SECONDARY BATTERY

• US 20120034513A1
• Filed: 02/24/2011
• Published: 02/09/2012
• Est. Priority Date: 08/05/2010
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Kim, Daekyu
• Granted Patent: US 8,802,281 B2
• Time in Patent Office: Days
• US Class Current: 429/186
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/121 Organic material
• CPC Class Codes: H01M 50/129 with two or more layers of only organic material
• CPC Class Codes: H01M 50/528 Fixed electrical connections, i.e. not intended for disconnection
• CPC Class Codes: H01M 50/579 in response to shock
• 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

A secondary battery is disclosed. In one embodiment, the battery includes i) an electrode assembly and ii) first and second electrode tabs spaced apart from each other and extending from the electrode assembly, wherein the first and second electrode tabs have first and second outer surfaces, respectively. The battery may further include i) an electrolyte, ii) a movement prevention tape attached to at least a portion of at least one of the first and second outer surfaces, wherein at least part of the movement prevention tape is configured to become adhesive upon contacting the electrolyte and iii) a can accommodating the electrode assembly, electrode tabs and movement prevention tape.

Claims

1. A secondary battery, comprising:

an electrode assembly;

first and second electrode tabs spaced apart from each other and extending from the electrode assembly, wherein the first and second electrode tabs have first and second outer surfaces, respectively;

an electrolyte;

a movement prevention tape attached to at least a portion of at least one of the first and second outer surfaces, wherein at least part of the movement prevention tape is configured to become adhesive upon contacting the electrolyte; and

a can accommodating the electrode assembly, electrode tabs and movement prevention tape.

2. The secondary battery of claim 1, wherein the movement prevention tape comprises i) an adhesive layer at least partially surrounding at least one of the first and second outer surfaces and ii) a base layer formed on the adhesive layer, and wherein at least part of the base layer is configured to become adhesive upon contacting the electrolyte.

3. The secondary battery of claim 2, wherein an adhesive portion of the base layer has a tensile strength of at least about 0.1 kgf/cm².

4. The secondary battery of claim 2, wherein the base layer is formed of a polymer film.

5. The secondary battery of claim 4, wherein the electrolyte contains a carbonate-based solvent, and wherein the carbonate-based solvent is configured to melt at least a portion of the polymer film.

6. The secondary battery of claim 4, wherein the polymer film is configured to at least partially shrink and at least partially expand.

7. The secondary battery of claim 4, wherein the polymer film is formed of at least one of the following:

polystyrene (PS), polyamide, polyacrylonitrile, polycarbonate, polyethylene acetate and oriented polystyrene.

8. The secondary battery of claim 2, wherein the base layer has a thickness of about 10 μ

m to about 50 μ

m.

9. The secondary battery of claim 2, wherein the adhesive layer is formed of at least one of the following:

PMMA (poly methyl methacrylate), PEMA (poly ethyl methacrylate) and PBMA (poly butyl methacrylate).

10. The secondary battery of claim 2, wherein the adhesive layer has a thickness of about 1 μ

m to about 30 μ

m.

11. The secondary battery of claim 2, wherein the first and second electrode tabs have first and second lengths, respectively, and wherein the base layer is formed between i) a portion of about ⅔

of the length of at least one of the first and second electrode tabs and ii) the electrode assembly.

12. The secondary battery of claim 11, wherein the movement prevention tape substantially completely surrounds at least one of the first and second electrode tabs.

13. The secondary battery of claim 1, further comprising:

a cap assembly configured to substantially close the can;

a sub-plate accommodated in the can and attached to the cap assembly; and

an insulator formed on a surface of the electrode assembly,

wherein an adhesive portion of the movement prevention tape contacts at least one of the sub-plate and insulator.

14. The secondary battery of claim 1, further comprising an insulation tape formed between i) at least one of the first and second outer surfaces and ii) the movement prevention tape.

15. The secondary battery of claim 1, wherein the first and second electrode tabs are attached to opposite sides of the electrode assembly.

16. The secondary battery of claim 1, wherein the first and second electrode tabs are attached to the same side of the electrode assembly.

17. The secondary battery of claim 16, wherein the movement prevention tape is attached to the first and second outer surfaces.

18. A secondary battery, comprising:

an electrode assembly;

first and second electrode tabs spaced apart from each other and extending from the electrode assembly, wherein the first and second electrode tabs have first and second outer surfaces, respectively;

a movement prevention tape attached to at least a portion of at least one of the first and second outer surfaces;

a can accommodating the electrode assembly, electrode tabs and movement prevention tape; and

a cap assembly configured to substantially close the can,

wherein at least part of the movement prevention tape contacts at least the cap assembly.

19. The secondary battery of claim 18, wherein the at least part of the movement prevention tape contacts the electrode assembly.

20. The secondary battery of claim 18, wherein the movement prevention tape comprises i) an adhesive layer at least partially surrounding at least one of the first and second outer surfaces and ii) a base layer formed on the adhesive layer.

21. The secondary battery of claim 20, wherein the base layer has a tensile strength of at least about 0.1 kgf/cm².

22. The secondary battery of claim 18, further comprising:

a sub-plate accommodated in the can and attached to the cap assembly; and

an insulator formed on a surface of the electrode assembly,

wherein at least part of the base layer contacts at least one of the sub-plate and insulator.

23. The secondary battery of claim 18, wherein the base layer is formed of at least one of the following:

polystyrene (PS), polyamide, polyacrylonitrile, polycarbonate, polyethylene acetate and oriented polystyrene.