Battery pack

• US 8,592,062 B2
• Filed: 10/13/2009
• Issued: 11/26/2013
• Est. Priority Date: 10/13/2008
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Kim, Changseob
• Primary Examiner(s): Ruddock, Ula C
• Assistant Examiner(s): Chmielecki, Scott J
• Application Number:
  US12/588,341
• Publication Number:
  US 20100092861A1
• Time in Patent Office: 1,505 Days
• Field of Search: 429/7, 429/163, 429/178
• US Class Current: 429/7
• CPC Class Codes: H01M 50/103 prismatic or rectangular H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/572 Means for preventing undesired use or discharge
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery pack including a bare cell, a metal case covering the outer surface of the bare cell, and a protection circuit board electrically connected to the metal case.

Claims

1. A battery pack, comprising:

a bare cell having an outer surface, another surface, and a positive electrode tab and a negative electrode tab, the positive electrode tab and negative electrode tab protruding from the other surface of the bare cell;

a metal case covering the outer surface of the bare cell; and

a protection circuit board electrically connected to the metal case,

wherein the protection circuit board includes at least one of;

an antenna pad electrically connected to the metal case, and

a ground electrically connected to the metal case, the ground being electrically connected to one of the positive electrode tab and the negative electrode tab of the bare cell and being grounded, and

wherein the metal case is directly electrically connected to the protection circuit board.

2. The battery pack as claimed in claim 1, wherein:

the protection circuit board is disposed on the other surface of the bare cell, from which other surface the positive electrode tab and the negative electrode tab of the bare cell protrude;

wherein the protection circuit board includes a positive electrode pad and a negative electrode pad to which the positive electrode tab and the negative electrode tab of the bare cell are connected, and wherein the protection circuit board includes the antenna pad electrically connected to the metal case.

3. The battery pack as claimed in claim 2, wherein the metal case includes a connection terminal and the metal case is directly electrically connected to the antenna pad of the protection circuit board through the connection terminal.

4. The battery pack as claimed in claim 3, wherein the metal case includes a first metal case and a second metal case and the connection terminal is disposed on at least one of the first metal case and the second metal case.

5. The battery pack as claimed in claim 2, wherein the metal case includes a ground terminal electrically connected to one of the positive electrode tab and the negative electrode tab of the bare cell and which is grounded.

6. The battery pack as claimed in claim 5, wherein the metal case includes a first metal case and a second metal case and the ground terminal is disposed on at least one of the first metal case and the second metal case.

7. The battery pack as claimed in claim 5, wherein the ground terminal is electrically connected to the negative electrode tab.

8. The battery pack as claimed in claim 1, wherein:

the bare cell includes first and second wide surfaces and right and left narrow surfaces, and

the metal case includes a first metal case covering the first wide surface and the right and left narrow surfaces of the bare cell and a second metal case covering the second wide surface and the right and left narrow surfaces of the bare cell.

9. The battery pack as claimed in claim 8, wherein the first metal case and the second metal case each include opposite sides and the opposite sides of the first metal case and the second metal case are each bent to form extensions, and the first and second metal cases are coupled to each other by coupling the extensions.

10. The battery pack as claimed in claim 1, wherein the metal case includes at least one of steel and stainless steel.

11. The battery pack as claimed in claim 1, wherein the metal case includes stainless steel (SUS).

12. The battery pack as claimed in claim 1, wherein the bare cell has a periphery, side surfaces, a bottom surface and a frame disposed at the periphery of the bare cell and covering the side surfaces and bottom surface of the bare cell.

13. The battery pack as claimed in claim 12, wherein:

the bare cell includes a top surface and an electrode tab protruding from the top surface, and

the frame includes an upper frame disposed on the top surface of the bare cell and a lower frame covering the side surfaces and bottom surface of the bare cell.

14. The battery pack as claimed in claim 13, wherein the upper frame includes a through hole, the protection circuit board includes an external terminal and the external terminal protrudes through the through hole.

15. The battery pack as claimed in claim 1, wherein the bare cell is a pouch type secondary battery.

16. The battery pack as claimed in claim 1, wherein:

the protection circuit board is disposed on the other surface of the bare cell, from which other surface the positive electrode tab and the negative electrode tab of the bare cell protrude;

wherein the protection circuit board includes a positive electrode pad and a negative electrode pad to which the positive electrode tab and the negative electrode tab of the bare cell are connected.

17. The battery pack as claimed in claim 16, wherein:

the metal case includes a ground terminal electrically connected to one of the positive electrode tab and the negative electrode tab of the bare cell and which is grounded, and

the metal case is directly electrically connected to the protection circuit board through the ground terminal.

18. The battery pack as claimed in claim 17, wherein the metal case includes a first metal case and a second metal case and the ground terminal is disposed on at least one of the first metal case and the second metal case.