VARIABLE LAYER THICKNESS IN CURVED BATTERY CELL

• US 20180069259A1
• Filed: 11/14/2017
• Published: 03/08/2018
• Est. Priority Date: 08/29/2016
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Nikkhoo, Michael, Boovaragavan, Vijayasekaran, Zeng, Dongli, Lin, Tzu-Yuan, Collins, John Christopher
• Granted Patent: US 10,170,788 B2
• Time in Patent Office: Days
• CPC Class Codes: 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
• CPC Class Codes: G06F 1/163 Wearable computers, e.g. on a belt
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 2004/021 Physical characteristics, e.g. porosity, surface area
• CPC Class Codes: H01M 2004/025 with shapes other than plane or cylindrical
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 4/78 Shapes other than plane or cylindrical, e.g. helical
• CPC Class Codes: H01M 50/267 having means for adapting to batteries or cells of different types or different sizes
• CPC Class Codes: H01M 6/42 Grouping of primary cells into batteries H01M6/40 takes precedence
• CPC Class Codes: H04M 1/0262 for a battery compartment
• CPC Class Codes: H05K 5/0017 with operator interface units
• CPC Class Codes: H05K 5/0086 portable, e.g. battery operated apparatus casings for switching devices H01H9/02
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

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

1. A battery, comprising:

an anode arranged on an anode substrate, the anode substrate being curved with a first arc length;

a cathode arranged on a cathode substrate, the cathode substrate being curved with a second arc length; and

a separator between the anode and the cathode,

wherein the first arc length differs from the second arc length to define tapered edges of the battery.

2. The battery of claim 1, wherein a thickness of the anode substrate and a thickness of the cathode substrate are respectively determined based on a curvature of the anode substrate and on a curvature of the cathode substrate.

3. The battery of claim 2, wherein the curvature of anode substrate is greater than the curvature of the cathode substrate, and wherein the thickness of the anode substrate is greater than the thickness of the cathode substrate.

4. The battery of claim 2, wherein the curvature of the cathode substrate is greater than the curvature of the anode substrate, and wherein the thickness of the cathode substrate is greater than the thickness of the anode substrate.

5. The battery of claim 1, wherein a thickness of the anode substrate is between 2 and 18 μ

m.

6. The battery of claim 1, wherein a thickness of the cathode substrate is between 4 and 26 μ

m.

7. The battery of claim 1, wherein

the anode is one of a plurality of anodes each arranged on a respective anode substrate,

the cathode is one of a plurality of cathodes each arranged on a respective cathode substrate,

the separator is one of a plurality of separators each arranged between a respective anode-cathode pair, the battery further comprising:

a plurality of anode tabs, each anode tab coupled to a respective anode of the plurality of anodes, the plurality of anode tabs coupled together to form a battery anode tab; and

a plurality of cathode tabs, each cathode tab coupled to a respective cathode of the plurality of cathodes, the plurality of cathode tabs coupled together to form a battery cathode tab.

8. The battery of claim 7, wherein a thickness of a first cell formed of a first anode-cathode pair, a first anode substrate, a first cathode substrate, and a first separator is greater than a thickness of a second cell formed of a second anode-cathode pair, a second anode substrate, a second cathode substrate, and a second separator, a curvature of the first cell being greater than a curvature of the second cell.

9. The battery of claim 8, wherein a ratio of a curvature of an anode of the first anode-cathode pair to a thickness of the first anode substrate is substantially equal to a ratio of a curvature of an anode of the second anode-cathode pair to a thickness of the second anode substrate, and wherein a ratio of a curvature of a cathode of the first anode-cathode pair to a thickness of the first cathode substrate is substantially equal to a ratio of a curvature of a cathode of the second anode-cathode pair to a thickness of the second cathode substrate.

10. The battery of claim 8, wherein a thickness of the first separator is greater than a thickness of the second separator.

11. The battery of claim 1, wherein a thickness of the anode differs from a thickness of the cathode.

12. A battery cell, comprising:

an anode arranged on an anode substrate;

a cathode arranged on a cathode substrate; and

a separator between the anode and the cathode,

wherein the battery cell is curved, and

wherein a thickness of the cathode substrate is greater than a thickness of the anode substrate.

13. The battery cell of claim 12, wherein an average radius of curvature of the battery cell is between 100 mm and 400 mm.

14. The battery cell of claim 12, wherein a thickness of the anode substrate and a thickness of the cathode substrate are respectively determined based on a curvature of the anode substrate and on a curvature of the cathode substrate.

15. The battery cell of claim 12, wherein a thickness of the anode substrate is between 2 and 18 μ

m.

16. The battery cell of claim 12, wherein the battery cell is one of a plurality of battery cells arranged in a housing and electrically coupled together via a battery anode tab and a battery cathode tab to form a battery.

17. The battery cell of claim 16, wherein a thickness of a first battery cell is greater than a thickness of a second battery cell, and wherein a curvature of the first battery cell is greater than a curvature of the second battery cell.

18. The battery cell of claim 16, wherein a ratio of a curvature of an anode of a first battery cell to a thickness of a first anode substrate of the first battery cell is substantially equal to a ratio of a curvature of an anode of a second battery cell to a thickness of a second anode substrate of the second battery cell, and wherein a ratio of a curvature of a cathode of the first battery cell to a thickness of a first cathode substrate of the first battery cell is substantially equal to a ratio of a curvature of a cathode of the second battery cell to a thickness of a second cathode substrate of the second battery cell.

19. A portable electronic device, comprising:

a display;

a processor and memory; and

a curved battery configured to power the portable electronic device, the curved battery comprising;

an anode arranged on an anode substrate;

a cathode arranged on a cathode substrate; and

a separator between the anode and the cathode,

wherein a thickness of the cathode substrate is greater than a thickness of the anode substrate.

20. The portable electronic device of claim 19, wherein an average radius of curvature of the battery is between 100 mm and 400 mm.