Cell structure for secondary battery and secondary battery having the cell structure

Patent metadata

Field	Value
Publication number	US-2016329546-A1
Application number	US-201514922682-A
Country	US
Kind code	A1
Filing date	Oct 26, 2015
Priority date	May 6, 2015
Publication date	Nov 10, 2016
Grant date	—

Abstract

A cell structure for a secondary battery includes an electrode assembly including a plurality of electrodes, a plurality of electrode tabs extending from the electrodes to an outside of the electrode assembly, and a plurality of lead tabs electrically connected to the electrode tabs and contacting the electrode assembly. In the cell structure, a part of each of the lead tabs is folded, and the electrode tabs are inserted into the folded part of each of the lead tabs.

First claim

What is claimed is:

1 . A cell structure for a secondary battery, the cell structure comprising:
an electrode assembly comprising a plurality of electrodes; a plurality of electrode tabs extending from the electrodes to an outside of the electrode assembly; and a plurality of lead tabs electrically connected to the electrode tabs and contacting the electrode assembly.

2 . The cell structure for a secondary battery of claim 1 , further comprising:
a fixing unit which fixes the lead tabs to a contact surface of the electrode assembly contacting the lead tabs.

3 . The cell structure for a secondary battery of claim 1 , wherein
a part of each of the lead tabs is folded, and the electrode tabs are inserted into the folded part of each of the lead tabs.

4 . The cell structure for a secondary battery of claim 1 , wherein each of the electrode tabs is folded at least once.

5 . The cell structure for a secondary battery of claim 1 , wherein the electrode assembly comprises a flexible material.

6 . The cell structure for a secondary battery of claim 1 , further comprising:
an insulation layer disposed on a contact surface of the electrode assembly contacting the lead tabs.

7 . The cell structure for a secondary battery of claim 1 , wherein
each of the electrode tabs has a width less than about 50% of a width of the electrode assembly, and each of the lead tabs has a width equal to or less than about 25% of the width of the electrode assembly.

8 . The cell structure for a secondary battery of claim 1 , wherein
the electrodes comprise a first electrode and a second electrode, which are alternately stacked one on another, and the electrode assembly further comprises a separation film disposed between the first electrode and the second electrode.

9 . The cell structure for a secondary battery of claim 8 , wherein
the electrode tabs comprise:
a first electrode tab extending from the first electrode; and
a second electrode tab extending from the second electrode, and
the lead tabs comprise:
a first lead tab electrically connected to the first electrode tab; and
a second lead tab electrically connected to the second electrode tab.

10 . The cell structure for a secondary battery of claim 9 , wherein the first lead tab and the second lead tab are in contact with a same surface of the electrode assembly.

11 . The cell structure for a secondary battery of claim 9 , wherein the first lead tab and the second lead tab are in contact with different surfaces of the electrode assembly, respectively.

12 . The cell structure for a secondary battery of claim 8 , wherein at least one of the first electrode, the second electrode and the separation film is partially bound by a binding member.

13 . A cell structure for a secondary battery, the cell structure comprising:
an electrode assembly comprising a plurality of electrodes; a plurality of electrode tabs extending from the electrodes to an outside of the electrode assembly; and a plurality of lead tabs electrically connected to the electrode tabs, wherein a part of each of the lead tabs is folded, and the electrode tabs are inserted into the folded part of each of the lead tabs.

14 . The cell structure for a secondary battery of claim 13 , wherein the lead tabs are in contact with the electrode assembly.

15 . The cell structure for a secondary battery of claim 13 , further comprising:
a fixing unit which fixes the lead tabs to a contact surface of the electrode assembly contacting the lead tabs.

16 . The cell structure for a secondary battery of claim 13 , wherein each of the electrode tabs is folded at least once.

17 . A secondary battery comprising:
an exterior member; and a cell structure disposed in the exterior member, wherein the cell structure comprises:
an electrode assembly comprising a plurality of electrodes;
a plurality of electrode tabs extending from the electrodes to an outside of the electrode assembly; and
a plurality of lead tabs electrically connected to the electrode tabs and contacting the electrode assembly.

18 . The secondary battery of claim 17 , further comprising:
a fixing unit which fixes the lead tabs to a contact surface of the electrode assembly contacting the lead tabs.

19 . The secondary battery of claim 17 , wherein
a part of each of the lead tabs is folded, and the electrode tabs are inserted into the folded part of each of the lead tabs.

20 . The secondary battery of claim 17 , wherein each of the electrode tabs is folded at least once.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Ham Dongjin
• Hwang Seungsik
• Choi Jaeman
• Kwon Moonseok
• Song Minsang

Classifications

• H01M10/0436 Primary

  Small-sized flat cells or batteries for portable equipment · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M10/04

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

• H01M10/0431

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title