Electrode member, electrode assembly and rechargeable battery

• US 10,644,322 B2
• Filed: 06/14/2018
• Issued: 05/05/2020
• Est. Priority Date: 11/22/2017
• Status: Active Grant

• Current Assignee: Contemporary Amperex Technology Co., Ltd.
• Original Assignee: Contemporary Amperex Technology Co., Ltd.
• Inventors: Xing, Chengyou, Li, Xiang, Zhu, Taosheng, Wang, Peng, Zheng, Yulian
• Primary Examiner(s): Marks, Jacob B
• Application Number:
  US16/008,286
• Publication Number:
  US 20190157684A1
• Time in Patent Office: 691 Days
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 4/13 Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
• CPC Class Codes: H01M 4/667 in the form of layers, e.g. coatings
• CPC Class Codes: H01M 4/70 characterised by shape or form
• CPC Class Codes: H01M 50/534 characterised by the material of the leads or tabs
• CPC Class Codes: H01M 50/536 characterised by the method of fixing the leads to the electrodes, e.g. by welding
• CPC Class Codes: H01M 50/54 Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

The present disclosure relates to the technical field of rechargeable battery and, particularly, relates to an electrode member, an electrode assembly and a rechargeable battery. The electrode member includes an electrode body and a conduction structure, the electrode body comprises an insulation substrate and an conduction layer placed on a surface of the insulation substrate, the conduction layer includes a first portion and a second portion extending from the first portion, the first portion is coated with an active material while the second portion is not coated with the active material, and the conduction structure is connected to the second portion. After the electrode assembly is formed by winding or stacking of the electrode members, adjacent current guide portions are electrically connected to one another by the conduction structure, without being limited by the insulation substrate, so that the conductivity of the electrode member is effectively improved.

Claims

1. An electrode assembly, comprising a plurality of electrode members,

each of the plurality of electrode members comprising:

an electrode body, wherein the electrode body comprises an insulation substrate and a conduction layer provided on each of two opposite side surfaces of the insulation substrate, wherein the conduction layer comprises a first portion and a second portion extending from the first portion, wherein the first portion is coated with an active material and the second portion is not coated with the active material; and

a conduction structure, wherein the conduction structure is connected to the second portion, and the conduction structure comprises a first conduction element and a second conduction element,

wherein the first conduction element is connected to the second portion located on one of the two opposite side surfaces of the insulation substrate, the second conduction element is connected to the second portion located on the other one of the two opposite side surfaces of the insulation substrate, and the conduction structure and the second portion are welded to each other,

a portion of the insulation substrate corresponding to the second portion and the second portion form one current guide portion, a plurality of current guide portions of the plurality of electrode members is stacked, and the first conduction element and the second conduction element are arranged between every two adjacent guide portions of the plurality of current guide portions.

2. The electrode assembly according to claim 1, wherein the first conduction element is directly connected to the second conduction element;

or the conduction structure further comprises a conductive connection portion and the conductive connection portion is connected between the first conduction element and the second conduction element.

3. The electrode assembly according to claim 1, wherein an end of the conduction structure away from the first portion extends beyond an end of the second portion away from the first portion.

4. The electrode assembly according to claim 1, wherein a width of the second portion is greater than a width of the conduction structure.

5. The electrode assembly according to claim 1, wherein the conduction structure and the second portion that are welded to each other form a first welding portion there between, wherein the first welding portion is located at an end of the second portion close to the first portion.

6. The electrode assembly according to claim 1, wherein the second portion comprises a body portion and a transition portion, wherein the transition portion is located between the body portion and the first portion, and a width of the transition portion is greater than a width of the body portion.

7. The electrode assembly according to claim 6, wherein the conduction structure comprises a body connection portion and a transition connection portion, wherein the transition connection portion is located at an end of the body connection portion close to the first portion, and a width of the transition connection portion is greater than a width of the body connection portion.

8. The electrode assembly according to claim 7, wherein the body connection portion is connected to the body portion, and/or the transition connection portion is connected to the transition portion.

9. A rechargeable battery, comprising:

a current collection member, and

the electrode assembly according to claim 1, wherein the electrode member of the electrode assembly is electrically connected to the current collection member by the conduction structure.