公开(公告)号：US20240372171A1

公开(公告)日：2024-11-07

申请号：US18142171

申请日：2023-05-02

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Yoke Peir LIM ,  Yen Nee LEE ,  Daniel TAN ,  May San LOO ,  Kee Sin THONG ,  Wai Mun LEE

IPC: H01M10/633 ,  G01R31/389 ,  H01M10/44 ,  H01M10/48

Abstract: Device, system and method to control at least one electrical circuit to enter a low efficiency mode to heat a battery cell is provided. A temperature measurement device and battery cell parameter determination device respectively determine a temperature and impedance of a battery cell of a device. When the temperature of the battery cell is below a threshold temperature and the impedance of the battery cell is above a threshold impedance, a controller of the device controls at an electrical circuit of the device to enter a low efficiency mode by controlling the electrical circuit to draw an auxiliary current from the battery cell to heat the battery cell, the auxiliary current being below a given functional operating current of the electrical circuit, the electrical circuit having reduced functionality, relative to a given functionality when drawing a given functional operating current from the battery cell, while drawing the auxiliary current.