US-12627006-B2 - Electrode assembly

Abstract

An electrode assembly is provided in the disclosure. The electrode assembly includes a positive electrode and a negative electrode. The positive electrode includes a first insulating layer, a first conductive layer on one surface of the first insulating layer and a second conductive layer on the other surface of the first insulating layer, a first active material layer on a surface of the first conductive layer, and a second active material layer on a surface of the second conductive layer. The negative electrode includes a second insulating layer, a third conductive layer on one surface of the second insulating layer and a fourth conductive layer on the other surface of the second insulating layer, a third active material layer on a surface of the third conductive layer, and a fourth active material layer on a surface of the fourth conductive layer.

Inventors

• Congmiao WU
• Haishi ZENG
• Pan Tang
• Ninghui ZHANG
• Youzhi Zhu

Assignees

• HITHIUM TECH HK LIMITED

Dates

Publication Date

20260512

Application Date

20221011

Priority Date

20211012

Claims (20)

1. 1 . An electrode assembly, comprising a positive electrode and a negative electrode, wherein: the positive electrode comprises a first insulating layer, a first conductive layer on one surface of the first insulating layer and a second conductive layer on the other surface of the first insulating layer, a first active material layer on a surface of the first conductive layer, and a second active material layer on a surface of the second conductive layer; the negative electrode comprises a second insulating layer, a third conductive layer on one surface of the second insulating layer and a fourth conductive layer on the other surface of the second insulating layer, a third active material layer on a surface of the third conductive layer, and a fourth active material layer on a surface of the fourth conductive layer; the positive electrode and the negative electrode which are adjacent to each other are separated by a separator; a current in the first conductive layer of the positive electrode is outputted through a first tab, and a current in the second conductive layer of the positive electrode is outputted through a second tab; a current in the third conductive layer of the negative electrode is outputted through a third tab, and a current in the fourth conductive layer of the negative electrode is outputted through a fourth tab; the first tab and the second tab are staggered, wherein a part of the first conductive layer and a part of the first insulating layer extend beyond the second conductive layer to form the first tab in a height direction of the electrode assembly, and a part of the second conductive layer and a part of the first insulating layer extend beyond the first conductive layer to form the second tab in the height direction of the electrode assembly; the third tab and the fourth tab are staggered, wherein a part of the third conductive layer and a part of the second insulating layer extend beyond the fourth conductive layer to form the third tab in the height direction of the electrode assembly, and a part of the fourth conductive layer and a part of the second insulating layer extend beyond the third conductive layer to form the fourth tab in the height direction of the electrode assembly; and the electrode assembly has a symmetry plane that is parallel to the height direction and a length direction of the electrode assembly, an orthographic projection of the first tab on the symmetry plane, an orthographic projection of the second tab on the symmetry plane, an orthographic projection of the third tab on the symmetry plane, and an orthographic projection of the fourth tab on the symmetry plane are spaced apart from one another.
2. 2 . The electrode assembly of claim 1 , wherein the first tab, the second tab, the third tab, and the fourth tab are arranged at a same side in the height direction of the electrode assembly.
3. 3 . The electrode assembly of claim 1 , wherein two of the first tab, the second tab, the third tab, and the fourth tab are arranged at one side of the electrode assembly in the height direction of the electrode assembly, and the other two of the first tab, the second tab, the third tab, and the fourth tab are arranged at the other side in the height direction of the electrode assembly.
4. 4 . The electrode assembly of claim 2 , wherein: the electrode assembly has a wound structure; the first tab and the fourth tab are arranged at one side of the symmetry plane of the electrode assembly, and the second tab and the third tab are arranged at the other side of the symmetry plane; and the first tab is disposed between the second tab and the third tab in the length direction of the electrode assembly.
5. 5 . The electrode assembly of claim 3 , wherein; the electrode assembly has a wound structure; the first tab and the fourth tab are arranged at one side of the symmetry plane of the electrode assembly, and the second tab and the third tab are arranged at the other side of the symmetry plane; and the first tab is disposed between the second tab and the third tab in the length direction of the electrode assembly.
6. 6 . The electrode assembly of claim 2 , wherein: the electrode assembly has a wound structure; the second tab and the third tab are arranged at one side of the symmetry plane of the electrode assembly, and the first tab and the fourth tab are arranged at the other side of the symmetry plane; and the fourth tab is disposed between the second tab and the third tab in the length direction of the electrode assembly.
7. 7 . The electrode assembly of claim 3 , wherein: the electrode assembly has a wound structure; the second tab and the third tab are arranged at one side of the symmetry plane of the electrode assembly, and the first tab and the fourth tab are arranged at the other side of the symmetry plane; and the fourth tab is disposed between the second tab and the third tab in the length direction of the electrode assembly.
8. 8 . The electrode assembly of claim 2 , wherein: the electrode assembly has a wound structure; the first tab and the second tab are arranged at one side of the symmetry plane of the electrode assembly, and the third tab and the fourth tab are arranged at the other side of the symmetry plane; and the third tab is disposed between the first tab and the second tab in the length direction of the electrode assembly.
9. 9 . The electrode assembly of claim 3 , wherein: the electrode assembly has a wound structure; the first tab and the second tab are arranged at one side of the symmetry plane of the electrode assembly, and the third tab and the fourth tab are arranged at the other side of the symmetry plane; and the third tab is disposed between the first tab and the second tab in the length direction of the electrode assembly.
10. 10 . The electrode assembly of claim 2 , wherein: the electrode assembly has a wound structure; the first tab and the second tab are arranged at one side of the symmetry plane of the electrode assembly, and the third tab and the fourth tab are arranged at the other side of the symmetry plane; and the first tab is disposed between the third tab and the second tab in the length direction of the electrode assembly.
11. 11 . The electrode assembly of claim 3 , wherein; the electrode assembly has a wound structure; the first tab and the second tab are arranged at one side of the symmetry plane of the electrode assembly, and the third tab and the fourth tab are arranged at the other side of the symmetry plane; and the first tab is disposed between the third tab and the second tab in the length direction of the electrode assembly.
12. 12 . The electrode assembly of claim 2 , wherein: the electrode assembly has a wound structure; and the first tab, the second tab, the third lab, and the fourth lab are arranged at a same side of the symmetry plane of the electrode assembly.
13. 13 . The electrode assembly of claim 3 , wherein: the electrode assembly has a wound structure; and the first tab, the second tab, the third lab, and the fourth lab are arranged at a same side of the symmetry plane of the electrode assembly.
14. 14 . The electrode assembly of claim 1 , wherein: the first active material layer is different from the second active material layer; and/or the third active material layer is different from the fourth active material layer.
15. 15 . A battery pack, comprising a battery box and a plurality of electrode assemblies received in the battery box, each of the plurality of electrode assemblies comprising a positive electrode and a negative electrode, wherein: the positive electrode comprises a first insulating layer, a first conductive layer on one surface of the first insulating layer and a second conductive layer on the other surface of the first insulating layer, a first active material layer on a surface of the first conductive layer, and a second active material layer on a surface of the second conductive layer; the negative electrode comprises a second insulating layer, a third conductive layer on one surface of the second insulating layer and a fourth conductive layer on the other surface of the second insulating layer, a third active material layer on a surface of the third conductive layer, and a fourth active material layer on a surface of the fourth conductive layer; the positive electrode and the negative electrode which are adjacent to each other are separated by a separator; a current in the first conductive layer of the positive electrode is outputted through a first tab, and a current in the second conductive layer of the positive electrode is outputted through a second tab; a current in the third conductive layer of the negative electrode is outputted through a third tab, and a current in the fourth conductive layer of the negative electrode is outputted through a fourth tab; the first tab and the second tab are staggered, wherein a part of the first conductive layer and a part of the first insulating layer extend beyond the second conductive layer to form the first tab in a height direction of the electrode assembly, and a part of the second conductive layer and a part of the first insulating layer extend beyond the first conductive layer to form the second tab in the height direction of the electrode assembly; the third tab and the fourth tab are staggered, wherein a part of the third conductive layer and a part of the second insulating layer extend beyond the fourth conductive layer to form the third tab in the height direction of the electrode assembly, and a part of the fourth conductive layer and a part of the second insulating layer extend beyond the third conductive layer to form the fourth tab in the height direction of the electrode assembly; and the electrode assembly has a symmetry plane that is parallel to the height direction and a length direction of the electrode assembly, an orthographic projection of the first tab on the symmetry plane, an orthographic projection of the second tab on the symmetry plane, an orthographic projection of the third tab on the symmetry plane, and an orthographic projection of the fourth tab on the symmetry plane are spaced apart from one another.
16. 16 . The battery pack of claim 15 , wherein the first tab, the second tab, the third tab, and the fourth tab are arranged at a same side in the height direction of the electrode assembly.
17. 17 . The battery pack of claim 15 , wherein two of the first tab, the second tab, the third tab, and the fourth tab are arranged at one side of the electrode assembly in the height direction of the electrode assembly, and the other two of the first tab, the second tab, the third tab, and the fourth tab are arranged at the other side in the height direction of the electrode assembly.
18. 18 . A vehicle, comprising a processor and a battery pack electrically coupled with the processor, the battery pack comprising a battery box and a plurality of electrode assemblies received in the battery box, the processor being configured to control charging and discharging of each of the plurality of electrode assemblies, and each of the plurality of electrode assemblies comprising a positive electrode and a negative electrode, wherein: the positive electrode comprises a first insulating layer, a first conductive layer on one surface of the first insulating layer and a second conductive layer on the other surface of the first insulating layer, a first active material layer on a surface of the first conductive layer, and a second active material layer on a surface of the second conductive layer; the negative electrode comprises a second insulating layer, a third conductive layer on one surface of the second insulating layer and a fourth conductive layer on the other surface of the second insulating layer, a third active material layer on a surface of the third conductive layer, and a fourth active material layer on a surface of the fourth conductive layer; the positive electrode and the negative electrode which are adjacent to each other are separated by a separator; a current in the first conductive layer of the positive electrode is outputted through a first tab, and a current in the second conductive layer of the positive electrode is outputted through a second tab; a current in the third conductive layer of the negative electrode is outputted through a third tab, and a current in the fourth conductive layer of the negative electrode is outputted through a fourth tab; the first tab and the second tab are staggered, wherein a part of the first conductive layer and a part of the first insulating layer extend beyond the second conductive layer to form the first tab in a height direction of the electrode assembly, and a part of the second conductive layer and a part of the first insulating layer extend beyond the first conductive layer to form the second tab in the height direction of the electrode assembly; the third tab and the fourth tab are staggered, wherein a part of the third conductive layer and a part of the second insulating layer extend beyond the fourth conductive layer to form the third tab in the height direction of the electrode assembly, and a part of the fourth conductive layer and a part of the second insulating layer extend beyond the third conductive layer to form the fourth tab in the height direction of the electrode assembly; and the electrode assembly has a symmetry plane that is parallel to the height direction and a length direction of the electrode assembly, an orthographic projection of the first tab on the symmetry plane, an orthographic projection of the second tab on the symmetry plane, an orthographic projection of the third tab on the symmetry plane, and an orthographic projection of the fourth tab on the symmetry plane are spaced apart from one another.
19. 19 . The electrode assembly of claim 1 , wherein any two of the first tab, the second tab, the third tab, and the fourth tab are located on one side of the symmetry plane, and the remaining two of the first tab, the second tab, the third tab, and the fourth tab are located on the other side of the symmetry plane.
20. 20 . The electrode assembly of claim 1 , wherein all of the first tab, the second tab, the third tab, and the fourth tab are located on a same side of the symmetry plane.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application claims priority under 35 U.S.C. § 119(a) to and the benefit of Chinese Patent Application Serial No. 202122457763.7, filed Oct. 12, 2021, and Chinese Patent Application Serial No. 202111188964.X, filed Oct. 12, 2021, the entire disclosures of which are hereby incorporated by reference. TECHNICAL FIELD This application relates to the technical field of batteries, and in particular, to an electrode assembly. BACKGROUND At present, common lithium batteries generally use aluminum foil and copper foil as positive and negative electrodes, and battery performance of this type of lithium battery is more prone to defects. SUMMARY In a first aspect, an electrode assembly is provided in the implementations of the disclosure. The electrode assembly includes a positive electrode and a negative electrode. The positive electrode includes a first insulating layer, a first conductive layer on one surface of the first insulating layer and a second conductive layer on the other surface of the first insulating layer, a first active material layer on a surface of the first conductive layer, and a second active material layer on a surface of the second conductive layer. The negative electrode includes a second insulating layer, a third conductive layer on one surface of the second insulating layer and a fourth conductive layer on the other surface of the second insulating layer, a third active material layer on a surface of the third conductive layer, and a fourth active material layer on a surface of the fourth conductive layer. The positive electrode and the negative electrode which are adjacent to each other are separated by a separator. A current in the first conductive layer of the positive electrode is outputted through a first tab. A current in the second conductive layer of the positive electrode is outputted through a second tab. A current in the third conductive layer of the negative electrode is outputted through a third tab. A current in the fourth conductive layer of the negative electrode is outputted through a fourth tab. In a second aspect, a battery pack is provided. The battery pack includes a battery box and multiple electrode assemblies provided in the first aspect, where the multiple electrode assemblies are received in the battery box. In a third aspect, a vehicle is provided. The vehicle includes a processor and a battery pack provided in the second aspect. The battery pack is electrically coupled with the processor. The processor is configured to control charging and discharging of each of the multiple electrode assemblies. BRIEF DESCRIPTION OF THE DRAWINGS In order to describe technical solutions of implementations of the disclosure more clearly, the following will give a brief introduction to the accompanying drawings used for describing the implementations. It should be appreciated that the accompanying drawings hereinafter described are merely some implementations of the disclosure and should not be deemed limitations on the scope. Based on these drawings, those of ordinary skill in the art can also obtain other drawings without creative effort. FIG. 1 is a cross-sectional view of an electrode assembly according to implementations of the disclosure. FIG. 2 illustrates an arrangement of tabs of an electrode assembly according to an implementation of the disclosure. FIG. 3 illustrates an arrangement of tabs of an electrode assembly according to another implementation of the disclosure. FIG. 4 illustrates an arrangement of tabs of an electrode assembly according to another implementation of the disclosure. FIG. 5 illustrates an arrangement of tabs of an electrode assembly according to another implementation of the disclosure. FIG. 6 illustrates an arrangement of tabs of an electrode assembly according to another implementation of the disclosure. FIG. 7 illustrates an arrangement of tabs of an electrode assembly according to another implementation of the disclosure. FIG. 8 illustrates an arrangement of tabs of an electrode assembly according to another implementation of the disclosure. FIG. 9 is a cross-sectional view of an electrode assembly according to another implementation of the disclosure. FIG. 10 illustrates an arrangement of tabs of an electrode assembly according to another implementation of the disclosure. FIG. 11 illustrates an arrangement of tabs of an electrode assembly according to another implementation of the disclosure. FIG. 12 illustrates a battery pack according to implementations of the disclosure. FIG. 13 illustrates a vehicle according to implementations of the disclosure. REFERENCE SIGNS 10: electrode assembly; 11: positive electrode; 111: first insulating layer; 112: first conductive layer; 113: second conductive layer; 114: first active material layer; 115: second active material layer; 12: negative electrode; 121: second insulating layer; 122: third conductive layer; 123: fourth conductive layer; 124: third active materi