# US 2016/0365584 A1 · Battery

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- Number: US 2016/0365584 A1
- Document ID: US20160365584A1
- Status: Published application
- Kind: A1
- Application number: 15/249,164
- Filed: 2016-08-26
- Published: 2016-12-15
- Earliest claimed: 2014-01-24
- Assignees: Verily Life Sciences LLC
- Applicants: Verily Life Sciences LLC
- Inventors: James Etzkorn; Ramesh Bhardwaj
- Web page: https://patentgrep.com/patent/US20160365584A1

## CPC

- H01M 6/40: Printed batteries {, e.g. thin film batteries}
- H01M 6/181: {with polymeric electrolytes}
- H01M 6/187: {Solid electrolyte characterised by the form}
- H01M 10/0436: {Small-sized flat cells or batteries for portable equipment}
- H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence)
- H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence)
- H01M 50/119: Metals
- H01M 50/121: Organic material
- H01M 50/24: adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658)
- H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop
- H01M 2300/0085: Immobilising or gelification of electrolyte
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- Y10T 156/10: Methods of surface bonding and/or assembly therefor
- 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
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A battery includes an electrolyte disposed on a substantially planar substrate. The electrolyte has a first surface extending from the substrate and in contact with a cathode. The electrolyte has a second surface extending from the substrate and in contact with an anode. The second surface is opposite the first surface. The anode and the cathode are non-overlapping. The battery additionally includes a biocompatible protective layer that covers the electrolyte and at least portions of the anode and cathode. The battery can be disposed in an eye-mountable device or other device to power electronics in the device. The battery can be configured to be rechargeable.

## Claims

### Claim 1

A battery, comprising:
a substrate;
an electrolyte disposed on the substrate, wherein the electrolyte has a first surface extending from the substrate and a second surface extending from the substrate and opposite the first surface, wherein the first and second surfaces of the electrolyte are less than about 100 microns apart;
a cathode disposed on the substrate and in contact with the first surface of the electrolyte;
an anode disposed on the substrate and in contact with the second surface of the electrolyte, wherein the anode and cathode are non-overlapping; and
a biocompatible protective layer, wherein the biocompatible protective layer covers the electrolyte and at least portions of the cathode and anode.

### Claim 2 (depends on 1)

The battery of claim 1, wherein the battery has an overall thickness defined by respective thicknesses of the substrate, the biocompatible protective layer, and a thickest portion of the electrolyte, cathode, and anode between the substrate and the biocompatible protective layer, wherein the overall thickness is less than about 50 microns.

### Claim 3 (depends on 1)

The battery of claim 1, wherein the biocompatible protective layer comprises parylene.

### Claim 4 (depends on 1)

The battery of claim 1, wherein the substrate comprises silicon.

### Claim 5 (depends on 1)

The battery of claim 1, wherein the electrolyte comprises a gel polymer.

### Claim 6 (depends on 5)

The battery of claim 5, wherein the gel polymer comprises polyacrylonitrile, propylene carbonate, ethylene carbonate, and zinc trifluoromethane sulfonate.

### Claim 7

(canceled)

### Claim 8 (depends on 1)

The battery of claim 1, further comprising:
a second electrolyte disposed on the substrate, wherein the second electrolyte has a first surface extending from the substrate and a second surface extending from the substrate and opposite the first surface;
a second cathode disposed on the substrate and in contact with the first surface of the second electrolyte; and
a second anode disposed on the substrate and in contact with the second surface of the second electrolyte, wherein the second anode and second cathode are non-overlapping;
wherein the biocompatible protective layer additionally covers the second electrolyte and at least portions of the second cathode and second anode.

### Claim 9 (depends on 1)

The battery of claim 1, wherein the electrolyte is configured as a closed loop.

### Claim 10 (depends on 1)

The battery of claim 1, wherein the electrolyte has a spiral shape.

### Claim 11

A body-mountable device comprising:
a shaped polymeric material; and
a battery embedded within the shaped polymeric material, wherein the battery comprises:
a substrate;
an electrolyte disposed on the substrate, wherein the electrolyte has a first surface extending from the substrate and a second surface extending from the substrate and opposite the first surface, wherein the first and second surfaces of the electrolyte are less than about 100 microns apart;
a cathode disposed on the substrate and in contact with the first surface of the electrolyte;
an anode disposed on the substrate and in contact with the second surface of the electrolyte, wherein the anode and cathode are non-overlapping; and
a biocompatible protective layer, wherein the biocompatible protective layer covers the electrolyte and at least portions of the cathode and anode.

### Claim 12 (depends on 11)

The body-mountable device according to claim 11, further comprising electronics embedded in the shaped polymeric material.

### Claim 13 (depends on 11)

The body-mountable device according to claim 11, wherein the shaped polymeric material has a concave surface that can be removably mounted over a corneal surface of an eye and a convex surface opposite the concave surface.

### Claim 14 (depends on 11)

The body-mountable device of claim 11, wherein the battery has an overall thickness defined by respective thicknesses of the substrate, the biocompatible protective layer, and a thickest portion of the electrolyte, cathode, and anode between the substrate and the biocompatible protective layer, wherein the overall thickness is less than about 50 microns.

### Claim 15 (depends on 11)

The body-mountable device of claim 11, wherein the electrolyte comprises a gel polymer.

### Claim 16 (depends on 15)

The body-mountable device of claim 15, wherein the gel polymer comprises polyacrylonitrile, propylene carbonate, ethylene carbonate, and zinc trifluoromethane sulfonate.

### Claim 17 (depends on 11)

The body-mountable device of claim 11, wherein the biocompatible protective layer comprises parylene.

### Claim 18 (depends on 11)

The body-mountable device of claim 11, wherein the battery further comprises:
a second electrolyte disposed on the substrate, wherein the second electrolyte has a first surface extending from the substrate and a second surface extending from the substrate and opposite the first surface;
a second cathode disposed on the substrate and in contact with the first surface of the second electrolyte; and
a second anode disposed on the substrate and in contact with the second surface of the second electrolyte, wherein the second anode and second cathode are non-overlapping;
wherein the biocompatible protective layer additionally covers the second electrolyte and at least portions of the second cathode and second anode.

### Claim 19

A method comprising:
forming a substrate;
forming an electrolyte on the substrate, such that the electrolyte has a first surface extending from the substrate and a second surface extending from the substrate and opposite the first surface, wherein the first and second surfaces of the electrolyte are less than about 100 microns apart;
forming a cathode on the substrate, such that the cathode is in contact with the first surface of the electrolyte;
forming an anode on the substrate, such that the anode is in contact with the second surface of the electrolyte, and the anode and cathode are non-overlapping; and
forming a biocompatible protective layer, such that the biocompatible protective layer covers the electrolyte and at least portions of the cathode and anode.

### Claim 20 (depends on 19)

The method of claim 19, further comprising at least partially embedding the substrate and components disposed thereon in a shaped polymeric material, wherein the shaped polymeric material has a concave surface that can be removably mounted over a corneal surface of an eye and a convex surface opposite the concave surface.