# US 10,763,535 B2 · Variable layer thickness in curved battery cell

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- Number: US 10,763,535 B2
- Document ID: US10763535B2
- Status: Granted
- Kind: B2
- Application number: 16/236,166
- Filed: 2018-12-28
- Published: 2019-05-09
- Granted: 2020-09-01
- Earliest claimed: 2016-08-29
- Assignees: Microsoft Technology Licensing, LLC
- Applicants: Microsoft Technology Licensing, LLC
- Inventors: Michael Nikkhoo; Vijayasekaran Booveragavan; Dongli Zeng; Tzu-Yuan Lin; John Christopher Collins
- Web page: https://patentgrep.com/patent/US10763535B2

## CPC

- H01M 10/0436: {Small-sized flat cells or batteries for portable equipment}
- G06F 1/1613: {for portable computers (cooling arrangements therefor G06F1/203; constructional details or arrangements for pocket calculators, electronic agendas or books G06F15/0216; constructional details of portable telephone sets: with several bodies H04M1/0202)}
- G06F 1/163: {Wearable computers, e.g. on a belt}
- H01M 4/78: Shapes other than plane or cylindrical, e.g. helical
- H01M 6/42: Grouping of primary cells into batteries (H01M6/40 takes precedence)
- H01M 50/267: having means for adapting to batteries or cells of different types or different sizes
- H04M 1/0262: {for a battery compartment}
- H05K 5/0086: {portable, e.g. battery operated apparatus (casings for switching devices H01H9/02)}
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/025: {with shapes other than plane or cylindrical}
- H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop
- 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
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- 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

Examples are disclosed herein that relate to curved batteries. One example provides a battery comprising an anode arranged on an anode substrate, a cathode arranged on a cathode substrate, the anode substrate being curved at a first curvature and the cathode substrate being curved at a second curvature, and a separator between the anode and the cathode. A thickness of the anode substrate and a thickness of the cathode substrate are determined based on the curvature of the respective substrate, such that the one of the anode substrate and the cathode substrate with a larger curvature has a larger thickness.

## Claims

### Claim 1

A battery, comprising:
a first cell comprising a set of layers including an anode, a cathode, and a separator configured to electrically isolate the anode and the cathode of the first cell, a layer of the set of layers of the first cell having a first curvature; and
a second cell comprising a set of layers including an anode, a cathode, and a separator configured to electrically isolate the anode and the cathode of the second cell, a layer of the set of layers of the second cell having a second curvature, the second curvature differing from the first curvature in a cross-sectional plane defined by a radial direction and a circumferential direction, the first curvature and the second curvature being separated from a common center of curvature in the cross-sectional plane by respective radial distances along the radial direction.

### Claim 2 (depends on 1)

The battery of claim 1, wherein the anode and the cathode of the first cell have a substantially common curvature.

### Claim 3 (depends on 1)

The battery of claim 1, wherein the anode of the first cell and the anode of the second cell have differing curvatures.

### Claim 4 (depends on 1)

The battery of claim 1, wherein the layer of the set of layers of the first cell has a first thickness, and wherein the layer of the set of layers of the second cell has a second thickness different from the first thickness.

### Claim 5 (depends on 1)

The battery of claim 1, wherein the anode of the first cell is arranged on an anode substrate, and wherein the cathode of the first cell is arranged on a cathode substrate.

### Claim 6 (depends on 5)

The battery of claim 5, wherein the anode substrate and the cathode substrate have a substantially common curvature.

### Claim 7 (depends on 1)

The battery of claim 1, wherein the first cell and the second cell are electrically coupled together.

### Claim 8 (depends on 1)

The battery of claim 1, wherein the first cell has a first thickness, and wherein the second cell has a second thickness different from the first thickness.

### Claim 9 (depends on 1)

The battery of claim 1, wherein the first cell has a first cell curvature, and wherein the second cell has a second cell curvature different from the first cell curvature.

### Claim 10 (depends on 1)

The battery of claim 1, wherein a thickness of the layer of the set of layers of the first cell is determined by the first curvature, and wherein a thickness of the layer of the set of layers of the second cell is determined by the second curvature.

### Claim 11 (depends on 1)

The battery of claim 1, wherein the first cell and the second cell are arranged in a housing having a tapered shape.

### Claim 12

A battery, comprising:
a first cell comprising an anode, a cathode, and a separator configured to electrically isolate the anode and the cathode of the first cell, the first cell having a first curvature; and
a second cell comprising an anode, a cathode, and a separator configured to electrically isolate the anode and the cathode of the second cell, the second cell having a second curvature, the second curvature differing from the first curvature in a cross-sectional plane defined by a radial direction and a circumferential direction, the first curvature and the second curvature being separated from a common center of curvature in the cross-sectional plane by respective radial distances along the radial direction.

### Claim 13 (depends on 12)

The battery of claim 12, wherein the anode and the cathode of the first cell have a substantially common curvature.

### Claim 14 (depends on 12)

The battery of claim 12, wherein the anode and the cathode of the first cell have a substantially common thickness.

### Claim 15 (depends on 12)

The battery of claim 12, wherein the first cell and the second cell have differing thicknesses.

### Claim 16 (depends on 12)

The battery of claim 12, wherein a thickness of the first cell is determined by the first curvature of the first cell, and wherein a thickness of the second cell is determined by the second curvature of the second cell.

### Claim 17 (depends on 12)

The battery of claim 12, wherein the first cell and the second cell are arranged in a housing having a tapered shape.

### Claim 18

A portable electronic device, comprising:
a display;
a processor and memory; and
a battery configured to power the portable electronic device, the battery comprising:
a first cell comprising a set of layers including an anode, a cathode, and a separator configured to electrically isolate the anode and the cathode of the first cell, a layer of the set of layers of the first cell having a first curvature; and
a second cell comprising a set of layers including an anode, a cathode, and a separator configured to electrically isolate the anode and the cathode of the second cell, a layer of the set of layers of the second cell having a second curvature, the second curvature differing from the first curvature in a cross-sectional plane defined by a radial direction and a circumferential direction, the first curvature and the second curvature being separated from a common center of curvature in the cross-sectional plane by respective radial distances along the radial direction.

### Claim 19 (depends on 18)

The portable electronic device of claim 18, wherein the anode and the cathode of the first cell have a substantially common curvature.

### Claim 20 (depends on 18)

The portable electronic device of claim 18, wherein the layer of the set of layers of the first cell has a first thickness, and wherein the layer of the set of layers of the second cell has a second thickness different from the first thickness.