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US 12,191,698 B2Granted
Power management for removable batteries
AssigneeGoogle Inc.
InventorsChia Hang Yeh, Hsing-Sheng Lin
Life of this patent
Estimating the term…
Abstract
An electronic device may include a power management subsystem that soft-starts freshly charged batteries upon connection. The device may be configured to operate on power from a number of batteries less than the greatest number of batteries that may be concurrently connected. Because the soft-start reduces current inrush upon connection of a fresh battery, the device may continue operating as fresh batteries are connected and depleted batteries are disconnected.
Claims19
A power delivery system, comprising:
- a first battery connection;
- a first soft-start circuit connected to the first battery connection and a main power bus, wherein the first soft-start circuit is configured to:
- provide increasing levels of power to the main power bus when a first battery having a voltage level higher than a voltage level on the main power bus is connected to the first battery connection, and
- disconnect the first battery from the main power bus when the voltage level of the first battery is less than the voltage level on the main power bus;
- a second battery connection;
- and
- a second soft-start circuit connected to the second battery connection and the main power bus, the second soft-start circuit configured to throttle power from a second battery.
4 more elements
A power delivery system, comprising:
- a first soft-start circuit;
- a second soft-start circuit;
- and
- an integrated circuit configured to execute instructions that cause the first soft-start circuit to throttle power from a first battery connected to the first soft-start circuit or throttle power from a second battery connected to the second soft-start circuit,
- the first soft-start circuit configured to allow the first battery to remain connected until a difference or ratio between a power bus voltage and a voltage of the first battery reaches a threshold.
2 more elements
An electronic device, comprising:
- a power delivery system, the power delivery system including:
- a first soft-start circuit, and
- a second soft-start circuit;
- and
- an integrated circuit configured to execute instructions that cause the first soft-start circuit to restrict power from a first battery connected to the first soft-start circuit or restrict the power from a second battery connected to the second soft-start circuit,
- the first soft-start circuit including an operational amplifier having a first input connected to the first battery and having a second input connected to a main power bus.
3 more elements
Dependencies are inferred from the claim text.