Compact design for multiple foil tab battery
AssigneeMicrosoft Technology Licensing, LLC
InventorWei LI
Life of this patent
Estimating the term…
Abstract
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.
Claims20
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.
A battery cell including:
- a jelly roll structure comprising a multi-layer stack coiled around a first axis between a first end and a second end, the multi-layer stack including at least an anode layer and a cathode layer;
- a first subset of foil tabs extending from the anode layer, the first subset of foil tabs being electrically coupled together at a first coupling point;
- a second subset of foil tabs extending from the cathode layer, the second subset of foil tabs being electrically coupled together at a second coupling point;
- and
- lead tabs serving as terminals of the battery cell, the lead tabs being coupled to the jelly roll structure at locations physically separated from the first coupling point and the second coupling point.
A battery cell including:
- a jelly roll structure comprising a multi-layer stack coiled between a first end and a second end, the multi-layer stack including at least an anode layer and a cathode layer;
- a first subset of foil tabs extending from the anode layer, the first subset of foil tabs being electrically coupled together;
- a second subset of foil tabs extending from the cathode layer, the second subset of foil tabs being electrically coupled together;
- and
- lead tabs serving as terminals of the lithium ion battery cell, the lead tabs extending from an end of the battery cell that is opposite the first subset of foil tabs and the second subset of foil tabs.
Dependencies are inferred from the claim text.