Battery pack

Patent metadata

Field	Value
Publication number	US-8986875-B2
Application number	US-88197410-A
Country	US
Kind code	B2
Filing date	Sep 14, 2010
Priority date	Nov 17, 2009
Publication date	Mar 24, 2015
Grant date	Mar 24, 2015

Abstract

Provided is a battery pack formed by coupling a cover case and a bare cell. The battery pack includes: a bare cell including a cap plate having a surface in which at least one screw receiving groove is formed; a cover case disposed at a side of the cap plate, and having a surface in which at least one mounting groove is formed and a hole penetrating a center of the mounting groove; and at least one tapping screw including a head part and a body part that are mounted in the mounting groove of the cover case, wherein the body part penetrates the hole and is coupled to the screw receiving groove of the cap plate; wherein the cap plate includes a protruding unit formed in the second surface of the cap plate in correspondence to the screw receiving groove of the cap plate.

First claim

What is claimed is:

1. A battery pack, comprising:
a bare cell comprising a cap plate having a first surface having at least one screw receiving groove, the cap plate comprising a protruding unit formed on a second surface of the cap plate in correspondence to the position of the screw receiving groove of the cap plate;
a cover case disposed at a side of the cap plate and comprising a surface with at least one mounting groove and a hole at approximately the center of the mounting groove; and
at least one tapping screw comprising a head part and a body part, the head part is mounted in the mounting groove of the cover case and the body part penetrates the hole and is coupled to the screw receiving groove of the cap plate, when the tapping screw fixes the cover case to the cap plate, and the screw receiving groove of the cap plate has a depth so as to have a space between a lower end surface of the body part of the tapping screw and a bottom surface of the screw receiving groove of the cap plate and the lower end surface of the first tapping screw is coupled not to exceed the thickness of the cap plate, and
an inner circumferential surface of the screw receiving groove comprising a projection such that an inscribed circle that is tangent to both of the inner circumferential surface and the projection being greater than the inside diameter of the body part of the tapping screw and being less than the outside diameter of the body part of the tapping screw.

2. The battery pack of claim 1 , further comprising a tap disposed between the cap plate and the cover case and having a coupling hole in correspondence to the screw receiving groove, the body part of the tapping screw penetrating the coupling hole of the tap, and a protection circuit substrate being electrically connected to the bare cell through the connection between the tapping screw and the screw receiving groove.

3. The battery pack of claim 2 , a cross-sectional dimension of the coupling hole of the tap being greater than an inside diameter of the body part of the tapping screw and less than an outside diameter of the body part of the tapping screw.

4. The battery pack of claim 1 , a connection part between the protruding unit of the cap plate and the second surface of the cap plate being a curved surface.

5. The battery pack of claim 1 , a connection part between the protruding unit of the cap plate and the second surface of the cap plate being an inclined surface.

6. The battery pack of claim 1 , an inner diameter of the screw receiving groove of the cap plate being greater than an inside diameter of the body part and less than an outside diameter of the body part.

7. The battery pack of claim 1 , the inner circumferential surface of the screw receiving groove being deformable.

8. The battery pack of claim 1 , at least a part of scraps of the screw receiving groove being accommodated in the space.

9. The battery pack of claim 1 , the projection being deformable.

10. The battery pack of claim 1 , at least a part of scraps of the projection being accommodated in the space.

11. The battery pack of claim 1 , when the tapping screw fixes the cover case to the cap plate, a length of the body part of the tapping screw and a thickness of the cap plate may each have a predetermined value such that a lower end surface of the body part reaches or does not reach a horizontal plane of the second surface of the cap plate.

12. The battery pack of claim 1 , the thickness of the cap plate being in a range from about 0.8 mm to about 1 mm.

13. The battery pack of claim 11 , the thickness of the cap plate being in a range from about 0.8 mm to about 1 mm.

Assignees

• Baek Woon-Seong
• Lee Sang-Joo
• Yoon Heui-Sang
• Kim Jong-Pil
• Samsung Sdi Co Ltd

Inventors

• Baek Woon-Seong
• Lee Sang-Joo
• Yoon Heui-Sang
• Kim Jong-Pil

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/15

  for prismatic or rectangular cells (H01M50/153 takes precedence) · CPC title

• H01M50/169 Primary

  by welding, brazing or soldering · CPC title

• H01M50/103

  prismatic or rectangular (H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/209

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title