公开(公告)号：US12136840B2

公开(公告)日：2024-11-05

申请号：US17561779

申请日：2021-12-24

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Muhamad Ridzuan Azizan ,  Kow Chee Chong ,  Macwien Krishnamurhti ,  Wai Mun Lee ,  Chen Kok Yeoh ,  Yik Chuang Joseph Ting

IPC: H01M10/46 ,  H01M10/0525 ,  H01M10/42 ,  H01M10/48 ,  H01M50/298 ,  H02J7/00

Abstract: A system comprises a battery and a battery-powered device. Battery contacts and a data interface are therebetween. The battery includes low-power and high-power circuits to output power, from a cell, to the battery-powered device via the contacts. The high-power circuit outputs power higher than the low-power circuit. A switch(es) connects and disconnects the high-power circuit to/from the contacts, the low-power circuit connected to the contacts when the switch disconnects the high-power circuit. A voltage detector: detects a battery-voltage on the contacts and an output voltage on the data interface; when the output voltage is greater than the battery-voltage, controls the switch to connect the high-power circuit to the contacts; and when the output voltage is below the battery-voltage, controls the switch to disconnect the high-power circuit from the contacts. The battery-powered device provides the output voltage on the data interface as powered from the contacts by the battery.

公开(公告)号：US11108253B2

公开(公告)日：2021-08-31

申请号：US16226293

申请日：2018-12-19

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Mohd Faisal Abdullah ,  Wai Mun Lee ,  Kow Chee Chong ,  Macwien Krishnamurhti

IPC: H02J7/00 ,  H01M10/42 ,  H02H1/00 ,  H02H7/18

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.

公开(公告)号：US11088531B2

公开(公告)日：2021-08-10

申请号：US16563424

申请日：2019-09-06

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Muhamad Ridzuan Azizan ,  Macwien Krishnamurhti ,  Kow Chee Chong ,  Chen Kok Yeoh

IPC: H02H3/093 ,  H02H3/05 ,  H02H7/18

Abstract: A device, battery and method for spark detection based on transient currents is provided. The battery includes: a cell; an interface; a first protection circuit and a second protection circuit. The first protection circuit comprises a first switch between the cell and the interface. The second protection circuit comprises a second switch between the cell and the interface. The first protection circuit is configured to: measure a load current on the cell; and open the first switch according to a first delay time based on the measurement of the load current. The second protection circuit is configured to: measure a transient current on the cell above the load current; and open the second switch according to a second delay time, lower than the first delay time, based on the measurement of the transient current.