US 11,108,253 B2 · Device, battery and system to reduce battery leakage

Abstract

A device, battery and system to reduce battery leakage is provided. The system includes a battery, a battery-powered device, and an interface therebetween comprising cell contacts and a data interface. The battery comprises: a cell; a low-power protection circuit; and a high-power protection circuit configured to receive an indication via the data interface that disables the high-power protection circuit, leaving the low-power protection circuit enabled. The battery-powered device comprises: a high-power subsystem used when the battery-powered device is in an operating state; a switch between the cell contacts and the high-power subsystem; and one or more sensing circuits configured to, in response to determining one or more of a power-off state and a low-battery state: open the switch to the high-power subsystem; and transmit, to the battery, via the data interface, the indication.

Claims7

Dependent claims

A battery-powered device comprising:

battery-cell contacts;
a high-power subsystem used in an operating state;
a switch between the battery-cell contacts and the high-power subsystem;
and
a sensing circuit configured to:
in response to determining one or more of a power-off state and a low-battery state:
open the switch to the high-power subsystem;
and
in response to determining a power-on state:
close the switch to the high-power subsystem to place the high-power subsystem into the operating state,
wherein the sensing circuit comprises a combination of one or more capacitors and one or more resistors to provide power to the switch according to a time constant, the time constant selected to enable the sensing circuit to draw sufficient power from a battery via the battery-cell contacts to close the switch over a time period determined by the time constant to limit inrush current from a battery to prevent sparking at the battery-cell contacts.

8 more elements

Dependencies are inferred from the claim text.

Device, battery and system to reduce battery leakage

Life of this patent

Device, battery and system to reduce battery leakage

Life of this patent

Abstract

Claims7