US 12,136,806 B2
Methods and apparatus for battery current monitoring
Devin Cass, San Francisco, CA (US); Jorge Zabaco, San Diego, CA (US); and George D. Beckstein, III, Angola, NY (US)
Assigned to Tahoe Research, Ltd., Dublin (IE)
Filed by Tahoe Research, Ltd., Dublin (IE)
Filed on Feb. 12, 2024, as Appl. No. 18/439,201.
Application 18/439,201 is a continuation of application No. 18/172,751, filed on Feb. 22, 2023, granted, now 11,901,723.
Application 18/172,751 is a continuation of application No. 16/914,306, filed on Jun. 27, 2020, granted, now 11,594,871, issued on Feb. 28, 2023.
Application 16/914,306 is a continuation of application No. 15/587,111, filed on May 4, 2017, granted, now 10,707,672, issued on Jul. 7, 2020.
Prior Publication US 2024/0186785 A1, Jun. 6, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H02H 3/093 (2006.01); H02H 3/087 (2006.01)
CPC H02H 3/093 (2013.01) [H02H 3/087 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An apparatus to prevent injury from a wearable device, the apparatus comprising:
a haptic device;
an isolation switch configured to interrupt delivery of power from a battery to the haptic device;
an integrator configured to integrate a signal based on a current from the battery to the haptic device to generate an integrator output; and
control logic configured to control the isolation switch based on a comparison of the integrator output to a threshold, wherein prior to activating the isolation switch to interrupt the current, the control logic is configured to start a first delay period to allow system state information to be saved,
wherein the control logic is further configured to, after activating the isolation switch to interrupt the current, start a second delay period before resetting the isolation switch.