Microsoft patents compact battery design with split foil tabs
Microsoft describes a battery cell design that uses a rolled structure with multiple small metal tabs instead of one large tab. The filing explains how these smaller tabs are connected at specific points to create a more compact internal layout for the battery.
In the filing’s own words
A multiple foil tab battery cell includes a jelly roll structure formed by coiling a multi-layer stack between a first end and a second end. The multi-layer stack includes an anode layer and a first subset of foil tabs extending from the anode layer that are electrically coupled together at a first coupling point. The multi-layer stack further includes a cathode layer and a second subset of foil tabs extending from the cathode layer that are electrically coupled together at a second coupling point. Lead tabs serve as terminal of the battery cell and are coupled to the jelly roll structure at locations physically separated from the first coupling point and the second coupling point.
What exactly they claim (claim 1)
1. A method of forming a battery cell comprising: forming a multi-layer stack including a first electrode layer and a second electrode layer, the multi-layer stack being folded multiple times; electrically coupling, at a first coupling point, a first subset of foil tabs extending from the first electrode layer; electrically coupling, at a second coupling point, a second subset of foil tabs extending from the second electrode layer; and electrically coupling lead tabs to the battery cell at locations physically separated from the first coupling point and the second coupling point, the lead tabs serving as terminals of the battery cell.
Facts
- Company
- Microsoft (Microsoft Technology Licensing, LLC)
- Official title
- COMPACT DESIGN FOR MULTIPLE FOIL TAB BATTERY
- Publication number
- US20260302557A1
- Application number
- 19478620
- Filed
- Jun 12, 2023
- Published
- Oct 1, 2026
- Inventors
- 1
- Claims
- 20
Classified under
H01M 50/538 Electricity & electronicsH01M 10/0431 Electricity & electronicsH01M 10/0459 Electricity & electronicsH01M 50/528 Electricity & electronicsH01M 50/533 Electricity & electronicsH01M 50/536 Electricity & electronicsMore from Microsoft in Batteries & energy
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.