RECHARGEABLE BATTERY

• US 20110129720A1
• Filed: 11/17/2010
• Published: 06/02/2011
• Est. Priority Date: 12/01/2009
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Yun, Hee-Sun
• Granted Patent: US 9,196,888 B2
• Time in Patent Office: Days
• US Class Current: 429/159
• CPC Class Codes: H01M 10/02 Details of electrodes H01M4/00; of non-active parts H01M50/00
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 10/0477 with circular plates
• CPC Class Codes: H01M 50/107 having curved cross-section, e.g. round or elliptic H01M50/103, H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: H01M 50/503 characterised by the shape of the interconnectors
• CPC Class Codes: H01M 50/522 Inorganic material
• CPC Class Codes: H01M 50/538 Connection of several leads or tabs of wound or folded electrode stacks
• 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 rechargeable battery is constructed with a plurality of electrode assemblies disposed at a distance from each other, a first current collecting plate disposed at one side of the plurality of electrode assemblies, a second current collecting plate disposed at an opposite side of the plurality of the electrode assemblies, the first and second current collecting plates being electrically connected with the electrode assemblies, a case housing the electrode assemblies, the first current collecting plate, and the second current collecting plate, and an electrode terminal provided in the case, and electrically connected with at least one of the first and second current collecting plates. Each one of the first and second current collecting plates is constructed with a plurality of current collecting portions fixed to and electrically connected to the electrode assemblies, each current collecting portion corresponding to a respective electrode assembly, a connection portion electrically connecting at least two of the current collecting portions, and an insulating supporter supporting the current collecting portions and the connection portion by surrounding the current collecting portions and the connection portion. The insulating supporter includes a plurality of openings exposing the plurality of current collecting portions, and each opening corresponds to a respective current collecting portion.

Claims

1. A rechargeable battery, comprising:

a plurality of electrode assemblies disposed at a distance from each other;

a first current collecting plate disposed at one side of the plurality of the electrode assemblies;

a second current collecting plate disposed at an opposite side of the plurality of the electrode assemblies, the first and second current collecting plates being electrically connected with the electrode assemblies;

a case housing the electrode assemblies, the first current collecting plate, and the second current collecting plate; and

an electrode terminal provided in the case, and electrically connected with at least one of the first and second current collecting plates,

wherein each one of the first and second current collecting plates comprises;

a plurality of current collecting portions fixed to and electrically connected to the electrode assemblies, each current collecting portion corresponding to a respective electrode assembly;

a connection portion electrically connecting at least two of the current collecting portions; and

is an insulating supporter supporting the current collecting portions and the connection portion by surrounding the current collecting portions and the connection portion,

the insulating supporter comprising a plurality of openings exposing the plurality of current collecting portions, and

each opening corresponding to a respective current collecting portion.

2. The rechargeable battery of claim 1, wherein each of the electrode assemblies is formed by being wound in a jelly roll shape, and comprises a positive electrode uncoated region disposed at one side of the electrode assembly and a negative electrode uncoated region disposed at an opposite side of the electrode assembly.

3. The rechargeable battery of claim 2, wherein the electrode assemblies are arranged in a way that the positive electrode uncoated regions of the electrode assemblies are disposed at a first side of the electrode assemblies, and the negative electrode uncoated regions of the electrode assemblies are disposed at a second and opposite side of the electrode assemblies.

4. The rechargeable battery of claim 3, wherein the electrode assemblies are arranged in a matrix form having a plurality of columns and a plurality of rows, and

in each of the first and second current collecting plates, the connection portion is disposed between neighboring current collecting portions along a column direction and a row direction of the matrix to electrically connect all of the current collecting portions.

5. The rechargeable battery of claim 4, wherein,

the first current collecting plate comprises a first extension tab extending from one of the current collecting portions of the first current collecting plate to an external side of the insulating supporter of the first current collecting plate, and

the second current collecting plate comprises a second extension tab extending from one of the current collecting portions of the second current collecting plate to an external side of the insulating supporter of the second current collecting plate.

6. The rechargeable battery of claim 5, wherein the electrode terminal comprises a positive electrode terminal and a negative electrode terminal, and one of the first and second extension tabs is fixed to the positive electrode terminal, and the other one of the first and second extension tabs is fixed to the negative electrode terminal.

7. The rechargeable battery of claim 2, wherein the electrode assemblies are arranged in a matrix form having a plurality of columns and a plurality of rows,

a positive electrode uncoated region of each one of the electrode assemblies and negative electrode uncoated regions of neighboring electrode assemblies along both a column and a row direction of the matrix are disposed at the same side of the electrode assemblies, and

a negative electrode uncoated region of each one of the electrode assemblies and positive electrode uncoated regions of neighboring electrode assemblies along both the column and the row direction are disposed at the same side of the electrode assemblies.

8. The rechargeable battery of claim 7, wherein, in each one of the first and second current collecting plates, the connection portion is disposed between two neighboring current collecting portions along either one of the column direction and the row direction, such that the two neighboring current collecting portions and said connection portion form an individual set.

9. The rechargeable battery of claim 8, wherein the connection portions of the first and second current collecting plates are disposed in different locations along the axis direction, and the connection portions and the current collecting portions of the first and second current collecting plates and the plurality of electrode assemblies form an electrically conductive path in one direction from a first outmost electrode assembly to a second outmost electrode assembly.

10. The rechargeable battery of claim 9, wherein one of the first and second current collecting plates comprises a first extension tab and a second extension tab,

the first extension tab is extended from a current collecting portion corresponding to the first outmost electrode assembly to an external side of the insulating supporter, and

the second extension tab is extended from another current collecting portion corresponding to the second outmost electrode assembly to another external side of the insulating supporter.

11. The rechargeable battery of claim 10, wherein the electrode terminal comprises a positive electrode terminal and a negative electrode terminal, and one of the first and second extension tabs is fixed to the positive electrode terminal and the other one of the first and second extension tabs is fixed to the negative electrode terminal.

12. The rechargeable battery of claim 2, wherein in each one of the first and second current collecting plates, the insulating supporter comprises:

a first insulation film disposed at one side of the plurality of the current collecting portions and the connection portion,

a second insulation film disposed at an opposite side of the plurality of the current collecting portions and the connection portion, and air-tightly attached to the first insulation film, and

an opening formed in each of the first and second insulation films.

13. The rechargeable battery of claim 2, wherein the current collecting portions are formed in a shape corresponding to a shape of the positive and negative electrode uncoated regions, and the connection portion has a width that is smaller than a maximum width of the current collecting portion.

14. The rechargeable battery of claim 2, wherein the current collection portions and the connection portion are formed in a band shape connected in one direction while having the same width.

15. The rechargeable battery of claim 2, further comprising at least one spacer disposed between the neighboring electrode assemblies and air-tightly attached to the neighboring electrode assemblies.

16. The rechargeable battery of claim 2, wherein each one of the current collecting portion comprises at least one protruding portion at one side of the current collecting portion facing the electrode assembly, so as to increase a contact area with the electrode assembly.