Power management circuit for multi-cell power storage devices
AssigneeGoogle Inc.
InventorsChao Fei, Douglas Osterhout, Srikanth Lakshmikanthan
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Abstract
In general, techniques are described that are directed to a device having a first power storage device and a second power storage device connected in series. A first power converter may generate, using electrical energy sourced from the first power storage device and the second power storage device, a first power signal to power a first set of components. A second power converter may generate, using electrical energy sourced from the first power storage device and not the second power storage device, a second power signal to power a second set of components.
Claims15
A foldable device comprising:
- a first portion;
- a second portion, the first portion covering at least portion of the second portion when the foldable device is folded along an axis;
- a first power storage device housed in the first portion;
- a second power storage device housed in the second portion and connected in series with the first power storage device, wherein the first power storage device has a different power storage capacity than the second power storage device;
- a first power converter configured to generate, using electrical energy sourced from the first power storage device and the second power storage device, a first power signal to power a first set of components;
- a second power converter configured to generate, using electrical energy sourced from the first power storage device and not the second power storage device, a second power signal to power a second set of components;
- and
- an active balance circuit connected with the first power storage device and the second power storage device and configured to transfer energy between the first power storage device and the second power storage device.
A method comprising:
- generating, by a first power converter and using electrical energy sourced from a first power storage device and a second power storage device, a first power signal to power a first set of components, wherein the first power storage device has a different power storage capacity than the second power storage device;
- generating, by a second power converter and using electrical energy sourced from the first power storage device and not the second power storage device, a second power signal to power a second set of components;
- and
- transferring, by an active balance circuit connected with the first power storage device and the second power storage device, energy between the first power storage device and the second power storage device,
- wherein the first power storage device has a different power storage capacity than the second power storage device, the first power storage device is housed in a first portion of a foldable device, the second power storage device is housed in a second portion of the foldable device, and the first portion cover at least portion of the second portion when the foldable device is folded along axis.
Dependencies are inferred from the claim text.