SECONDARY BATTERY

• US 20130029188A1
• Filed: 01/06/2012
• Published: 01/31/2013
• Est. Priority Date: 07/25/2011
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH, Samsung SDI Company Limited
• Original Assignee: Robert Bosch GmbH, Samsung SDI Company Limited
• Inventors: KIM, Dukjung, Kim, In
• Granted Patent: US 9,472,802 B2
• Time in Patent Office: Days
• US Class Current: 429/53
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• CPC Class Codes: H01M 50/103 prismatic or rectangular H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/147 Lids or covers
• CPC Class Codes: H01M 50/176 for prismatic or rectangular cells H01M50/181 takes precedence
• CPC Class Codes: H01M 50/342 Non-re-sealable arrangements
• CPC Class Codes: H01M 50/417 Polyolefins
• CPC Class Codes: H01M 50/50 Current conducting connections for cells or batteries
• CPC Class Codes: H01M 50/571 Methods or arrangements for affording protection against corrosion; Selection of materials therefor
• 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 including an electrode assembly, the electrode assembly including an uncoated region at ends thereof; a case accommodating the electrode assembly; a cap plate coupled with the case; and an insulation member in the case, the insulation member including a first region between the electrode assembly and the cap plate, and a second region between the uncoated region of the electrode assembly and an inner surface of the case.

Claims

1. A secondary battery, comprising:

an electrode assembly, the electrode assembly including an uncoated region at ends thereof;

a case accommodating the electrode assembly;

a cap plate coupled with the case; and

an insulation member in the case, the insulation member including;

a first region between the electrode assembly and the cap plate, and

a second region between the uncoated region of the electrode assembly and an inner surface of the case.

2. The secondary battery as claimed in claim 1, wherein the insulation member is coupled with the cap plate.

3. The secondary battery as claimed in claim 2, wherein the first region includes:

a terminal protrusion in a cap plate terminal hole of the cap plate, the terminal protrusion including an insulation member terminal hole therethrough, and

a coupling protrusion, the coupling protrusion being coupled with a coupling recess of the cap plate.

4. The secondary battery as claimed in claim 3, wherein the first region further includes:

a vent hole under a vent plate of the cap plate,

an insulation member injection hole under a cap plate injection hole of the cap plate.

5. The secondary battery as claimed in claim 4, wherein the insulation member forms a gas passage that directs gas generated during charging/discharging of the secondary battery toward the vent hole.

6. The secondary battery as claimed in claim 3, wherein the first region includes a thick rim part extending downwardly along sides thereof.

7. The secondary battery as claimed in claim 1, wherein the second region extends downwardly from ends of the first region.

8. The secondary battery as claimed in claim 7, wherein the second region includes:

a second region back plate between the uncoated region of the electrode assembly and a narrow side of the case, and

a second region lateral plate extending inwardly from the second region back plate.

9. The secondary battery as claimed in claim 8, wherein the second region lateral plate extends between sides of the uncoated region of the electrode assembly and a wide side of the case.

10. The secondary battery as claimed in claim 8, wherein the second region includes a reinforcing member at a junction between the second region back plate and the second region lateral plate.

11. The secondary battery as claimed in claim 8, wherein the second region back plate has a width equal to or greater than a width of the uncoated region.

12. The secondary battery as claimed in claim 8, wherein the second region lateral plate extends to cover an entire wide side of the electrode assembly.

13. The secondary battery as claimed in claim 1, wherein the insulation member further includes a third region opposite to the first region, the third region being between a bottom side of the electrode assembly and the inner surface of the case.

14. The secondary battery as claimed in claim 13, wherein the third region extends inwardly from ends of the second region.

15. The secondary battery as claimed in claim 14, wherein the third region includes a third region bottom plate between the uncoated region of the electrode assembly and a bottom surface of the case.

16. The secondary battery as claimed in claim 15, wherein the third region bottom plate has a width equal to or greater than a width of the uncoated region of the electrode assembly.

17. The secondary battery as claimed in claim 15, wherein the third region bottom plate extends to cover an entire bottom side of the electrode assembly.

18. The secondary battery as claimed in claim 13, wherein the third region is foldable from one position longitudinal with the second region in an unassembled condition to another position normal to the second region in an assembled condition.

19. The secondary battery as claimed in claim 1, wherein the insulation member is formed from a phenol resin, polyphenylene sulfide, polyether ether ketone, polyether ketone, polyoxymethylene, or combinations thereof.

20. The secondary battery as claimed in claim 1, wherein the insulation member has a one-piece, integrally formed structure.