FLEXIBLE ELECTRODE ASSEMBLY AND RECHARGEABLE BATTERY INCLUDING THE SAME

• US 20140363702A1
• Filed: 10/16/2013
• Published: 12/11/2014
• Est. Priority Date: 06/05/2013
• Status: Abandoned Application

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Kim, Bong-Young
• Application Number:
  US14/055,723
• Publication Number:
  US 20140363702A1
• Time in Patent Office: Days
• US Class Current: 429/7
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 10/0445 Multimode batteries, e.g. containing auxiliary cells or electrodes switchable in parallel or series connections
• CPC Class Codes: H01M 10/045 Cells or batteries with folded plate-like electrodes
• CPC Class Codes: H01M 50/112 Monobloc comprising multiple compartments
• CPC Class Codes: H01M 50/529 Intercell connections through partitions, e.g. in a battery casing
• 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 electrode assembly of the present invention having an electrode layer including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode includes a stacking portion where the electrode layer is overlapped and disposed, and a connection formed between the stacking portions to connect the stacking portions and having a smaller thickness than the stacking portion.

Claims

1. An electrode assembly having an electrode layer including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, comprising:

at least two stacking portions where the electrode layer is overlapped and disposed; and

a connection formed between stacking portions to connect the stacking portions and having a smaller thickness than the stacking portions.

2. The electrode assembly of claim 1, wherein the electrode layer is formed of a single layer in the connection.

3. The electrode assembly of claim 1, wherein the stacking portions are deposited while being folded.

4. The electrode assembly of claim 1, wherein the stacking portions are deposited while being rolled.

5. The electrode assembly of claim 4, wherein double-rolled electrode layers are rolled together in the stacking portions.

6. The electrode assembly of claim 1, wherein the connection includes a hole or a cutout portion.

7. The electrode assembly of claim 1, wherein

the positive electrode has a positive electrode active material layer and the negative electrode has an active material layer in the stacking portions, and

the positive electrode does not include the positive electrode active material layer and the negative electrode does not include the negative active material layer in the connection.

8. The electrode assembly of claim 1, wherein the connection includes an adhesive layer.

9. A rechargeable battery comprising:

an electrode assembly including at least two stacking portions having a first thickness and a connection having a second thickness smaller than the first thickness; and

a case receiving the stacking portions and having at least two groove portions.

10. The rechargeable battery of claim 9, wherein the case includes a first cover where at least two groove portions and an adhesion portion connecting the groove portions are formed, and a second cover coupled to the first cover.

11. The rechargeable battery of claim 10, wherein the groove portions and the adhesion portion are alternately arranged in one line.

12. The rechargeable battery of claim 10, wherein the electrode layer is formed of a single layer in the connection.

13. The rechargeable battery of claim 10, wherein the stacking portions are deposited while being bent.

14. The rechargeable battery of claim 10, wherein the stacking portions are deposited while being rolled.

15. The rechargeable battery of claim 14, wherein double-rolled electrode layers are rolled together in the stacking portions.

16. The rechargeable battery of claim 10, wherein the connection includes a hole or a cutout portion, and the adhesion portion is inserted into the hole or the cutout portion such that the first cover and the second cover are interconnected.

17. The rechargeable battery of claim 10, wherein:

the positive electrode has a positive electrode active material layer and the negative electrode has an active material layer in the stacking portions; and

the positive electrode does not include the positive electrode active material layer and the negative electrode does not include the negative active material layer in the connection.

18. The rechargeable battery of claim 10, wherein an adhesive layer is formed between the connection and the adhesion portion.

19. The rechargeable battery of claim 10, wherein the case is formed of a laminate film.

20. The rechargeable battery of claim 10, wherein the adhesion portion is flexible.

21. The rechargeable battery of claim 10, further comprising

a protective circuit module coupled to the case,

wherein the protective circuit module includes a mounting portion facing the groove portion and installed with a circuit element, and

a flexible portion formed between the mounting portions while facing the adhesion portion and not mounting the circuit element.

22. The rechargeable battery of claim 21, wherein the protective circuit module includes a flexible circuit board and a circuit element mounted thereto.

23. The rechargeable battery of claim 21, wherein the mounting portion is formed of a printing circuit board, and the flexible portion is formed of a cable connected to the printing circuit board.