Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (Hong Kong) Limited

Contemporary Amperex Technology Limited

Liye Li

Peipei Chen

Hailin Zou

Chengdu Liang

Changlong Han

Chenghua Fu

Zeli Wu

Cuiping Zhang

Ming Zhang

Limei Zhang

Chang Peng

This application provides a lithium-ion battery, including: an electrode assembly and an electrolytic solution. The lithium-ion battery may satisfy the following condition:0.6≤α≤0.9, and 4≤×α/β1≤25, where, α=La/Lc, La is an arc length of a convex surface of the negative current collector corresponding to a concave surface of an innermost first circle of positive electrode in a jelly-roll structure of the electrode assembly, Lc is an arc length of a concave surface of an innermost first circle of positive current collector in the jelly-roll structure of the electrode assembly, and La and Lc are measured in mm; w is a percent of the first lithium salt LiR(SON)SORby mass in the electrolytic solution; and β1 is a thickness of the metallic conductive layer in the positive current collector, measured in μM.

Lithium-ion battery, battery module, battery pack, and electrical device

The application provides a secondary battery and a device including the same. The second battery includes: a negative electrode plate, the negative electrode plate including a negative active material; a separation film, the separation film including a base material and a coating arranged on at least one surface of the base material; and an electrolyte, the electrolyte including an organic solvent, where the negative active material includes a silicon-based material and a carbon material; thickness of the base material of the separation film is 7 &#x3bc;m&#x2dc;12 &#x3bc;m; and the organic solvent includes ethylene carbonate, and a weight ratio of the ethylene carbonate in the organic solvent is &#x2264;20%. The secondary battery and the device including the same, which are provided by the application, in the premise of having high energy density, can also have good high-temperature cycle performance, good high-temperature storage performance, and low low-temperature direct current resistance.

Secondary battery and device including the same

The present application relates to a lithium ion battery, comprising: a positive electrode plate, a negative electrode plate, a separator disposed between the positive electrode plate and the negative electrode plate, and an electrolytic solution, the positive electrode plate including a positive electrode current collector and a positive electrode active material layer provided on at least one side of the positive electrode current collector, and the electrolytic solution including an organic solvent, a lithium salt and an additive, wherein the lithium salt comprises a primary lithium salt, the primary lithium salt is a first compound in an amount of 30% or more relative to the total molar amount of the lithium salt, and the first compound has a structure represented by the following formula I, and wherein the additive comprises a second compound represented by the following formula II. 

Lithium ion battery and relevant battery module, battery pack and apparatus

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Ningde, China

Liye Li