Cylindrical battery cell, battery device, electric device

By optimizing the material and structural design of the negative and positive electrode plates, the cylindrical battery cell has good fast-charging cycle performance on the basis of high energy density, solving the problems of electrode component volume expansion and poor electrolyte wettability, and improving the charging and discharging efficiency of the battery.

CN122436441APending Publication Date: 2026-07-21CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Filing Date
2026-06-23
Publication Date
2026-07-21

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Abstract

The present disclosure provides a cylindrical battery monomer, a battery device, and a power consumption device. The cylindrical battery monomer comprises a negative electrode sheet and a positive electrode sheet. The negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer. The negative electrode film layer comprises a negative electrode active material. The negative electrode active material comprises a silicon-based material and a graphite material. The silicon-based material comprises Si elements. The mass percentage of the Si elements is 0.5% or more based on the mass of the negative electrode film layer. The positive electrode sheet comprises a positive electrode current collector and a positive electrode film layer. The positive electrode film layer comprises a positive electrode active material. The positive electrode active material comprises a lithium transition metal oxide. The lithium transition metal oxide comprises single-crystal lithium transition metal oxide. The number percentage of the single-crystal lithium transition metal oxide is 80%-100% based on the total number of the lithium transition metal oxide. The compaction density of the positive electrode film layer is 3.1 g / cm 3 to 3.6 g / cm 3 . The cylindrical battery monomer has high energy density and good fast-charging cycle performance.
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