公开(公告)号：US20220216712A1

公开(公告)日：2022-07-07

申请号：US17702944

申请日：2022-03-24

Applicant: Cisco Technology, Inc.

Inventor： Xiqun ZHU ,  Sung Kee BAEK ,  Wingo CHEONG ,  Steven Anthony GRANZELLA ,  Joel GOERGEN ,  Charles Calvin BYERS

IPC: H02J7/00

Abstract: In one embodiment, a battery backup unit (BBU) cut-off and recharge circuit includes: a first transistor, a power entry connection connected to a main power supply, where power from the power entry connection flows to application circuits for an electronic device, and the first transistor is positioned between a BBU and the power entry connection, and a microcontroller, where the microcontroller is operative to: detect a loss of power from the main power supply, turn on the first transistor to enable the BBU to discharge through the power entry connection to application circuits, detect a status of charge (SOC) for the BBU, and upon detecting that the SOC is under a predefined threshold, set the BBU cut-off and recharge circuit to a lockdown state by turning off the first transistor.

公开(公告)号：US20210066936A1

公开(公告)日：2021-03-04

申请号：US17097611

申请日：2020-11-13

Applicant: Cisco Technology, Inc.

Inventor： Xiqun ZHU ,  Sung Kee BAEK ,  Wingo CHEONG ,  Steven Anthony GRANZELLA ,  Joel GOERGEN ,  Charles Calvin BYERS

IPC: H02J7/00

Abstract: In one embodiment, a battery backup unit (BBU) cut-off and recharge circuit includes: a first transistor, a power entry connection connected to a main power supply, where power from the power entry connection flows to application circuits for an electronic device, and the first transistor is positioned between a BBU and the power entry connection, and a microcontroller, where the microcontroller is operative to: detect a loss of power from the main power supply, turn on the first transistor to enable the BBU to discharge through the power entry connection to application circuits, detect a status of charge (SOC) for the BBU, and upon detecting that the SOC is under a predefined threshold, set the BBU cut-off and recharge circuit to a lockdown state by turning off the first transistor.