Electrode package and secondary battery using the same

• US 20050260489A1
• Filed: 05/18/2005
• Published: 11/24/2005
• Est. Priority Date: 05/19/2004
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Kim, Hyon-Sok
• Granted Patent: US 8,173,291 B2
• Time in Patent Office: Days
• US Class Current: 429/122
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 4/667 in the form of layers, e.g. coatings
• CPC Class Codes: H01M 4/70 characterised by shape or form
• CPC Class Codes: H01M 50/528 Fixed electrical connections, i.e. not intended for disconnection
• CPC Class Codes: H01M 50/533 characterised by the shape of the leads or tabs
• CPC Class Codes: H01M 50/536 characterised by the method of fixing the leads to the electrodes, e.g. by welding
• CPC Class Codes: H01M 50/538 Connection of several leads or tabs of wound or folded electrode stacks
• CPC Class Codes: H01M 50/627 Filling ports
• 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 includes an electrode assembly having a positive electrode, a negative electrode and a separator interposed between those two electrodes. The secondary battery also includes a container for receiving the electrode assembly inside thereof; a cap assembly electrically connected to the electrode assembly and fixed to the container to seal the container; collector plates electrically connected to the positive electrode and the negative electrodes, and an auxiliary collector plate disposed between at least either the positive or negative electrode and the collector plate corresponding to that electrode.

Claims

1. A secondary battery comprising:

an electrode assembly including a positive electrode, a negative electrode and a separator interposed between the positive electrode and the negative electrode;

a container adapted to receive the electrode assembly inside thereof;

a cap assembly electrically connected to the electrode assembly and fixed to the container to seal the container;

a positive collector plate electrically connected to the positive electrode and a negative collector plate connected to the negative electrode; and

an auxiliary collector plate disposed between at least one electrode of the positive electrode and negative electrode and a collector plate corresponding to the at least one positive electrode and negative electrode.

2. The secondary battery of claim 1, wherein each of the positive electrode and negative electrode has an uncoated region absent an active material along the edge thereof, and each of the positive collector plate and negative collector plate is electrically connected to the corresponding uncoated region of the positive electrode and negative electrode, respectively.

3. The secondary battery of claim 1, wherein the auxiliary collector plate is disposed between the positive electrode and the collector plate corresponding to the positive electrode.

4. The secondary battery of claim 1, wherein the auxiliary collector plate is disposed between the negative electrode and the collector plate corresponding to the negative electrode.

5. The secondary battery of claim 1, wherein the auxiliary collector plate is arranged in a position corresponding to a welding portion of the collector plate.

6. The secondary battery of claim 5, wherein the auxiliary collector plate is formed in a cross shape.

7. The secondary battery of claim 1, wherein the auxiliary collector plate has substantially the same outer configuration as that of the collector plate.

8. The secondary battery of claim 7, wherein the auxiliary collector plate has a hole formed in a position corresponding to an electrolyte injection hole of the collector plate.

9. The secondary battery of claim 1, wherein the auxiliary collector plate is made of the same material as that of a collector of the electrode.

10. The secondary battery of claim 1, wherein the auxiliary collector plate is made of the same material as that of the collector plate.

11. The secondary battery of claim 1, wherein the auxiliary collector plate has the same thickness as that of a collector of the electrode.

12. The secondary battery of claim 1, wherein the secondary battery has a cylindrical shape.

13. The secondary battery of claim 1, wherein the secondary battery is a motor driven device battery.