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公开(公告)号：US20170117738A1
公开(公告)日：2017-04-27
申请号：US14922559
申请日：2015-10-26
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Chen Kok Yeoh , William B. Kiger , Macwien Krishnamurthi , Chin Wun Ng , Cheah Heng Tan , Mun Yew Tham
IPC: H02J7/02
CPC classification number: H02J7/025 , H02J5/005 , H02J7/027 , H02J50/80 , H02J2007/0096
Abstract: A method and apparatus for visually indicating battery pack information related to wirelessly charging a battery pack via a wireless charging mat. The method includes uniquely associating, with a controller of the wireless charging mat, each visual indicator of a first plurality of visual indicators on the wireless charging mat with one of a first plurality of sensors on the wireless charging mat. The method further includes receiving the battery pack information from the battery pack with one or more of the first plurality of sensors. The method further includes wirelessly charging the battery pack using the wireless charging mat, and illuminating the first plurality of visual indicators based on the battery pack information.
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公开(公告)号：US20210104886A1
公开(公告)日：2021-04-08
申请号：US16590816
申请日：2019-10-02
Applicant: Motorola Solutions, Inc.
Inventor： Wai Mun Lee , Macwien Krishnamurthi , Chen Kok Yeoh , Kow Chee Chong , Muhamad Ridzuan Azizan
Abstract: A method for dynamic limiting of battery voltage includes determining that a voltage delivered by a battery exceeds a predefined maximum safe voltage for operation of a portable electronic device in a hazardous environment and, in response, enabling a voltage restriction circuit in a supply line between the battery and the portable electronic device to reduce the voltage delivered by the battery below the maximum safe voltage, and supplying electrical power to the portable electronic device at the reduced voltage. Enabling the voltage restriction circuit may include deactivating a MOSFET switch that includes a forward biased body diode to allow the body diode to provide a fixed voltage drop. The method also includes determining that the voltage delivered by the battery no longer exceeds the maximum safe voltage and, in response, disabling the first voltage restriction circuit by activating the MOSFET, thus allowing the body diode to be bypassed.
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公开(公告)号：US09450636B2
公开(公告)日：2016-09-20
申请号：US14585281
申请日：2014-12-30
Applicant: MOTOROLA SOLUTIONS, INC
Inventor： Chen Kok Yeoh , Friedrich Josef Bollmann , Geng Xiang Lee @ Titus Lee , Joo Yih See
CPC classification number: H03F3/183 , H03F1/52 , H03F1/523 , H03F3/185 , H03F3/21 , H03F3/2171 , H03F3/68 , H03F2200/03 , H03F2200/432
Abstract: An intrinsically safe audio power circuit includes redundant electronic fuses disposed between the power input of an audio power amplifier and the battery source of the portable two-way radio device. The electronic fuse circuits are connected in series with each other, and each electronic fuse circuit includes a series switch transistor that can shut off the flow of current between the battery and the audio power amplifier. Each electronic fuse circuit also includes a current sense portion, and when the current through the electronic fuse circuits reaches a current threshold, it will shut off its series switch transistor using an active bias circuit in order to ensure sufficiently rapid shut off.
Abstract translation: 本质安全的音频电源电路包括设置在音频功率放大器的电源输入和便携式双向无线电设备的电池源之间的冗余电子保险丝。 电子熔丝电路彼此串联连接，并且每个电子熔丝电路包括可以截止电池和音频功率放大器之间的电流的串联开关晶体管。 每个电子熔丝电路还包括电流感测部分，并且当通过电子熔丝电路的电流达到电流阈值时，它将使用有源偏置电路来切断其串联开关晶体管，以确保充分快速的切断。
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公开(公告)号：US11843127B2
公开(公告)日：2023-12-12
申请号：US17303961
申请日：2021-06-11
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Muhamad Ridzuan Azizan , Kow Chee Chong , Md Reduan Md Saad , Chen Kok Yeoh , Macwien Krishnamurthi
IPC: H01M50/483
CPC classification number: H01M50/483 , H01M2200/00 , H01M2220/30
Abstract: A battery, method and battery operated portable communication device are provided with protection from excessive current and thermal conditions. A plurality of protection circuits are coupled in series within a common charge/discharge path of the battery. The first protection circuit is configured to block current by opening a switch in response to a voltage drop across the switch and a current sense resistor in the common charge/discharge path. The second protection circuit provides redundancy under conditions where the first switch might fail, where the second switch will block current through the current sense resistor.
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公开(公告)号：US11387645B2
公开(公告)日：2022-07-12
申请号：US16869620
申请日：2020-05-08
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Muhamad Ridzuan Azizan , Chen Kok Yeoh , Wai Mun Lee , Mohd Faisal Abdullah , Kow Chee Chong , Macwien Krishnamurthi
Abstract: An apparatus and method for providing a selectively reduced voltage to a portable electronic device are disclosed. When a determination is made that an output voltage from a voltage source exceeds a predefined maximum permitted voltage, a plurality of circuitries, including an adaptive active current limiting circuitry, are enabled in order to derive the reduced voltage from the output voltage. The reduced voltage is at least at or below the predefined maximum permitted voltage and is supplied to the portable electronic device by battery circuitry that includes the active current limiting circuitry.
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Patent Agency Ranking
公开(公告)号：US20210265847A1
公开(公告)日：2021-08-26
申请号：US16799422
申请日：2020-02-24
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Muhamad Ridzuan Azizan , Abdul Rashid Abdul Halim , Friedrich Bollmann , Kow Chee Chong , Jeevan Kanesalingam , Macwien Krishnamurthi , Chen Kok Yeoh
Abstract: A battery module includes a first load terminal, a second load terminal, a first charger terminal, a charger enable terminal, and a battery having a first battery terminal coupled to the first load terminal and a second terminal coupled to the second load terminal. A first isolation device is coupled between the first load terminal and the first charger terminal and has an enable terminal coupled to the charger enable terminal. A first protection circuit includes a second isolation device coupled between the second battery terminal and the second load terminal and a first sensing circuit configured to enable the second isolation device responsive to detecting a failure of the first isolation device.
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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.
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公开(公告)号：US11502520B2
公开(公告)日：2022-11-15
申请号：US16799422
申请日：2020-02-24
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Muhamad Ridzuan Azizan , Abdul Rashid Abdul Halim , Friedrich Bollmann , Kow Chee Chong , Jeevan Kanesalingam , Macwien Krishnamurthi , Chen Kok Yeoh
Abstract: A battery module includes a first load terminal, a second load terminal, a first charger terminal, a charger enable terminal, and a battery having a first battery terminal coupled to the first load terminal and a second terminal coupled to the second load terminal. A first isolation device is coupled between the first load terminal and the first charger terminal and has an enable terminal coupled to the charger enable terminal. A first protection circuit includes a second isolation device coupled between the second battery terminal and the second load terminal and a first sensing circuit configured to enable the second isolation device responsive to detecting a failure of the first isolation device.
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9.发明授权公开(公告)号：US11264814B2
公开(公告)日：2022-03-01
申请号：US16869627
申请日：2020-05-08
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Muhamad Ridzuan Azizan , Chen Kok Yeoh , Wai Mun Lee , Mohd Faisal Abdullah , Kow Chee Chong , Macwien Krishnamurthi
IPC: H02J7/00 , H01M50/528
Abstract: Battery circuitry forms part of apparatus for connecting a battery power source to a portable electronic device. The battery circuitry is configured to detect a transitioning of an enable signal, caused by actuation of a power switch, from a de-asserted state to an asserted state. In response to detecting the transitioning of the enable signal, the battery circuitry is further configured to open an electrical path within the battery circuitry. The path, when opened, connects the battery power source in a manner that permits powering on of the portable electronic device.
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公开(公告)号：US11211785B2
公开(公告)日：2021-12-28
申请号：US16590816
申请日：2019-10-02
Applicant: Motorola Solutions, Inc.
Inventor： Wai Mun Lee , Macwien Krishnamurthi , Chen Kok Yeoh , Kow Chee Chong , Muhamad Ridzuan Azizan
Abstract: A method for dynamic limiting of battery voltage includes determining that a voltage delivered by a battery exceeds a predefined maximum safe voltage for operation of a portable electronic device in a hazardous environment and, in response, enabling a voltage restriction circuit in a supply line between the battery and the portable electronic device to reduce the voltage delivered by the battery below the maximum safe voltage, and supplying electrical power to the portable electronic device at the reduced voltage. Enabling the voltage restriction circuit may include deactivating a MOSFET switch that includes a forward biased body diode to allow the body diode to provide a fixed voltage drop. The method also includes determining that the voltage delivered by the battery no longer exceeds the maximum safe voltage and, in response, disabling the first voltage restriction circuit by activating the MOSFET, thus allowing the body diode to be bypassed.
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