Cell and battery

• US 11,189,884 B2
• Filed: 08/21/2019
• Issued: 11/30/2021
• Est. Priority Date: 10/25/2018
• Status: Active Grant

• Current Assignee: Ningde Amperex Technology Limited
• Original Assignee: Ningde Amperex Technology Limited
• Inventors: Guo, Peipei, He, Ping, Peng, Yejun, Cheng, Wenqiang
• Primary Examiner(s): Dignan, Michael L
• Application Number:
  US16/546,324
• Publication Number:
  US 20200136116A1
• Time in Patent Office: 832 Days
• CPC Class Codes: H01M 50/417 Polyolefins
• CPC Class Codes: H01M 50/449 having a layered structure
• CPC Class Codes: H01M 50/463 Separators, membranes or diaphragms characterised by their shape

Abstract

The present application discloses a cell and a battery, the cell comprising a first electrode, a second electrode, and a first separator and a second separator that are disposed between the first electrode and second electrode, wherein the first separator includes a first meshing structure beyond the first electrode and the second electrode, the second separator includes a second meshing structure beyond the first electrode and the second electrode, and the first meshing structure is meshed with the second meshing structure along a thickness direction of the cell. The cell provided by the present application can improve the dropping performance of the cell and enhance the safe use of cell.

Claims

1. A cell, comprising:

a first electrode;

a second electrode;

a first separator and a second separator disposed between the first electrode and the second electrode;

wherein the first separator comprises a first meshing structure at a peripheral area beyond the first electrode and the second electrode, the second separator comprises a second meshing structure at the peripheral area beyond the first electrode and the second electrode; and

the first meshing structure is meshed with the second meshing structure along a thickness direction of the cell;

wherein the first meshing structure comprises a first protrusion and a first receiving space, and the first receiving space is formed on a back surface of the first protrusion;

the second meshing structure comprises a second protrusion and a second receiving space, and the second receiving space is formed on a back surface of the second protrusion; and

the second protrusion is meshed with the first receiving space, or the first protrusion is meshed with the second receiving space.

2. The cell according to claim 1, wherein the first meshing structure further comprises a third protrusion and a third receiving space, and the third receiving space is formed on a back surface of the third protrusion;

the second meshing structure further comprises a fourth protrusion and a fourth receiving space, and the fourth receiving space is formed on a back surface of the fourth protrusion; and

the third protrusion is meshed with the fourth receiving space.

3. The cell according to claim 2, wherein a convex direction of the first protrusion is opposite to a convex direction of the third protrusion.

4. The cell according to claim 2, wherein a convex direction of the second protrusion is opposite to a convex direction of the fourth protrusion.

5. The cell according to claim 2, wherein the third protrusion is disposed between two adjacent first protrusions.

6. The cell according to claim 1, wherein an opening is formed between the first protrusion and the first separator.

7. The cell according to claim 1, wherein an opening is formed on a top of the first protrusion.

8. The cell according to claim 7, wherein a plurality of openings have a cross-section shape of circular.

9. The cell according to claim 7, wherein a plurality of openings have a cross-section shape of polygonal.

10. The cell according to claim 7, wherein,

the first electrode is a positive electrode and the second electrode is a negative electrode;

or

the first electrode is a negative electrode and the second electrode is a positive electrode.

11. The cell according to claim 1, wherein the first meshing structure has a first maximum thickness;

the first separator has a third thickness at where not provided with the first meshing structure; and

the first maximum thickness is less than the third thickness.

12. The cell according to claim 1, wherein the second meshing structure has a second maximum thickness;

the second separator has a third thickness at where not provided with the second meshing structure; and

the second maximum thickness is less than the third thickness.

13. The cell according to claim 1, wherein the first protrusion and the second protrusion have a cross-sectional shape of any one of a circle shape and a polygon shape in a plane perpendicular to the thickness direction of the cell.

14. The cell according to claim 1, wherein the first protrusion and the second protrusion have a cross-sectional shape of any one of a triangle shape, a trapezoidal shape, a zigzag shape, and an arc shape in a plane perpendicular to a length direction of the cell.

15. The cell according to claim 1, wherein the first meshing structure is disposed discontinuously along a length direction of the cell.

16. The cell according to claim 1, wherein the first meshing structure is disposed continuously along a length direction of the cell.

17. The cell according to claim 1, wherein a plurality of first protrusions have the same shape and same size.

18. The cell according to claim 1, wherein a plurality of first protrusions are convex in a same direction.

19. A battery, comprising a package, an electrolyte and a cell comprising:

a first electrode;

a second electrode;

a first separator and a second separator disposed between the first electrode and the second electrode;

wherein the first separator comprises a first meshing structure at a peripheral area beyond the first electrode and the second electrode, the second separator comprises a second meshing structure at the peripheral area beyond the first electrode and the second electrode; and

the first meshing structure is meshed with the second meshing structure along a thickness direction of the cell;

wherein the first meshing structure comprises a first protrusion and a first receiving space, and the first receiving space is formed on a back surface of the first protrusion;

the second meshing structure comprises a second protrusion and a second receiving space, and the second receiving space is formed on a back surface of the second protrusion; and

the second protrusion is meshed with the first receiving space, or the first protrusion is meshed with the second receiving space.