Rechargeable battery

• US 20090117412A1
• Filed: 06/16/2008
• Published: 05/07/2009
• Est. Priority Date: 11/07/2007
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Park, Kyungho, Kwak, Eunok, Koh, Seok, Byun, Jeongdeok
• Granted Patent: US 9,203,105 B2
• Time in Patent Office: Days
• US Class Current: 429/7
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H01M 2200/00 Safety devices for primary or secondary batteries
• CPC Class Codes: H01M 50/147 Lids or covers
• CPC Class Codes: H01M 50/15 for prismatic or rectangular cells H01M50/153 takes precedence
• CPC Class Codes: H01M 50/528 Fixed electrical connections, i.e. not intended for disconnection
• 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

In a rechargeable battery, a case is combined with an upper surface of a bare cell by being fixed to a lead plate electrically coupling a protection circuit board of a protection circuit module to the bare cell. Alternatively, the case is combined with the bare cell by being fixed to the protection circuit board so as not to be separated from the bare cell, thereby improving the reliability of the products.

Claims

1. A rechargeable battery, comprising:

a bare cell;

a protection circuit module including a protection circuit board installed in the bare cell;

a lead plate installed between the protection circuit board and the bare cell so as to electrically couple the protection circuit board and bare cell; and

a case connected to the bare cell so as to receive the protection circuit module on a surface of the bare cell;

wherein at least one projection is formed on the lead plate, and a projection fixing part combined with the projection is formed at the case so as to combine the case with the bare cell.

2. The rechargeable battery of claim 1, wherein the lead plate is installed on both ends of an upper surface of a cap plate of the bare cell and includes a substrate fixing part welded to the protection circuit board and a bare cell fixing part welded to the bare cell, and wherein the projection is formed horizontally and outwardly from a side surface of the bare cell fixing part.

3. The rechargeable battery of claim 2, wherein the lead plate is fixed by laser-welding the bare cell fixing part to the upper surface of the cap plate.

4. The rechargeable battery of claim 1, wherein the projection fixing part of the case is formed in a shape of a hole.

5. The rechargeable battery of claim 1, wherein the projection fixing part of the case is formed in a shape of a groove.

6. The rechargeable battery of claim 1, wherein the case comprises a sleeve covering an outer circumferential surface of an upper periphery of the bare cell and being extended at its lower end part, and the projection fixing part is formed on the sleeve.

7. The rechargeable battery of claim 6, wherein a label sheet is attached to a side surface of the bare cell so as to cover the sleeve of the case.

8. A rechargeable battery, comprising:

a bare cell;

a protection circuit module including a protection circuit board installed in the bare cell; and

an upper case connected to the bare cell while receiving the protection circuit module on one surface of the bare cell;

wherein at least one projection is formed on the protection circuit board, and a projection fixing part combined with the projection is formed at the case so as to combine the case with the bare cell.

9. The rechargeable battery of claim 8, wherein said at least one projection of the protection circuit board is projected horizontally and outwardly from a side surface of the protection circuit board.

10. The rechargeable battery of claim 8, wherein the projection fixing part is formed in a shape of a hole.

11. The rechargeable battery of claim 8, wherein the projection fixing part is formed in a shape of a groove.