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US 2022/0102700 A1Published application
Secondary battery and battery module, battery pack and apparatus containing the same
AssigneeContemporary Amperex Technology Co., Limited
InventorsJianjun MA, Libing He, Rui Shen
Life of this patent
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Abstract
This application discloses a secondary battery, and a battery module, a battery pack and an apparatus containing the secondary battery. The secondary battery has a positive and negative electrodes having specific positive and negative active materials respectively, such that the secondary battery may have improved dynamic performance and at the same time have better cycle performance at high temperature and safety performance.
Claims20
A secondary battery, including
- a positive plate, including a positive current collector and a positive film arranged on at least one surface of the positive current collector and including a positive active material, the positive active material comprising one or more of layered lithium transition metal oxides and the modified compounds thereof;
- and
- a negative plate, including a negative current collector and a negative electrode film arranged on at least one surface of the negative current collector and including a negative active material, the negative active material comprising a first material and a second material, wherein the first material includes an artificial graphite and the second material includes a natural graphite, and wherein the artificial graphite includes primary particles and secondary particles both, and a number percentage S of the secondary particles in the negative active material satisfies:
- 10%≤S≤50%
1 more element
Dependencies are inferred from the claim text.