Curved electrode stack and battery cell including the same

Patent metadata

Field	Value
Publication number	US-2016268625-A1
Application number	US-201414892301-A
Country	US
Kind code	A1
Filing date	May 8, 2014
Priority date	Jul 31, 2013
Publication date	Sep 15, 2016
Grant date	—

Abstract

Disclosed herein are an electrode stack including at least one positive electrode, at least one negative electrode, and at least one separator, wherein the separator is laminated to one surface or opposite surfaces of at least one of the electrodes, the positive electrode, the negative electrode, and the separator are stacked such that the separator is disposed between the positive electrode and the negative electrode, and a stacked surface of each of the positive electrode, the negative electrode, and the separator includes a curved surface, and a battery cell including the same.

First claim

1 . An electrode stack comprising at least one positive electrode, at least one negative electrode, and at least one separator, wherein the separator is laminated to one surface or opposite surfaces of at least one of the electrodes, the positive electrode, the negative electrode, and the separator are stacked such that the separator is disposed between the positive electrode and the negative electrode, and a stacked surface of each of the positive electrode, the negative electrode, and the separator comprises a curved surface.

2 . The electrode stack according to claim 1 , wherein the electrode stack comprises at least one non-curved surface.

3 . The electrode stack according to claim 1 , wherein a side surface of the electrode stack that is not parallel to the stacked surface comprises one or more non-curved surfaces.

4 . The electrode stack according to claim 1 , wherein electrode terminals are formed at one or more non-curved surfaces.

5 . The electrode stack according to claim 4 , wherein both a positive electrode terminal and a negative electrode terminal are formed at one of the non-curved surfaces.

6 . The electrode stack according to claim 4 , wherein a positive electrode terminal is formed at one of the non-curved surfaces, and a negative electrode terminal is formed at the other of the non-curved surfaces.

7 . The electrode stack according to claim 1 , wherein the electrode stack comprises an electrode group comprising at least one positive electrode, at least one negative electrode, and at least one separator, the electrode group being configured to have a structure in which the positive electrode, the separator, and the negative electrode are laminated in a state in which the separator is disposed between the positive electrode and the negative electrode.

8 . The electrode stack according to claim 7 , wherein the electrode group is configured to have a structure in which outermost ones of the electrodes have the same polarity or different polarities.

9 . The electrode stack according to claim 8 , wherein at least one of the outermost electrodes is laminated to the separators in a state in which the at least one of the outermost electrodes is disposed between the separators.

10 . The electrode stack according to claim 1 , wherein the electrode stack comprises an electrode element comprising one selected from between a positive electrode and a negative electrode and at least one separator, the electrode element being configured to have a structure in which one selected from between the positive electrode and the negative electrode is laminated to the separator.

11 . The electrode stack according to claim 10 , wherein the electrode element is configured to have a structure in which one selected from between the positive electrode and the negative electrode is laminated to the separators in a state in which one selected from between the positive electrode and the negative electrode is disposed between the separators.

12 . The electrode stack according to claim 1 , wherein one end of each of the positive electrode, the negative electrode, and the separator does not intersect the other end of each of the positive electrode, the negative electrode, and the separator.

13 . The electrode stack according to claim 1 , wherein lamination surfaces are formed between the electrode and the separator constituting the electrode group or the electrode element, and the lamination surfaces are laminated to each other using a pressure-sensitive adhesive.

14 . The electrode stack according to claim 13 , wherein adhesion surfaces are formed between the electrode group and the electrode group, between the electrode group and the electrode element, or between the electrode element and the electrode element, and the adhesion surfaces are adhered to each other using the pressure-sensitive adhesive.

15 . The electrode stack according to claim 14 , wherein the same amount or different amounts of the pressure-sensitive adhesives are applied to the lamination surfaces and the adhesion surfaces.

16 . The electrode stack according to claim 15 , wherein the same amount of the pressure-sensitive adhesives are applied to the lamination surfaces and the adhesion surfaces.

17 . The electrode stack according to claim 14 , wherein the lamination surfaces have coupling force equal to or different from that of the adhesion surfaces.

18 . The electrode stack according to claim 17 , wherein the coupling force of the lamination surfaces is higher than that of the adhesion surfaces.

19 . The electrode stack according to claim 1 , further comprising a fixing member.

20 . A battery cell comprising an electrode stack according to claim 1 mounted in a battery case together with an electrolyte.

21 . The battery cell according to claim 20 , wherein the battery case is a metal can or a pouch-shaped battery case made of a laminate sheet comprising a metal layer and a resin layer.

22 . The battery cell according to claim 21 , wherein the battery cell is a lithium ion polymer battery, a lithium ion battery, or a lithium polymer battery.

23 . A battery pack comprising a battery cell according to claim 20 and a protection circuit module (PCM), wherein the protection circuit module is connected to electrode terminals of the battery cell.

24 . A device comprising a battery pack according to claim 23 .

25 . The device according to claim 24 , wherein the device is a smart phone, a mobile phone, a laptop computer, a tablet PC, a clock, a television, or glasses.

Assignees

• Lg Chemical Ltd

Inventors

• Choi Eun Seok
• Cho Shin Hyo
• Park Byung O
• Chung Jae Bin
• Kim Dong-Myung

Classifications

• H01M10/058 Primary

  Construction or manufacture · CPC title

• H01M2220/30

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

• H01M2004/025

  with shapes other than plane or cylindrical · CPC title

• H01M10/0436

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

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title