprising a substrate and a coating provided on at least one surface of the substrate are provided. In some embodiments, the coating comprises inorganic particles and organic particles, the organic particles comprise first organic particles and second organic particles both embedded in the inorganic particles and forming protrusions on the surface of the coating; the first organic particles are secondary particles, and the number of the first organic particles in the coating is denoted as A; the second organic particles are primary particles and the number of the second organic particles in the coating is denoted as B; with the separator satisfying: 0.05≤A/B<1. The present application also relates to a method for preparing the separator, as well as a secondary battery comprising the separator, a battery module, a battery pack and a device.

Separator, preparation method therefor and related secondary battery, battery module, battery pack and device

The present application relates to a separator, comprising a substrate and a coating formed on at least one surface of the substrate; wherein the coating comprises inorganic particles and organic particles, the organic particles comprise first organic particles and second organic particles both embedded in the inorganic particles and forming protrusions on the surface of the coating, the first organic particles have a number-average particle size of ≥8 μm; the second organic particles have a number-average particle size of ≥2 μm, and at least part of the second organic particles comprise a core structure and a shell structure. The present application also relates to a secondary battery comprising the separator, a device comprising the secondary battery and a method for preparing the separator.

An electrode assembly, a battery cell, a battery, and a method and device for manufacturing an electrode assembly are provided. In some embodiments, the electrode assembly includes a positive electrode plate and a negative electrode plate. The positive electrode plate and the negative electrode plate are wound or folded to form a bend region. The positive electrode plate includes a plurality of bend portions located in the bend region. Each bend portion includes a positive current collecting layer and a positive active material layer. The positive current collecting layer is coated with the positive active material layer on at least one surface in a thickness direction of the positive electrode plate. A barrier layer is disposed between the positive current collecting layer and the positive active material layer.

Provided are a battery charging method and device, and a storage medium that are applicable to a lithium-ion battery with an N/P range of 0.5 to 1.1. The method includes: obtaining, by a power management system, a state of health (SOH) loss of the lithium-ion battery; and determining a charge cut-off voltage of a next charge process based on the SOH loss, an initial charge cut-off voltage of the lithium-ion battery, and a voltage correction factor, where the initial charge cut-off voltage is determined based on the N/P, and the charge cut-off voltage increases with increase of a count of charging. The N/P range is 0.5 to 1.1, thereby reducing the dosage of the negative electrode and reducing cost. In addition, the charge cut-off voltage of the next charge process is increased based on the SOH loss, thereby ensuring that the lithium-ion battery is free from lithium plating.

Battery charging method and device, and storage medium

An electrode assembly and a battery cell is disclosed. The electrode assembly includes a first electrode plate and a second electrode plate. The first electrode plate includes a first current collector and a first active material layer, the first current collector includes a first main body and a first tab, and the first tab extends from one end of the first main body in a longitudinal direction. The second electrode plate includes a second current collector and a second active material layer, the second current collector includes a second main body and a second tab, the second tab extends from one end of the second main body in the longitudinal direction, and the second active material layer is applied on a surface of the second main body.

Electrode assembly and battery cell

This application provides a battery cell, a battery, and an electric apparatus. The battery cell includes: an electrode assembly, including a body portion and a first tab. A first size Lof the body portion in a length direction thereof is greater than a second size Lof the body portion in a width direction thereof. The first tab is located on at least one end of the body portion in the width direction. The first tab has a third size Lin the length direction. The first size L, the second size L, and the third size Lsatisfy 0.5L≤L≤L. The battery cell according to an embodiment of this application is intended to resolve a technical problem of severe heat generation by a tab.

Battery cell, battery, and electric apparatus

The present disclosure relates to a secondary battery and a battery module. The secondary battery includes a case including a receiving space with an opening; a cap assembly connected to the case and close the opening; an electrode assembly disposed in the receiving space and including two end faces opposite to each other in a first direction perpendicular to an axial direction of the receiving space, and tabs extending from the end faces and two or more electrode units stacked in the axial direction; and a current collecting unit, including a first piece extending in the axial direction and a first current collecting piece connected to the first piece, the tab extends in the first direction and is connected to the first current collecting piece, and a portion of the tab connected to the first current collecting piece and the first current collecting piece are stacked in the axial direction.

Secondary battery and battery module

A battery cell is disclosed, including a housing, electrode terminals, and a protective member. The housing includes a wall portion and a fastener, where the fastener comprises a connecting portion and a pressing portion that together define a cavity. At least part of the electrode terminals is positioned within the cavity. The protective member includes a first protective portion covering the connecting portion and a second protective portion covering the pressing portion. The second protective portion extends beyond the pressing portion in a first direction. The structure reduces the likelihood of short circuits by shielding the pressing portion, thereby enhancing battery cell reliability.

Battery cell comprising protective member for preventing short circuit, battery comprising the battery cell, and electric apparatus comprising the battery

A battery cell includes: a housing, wherein an opening is provided at an end portion of the housing; an electrode assembly arranged inside the housing, the electrode assembly including an electrode body and a first tab, the first tab being leaded from one end of the electrode body; an end cap closing the opening, the outer periphery of the end cap being fixed to the housing by welding; and a conductive piece located between the electrode assembly and the end cap, the conductive piece being electrically connected to the first tab, the conductive piece being electrically connected to at least one of the end cap and the housing, and an outer edge of the conductive piece extending at a position close to a welding region.

Battery cell having conductive piece close to welding region

A battery cell includes a housing, an electric terminal disposed on the housing, and an electrode assembly accommodated in the housing. The electrode assembly includes a main body portion and a tab extending out of an end face of the main body portion and including a first connecting portion configured to be connected to the electrode terminal and a second connecting portion configured to be connected to the main body portion. Along a length direction of the end face, at least part of the first connecting portion exceeds the second connecting portion. As the first connecting portion exceeds the second connecting portion in the length direction of the end face, the connectable range of the first connecting portion in the length direction of the end face can be expanded, facilitating direct connection of the first connecting portion with the electrode terminal.

Battery cell, battery, and electric apparatus with tab including two different connecting portions

A battery cell may include: a housing having an opening; an electrode assembly, accommodated in the housing; and an end cap, including a cap body and a protruding structure, where at least a part of the cap body may be disposed around the protruding structure and laser-welded to the housing so that the end cap fits and covers the opening. In a thickness direction of the end cap, the protruding structure may protrude from an inner surface of the cap body toward the electrode assembly, and block a laser beam during welding between the cap body and the housing. A first recess may be formed on the end cap at a position corresponding to the protruding structure, and recessed from an outer surface of the cap body toward the electrode assembly.

Battery cell, method and system for manufacturing same, battery, and electrical device

An electrode assembly includes a first electrode plate and a second electrode plate. The first electrode plate includes a first body portion and a tab. The first body portion has a first end portion in a first direction. The tab is coupled to the first end portion. The second electrode plate includes a second body portion and an insulation portion coupled to the second body portion. The first body portion and the second body portion are stacked in a stacking direction perpendicular to the first direction. The second body portion has a second end portion close to the tab in the first direction. The insulation portion covers at least part of the second end portion so as to separate the tab from the second end portion when the tab is bent.

Electrode assembly, battery cell, battery, and electric apparatus

The present application relates to a positive electrode plate and an electrochemical device. The positive electrode plate comprises a current collector, a positive active material layer and a safety coating disposed between the current collector and the positive active material layer, the safety coating comprising a polymer matrix, a conductive material and an inorganic filler, wherein the polymer matrix is fluorinated polyolefin and/or chlorinated polyolefin and the weight ratio of the polymer matrix to the conductive material is 2 or more. The positive electrode plate may improve the safety performance during nail penetration of the electrochemical device such as a capacitor, a primary battery or a secondary battery.

Positive electrode plate and electrochemical device

An embodiment of the present application provides an electrode assembly, a battery cell, a battery, and a manufacturing method and device for the electrode assembly, which belong to the technical field of batteries. The electrode assembly includes a negative electrode plate and a positive electrode plate. The negative electrode plate includes a negative active material layer located in the straight area, and the positive electrode plate includes a positive active material layer located in the straight area. A first direction is perpendicular to an axial direction of a winding structure. The negative active material layer includes a negative electrode main body portion and negative electrode edge portions located on both sides of the negative electrode main body portion. The electrode assembly of this structure can effectively reduce the risk of lithium plating and improve the safety of the battery.

Electrode assembly, battery cell, battery, manufacturing method and device for electrode assembly

Growing community of inventors

Ningde, China

Haizu Jin