# US 2024/0204239 A1 · Low-Emission Cylindrical-Winding Battery Design

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- Number: US 2024/0204239 A1
- Document ID: US20240204239A1
- Status: Published application
- Kind: A1
- Application number: 18/593,008
- Filed: 2024-03-01
- Published: 2024-06-20
- Earliest claimed: 2024-02-23
- Assignees: Google Inc.
- Applicants: Google LLC
- Inventors: Jianmin Zhang; Mingfeng Xue; Chi Kin Benjamin Leung; Ramesh C. Bhardwaj; Sheba Devan
- Web page: https://patentgrep.com/patent/US20240204239A1

## CPC

- H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)}
- H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
- H01M 50/497: Ionic conductivity
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present document describes a low-emission cylindrical-winding battery design. The battery design is a rolled and stacked battery, with two or more winding rolls of cathode and anode layers separated by insulation layers, the winding rolls also being separated by a distance with the distance, in some embodiments, filled with a dielectric material. A first winding roll of first stacked anode and cathode layers and a second winding roll of second stacked anode and cathode layers are wound in a direction around a central axis of the battery. The first winding roll of first stacked anode and cathode layers follows a first stacking order with the anode and cathode layers alternating. The second winding roll of second stacked anode and cathode layers follows a second stacking order with the anode and cathode layers alternating opposite to the first stacking order. The alternating stacking orders cause the battery to produce a reduced H-field when compared with a battery having non-alternating stacking orders.

## Claims

### Claim 1

A battery having a symmetry about an axis and comprising:
a first plurality of layers, the first plurality of layers:
comprising first alternating cathode and anode layers, the first alternating cathode and anode layers electrically isolated from one another; and
disposed such that the first plurality of layers define a first cylindrical-winding roll about the axis; and
a second plurality of layers, the second plurality of layers:
comprising second alternating cathode and anode layers, the second alternating cathode and anode layers electrically isolated from one another; and
disposed such that:
the second plurality of layers define a second cylindrical-winding roll about the axis, the second cylindrical-winding roll adjacent to and electrically isolated from the first cylindrical-winding roll; and
the second alternating cathode and anode layers being arranged about the axis in an opposite order as the first alternating anode and cathode layers.

### Claim 2 (depends on 1)

The battery of claim 1, further comprising:
an outer negative terminal for providing a current to both the first plurality of layers and the second plurality of layers, the outer negative terminal in electrical connection to the first anode layers and the second anode layers at their farthest point from the axis; and
an outer positive terminal for collecting the current within the first plurality of layers and the second plurality of layers, the outer positive terminal in electrical connection to the first cathode layers and the second cathode layers at their farthest point from the axis.

### Claim 3 (depends on 1)

The battery of claim 1, further comprising:
an inner negative terminal for providing a current to both the first plurality of layers and the second plurality of layers, the inner negative terminal in electrical connection to the first anode layers and the second anode layers at their closest point from the axis; and
an inner positive terminal for collecting the current within the first plurality of layers and the second plurality of layers, the inner positive terminal in electrical connection to the first cathode layers and the second cathode layers at their closest point from the axis.

### Claim 4 (depends on 1)

The battery of claim 1, wherein the electric isolation of the first plurality of layers from the second plurality of layers is achieved using a dielectric isolation layer therebetween.

### Claim 5 (depends on 1)

The battery of claim 1, wherein the symmetry is a radial symmetry about the axis, the axis being a central axis.

### Claim 6 (depends on 1)

The battery of claim 1, further comprising a third plurality of layers, the third plurality of layers:
comprising third alternating cathode and anode layers, the third alternating cathode and anode layers electrically isolated from one another; and
disposed such that:
the third plurality of layers define a third cylindrical-winding roll about the axis, the third cylindrical-winding roll adjacent to and electrically isolated from the second cylindrical-winding roll; and
the third alternating cathode and anode layers being arranged about the axis in a same order as the first alternating anode and cathode layers.

### Claim 7 (depends on 6)

The battery of claim 6, wherein the electric isolation of the third plurality of layers from the second plurality of layers is achieved using a dielectric isolation layer therebetween.

### Claim 8 (depends on 1)

The battery of claim 1, wherein the first cylindrical-winding roll and the second cylindrical-winding roll are separated by a distance.