STACKED ELECTROCHEMICAL CELL WITH INCREASED ENERGY DENSITY

• US 20150349372A1
• Filed: 06/02/2014
• Published: 12/03/2015
• Est. Priority Date: 06/02/2014
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Inventors: Maleki, Hossein, Hallmark, Jerald, Howard, Jason
• Granted Patent: US 9,865,897 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• 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
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

An electrochemical cell assembly (500) includes a first cell and a second cell. The first cell can include a first anode (503) and a first cathode (504), wound in a first jellyroll assembly (501) with a first jellyroll assembly exterior defined by the first cathode. The second cell can include a second anode (512) and a second cathode (513), wound in a second jellyroll assembly (502) with a second jellyroll assembly exterior defined by the second anode. The first cell and the second cell can be arranged in a housing with the first jellyroll assembly exterior adjacent to the second jellyroll assembly exterior to improve energy density. The first cell assembly and the second cell assembly can have different widths to create differently shaped cell assemblies.

Claims

1. An electrochemical cell assembly, comprising:

a first cell; and

a second cell;

the first cell comprising;

a first anode and a first cathode, wound in a first jellyroll assembly with a first jellyroll assembly exterior defined by the first cathode;

the second cell comprising;

a second anode and a second cathode, wound in a second jellyroll assembly with a second jellyroll assembly exterior defined by the second anode;

the first cell and the second cell arranged in a housing with the first jellyroll assembly exterior adjacent to the second jellyroll assembly exterior.

2. The electrochemical cell assembly of claim 1:

the first anode and the first cathode separated by a first separator;

the second anode and the second cathode separated by a second separator; and

the first jellyroll assembly exterior and the second jellyroll assembly exterior separated by one of;

a third separator, a portion of the first separator, or a portion of the second separator.

3. The electrochemical cell assembly of claim 1:

the first jellyroll assembly having a first width;

the second jellyroll assembly having a second width;

the second width greater than the first width.

4. The electrochemical cell assembly of claim 1, the first cathode comprising an electrochemically active material disposed along a current collecting layer, the electrochemically active material selectively disposed along a portion of the current collecting layer at the first jellyroll assembly exterior.

5. The electrochemical cell assembly of claim 4, the portion comprising only where the first jellyroll assembly exterior is adjacent to the second jellyroll assembly exterior.

6. The electrochemical cell assembly of claim 5, the anode comprising another electrochemically active material disposed along another current collecting layer, the another electrochemically active material disposed along an area of the second jellyroll assembly, the area greater than the portion.

7. The electrochemical cell assembly of claim 6, the area comprising an entirety of the second jellyroll assembly exterior.

8. The electrochemical cell assembly of claim 5, the electrochemically active material disposed on both sides of the current collecting layer along turns of the first jellyroll assembly interior to the first jellyroll assembly exterior.

9. The electrochemical cell assembly of claim 1, the first jellyroll assembly and the second jellyroll assembly wound in opposite directions.

10. An electrochemical cell assembly, comprising:

a first cell; and

a second cell;

the first cell comprising;

a first anode and a first cathode, wound in a first jellyroll assembly with a first jellyroll assembly exterior defined by the first anode;

the second cell comprising;

a second anode and a second cathode, wound in a second jellyroll assembly with a second jellyroll assembly exterior defined by the second cathode;

the first cell and the second cell arranged in a housing with the first jellyroll assembly exterior adjacent to the second jellyroll assembly exterior;

the first anode comprising electrochemically active material disposed on an area of the first jellyroll assembly exterior;

the second cathode comprising another electrochemically active material selectively disposed on a portion of the second jellyroll assembly exterior;

the area greater than the portion.

11. The electrochemical cell assembly of claim 10, the portion comprising only where the first jellyroll assembly exterior is adjacent to the second jellyroll assembly exterior.

12. The electrochemical cell assembly of claim 11, the portion comprising an entirety of the first jellyroll assembly exterior.

13. The electrochemical cell assembly of claim 12, further comprising a current collection layer, the another electrochemically active material disposed on both sides of the current collection layer.

14. The electrochemical cell assembly of claim 11, the area comprising less than an entirety of the first jellyroll assembly exterior.

15. The electrochemical cell assembly of claim 14:

the first jellyroll assembly having a first width;

the second jellyroll assembly having a second width;

the second width greater than the first width.

16. The electrochemical cell assembly of claim 15:

the first anode and the first cathode separated by a first separator;

the second anode and the second cathode separated by a second separator; and

the first jellyroll assembly exterior and the second jellyroll assembly exterior separated by a third separator.

17. The electrochemical cell assembly of claim 16, the third separator an extension of one or the first separator or the second separator.

18. A method of manufacturing an electrochemical cell assembly, comprising:

selectively depositing an electrochemically active material on a current collection layer to obtain a first cathode;

forming, from the first cathode, a first anode, and a first separator, a first jellyroll assembly with a first exterior defined by the first cathode, with the electrochemically active material deposited only on a portion of the first exterior;

forming, from a second cathode, a second anode, and a second separator, a second jellyroll assembly with a second exterior defined by the second anode; and

disposing the first jellyroll assembly and the second jellyroll assembly in a housing with the portion of the first exterior adjacent to the second exterior.

19. The method of claim 18, further comprising selectively depositing another electrochemically active material to obtain the second anode, the another electrochemically active material deposited along an area greater than that upon which the electrochemically active material is deposited.

20. The method of claim 19, one of the first jellyroll assembly or the second jellyroll assembly having a width less than another of the first jellyroll assembly or the second jellyroll assembly.