# US 12,113,250 B2 · Energy storage device

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- Number: US 12,113,250 B2
- Document ID: US12113250B2
- Status: Granted
- Kind: B2
- Application number: 17/261,525
- Filed: 2019-07-19
- Published: 2021-08-26
- Granted: 2024-10-08
- Earliest claimed: 2018-07-20
- Assignees: Dyson Technology Limited
- Applicants: Dyson Technology Limited
- Inventors: Joseph Daniel Howard; Michael Edward Rendall
- Web page: https://patentgrep.com/patent/US12113250B2

## CPC

- H01M 6/40: Printed batteries {, e.g. thin film batteries}
- H01M 6/18: with solid electrolyte
- H01M 10/0436: {Small-sized flat cells or batteries for portable equipment}
- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 50/586: inside the batteries, e.g. incorrect connections of electrodes
- H01M 2300/0065: Solid electrolytes
- 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

A method comprising providing, on a substrate, a stack for an energy storage device, the stack comprising a first electrode layer, a second electrode layer, and an electrolyte layer between the first electrode layer and the second electrode layer. A groove is formed at least through the second electrode layer and the electrolyte layer such that the groove is wider in the second electrode layer than in the electrolyte layer. An electrically insulating material is provided in the groove. An electrically conductive material is provided in the groove, on the electrically insulating material.

## Claims

### Claim 1

An energy storage device formed by a method comprising:
providing, on a substrate, a stack for an energy storage device, the stack comprising a first electrode layer, a second electrode layer, and an electrolyte layer between the first electrode layer and the second electrode layer;
forming a groove at least through the second electrode layer and the electrolyte layer such that the groove is wider in the second electrode layer than in the electrolyte layer;
providing an electrically insulating material in the groove; and
providing an electrically conductive material in the groove, on the electrically insulating material, in direct contact with a portion of the electrolyte layer and in direct contact with the second electrode layer.

### Claim 2

An energy storage device comprising:
a substrate;
a stack on the substrate, the stack comprising:
a first electrode;
a second electrode; and
an electrolyte between the first electrode and the second electrode, the first electrode closer than the second electrode to the substrate, the electrolyte comprising a first portion overlapped by the second electrode and a second portion not overlapped by the second electrode;
an electrically insulating material in contact with the first electrode and the electrolyte; and
an electrically conductive material in direct contact with the second portion of the electrolyte and the second electrode.

### Claim 3 (depends on 2)

The energy storage device of claim 2, wherein a width of a surface of the second portion of the electrolyte, in a plane parallel to a plane of a surface of the substrate, is greater than or equal to approximately 5 micrometres.

### Claim 4 (depends on 2)

The energy storage device of claim 2, wherein the electrically insulating material is absent from contact with the second electrode.