Battery
AssigneeZhuhai Cosmx Battery Co., Ltd.
InventorsJiao Li, Jialin Fang
Life of this patent
Estimating the term…
Abstract
The disclosure provides a battery, including a first electrode plate and a separator, the first electrode plate including a first current collector and a first coating located on a surface of the first current collector. The first coating is connected to the separator, and a surface of the first coating is provided with a recess, and an air permeability S of the separator and a width L of the recess satisfy: 5000 μm·sec/100 cc≤S×L≤75,000 μm·sec/100 cc, where S is in sec/100 cc and L is in μm. The disclosure can improve the rate capability of the battery while reducing the voltage drop of the battery and reducing the risk of short circuit.
Claims20
A battery, comprising a first electrode plate and a separator, the first electrode plate comprising a first current collector and a first coating located on a surface of the first current collector, wherein the first coating is connected to the separator, and a surface of the first coating is provided with a recess;
- wherein the first electrode plate is a negative electrode plate, and the first coating comprises a first active material;
- the first coating comprises a first sublayer, and a second sublayer located on a side of the first sublayer facing away from the first current collector;
- the first active material in the second sublayer comprises a silicon-based material, the silicon-based material comprises a silicon-carbon material, and a mass ratio a of silicon to carbon of the silicon-carbon material and a depth h of the recess satisfy 0.004 μm−1≤a/h≤0.2 μm−1, wherein h is in μm.
Dependencies are inferred from the claim text.