Battery having specific package structure

• US 20050191549A1
• Filed: 01/27/2005
• Published: 09/01/2005
• Est. Priority Date: 01/30/2004
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Lee, Hyang Mok, Ahn, Chang bum, Hwang, Sung-Min, Hyun, Oh Young, Kang, Hee Gyoung
• Granted Patent: US 7,595,132 B2
• Time in Patent Office: Days
• US Class Current: 429/185
• CPC Class Codes: H01M 10/058 Construction or manufacture
• 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 50/55 on the same side of the cell
• CPC Class Codes: H01M 50/553 Terminals adapted for prismatic, pouch or rectangular cells
• 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

The present invention provides a battery having a structure for increasing the power storage capacity and output thereof In accordance with the present invention, in a battery comprising an electrode assembly including anode plates, cathode plates and separators; and a battery case, both side bonding portions of which are folded toward adjacent sides thereof, for accommodating the electrode assembly and a designated amount of electrolyte, and sealing the electrode assembly such that two electrode terminals connected to corresponding electrode taps of the anode and cathode plates of the electrode assembly are exposed to the outside, an upper bonding portion of the battery case is folded toward the upper end of the battery case, and/or common portions of the upper bonding portion and both side portions of the battery case are cut off, and/or inner corners corresponding to the upper bonding portion have larger radiuses of curvature, and/or receipt portions for receiving the electrode assembly are respectively formed in upper and lower bodies of the battery case. The battery having the above structure has high power storage capacity and output at the same size of the battery package, and high sealing capacity and safety.

Claims

1. A battery comprising:

an electrode assembly including anode plates, cathode plates, and separators; and

a battery case, both side bonding portions of which are folded toward adjacent sides thereof, for accommodating the electrode assembly and a designated amount of electrolyte, and sealing the electrode assembly such that two electrode terminals connected to corresponding electrode taps of the anode and cathode plates of the electrode assembly are exposed to the outside,

wherein an upper bonding portion of the battery case is folded toward the upper end of the battery case so that the length of the electrode assembly is increased to improve the power storage capacity and output of the battery, and the two electrode terminals disposed on the upper bonding portion are bent in the longitudinal direction of the battery case.

2. The battery as set forth in claim 1, wherein common portions of the upper bonding portion and both side portions of the battery case are cut off.

3. The battery as set forth in claim 2, wherein the cut-off ends of the common portions of the upper bonding portion and both side portions of the battery case are rounded.

4. The battery as set forth in claim 2, wherein in order to compensate for the widths of the bonding portions decreased by cutting off the common portions, inner corners corresponding to the upper bonding portion have large radiuses of curvature.

5. The battery as set forth in claim 1, wherein a protection circuit is disposed on the upper end of the battery case, toward which the upper bonding portion is folded, such that the rear surface of the protection circuit contacts the upper end.

6. The battery as set forth in claim 1, wherein the electrode assembly is a laminated-type electrode assembly or a jelly rolled-type electrode assembly.

7. The battery as set forth in claim 4, wherein the ends of the electrode assembly have shapes corresponding to the radiuses of curvature of the inner corners.

8. The battery as set forth in claim 1, wherein the battery case has one structure selected from the group consisting of:

(i) a structure, in which the lower end of an upper body is formed integrally with the lower end of a lower body, and a receipt portion is formed only in the lower body;

(ii) a structure, in which an upper body and a lower body are separated from each other, and a receipt portion is formed in the lower body;

(iii) a structure, in which an upper body and a lower body are separated from each other, and receipt portions are respectively formed in the upper body and the lower body; and

(iv) a structure, in which the lower end of an upper body is formed integrally with the lower end of a lower body, and receipt portions are respectively formed in the upper body and the lower body.

9. The battery as set forth in claim 8, wherein, when the upper and lower bodies are bonded to each other under the condition that the electrode assembly is placed in the upper and lower bodies of the battery case having one structure selected from the group consisting of (ii), (iii), and (iv), a sealing bonding portion is formed on the lower end of the battery case obtained by bonding the upper and lower bodies.

10. The battery as set forth in claim 8, wherein the battery case has one structure selected from the group consisting of (iii) and (iv).

11. The battery as set forth in claim 10, wherein the battery case has the structure of (iii).

12. The battery as set forth in claim 3, wherein in order to compensate for the widths of the bonding portions decreased by cutting off the common portions, inner corners corresponding to the upper bonding portion have large radiuses of curvature.