Battery

Patent metadata

Field	Value
Publication number	US-2016365584-A1
Application number	US-201615249164-A
Country	US
Kind code	A1
Filing date	Aug 26, 2016
Priority date	Jan 24, 2014
Publication date	Dec 15, 2016
Grant date	—

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.

First 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.

2 . 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.

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

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

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

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

7 . (canceled)

8 . 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.

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

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

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.

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

13 . 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.

14 . 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.

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

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

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

18 . 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.

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.

20 . 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.

Assignees

• Verily Life Sciences Llc

Inventors

• Etzkorn James
• Bhardwaj Ramesh

Classifications

• H01M50/107

  having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/103

  prismatic or rectangular (H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/119

  Metals · CPC title

• H01M50/121

  Organic material · CPC title

• H01M2300/0085

  Immobilising or gelification of electrolyte · CPC title