Secondary battery

Patent metadata

Field	Value
Publication number	US-2019280280-A1
Application number	US-201916420197-A
Country	US
Kind code	A1
Filing date	May 23, 2019
Priority date	Nov 23, 2016
Publication date	Sep 12, 2019
Grant date	—

Abstract

A secondary battery is provided, comprising a first adapter piece and an electrode assembly, comprising a first and second electrode plates, a plurality of first electrode tabs, a second electrode tab, a direction parallel to the first electrode plate being L, two end points in a thickness direction being T1 and T3, a position of one of the first electrode tabs farthest from T1 or T3 is T2; all the first electrode tabs are stacked to form a first multi-tab structure and connected to the first adapter piece, it further comprises a first adapter member comprising the first multi-tab structure and the first adapter piece; in the L direction, there is at most one layer of the first adapter member. The present application may reduce the existing waste of the top space caused by bending electrode tabs, and is more stable for the bending effect, improving the ED of battery.

First claim

What is claimed is:

1 . A secondary battery, comprising a first adapter piece and an electrode assembly, the electrode assembly comprising a first electrode plate, a second electrode plate, a plurality of first electrode tabs, and a second electrode tab, a direction parallel to the first electrode plate being L, two end points in a thickness direction of the electrode assembly being T 1 and T 3 respectively,
wherein a position of one of the first electrode tabs farthest from T 1 or T 3 is T 2 ; all the first electrode tabs are stacked to form a first multi-tab structure and connected to the first adapter piece, and the electrode assembly further comprises a first adapter member comprising the first multi-tab structure and the first adapter piece; in the L direction, there is at most one layer of the first adapter member.

2 . The secondary battery according to claim 1 , wherein all of the first electrode tabs are located between T 1 and T 2 in the thickness direction of the electrode assembly.

3 . The secondary battery according to claim 2 , wherein there is at most one layer of the first adapter member in the L direction.

4 . The secondary battery according to claim 1 , wherein the first multi-tab structure is formed by all of the first electrode tabs bent away from a center of the electrode assembly.

5 . The secondary battery according to claim 4 , wherein the first adapter piece is connected to the first multi-tab structure that is bent toward the center of the electrode assembly.

6 . The secondary battery according to claim 1 , wherein the first multi-tab structure is formed by all of the first electrode tabs bent toward a center of the electrode assembly.

7 . The secondary battery according to claim 6 , wherein the first adapter piece is connected to the first multi-tab structure that is bent away from the center of the electrode assembly.

8 . The secondary battery according to claim 7 , wherein all of the first electrode tabs are located between T 1 and T 2 in the thickness direction of the electrode assembly.

9 . The secondary battery according to claim 8 , wherein a bending point of the first multi-tab structure and all of the first electrode tabs are located between T 1 and T 2 in the thickness direction of the electrode assembly.

10 . The secondary battery according to claim 1 , the secondary battery comprises a second adapter piece, wherein the first adapter piece and the second adapter piece are relatively aligned.

11 . The secondary battery according to claim 10 , wherein all of the first electrode tabs are located between T 1 and T 2 in the thickness direction of the electrode assembly, a connection position of the first adapter piece and the first multi-tab structure is a first connection position.

12 . The secondary battery according to claim 11 , wherein the first connection position partially overlap with all of the first electrode tabs in the L direction.

13 . The secondary battery according to claim 11 , wherein the first connection position does not overlap with all of the first electrode tabs in the L direction.

14 . The secondary battery according to claim 1 , wherein the second electrode tab is disposed in a same manner as the first electrode tab.

15 . The secondary battery according to claim 13 , wherein the second adapter piece is disposed in a same manner as the first adapter piece.

16 . The secondary battery according to claim 1 , wherein the electrode assembly is a wound electrode assembly.

17 . The secondary battery according to claim 1 , wherein the electrode assembly is a laminated electrode assembly.

18 . The secondary battery according to claim 1 , wherein the electrode assembly is a wound hybrid laminated electrode assembly.

19 . The secondary battery according to claim 1 , wherein the first electrode plate is a positive electrode plate and the second electrode plate is a negative electrode plate.

20 . The secondary battery according to claim 1 , wherein the first electrode plate is a negative electrode plate and the second electrode plate is a positive electrode plate.

Assignees

• Dongguan Amperex Tech Ltd

Inventors

• Xiao Liangzhen
• Zeng Qiao

Classifications

• H01M10/04 Primary

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title

• H01M50/538

  Connection of several leads or tabs of wound or folded electrode stacks · CPC title

• H01M50/536

  characterised by the method of fixing the leads to the electrodes, e.g. by welding · CPC title

• H01M50/54

  Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges · CPC title

• H01M2/26 Primary

  Electricity · mapped topic