Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (hong Kong) Limited

Long Wang

Wei Li

Na Liu

Qingrui Xue

Jing Li

Zige Zhang

Miao Jiang

Xinliang Kuang

Yujun Chen

Yaru Zhou

Huan Ni

Kai Wu

Huihui Liu

Yuqian Wen

Qifeng Li

Chengdong Sun

Huan Che

Yi Zheng

Ze Zhong

Xuguang Gao

Wei Liang

Lingyun Feng

Tuo Zheng

Dingshan Ruan

Zhonghong Li

Zhongsi Zhu

Hang Zhou

An electrode plate includes an active material layer, a current collector including an insulating layer and first and second conductive layers sandwiching the insulating layer, and a conductive structure. The conductive structure includes a first conductive member including a first section arranged along a side of the first conductive layer and a second section extending from the first section and beyond the current collector in a direction away from the active material layer, and a second conductive member including a first connecting section connected to the second conductive layer, a bent section connected to the first connecting section and bent towards the first conductive member relative to the first connecting section, and a second connecting section bent backward relative to the bent section to be sandwiched between the first section and the first conductive layer.

Secondary battery and electrode plate

An embodiment of the present application provide an electrode assembly, a battery cell, a battery, and an electrode assembly manufacturing equipment and method. Among that, the electrode assembly includes a negative electrode plate and a positive electrode plate which form a bending region. The positive electrode plate includes bending portions located in the bending region, the bending portion includes a positive electrode current collecting layer and a positive active substance layer, and at least one side surface of the positive electrode current collecting layer is provided with the positive active substance layer in a thickness direction of the positive electrode plate. At least one positive active substance layer is provided with the barrier layer, at least a part of the barrier layer is intercalated in the positive active substance layer provided with the barrier layer, and coats at least a part of particles in the positive active substance layer.

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

The present disclosure relates to a secondary battery and an electrode plate. The electrode plate includes a current collector, an active material layer, a conductive structure, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer includes a main body portion and a protrusion portion. A surface of the main body portion facing away from the insulating layer is covered by the active material layer, while a surface of the protrusion portion facing away from the insulating layer is uncovered by the active material layer. The conductive structure is welded to the protrusion portion and thus a welded zone is formed. The first protective layer has elasticity, and is disposed on a side of the protrusion portion facing away from the insulating layer and is located between the welded zone and the active material layer.

Electrode plate of a secondary battery and a secondary battery

A secondary battery and an electrode plate are provided. The electrode plate includes a current collector, an active material layer, a conductive structure, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer includes a main body portion and a protrusion portion. A surface of the main body portion facing away from the insulating layer is covered by the active material layer, while a surface of the protrusion portion facing away from the insulating layer is uncovered by the active material layer. The conductive structure is welded to the protrusion portion and thus a welded zone is formed. The first protective layer has elasticity, and is disposed on a side of the protrusion portion facing away from the insulating layer and is located between the welded zone and the active material layer.

Secondary battery and electrode plate thereof having insulating layer

The present disclosure provides a secondary battery and an electrode plate. The electrode plate includes a current collector, an active material layer, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer has a main body portion covered by the active material layer and a protrusion portion uncovered by the active material layer. The first protective layer is disposed on a side of the protrusion portion facing away from the insulating layer. The electrode plate further includes a conductive structure, which has a connecting portion fixed on the main body portion, and a first extending portion exceeding an end of the protrusion portion away from the main body portion. The first protective layer is disposed on a side of the connecting portion close to the active material layer along a height direction.

Electrode plate including current collector having conductive layer disposed on insulating layer and protective layer disposed on condutive layer, and battery including the same

The present disclosure provides a modified positive electrode active material. The modified positive electrode active material comprises a positive electrode active material inner core; a metal oxide layer comprising a metal oxide and coated on a surface of the positive electrode active material inner core; and a polymer layer comprising a polymer and coated on a surface of the metal oxide layer, the polymer being one or more selected from a group consisting of polyacrylic acid, polymethyl methacrylate, polyacrylamide and lithium polyacrylate. The modified positive electrode active material of the present disclosure has better structure stability and thermal stability, when the modified positive electrode active material is applied in the electrochemical energy storage device, cycle performance and safety performance of the electrochemical energy storage device can be significantly improved without decreasing energy density of the electrochemical energy storage device.

Modified positive electrode active material, preparation method therefor and electrochemical energy storage device

The present disclosure provides a preparation method of a modified positive electrode active material preparation method, which comprising steps of: dispersing a positive electrode active material matrix into an alcohol solvent to form a positive electrode active material matrix suspension; dissolving an alcohol-soluble aluminum salt in an alcohol solvent to form an alcohol-soluble aluminum salt solution; dissolving an alcohol-soluble phosphorous compound in an alcohol solvent to form an alcohol-soluble phosphorous compound solution; mixing the alcohol-soluble aluminum salt solution and the alcohol-soluble phosphorous compound solution and heating to react, obtaining a liquid-phase coating solution which contains aluminum phosphate after the reaction is finished; mixing and stirring the positive electrode active material matrix suspension and the liquid-phase coating solution which contains aluminum phosphate, extraction filtrating and obtaining a filter cake after the stirring is finished, then drying and baking the filter cake, finally obtaining a modified positive electrode active material.

Preparation method of modified positive electrode active material

The present invention provides a positive electrode material for a lithium ion battery including a nickel-containing positive electrode material and a coating layer coated on the nickel-containing positive electrode material, wherein the nickel-containing positive electrode material has a chemical formula of LiNiMO, 0.5&#x2264;x&#x2264;1, M is at least one of Co, Mn and Al, and the coating layer contains lithium vanadium phosphate and silica. Compared with the prior art, the coating layer containing lithium vanadium phosphate and silica coated on the nickel-containing positive electrode material of the present invention can remarkably improve the dynamic performances and the cycle performances at high voltage of the lithium ion battery. In addition, the present invention also provides a method for preparing the positive electrode material a lithium ion battery containing the positive electrode material.

Positive electrode material for lithium ion battery, method for preparing the same and lithium ion battery

The present application relates to the technical field of Li-ion battery and, more particularly, to a positive electrode material for a Li-ion battery, a method for preparing the same, and a Li-ion battery containing the same. The positive electrode material for a Li-ion battery includes a substrate material and a coating layer coated on a surface of the substrate material, wherein the coating layer includes boron, a chemical formula of the substrate material is LiNiCoMnO, wherein 0.99&#x3c;x&#x2264;1.1, 0.3&#x3c;a&#x3c;0.9, 0.1&#x3c;b&#x3c;0.4, 0.1&#x3c;c&#x3c;0.4, and a+b+c=1; and the substrate material consists of a large particle substrate material and a small particle substrate material. In the present application, by gradation of large particles and small particles, the pellet density, the capacity density, the room-temperature cycle performance, the high-temperature cycle performance and low temperature discharging performance of the Li-ion battery are improved.

Positive electrode material for Li-ion battery, method for preparing the same, and Li-ion power battery containing the same

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Ningde, China

Long Wang