Contemporary Amperex Technology (Hong Kong) Limited

Contemporary Amperex Technology Co., Ltd.

Haiyi Hong

Haizu Jin

Na Liu

Cong Cheng

Yuanyuan Lan

Jianrui Yang

The present application relates to a separator, comprising a substrate and a coating formed on at least one surface of the substrate; wherein the coating comprises inorganic particles and organic particles, the organic particles comprise first organic particles and second organic particles both embedded in the inorganic particles and forming protrusions on the surface of the coating, the first organic particles have a number-average particle size of ≥8 μm; the second organic particles have a number-average particle size of ≥2 μm, and at least part of the second organic particles comprise a core structure and a shell structure. The present application also relates to a secondary battery comprising the separator, a device comprising the secondary battery and a method for preparing the separator.

Separator, preparation method therefor and related secondary battery, battery module, battery pack and device

A separator, comprising a substrate and a coating provided on at least one surface of the substrate are provided. In some embodiments, the coating comprises inorganic particles and organic particles, the organic particles comprise first organic particles and second organic particles both embedded in the inorganic particles and forming protrusions on the surface of the coating; the first organic particles are secondary particles, and the number of the first organic particles in the coating is denoted as A; the second organic particles are primary particles and the number of the second organic particles in the coating is denoted as B; with the separator satisfying: 0.05≤A/B<1. The present application also relates to a method for preparing the separator, as well as a secondary battery comprising the separator, a battery module, a battery pack and a device.

The present application relates to a separator, comprising a substrate and a coating formed on at least one surface of the substrate; wherein the coating comprises inorganic particles and organic particles, the organic particles comprise first organic particles and second organic particles; the first organic particles and the second organic particles are embedded in the inorganic particles and form protrusions on the surface of the coating; the first organic particles have a number-average particle size of >10 μm, and the second organic particles have a number-average particle size of 2 μm-10 μm. The present application also relates to a secondary battery comprising the separator, a device comprising the secondary battery and a method for preparing the separator.

The present application relates to a separator, comprising a substrate and a coating formed on at least one surface of the substrate, wherein the coating comprises inorganic particles and first organic particles embedded in the inorganic particles and forming protrusions on the surface of the coating, and the first organic particles have a primary particle morphology and a number-average particle size of ≥2 μm. The present application also relates to a secondary battery comprising the separator, a device comprising the secondary battery and a method for preparing the separator.

Separator, secondary battery comprising same and related battery module, battery pack and device

This application relates to a separator, including a substrate and a coating layer provided on at least one surface of the substrate. The coating layer includes organic particles and inorganic particles, the organic particles include first-type organic particles, the inorganic particles form an inorganic particle layer, and the first-type organic particles are embedded into the inorganic particle layer and form bulges on a surface of the inorganic particle layer. A number-based median particle size of the first-type organic particles is ≥12 μm, and a ratio of an average height of the bulges to a thickness of the inorganic particle layer is ≥4. This application further relates to a separator preparation method, a secondary battery containing such separator, and a related battery module, battery pack, and apparatus.

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Ningde, China

Haiyi Hong