Dell Products Inc.

Haijin Zhang

Thomas Raymond Thibodeau

Cui Xizhi

A Battery Backup (BBU) device, method, and system is disclosed. A BBU cell includes a battery with an internal impedance. The BBU cell includes monitoring circuitry connected to the battery for monitoring a Status of Health (SOH) of the battery. The monitoring circuitry includes a MOSFET and a resistor connected in series and a master control unit connected to the MOSFET for controlling the MOSFET and determining the SOH of the battery.

Real time backup battery life check

A method, device, and system for balancing a supply current in a Power Supply Units (PSUs). The system includes a plurality of PSUs connected in parallel to a power bus. The method includes detecting a falling edge in a common Load Share (LS) signal and, in response to detecting the falling edge of the LS signal, enabling a field effect transistor (FET) and starting a timer. Prior to starting the timer, a time trigger is determined for the timer based on a current output level of a power source in the PSU. The method includes outputting a current at the current output level for the duration of the time trigger and, at the time trigger, releasing the FET and resetting the timer. The PSU includes a processor that monitors the LS signal. The LS signal determines a timing for outputting current by the PSU.

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Fujian, China

Haijin Zhang