公开(公告)号：US10884475B1

公开(公告)日：2021-01-05

申请号：US15698562

申请日：2017-09-07

Applicant: Amazon Technologies, Inc.

Inventor： John Wang ,  Matthew Wong ,  Marko Bundalo ,  Yuting Yeh ,  Kamran Mohajer ,  Vidhyananth Ramasamy Venkatasamy ,  Girish Sidhmalswamy Ghongdemath ,  Shuoqin Wang ,  Jason Allan Graetz

IPC: G06F1/32 ,  G01R31/36 ,  G06F1/3212 ,  G06F1/3287 ,  G01R31/367 ,  G01R31/389 ,  G01R31/3842

Abstract: A portable electronic device determines a battery available power for the device's battery and manages device power usage based upon the battery available power. The device includes a battery and a controller. The controller is configured to receive a first voltage value for the battery at a first time, a first current value for the battery, a second voltage value for the battery at a second time, and a second current value for the battery. It is determined that a time difference between the first time and the second time exceeds a predetermined time threshold. An estimated resistance of the battery is determined based at least on a first difference between the first current value and the second current value and a second difference between the first voltage value and the second voltage value. Real-time power usage of the device is controlled based on the estimated resistance of the battery.