Stacked electrochemical cell with increased energy density
First Claim
1. An electrochemical cell assembly, comprising:
- a first cell; and
a second cell;
the first cell having a first width, 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, a portion of the first cathode extending along one or more turns of the first jellyroll assembly;
the second cell having a second width being greater than the first width, 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; and
the first cell and the second cell arranged in a housing with the first jellyroll assembly exterior adjacent to the second jellyroll assembly exterior such that the second anode includes an anode area of electrochemically active material on the second jellyroll assembly exterior that is greater than a cathode area of the first cathode on the first jellyroll assembly exterior at a cathode to anode abutment.
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Accused Products
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.
175 Citations
20 Claims
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1. An electrochemical cell assembly, comprising:
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a first cell; and a second cell; the first cell having a first width, 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, a portion of the first cathode extending along one or more turns of the first jellyroll assembly; the second cell having a second width being greater than the first width, 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; and the first cell and the second cell arranged in a housing with the first jellyroll assembly exterior adjacent to the second jellyroll assembly exterior such that the second anode includes an anode area of electrochemically active material on the second jellyroll assembly exterior that is greater than a cathode area of the first cathode on the first jellyroll assembly exterior at a cathode to anode abutment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electrochemical cell assembly, comprising:
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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, a portion of the first anode extending along one or more turns of the first jellyroll assembly;
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 at a cathode to anode abutment; 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; and the area of the first jellyroll assembly exterior being greater than the portion of the second jellyroll assembly exterior. - View Dependent Claims (11, 12, 13, 14)
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15. A method of manufacturing an electrochemical cell assembly, comprising:
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selectively depositing an electrochemically active material on a current collection layer to obtain a first cathode; forming a first jellyroll assembly from the first cathode, a first anode, and a first separator, the first jellyroll assembly including a first exterior defined by the first cathode, a portion of the first cathode extending along one or more turns of an interior of the first jellyroll assembly, the first exterior including the electrochemically active material deposited only on a portion of the first exterior; forming a second jellyroll assembly from a second cathode, a second anode, and a second separator, the second jellyroll assembly including a second exterior defined by the second anode, the second exterior having an additional electrochemically active material disposed on an area of the second exterior; and disposing the first jellyroll assembly and the second jellyroll assembly in a housing with the portion of the first exterior adjacent to the area of the second exterior at a cathode to anode abutment, the area of the second exterior being greater than the portion of the first exterior. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification