Variable layer thickness in curved battery cell

Patent metadata

Field	Value
Publication number	US-10763535-B2
Application number	US-201816236166-A
Country	US
Kind code	B2
Filing date	Dec 28, 2018
Priority date	Aug 29, 2016
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

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.

First claim

The invention claimed is:

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.

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

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

4. 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.

5. 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.

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

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

8. 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.

9. 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.

10. 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.

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

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.

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

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

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

16. 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.

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

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.

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

20. 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.

Assignees

• Microsoft Technology Licensing Llc

Inventors

• Nikkhoo Michael
• Booveragavan Vijayasekaran
• Zeng Dongli
• Lin Tzu-Yuan
• Collins John Christopher

Classifications

• H01M10/04

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title

• H01M4/78 Primary

  Shapes other than plane or cylindrical, e.g. helical · CPC title

• H01M4/02

  Electrodes composed of, or comprising, active material · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M50/267

  having means for adapting to batteries or cells of different types or different sizes · CPC title