Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (hong Kong) Limited

Contemporary Amperex Technology Limited

Xinxin Du

Chengdu Liang

Fuping Luo

Shengwei Wang

Daichun Tang

Huihui Shangguan

Ziyu Bai

Xin Fu

Ruihuan Qin

Haizu Jin

Chuanmiao Yan

Wenzhu Xu

Zhimin Dan

Yuqun Zeng

Xiyang Zuo

Xing Li

Hu Xu

Jiao Cao

Honggang Yu

Qiaoge Wang

Songjun Shi

Tiancong Wang

Manfang Zhang

Yanyun Tan

Jun Ni

Bing Chen

Shutao Song

Yang Hu

Xitong Wang

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 embodiments of the present application provide a winding type electrode assembly including a positive electrode plate and a negative electrode plate; the positive electrode plate includes a first positive winding end portion and a positive winding middle section; the negative electrode plate includes a first portion and a second portion; and an active material layer of the negative electrode plate exceeds an active material layer of the positive electrode plate, and a difference between a maximum width of a negative active material layer of the first portion and a minimum width of a positive active material layer of the first positive winding end portion is larger than a difference between a maximum width of a negative active material layer of the second portion and a minimum width of a positive active material layer of the positive winding middle section.

Winding type electrode assembly, battery cell, battery and power consumption device

The present application provides an electrode assembly, a batter cell, a battery, an electric apparatus, and a manufacturing method and device of the electrode assembly. A negative plate of the electrode assembly includes a plurality of first negative active material layers located in an abutting region, and a plurality of second negative active material layers located in a non-abutting region; a positive plate of the electrode assembly includes a plurality of first positive active material layers located in the abutting region, and a plurality of second positive active material layers located in the non-abutting region. An active material capacity per unit area of the first negative active material layer is greater than that of the second negative active material layer; and/or an active material capacity per unit area of the first positive active material layer is less than that of the second positive active material layer.

Electrode assembly, battery cell, battery and electric apparatus

The present disclosure provides a lithium-ion battery, the lithium-ion battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte, the positive active material comprises a layered lithium-containing compound, the negative active material comprises graphite, the positive film and the negative film satisfy a relationship 0.3≤(OI×PD)/(OI×PD)≤20.0. The present disclosure can make the lithium-ion battery have smaller swelling and higher charging capability, and also make the lithium-ion battery have excellent cycle life and excellent safety performance during the long-term fast charging process.

Lithium-ion battery of fast-charging capability

An electrode sheet and a secondary battery comprising the same are provided. The electrode sheet comprises a current collector and an active material layer provided on at least one surface of the current collector. A first inorganic separation layer and a second inorganic separation layer are sequentially formed on the active material layer. The first inorganic separation layer comprises a plurality of pores having a diameter of 300 nm to 600 nm, and each of the plurality of pores extends from the first inorganic separation layer toward the second inorganic separation layer and penetrates through the second inorganic separation layer. The pore diameter of the pores in the second inorganic separation layer is uniform.

Electrode sheet and secondary battery comprising the same

An electrode assembly includes a positive electrode plate and a negative electrode plate wound or stacked to form a bend region, and a barrier layer provided at the bend region. At least part of the barrier layer is located between the positive electrode plate and the negative electrode plate that are adjacent to each other, and is configured to prevent at least part of ions deintercalated from the positive electrode plate from being intercalated into the negative electrode plate in the bend region.

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

The present disclosure provides a lithium-ion battery, the lithium-ion battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte. The positive active material comprises a material having a chemical formula of LiNiCoMO, the negative active material comprises a graphite-type carbon material, the lithium-ion battery satisfies a relationship 58%&#x2264;KY/(KY+KY)&#xd7;100%&#x2264;72%. In the present disclosure, by reasonably matching the relationship between the anti-compression capability of the positive active material and the anti-compression capability of the negative active material, it can make the positive electrode plate and the negative electrode plate both have good surface integrity, and in turn make the lithium-ion battery have excellent dynamics performance and excellent cycle performance at the same time.

Lithium-ion battery

Disclosed are a heating method for a rechargeable battery, a control unit and a heating circuit. The heating method comprises: determining a frequency value of a pulse current for heating the rechargeable battery in response to a heating command of the rechargeable battery; determining a current value of the pulse current according to the frequency value and an acquired state parameter of the rechargeable battery; judging whether the current value satisfies a preset heating demand; if the current value satisfies the heating demand, generating the pulse current under control according to the frequency value; if the current value does not satisfy the heating demand, re-determining the frequency value and the current value of the pulse current. The embodiments of the present disclosure further provide a control unit and a heating circuit.

Heating method for rechargeable battery, control unit and heating circuit

The present disclosure provides a lithium-ion battery, the lithium-ion battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte, the positive active material comprises a layered lithium-containing compound, the negative active material comprises graphite, the positive film and the negative film satisfy a relationship 0.3&#x2264;(OI&#xd7;PD)/(OI&#xd7;PD)&#x2264;20.0. The present disclosure can make the lithium-ion battery have smaller swelling and higher charging capability, and also make the lithium-ion battery have excellent cycle life and excellent safety performance during the long-term fast charging process.

The present disclosure provides a method, apparatus, and device for charging a battery, and storage medium. The method for charging a battery includes acquiring a battery temperature; determining a charging current value Ifor the ncharging stage of the battery, according to the battery temperature and a mapping relationship between different temperature ranges and charging current values I, wherein a preset charging cut-off voltage value Vfor the ncharging stage is greater than V; charging the battery with Iin the jcharging stage; acquiring a voltage value of the battery at the current time; if the voltage value is less than V, continuing to charge the battery with I; if the voltage value is not less than Vand j&#x3c;N, charging the battery with I; if the voltage value is not less than Vand j=N, stopping charging the battery.

Method, apparatus, and device for charging a battery and storage medium

The present disclosure provides a positive electrode plate and a battery, the positive electrode plate comprises a positive current collector and a positive film, the positive film is provided on least one surface of the positive current collector and comprises a positive active material, the positive active material comprises a layered lithium-containing compound, and an OI value of the positive film represented by Cis less than or equal to 150. The positive electrode plate of the present disclosure has smaller swelling and excellent dynamics performance, and the battery of the present disclosure has high safety performance, excellent dynamics performance and long cycle life at the same time.

Positive electrode plate and battery

A method, an apparatus and a device for charging a battery are provided. The method may include: defining a charging current Ifor an Nth charging stage of a charging process based on charging capability of the battery, wherein I&#x3c;I; defining a charge cutoff voltage Vfor the Nth charging stage of the charging process, wherein V&#x3e;Vand Vis smaller than a theoretical charge cutoff voltage V; in case that the N-1th charging stage is not a last charging stage, charging the battery with Iduring the N-1th charging stage and proceeding to the Nth charging stage when a voltage across the battery reaches V; and in case that the N-1 th charging stage is the last charging stage, charging the battery with Iduring the N-1th charging stage and stopping charging when the voltage across the battery reaches V.

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Ningde, China

Xinxin Du