Abstract: Selective discharging of a rechargeable battery pack across a power supply system load is provided, which includes determining occurrence of a condition within the power supply system, the power supply system including a power supply circuit and a backup energy source. The power supply circuit receives main input power, and the backup energy source is operatively coupled to the power supply circuit to supply backup power to the system load when main power input to the power supply circuit is unavailable. Based on determining occurrence of the condition within the power supply system, a controller actively discharges a rechargeable battery pack of the backup energy source. The actively discharging includes controlling the power supply circuit to force discharging of power from the rechargeable battery pack to the power supply system load by suspending the main input power within the system from powering the system load.

Abstract: Selective discharging of a rechargeable battery pack across a power supply system load is provided, which includes determining occurrence of a condition within the power supply system, the power supply system including a power supply circuit and a backup energy source. The power supply circuit receives main input power, and the backup energy source is operatively coupled to the power supply circuit to supply backup power to the system load when main power input to the power supply circuit is unavailable. Based on determining occurrence of the condition within the power supply system, a controller actively discharges a rechargeable battery pack of the backup energy source. The actively discharging includes controlling the power supply circuit to force discharging of power from the rechargeable battery pack to the power supply system load by suspending the main input power within the system from powering the system load.

Abstract: Computer-implemented managing of battery capacity within a battery system is provided. The managing includes obtaining, by one or more processors, data representative of a number (N) of battery packs in the battery system, and ascertaining, by the processor(s), a battery pack self-discharge time interval (TD) from full-charge to a partially discharged threshold for initiating top-off charging. The managing also includes determining, by the processor(s), a charge-staggering time interval (TS) using the number (N) of battery packs in the battery system and the ascertained battery pack self-discharge time interval (TD), and staggering, by the processor(s), top-off charging of the battery packs of the N battery packs in the battery system using, at least in part, the charge-staggering time interval (TS).

Abstract: A method for increasing temperature of a battery pack includes determining whether a temperature of a cell in the battery pack is above a lower threshold temperature. The method further includes charging, by a current directly from a charger, a balancing circuit including a resistor in proximity to the cell. The method also includes increasing the temperature of the cell in the battery pack.

Abstract: Computer-implemented managing of battery capacity within a battery system is provided. The managing includes obtaining, by one or more processors, data representative of a number (N) of battery packs in the battery system, and ascertaining, by the processor(s), a battery pack self-discharge time interval (TD) from full-charge to a partially discharged threshold for initiating top-off charging. The managing also includes determining, by the processor(s), a charge-staggering time interval (TS) using the number (N) of battery packs in the battery system and the ascertained battery pack self-discharge time interval (TD), and staggering, by the processor(s), top-off charging of the battery packs of the N battery packs in the battery system using, at least in part, the charge-staggering time interval (TS).

Abstract: A battery pack configured for discharging to a desired state of charge (SoC) after a fault event that includes a plurality of battery cells and a balancing circuit connected to each of the battery cells. The balancing circuit is configured to measure operational values of each of the battery cells. The battery pack further includes a microcontroller configured to receive the operational values from the balancing circuit, compare the operational values to a prescribed threshold values and issue commands to selectively discharge one or more of the battery cells across the balancing circuit.

Abstract: A method for increasing temperature of a battery pack includes determining whether a temperature of a cell in the battery pack is above a lower threshold temperature. The method further includes charging, by a current directly from a charger, a balancing circuit including a resistor in proximity to the cell. The method also includes increasing the temperature of the cell in the battery pack.

Abstract: A battery pack configured for discharging to a desired state of charge (SoC) after a fault event that includes a plurality of battery cells and a balancing circuit connected to each of the battery cells. The balancing circuit is configured to measure operational values of each of the battery cells. The battery pack further includes a microcontroller configured to receive the operational values from the balancing circuit, compare the operational values to a prescribed threshold values and issue commands to selectively discharge one or more of the battery cells across the balancing circuit.

Abstract: A method, system, and computer program product for detecting and interrupting a ground fault in a direct current (DC) power circuit are provided in the illustrative embodiments. A first value of a first current flow over a first part of the DC power circuit is compared with a second value of a second current flow over a second part of the DC power circuit. A voltage is generated, wherein the voltage is proportional to a difference between the first and the second values. Responsive to the voltage exceeding the threshold voltage for a threshold time, a signal output is produced, the signal configured to cause a short-circuit in the first part of the DC power circuit. The first part of the DC power circuit is interrupted responsive to the short-circuit.

Abstract: A method, system, and computer program product for detecting and interrupting a ground fault in a direct current (DC) power circuit are provided in the illustrative embodiments. A first value of a first current flow over a first part of the DC power circuit is compared with a second value of a second current flow over a second part of the DC power circuit. A voltage is generated, wherein the voltage is proportional to a difference between the first and the second values. Responsive to the voltage exceeding the threshold voltage for a threshold time, a signal output is produced, the signal configured to cause a short-circuit in the first part of the DC power circuit. The first part of the DC power circuit is interrupted responsive to the short-circuit.

Abstract: A bulk power assembly includes a bulk power distribution (BPD) subassembly and a bulk power controller and hub (BPCH) subassembly coupled to the BPD subassembly. The BPD assembly is configured to provide bulk DC power from both AC input power and DC input power. The BPD subassembly is configured to distribute the DC bulk power. The BPCH subassembly is configured to monitor and control the BPD assembly.

Abstract: A bulk power assembly includes a bulk power distribution (BPD) subassembly and a bulk power controller and hub (BPCH) subassembly coupled to the BPD subassembly. The BPD assembly is configured to provide bulk DC power from both AC input power and DC input power. The BPD subassembly is configured to distribute the DC bulk power. The BPCH subassembly is configured to monitor and control the BPD assembly.

Abstract: A method for preventing air recirculation in a data center is provided.

Abstract: The capability of base power units which have phase switching capabilities which can be controlled upon sensing the power condition and status of other base power units is taken advantage of to provide a modular scalable power assembly. The base power units, which are preferably identical, are inserted into a plurality of slots so as to be pluggable into a circuit backplane which automatically provides the requisite interconnections between the base power units. The power assembly of the present invention is particularly useful in supplying power to scalable parallel processing computer systems.